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Nexen Inc. Delivers Strong Fourth Quarter and Annual Financial Results in 2006

2006 Highlights:

- Record annual cash flow of $2.7 billion ($10.18/share)-an increase of 11% over 2005

- Annual earnings of $601 million ($2.29/share)

- Proved reserve additions of 341 million boe, replacing approximately 440% of 2006 production

- 2007 net production expected to grow approximately 50%

- Buzzard field on stream-production ramping up to expected peak rates of 85 mboe/d net

- Long Lake project on track for 2007 start up

- Exploration successes at Alam


                                   Three Months Ended  Twelve Months Ended
                                          December 31          December 31
                                   ------------------- --------------------
(Cdn$ millions)                        2006      2005       2006      2005
---------------------------------------------------------------------------
Production (mboe/d)(1)
 Before Royalties                       207       225        212       242
 After Royalties                        161       165        156       173
Net Sales                               920     1,073      3,936     4,086
Cash Flow from Operations(2)            673       772      2,669     2,403
 Per Common Share ($/share)(2)         2.56      2.96      10.18      9.23
Net Income                               77       303        601     1,140
 Per Common Share ($/share)            0.29      1.16       2.29      4.38
Capital Expenditures                    951       731      3,458     2,691
---------------------------------------------------------------------------

(1) Production and reserves in this release also include our share of
    Syncrude oil sands. US investors should read the Cautionary Note to US
    Investors at the end of this release.
(2) For reconciliation of this non-GAAP measure, see Cash Flow from
    Operations on pg. 9.

Strong commodity prices, together with attractive cash operating margins and outstanding contributions from our marketing division, resulted in solid financial results for the fourth quarter and the year.

Fourth quarter cash flow was $673 million, while net income was $77 million. Our marketing division generated $147 million of cash flow in the quarter, primarily through an increase in the value of financial contracts protecting the value of physical storage which will be delivered in the future. Net income for the quarter was reduced by $61 million to adjust the carrying value of certain oil and gas properties located primarily on the shelf of the Gulf of Mexico, $49 million of stock-based compensation expense and $80 million of exploration expense. This includes three unsuccessful wells in the Gulf of Mexico, three wells in Yemen, and one well in Colombia.

Cash flow for the year grew 11% to a record $2.7 billion, while net income was $601 million. Oil prices reached new highs resulting in a 9% increase in our realized commodity price over 2005. In addition, our marketing division had a record year as they were able to leverage their physical inventory and transportation assets, and capitalize on market volatility, primarily in summer/winter natural gas price spreads. These positive contributions were offset by charges which reflected the settlement of the Yemen Block 51 arbitration ($104 million after tax), an increase in the UK tax rate ($277 million) and the reduction in the carrying value of oil and gas assets ($61 million after tax).

"Overall, I am very pleased with our performance in 2006," said Charlie Fischer, Nexen's President and Chief Executive Officer. "We have completed Buzzard and the Syncrude Stage 3 expansion, and made solid progress at our Long Lake project which will start up later this year. Our accomplishments position us for an exciting 2007 as we ramp up production at Buzzard, bring Long Lake on stream, evaluate our recent discoveries and continue our exploration program."


Oil and Gas Production

                Production before Royalties   Production after Royalties
Crude Oil, NGLs          Fourth       Third         Fourth         Third
and Natural Gas         Quarter     Quarter        Quarter       Quarter
 (mboe/d)                  2006        2006           2006          2006
--------------------------------------------- -----------------------------
Yemen                        84          90             52            50
United Kingdom               24          15             24            15
Canada                       38          37             31            30
United States                33          34             28            29
Other Countries               6           7              6             6
Syncrude                     22          20             20            18
                  --------------------------- -----------------------------
Total                       207         203            161           148
                  --------------------------- -----------------------------

                Production before Royalties   Production after Royalties
Crude Oil, NGLs
 and Natural Gas         Annual      Annual         Annual        Annual
 (mboe/d)                  2006        2005           2006          2005
--------------------------------------------- -----------------------------
Yemen                        93         113             52            61
United Kingdom               20          16             20            16
Canada                       38          50(1)          31            40(1)
United States                36          42             31            36
Other Countries               6           5              6             5
Syncrude                     19          16             16            15
                  --------------------------- -----------------------------
Total                       212         242            156           173
                  --------------------------- -----------------------------

(1) Annual volumes include approximately 10,700 boe/d before royalties and
    8,100 boe/d after royalties of production related to asset dispositions
    in 2005.

Our 2006 annual production averaged 212,000 boe/d (156,000 boe/d after royalties) as compared to 242,000 boe/d (173,000 boe/d after royalties) in 2005. Natural declines from our properties in Yemen and the Gulf of Mexico reduced production year over year as did asset dispositions in Canada in mid-2005. Since year end, we have added incremental production at Aspen and Buzzard.

Capital Strategy - Investing in Long-Term, High-Value Production Growth

"We are building material and sustainable businesses in the deep-water Gulf of Mexico, Athabasca oil sands, North Sea and offshore West Africa," said Fischer. "Our projects tend to have longer cycle-times and require significant upfront capital investment." In 2006, we had over $5 billion invested in projects not yet producing oil or cash flow. With Buzzard and the Syncrude Stage 3 expansion now on stream, this investment is translating into production and cash flow. We expect our production after royalties to increase approximately 50%, from 156,000 boe/d in 2006 to between 230,000 and 260,000 boe/d in 2007. We currently have over $2.5 billion invested in non-producing development projects like Long Lake and Ettrick that will deliver additional cash flow and production growth in the future.

As part of our strategy to protect against commodity price downturns while preserving upside to higher prices, we have options in place providing a WTI floor price of US$50/bbl on approximately 38 million barrels of 2007 crude oil production.

2006 Reserves and Capital Results

In 2006, we invested $3.3 billion in oil and gas activities adding 341 mmboe of proved reserves, replacing approximately 440% of our production. Over the past five years we have invested approximately $14 billion and added approximately 749 mmboe, replacing 164% of our production. In 2006, our proved reserve additions include 246 mmboe at Long Lake.


               2006 Oil and Gas Investment(1) (Cdn$ millions)
---------------------------------------------------------------------------

                         Core Asset        Major  Early-stage
                        Development  Development  Development  Exploration
---------------------------------------------------------------------------
Canada                          128          167           15          134
United States                   387           31            -          242
International                   183          552           34          198
Synthetic                         -        1,050           74           45
                       ----------------------------------------------------
Total Oil and Gas               698        1,800          123          619
Mining (Syncrude)                37           49            -            -
                       ----------------------------------------------------
Total Including Mining          735        1,849          123          619
                       ----------------------------------------------------
% of Total                       22%          55%           4%          19%
---------------------------------------------------------------------------

---------------------------------------------------------------------------

                                             Proved Property
                                                Acquisitions      Total (2)
---------------------------------------------------------------------------
Canada                                                    12           456
United States                                              -           660
International                                              1           968
Synthetic                                                  -         1,169
                                                     ----------------------
Total Oil and Gas                                         13         3,253
Mining (Syncrude)                                          -            86
                                                     ----------------------
Total Including Mining                                    13         3,339
                                                     ----------------------
% of Total                                                 -           100%
---------------------------------------------------------------------------

(1) Geological and geophysical expenditures of $128 million are included.

(2) Non-oil and gas investments totaled $119 million. Total 2006 capital
    investment was $3,458 million.

---------------------------------------------------------------------------
                           2006 Reserve Continuity
---------------------------------------------------------------------------
                                    Oil and Gas Activities
---------------------------------------------------------------------------
                           International            US         Canada
               ------------------------------------------------------------
                                        Other
                Yemen   United Kingdom   Intl
mmboe             Oil     Oil    Gas      Oil    Oil  Gas  Oil Gas Bitumen
---------------------------------------------------------------------------
PROVED RESERVES(1)

Dec. 31, 2005     105     143      2       11     47   43   59  58       -
Extensions and
 Discoveries        4      23      2       30      2    5    1  10       -
Revisions          (8)     19      1        1     (8)  (3)   4  (1)    246
Production        (35)(4)  (6)    (2)      (2)    (7)  (6)  (7) (6)      -
               ------------------------------------------------------------
Dec. 31, 2006      66     179      3       40     34   39   57  61     246
               ------------------------------------------------------------

PROBABLE
 RESERVES (1,2)

Dec. 31, 2005      26     171      8       84      9   10   23  53     400
Extensions,
 Discoveries &
 Conversions       (3)    (24)    (1)     (30)    60   24    6  (7)   (246)
Revisions          (1)      5      1        5      -   (4)  (7) (6)      -
               ------------------------------------------------------------
Dec. 31, 2006      22     152      8       59     69   30   22  40     154
               ------------------------------------------------------------

PROVED + PROBABLE
RESERVES (1,2)

Dec. 31, 2005     131     314     10       95     56   53   82 111     400
Extensions,
 Discoveries &
 Conversions        1      (1)     1        -     62   29    7   3    (246)
Revisions          (9)     24      2        6     (8)  (7)  (3) (7)    246
Production        (35)(4)  (6)    (2)      (2)    (7)  (6)  (7) (6)      -
               ------------------------------------------------------------
Dec. 31, 2006      88     331     11       99    103   69   79 101     400
               ------------------------------------------------------------



---------------------------------------------------------------------------



                                  Total Oil        Mining   Total Oil, Gas
mmboe                               and Gas      Syncrude(3)    and Mining
---------------------------------------------------------------------------
PROVED RESERVES(1)

Dec. 31, 2005                           468           318              786
Extensions and
 Discoveries                             77            13               90
Revisions                               251             -              251
Production                              (71)           (7)             (78)
                                      -------------------------------------
Dec. 31, 2006                           725           324            1,049
                                      -------------------------------------
PROBABLE RESERVES (1,2)

Dec. 31, 2005                           784            51              835
Extensions,
 Discoveries &
 Conversions                           (221)           (5)            (226)
Revisions                                (7)            -               (7)
                                      -------------------------------------
Dec. 31, 2006                           556            46              602
                                      -------------------------------------
PROVED + PROBABLE
RESERVES (1,2)

Dec. 31, 2005                         1,252           369            1,621
Extensions,
 Discoveries &
 Conversions                           (144)            8             (136)
Revisions                               244             -              244
Production                              (71)           (7)             (78)
                                      -------------------------------------
Dec. 31, 2006                         1,281           370            1,651
                                      -------------------------------------

(1) We internally evaluate all of our reserves and have at least 80% of our
    proved reserves assessed by independent qualified consultants each
    year. Our reserves are also reviewed and approved by our Reserves
    Committee and our Board of Directors. Reserves represent our working
    interest before royalties at year-end constant pricing using SEC rules.
    Gas is converted to equivalent oil at a 6:1 ratio.
(2) Probable reserves are determined according to SPE/WPC definitions. US
    investors should read the Cautionary Note to US Investors at the end of
    this release.
(3) US investors should read the Cautionary Note to US Investors at the end
    of this release.
(4) Production includes volumes used for fuel in Yemen.

Major and Early Stage Development Projects

Approximately 60% of our 2006 oil and gas invested capital was directed towards early stage and major development projects including Buzzard, Long Lake, Syncrude Stage 3 and coalbed methane (CBM). These projects added approximately 300 mmboe of proved reserves and are characterized by multi-year investments which result in timing differences between reserve additions and capital expenditures.

Buzzard

At Buzzard, we invested $488 million in 2006 to complete the initial development and added 20 mmboe of proved reserves. These reserve additions resulted from both development drilling and an increase in the proved recovery factor. To date, we have recognized 146 mmboe of proved reserves and 267 mmboe of proved plus probable reserves for the Buzzard field. Buzzard is performing as expected with an upward trend in production rates. Daily rates have averaged over 100,000 bbls (gross) in the last week. We are on track to reach peak rates of 200,000 boe/d (gross) by mid-year as we optimize the wells and facility.

Elsewhere in the UK North Sea, we invested $64 million and added 25 mmboe of proved reserves with approximately 70% of these reserves related to our Ettrick development project. Production at Ettrick is expected to commence in the first half of 2008, with our share reaching approximately 16,000 boe/d. We operate Ettrick with an 80% interest.

Synthetic Crude Oil

In 2006, we invested approximately $1.2 billion to develop our insitu oil sands resource. This included approximately $1.1 billion invested at our first phase of Long Lake. In 2006, we converted 246 mmboe of probable bitumen reserves to proved reserves.

Our oil sands strategy addresses the issues of wide differentials and high natural gas and diluent costs which erode the value of insitu bitumen. Our project integrates field upgrading with bitumen production to produce a high quality premium synthetic crude oil and substantially reduces our dependence on natural gas. This results in a significant operating cost advantage of approximately $10/bbl in the current price environment.

Long Lake continues to progress well. The SAGD facilities are in the final stages of commissioning and start up and we expect steam injection to commence at the end of the first quarter of 2007, with bitumen production ramping up to peak rates over a 12 to 24 month period. Upgrader module fabrication is largely complete and over 95% of the modules are on site. Construction of the upgrader is approximately 80% complete and start up is scheduled for late 2007. Production capacity for the first phase of Long Lake is approximately 60,000 bbls/d (30,000 bbls/d net to Nexen) of premium synthetic crude which we expect to reach by late 2008 or early 2009.

We are planning to increase synthetic crude oil production to 240,000 bbls/d (120,000 bbls/d net) over the next decade. We plan to sequentially develop our five billion barrel recoverable resource with additional 60,000 bbls/d (30,000 bbls/d net) phases using the same technology and design as Long Lake.

Syncrude

At Syncrude, we invested $86 million in 2006 and added 13 mmboe of proved reserves. The Stage 3 expansion was completed in May 2006, and has increased our share of production capacity to approximately 25,000 bbls/d.

Coalbed Methane (CBM)

In Canada, we are developing the first commercial CBM project in Mannville coals. To date, we have recognized 39 mmboe of proved plus probable reserves. In 2006, we invested $237 million in exploration and development activities on our CBM lands, of which $181 million was associated with development. This resulted in the addition of seven mmboe of proved reserves. Mannville CBM is a new play type in Western Canada with no direct analogies. Our ability to recognize proved reserves is limited until we have sufficient production history to assess long-term decline rates. We expect our CBM reserves to grow significantly over the coming years as additional wells are drilled, development work progresses and more production history is obtained.

Offshore West Africa

On Block OPL-222, offshore West Africa, Nigerian authorities have provisionally approved the Usan Field Development Plan. Basic engineering of the facilities is complete and tendering of contracts for all major components is proceeding. The development plan includes a floating production, storage and offloading vessel with a storage capacity of two million barrels, capable of handling peak production rates of 160,000 bbls/d of oil. We expect the Usan development to be formally sanctioned in 2007, with first production as early as 2010. We have a 20% interest in exploration and development on this block.

Investment in Exploration

We invested approximately $620 million in exploration in 2006. This resulted in exploration success in the Gulf of Mexico at Alaminos Canyon Block 856 and Ringo, and at Golden Eagle in the UK North Sea. Approximately $323 million of this capital was invested in land, seismic and other early stage exploration activities. The balance was invested to drill 20 high-impact exploration wells. This added four mmboe of proved reserves and 57 mmboe of probable reserves. We expect to recognize additional proved reserves from these successes as we progress appraisal work and sanction commercial developments.

We have a 50% operated working interest at our Ringo discovery in the Gulf of Mexico and are evaluating a sub-sea tieback to nearby facilities which could be on stream in late 2008. Our current estimate of the recoverable resource is between 60 and 170 bcf (gross).

At Knotty Head, we completed drilling a sidetrack well in March of last year. Our current estimate of resource for the field is between 200 and 500 mmboe. Access to rigs remains limited in the Gulf and we continue to work with partners to find a rig to complete the appraisal of the field.

We are proceeding with the development of Wrigley on Mississippi Canyon Block 506. We have completed and tested the well at 62 mmcf/d and plan to use a sub-sea tieback to nearby existing infrastructure to initiate first production late in the first quarter of 2007. We have a 50% non-operated interest in Wrigley.

We recently completed drilling operations at our Golden Eagle prospect on License P928 in the UK North Sea. The discovery well was drilled to a depth of approximately 7,500 feet and encountered 123 feet of net pay. The well tested at over 4,000 bbls/d of light crude. A successful sidetrack well was drilled to appraise the accumulation and we are currently evaluating development options. We have a 34% operated interest in Golden Eagle.

In 2006, we participated in the Norwegian exploration bid round and were recently awarded four licenses. The licenses are in water depths from 1,000 to 1,300 feet and are located between 30 and 100 miles offshore, situated close to existing infrastructure. In 2007, we plan to invest in additional seismic and geological studies in this region.

Investment in Core Asset Development

Our investment in our maturing assets is directed at extracting maximum value over the remaining life of our assets. In 2006, we invested $748 million

in our core assets. Approximately $537 million of this investment converted 26 mmboe of proved undeveloped and proved non-producing reserves to proved developed reserves. The remaining $211 million added approximately eight mmboe of new proved reserves.

In the Gulf of Mexico, we began producing from an additional development well at Aspen in late December. Based on results from this well, we see further opportunities in the Aspen field and are currently sidetracking the Aspen 1 well to exploit deeper sands. In 2007, we expect production from the Aspen field to average between 15,000 and 20,000 boe/d. We have a 100% working interest at Aspen.

Two-for-One Share Split

The Board of Directors has approved a two-for-one share split of Nexen's issued and outstanding shares, subject to shareholder and regulatory approval.

"Since our last share split in May 2005, our share price has more than doubled," said Fischer. "With Buzzard on stream and Long Lake nearing completion, we are entering a period of significant growth and are optimistic about the future of our company."

Shareholder approval will be sought at our Annual Meeting scheduled for April 26, 2007.

Quarterly Dividend

The Board of Directors has declared the regular quarterly dividend of $0.05 per common share payable April 1, 2007, to shareholders of record on March 10, 2007.

Nexen Inc. is an independent, Canadian-based global energy company, listed on the Toronto and New York stock exchanges under the symbol NXY. We are uniquely positioned for growth in the North Sea, deep-water Gulf of Mexico, the Athabasca oil sands of Alberta, the Middle East and offshore West Africa. We add value for shareholders through successful full-cycle oil and gas exploration and development and leadership in ethics, integrity and environmental protection.

Conference Call

Charlie Fischer, President and CEO, and Marvin Romanow, Executive Vice-President and CFO, will host a conference call to discuss our financial and operating results and expectations for the future.


Date: February 15, 2007
Time: 7:00 a.m. Mountain Time (9:00 a.m. Eastern Time)

To listen to the conference call, please call one of the following:

416-695-9757 (Toronto)
877-888-4210 (North American toll-free)
800-4222-8835 (Global toll-free)

A replay of the call will be available for two weeks starting at 9:00 a.m. Mountain Time, by calling 416-695-5275 (Toronto) or 888-509-0081 (toll-free) passcode 639608 followed by the pound sign.

A live and on demand webcast of the conference call will be available at www.nexeninc.com.

Forward-Looking Statements

Certain statements in this report constitute "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995, Section 21E of the United States Securities Exchange Act of 1934, as amended, and Section 27A of the United States Securities Act of 1933, as amended. Such statements are generally identifiable by the terminology used such as "intend", "plan", "expect", "estimate", "budget", "outlook" or other similar words, and include statements relating to future production associated with our Coalbed Methane, Aspen, Long Lake, Syncrude, North Sea, West Africa and other projects.

The forward-looking statements are subject to known and unknown risks and uncertainties and other factors which may cause actual results, levels of activity and achievements to differ materially from those expressed or implied by such statements. Such factors include, among others: market prices for oil and gas and chemicals products; the ability to explore, develop, produce and transport crude oil and natural gas to markets; the results of exploration and development drilling and related activities; foreign-currency exchange rates; economic conditions in the countries and regions where Nexen carries on business; actions by governmental authorities including increases in taxes or royalties, changes in environmental and other laws and regulations; renegotiations of contracts; results of litigation, arbitration or regulatory proceedings; and political uncertainty, including actions by terrorists, insurgent or other groups, or other armed conflict, including conflict between states. The impact of any one factor on a particular forward-looking statement is not determinable with certainty as such factors are interdependent upon other factors, and management's course of action would depend on its assessment of the future considering all information then available. Any statements as to possible future prices, future production levels, future cost recovery oil revenues from our Yemen operations, future capital expenditures and their allocation to exploration and development activities, future asset dispositions, future sources of funding for our capital program, future debt levels, future cash flows, future drilling of new wells, ultimate recoverability of reserves, expected finding and development costs, expected operating costs, future demand for chemicals products, future expenditures and future allowances relating to environmental matters and dates by which certain areas will be developed or will come on stream, and changes in any of the foregoing are forward-looking statements.

Although we believe that the expectations conveyed by the forward-looking statements are reasonable based on information available to us on the date such forward-looking statements were made, no assurances can be given as to future results, levels of activity and achievements. Readers should also refer to Items 7 and 7A in our 2005 Annual Report on Form 10-K for further discussion of the risk factors.

Cautionary Note to US Investors - The United States Securities and Exchange Commission (SEC) permits oil and gas companies, in their filings with the SEC, to discuss only proved reserves that are supported by actual production or conclusive formation tests to be economically and legally producible under existing economic and operating conditions. In this press release, we may refer to "recoverable reserves", "probable reserves" and "recoverable resources" which are inherently more uncertain than proved reserves. These terms are not used in our filings with the SEC. Our reserves and related performance measures represent our working interest before royalties, unless otherwise indicated. Please refer to our Annual Report on Form 10-K available from us or the SEC for further reserve disclosure.

In addition, under SEC regulations, the Syncrude oil sands operations are considered mining activities rather than oil and gas activities. Production, reserves and related measures in this release include results from the Company's share of Syncrude.

Cautionary Note to Canadian Investors - Nexen is required to disclose oil and gas activities under National Instrument 51-101- Standards of Disclosure for Oil and Gas Activities (NI 51-101). However, the Canadian securities regulatory authorities (CSA) have granted us exemptions from certain provisions of NI 51-101 to permit US style disclosure. These exemptions were sought because we are a US Securities and Exchange Commission (SEC) Registrant and our securities regulatory disclosures, including Form 10-K and other related forms, must comply with SEC requirements. Our disclosures may differ from those Canadian companies who have not received similar exemptions under NI 51-101.

Please read the "Special Note to Canadian Investors" in Item 7A in our 2005 Annual Report on Form 10-K, for a summary of the exemption granted by the CSA and the major differences between SEC requirements and NI 51-101. The summary is not intended to be all-inclusive or to convey specific advice. Reserve estimation is highly technical and requires professional collaboration and judgment. The differences between SEC requirements and NI 51-101 may be material.

Our probable reserves disclosure applies the Society of Petroleum Engineers/World Petroleum Council (SPE/WPC) definition for probable reserves. The Canadian Oil and Gas Evaluation Handbook states there should not be a significant difference in estimated probable reserve quantities using the SPE/WPC definition versus NI 51-101.

In this press release, we refer to oil and gas in common units called barrel of oil equivalent (boe). A boe is derived by converting six thousand cubic feet of gas to one barrel of oil (6mcf:1bbl). This conversion may be misleading, particularly if used in isolation, since the 6mcf:1bbl ratio is based on an energy equivalency at the burner tip and does not represent the value equivalency at the well head.


Nexen Inc.
Financial Highlights (1)
                                         Three Months        Twelve Months
                                    Ended December 31    Ended December 31
(Cdn$ millions)                        2006      2005       2006      2005
---------------------------------------------------------------------------
Net Sales (2)                           920     1,073      3,936     4,086
Cash Flow from Operations (2)           673       772      2,669     2,403
 Per Common Share ($/share)            2.56      2.96      10.18      9.23
Net Income (2)                           77       303        601     1,140
 Per Common Share ($/share)            0.29      1.16       2.29      4.38
Capital Expenditures (3)                951       731      3,458     2,691
Net Debt (4)                          4,730     3,639      4,730     3,639
Common Shares Outstanding (millions
 of shares)                           262.5     261.1      262.5     261.1
                                    ---------------------------------------

(1) Certain prior year comparative numbers have been restated to reflect
    a change in accounting principles as discussed in Note 1 to our
    Unaudited Consolidated Financial Statements.
(2) 2005 includes discontinued operations as discussed in Note 16 to our
    Unaudited Consolidated Financial Statements.
(3) Includes oil and gas development, exploration, and expenditures for
    other property, plant and equipment.
(4) Net debt is defined as long-term debt and short-term borrowings less
    cash and cash equivalents.


Cash Flow from Operations (1)(2)

                                         Three Months        Twelve Months
                                    Ended December 31    Ended December 31
(Cdn$ millions)                        2006      2005       2006      2005
---------------------------------------------------------------------------
Oil & Gas and Syncrude
 Yemen (3)                              189       236        877       929
 Canada (4)                              41        88        229       397
 United States                          127       164        573       667
 United Kingdom                          92       117        477       284
 Other Countries                         19        10         94        48
 Marketing                              147       186        432       138
 Syncrude                                65        54        240       223
                                    ---------------------------------------
                                        680       855      2,922     2,686
Chemicals                                17        25         83        95
                                    ---------------------------------------
                                        697       880      3,005     2,781
Interest and Other Corporate Items      (75)      (98)      (254)     (335)
Income Taxes (5)                         51       (10)       (82)      (43)
                                    ---------------------------------------
Cash Flow from Operations (1)           673       772      2,669     2,403
                                    ---------------------------------------
                                    ---------------------------------------

(1) Defined as cash flow from operating activities before changes in
    non-cash working capital and other. We evaluate our performance and
    that of our business segments based on earnings and cash flow from
    operations. Cash flow from operations is a non-GAAP term that
    represents cash generated from operating activities before changes
    in non-cash working capital and other and excludes items of a
    non-recurring nature. We consider it a key measure as it demonstrates
    our ability and the ability of our business segments to generate the
    cash flow necessary to fund future growth through capital investment
    and repay debt. Cash flow from operations may not be comparable with
    the calculation of similar measures for other companies.


Reconciliation of Cash Flow              Three Months        Twelve Months
from Operations                     Ended December 31    Ended December 31

(Cdn$ millions)                        2006      2005       2006      2005
---------------------------------------------------------------------------
Cash Flow from Operating Activities     590       468      2,374     2,143
Changes in Non-Cash Working Capital      85       315        177       195
Other                                    (2)        6         41       133
Amortization of Premium for Crude Oil
 Put Options                            (17)      (17)       (74)      (68)
Provision for Non-Recurring
 Arbitration                             17         -        151         -
                                    ---------------------------------------
Cash Flow from Operations               673       772      2,669     2,403
                                    ---------------------------------------
                                    ---------------------------------------
Weighted-average Number of Common
 Shares Outstanding (millions of
  shares)                             262.5     261.0      262.1     260.4
                                    ---------------------------------------
Cash Flow from Operations Per Common
 Share ($/share)                       2.56      2.96      10.18      9.23
                                    ---------------------------------------
                                    ---------------------------------------

(2) Certain prior year comparative numbers have been restated to reflect a
    change in accounting principles.
(3) After in-country cash taxes of $62 million for the three months ended
    December 31, 2006 (2005 - $74 million) and $286 million for the twelve
    months ended December 31, 2006 (2005 - $296 million).
(4) 2005 includes discontinued operations as discussed in Note 16 to our
    Unaudited Consolidated Financial Statements.
(5) Excludes in-country cash taxes in Yemen.


Production Volumes (before royalties) (1)

                                         Three Months        Twelve Months
                                    Ended December 31    Ended December 31
                                       2006      2005       2006      2005
---------------------------------------------------------------------------
Crude Oil and NGLs (mbbls/d)
  Yemen                                83.7     107.7       92.9     112.7
  Canada (2)                           18.3      21.7       20.0      29.2
  United States                        14.6      18.9       17.0      22.2
  United Kingdom                       21.6      16.2       16.9      12.6
  Other Countries                       6.0       5.4        6.3       5.6
 Syncrude (3) (mbbls/d)                21.9      16.3       18.7      15.5
                                    ---------------------------------------
                                      166.1     186.2      171.8     197.8
                                    ---------------------------------------
Natural Gas (mmcf/d)
  Canada (2)                            118       102        108       124
  United States                         111        98        111       116
  United Kingdom                         14        33         20        23
                                    ---------------------------------------
                                        243       233        239       263
                                    ---------------------------------------

Total Production (mboe/d)               207       225        212       242
                                    ---------------------------------------
                                    ---------------------------------------



Production Volumes (after royalties)

                                         Three Months        Twelve Months
                                    Ended December 31    Ended December 31
                                       2006      2005       2006      2005
---------------------------------------------------------------------------
Crude Oil and NGLs (mbbls/d)
  Yemen                                51.9      59.9       51.8      60.6
  Canada (2)                           14.5      16.8       15.8      22.6
  United States                        12.8      16.7       15.0      19.6
  United Kingdom                       21.6      16.2       16.9      12.6
  Other Countries                       5.5       5.0        5.7       5.1
 Syncrude (3) (mbbls/d)                20.2      16.2       16.9      15.3
                                    ---------------------------------------
                                      126.5     130.8      122.1     135.8
                                    ---------------------------------------
Natural Gas (mmcf/d)
  Canada (2)                             98        87         91       101
  United States                          94        83         94        99
  United Kingdom                         14        33         20        23
                                    ---------------------------------------
                                        206       203        205       223

                                    ---------------------------------------

Total Production (mboe/d)               161       165        156       173
                                    ---------------------------------------
                                    ---------------------------------------
Notes:
(1) We have presented production volumes before royalties as we measure our
    performance on this basis consistent with other Canadian oil and gas
    companies.
(2) Includes the following production from discontinued operations. See
    Note 16 to our Unaudited Consolidated Financial Statements.


                                                             Twelve Months
                                                         Ended December 31
                                                            2006      2005
---------------------------------------------------------------------------
Before Royalties
 Crude Oil and NGLs (mbbls/d)                                  -       6.7
 Natural Gas (mmcf/d)                                          -        24
After Royalties
 Crude Oil and NGLs (mbbls/d)                                  -       5.3
 Natural Gas (mmcf/d)                                          -        17
                                                         ------------------

(3) Considered a mining operation for US reporting purposes.


Nexen Inc.
Oil and Gas Prices and Cash Netback (1)

                                        Total                         Total
(all dollar          Quarters - 2006     Year        Quarters - 2005   Year
 amounts in Cdn$ ----------------------------------------------------------
 unless noted)    1st   2nd   3rd   4th  2006   1st   2nd   3rd   4th  2005
---------------------------------------------------------------------------
PRICES:
WTI Crude Oil
 (US$/bbl)      63.48 70.70 70.48 60.21 66.22 49.85 53.17 63.52 59.78 56.58
Nexen Average
 - Oil
 (Cdn$/bbl)     63.11 72.90 73.06 60.89 67.50 51.33 55.45 68.99 60.89 58.98
NYMEX Natural
 Gas (US$/mmbtu) 7.87  6.67  6.14  7.26  6.99  6.48  6.95  9.69 12.86  8.99
Nexen Average
 - Gas
 (Cdn$/mcf)      8.71  6.68  6.39  6.84  7.18  6.98  7.39  9.68 12.18  8.89
---------------------------------------------------------------------------

NETBACKS:
Canada - Light
 Oil and NGLs
Sales (mbbls/d)     -     -     -     -     -  11.5  12.0   4.7     -   7.1

Price Received
 ($/bbl)            -     -     -     -     - 55.37 58.06 67.04     - 58.55
Royalties &
 Other              -     -     -     -     - 12.08 10.98 14.75     - 12.69
Operating Costs     -     -     -     -     -  9.77  6.29  6.45     -  7.97
---------------------------------------------------------------------------
Netback             -     -     -     -     - 33.52 40.79 45.84     - 37.89
---------------------------------------------------------------------------
Canada - Heavy Oil
Sales (mbbls/d)  21.9  20.1  19.0  18.3  19.8  22.7  22.1  21.2  21.1  21.8

Price Received
 ($/bbl)        30.00 51.67 52.95 37.61 42.79 26.15 30.87 47.53 34.41 34.62
Royalties &
 Other           6.25 11.38 12.55  8.43  9.58  6.05  8.47 11.80  7.96  8.17
Operating Costs 11.47 11.66 12.61 12.98 12.15 10.55 10.86 11.42 12.55 10.40
---------------------------------------------------------------------------
Netback         12.28 28.63 27.79 16.20 21.06  9.55 11.54 24.31 13.90 16.05
---------------------------------------------------------------------------
Canada - Total Oil
Sales (mbbls/d)  21.9  20.1  19.0  18.3  19.8  34.2  34.1  25.9  21.1  28.9

Price Received
 ($/bbl)        30.00 51.67 52.95 37.61 42.79 35.99 40.47 51.05 34.41 40.51
Royalties &
 Other           6.25 11.38 12.55  8.43  9.58  8.12  9.39 12.39  7.96  9.28
Operating Costs 11.47 11.66 12.61 12.98 12.15 10.29  9.25 10.53 12.55  9.80
---------------------------------------------------------------------------
Netback         12.28 28.63 27.79 16.20 21.06 17.58 21.83 28.13 13.90 21.43
---------------------------------------------------------------------------
Canada -
 Natural Gas
Sales (mmcf/d)    106   104   106   118   108   143   141   111   102   124

Price Received
 ($/mcf)         7.65  6.21  5.78  6.37  6.49  5.80  6.30  8.19 10.75  7.51
Royalties &
 Other           1.17  0.89  0.90  0.98  0.97  1.17  1.21  1.26  1.63  1.33
Operating Costs  1.27  1.33  1.33  1.64  1.38  0.71  0.74  0.80  1.21  1.00
---------------------------------------------------------------------------
Netback          5.21  3.99  3.55  3.75  4.14  3.92  4.35  6.13  7.91  5.18
---------------------------------------------------------------------------
Yemen
Sales (mbbls/d) 102.6  94.5  88.8  85.1  92.7 115.0 112.6 116.8 108.3 113.2

Price Received
 ($/bbl)        68.32 76.86 76.08 64.90 71.57 54.38 58.08 72.04 63.39 62.07
Royalties &
 Other          32.73 34.60 34.80 26.76 32.32 27.08 26.30 33.20 28.06 28.71
Operating Costs  3.88  4.39  4.53  5.11  4.45  3.33  3.72  3.46  4.03  3.63
In-country
 Taxes           7.20  9.46  9.29  7.94  8.45  5.67  6.91  8.61  7.47  7.17
---------------------------------------------------------------------------
Netback         24.51 28.41 27.46 25.09 26.35 18.30 21.15 26.77 23.83 22.56
---------------------------------------------------------------------------
Syncrude
Sales (mbbls/d)  14.8  17.4  20.5  21.9  18.7  11.4  16.9  17.2  16.3  15.5

Price Received
 ($/bbl)        69.95 79.50 77.53 63.37 72.32 65.15 66.93 78.93 70.79 71.00
Royalties &
 Other           6.68  7.95  8.54  4.79  6.93  0.65  0.65  0.78  0.72  0.71
Operating Costs 40.12 27.84 21.69 24.42 27.53 39.91 20.76 23.22 28.36 26.95
---------------------------------------------------------------------------
Netback         23.15 43.71 47.30 34.16 37.86 24.59 45.52 54.93 41.71 43.34
---------------------------------------------------------------------------
United States
Crude Oil:
 Sales (mbbls/d) 19.3  17.8  16.7  14.6  17.0  28.5  23.0  18.4  18.9  22.2
 Price Received
  ($/bbl)       63.73 70.23 70.23 58.09 65.80 50.90 54.96 68.30 60.32 57.63
Natural Gas:
 Sales (mmcf/d)   120   107   105   111   111   127   120   122    98   116
 Price Received
  ($/mcf)        9.06  7.51  7.18  7.56  7.86  8.32  9.01 11.57 13.95 10.56
Total Sales
 Volume (mboe/d) 39.3  35.6  34.1  33.0  35.5  49.6  43.0  38.7  35.2  41.6

Price Received
 ($/boe)        58.97 57.60 56.35 50.97 56.12 50.48 54.54 68.91 71.14 60.26
Royalties &
 Other           7.96  7.62  7.42  7.06  7.53  6.48  7.31  9.60  9.47  8.06
Operating Costs  8.47  7.00  8.42  8.78  8.17  4.91  5.70  6.95  8.47  6.35
---------------------------------------------------------------------------
Netback         42.54 42.98 40.51 35.13 40.42 39.09 41.53 52.36 53.20 45.85
---------------------------------------------------------------------------
United Kingdom
Crude Oil:
 Sales (mbbls/d) 17.6  17.9  13.8  16.2  16.3  17.5  11.7  10.4  15.6  13.8
 Price Received
  ($/bbl)       69.02 73.24 77.73 65.67 71.19 54.53 59.02 65.87 64.75 60.55
Natural Gas:
 Sales (mmcf/d)    24    29    10    15    19    26    15    13    30    21
 Price Received
  ($/mcf)       11.82  5.52  5.57  5.52  7.43  6.92  5.45  4.84 11.26  7.86
Total Sales
 Volume (mboe/d) 21.5  22.8  15.4  18.6  19.6  21.9  14.3  12.6  20.6  17.3

Price Received
 ($/boe)        69.37 64.59 73.13 61.38 66.81 51.92 54.31 59.39 65.42 57.83
Royalties &
 Other              -     -     -     -     -     -     -     -     -     -
Operating Costs 11.24  9.59 15.12 10.18 11.28 12.59 21.69 19.30  9.95 14.90
---------------------------------------------------------------------------
Netback         58.13 55.00 58.01 51.20 55.53 39.33 32.62 40.09 55.47 42.93
---------------------------------------------------------------------------
Other Countries
Sales (mbbls/d)   5.8   6.6   6.7   6.0   6.3   5.6   6.2   5.3   6.3   5.9

Price Received
 ($/bbl)        58.81 69.63 74.05 60.22 66.09 46.63 53.70 65.82 72.75 59.96
Royalties &
 Other           4.71  5.92  6.33  4.89  5.51  3.68  6.01  5.07  5.96  5.23
Operating Costs  2.27  2.74  2.55  3.93  2.87  2.32  9.27  3.20  7.03  5.55
---------------------------------------------------------------------------
Netback         51.83 60.97 65.17 51.40 57.71 40.63 38.42 57.55 59.76 49.18
---------------------------------------------------------------------------

Company-Wide
Oil and Gas
 Sales (mboe/d) 223.5 214.5 202.1 202.6 210.6 261.6 250.4 235.2 225.2 243.0

Price Received
 ($/boe)        61.11 66.78 66.82 56.95 62.92 49.55 53.45 67.09 62.97 57.97
Royalties &
 Other          18.04 18.95 19.25 14.38 17.68 14.94 15.22 20.21 16.66 16.70
Operating Costs  8.78  8.21  8.72  9.40  8.77  6.94  7.18  7.21  8.18  7.36
In-country
 Taxes           3.31  4.17  4.08  3.33  3.72  2.49  3.10  4.28  3.59  3.34
---------------------------------------------------------------------------
Netback         30.98 35.45 34.77 29.84 32.75 25.18 27.95 35.39 34.54 30.57
---------------------------------------------------------------------------

(1) Defined as average sales price less royalties and other, operating
    costs, and in-country taxes in Yemen.


Nexen Inc.
Unaudited Consolidated Statement of Income
For the Three and Twelve Months Ended December 31
Cdn$ millions, except per share amounts

                                              Three Months   Twelve Months
                                                     Ended           Ended
                                               December 31     December 31
                                              2006    2005    2006    2005
---------------------------------------------------------------------------
                                                    Note 1          Note 1
Revenues and Other Income
 Net Sales                                     920   1,073   3,936   3,932
 Marketing and Other (Note 15)                 361     372   1,450     702
 Gain on Dilution of Interest in Chemicals
  Business (Note 2)                              -       -       -     193

                                            -------------------------------
                                             1,281   1,445   5,386   4,827
                                            -------------------------------
Expenses
 Operating                                     253     243     955     893
 Depreciation, Depletion, Amortization and
  Impairment                                   354     304   1,124   1,052
 Transportation and Other                      245     226   1,041     796
 General and Administrative                    176     140     555     809
 Exploration                                   131      86     362     250
 Interest (Note 8)                              18      13      53      97
                                            -------------------------------
                                             1,177   1,012   4,090   3,897
                                            -------------------------------

Income from Continuing Operations before
 Income Taxes                                  104     433   1,296     930
                                            -------------------------------

Provision for Income Taxes
 Current                                        11      84     368     339
 Future (Note 19)                               16      43     315    (105)
                                            -------------------------------
                                                27     127     683     234
                                            -------------------------------

Net Income from Continuing Operations
 before Non-Controlling Interests               77     306     613     696
 Net Income Attributable to Non-Controlling
  Interests                                      -       3      12       8
                                            -------------------------------

Net Income from Continuing Operations           77     303     601     688
 Net Income from Discontinued Operations
  (Note 16)                                      -       -       -     452
                                            -------------------------------

Net Income                                      77     303     601   1,140
                                            -------------------------------
                                            -------------------------------

Earnings Per Common Share from Continuing
 Operations ($/share)
 Basic (Note 13)                              0.29    1.16    2.29    2.64
                                            -------------------------------
                                            -------------------------------

 Diluted (Note 13)                            0.29    1.13    2.24    2.58
                                            -------------------------------
                                            -------------------------------

Earnings Per Common Share ($/share)
 Basic (Note 13)                              0.29    1.16    2.29    4.38
                                            -------------------------------
                                            -------------------------------

 Diluted (Note 13)                            0.29    1.13    2.24    4.28
                                            -------------------------------
                                            -------------------------------

See accompanying notes to the Unaudited Consolidated Financial Statements.


Nexen Inc.
Unaudited Consolidated Balance Sheet
Cdn$ millions, except share amounts

                                               December 31     December 31
                                                      2006            2005
---------------------------------------------------------------------------
Assets                                                              Note 1
 Current Assets
  Cash and Cash Equivalents                            101              48
  Restricted Cash and Margin Deposits                  197              70
  Accounts Receivable (Note 4)                       2,951           3,151
  Inventories and Supplies (Note 5)                    786             504
  Future Income Tax Assets                             479               -
  Other                                                 67              51
                                            -------------------------------
   Total Current Assets                              4,581           3,824
                                            -------------------------------

 Property, Plant and Equipment (Note 7)
  Net of Accumulated Depreciation, Depletion,
   Amortization and Impairment of $6,399
   (December 31, 2005 - $5,468)                     11,739           9,594
 Goodwill                                              377             364
 Future Income Tax Assets                              141             410
 Deferred Charges and Other Assets (Note 6)            318             398
                                            -------------------------------
                                                    17,156          14,590
                                            -------------------------------
                                            -------------------------------

Liabilities and Shareholders' Equity
 Current Liabilities
  Short-Term Borrowings (Note 8)                       158               -
  Accounts Payable and Accrued Liabilities           3,879           3,727
  Accrued Interest Payable                              55              55
  Dividends Payable                                     13              13
                                            -------------------------------
   Total Current Liabilities                         4,105           3,795
                                            -------------------------------

 Long-Term Debt (Note 8)                             4,673           3,687
 Future Income Tax Liabilities                       2,468           1,955
 Asset Retirement Obligations (Note 9)                 683             590
 Deferred Credits and Other Liabilities
  (Note 10)                                            516             479
 Non-Controlling Interests (Note 2)                     75              88
 Shareholders' Equity (Note 12)
  Common Shares, no par value
   Authorized:     Unlimited
   Outstanding:    2006 - 262,513,206 shares
                   2005 - 261,140,571 shares           821             732
  Contributed Surplus                                    4               2
  Retained Earnings                                  3,972           3,423
  Cumulative Foreign Currency Translation
   Adjustment                                         (161)           (161)
                                            -------------------------------
   Total Shareholders' Equity                        4,636           3,996
                                            -------------------------------

Commitments, Contingencies and Guarantees
 (Note 17)
                                                    17,156          14,590
                                            -------------------------------
                                            -------------------------------

See accompanying notes to the Unaudited Consolidated Financial Statements.


Nexen Inc.
Unaudited Consolidated Statement of Cash Flows
For the Three and Twelve Months Ended December 31
Cdn$ millions

                                              Three Months   Twelve Months
                                                     Ended           Ended
                                               December 31     December 31
                                              2006    2005    2006    2005
---------------------------------------------------------------------------
                                                    Note 1          Note 1
Operating Activities
 Net Income from Continuing Operations          77     303     601     688
 Net Income from Discontinued Operations         -       -       -     452
 Charges and Credits to Income not Involving
  Cash (Note 14)                               465     400   1,629   1,081
 Exploration Expense                           131      86     362     250
 Changes in Non-Cash Working Capital (Note 14) (85)   (315)   (177)   (195)
 Other                                           2      (6)    (41)   (133)
                                            -------------------------------
                                               590     468   2,374   2,143

Financing Activities
 Proceeds from (Repayment of) Term Credit
  Facilities, Net                              493       1   1,044     (66)
 Proceeds from Long-Term Notes and Debentures    -       -       -   1,253
 Repayment of Long-Term Notes and Debentures
  (Note 8)                                     (93)      -     (93) (1,818)
 Proceeds from (Repayment of) Short-Term
  Borrowings, Net                               38       -     160     (99)
 Dividends on Common Shares                    (13)    (13)    (52)    (52)
 Issue of Common Shares and Exercise of
  Options for Shares                             7       7      48      58
 Net Proceeds from Canexus Initial Public
  Offering (Note 2)                              -       -       -     301
 Proceeds from Term Credit Facilities of
  Canexus, Net (Note 2)                         (2)      3       2     176
 Other                                          (7)      8     (28)    (27)
                                            -------------------------------
                                               423       6   1,081    (274)

Investing Activities
 Business Acquisition, Net of Cash Acquired
  (Note 3)                                       -       -     (78)      -
 Capital Expenditures
  Exploration and Development                 (868)   (694) (3,198) (2,564)
  Proved Property Acquisitions                  (1)      -     (13)    (20)
  Chemicals, Corporate and Other               (31)    (21)   (119)    (54)

 Proceeds on Disposition of Assets               2       -      27     911
 Changes in Non-Cash Working Capital
  (Note 14)                                     19       -     134     (54)
 Changes in Restricted Cash and Margin
  Deposits                                     (87)    140    (127)    (70)
 Other                                           8     (20)    (14)    (13)
                                            -------------------------------
                                              (958)   (595) (3,388) (1,864)

Effect of Exchange Rate Changes on Cash and
 Cash Equivalents                               15     (31)    (14)    (30)
                                            -------------------------------

Increase (Decrease) in Cash and Cash
 Equivalents                                    70    (152)     53     (25)

Cash and Cash Equivalents - Beginning of
 Period                                         31     200      48      73
                                            -------------------------------

Cash and Cash Equivalents - End of Period      101      48     101      48
                                            -------------------------------
                                            -------------------------------


See accompanying notes to the Unaudited Consolidated Financial Statements.


Nexen Inc.
Unaudited Consolidated Statement of Shareholders' Equity
For the Three and Twelve Months Ended December 31
Cdn$ millions

                                              Three Months   Twelve Months
                                                     Ended           Ended
                                               December 31     December 31
                                              2006    2005    2006    2005
---------------------------------------------------------------------------
                                                    Note 1          Note 1
Common Shares
 Balance at Beginning of Period                809     719     732     637
 Issue of Common Shares                          4       5      32      29
 Proceeds from Options Exercised for Shares      3       2      16      29
 Accrued Liability Relating to Options
  Exercised                                      5       6      41      37
                                            -------------------------------
 Balance at End of Period                      821     732     821     732
                                            -------------------------------
                                            -------------------------------

Contributed Surplus
 Balance at Beginning of Period                  3       1       2       -
 Stock-Based Compensation Expense                1       1       2       2
                                            -------------------------------
 Balance at End of Period                        4       2       4       2
                                            -------------------------------
                                            -------------------------------

Retained Earnings
 Balance at Beginning of Period              3,908   3,133   3,423   2,335
 Net Income                                     77     303     601   1,140
 Dividends on Common Shares                    (13)    (13)    (52)    (52)
                                            -------------------------------
 Balance at End of Period                    3,972   3,423   3,972   3,423
                                            -------------------------------
                                            -------------------------------

Cumulative Foreign Currency Translation
 Adjustment
 Balance at Beginning of Period               (232)   (183)   (161)   (105)
 Translation Adjustment, Net of Income Taxes    71      22       -     (56)
                                            -------------------------------
 Balance at End of Period                     (161)   (161)   (161)   (161)
                                            -------------------------------
                                            -------------------------------

See accompanying notes to the Unaudited Consolidated Financial Statements.

Nexen Inc.

Notes to Unaudited Consolidated Financial Statements

Cdn$ millions, except as noted

1. ACCOUNTING POLICIES

Our Unaudited Consolidated Financial Statements are prepared in accordance with Canadian Generally Accepted Accounting Principles (GAAP). In the opinion of management, the Unaudited Consolidated Financial Statements contain all adjustments of a normal and recurring nature necessary to present fairly Nexen Inc.'s (Nexen, we or our) financial position at December 31, 2006 and the results of our operations and our cash flows for the three and twelve months ended December 31, 2006 and 2005.

We make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the Unaudited Consolidated Financial Statements, and revenues and expenses during the reporting period. Our management reviews these estimates, including those related to accruals, litigation, environmental and asset retirement obligations, income taxes, derivative contract assets and liabilities and determination of proved reserves, on an ongoing basis. Changes in facts and circumstances may result in revised estimates and actual results may differ from these estimates.

The note disclosure requirements for annual consolidated financial statements provide additional disclosure to that required for interim consolidated financial statements. Accordingly, these Unaudited Consolidated Financial Statements should be read in conjunction with our Audited Consolidated Financial Statements included in our 2005 Annual Report on Form 10-K. The accounting policies we follow are described in Note 1 of the Audited Consolidated Financial Statements included in our 2005 Annual Report on Form 10-K.

Changes in Accounting Principles

Stock-Based Compensation for Employees Eligible to Retire Before the Vesting Date

In the fourth quarter of 2006, we retroactively adopted EIC-162, Stock-Based Compensation for Employees Eligible to Retire Before the Vesting Date (EIC-162). EIC-162 provides that if an employee is eligible to retire on the grant date of a stock-based award, related compensation expense is recognized in full at that date as there is no ongoing service requirement to earn the award. In addition, if an employee becomes eligible to retire during the vesting period, related compensation expense is recognized over the period from the grant date to the retirement eligibility date on a graded vesting basis. Prior to the adoption of EIC-162, we did not consider the retirement dates of our employees in the determination of our stock-based compensation expense. EIC-162 is effective for interim and annual periods ending on or after December 31, 2006 and is to be adopted on a retroactive basis. For the three and twelve months ended December 31, 2006 and 2005, the impact of adopting EIC-162 increased/ (decreased) the following:


                                         Three Months        Twelve Months
                                    Ended December 31    Ended December 31
                                     2006        2005     2006        2005
---------------------------------------------------------------------------
General and Administrative Expense     (3)         (5)      (9)         17
Provision for Future Income Taxes       1           2        3          (5)
Net Income                              2           3        6         (12)
Basic Earnings Per Share
 ($/share)                           0.01        0.01     0.02       (0.05)
Diluted Earnings Per Share
 ($/share)                           0.01        0.01     0.02       (0.05)
                                   ----------------------------------------

2. CANEXUS INCOME FUND

In June 2005, our board of directors approved a plan to monetize our chemicals operations through the creation of an income trust and the issuance of trust units in an initial public offering. This initial public offering closed on August 18, 2005, with Canexus Income Fund (Canexus) issuing 30 million units at a price of $10 per unit for gross proceeds of $300 million ($284 million, net of underwriters' commissions).

Concurrent with the closing of the offering, Canexus acquired a 36.5% interest in Canexus Limited Partnership (Canexus LP) using the net proceeds from the initial public offering. Canexus LP acquired Nexen's chemicals business for approximately $1 billion, comprised of the net proceeds from Canexus' initial public offering and $200 million (US$167 million) of bank debt, plus the issuance of 52.3 million exchangeable limited partnership units (Exchangeable LP Units) of Canexus LP. At that time, the Exchangeable LP Units held by Nexen represented a 63.5% interest in Canexus LP.

The Exchangeable LP Units held by Nexen are exchangeable on a one-for-one basis for trust units of Canexus. As a result, the Exchangeable LP Units owned by Nexen were exchangeable into 52.3 million trust units which represented 63.5% of the outstanding trust units of Canexus assuming exchange of the Exchangeable LP Units.

On September 16, 2005, the underwriters of the initial public offering exercised a portion of their over-allotment option to purchase 1.75 million trust units at $10 per unit for gross proceeds of $18 million ($17 million, net of underwriters' commissions). As a result, Nexen exchanged 1.75 million of its Exchangeable LP Units for $17 million in net proceeds. After this exchange, Nexen has a 61.4% interest in Canexus LP represented by 50.5 million Exchangeable LP Units. The initial public offering, together with the exercise of the over-allotment, resulted in total net proceeds to Nexen of $301 million.

These transactions diluted our interest in our chemicals operations. As a result of this dilution, we recorded a gain of $193 million during the third quarter of 2005.

We have the right to nominate a majority of the members of the board of Canexus Limited, the corporation with responsibility for the strategic management and operational decisions of Canexus and Canexus LP. Nexen has nominated two representatives to the 10-member board of Canexus Limited. Since we have retained effective control of our chemicals business, the results, assets and liabilities of this business have been included in these financial statements. The non-Nexen ownership interests in our chemicals business are shown as non-controlling interests.

Distributions of $7 million and $28 million were paid to non-Nexen ownership interests, during the three and twelve months ended December 31, 2006 (2005 -- $7 million and $10 million).

3. BUSINESS ACQUISITIONS

In the first half of 2006, we completed minor business acquisitions related to our marketing group for $78 million, net of cash acquired. These acquisitions were accounted for using the purchase method of accounting. The assets and liabilities purchased were primarily working capital and we recorded goodwill of $12 million as a result of the acquisitions.


4. ACCOUNTS RECEIVABLE

                                            December 31        December 31
                                                   2006               2005
---------------------------------------------------------------------------
Trade
 Marketing                                        2,226              2,400
 Oil and Gas                                        600                614
 Chemicals and Other                                 58                 48
                                              -----------------------------
                                                  2,884              3,062
Non-Trade                                            80                 96
                                              -----------------------------
                                                  2,964              3,158
Allowance for Doubtful Receivables                  (13)                (7)
                                              -----------------------------
Total                                             2,951              3,151
                                              -----------------------------
                                              -----------------------------


5. INVENTORIES AND SUPPLIES

                                            December 31        December 31
                                                   2006               2005
---------------------------------------------------------------------------
Finished Products
 Marketing                                          609                320
 Oil and Gas                                         21                 11
 Chemicals and Other                                 14                 15
                                              -----------------------------
                                                    644                346
Work in Process                                       5                  6
Field Supplies                                      137                152
                                              -----------------------------
Total                                               786                504
                                              -----------------------------
                                              -----------------------------


6. DEFERRED CHARGES AND OTHER ASSETS

                                            December 31        December 31
                                                   2006               2005
---------------------------------------------------------------------------
Long-Term Marketing Derivative
 Contracts (Note 11)                                153                232
Deferred Financing Costs                             59                 63
Asset Retirement Remediation Fund                    13                 14
Crude Oil Put Options (Note 11)                      19                  4
Other                                                74                 85
                                              -----------------------------
Total                                               318                398
                                              -----------------------------
                                              -----------------------------

7. SUSPENDED WELL COSTS

The following table shows the changes in capitalized exploratory well costs included in property, plant and equipment during the years ended December 31, 2006 and 2005, and does not include amounts that were initially capitalized and subsequently expensed in the same period.


                                                             Twelve Months
                                                         Ended December 31
                                                   2006               2005
---------------------------------------------------------------------------
Balance at Beginning of Year                        252                116
Additions to Capitalized Exploratory
 Well Costs Pending the Determination
 of Proved Reserves                                 129                174
Capitalized Exploratory Well Costs
 Charged to Expense                                 (70)               (27)
Reclasses to Wells, Facilities and
 Equipment Based on Determination
 of Proved Reserves                                 (84)                (3)
Effects of Foreign Exchange                          (1)                (8)
                                              -----------------------------
Balance at End of Year                              226                252
                                              -----------------------------
                                              -----------------------------

The following table provides an aging of capitalized exploratory well costs based on the date drilling was completed and shows the number of projects for which exploratory well costs have been capitalized for a period greater than one year after the completion of drilling.


                                            December 31        December 31
                                                   2006               2005
---------------------------------------------------------------------------
Capitalized for a Period of One
 Year or Less                                       179                165
Capitalized for a Period of
 Greater than One Year                               47                 87
                                              -----------------------------
Balance at End of Year                              226                252
                                              -----------------------------
                                              -----------------------------

Number of Projects that have Exploratory
 Well Costs Capitalized for a Period
 Greater than One Year                                4                  3
                                              -----------------------------

As at December 31, 2006, we have exploratory costs that have been capitalized for more than one year relating to our interest in an exploratory block, offshore Nigeria ($14 million), our interests in exploratory blocks in the Gulf of Mexico ($16 million), our coalbed methane exploratory activities in Canada ($10 million) and an exploratory block in the North Sea ($7 million). Our capitalized costs in Nigeria include capital spending for four successful wells. Development plans are currently being prepared for this area. We have capitalized costs related to successful wells drilled in the Gulf of Mexico and the North Sea. In Canada, we have capitalized exploratory costs relating to our coalbed methane projects. We are assessing all of these wells and projects, and we are working with our partners to prepare development plans.


8. LONG-TERM DEBT AND SHORT-TERM BORROWINGS

                                                  December 31  December 31
                                                         2006         2005
---------------------------------------------------------------------------
Term Credit Facilities (US$925 million) (c)             1,078            -
Canexus LP Term Credit Facilities (US$149 million)        174          171
Debentures, due 2006 (d)                                    -           93
Medium-Term Notes, due 2007 (1)                           150          150
Medium-Term Notes, due 2008                               125          125
Notes, due 2013 (US$500 million)                          583          583
Notes, due 2015 (US$250 million)                          291          292
Notes, due 2028 (US$200 million)                          233          233
Notes, due 2032 (US$500 million)                          583          583
Notes, due 2035 (US$790 million)                          920          921
Subordinated Debentures, due 2043 (US$460 million)        536          536
                                                  -------------------------
                                                        4,673        3,687
                                                  -------------------------
                                                  -------------------------

Notes:
(1) Amounts due July 2007 are not included in current liabilities as we
    expect to refinance this amount with our term credit facilities.


(a) Interest expense
                                  Three Months               Twelve Months
                             Ended December 31           Ended December 31
                            2006          2005        2006            2005
---------------------------------------------------------------------------
Long-Term Debt                76            63         275             260

Other                          4             3          19              15
                            -----------------------------------------------
                              80            66         294             275
 Less: Capitalized           (62)          (53)       (241)           (178)
                            -----------------------------------------------
Total                         18            13          53              97
                            -----------------------------------------------
                            -----------------------------------------------

Capitalized interest relates to and is included as part of the cost of our oil and gas and Syncrude properties. The capitalization rates are based on our weighted-average cost of borrowings.

(b) Short-term borrowings

Nexen has uncommitted, unsecured credit facilities of approximately $632 million. At December 31, 2006, $158 million (US$136 million) was drawn under these facilities (2005 - nil). We have also utilized $252 million of these facilities to support outstanding letters of credit at December 31, 2006 (2005 - $468 million). Interest is payable at floating rates. The weighted-average interest rate on our short-term borrowings was 5.8% for the three months ended December 31, 2006 (2005 - 4.4%) and 5.5% for the year ended December 31, 2006 (2005- 3.6%).

(c) Term credit facilities

We have committed, unsecured, term credit facilities of $3.6 billion, which are available until 2011. At December 31, 2006, $1,078 million (US$925 million) was drawn on these facilities (December 31, 2005 - nil). Borrowings are available as Canadian bankers' acceptances, LIBOR-based loans, Canadian prime loans, US-dollar base rate loans or British pound call-rate loans. Interest is payable monthly at floating rates. The weighted-average interest rate on our term credit facilities was 5.9% for the three months ended December 31, 2006 (2005 - 4.7%) and 5.7% for the year ended December 31, 2006 (2005 - 4.4%) . At December 31, 2006, $294 million of these facilities were utilized to support outstanding letters of credit (December 31, 2005 - $250 million).

(d) Debentures, due 2006

During November 1996, we issued $100 million of unsecured 10 year redeemable debentures. Interest was payable semi-annually at a rate of 6.85% . In December 1996, $50 million of this obligation was effectively converted through a foreign currency swap with a Canadian chartered bank to a US$37 million liability bearing interest at 6.75% for the term of the debentures. In November 2006, we repaid the outstanding debentures of $100 million and realized a gain of $7 million on the foreign currency swap.


9. ASSET RETIREMENT OBLIGATIONS

Changes in carrying amounts of the asset retirement obligations associated
 with our property, plant and equipment are as follows:

                                            December 31        December 31
                                                   2006               2005
---------------------------------------------------------------------------
Balance at Beginning of Year                        611                468
 Obligations Assumed with
  Development Activities                             75                 72
 Obligations Discharged with
  Disposed Properties                                (1)               (37)
 Expenditures Made on Asset Retirements             (44)               (34)
 Accretion                                           37                 26
 Revisions to Estimates                             (10)               138
 Effects of Foreign Exchange                         36                (22)
                                              -----------------------------
Balance at End of Year (1), (2)                     704                611
                                              -----------------------------
                                              -----------------------------

Notes:
(1) Obligations due within 12 months of $21 million (2005 - $21 million)
    have been included in accounts payable and accrued liabilities.
(2) Obligations relating to our oil and gas activities amount to $658
    million (2005 - $564 million) and obligations relating to our chemicals
    business amount to $46 million (2005 - $47 million).

Our total estimated undiscounted asset retirement obligations amount to $1,770 million. We have discounted the total estimated asset retirement obligations using a weighted-average, credit-adjusted risk-free rate of 5.7% . Approximately $97 million included in our asset retirement obligations will be settled over the next five years. The remaining obligations settle beyond five years and will be funded by future cash flows from our operations.

We own interests in assets for which the fair value of the asset retirement obligations cannot be reasonably determined because the assets currently have an indeterminate life and we cannot determine when remediation activities would take place. These assets include our interest in Syncrude's upgrader and sulphur pile. The estimated future recoverable reserves at Syncrude are significant and given the long life of this asset, we are unable to determine when asset retirement activities would take place. Furthermore, the Syncrude plant can continue to run indefinitely with ongoing maintenance activities. The retirement obligations for these assets will be recorded in the first year in which the lives of the assets are determinable.


10. DEFERRED CREDITS AND OTHER LIABILITIES

                                            December 31        December 31
                                                   2006               2005
---------------------------------------------------------------------------
Fixed-Price Natural Gas
 Contracts (Note 11)                                 74                128
Long-Term Marketing Derivative
 Contracts (Note 11)                                199                124
Deferred Transportation Revenue                      89                 87
Stock-Based Compensation Liability                    6                 53
Defined Benefit Pension Obligations                  48                 39
Capital Lease Obligations                            48                  9
Other                                                52                 39
                                              -----------------------------
Total                                               516                479
                                              -----------------------------
                                              -----------------------------

11. DERIVATIVE INSTRUMENTS AND FINANCIAL RISK MANAGEMENT

(a) Carrying value and estimated fair value of derivative and financial instruments

The carrying value, fair value, and unrecognized gains or losses on our outstanding derivatives and long-term financial assets and liabilities at December 31 are:


(Cdn$ millions)                                  December 31, 2006
---------------------------------------------------------------------------
                                      Carrying          Fair  Unrecognized
                                         Value         Value    Gain/(Loss)
                                      -------------------------------------
Commodity Price Risk
 Non-Trading Activities
  Crude Oil Put Options                     19            19             -
  Fixed-Price Natural Gas Contracts        (96)          (96)            -
  Natural Gas Swaps                         (8)           (8)            -

 Trading Activities
  Crude Oil and Natural Gas                372           372             -
  Future Sale of Gas Inventory               -            25            25

Foreign Currency Risk
 Non-Trading Activities                      -             -             -
 Trading Activities                        (12)          (12)            -
                                      -------------------------------------
Total Derivatives                          275           300            25
                                      -------------------------------------
                                      -------------------------------------

Financial Assets and Liabilities
 Long-Term Debt                         (4,673)       (4,728)          (55)
                                      -------------------------------------
                                      -------------------------------------

(Cdn$ millions)                                  December 31, 2005
---------------------------------------------------------------------------
                                      Carrying          Fair  Unrecognized
                                         Value         Value    Gain/(Loss)
                                      -------------------------------------
Commodity Price Risk
 Non-Trading Activities
  Crude Oil Put Options                      4             4             -
  Fixed-Price Natural Gas Contracts       (175)         (175)            -
  Natural Gas Swaps                         29            29             -

 Trading Activities
  Crude Oil and Natural Gas                161           161             -
  Future Sale of Gas Inventory               -           (35)          (35)

Foreign Currency Risk
 Non-Trading Activities                     14            14             -
 Trading Activities                          8             8             -
                                      -------------------------------------
Total Derivatives                           41             6           (35)
                                      -------------------------------------
                                      -------------------------------------
Financial Assets and Liabilities
 Long-Term Debt                         (3,687)       (3,863)         (176)
                                      -------------------------------------

                                      -------------------------------------

The estimated fair value of all derivative instruments is based on quoted market prices and, if not available, on estimates from third-party brokers or dealers. The carrying value of cash and cash equivalents, restricted cash, margin deposits, amounts receivable and short-term obligations approximates their fair value because the instruments are near maturity.

(b) Commodity price risk management

Non-Trading Activities

We generally sell our crude oil and natural gas under short-term market based contracts.

Crude oil put options

In 2006, we purchased WTI crude oil put options to provide a base level of price protection without limiting our upside to higher prices. These options establish an annual average WTI floor price of US$50/bbl in 2007 on 105,000 bbls/d at a cost of $26 million. In 2004, we purchased WTI crude oil put options to manage the commodity price risk exposure of a portion of our oil production in 2006 and 2005. These options established an annual average WTI floor price of US$38/bbl in 2006 and US$43/bbl in 2005 at a cost of $144 million. The 2006 and 2005 WTI crude oil put options were not used and have expired. The 2007 WTI crude oil put options are stated at fair value and are included in deferred charges and other assets as they settle beyond 12 months from December 31, 2006. Any change in fair value is included in marketing and other on the Unaudited Consolidated Statement of Income.


                         Notional                  Average            Fair
                          Volumes         Term       Price           Value
---------------------------------------------------------------------------
                          (bbls/d)                (US$/bbl) (Cdn$ millions)
WTI Crude Oil Put
 Options                  105,000         2007          50              19
                                                             --------------
                                                             --------------

Fixed-price natural gas contracts and natural gas swaps

In July and August 2005, we sold certain Canadian oil and gas properties and we retained fixed-price natural gas sales contracts that were previously associated with those properties (see Note 16). Since these contracts are no longer used in the normal course of our oil and gas operations, they have been included in the Unaudited Consolidated Balance Sheet at fair value. Any change in fair value is included in marketing and other in the Unaudited Consolidated Statement of Income.


                         Notional                  Average            Fair
                          Volumes         Term       Price           Value
---------------------------------------------------------------------------
                            (Gj/d)                   ($/Gj) (Cdn$ millions)
Fixed-Price Natural Gas
 Contracts                 15,514         2007        2.46             (22)
                           15,514  2008 - 2010 2.56 - 2.77             (74)
                                                             --------------
                                                                       (96)
                                                             --------------
                                                             --------------

Following the sale of the Canadian oil and gas properties, we entered into natural gas swaps to economically hedge our exposure to the fixed-price natural gas sales contracts. Any change in fair value is included in marketing and other in the Unaudited Consolidated Statement of Income.


                         Notional                  Average            Fair
                          Volumes         Term       Price           Value
---------------------------------------------------------------------------
                            (Gj/d)                   ($/Gj) (Cdn$ millions)
Natural Gas Swaps          15,514         2007        7.60              (6)
                           15,514  2008 - 2010        7.60              (2)
                                                             --------------
                                                                        (8)
                                                             --------------
                                                             --------------

Trading Activities

Crude oil and natural gas

We enter into physical purchase and sales contracts as well as financial commodity contracts to enhance our price realizations and lock in our margins. The physical and financial commodity contracts (derivative contracts) are stated at market value. The $372 million fair value of the derivative contracts at December 31, 2006 is included in the Unaudited Consolidated Balance Sheet and any change is included in marketing and other in the Unaudited Consolidated Statement of Income.

Future Sale of Gas Inventory

We have certain NYMEX futures contracts and swaps in place, which effectively lock in our margins on the future sale of our natural gas inventory in storage. We have designated, in writing, some of these derivative contracts as cash flow hedges of the future sale of our storage inventory. As a result, gains and losses on these designated futures contracts and swaps are recognized in net income when the inventory in storage is sold. The principal terms of these outstanding contracts and the unrecognized gains at December 31, 2006 are:


                           Hedged                  Average    Unrecognized
                          Volumes         Month      Price            Gain
---------------------------------------------------------------------------
                           (mmbtu)              (US$/mmbtu) (Cdn$ millions)
NYMEX Natural Gas
 Futures                5,580,000  January 2007      10.73              25
                                                             --------------
                                                             --------------

In late 2006, we de-designated certain futures contracts that had been designated as cash flow hedges of future sales of our natural gas in storage. These contracts were de-designated since it became uncertain that the future sales of natural gas would occur within the designated time frame. As it is reasonably possible that the future sales may take place as designated at the inception of the hedging relationship, gains of $65 million on the futures contracts have been deferred and will be recognized in net income in 2007 in the originally designated time frame.

(c) Foreign currency exchange rate risk management

Non-Trading Activities

US dollar call options - Canexus

The operations of Canexus are exposed to changes in the US-dollar exchange rate as a portion of its sales are denominated in US dollars. Canexus periodically purchases US-dollar call options to reduce this exposure to fluctuations in the Canadian-US dollar exchange rate. Under the outstanding option contracts at December 31, 2006, Canexus LP has the right to sell US$5 million monthly and purchase Canadian dollars at an exchange rate of US$0.85 for the period August 16, 2006 to January 10, 2007 and the right to sell US$5 million and purchase Canadian dollars at an exchange rate of US$0.87 for the period January 10, 2007 to July 11, 2007. The fair value of these contracts at December 31, 2006 was immaterial and changes in fair value are included in marketing and other in the Unaudited Consolidated Statement of Income.

Foreign currency swap

We occasionally use derivative instruments to effectively convert cash flows from Canadian to US dollars and vice versa. During the year, we held a foreign currency derivative instrument that obligated us and the counterparty to exchange principal and interest amounts. In November 2006, we paid US$37 million and received Cdn$50 million to settle the foreign currency swap. The change in fair value was included in marketing and other in the Unaudited Consolidated Statement of Income.

Trading Activities

Our sales and purchases of crude oil and natural gas are generally transacted in or referenced to the US dollar, as are most of the financial commodity contracts used by our marketing group. However, we pay many of our customers in Canadian dollars. We enter into US-dollar forward contracts and swaps to manage this exposure. Losses of $12 million on our US dollar forward contracts and swaps at December 31, 2006 are included in the Unaudited Consolidated Balance Sheet. Any change in fair value is included in marketing and other in the Unaudited Consolidated Statement of Income.

(d) Total carrying value of derivative contracts related to trading activities

Amounts related to derivative instruments held by our marketing operation are equal to fair value as we use mark-to-market accounting. The amounts are as follows at December 31:


(Cdn$ millions)                                    2006               2005
---------------------------------------------------------------------------
Accounts Receivable                                 731                382
Deferred Charges and Other Assets(1)                153                232
                                              -----------------------------
 Total Derivative Contract Assets                   884                614
                                              -----------------------------
                                              -----------------------------

Accounts Payable and Accrued
 Liabilities                                        325                321
Deferred Credits and Other
 Liabilities(1)                                     199                124
                                              -----------------------------
 Total Derivative Contract

  Liabilities                                       524                445
                                              -----------------------------
                                              -----------------------------

Total Derivative Contract Net
 Assets(2)                                          360                169
                                              -----------------------------
                                              -----------------------------

Notes:
(1) These derivative contracts settle beyond 12 months and are considered
    non-current.
(2) Comprised of $372 million (2005 - $161 million) related to commodity
    contracts and losses of $12 million (2005 - $8 million) related to
    US-dollar forward contracts and swaps.

As a physical energy marketer, we match the contract months of our derivative instruments with the contract months of our physical sales and purchases. As a result, our disclosure with respect to derivative instruments includes amounts with no ongoing commodity price or foreign exchange risk as at December 31, 2006. Excluding such amounts, derivative contracts included in accounts receivable at December 31, 2006 amounted to $460 million (December 31, 2005 - $382 million) and derivative contracts included in accounts payable and accrued liabilities amounted to $312 million (December 31, 2005 - $290 million).

Our exchange-traded derivative contracts are subject to margin deposit requirements. We are required to advance cash to counterparties in order to satisfy their requirements. We have margin deposits of $197 million (December 31, 2005 - nil), which have been included in restricted cash and margin deposits on our Unaudited Consolidated Balance Sheet at December 31, 2006.

12. SHAREHOLDERS' EQUITY

Dividends

Dividends per common share for the three months ended December 31, 2006 were $0.05 (2005 - $0.05) . Dividends per common share for the twelve months ended December 31, 2006 were $0.20 (2005 - $0.20).

13. EARNINGS PER COMMON SHARE

We calculate basic earnings per common share from continuing operations using net income from continuing operations divided by the weighted-average number of common shares outstanding. We calculate basic earnings per common share using net income and the weighted-average number of common shares outstanding. We calculate diluted earnings per common share from continuing operations and diluted earnings per common share in the same manner as basic, except we use the weighted-average number of diluted common shares outstanding in the denominator.


                                           Three Months      Twelve Months
                                      Ended December 31  Ended December 31
(millions of shares)                   2006        2005   2006        2005
---------------------------------------------------------------------------
Weighted-average number of common
 shares outstanding                   262.5       261.0  262.1       260.4
Shares issuable pursuant to tandem
 options                               13.0        12.3   13.9        13.4
Shares to be purchased from proceeds
 of tandem options                     (6.8)       (6.0)  (7.1)       (7.4)
                                      -------------------------------------
Weighted-average number of diluted
 common shares outstanding            268.7       267.3  268.9       266.4
                                      -------------------------------------
                                      -------------------------------------

In calculating the weighted-average number of diluted common shares outstanding for the three and twelve months ended December 31, 2006, we excluded 830,800 and 211,283 options respectively, because their exercise price was greater than the average common share market price in those periods. In calculating the weighted-average number of diluted common shares outstanding for the three and twelve months ended December 31, 2005, all options were included because their exercise price was less than the average common share market price in the period. During the periods presented, outstanding stock options were the only potentially dilutive instruments.

14. CASH FLOWS

(a) Charges and credits to income not involving cash


                                           Three Months      Twelve Months
                                      Ended December 31  Ended December 31
                                       2006        2005   2006        2005
---------------------------------------------------------------------------
Depreciation, Depletion,
 Amortization
 and Impairment                         354         304  1,124       1,052
Stock-Based Compensation                 57          16    101         428
Provision for Future Income Taxes        16          43    315        (105)
Change in Fair Value of Crude Oil
 Put Options                              5          12     11         196
Non-Cash Items included in
 Discontinued Operations                  -           -      -        (325)
Gain on Disposition of Assets            (4)          -     (4)         (4)
Gain on Dilution of Interest in
 Chemicals Business                       -           -      -        (193)
Net Income Attributable to
 Non-Controlling Interests                -           3     12           8
Other                                    37          22     70          24
                                      -------------------------------------
Total                                   465         400  1,629       1,081
                                      -------------------------------------
                                      -------------------------------------



(b) Changes in non-cash working capital

                                           Three Months      Twelve Months
                                      Ended December 31  Ended December 31
                                       2006        2005   2006        2005
---------------------------------------------------------------------------
 Accounts Receivable                   (212)       (261)   345      (1,078)
 Inventories and Supplies               (55)         11   (302)       (163)
 Other Current Assets                    15           5    (14)        (10)
 Accounts Payable and Accrued
  Liabilities                           168         (85)   (72)        982
 Other                                   18          15      -          20
                                      -------------------------------------
Total                                   (66)       (315)   (43)       (249)
                                      -------------------------------------
                                      -------------------------------------

Relating to:
 Operating Activities                   (85)       (315)  (177)       (195)
 Investing Activities                    19           -    134         (54)
                                      -------------------------------------
Total                                   (66)       (315)   (43)       (249)
                                      -------------------------------------
                                      -------------------------------------


(c) Other cash flow information

                                           Three Months      Twelve Months
                                      Ended December 31  Ended December 31
                                       2006        2005   2006        2005
---------------------------------------------------------------------------
Interest Paid                            61          47    278         237
Income Taxes Paid                        81          77    398         325
                                      -------------------------------------


15. MARKETING AND OTHER

                                           Three Months      Twelve Months
                                      Ended December 31  Ended December 31
                                       2006        2005   2006        2005
---------------------------------------------------------------------------
Marketing Revenue, Net                  350         379  1,309         847
Business Interruption Insurance
 Proceeds                                30           -    154           2
Change in Fair Value of Crude
 Oil Put Options                         (5)        (12)   (11)       (196)
Interest Income                           9           7     36          29
Foreign Exchange Losses                 (23)        (20)   (72)        (19)
Other                                     -          18     34          39
                                      -------------------------------------
Total                                   361         372  1,450         702
                                      -------------------------------------
                                      -------------------------------------

16. DISCONTINUED OPERATIONS

In the third quarter of 2005, we sold certain Canadian conventional oil and gas properties in southeast Saskatchewan, northwest Saskatchewan, northeast British Columbia and the Alberta foothills. The results of operations of these properties have been presented as discontinued operations. The sales closed in the third quarter with net proceeds of $900 million after closing adjustments and we realized gains of $225 million. These gains are net of losses attributable to pipeline contracts and fixed price gas sales contracts associated with these properties that we have retained but no longer use in connection with our oil and gas business.


Twelve months ended December 31
                                                                      2005
---------------------------------------------------------------------------
Revenues and Other Income
 Net Sales                                                             154
 Gain on Disposition of Assets                                         225

                                                                     ------
                                                                       379
Expenses
 Operating                                                              27
 Depreciation, Depletion, Amortization and Impairment                   28
 Exploration Expense                                                     1
                                                                     ------
Income before Income Taxes                                             323
 Provision for Future Income Taxes                                    (129)
                                                                     ------

Net Income from Discontinued Operations                                452
                                                                     ------
                                                                     ------
Earnings per Common Share ($/share)
 Basic (Note 13)                                                      1.74
                                                                     ------
                                                                     ------
 Diluted (Note 13)                                                    1.70
                                                                     ------
                                                                     ------

There were no assets and liabilities related to discontinued operations at December 31, 2006 and 2005.

17. COMMITMENTS, CONTINGENCIES AND GUARANTEES

As described in Note 15 to the Audited Consolidated Financial Statements included in our 2005 Annual Report on Form 10-K and described below, there are a number of lawsuits and claims pending, the ultimate results of which cannot be ascertained at this time. We record costs as they are incurred or become determinable. We believe the resolution of these matters would not have a material adverse effect on our liquidity, consolidated financial position or results of operations.

In June 2003, a subsidiary of Occidental Petroleum Corporation (Occidental) initiated an arbitration against us at the International Court of Arbitration of the International Chamber of Commerce (ICC Court) regarding an Area of Mutual Interest agreement relating to certain portions of Block 51 in the Republic of Yemen. In April 2006, the ICC Court concluded that we breached this agreement and as a result, Occidental was entitled to monetary damages. In late 2006, we agreed to settle the arbitration with Occidental for US$135 million. This amount was accrued in other expenses in our Unconsolidated Statement of Income during 2006. No further amounts are expected to be payable under the settlement.

18. PENSION AND OTHER POST RETIREMENT BENEFITS

(a) Net pension expense recognized under our defined benefit pension plans


                                           Three Months      Twelve Months
                                      Ended December 31  Ended December 31
                                       2006        2005   2006        2005
---------------------------------------------------------------------------
Nexen
 Cost of Benefits Earned by Employees     4           5     16          15
 Interest Cost on Benefits Earned         3           2     12          12
 Expected Return on Plan Assets          (2)         (2)   (11)        (10)
 Net Amortization and Deferral            -           -      3           1
                                      -------------------------------------
 Net                                      5           5     20          18
                                      -------------------------------------

Canexus
 Cost of Benefits Earned by Employees     -           1      3           1
 Interest Cost on Benefits Earned         -           1      3           1
 Expected Return on Plan Assets           -          (1)    (3)         (1)
 Net Amortization and Deferral            -           -      -           -
                                      -------------------------------------
 Net                                      -           1      3           1
                                      -------------------------------------

Syncrude
 Cost of Benefits Earned by Employees     2           1      5           4
 Interest Cost on Benefits Earned         2           1      5           5
 Expected Return on Plan Assets          (2)         (1)    (5)         (4)
 Net Amortization and Deferral           (1)          3      2           3
                                      -------------------------------------
 Net                                      1           4      7           8
                                      -------------------------------------
Total                                     6          10     30          27
                                      -------------------------------------
                                      -------------------------------------

(b) Employer funding contributions

Our expected total funding contributions for 2006 disclosed in Note 16 to the Audited Consolidated Financial Statements in our 2005 Annual Report on Form 10-K have not changed for the Nexen and Canexus defined benefit pension plans and our share of Syncrude's defined benefit pension plan.

19. PROVISION FOR FUTURE INCOME TAXES

During the first quarter of 2006, we recorded a future income tax expense of $277 million related to an increase in the supplemental tax rate on oil and gas activities in the United Kingdom. Legislation was introduced to the United Kingdom parliament during the first quarter to increase the supplemental tax rate from 10% to 20%, effective January 1, 2006.

20. OPERATING SEGMENTS AND RELATED INFORMATION

Nexen is involved in activities relating to Oil and Gas, Syncrude and Chemicals in various geographic locations as described in Note 20 to the Audited Consolidated Financial Statements included in our 2005 Annual Report on Form 10-K.


Three months ended December 31, 2006

(Cdn$ millions)                                    Oil and Gas
---------------------------------------------------------------------------
                                                                   Other
                                     Yemen  Canada    US    UK Countries(1)
                                    ---------------------------------------
Net Sales                              299     108   133   105        31
Marketing and Other                      2       -    30     4         -
                                    ---------------------------------------
Total Revenues                         301     108   163   109        31
Less: Expenses
 Operating                              41      40    27    17         3
 Depreciation, Depletion,
  Amortization and Impairment (3)       79      47   141    48         2
 Transportation and Other                2      11     -     -         1
 General and Administrative (5)          6      24    14     8        14
 Exploration                             3       8    74    13        33(6)
 Interest                                -       -     -     -         -
                                    ---------------------------------------
Income (Loss) from Continuing
 Operations before Income Taxes        170     (22)  (93)   23       (22)
                                    ---------------------------------------
                                    ---------------------------------------
Less: Provision for Income Taxes (7)
Less: Non-Controlling Interests

Net Income


Identifiable Assets                    464   3,923 1,620 5,490       245
                                    ---------------------------------------
                                    ---------------------------------------
Capital Expenditures
 Development and Other                  35     374   143   186         8
 Exploration                             9      21    22    27        31
 Proved Property Acquisitions            -       1     -     -
                                    ---------------------------------------
                                        44     396   165   213        39
                                    ---------------------------------------
                                    ---------------------------------------
Property, Plant and Equipment
 Cost                                2,404   5,216 2,889 4,710       249
 Less: Accumulated DD&A              2,128   1,448 1,445   432        78
                                    ---------------------------------------
Net Book Value                         276   3,768 1,444 4,278       171
                                    ---------------------------------------
                                    ---------------------------------------


                             Energy                    Corporate
(Cdn$ millions)           Marketing Syncrude Chemicals and Other     Total
---------------------------------------------------------------------------
Net Sales                        25      118       101         -       920
Marketing and Other             350        -        (6)      (19)(2)   361
                            -----------------------------------------------
Total Revenues                  375      118        95       (19)    1,281
Less: Expenses
 Operating                       13       48        64         -       253
 Depreciation, Depletion,
  Amortization and
  Impairment (3)                  6       14        10         7       354
 Transportation and Other       198        4         9        20(4)    245
 General and
  Administrative (5)             19        1         9        81       176
 Exploration                      -        -         -         -       131
 Interest                         -        -         3        15        18
                            -----------------------------------------------

Income (Loss) from
 Continuing Operations
 before Income Taxes            139       51         -      (142)      104
                            ----------------------------------------
                            ----------------------------------------
Less: Provision for
 Income Taxes (7)                                                       27
Less: Non-Controlling
 Interests                                                               -
                                                                    -------
Net Income