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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                   FORM 11-K


      (Mark One)

          [X]     ANNUAL REPORT PURSUANT TO SECTION 15(d)
                  OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE FISCAL YEAR ENDED DECEMBER 31, 2008

                                       OR

          [ ]     TRANSITION REPORT PURSUANT TO SECTION 15(d)
                  OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE TRANSITION PERIOD FROM __________ TO __________


                         COMMISSION FILE NO. 001-06702


     A.   Full title of the plan and  address of the plan,  if  different  from
that of the issuer named below:

                               NEXEN SAVINGS PLAN
                        5601 Granite Parkway, Suite 1400
                            Plano, Texas 75024-6654

     B.   Name of issuer of the  securities  held  pursuant to the plan and the
address of its principal executive office:

                                   NEXEN INC.
                              801 - 7th Avenue SW
                        Calgary, Alberta, Canada T2P 3P7




NEXEN SAVINGS PLAN

FINANCIAL STATEMENTS AND SUPPLEMENTAL SCHEDULE

DECEMBER 31, 2008 AND 2007




                                C O N T E N T S


                                                                           Page


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM......................1


FINANCIAL STATEMENTS

     Statements of Net Assets Available for Benefits.........................2

     Statements of Changes in Net Assets Available for Benefits..............3

     Notes to Financial Statements...........................................4


SUPPLEMENTAL SCHEDULE *

     Schedule H, line 4i - Schedule of Assets (Held at End of Year).........16



     * Other  schedules  required by 29 CFR  2520.103-10  of the  Department of
     Labor's Rules and Regulations for Reporting and Disclosure  under Employee
     Retirement  Income Security Act of 1974 have been omitted because they are
     not applicable.





                  [LETTERHEAD OF WEAVER AND TIDWELL, L.L.P.]




                        REPORT OF INDEPENDENT REGISTERED
                             PUBLIC ACCOUNTING FIRM

To the Administrative Committee
NEXEN SAVINGS PLAN
Plano, Texas

We have  audited  the  accompanying  statements  of net  assets  available  for
benefits of the Nexen Savings Plan (the Plan) as of December 31, 2008 and 2007,
and the related  statements of changes in net assets available for benefits for
the years then ended. These financial statements and the supplemental  schedule
referred  to  below  are  the  responsibility  of  the  Plan's   Administrative
Committee.  Our  responsibility  is to express  an  opinion on these  financial
statements and schedule based on our audits.

We conducted our audits in accordance  with the standards of the Public Company
Accounting  Oversight Board (United  States).  Those standards  require that we
plan and perform the audits to obtain  reasonable  assurance  about whether the
financial  statements  are free of  material  misstatement.  An audit  includes
examining,  on a test basis, evidence supporting the amounts and disclosures in
the  financial  statements.  An audit also includes  assessing  the  accounting
principles  used  and  significant  estimates  made by  management,  as well as
evaluating the overall financial  statement  presentation.  We believe that our
audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements referred to above present fairly, in
all  material  respects,  the net assets  available  for  benefits of the Nexen
Savings  Plan as of  December  31,  2008 and 2007,  and the  changes in its net
assets  available  for benefits for the years then ended,  in  conformity  with
accounting principles generally accepted in the United States of America.

Our audits  were  performed  for the purpose of forming an opinion on the basic
financial  statements  taken as a whole.  The  supplemental  schedule of assets
(held at end of year) is presented for purposes of  additional  analysis and is
not a required  part of the basic  financial  statements  but is  supplementary
information  required by the  Department of Labor's Rules and  Regulations  for
Reporting and Disclosure under the Employee  Retirement  Income Security Act of
1974. The supplemental  schedule has been subjected to the auditing  procedures
applied in the audit of the basic financial  statements and, in our opinion, is
fairly  stated in all  material  respects in  relation  to the basic  financial
statements taken as a whole.


/s/ Weaver and Tidwell, L.L.P.

WEAVER AND TIDWELL, L.L.P.

Dallas, Texas
June 16, 2009






                               NEXEN SAVINGS PLAN
                STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                           DECEMBER 31, 2008 AND 2007


                                                                              2007
                                                             2008        (As restated)
                                                       ---------------  ---------------
                                                                    
                                     ASSETS
     Cash                                                $    197,139     $        340
     Investments, at fair value                            37,692,731       57,978,018
     Accrued dividends receivable                              26,221           13,749
     Participant loans                                        808,274          761,928
                                                       ---------------  ---------------

TOTAL ASSETS                                               38,724,365       58,754,035
                                                       ---------------  ---------------

                                   LIABILITIES
Due to broker                                                 172,448              304
Other payables                                                      5                5
                                                       ---------------  ---------------

TOTAL LIABILITIES                                             172,453              309
                                                       ---------------  ---------------

NET ASSETS AVAILABLE FOR BENEFITS AT FAIR VALUE            38,551,912       58,753,726

Adjustment from fair value to contract value for
     fully benefit-responsive investment contracts            219,680           39,594
                                                       ---------------  ---------------

NET ASSETS AVAILABLE FOR BENEFITS                        $ 38,771,592     $ 58,793,320
                                                       ===============  ===============




The Notes to Financial Statements are
an integral part of these statements.

                                       2





                               NEXEN SAVINGS PLAN
           STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                 FOR THE YEARS ENDED DECEMBER 31, 2008 AND 2007

                                                                                                   2007
                                                                                   2008          (AS RESTATED)
                                                                             ----------------------------------
                                                                                           
ADDITIONS

     Investment income:
         Net appreciation (depreciation) in fair value of investments        $  (20,741,133)     $   1,694,755
         Interest                                                                    75,112            315,117
         Dividends                                                                1,454,258          3,207,061
                                                                             ---------------   ----------------

                                                                                (19,211,763)         5,216,933
                                                                             ---------------   ----------------

     Contributions:
         Participants                                                             2,883,061          2,536,726
         Employer                                                                 1,862,516          1,561,047
         Rollover                                                                   109,074          1,244,981
                                                                             ---------------   ----------------

                                                                                  4,854,651          5,342,754
                                                                             ---------------   ----------------

     Transfer into plan                                                              64,116                  -
                                                                             ---------------   ----------------


NET ADDITIONS                                                                   (14,292,996)        10,559,687
                                                                             ---------------   ----------------

DEDUCTIONS

     Benefits paid to participants                                                5,724,076          5,037,612
     Transfer of Plan assets                                                              -          1,928,109
     Administrative expenses                                                          4,656              4,988
                                                                             ---------------   ----------------

TOTAL DEDUCTIONS                                                                  5,728,732          6,970,709
                                                                             ---------------   ----------------

NET INCREASE (DECREASE) IN NET ASSETS AVAILABLE                                 (20,021,728)         3,588,978


NET ASSETS AVAILABLE FOR BENEFITS, BEGINNING OF YEAR                             58,793,320         55,204,342
                                                                             ---------------   ----------------


NET ASSETS AVAILABLE FOR BENEFITS, END OF YEAR                                $  38,771,592      $  58,793,320
                                                                             ===============   ================




The Notes to Financial Statements are
an integral part of these statements.

                                       3



                               NEXEN SAVINGS PLAN
                         NOTES TO FINANCIAL STATEMENTS


NOTE 1.   DESCRIPTION OF THE PLAN

     The following description of the Nexen Savings Plan (the Plan) is provided
     for general information purposes only. More complete information regarding
     the Plan's provisions may be found in the Plan Document.

     The Plan is a defined  contribution  plan that was  adopted  September  1,
     1988,  and  amended and  restated  effective  January 1, 2002,  to provide
     eligible  employees  of Nexen  Petroleum  U.S.A.  Inc.  (the  Company) and
     participating  employers,  Nexen Marketing U.S.A. Inc. and Nexen Petroleum
     International  (U.S.A.) Inc. (the Participating  Employers),  wholly owned
     subsidiaries  of Nexen Inc., a method to meet their  long-range  financial
     objectives  under the  requirements  of  Section  401(k)  of the  Internal
     Revenue Code. In early January 2007 the Plan  transferred  assets totaling
     $1,928,109 to the newly established Canexus U.S. Inc., Retirement Plan.

     On March 31, 2007, Quadra Energy Trading, Inc. (QETI) merged with and into
     Nexen Marketing U.S.A. Inc., a participating  employer.  Employees of QETI
     transferred employment to the Company and its affiliates on April 1, 2007.
     Effective  December 31, 2007,  the QETI 401(k) Profit Sharing Plan & Trust
     (the QETI Plan) was amended to fully vest the accounts of all participants
     in the QETI Plan who were employees of Nexen Marketing  U.S.A.  Inc. as of
     December 31, 2007. Effective January 1, 2008, the QETI Plan was amended to
     merge with and into the Nexen Savings Plan and Trust.

     For the period from  January 1, 2007,  to April 5, 2007,  and for the year
     ended December 31, 2006,  Nationwide Trust Company, FSB was the trustee of
     the Plan.  On April 5,  2007,  all  services  as  trustee of the Plan were
     transferred  to the  Charles  Schwab  Trust  Company  (the  Trustee).  The
     recordkeeping  function is performed by Schwab Retirement Services Company
     formerly know as "The 401(k) Company" (the Recordkeeper).

     Effective February 28, 2008, the Company transferred all the assets of the
     Invesco Stable Value Fund to the Charles  Schwab Stable Value Fund,  which
     is a similar type stable value investment.

     All regular employees of the Company and  Participating  Employers who are
     18 years of age and over are  eligible to  participate  in the Plan on the
     entry date coinciding with or following the date the employee  attains age
     18.  Participant  contributions are made on a voluntary basis and directly
     withheld from the participant's eligible  compensation,  as defined in the
     Plan Document.  The Plan offers  participants  the option of making Salary
     Deferral Contributions and/or Roth 401(k) Contributions. Contributions may
     be made with:  pretax  dollars;  after-tax  dollars;  or a combination  of
     pretax and after-tax dollars.  Eligible compensation excludes overtime and
     bonuses.   Participants   are   immediately   vested  in  their   employee
     contribution account and actual earnings thereon.

     The  Company  and  Participating  Employers  will  match  100  percent  of
     Participant   contributions  up  to  6%  of  the  Participant's   eligible
     compensation.  Participants  are immediately 100% vested in their employer
     matching account.


                                       4


NOTE 1.   DESCRIPTION OF THE PLAN - CONTINUED

     The Plan's  investment  options are: (1) Charles Schwab Stable Value Fund,
     (2) Bond Fund of America A, (3) American  Century  Real Estate  Investment
     Fund,  (4) Royce Value  Service Fund,  (5) DWS Equity 500 Index Fund,  (6)
     Growth Fund of America A, (7) First Eagle Overseas Fund A, (8) EuroPacific
     Growth Fund A, (9) Washington  Mutual  Investors Fund A, (10)  Oppenheimer
     Developing  Markets Fund A, (11) Third Avenue  Value Fund,  (12)  American
     Beacon Small Cap Value Plan,  and (13) Nexen Inc.  Stock Fund. All Company
     and Participating  Employers contributions are invested in accordance with
     the investment choices selected by each respective Participant.

     Distribution of a Participant's  entire account becomes due in three ways:
     (1) upon  termination  of employment,  (2) death,  or (3)  disability,  as
     defined  in the  Plan  Document.  At the  option  of  the  Participant  or
     beneficiary,  such  account  balances  may be  distributed  in a  lump-sum
     payment or via  periodic  installment  payments as  described  in the Plan
     Document.

     Withdrawals  from  the  Plan by  active  Participants  are  permitted  for
     specific instances of financial hardship and age 59 1/2 withdrawals, which
     can be made once every six months.  Once per Plan year, a Participant  may
     withdraw a portion or all of his or her  after-tax  and rollover  account,
     subject to a $250 minimum.

     In  December  2005,  the  Financial   Accounting  Standards  Board  issued
     Statement of Position (SOP) 94-4-1, "REPORTING OF FULLY BENEFIT-RESPONSIVE
     INVESTMENT  CONTRACTS HELD BY CERTAIN INVESTMENT  COMPANIES SUBJECT TO THE
     AICPA INVESTMENT COMPANY GUIDE AND DEFINED-CONTRIBUTION HEALTH AND WELFARE
     AND PENSION PLANS," which affects defined  contribution  pension plans and
     health and  welfare  plans that hold fully  benefit-responsive  investment
     contracts. Currently the Plan holds one investment which is subject to the
     new guidance  under SOP 94-4-1,  the Stable Value Fund,  which is a common
     collective  trust  fund.  The  results  of the new  statements  have  been
     evaluated and are  reflected in the Statement of Net Assets  Available for
     Benefits  and  the  Statement  of  Changes  in Net  Assets  Available  for
     Benefits.


NOTE 2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     USE OF ESTIMATES

         The preparation of financial  statements in conformity with accounting
         principles generally accepted in the United States requires management
         to make estimates and assumptions  that affect the reported amounts of
         net assets available for benefits and disclosure of contingent  assets
         and  liabilities  at the  date  of the  financial  statements  and the
         reported  amounts  of  additions  to and  deductions  from net  assets
         available for benefits  during the reporting  period.  Actual  results
         could differ from those estimates.


                                       5


NOTE 2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONTINUED

     BASIS OF ACCOUNTING

         The  financial  statements  of the Plan are  presented  on the accrual
         basis of accounting in accordance with accounting principles generally
         accepted in the United States of America.  Current year contributions,
         expenses,   and  investment   income,   including  both  interest  and
         dividends,  which are not received or paid until the subsequent  year,
         are accrued in the current year. Benefits are recorded when paid.

         As described in Financial  Accounting  Standards Board Staff Position,
         FSP AAG INV-1 and SOP 94-4-1,  Reporting  of Fully  Benefit-Responsive
         Investment  Contracts Held by Certain Investment  Companies Subject to
         the AICPA Investment Company Guide and Defined-Contribution Health and
         Welfare and Pension Plans (the FSP),  investment  contracts  held by a
         defined-contribution  plan are  required to be reported at fair value.
         However, contract value is the relevant measurement attribute for that
         portion  of  the  net  assets  available  for  benefits  of a  defined
         contribution plan attributable to fully benefit-responsive  investment
         contracts  because  contract  value is the amount  participants  would
         receive  if they were to  initiate  permitted  transactions  under the
         terms of the plan. As required by the FSP, the Statement of Net Assets
         Available  for  Benefits  presents  the fair  value of the  investment
         contracts as well as the  adjustment  of the fully  benefit-responsive
         investment  contracts from fair value to contract value. The Statement
         of Changes in Net Assets  Available  for  Benefits  is  prepared  on a
         contract value basis.

     INVESTMENTS

         Investments  are stated at fair value as determined by the Trust based
         on quoted market prices at the Plan's year end. Purchases and sales of
         investments  are  recorded  on a trade date  basis.  Participants  may
         direct their contributions and any related earnings into many distinct
         investment  options,  including the Nexen Inc. Stock Fund. Interest is
         allocated to Participant accounts on a pro-rata basis depending on the
         Participants'  account  balance.  Dividends are allocated based on the
         number of shares in a Participant's account.

         A brief description of investment options is as follows:

              SCHWAB  STABLE  VALUE CLASS S - The Charles  Schwab  Stable Value
              Fund  is  a   collective   investment   trust  fund  that  allows
              participants to invest in stable value assets.  The fund seeks to
              provide  investors with a stable rate of return while  preserving
              principal and maintaining liquidity.

              AMERICAN BEACON SMALL CAP VALUE PLAN - is a small value fund that
              seeks  long-term  capital  appreciation  and  current  income  by
              investing  over  80%  of  its  assets  in  equity  securities  of
              companies within the United States.


                                       6


NOTE 2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONTINUED

     INVESTMENTS - CONTINUED

         BOND  FUND  OF  AMERICA  A  -  invests   primarily   in  high  quality
         intermediate-term corporate bonds and U.S. government securities.

         AMERICAN CENTURY REAL ESTATE INVESTMENT FUND - seeks long-term capital
         appreciation;  current income is a secondary  consideration.  The fund
         invests at least 80% of assets in equities  issued by companies in the
         real estate industry.

         ROYCE VALUE SERVICE FUND - is a small growth fund that seeks long-term
         capital  appreciation  by  investing  at least 80% of assets in equity
         securities.

         DWS EQUITY 500 INDEX FUND - is a large company  growth and income fund
         that invests primarily in equity  securities of companies  included in
         the S & P 500.

         GROWTH FUND OF AMERICA A - is a large  growth fund that seeks  capital
         growth by investing primarily in common stocks. The fund may invest up
         to 15% of assets in  securities  of issuers  domiciled  outside of the
         United States and Canada.

         FIRST  EAGLE  OVERSEAS  FUND A - is a foreign  stock  fund that  seeks
         long-term  capital growth by investing  primarily in equities of small
         and mid-sized foreign companies in developed and emerging markets.

         EUROPACIFIC GROWTH FUND A - is a large company foreign stock fund that
         seeks  long-term  capital   appreciation  by  investing  in  companies
         domiciled in developed countries outside the United States.

         WASHINGTON MUTUAL INVESTORS FUND A - is a large company value-oriented
         growth and income fund.

         OPPENHEIMER  DEVELOPING  MARKETS FUND A - is an emerging markets stock
         fund that seeks  long-term  growth by  investing in stock of issues in
         countries with developing markets.

         THIRD AVENUE  VALUE FUND - is a small value fund that seeks  long-term
         capital  appreciation  by  investing  in equity  securities  issued by
         companies  that are  believed  to be  undervalued  and to have  strong
         financial positions and responsible management.

         NEXEN  INC.  STOCK FUND - provides  ownership  interest  in Nexen Inc.
         Common Stock with  short-term  cash sufficient to maintain a liquidity
         balance  to  facilitate   daily   transactions   and  compliance  with
         securities law.

         CASH MANAGEMENT TRUST OF AMERICA - Seeks to provide income on cash
         reserves, while preserving capital and maintaining liquidity, through
         high-quality money market instruments. This account holds the cash
         position of the unitized Nexen Inc. Stock Fund.


                                    7


NOTE 2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONTINUED

     NATURE OF INVESTMENT CONTRACTS AND RESTATEMENT

         The Plan's Schwab Stable Value Class S (the Fund) invests primarily in
         investment  contracts  such  as  traditional   guaranteed   investment
         contracts  (GICs) and enters  into  wrapper  contracts  (also known as
         synthetic GICs). In a traditional GIC, investment contracts are backed
         by the  general  account of the issuer.  The Fund  deposits a lump sum
         with  the  issuer  and  receives  a  guaranteed  interest  rate  for a
         specified  time.  Interest  is accrued on either a simple  interest or
         fully compounded  basis and paid either  periodically or at the end of
         the  contract  terms.   The  issuer   guarantees  that  all  qualified
         participant  withdrawals  will occur at contract value (principal plus
         accrued interest).

         In a synthetic GIC structure,  the underlying investments are owned by
         the Fund and held in trust for plan participants. The Fund enters into
         wrapper contracts from high-quality  insurance companies or banks that
         serve to substantially offset the price fluctuations in the underlying
         investments  caused by  movements  in  interest  rates.  Each  wrapper
         contract  obligates the principal  amounts  invested in the underlying
         investments,  plus interest  accrued at a crediting  rate  established
         under the contract, less any adjustments for withdrawals (as specified
         in the wrapper  agreement).  Under the terms of the wrapper  contract,
         the  realized  and  unrealized  gains  and  losses  on the  underlying
         investments  are,  in  effect,  amortized  over  the  duration  of the
         underlying  investments,  through  adjustments to the future  contract
         interest  crediting rate (which is the rate earned by  participants in
         the  Fund  for  the  underlying  investments).  The  wrapper  contract
         provides  that the  adjustments  to the  interest  crediting  will not
         result in a future  interest  crediting  rate that is less than  zero.
         This ensures that participants' principal and accrued interest will be
         protected.

         In general, if the contract value of the wrapper agreement exceeds the
         market  value  of  the  underlying   investments   (including  accrued
         interest),   the  wrapper  provider  becomes  obligated  to  pay  that
         difference  to the  Fund in the  event  that  shareholder  redemptions
         result in a total  liquidation.  In the event that  there are  partial
         shareholder  redemptions  that would  otherwise  cause the  contract's
         crediting rate to fall below zero percent, the wrapper is obligated to
         contribute to the Fund an amount  necessary to maintain the contract's
         crediting  rate at least zero percent.  The  circumstance  under which
         payments are made and the timing of payments  between the Fund and the
         wrapper provider may vary based on the terms of the wrapper contract.

         In  certain  circumstances,  the  amount  withdrawn  from the  wrapper
         contract would be payable at fair value rather than at contract value.
         These  events  include  termination  of the Plan,  a material  adverse
         change to the provisions of the Plan, the employer  elects to withdraw
         from a wrapper  contract in order to switch to a different  investment
         provider,  or if the  terms of a  successor  Plan (in the event of the
         spin-off  or sale of a  division)  do not  meet the  wrapper  contract
         issuer's  underwriting  criteria  for  issuance  of  a  clone  wrapper
         contract.


                                       8


NOTE 2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONTINUED

     NATURE OF INVESTMENT CONTRACTS AND RESTATEMENT- CONTINUED

         While it is possible that some of the plans participating in the Trust
         may experience  plan  terminations  or other events that would trigger
         fair value  payouts  under the Trust's  wrapper  agreements,  based on
         prior experience,  management of the Trust believes it is not probable
         that such events would be of sufficient magnitude to limit the ability
         of the Trust to transact at contract  value with the  participants  in
         the Trust.  Given that such events are beyond the control of the Plan,
         however, there can be no guarantee that this will be the case.

         Average yields for Charles Schwab and Invesco (2007) Stable Value Funds


                                                                  Year ended
                                                                 December 31,
                                                              -----------------
                                                                 2008     2007
                                                              --------  -------
         Based on actual earnings (at fair value)               5.250%   5.334%
         Based on interest rate credited to
               participants (at fair value)                     3.720%   4.270%


         The  Company  restated  Investments,  at fair  value  for  year  ended
         December  31,  2007,  to  properly  reflect the fair value to contract
         value  adjustment  for the Stable Value Fund as required in accordance
         with  SOP  94-4-1.  Accordingly,  the  Investments,  at fair  value as
         reported  was  adjusted  from  $58,017,612  to  $57,978,018,  and  the
         adjustment   from   fair   value   to   contract   value   for   fully
         benefit-responsive  investment contracts as reported was adjusted from
         a negative  balance of $39,594 to a positive balance of $39,594 in the
         Statement of Net Assets Available for Benefits.  Further,  Interest as
         reported  in the  Statement  of Changes in Net  Assets  Available  for
         Benefits  for the year ended  December 31,  2007,  was  adjusted  from
         $275,523 to $315,117 to reflect this  restatement  in the Stable Value
         Fund investment.

     MARKET AND CREDIT RISKS

         The Plan invests in a variety of investments.  Investments are exposed
         to various risks,  such as interest rate, market and credit risks. Due
         to the level of risk  associated  with certain  investments,  it is at
         least  reasonably  possible  that the  changes  in the  values  of the
         investments  will occur in the near term and that such  changes  could
         materially  affect the amount reported in the Plan's  statement of net
         assets available for benefits.

     ADMINISTRATION

         The Plan is administered  by the  Administrative  Committee,  which is
         composed  of  members  who are either  officers  or  employees  of the
         Company.  Investment  options for the Plan are selected by the Benefit
         Plan Design Committee from funds available  through the  Recordkeeper.
         Some of the fund providers  charge 12b-1 fees at the fund level before
         earnings are paid to investors.


                                       9


NOTE 2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONTINUED

     ADMINISTRATION

         The  Recordkeeper  receives fees from these fund  providers from 12b-1
         fees charged to the funds. 12b-1 fees received by the Recordkeeper are
         based on Plan  assets  invested in each fund.  Similarly,  all Trustee
         fees for the Plan are  received  from 12b-1 fees charged to the funds.
         12b-1 fees  received  by the  Trustee  are also  based on Plan  assets
         invested in each fund.

     LOANS TO PARTICIPANTS

         Participant  loans receivable are stated at cost,  which  approximates
         fair value. A Participant may borrow up to the lesser of 50% of his or
         her vested  account  balance or $50,000  with a minimum loan amount of
         $1,000.  Loans are repayable  through payroll  deductions over periods
         ranging up to 60 months.  Participants  are  charged a $50 loan set-up
         fee with a $2 monthly  maintenance fee per loan. The loans are secured
         by a lien on the  borrower's  vested  account  balance in the Plan and
         bear interest at rates based on prevailing market conditions. Interest
         rates on  outstanding  loans at December 31, 2008 ranged from 4.96% to
         9.13%.

     PLAN TERMINATION

         Although it has not  expressed any intention to do so, the Company has
         the right to terminate the Plan  pursuant to  provisions  set forth by
         the Plan Document and subject to the provisions of ERISA. In the event
         of Plan  termination,  each  Participant's  account shall become fully
         vested and  Participants  will be entitled to  distributions  of their
         entire accounts.

     NEW ACCOUNTING PRONOUNCEMENTS

         In September  2006, the Financial  Accounting  Standards  Board issued
         Statement  of Financial  Accounting  Standards  (SFAS) No. 157,  "Fair
         Value Measurements." This statement defines fair value,  establishes a
         framework for measuring fair value under generally accepted accounting
         principles,  and expands  disclosures  about fair value  measurements.
         SFAS No. 157 is effective for financial  statements  issued for fiscal
         years  beginning  after  November 15, 2007. The provisions of SFAS No.
         157 are  effective  for the Plan  beginning  January 1, 2008,  and are
         reflected at Note 6.


                                      10


NOTE 3.   TAX STATUS

     The Plan  received a  favorable  determination  letter  from the  Internal
     Revenue  Service  dated  April  5,  2002,  stating  that  the Plan and its
     amendments are qualified under Section 401(a) of the Internal Revenue Code
     of 1986,  as amended  (the Code),  and the Trust is exempt  from  taxation
     under Section 501(a) of the Code. The Trust  established under the Plan to
     hold the Plan's assets is intended to qualify  pursuant to the appropriate
     section of the Internal  Revenue Code as a  tax-exempt  organization.  The
     Plan has been amended since receiving the determination  letter.  However,
     the Company and the Plan's tax counsel believe that the Trust continues to
     qualify and to operate as designed.


NOTE 4.   INVESTMENTS

     Investments that represent 5% or more of the net assets available for Plan
     benefits at December 31, 2008 and 2007 are as follows:

                                                     December 31,   December 31,
                                                         2008           2007
                                                      Fair Value     Fair Value
                                                    -------------  -------------

          Bond Fund of America A                      $2,886,524    $ 3,556,983
          EuroPacific Growth Fund A                    2,633,576      4,515,914
          Nexen Inc. Stock Fund                       11,126,459     17,622,506
          Schwab Stable Value Class S                  4,528,717              -
          Invesco Stable Value Fund                            -      5,680,702
          Third Avenue Value Fund                              -      3,027,274
          Washington Mutual Investors Fund A           3,598,463      5,320,310
          Growth Fund of America A                     2,410,347      3,957,948
          Oppenheimer Developing Markets                       -      3,164,594
          DWS Equity 500 Index S                       2,012,263      2,582,138


     During 2008 and 2007, the Plan's  investments  (including gains and losses
     on investments bought and sold, as well as held during the year) increased
     (decreased) in value by  $(19,211,763)  and $5,216,933,  respectively,  as
     follows:



                                         2008                          2007
                            ------------------------------  ----------------------------
                                            Realized and                  Realized and
                             Interest and    Unrealized     Interest and   Unrealized
                               Dividends    Gains (losses)    Dividends   Gains (losses)
                            -------------   --------------  ------------  --------------
                                                              
      Mutual funds             $1,390,669   $ (13,024,048)  $ 3,414,845   $  (1,110,899)
      Stock funds                  76,163      (7,717,085)       53,617       2,805,654
      Loans to Participants        62,538                        53,716



                                      11


NOTE 5.   PLAN AMENDMENTS

     On December 14, 2007,  the Tenth  Amendment to the Nexen  Savings Plan was
     executed  and adopted to permit cash  transfers  directly to the Plan from
     other qualified plans.  Effective December 31, 2007, Section III.G. of the
     Adoption  Agreement  was amended in its entirety to state  transfers  from
     other  plans into this Plan shall not be allowed  without  approval of the
     Benefit Plan Design Committee.

     On December 27, 2007, the Eleventh Amendment to the Nexen Savings Plan was
     executed and adopted. The purpose of the amendment was to allow, effective
     January  1,  2007,  certain  participants,  who are  part  of the  Reserve
     component  of the U.S.  Military  ordered  or called to active  duty after
     September  11,  2001 and before  December  31,  2007 to obtain a Qualified
     Distribution  for  a  non-spouse  beneficiary  to  rollover  funds  to  an
     inherited individual  retirement account; or for a participant to withdraw
     amounts from the plan for certain hardships of a primary  beneficiary.  In
     addition,  the plan was amended to reflect the  appointment of the Charles
     Schwab Trust Company as Trustee of the Plan,  replacing  Nationwide  Trust
     Company, FSB, effective April 5, 2007.

     On November 19, 2008, the Twelfth  Amendment to the Nexen Savings Plan was
     executed and  adopted.  The purpose of the  amendment  was to exclude from
     participation  in the Plan  employees  whose  base  salary  is paid on the
     payroll  of a foreign  Affiliate,  regardless  of whether a portion of the
     Employee's compensation or wages is also paid or provided by an Employer.

     On December 18, 2008, the  Thirteenth  Amendment to the Nexen Savings Plan
     was executed and adopted.  The purpose of the  amendment  was to 1) update
     the  employer's  address to the  location at 5601 Granite  Parkway,  Suite
     1400, in Plano, Texas 75024 and, 2) to bring the Plan into compliance with
     the gap period income provisions of the Pension Protection Act of 2006 and
     Code section 415 final regulations adopted by the Internal Revenue Service
     on April 5, 2007.


NOTE 6.   FAIR VALUE MEASUREMENT

     In September  2006,  the Financial  Accounting  Standards  Board  ("FASB")
     issued Statement of Financial  Accounting No. 157, FAIR VALUE MEASUREMENTS
     ("SFAS No. 157").  SFAS No. 157  introduces a framework for measuring fair
     value and expands  required  disclosure  about fair value  measurements of
     assets and liabilities.  SFAS No. 157 for financial assets and liabilities
     is effective for fiscal years  beginning after November 15, 2007. The Plan
     has adopted the standard for those assets and liabilities as of January 1,
     2008  and the  impact  of  adoption  was  not  material  to the  financial
     statements.  In November 2007, the FASB placed a one year deferral for the
     implementation  of SFAS No. 157 for  nonfinancial  assets and liabilities.
     Currently, the Plan does not have any nonfinancial assets or liabilities.


                                      12


NOTE 6.   FAIR VALUE MEASUREMENT - CONTINUED

     SFAS No.  157  defines  fair  value as the  exchange  price  that would be
     received  for an asset or paid to transfer a liability  (an exit price) in
     the principal or most advantageous market for the asset or liability in an
     orderly  transaction  between market participants on the measurement date.
     SFAS No. 157 also  establishes a fair value  hierarchy  which  requires an
     entity to maximize  the use of  observable  inputs and minimize the use of
     unobservable  inputs when  measuring  fair value.  The standard  describes
     three levels of inputs what may be used to measure fair value:

         LEVEL 1 -- Quoted  prices in active  markets for  identical  assets or
         liabilities.

         LEVEL 2 -- Observable  inputs other than Level 1 prices such as quoted
         prices for similar  assets or  liabilities;  quoted  prices in markets
         that are not active;  or other  inputs that are  observable  or can be
         corroborated by observable market data for substantially the full term
         of the assets or liabilities.

         LEVEL 3 -- Unobservable inputs that are supported by little or no
         market activity and that are significant to the fair value of the
         assets or liabilities.

     A financial instrument's level within the fair value hierarchy is based on
     the  lowest  level of any  input  that is  significant  to the fair  value
     measurement. The following is a description of the valuation methodologies
     used  for  instruments  measured  at fair  value,  including  the  general
     classification of such instruments pursuant to the valuation hierarchy.

     MUTUAL FUNDS

         These investments are public investment  vehicles valued using the Net
         Asset Value (NAV) provided by the  administrator  of the fund. The NAV
         is based on the  value of the  underlying  assets  owned by the  fund,
         minus  its  liabilities,  and then  divided  by the  number  of shares
         outstanding.  The  NAV is a  quoted  price  in an  active  market  and
         classified within level 1 of the valuation hierarchy.

     COLLECTIVE INVESTMENT TRUST

         These investments are public investment  vehicles valued using the NAV
         provided  by the  administrator  of the fund.  The NAV is based on the
         value  of  the  underlying   assets  owned  by  the  fund,  minus  its
         liabilities, and then divided by the number of shares outstanding. The
         NAV is classified  within level 2 of the valuation  hierarchy  because
         the NAV's unit price is quoted on a private market that is not active;
         however,  the unit price is based on underlying  investments which are
         traded on an active market.

     NEXEN INC. COMMON STOCK

         Nexen Inc common stock is valued at the closing price  reported on the
         New York Stock  Exchange  Composite  Listing and is classified  within
         Level 1 of the valuation hierarchy.


                                      13


NOTE 6.   FAIR VALUE MEASUREMENT - CONTINUED

     MONEY MARKET FUNDS

         These investments are public  investment  vehicles valued using $1 for
         the NAV. The money market funds are  classified  within Level 2 of the
         valuation hierarchy.

     LOANS TO PARTICIPANTS

         Loans to Plan  participants are valued at cost plus accrued  interest,
         which approximates fair value and are classified within Level 3 of the
         valuation hierarchy.

     Below are the  Plan's  financial  instruments  carried  at fair value on a
     recurring  basis by the FAS 157 fair value hierarchy  levels  described in
     Note 6:



                                                                                       AS OF DECEMBER 31, 2008
                                                                ----------------------------------------------------------------
                                                                  QUOTED PRICES
                                                                    IN ACTIVE         SIGNFICANT    SIGNIFICANT
                                                                   MARKETS FOR        OBSERVABLE    UNOBSERVABLE
                                                                INDENTICAL ASSETS       INPUTS         INPUTS          TOTAL
                                                                    (LEVEL 1)         (LEVEL 2)      (LEVEL 3)      FAIR VALUE
                                                                -----------------  ---------------  -------------  -------------
                                                                                                       
        Assets:
             Common stock - Nexen                                  $ 11,126,459       $         -     $       -     $11,126,459
             Mutual funds                                            21,468,877                 -             -      21,468,877
             Collective investment trusts (Stable value fund)                 -         4,528,717             -       4,528,717
             Money market fund                                                -           568,678             -         568,678
             Participant loans                                                -                 -       808,274         808,274

                                                                -----------------  ---------------  -------------  -------------
                 Total assets                                      $ 32,595,336       $ 5,097,395     $ 808,274     $38,501,005
                                                                =================  ===============  =============  =============


     The table below sets forth a summary of changes in the fair value of the
     Plan's Level 3 investment assets and liabilities for the year ended
     December 31, 2008:



                                                             AS OF DECEMBER 31, 2008
                                                                          SALES, ISSUANCES,   TRANSFERS
                                                   ITEMS       GAINS        MATURITIES,       IN OR OUT   ENDING
                              BEGINNING FAIR    INCLUDED IN  (LOSSES) IN   SETTLEMENTS,      OF LEVEL 3,   FAIR
                                 VALUE          NET INCOME      OCI         CALLS, NET           NET       VALUE
                                                                                        
       Participant Loans            $ 761,928           $ -        $ -            $ 46,346           $ -  $ 808,274
                              ---------------  ------------  -----------  -----------------  -----------  ---------
       Total                        $ 761,928           $ -        $ -            $ 46,346           $ -  $ 808,274
                              ===============  ============  ===========  =================  ===========  =========



                                   14


NOTE 7.   DOL INQUIRY

     In 2008 the  Department  of Labor  conducted  an audit of the  Plan.  In a
     letter dated May 9, 2009, the  Department of Labor noted several  possible
     violations and requested further information and comment.  The Company has
     since responded to the Department of Labor with additional information and
     an  explanation  of why it believes no  violations  occurred.  The Company
     believes the final resolution will not negatively impact the plan.

NOTE 8.   RECONCILIATION OF FINANCIAL STATEMENTS TO SCHEDULE H OF FORM 5500

     The following is a reconciliation of net assets available for benefits and
     changes in net assets available for benefits per the financial  statements
     to Schedule H of Form 5500 for the years ending:



                                                                                          2008             2007
                                                                                   ---------------  --------------
                                                                                               
Net assets available for benefits per financial statements                           $ 38,771,592    $ 58,793,320
Adjustment from contract value to fair value not reported
     on Schedule H of Form 5500                                                          (219,680)        (39,594)
                                                                                   ---------------  --------------
Net assets available for benefits per Schedule H of
     Form 5500                                                                       $ 38,551,912    $ 58,753,726
                                                                                   ===============  ==============

Increase (Decrease) in net assets available for benefits per financial statements   $ (20,021,728)    $ 3,588,978
Adjustment from contract value to fair value reported
     on Schedule H of Form 5500                                                          (180,086)        (39,594)
Transfers of assets into or out of this Plan included in increase in net
     assets available for benefits per financial statements but not
     included in net income per Schedule H of Form 5500                                   (64,116)      1,928,109
                                                                                   ---------------  --------------


Net gain (loss) per Schedule H of Form 5500                                         $ (20,265,930)    $ 5,477,493
                                                                                   ===============  ==============



NOTE 9.   SUBSEQUENT EVENTS

     Effective  March 12, 2009, the Company  transferred the assets held in the
     Bond Fund of America A to  Vanguard  Total Bond Index  Signal,  which is a
     similar type investment option.

     Effective  July  8,  2009,  the  Company  will  convert  from  a  unitized
     accounting  method  for  the  Nexen  Inc.  Stock  Fund to a  market  share
     accounting methodology.

     Pending Board approval,  effective January 1, 2010, the Company will merge
     the  Nexen  Savings  Plan and the Nexen  Pension  Plan.  There  will be no
     changes to or reduction in benefits for Plan participants.


                                      15







                             SUPPLEMENTAL SCHEDULE















                               NEXEN SAVINGS PLAN
         SCHEDULE H, LINE 4I - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
                                EIN: 06-0944810
                                PLAN NUMBER 001
                               DECEMBER 31, 2008

(a)                (b)                                       (c)                        (d)            (e)
                                             DESCRIPTION OF INVESTMENT INCLUDING
         IDENTITY OF ISSUER, BORROWER         MATURITY DATE, RATE OF INVESTMENT,                     CURRENT
           LESSOR, OR SIMILAR PARTY          COLLATERAL, PAR, OR MATURITY VALUE         COST #        VALUE
- ---- --------------------------------------  --------------------------------------  ------------  ------------
                                                                                          
PARTICIPANT-DIRECTED INVESTMENTS:

     The American Funds Group                Bond Fund of America A,
                                                  Net Asset Value $10.76                            $ 2,886,524

     The American Funds Group                Washington Mutual Investors Fund A,
                                                  Net Asset Value $21.41                              3,598,463

     The American Funds Group                EuroPacific Growth Fund A,
                                                  Net Asset Value $28.01                              2,633,576

     American Beacon                         American Beacon Small Cap Value Plan
                                                  Net Asset Value $11.52                                992,214

     DWS Investments                         DWS Equity 500 Index Fund,
                                                  Net Asset Value $101.24                             2,012,263

     First Eagle Funds                       First Eagle Overseas Fund A,
                                                  Net Asset Value $16.62                              1,479,623

     Royce Funds                             Royce Value Service Fund,
                                                  Net Asset Value $7.00                               1,261,844

     The American Funds Group                Growth Fund of America A,
                                                  Net Asset Value $20.48                              2,410,347

     Third Avenue Funds                      Third Avenue Value Fund,
                                                  Net Asset Value $32.86                              1,155,493

     American Century Investments            American Century Real Estate Investment Fund,
                                                  Net Asset Value $11.66                              1,385,697

     Oppenheimer Funds                       Oppenheimer Developing Markets Fund A,
                                                  Net Asset Value $15.89                              1,652,833

     The American Funds Group                Cash Management Trust Of America,
                                                  Net Asset Value $1.00                                 568,678

     Schwab Funds                            Schwab Stable Value Class S,
                                                  Net Asset Value $18.30                              4,528,717

     Chase Bank, NA                          Cash                                                       197,139

*    Nexen Inc.                              Nexen Inc. Stock Fund,
                                                ( Nexen Inc. Stock, no par,
                                                  Net Asset Value $17.58  )                          11,126,459

*    Loans to Participants                   Interest Rates From 4.96% to 9.13%                         808,274
                                                                                                 ---------------

                                                                                                   $ 38,698,144
                                                                                                 ===============

*   Indicates each identified person/entity known to be party-in-interest.

#   Historical   cost   information   omitted  as  it  is  not   required   for
    participant-directed investments.

    This  supplemental  schedule lists assets held for  investment  purposes at
    December  31,  2008,  as required by the  Department  of Labor's  Rules and
    Regulations for Reporting and Disclosure.




                                       16


                                   SIGNATURES

          THE PLAN. Pursuant to the requirements of the Securities Exchange Act
of 1934, Nexen Petroleum  U.S.A.  Inc. has duly caused this annual report to be
signed on its behalf by the undersigned hereunto duly authorized.

DATED:  June 25, 2009

                                          NEXEN SAVINGS PLAN

                                          By:  Nexen Petroleum U.S.A. Inc.


                                          By:  /s/ Brian C. Reinsborough
                                               --------------------------------
                                               Brian C. Reinsborough, President







                               INDEX TO EXHIBITS


        EXHIBIT
        NUMBER                   DESCRIPTION OF EXHIBITS
        ------                   -----------------------

           1               Consent of Weaver & Tidwell, L.L.P.