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


                                    FORM 8-K


                             CURRENT REPORT PURSUANT
                          TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

      Date of report (Date of earliest event reported)    October 15, 2007


                                   NEXEN INC.
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             (Exact Name of Registrant as Specified in Its Charter)


                                     CANADA
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                 (State or Other Jurisdiction of Incorporation)


                  1-6702                                 98-6000202
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         (Commission File Number)             (IRS Employer Identification No.)


             801 - 7TH AVENUE S.W.
           CALGARY, ALBERTA, CANADA                              T2P 3P7
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     (Address of Principal Executive Offices)                   (Zip Code)


                                 (403) 699-4000
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              (Registrant's Telephone Number, Including Area Code)


                                 NOT APPLICABLE
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          (Former Name or Former Address, if Changed Since Last Report)

     Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (SEE General Instruction A.2. below):

     [_] Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)

     [_] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17
CFR 240.14a-12)

     [_] Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b))

     [_] Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c))

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ITEM 5.02.    DEPARTURE  OF  DIRECTORS   OR  CERTAIN   OFFICERS;   ELECTION  OF
DIRECTORS;  APPOINTMENT  OF  CERTAIN  OFFICERS;  COMPENSATORY  ARRANGEMENTS  OF
CERTAIN OFFICERS.

         On November 1, 2007, Douglas B. Otten,  Senior Vice President,  United
States Oil and Gas, of Nexen Inc.  will be  retiring.  Mr.  Otten has held this
position since 1998.





                                   SIGNATURE

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report on Form 8-K to be signed on its
behalf by the undersigned, thereunto duly authorized.


Dated: October 18, 2007


                                            NEXEN INC.


                                            By: /s/ Sylvia L. Groves
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                                            Name:   Sylvia L. Groves
                                            Title:  Assistant Secretary