8-K

                                  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):  August 9, 2005


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


                                     CANADA
- --------------------------------------------------------------------------------
                 (State or Other Jurisdiction of Incorporation)


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


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


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


                                 NOT APPLICABLE
- --------------------------------------------------------------------------------
          (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))




Item 2.01.   Completion of Acquisition or Disposition of Assets.

             On August 9, 2005, Nexen Inc. (Nexen) completed the disposition of
conventional oil and gas properties in southeast Saskatchewan, northwest
Saskatchewan, northeast British Columbia and the Alberta foothills for
approximately Cdn$945 million before closing adjustments, as previously
announced on July 4, 2005.

             The disposition was structured as four transactions involving the
sale of the shares of the Nexen affiliated partnerships that owned the
properties to arms length third parties as set forth below.

1.   On July 11, 2005, Nexen sold 74,008 net acres of oil and gas properties
with production of approximately 6,239 BOE/d in the Findley area, Alberta to
Talisman Energy Inc. for cash proceeds of Cdn$150,000,000.

2.   On August 2, 2005, Nexen sold 78,387 net acres of oil and gas properties
with production of approximately 5,342 BOE/d located in the Hay River area,
British Columbia to Harvest Energy Trust for cash proceeds of Cdn$260,000,000.

3.   On August 4, 2005, Nexen sold 232,002 net acres of oil and gas properties
with production of approximately 4,778 BOE/d located in northwest Saskatchewan
to NuVista Energy Ltd. for cash proceeds of Cdn$205,000,000.

4.   On August 9, 2005, Nexen sold 66,034 net acres of oil and gas properties
with production of approximately 6,239 BOE/d located in southeast Saskatchewan
to Starpoint Commercial Trust and Starpoint Energy Ltd. for cash proceeds of
Cdn$330,000,000.

             There was no material relationship between Nexen and any purchaser
outlined above, nor any respective director or officer of or associates of any
purchaser. In all cases the purchase price and the nature of payment was
determined by arms length negotiations between Nexen and the respective
purchasers and were not determined in accordance with any set formula.

             The proceeds from the dispositions were used to pay down debt
associated with the acquisition of assets located in the North Sea in December
2004.

             On July 4, 2005, Nexen Inc. issued the press release attached as
Exhibit 99.1 hereto.



ITEM 9.01.   FINANCIAL STATEMENTS AND EXHIBITS.

The following Exhibit is filed as part of this report:

             99.1     Press Release of Nexen Inc, dated July 4, 2005





                                    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:  August 15, 2005

                                          NEXEN INC.


                                          By: /s/ Rick C. Beingessner
                                              ---------------------------------
                                          Name:   Rick C. Beingessner
                                          Title:  Assistant Secretary





                                  EXHIBIT INDEX


EXHIBIT
NUMBER          DESCRIPTION
- -------         -----------

  99.1          Press Release of Nexen Inc, dated July 4, 2005

EX-99

                                                                    EXHIBIT 99.1
                                                                    ------------

                              [NEXEN LOGO OMITTED]

                                   NEXEN INC.
                                801 - 7th Ave SW
                           Calgary, AB Canada T2P 3P7
                                 T 403 699-4000
                                 F 403 699-5776
                                www.nexeninc.com

                                  NEWS RELEASE


NEXEN SELLS CANADIAN OIL AND GAS PROPERTIES FOR $946 MILLION

CALGARY, July 4, 2005 /PRNewswire-FirstCall via COMTEX/ -- Nexen Inc. is
finalizing agreements to sell conventional oil and gas properties in southeast
Saskatchewan, northwest Saskatchewan, northeast British Columbia and the Alberta
foothills for approximately $946 million before closing adjustments. At December
31, 2004, the properties had proved reserves of approximately 49 million boe and
proved plus probable of 64 million boe. In the first quarter of 2005, the
properties produced 18,300 boe/d and generated approximately $47 million of cash
flow. The sales are expected to close this summer with a gain totaling
approximately $300 million (before tax) in the third quarter. No current taxes
will be payable on these transactions.

"We are pleased with the value for the oil and gas assets and the progress on
monetizing of our chemicals division," said Charlie Fischer, Nexen's President
and CEO. "Proceeds will reduce the debt we incurred when purchasing Buzzard and
other assets in the North Sea in late-2004. Buzzard will come onstream in
late-2006, and at its peak, will add approximately 85,000 boe/d of production
and $1.4 billion in annual cash flow, assuming a US$40/bbl WTI."

Nexen Inc. is an independent, Canadian-based global energy and chemicals
company, listed on the Toronto and New York stock exchanges under the symbol
NXY. We are uniquely positioned for growth in the UK North Sea, deep-water Gulf
of Mexico, Athabasca oil sands of Alberta, 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. Tristone Capital and TD Securities acted as advisors
to Nexen on this transaction.

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
Long Lake, North Sea and West Africa 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,
changes in environmental and other laws and regulations; renegotiations of
contracts; and political uncertainty, including actions by insurgent or other
armed groups or other conflict. 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 commerciality, development plans,
capacity expansions, drilling of new wells, ultimate recoverability of reserves,
future production rates, cash flows or ability to execute on the disposition of
assets or businesses, 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 2004 Annual Report on Form 10-K for further discussion of the
risk factors.

Cautionary Note to U.S. 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.

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 2004
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 nor to convey specific advice. Reserve
estimation is highly technical and requires professional collaboration and
judgement. 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.

SOURCE Nexen Inc.

Kevin Finn, Vice President, Investor Relations and Corporate Communications,
(403) 699-5166; Grant Dreger, CA, Manager, Investor Relations, (403) 699-5273;
801 - 7th Ave SW, Calgary, Alberta, Canada, T2P 3P7, www.nexeninc.com

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