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): June 16, 2005




                        Pioneer Natural Resources Company
             ------------------------------------------------------
             (Exact name of Registrant as specified in its charter)



          Delaware                     1-13245                75-2702753
- ----------------------------         ------------        -------------------
(State or other jurisdiction         (Commission          (I.R.S. Employer
     of incorporation)               File Number)        Identification No.)



5205 N. O'Connor Blvd., Suite 900, Irving, Texas                75039
- ------------------------------------------------             ----------
   (Address of principal executive offices)                  (Zip Code)


                                 (972) 444-9001
              ----------------------------------------------------
              (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:

| | 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))








                        PIONEER NATURAL RESOURCES COMPANY

                                TABLE OF CONTENTS


                                                                       Page

Item 7.01.  Regulation FD Disclosure..............................      3

Item 9.01.  Financial Statements and Exhibits

            (c)   Exhibits........................................      3

Signature.........................................................      4

Exhibit Index.....................................................      5



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                        PIONEER NATURAL RESOURCES COMPANY

Item 7.01.   Regulation FD Disclosure

     On June 16, 2005,  Pioneer Natural Resources Company (the "Company") issued
a news release that is attached hereto as exhibit 99.1. In the news release, the
Company  announced  that it has agreed to sell its  interest  in the Olowi block
offshore   Gabon  to  an   undisclosed   party  for  expected  net  proceeds  of
approximately $49 million. The transaction is expected to close during the third
quarter of 2005 and is subject to government  agreement as to certain provisions
of the associated production sharing contract and normal closing conditions.  As
a result of this  agreement,  Pioneer will reverse its  previously  recorded tax
benefit of $27 million  associated  with the  decision to exit Gabon made during
the fourth  quarter of 2004.  The  reversal  will be recorded  as  deferred  tax
expense during the second quarter of 2005. The gain on sale of approximately $49
million will be recorded  upon  closing,  expected  during the third  quarter of
2005.

Item 9.01.   Financial Statements and Exhibits

       (c)   Exhibits

           99.1   News Release dated June 16, 2005.



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                        PIONEER NATURAL RESOURCES COMPANY

                                S I G N A T U R E

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                              PIONEER NATURAL RESOURCES COMPANY




Date:  June 20, 2005          By:     /s/ Darin G. Holderness
                                    -------------------------------------------
                                    Darin G. Holderness
                                    Vice President and Chief Accounting Officer



                                       4








                        PIONEER NATURAL RESOURCES COMPANY

                                  EXHIBIT INDEX


Exhibit No.             Description
- -----------             -----------

   99.1(a)              News Release dated June 16, 2005.


- ------------------
(a) filed herewith




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