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): September 7, 2004




                        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 September 7, 2004,  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  (i) that it has shut in  production  from the
Harrier field in the Falcon Corridor of the deepwater Gulf of Mexico as a result
of water  encroachment,  (ii) plans to spud a sidetrack well in mid-September to
access an adjacent fault block in the Harrier  field,  (iii) plans to initiate a
drilling  campaign in the Falcon  Corridor during the first half of 2005, (iv) a
reduction in expected total Company  production for the third quarter of 2004 to
average  180,000 to 185,000  barrels oil equivalent per day and (v) an update on
Argentine government oil price initiatives.

Item 9.01.   Financial Statements and Exhibits

             (c)   Exhibits

                   99.1    News Release dated September 7, 2004.



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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: September 7, 2004         By:  /s/ Richard P. Dealy
                                    -------------------------------------------
                                    Richard P. Dealy
                                    Vice President and Chief Accounting Officer







                                       4








                        PIONEER NATURAL RESOURCES COMPANY

                                  EXHIBIT INDEX



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

  99.1(a)           News Release dated September 7, 2004.


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




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