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 18, 2003




                        PIONEER NATURAL RESOURCES COMPANY
                       -----------------------------------
             (Exact name of Registrant as specified in its charter)



          DELAWARE                      1-13245               75-2702753
-------------------------------       -----------       ----------------------
(State or other jurisdiction of       Commission           (I.R.S. Employer
incorporation or organization)        File Number       Identification Number)



5205 N. O'CONNOR BLVD., SUITE 1400, IRVING, TEXAS               75039
-------------------------------------------------             ----------
    (Address of principal executive offices)                  (Zip code)


       Registrant's Telephone Number, including area code : (972) 444-9001

                                 Not applicable
              (Former name, former address and former fiscal year,
                          if changed since last report)







                        PIONEER NATURAL RESOURCES COMPANY

                                TABLE OF CONTENTS


                                                                       Page

Item 7.  Financial Statements, Pro Forma Financial
         Information and Exhibits:

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

Item 9.  Regulation FD Disclosure.................................      3

Signatures........................................................      4

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


                                       2










                        PIONEER NATURAL RESOURCES COMPANY


ITEM 7.      FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS

       (c)   Exhibits

             99.1   News Release dated August 18, 2003

ITEM 9.      REGULATION FD DISCLOSURE

       The information in this document includes forward-looking statements that
are made  pursuant  to the Safe  Harbor  Provisions  of the  Private  Securities
Litigation  Reform Act of 1995.  Forward-looking  statements,  and the  business
prospects of Pioneer Natural Resources Company (the "Company"), are subject to a
number of risks and  uncertainties  which may cause the Company's actual results
in future  periods to differ  materially  from the  forward-looking  statements.
These risks and uncertainties include, among other things, volatility of oil and
gas prices, product supply and demand, competition, international operations and
associated   international   political  and  economic  instability,   government
regulation  or  action,  litigation,  the  costs and  results  of  drilling  and
operations,  the Company's ability to replace reserves or implement its business
plans, access to and cost of capital, uncertainties about estimates of reserves,
quality of  technical  data,  environmental  and weather  risks,  acts of war or
terrorism. These and other risks are described in the Company's Annual Report on
Form 10-K and Quarterly Reports on Form 10-Q that are available from the Company
or the Securities and Exchange Commission.

       On August 18,  2003,  the Company issued a news  release that is attached
hereto as exhibit  99.1. In the news release,  the Company  announced,  together
with other related  information,  (i) that oil production has commenced from the
Sable field  offshore  South Africa and that the Company's  first oil sales from
South Africa are  anticipated in September or October 2003;  (ii) a discovery on
the Company's  Tomahawk  prospect in the Falcon Corridor in the East Breaks area
of the deepwater Gulf of Mexico;  and (iii) that the Company  participated  in a
successful development well in the Adam field in Tunisia.

                                       3









                        PIONEER NATURAL RESOURCES COMPANY

                               S I G N A T U R E S

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:  August 18, 2003         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*                News Release dated August 18, 2003

-------------
* filed herewith

                                       5