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): January 5, 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


                                       2








                        PIONEER NATURAL RESOURCES COMPANY


Item 7.01.   Regulation FD Disclosure

     On January 5, 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  production  from the Canyon  Express gas
system was shut in during  early  December as a result of a leak in the methanol
delivery  system.  The impact to the  Company's  fourth  quarter  average  daily
production is expected to be approximately 5,000 barrels oil equivalent ("BOE"),
leaving  total  production  for the  quarter  at the lower end of the  Company's
forecasted production range of 190,000 to 205,000 BOE per day.

Item 9.01.   Financial Statements and Exhibits

     (c)   Exhibits

           99.1   News Release dated January 5, 2005.


                                       3











                        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:  January 5, 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 January 5, 2005.


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



                                       5