UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 10-Q


             / x / QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                For the quarterly period ended September 30, 2005

                                       or

              / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
               For the transition period from _______ to ________


                         Commission File Number: 1-13245


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


                  Delaware                                   75-2702753
       -------------------------------                  -------------------
       (State or other jurisdiction of                    (I.R.S. Employer
       incorporation or organization)                   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, former address and former fiscal year,
                          if changed since last report)

Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  Registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                                Yes / x / No / /

Indicate  by check mark  whether  the  Registrant  is an  accelerated  filer (as
defined in Rule 12b-2 of the Exchange Act).

                                Yes / x / No / /

Indicate by check mark whether the  Registrant is a shell company (as defined in
Rule 12b-2 of the Exchange Act).

                                Yes / / No / x /


Number of shares of Common Stock outstanding as of
November 4, 2005..................................................   128,531,071






                        PIONEER NATURAL RESOURCES COMPANY

                                TABLE OF CONTENTS

                                                                         Page

Definitions of Certain Terms and Conventions Used Herein..............     3

                          PART I. FINANCIAL INFORMATION

Item 1.        Financial Statements

               Consolidated Balance Sheets as of September 30, 2005
                  and December 31, 2004...............................     4

               Consolidated Statements of Operations for the three
                  and nine months ended September 30, 2005 and 2004...     6

               Consolidated Statement of Stockholders' Equity for
                  the nine months ended September 30, 2005............     7

               Consolidated Statements of Cash Flows for the three
                  and nine months ended September 30, 2005 and 2004...     8

               Consolidated Statements of Comprehensive Loss for
                  the three and nine months ended September 30, 2005
                  and 2004............................................     9

               Notes to Consolidated Financial Statements.............    10

Item 2.        Management's Discussion and Analysis of Financial
               Condition and Results of Operations....................    34

Item 3.        Quantitative and Qualitative Disclosures About
               Market Risk............................................    49

Item 4.        Controls and Procedures................................    51

                           PART II. OTHER INFORMATION

Item 1.        Legal Proceedings......................................    51

Item 2.        Unregistered Sales of Equity Securities and
               Use of Proceeds........................................    52

Item 6.        Exhibits...............................................    53

Signatures     .......................................................    54

Exhibit Index  .......................................................    55

Cautionary Statement Concerning Forward-Looking Statements

     The  information   included  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  ("Pioneer"  or 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,  the  ability to obtain  environmental  and other  permits  and the
timing thereof, other government regulation or action,  international operations
and associated international political and economic instability,  legal actions,
the costs and  results of  drilling  and  operations,  availability  of drilling
equipment,  the Company's  ability to replace  reserves,  implement its business
plans, or complete its development projects as scheduled,  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 2004 Annual Report on Form 10-K and other filings
with the SEC.


                                        2





            Definitions of Certain Terms and Conventions Used Herein


     Within this report,  the  following  terms and  conventions  have  specific
meanings:

o    "Bbl" means a standard barrel containing 42 United States gallons.
o    "Bcf" means billion cubic feet.
o    "BOE" means a barrel of oil equivalent and is a standard convention used to
     express oil and gas  volumes on a  comparable  oil  equivalent  basis.  Gas
     equivalents  are  determined  under the relative  energy  content method by
     using the ratio of 6.0 Mcf of gas to 1.0 Bbl of oil or natural gas liquid.
o    "BOEPD" means BOE per day.
o    "Btu"  means  British  thermal  unit,  which is a measure  of the amount of
     energy  required to raise the  temperature of one pound of water one degree
     Fahrenheit.
o    "LIBOR"  means London  Interbank  Offered  Rate,  which is a market rate of
     interest.
o    "Mcf" means one thousand cubic feet and is a measure of natural gas volume.
o    "MMBbl" means one million Bbls.
o    "MMBOE" means one million BOEs.
o    "MMBtu" means one million Btus.
o    "NGL" means natural gas liquid.
o    "NYMEX" means the New York Mercantile Exchange.
o    "proved  reserves" mean the estimated  quantities of crude oil, natural gas
     and natural gas liquids which  geological and engineering  data demonstrate
     with  reasonable  certainty  to be  recoverable  in future years from known
     reservoirs under existing economic and operating  conditions,  i.e., prices
     and costs as of the date the estimate is made. Prices include consideration
     of changes in existing  prices  provided only by contractual  arrangements,
     but not on escalations based upon future conditions.
         (i) Reservoirs  are  considered  proved  if  economic  producibility is
     supported by either actual  production or conclusive  formation  test.  The
     area of a reservoir  considered proved includes (A) that portion delineated
     by drilling and defined by gas-oil and/or oil-water  contacts,  if any; and
     (B) the immediately  adjoining  portions not yet drilled,  but which can be
     reasonably  judged as  economically  productive  on the basis of  available
     geological  and  engineering  data. In the absence of  information on fluid
     contacts,  the lowest known structural  occurrence of hydrocarbons controls
     the lower proved limit of the reservoir.
         (ii) Reserves which can be produced economically through application of
     improved recovery  techniques (such as fluid injection) are included in the
     "proved"  classification when successful testing by a pilot project, or the
     operation of an installed  program in the reservoir,  provides  support for
     the engineering analysis on which the project or program was based.
         (iii) Estimates of  proved reserves do  not include the  following: (A)
     oil that may become  available  from  known  reservoirs  but is  classified
     separately as "indicated additional  reserves";  (B) crude oil, natural gas
     and natural gas  liquids,  the  recovery of which is subject to  reasonable
     doubt because of uncertainty as to geology,  reservoir  characteristics  or
     economic factors; (C) crude oil, natural gas and natural gas liquids,  that
     may occur in  undrilled  prospects;  and (D)  crude  oil,  natural  gas and
     natural gas liquids, that may be recovered from oil shales, coal, gilsonite
     and other such sources.
o    "SEC" means the United States Securities and Exchange Commission.
o    With  respect to  information  on the working  interest in wells,  drilling
     locations  and  acreage,  "net"  wells,  drilling  locations  and acres are
     determined by multiplying  "gross" wells,  drilling  locations and acres by
     the Company's working interest in such wells,  drilling locations or acres.
     Unless  otherwise   specified,   wells,   drilling  locations  and  acreage
     statistics  quoted  herein  represent  gross wells,  drilling  locations or
     acres.
o    Unless  otherwise  indicated,  all currency  amounts are  expressed in U.S.
     dollars.


                                        3





                          PART I. FINANCIAL INFORMATION

Item 1.    Financial Statements

                        PIONEER NATURAL RESOURCES COMPANY

                           CONSOLIDATED BALANCE SHEETS
                                 (in thousands)


                                                                         September 30,   December 31,
                                                                              2005           2004
                                                                         ------------    -----------
                                                                         (Unaudited)
                                     ASSETS
                                                                                   
Current assets:
  Cash and cash equivalents...........................................   $    64,508     $     7,257
  Accounts receivable:
     Trade, net of allowance for doubtful accounts of $5,650
       and $5,409 as of September 30, 2005 and December 31, 2004,
       respectively...................................................       257,086         209,297
     Due from affiliates..............................................           871             639
  Inventories.........................................................        65,094          40,332
  Prepaid expenses....................................................        18,504          10,822
  Deferred income taxes...............................................       233,562         115,206
  Other current assets:
     Derivatives......................................................           888             209
     Other, net of allowance for doubtful accounts of $6,425 as
       of September 30, 2005 and December 31, 2004....................         9,123           9,663
                                                                          ----------      ----------
          Total current assets........................................       649,636         393,425
                                                                          ----------      ----------
Property, plant and equipment, at cost:
  Oil and gas properties, using the successful efforts method
   of accounting:
     Proved properties................................................     8,096,569       7,654,181
     Unproved properties..............................................       502,984         470,435
  Accumulated depletion, depreciation and amortization................    (2,478,043)     (2,243,549)
                                                                          ----------      ----------
          Total property, plant and equipment.........................     6,121,510       5,881,067
                                                                          ----------      ----------
Deferred income taxes.................................................           -             2,963
Goodwill..............................................................       306,666         315,880
Other property and equipment, net.....................................        89,617          78,696
Other assets:
  Derivatives.........................................................           997             -
  Other, net of allowance for doubtful accounts of $92 as of
     September 30, 2005 and December 31, 2004.........................        59,187          56,436
                                                                          ----------      ----------
                                                                         $ 7,227,613     $ 6,728,467
                                                                          ==========      ==========



 The financial information included as of September 30, 2005 has been prepared
    by management without audit by independent registered public accountants.

              The accompanying notes are an integral part of these
                       consolidated financial statements.


                                        4





                        PIONEER NATURAL RESOURCES COMPANY

                     CONSOLIDATED BALANCE SHEETS (Continued)
                        (in thousands, except share data)


                                                                         September 30,   December 31,
                                                                             2005            2004
                                                                         ------------    -----------
                                                                         (Unaudited)

                      LIABILITIES AND STOCKHOLDERS' EQUITY
                                                                                   
Current liabilities:
  Accounts payable:
     Trade............................................................   $   262,698     $   205,153
     Due to affiliates................................................        10,843          10,898
  Interest payable....................................................        21,493          45,735
  Income taxes payable................................................        19,125          13,520
  Other current liabilities:
     Derivatives......................................................       575,060         224,612
     Deferred revenue.................................................       165,063             -
     Other............................................................        77,894          44,541
                                                                          ----------      ----------
          Total current liabilities...................................     1,132,176         544,459
                                                                          ----------      ----------

Long-term debt........................................................     1,939,296       2,385,950
Derivatives...........................................................       520,324         182,803
Deferred income taxes.................................................       618,343         607,415
Deferred revenue......................................................       711,669             -
Other liabilities and minority interests..............................       181,555         176,060
Stockholders' equity:
  Common stock, $.01 par value: 500,000,000 shares authorized;
     146,955,674 and 145,644,828 shares issued as of
     September 30, 2005 and December 31, 2004, respectively...........         1,470           1,456
  Additional paid-in capital..........................................     3,775,385       3,705,286
  Treasury stock, at cost: 13,544,015 and 813,166 shares as of
     September 30, 2005 and December 31, 2004, respectively...........      (635,293)        (27,793)
  Deferred compensation...............................................       (53,261)        (22,558)
  Accumulated deficit.................................................      (323,978)       (634,146)
  Accumulated other comprehensive income (loss):
     Net deferred hedge losses, net of tax............................      (698,660)       (241,350)
     Cumulative translation adjustment................................        58,587          50,885
                                                                          ----------      ----------
          Total stockholders' equity..................................     2,124,250       2,831,780
Commitments and contingencies
                                                                          ----------      ----------
                                                                         $ 7,227,613     $ 6,728,467
                                                                          ==========      ==========




 The financial information included as of September 30, 2005 has been prepared
    by management without audit by independent registered public accountants.

              The accompanying notes are an integral part of these
                       consolidated financial statements.

                                        5





                        PIONEER NATURAL RESOURCES COMPANY

                      CONSOLIDATED STATEMENTS OF OPERATIONS
                      (in thousands, except per share data)
                                   (Unaudited)





                                                       Three months ended         Nine months ended
                                                          September 30,              September 30,
                                                     ----------------------    ------------------------
                                                       2005         2004          2005          2004
                                                     ---------    ---------    ----------    ----------
                                                                                 
Revenues and other income:
  Oil and gas......................................  $ 558,382    $ 425,575    $1,593,470    $1,265,744
  Interest and other...............................      9,460        1,212        85,689         4,557
  Gain (loss) on disposition of assets, net........        394          215         2,763           (30)
                                                      --------     --------     ---------     ---------
                                                       568,236      427,002     1,681,922     1,270,271
                                                      --------     --------     ---------     ---------
Costs and expenses:
  Oil and gas production...........................    118,422       75,095       330,871       222,707
  Depletion, depreciation and amortization.........    136,367      135,459       431,760       405,758
  Impairment of long-lived assets..................         21       34,825           644        34,825
  Exploration and abandonments.....................     64,198       32,882       183,671       152,233
  General and administrative.......................     32,749       19,431        91,551        54,846
  Accretion of discount on asset retirement
    obligations....................................      1,968        2,030         6,210         6,012
  Interest.........................................     29,268       24,827        92,731        67,805
  Other............................................     38,173        2,486        67,475        10,982
                                                      --------     --------     ---------     ---------
                                                       421,166      327,035     1,204,913       955,168
                                                      --------     --------     ---------     ---------
Income from continuing operations before
  income taxes.....................................    147,070       99,967       477,009       315,103
Income tax provision...............................    (42,483)     (22,893)     (193,722)     (113,688)
                                                      --------     --------     ---------     ---------

Income from continuing operations..................    104,587       77,074       283,287       201,415
Income from discontinued operations, net of tax....     18,986        3,842       110,502         9,391
                                                      --------     --------     ---------     ---------
Net income.........................................  $ 123,573    $  80,916    $  393,789    $  210,806
                                                      ========     ========     =========     =========
Basic earnings per share:
  Income from continuing operations................  $     .76    $     .65    $     2.02    $     1.70
  Income from discontinued operations, net of tax..        .14          .03           .78           .08
                                                      --------     --------     ---------     ---------
  Net income.......................................  $     .90    $     .68    $     2.80    $     1.78
                                                      ========     ========     =========     =========
Diluted earnings per share:
  Income from continuing operations................  $     .74    $     .64    $     1.97    $     1.67
  Income from discontinued operations, net of tax..        .14          .03           .77           .08
                                                      --------     --------     ---------     ---------
  Net income.......................................  $     .88    $     .67    $     2.74    $     1.75
                                                      ========     ========     =========     =========
Weighted average shares outstanding:
  Basic............................................    137,655      118,663       140,436       118,745
                                                      ========     ========     =========     =========
  Diluted..........................................    141,786      120,297       144,770       120,321
                                                      ========     ========     =========     =========
Dividends declared per share.......................  $     .12    $     .10    $      .22    $      .20
                                                      ========     ========     =========     =========




         The financial information included herein has been prepared by
     management without audit by independent registered public accountants.

                 The accompanying notes are an integral part of
                    these consolidated financial statements.

                                        6





                        PIONEER NATURAL RESOURCES COMPANY

                 CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY
                                 (in thousands)
                                   (Unaudited)




                                                                                               Accumulated Other
                                                                                           Comprehensive Income (Loss)
                                                                                           ---------------------------
                                                                                                Net
                                                                                              Deferred
                                            Additional                                         Hedge      Cumulative      Total
                                    Common   Paid-in    Treasury    Deferred    Accumulated    Losses,    Translation  Stockholders'
                                    Stock    Capital      Stock   Compensation    Deficit    Net of Tax   Adjustment      Equity
                                    ------  ----------  --------  ------------  -----------  -----------  -----------  ------------
                                                                                               

Balance as of January 1, 2005.....  $1,456  $3,705,286  $ (27,793)  $(22,558)    $(634,146)  $  (241,350)   $50,885    $ 2,831,780

 Dividends declared ($.22 per
   common share)..................      -           -          -          -        (31,176)           -          -         (31,176)
 Exercise of long-term incentive
   plan stock options and
   employee stock purchases.......       1       1,310     91,304         -        (52,445)           -          -          40,170
 Purchase of treasury stock.......      -           -    (698,804)        -             -             -          -        (698,804)
 Tax benefits related to
   stock-based compensation.......      -       18,148         -          -             -             -          -          18,148
 Deferred compensation:
   Compensation deferred..........      14      56,016         -     (56,030)           -             -          -              -
   Deferred compensation included
     in net income................      -           -          -      19,619            -             -          -          19,619
   Forfeitures of deferred
     compensation.................      (1)     (5,375)        -       5,708            -             -          -             332
 Net income.......................      -           -          -          -        393,789            -          -         393,789
 Other comprehensive income (loss):
   Net deferred hedge losses,
    net of tax:
     Net deferred hedge losses....      -           -          -          -             -     (1,017,308)       -       (1,017,308)
     Net hedge losses included
       in net income..............      -           -          -          -             -        253,508        -          253,508
     Tax benefits related to net
       hedge losses...............      -           -          -          -             -        306,490        -          306,490
   Translation adjustment.........      -           -          -          -             -             -       7,702          7,702
                                     -----   ---------   --------    -------      --------    ----------     ------     ----------
Balance as of September 30, 2005..  $1,470  $3,775,385  $(635,293)  $(53,261)    $(323,978)  $  (698,660)   $58,587    $ 2,124,250
                                     =====   =========   ========    =======      ========    ==========     ======     ==========




         The financial information included herein has been prepared by
     management without audit by independent registered public accountants.

              The accompanying notes are an integral part of these
                       consolidated financial statements.

                                        7





                        PIONEER NATURAL RESOURCES COMPANY

                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)
                                   (Unaudited)




                                                        Three months ended         Nine months ended
                                                           September 30,             September 30,
                                                     ----------------------    --------------------------
                                                        2005         2004          2005           2004
                                                     ---------    ---------    -----------    -----------
                                                                                  

Cash flows from operating activities:
  Net income......................................   $ 123,573    $  80,916    $   393,789    $   210,806
  Adjustments to reconcile net income to net
    cash provided by operating activities:
     Depletion, depreciation and amortization.....     136,367      135,459        431,760        405,758
     Impairment of long-lived assets..............          21       34,825            644         34,825
     Exploration expenses, including dry holes....      52,817       13,975        157,604        125,415
     Deferred income taxes........................      30,485       15,377        157,283         94,500
     Loss (gain) on disposition of assets, net....        (394)        (215)        (2,763)            30
     Loss on extinguishment of debt...............      18,633          -           25,975            -
     Accretion of discount on asset retirement
       obligations................................       1,968        2,030          6,210          6,012
     Discontinued operations......................     (15,256)       5,249        (84,118)        15,778
     Interest expense.............................       1,898       (1,094)         4,270        (12,457)
     Commodity hedge related activity.............       1,658      (11,311)        (9,069)       (33,844)
     Amortization of stock-based compensation.....       6,449        2,928         19,619          7,794
     Amortization of deferred revenue.............     (21,882)         -          (53,956)           -
     Other noncash items..........................       3,950          788         10,777          6,492
  Changes in operating assets and liabilities,
   net of effects from acquisition:
     Accounts receivable, net.....................       9,044       13,450        (45,255)       (45,090)
     Inventories..................................      (8,964)      (5,572)       (21,667)        (9,752)
     Prepaid expenses.............................     (13,513)      (6,881)        (7,705)        (2,034)
     Other current assets, net....................         405          380           (124)         1,137
     Accounts payable.............................      27,730      (23,019)        37,294        (27,773)
     Interest payable.............................     (21,593)     (14,526)       (25,957)       (14,440)
     Income taxes payable.........................      (6,314)      (1,460)         5,605          2,995
     Other current liabilities....................      (9,350)      (2,160)       (15,039)        (8,679)
                                                      --------     --------     ----------     ----------
       Net cash provided by operating activities..     317,732      239,139        985,177        757,473
                                                      --------     --------     ----------     ----------
Cash flows from investing activities:
  Payments for acquisition, net of cash acquired..         -       (849,450)          (965)      (849,450)
  Proceeds from disposition of assets.............      63,598          510      1,184,196          1,050
  Additions to oil and gas properties.............    (414,170)    (116,922)      (908,727)      (467,753)
  Other property additions, net...................     (14,337)      (9,894)       (34,059)       (24,137)
                                                      --------     --------     ----------     ----------
       Net cash provided by (used in) investing
         activities...............................    (364,909)    (975,756)       240,445     (1,340,290)
                                                      --------     --------     ----------     ----------
Cash flows from financing activities:
  Borrowings under long-term debt.................     599,700      876,000        976,112      1,032,477
  Principal payments on long-term debt............     (66,967)    (109,002)    (1,440,649)      (401,479)
  Payment of other liabilities....................     (18,462)     (28,059)       (32,437)       (36,178)
  Exercise of long-term incentive plan stock
     options and employee stock purchases.........      12,736        6,273         40,170         20,281
  Purchase of treasury stock......................    (472,580)     (20,963)      (698,804)       (36,249)
  Payment of financing fees.......................      (1,811)        (510)        (1,811)          (642)
  Dividends paid..................................         -            -          (14,332)       (12,005)
                                                      --------     --------     ----------     ----------
       Net cash provided by (used in) financing
           activities.............................      52,616      723,739     (1,171,751)       566,205
                                                      --------     --------     ----------     ----------
Net increase (decrease) in cash and cash
  equivalents.....................................       5,439      (12,878)        53,871        (16,612)
Effect of exchange rate changes on cash and
  cash equivalents................................         618          615          3,380            262
Cash and cash equivalents, beginning of period....      58,451       15,212          7,257         19,299
                                                      --------     --------     ----------     ----------
Cash and cash equivalents, end of period..........   $  64,508    $   2,949    $    64,508    $     2,949
                                                      ========     ========     ==========     ==========



         The financial information included herein has been prepared by
     management without audit by independent registered public accountants.

              The accompanying notes are an integral part of these
                       consolidated financial statements.

                                        8





                        PIONEER NATURAL RESOURCES COMPANY

                  CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
                                 (in thousands)
                                   (Unaudited)







                                                      Three months ended         Nine months ended
                                                         September 30,              September 30,
                                                    ----------------------    -----------------------
                                                       2005         2004         2005         2004
                                                    ---------    ---------    ----------    ---------

                                                                                
Net income.......................................   $ 123,573    $  80,916    $  393,789    $ 210,806
                                                     --------     --------     ---------     --------
Other comprehensive income (loss):
  Net deferred hedge losses, net of tax:
     Net deferred hedge losses...................    (476,023)    (267,926)   (1,017,308)    (505,522)
     Net hedge losses included in net income.....     122,484       55,850       253,508      142,735
     Tax benefits related to net hedge losses....     145,116       77,873       306,490      134,452
  Translation adjustment.........................      12,561       12,005         7,702        6,185
                                                     --------     --------     ---------     --------
       Other comprehensive loss..................    (195,862)    (122,198)     (449,608)    (222,150)
                                                     --------     --------     ---------     --------
Comprehensive loss...............................   $ (72,289)   $ (41,282)   $  (55,819)   $ (11,344)
                                                     ========     ========     =========     ========






         The financial information included herein has been prepared by
     management without audit by independent registered public accountants.

              The accompanying notes are an integral part of these
                       consolidated financial statements.

                                        9






                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)

NOTE A.     Organization and Nature of Operations

     Pioneer is a Delaware  corporation  whose common stock is listed and traded
on the New York Stock Exchange.  The Company is a large  independent oil and gas
exploration  and  production  company  with  operations  in the  United  States,
Argentina, Canada, Equatorial Guinea, Nigeria, South Africa and Tunisia.

NOTE B.     Basis of Presentation

     Presentation.  In the opinion of  management,  the  unaudited  consolidated
financial  statements  of the Company as of September 30, 2005 and for the three
and nine months ended  September 30, 2005 and 2004 include all  adjustments  and
accruals,  consisting only of normal recurring  accrual  adjustments,  which are
necessary for a fair presentation of the results for the interim periods.  These
interim  results  are not  necessarily  indicative  of results  for a full year.
Certain amounts in the prior period financial  statements have been reclassified
to conform to the current period presentation.

     On  September  28,  2004,  the Company  completed  a merger with  Evergreen
Resources,  Inc.  ("Evergreen")  that added to the  Company's  United States and
Canadian asset bases and expanded its portfolio of development  and  exploration
opportunities in North America. Evergreen's operations were primarily focused on
developing and expanding its coal bed methane production from the Raton Basin in
southern Colorado.

     In  accordance  with the  provisions  of Statement of Financial  Accounting
Standards  ("SFAS") No. 141, "Business  Combinations",  the merger was accounted
for as a purchase of Evergreen by Pioneer. As a result, the historical financial
statements for the Company are those of Pioneer prior to September 28, 2004. See
Note C for additional information regarding the Evergreen merger.

     Certain information and footnote disclosures normally included in financial
statements prepared in accordance with generally accepted accounting  principles
in the United States  ("GAAP") have been  condensed or omitted in this Form 10-Q
pursuant to the rules and regulations of the SEC. These  consolidated  financial
statements  should  be  read  in  connection  with  the  consolidated  financial
statements  and notes thereto  included in the  Company's  Annual Report on Form
10-K for the year ended December 31, 2004.

     Discontinued operations.  During May 2005, the Company sold its interest in
Martin Creek,  Conroy Black and Lookout Butte oil and gas  properties in Canada.
During  August  2005,  the  Company  sold its  interests  in certain oil and gas
properties on the shelf of the Gulf of Mexico.  In accordance with SFAS No. 144,
"Accounting  for the Impairment or Disposal of Long-Lived  Assets",  the Company
has  reflected  the  results  of  operations  of  the  disposed   properties  as
discontinued  operations,  rather than as a component of continuing  operations.
See Note O for additional information regarding discontinued operations.

     Inventories.  Inventories were comprised of $62.9 million and $37.9 million
of materials and supplies and $2.2 million and $2.4 million of commodities as of
September 30, 2005 and December 31, 2004, respectively.  The Company's materials
and supplies inventory is primarily  comprised of oil and gas drilling or repair
items  such as  tubing,  casing,  chemicals,  operating  supplies  and  ordinary
maintenance  materials  and parts.  The  materials  and  supplies  inventory  is
primarily  acquired for use in future drilling  operations or repair  operations
and is carried at the lower of cost or market,  on a first-in,  first-out basis.
Commodities  inventory is carried at the lower of average  cost or market,  on a
first-in,  first- out basis. As of September 30, 2005 and December 31, 2004, the
Company's  materials  and  supplies  inventory  was net of $.2  million  and $.4
million, respectively, of valuation reserve allowances.

     Goodwill.  As described in Note C, the Company  recorded  $322.8 million of
goodwill  associated with the Evergreen merger. The goodwill was recorded to the
Company's United States reporting unit.  In accordance with Emerging Issues Task

                                       10




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


Force  Abstract  Issue No. 00-23,  "Issues  Related to the  Accounting for Stock
Compensation under APB Opinion No. 25 and Financial  Accounting  Standards Board
("FASB")  Interpretation  No. 44",  the  Company  has reduced  goodwill by $16.2
million since September 28, 2004, including $1.1 million and $7.2 million during
the three and nine  months  ended  September  30,  2005,  respectively,  for tax
benefits  associated with the exercise of fully-vested  stock options assumed in
conjunction  with the  Evergreen  merger.  In  accordance  with  SFAS  No.  142,
"Goodwill and Other Intangible  Assets",  goodwill is not amortized to earnings,
but is assessed for impairment  whenever events or  circumstances  indicate that
impairment of the carrying  value of goodwill is likely,  but no less often than
annually.  If the carrying value of goodwill is determined to be impaired, it is
reduced for the impaired value with a corresponding charge to pretax earnings in
the period in which it is determined to be impaired. During the third quarter of
2005, the Company  performed its annual assessment of impairment of goodwill and
determined that there was no impairment.

     Stock-based  compensation.  The Company has a long-term incentive plan (the
"Long-Term   Incentive  Plan")  under  which  the  Company  grants   stock-based
compensation.  The Company accounts for stock-based  compensation  granted under
the  Long-Term  Incentive  Plan using the intrinsic  value method  prescribed by
Accounting Principles Board Opinion ("APB") No. 25, "Accounting for Stock Issued
to Employees" ("APB 25") and related interpretations.  The Company did not grant
any stock  options  under the  Long-Term  Incentive  Plan during the nine months
ended  September 30, 2005.  Stock-based  compensation  expense  associated  with
option  grants was not  recognized  in the  determination  of the  Company's net
income  during the three and nine months ended  September  30, 2005 and 2004, as
all options granted under the Long-Term Incentive Plan had exercise prices equal
to the  market  value of the  underlying  common  stock on the  dates of  grant.
Stock-based  compensation  expense  associated with  restricted  stock awards is
deferred  and  amortized  to earnings  ratably  over the vesting  periods of the
awards.

     The following table  illustrates the pro forma effect on net income and net
income  per share as if the  Company  had  applied  the fair  value  recognition
provisions of SFAS No. 123,  "Accounting  for Stock-Based  Compensation"  ("SFAS
123") to  stock-based  compensation  during  the  three  and nine  months  ended
September 30, 2005 and 2004:


                                                         Three months ended        Nine months ended
                                                            September 30,            September 30,
                                                       ---------------------    ---------------------
                                                          2005        2004         2005         2004
                                                       ---------   ---------    ---------   ---------
                                                             (in thousands, except per share amounts)
                                                                                
     Net income, as reported........................   $ 123,573   $  80,916    $ 393,789   $ 210,806
     Plus: Stock-based compensation expense
       included in net income for all awards,
       net of tax (a)...............................       4,095       1,859       12,458       4,949
     Deduct: Stock-based compensation expense
       determined under fair value based method
       for all awards, net of tax (a)...............      (4,586)     (3,273)     (14,669)     (9,809)
                                                        --------    --------     --------    --------
     Pro forma net income...........................   $ 123,082   $  79,502    $ 391,578   $ 205,946
                                                        ========    ========     ========    ========
     Net income per share:
       Basic - as reported..........................   $     .90   $     .68    $    2.80   $    1.78
                                                        ========    ========     ========    ========
       Basic - pro forma............................   $     .89   $     .67    $    2.79   $    1.73
                                                        ========    ========     ========    ========
       Diluted - as reported........................   $     .88   $     .67    $    2.74   $    1.75
                                                        ========    ========     ========    ========
       Diluted - pro forma..........................   $     .87   $     .66    $    2.72   $    1.71
                                                        ========    ========     ========    ========
<FN>
- -----------
(a)  For the  three  and nine  months  ended  September  30,  2005,  stock-based
     compensation  expense included in net income is net of tax benefits of $2.4
     million and $7.2  million,  respectively,  as compared to $1.1  million and
     $2.8  million  for  the  same  respective   periods  in  2004.   Similarly,
     stock-based  compensation  expense  determined  under the fair value  based
     method for the three and nine months ended September 30, 2005 is net of tax
</FN>


                                       11




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     benefits of $2.6  million and $8.4  million,  respectively,  as compared to
     $1.9 million and $5.6 million for the same respective  periods in 2004. See
     Note E for additional information regarding the Company's income taxes.

     New   accounting   pronouncements.   The  following   discussions   provide
information  about new  accounting  pronouncements  that have been issued by the
FASB:

     SFAS 123(R). In December 2004, the FASB issued SFAS No. 123 (revised 2004),
"Share-Based  Payment"  ("SFAS  123(R)"),  which is a revision of SFAS 123. SFAS
123(R) also supersedes APB 25 and amends SFAS No. 95, "Statement of Cash Flows".
Generally,  the approach to  accounting  for  stock-based  compensation  in SFAS
123(R) is similar to the approach  described in SFAS 123.  However,  SFAS 123(R)
will require all share-based payments to employees, including grants of employee
stock  options,  to be recognized  as  stock-based  compensation  expense in the
Company's Consolidated  Statements of Operations based on their fair values. Pro
forma disclosure is no longer an alternative.

     SFAS  123(R)  must be  adopted no later  than  January 1, 2006 and  permits
public companies to adopt its requirements using one of two methods:

o    A "modified prospective" method in which compensation expense is recognized
     beginning with the effective date based on the  requirements of SFAS 123(R)
     for all share-based  payments  granted after the adoption date and based on
     the  requirements  of SFAS 123 for all awards granted to employees prior to
     the  effective  date of SFAS 123(R) that  remain  unvested on the  adoption
     date.
o    A "modified  retrospective"  method which includes the  requirements of the
     modified  prospective method described above, but also permits companies to
     restate either all prior periods  presented or prior interim periods of the
     year of adoption based on the amounts previously  recognized under SFAS 123
     for purposes of pro forma disclosures.

     The Company has elected to adopt the  provisions  of SFAS 123(R) on January
1, 2006 using the modified prospective method.

     As permitted by SFAS 123, the Company  currently  accounts for  share-based
payments to employees using the intrinsic value method  prescribed by APB 25 and
related  interpretations.  As such,  the Company  generally  does not  recognize
compensation  expense  associated with employee stock option grants. The Company
has not issued stock options to employees since 2003. Consequently, the adoption
of SFAS  123(R)'s  fair value method will not have a  significant  impact on the
Company's  future results of operations or financial  position.  Had the Company
adopted SFAS 123(R) in prior  periods,  the impact would have  approximated  the
impact of SFAS 123 as described in the pro forma disclosures above. The adoption
of SFAS 123(R) will have no effect on future  results of  operations  related to
the  Company's  unvested  outstanding   restricted  stock  awards.  The  Company
estimates  that the  adoption of SFAS  123(R),  based on  estimated  outstanding
unvested stock options,  will result in  compensation  charges of  approximately
$1.1 million during 2006.

     The Company has an Employee  Stock  Purchase  Plan (the "ESPP") that allows
eligible  employees  to  annually  purchase  the  Company's  common  stock  at a
discount. The provisions of SFAS 123(R) will cause the ESPP to be a compensatory
plan.  However,  the change in accounting for the ESPP is not expected to have a
material  impact  on  the  Company's  financial  position,   future  results  of
operations or liquidity.  Historically,  the ESPP compensatory amounts have been
nominal.



                                       12




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     SFAS  123(R)  also  requires  the tax  benefits  in  excess  of  recognized
compensation  expenses to be reported as a financing cash flow rather than as an
operating cash flow as required under current  literature.  This requirement may
serve to reduce the Company's  future cash flows from  operating  activities and
increase  future  cash  flows  from  financing  activities,  to  the  extent  of
associated tax benefits that may be realized in the future.

     FIN 47.  In March  2005,  the  FASB  issued  FASB  Interpretation  No.  47,
"Accounting for Conditional Asset Retirement  Obligations,  an interpretation of
FASB  Statement No. 143" ("FIN 47").  FIN 47 clarifies  that  conditional  asset
retirement  obligations  meet  the  definition  of  liabilities  and  should  be
recognized when incurred if their fair values can be reasonably  estimated.  The
interpretation  is effective no later than  December  31, 2005.  The  cumulative
effect of initially  applying FIN 47, if any, would be recognized as a change in
accounting principle; however, the Company does not believe that the adoption of
FIN 47 will impact its consolidated financial statements.

     FSP FAS 19-1. In April 2005,  the FASB issued Staff  Position No. FAS 19-1,
"Accounting for Suspended Well Costs" ("FSP FAS 19-1"). FSP FAS 19-1 amends SFAS
No. 19, "Financial  Accounting and Reporting by Oil and Gas Producing Companies"
("SFAS 19"), to allow continued  capitalization of exploratory well costs beyond
one year from the completion of drilling under  circumstances where the well has
found a sufficient quantity of reserves to justify its completion as a producing
well and the enterprise is making sufficient progress assessing the reserves and
the economic and  operating  viability of the project.  FSP FAS 19-1 also amends
SFAS 19 to require enhanced  disclosures of suspended  exploratory well costs in
the notes to the consolidated financial statements.  The Company adopted the new
requirements  during  the  second  quarter  of 2005.  See Note D for  additional
information  regarding the Company's exploratory well costs. The adoption of FSP
FAS 19-1 did not impact the Company's consolidated financial position or results
of operations.

NOTE C.     Evergreen Merger

     On September 28, 2004,  Pioneer  completed its merger with Evergreen,  with
Pioneer being the surviving corporation for accounting purposes. The transaction
was  accounted  for as a purchase  of  Evergreen  by  Pioneer.  The merger  with
Evergreen  was  accomplished  through  the  issuance of 25.4  million  shares of
Pioneer  common  stock  and  $851.1  million  of  cash  paid  to  the  Evergreen
shareholders  at  closing,  net of $12.1  million  of  acquired  cash.  The cash
consideration  paid in the  merger was  financed  through  borrowings  on a $900
million 364-day senior unsecured  revolving credit facility (the "364-Day Credit
Agreement").  See Note F for  additional  information  about the 364-Day  Credit
Agreement.

     The  Company  recorded  $322.8  million  of  goodwill  associated  with the
Evergreen  merger,  which  represented the excess of the purchase  consideration
over the net fair value of the identifiable net assets acquired.

     The following unaudited pro forma combined condensed financial data for the
three and nine months ended  September 30, 2004 was derived from the  historical
financial  statements  of Pioneer and  Evergreen  giving effect to the Evergreen
merger as if it had  occurred  on  January  1,  2004.  The  unaudited  pro forma
combined  condensed  financial data have been included for comparative  purposes
only, are not necessarily indicative of the results that might have occurred had
the  merger  taken  place  on  January  1,  2004  and are not  intended  to be a
projection of future results.


                                       13




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)



                                                          Three months           Nine months
                                                             ended                  ended
                                                       September 30, 2004     September 30, 2004
                                                       ------------------     ------------------
                                                        (in thousands, except per share amounts)
                                                                            
   Revenues...........................................     $  492,557             $1,462,922
                                                            =========              =========
   Income from continuing operations..................     $   76,148             $  217,194
   Income from discontinued operations, net of tax....          3,842                  9,391
                                                             --------              ---------
   Net income.........................................     $   79,990             $  226,585
                                                            =========              =========
   Basic earnings per share:
     Income from continuing operations................     $      .53             $     1.51
     Income from discontinued operations, net of tax..            .03                    .06
                                                             --------              ---------
     Net income.......................................     $      .56             $     1.57
                                                            =========              =========
   Diluted earnings per share:
     Income from continuing operations................     $      .51             $     1.47
     Income from discontinued operations, net of tax..            .03                    .06
                                                             --------              ---------
     Net income.......................................     $      .54             $     1.53
                                                            =========              =========


NOTE D.     Exploratory Well Costs

     The Company  capitalizes  exploratory  well costs until a determination  is
made that the well has either found proved  reserves or that it is impaired.  If
the exploratory well is determined to be impaired, the well costs are charged to
expense.

     The following  table reflects the Company's  capitalized  exploratory  well
activity during the three and nine months ended September 30, 2005 and the years
ended December 31, 2004 and 2003:


                                                                                                      Year ended
                                                      Three months           Nine months             December 31,
                                                          ended                 ended           ---------------------
                                                    September 30, 2005    September 30, 2005      2004         2003
                                                    ------------------    ------------------    --------    ---------
                                                                                (in thousands)
                                                                                                
   Beginning capitalized exploratory well costs....     $ 134,587             $ 126,472         $108,986    $  71,500
   Additions to exploratory well costs pending the
     determination of proved reserves..............        50,478               148,502          156,937      216,352
   Reclassifications due to determination of
     proved reserves...............................        (9,362)              (54,261)         (56,639)    (117,966)
   Exploratory well costs charged to expense.......       (10,452)              (55,462)         (82,812)     (60,900)
                                                         --------              --------          -------     --------
   Ending capitalized exploratory well costs ......     $ 165,251             $ 165,251         $126,472    $ 108,986
                                                         ========              ========          =======     ========




                                       14




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     The following table provides an aging as of September 30, 2005 and December
31, 2004 and 2003 of  capitalized  exploratory  well costs based on the date the
drilling was completed and the number of wells for which  exploratory well costs
have been  capitalized  for a period  greater  than one year  since the date the
drilling was completed:



                                                                                      December 31,
                                                                 September 30,   ---------------------
                                                                     2005          2004         2003
                                                                 ------------    ---------    --------
                                                                   (in thousands, except well counts)
                                                                                     
  Capitalized exploratory well costs that have been
     capitalized for a period of one year or less..............    $ 74,084       $ 35,046    $ 75,120
  Capitalized exploratory well costs that have been
     capitalized for a period greater than one year............      91,167         91,426      33,866
                                                                    -------        -------     -------
                                                                   $165,251       $126,472    $108,986
                                                                    =======        =======     =======
  Number of wells with exploratory well costs that
     have been capitalized for a period greater than one year..           7             10           3
                                                                    =======        =======     =======


     The following table provides the capitalized costs of exploration  projects
that have been  suspended  for more than one year as of  September  30, 2005 and
December 31, 2004 and 2003:



                                                                                      December 31,
                                                                 September 30,   ---------------------
                                                                     2005          2004         2003
                                                                 ------------    ---------    --------
                                                                              (in thousands)
                                                                                     
     United States:
       Ozona Deep..............................................    $ 19,423       $ 19,462    $ 19,003
       Oooguruk................................................      50,507         47,083         -

     Canada - Other............................................         -            1,214         -
     South Africa - Gas Project................................      15,520         14,895      14,863
     Tunisia - Anaguid.........................................       5,717          8,772         -
                                                                    -------        -------     -------
         Total.................................................    $ 91,167       $ 91,426    $ 33,866
                                                                    =======        =======     =======


     The  following   discussion  describes  the  history  and  status  of  each
significant suspended exploratory project:

     Ozona Deep. The Company's  Ozona Deep  exploration  well was drilled during
2002 and found quantities of oil believed to be commercial;  however,  given its
location  in the Gulf of Mexico,  it is  necessary  to have a signed  production
handling  agreement  ("PHA")  with  infrastructure  in the  area to  ensure  the
economics  associated  with  the  discovery  prior to  doing  further  appraisal
drilling.  During the third  quarter of 2005,  Pioneer and the operator of Ozona
Deep signed a Capacity Commitment  Agreement ("CCA") with a third party platform
to bring future production from the discovery to the third party's platform. The
Company  anticipates  entering  into a PHA  based  on the  CCA and  drilling  an
appraisal well during 2006.

     Oooguruk. During 2003, the Company's Alaskan Oooguruk discovery wells found
quantities of oil believed to be commercial.  In 2003, the Company began farm-in
discussions with the owner of undeveloped  discoveries in adjacent acreage given
its  proximity and the potential  cost benefits of a larger scale  project.  The
farm-in was completed during 2004. Along with completing the farm-in  agreement,
Pioneer  obtained  access to  exploration  well and seismic  data to improve the
Company's  understanding  of the potential of the discoveries  without having to
drill  additional  wells.  In late 2004,  the  Company  completed  an  extensive
technical and economic evaluation of the resource potential within this area and
authorized a front-end  engineering  design  study  ("FEED  study") for the area
which is  expected  to be  completed by  the end  of 2005. If the FEED study and

                                       15




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


commercial  arrangements confirm favorable  development  economics,  the Company
plans to  begin  development  operations  during  2006,  subject  to  regulatory
approvals, with first oil sales targeted in 2008. Simultaneously, the Company is
working to secure throughput  agreements to process the associated potential oil
production at a nearby facility should the project be sanctioned.

     South Africa - Gas  Project.  During  2001,  the Company  drilled two South
African discovery wells that found quantities of gas and condensate  believed to
be commercial. During 2004, 2003 and 2002, the Company actively reviewed the gas
supply and  demand  fundamentals  in South  Africa  and had  discussions  with a
gas-to-liquids  ("GTL") plant  located at Mossel Bay to purchase the  condensate
and gas.  During 2004, a FEED study was authorized for the gas  development  and
infrastructure  design. The FEED study was completed in early 2005, and based on
that study, the GTL plant operator  initiated purchase orders for long-lead time
infrastructure components.

     During the third  quarter of 2005,  the Company  and the GTL plant operator
announced  that they had reached an agreement to develop the gas and  condensate
fields  discovered  offshore South Africa.  The companies signed a Memorandum of
Understanding  finalizing  the terms for  jointly  developing  the gas fields to
provide feedstock for the GTL plant. The agreement is subject to approval by the
GTL plant operator's board of directors.

     Tunisia - Anaguid.  During 2003, the Company drilled two exploration  wells
on its Anaguid  Block in Tunisia which found  quantities  of gas and  condensate
believed to be  commercial.  During 2004,  the wells were scheduled and approved
for  extended  production  tests.  However,  the  project  operator  delayed the
extended production tests due to issues unrelated to the Company or the project.
In the third  quarter of 2005,  the project  operator,  along with the  Company,
conducted an extended  production  test of one of the two  existing  exploration
wells and drilled an offset appraisal well to the other exploration well.

     The  results  of the  extended  production  test were  unfavorable  and the
Company has expensed the costs associated with this well in the third quarter of
2005,  which were  approximately  $5.1  million.  However,  the  appraisal  well
offsetting  the second  discovery  encountered  gas and  condensate in a similar
horizon to the initial well. The Company,  along with the operator, is currently
reviewing data from the appraisal well to determine  whether  development of the
area is economical.

NOTE E.     Income Taxes

     The Company  accounts for income taxes in accordance with the provisions of
SFAS No. 109, "Accounting for Income Taxes" ("SFAS 109"). SFAS 109 requires that
the Company  continually assess both positive and negative evidence to determine
whether it is more  likely  than not that  deferred  tax assets can be  realized
prior  to  their  expiration.  Pioneer  monitors  Company-specific,  oil and gas
industry and worldwide  economic  factors and assesses the  likelihood  that the
Company's net operating loss  carryforwards and other deferred tax attributes in
the United States,  state,  local and foreign tax jurisdictions will be utilized
prior to their  expiration.  As of September 30, 2005,  the Company's  valuation
allowance was $91.3 million, primarily related to foreign tax jurisdictions.

     In October  2004,  the American  Jobs Creation Act ("AJCA") was signed into
law. The AJCA includes a dividend  deduction of 85 percent of qualified  foreign
earnings that are  repatriated,  as defined in the AJCA.  During June 2005,  the
Company  determined that it was advantageous to apply the provisions of the AJCA
to qualified foreign earnings that could be repatriated.  The Company formalized
a repatriation plan in June 2005 and repatriated $313 million from Canada, South
Africa and Tunisia.  Based on the current understanding of the provisions of the
AJCA and  projections of future  foreign  earnings,  the Company  estimates that
approximately  $164.3  million of the  repatriated  funds will  qualify  for the
dividend  exclusion.  The Company is obligated by the  provisions of the AJCA to
invest the qualifying  dividends in the United States within a reasonable period
of time.  The  Company  estimated  the cash tax  liability  associated  with the
qualifying  dividends to be approximately $9.0 million for 2005. During the nine
months ended  September 30, 2005, the Company  recognized  income tax expense of
$4.7  million  related to  continuing  operations  and $2.9  million  related to
discontinued  operations  associated  with  qualifying  dividends.  If funds are


                                       16




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


available,  the Company may repatriate  additional earnings during 2005. Further
repatriation  under  the AJCA will be  dependent  upon the  Company's  financial
results and activities for the remainder of 2005.

     The Company's  income tax provision  attributable to income from continuing
operations  consisted  of the  following  for the  three and nine  months  ended
September 30, 2005 and 2004:



                                             Three months ended         Nine months ended
                                                September 30,             September 30,
                                           ----------------------    ----------------------
                                              2005         2004         2005         2004
                                           ---------    ---------    ---------    ---------
                                                           (in thousands)
                                                                      
      Current:
         U.S. federal...................   $   3,308    $     -      $   7,965    $   2,500
         U.S. state and local...........        (474)         300         (343)         601
         Foreign........................       9,164        7,216       28,817       16,087
                                            --------     --------     --------     --------
                                              11,998        7,516       36,439       19,188
                                            --------     --------     --------     --------
      Deferred:
         U.S. federal...................      25,828       14,692      147,147       94,058
         U.S. state and local...........         782          599        5,369        3,662
         Foreign........................       3,875           86        4,767       (3,220)
                                            --------     --------     --------     --------
                                              30,485       15,377      157,283       94,500
                                            --------     --------     --------     --------
                                           $  42,483    $  22,893    $ 193,722    $ 113,688
                                            ========     ========     ========     ========


     Included in the  Company's  income tax  provision for the nine months ended
September  30,  2005 is the  reversal of a $26.9  million  tax benefit  recorded
principally in the third quarter of 2004 as a result of the  cancellation of the
development  of the Olowi block and the  Company's  decision to exit Gabon.  The
Company  reversed  the tax benefit as a result of signing an  agreement  in June
2005 to sell its shares in the  subsidiary  that owns the  interest in the Olowi
block to an  unaffiliated  buyer,  which made it more  likely  than not that the
Company would not realize the originally  recorded tax benefit.  The sale of the
shares in the subsidiary that owns the interest in the Olowi block was completed
during  October  2005 and the  Company  will  recognize a gain during the fourth
quarter of  approximately  $47 million with no  associated  income tax effect in
either  Gabon  or  the  United  States.  See  Note P for  additional  discussion
regarding the close of the Gabon sale. In  accordance  with FASB  Interpretation
No.  18,  "Accounting  for Income  Taxes in Interim  Periods"  ("FIN  18"),  the
Company's  income tax  provision  for the nine months ended  September  30, 2005
includes a portion of the beneficial  effect that this tax-free income will have
on the Company's year-end effective tax rate.

NOTE F.     Long-term Debt

     Lines of credit. During September 2005, the Company entered into an Amended
and Restated 5-Year Revolving Credit Agreement (the "Amended Credit  Agreement")
that amended the Company's $700 million 5-Year Revolving Credit  Agreement.  The
Amended Credit Agreement matures in September 2010 unless extended in accordance
with the terms of the Amended Credit Agreement.  The terms of the Amended Credit
Agreement provide for initial aggregate loan commitments of $1.5 billion,  which
may be  increased to a maximum  aggregate  amount of $1.8 billion if the lenders
increase  their  loan  commitments  or if  loan  commitments  of  new  financial
institutions are added to the Amended Credit  Agreement.  In connection with the
funding of the Amended  Credit  Agreement  on September  30,  2005,  all amounts
outstanding  under the 364-Day  Credit  Agreement  were  retired and the 364-Day
Credit Agreement was terminated.

     Borrowings  under  the  Amended  Credit  Agreement  may be in the  form  of
revolving loans or swing line loans.  Aggregate outstanding swing line loans may
not exceed $100 million.  Revolving  loans bear  interest,  at the option of the
Company,  based on (a) a rate per annum  equal to the  higher of the prime  rate
announced  from time to time by JPMorgan  Chase Bank or the weighted  average of
the rates on overnight  Federal funds  transactions  with members of the Federal
Reserve System during the last  preceding  business day plus .5 percent or (b) a
base  Eurodollar  rate,  substantially  equal  to  LIBOR,  plus  a  margin  (the
"Applicable  Margin")  that is  determined  by  reference to a grid based on the


                                       17




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


Company's  debt  rating  (currently  .625  percent).  The  Applicable  Margin is
increased by .10 percent to .125 percent per annum,  depending on the  Company's
debt rating if total  borrowings  under the Amended Credit  Agreement  exceed 50
percent of the aggregate loan  commitments.  Swing line loans bear interest at a
rate per annum equal to the "ASK" rate for Federal funds periodically  published
by the Dow Jones Market  Service plus the  Applicable  Margin.  The Company pays
commitment fees on the undrawn  amounts under the Amended Credit  Agreement that
are determined by reference to a grid based on the Company's debt rating,  which
commitment fees were .125 percent per annum at September 30, 2005.

     As of September 30, 2005, the Company had $755.0 million borrowed under the
Amended Credit Agreement,  bearing interest at an effective rate of 4.75 percent
per annum. Including $35.3 million of undrawn letters of credit, the Company had
$709.7 million of unused  borrowing  capacity under the Amended Credit Agreement
on September 30, 2005.

     The Amended Credit Agreement  contains certain financial  covenants,  which
include the maintenance of a ratio of the Company's earnings before gain or loss
on the  disposition of assets,  interest  expense,  income taxes,  depreciation,
depletion and amortization  expense,  exploration and  abandonments  expense and
other noncash charges and expenses to consolidated  interest expense of at least
3.5 to 1.0;  maintenance  of a ratio of total debt to book  capitalization  less
intangible assets,  accumulated other  comprehensive  income and certain noncash
asset impairments not to exceed .60 to 1.0; and if the Company should fall below
an investment grade rating by both Moody's Investors Service,  Inc.  ("Moody's")
and  Standard  &  Poor's  Ratings  Group,  Inc.  ("S&P")  prior to  attaining  a
mid-investment  grade  rating (as defined in the Amended  Credit  Agreement)  by
either of such  rating  agencies,  then such  covenants  would also  include the
maintenance of an annual ratio of the net present value of the Company's oil and
gas  properties  to total  debt of at least  1.50 to 1.0 for the first 18 months
following the date of the Amended Credit Agreement,  and 1.75 to 1.0 thereafter.
As of September  30, 2005,  the Company was in  compliance  with all of its debt
covenants.

     Senior  notes.  During the three and nine months ended  September 30, 2005,
the Company redeemed $19.0 million and $51.4 million, respectively, of principal
amount of its outstanding 9-5/8% senior notes due 2010 (the "9-5/8% Notes"). The
Company  recognized  a  pretax  charge  in  other  expense  in the  accompanying
Consolidated  Statements of Operations on the  redemption of the 9-5/8% Notes of
$4.4 million and $11.7 million for the three and nine months ended September 30,
2005, respectively.

     During  September 2005, the Company  accepted  tenders to purchase for cash
$188.4  million in  principal  amount of its 5.875%  Senior  Notes due 2012 (the
"5.875%  Notes"),  which  represented  97 percent of the  outstanding  principal
amount. In addition,  the Company received  sufficient consents from the holders
of the 5.875% Notes to  permanently  remove  substantially  all of the operating
restrictions  contained in the indenture governing the 5.875% Notes.  Associated
with the  tenders to purchase  the 5.875%  Notes,  the  Company  recorded a $6.9
million debt  extinguishment  charge during the third quarter of 2005,  which is
included  in  other  expense  in the  accompanying  Consolidated  Statements  of
Operations.

     During September 2005, the Company  announced its intention to redeem under
the "make-whole"  provision contained in the governing  indentures the remaining
$12.6 million and $16.2 million of aggregate principal amount outstanding of its
9-5/8%  Notes  and  its  7.50%  Senior  Notes  due  2012  (the  "7.50%  Notes"),
respectively.  During September 2005, the "make-whole"  premium was established.
Consequently,  the Company  accrued  the  "make-whole"  premium,  which was paid
during  October 2005,  and  recognized a pretax loss on the  redemptions of $7.4
million,  which is included in other  expense in the  accompanying  Consolidated
Statements of Operations for the three and nine months ended September 30, 2005.

NOTE G.     Derivative Financial Instruments

     Fair value  hedges.  The  Company  monitors  the debt  capital  markets and
interest  rate  trends to  identify  opportunities  to enter  into or  terminate
interest  rate  swap  contracts  with the  objective  of  reducing  its costs of
capital.  During the nine months ended  September 30, 2004, the Company  entered
into interest rate swap  contracts to hedge  a portion of  the fair value of its

                                       18




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


senior notes.  The terms of the interest rate swap  contracts  were for notional
amounts that matched the scheduled maturity of the hedged senior notes, required
the  counterparties to pay the Company a fixed annual interest rate equal to the
stated bond coupon rates on the notional amounts and required the Company to pay
the counterparties  variable annual interest rates on the notional amounts equal
to the periodic LIBOR plus a weighted  average  annual margin.  During the three
and nine months ended September 30, 2004,  settlements of open fair value hedges
reduced  the  Company's  interest  expense  by $.2  million  and  $2.2  million,
respectively.  As of September  30, 2005 and December 31, 2004,  the Company was
not a party to any open fair value hedges.

     As of September 30, 2005,  the carrying  value of the  Company's  long-term
debt in the  accompanying  Consolidated  Balance Sheets  included a $5.7 million
reduction in the carrying  value  attributable  to net deferred  hedge losses on
terminated  fair value hedges that are being amortized as increases or decreases
to interest  expense over the original terms of the terminated  agreements.  The
amortization  of deferred hedge gains on terminated  interest rate swaps reduced
the Company's  reported  interest expense by $.5 million and $3.8 million during
the three and nine months ended September 30, 2005, respectively, as compared to
$3.4 and $16.7 million during the same respective periods of 2004.

     The following  table sets forth,  as of September  30, 2005,  the scheduled
amortization of net deferred hedge gains and losses on terminated  interest rate
hedges  (including  terminated  fair  value and cash flow  hedges)  that will be
recognized  as  increases  in the case of losses,  and  decreases in the case of
gains, to the Company's future interest expense:


                                       Three months
                                          ending                    Year ending December 31,
                                       December 31,    ------------------------------------------------------
                                           2005          2006       2007       2008       2009     Thereafter
                                       ------------    -------    -------    -------    -------    ----------
                                                                          (in thousands)

                                                                                  
  Net deferred hedge gains (losses)...   $  306        $   175    $(1,809)   $  (980)   $(1,066)    $(5,573)
                                          ======        ======     ======     ======     ======      ======


     Cash flow hedges.  The Company utilizes commodity swap and collar contracts
to (i) reduce the effect of price  volatility  on the  commodities  the  Company
produces and sells,  (ii) support the  Company's  annual  capital  budgeting and
expenditure  plans and (iii) reduce commodity price risk associated with certain
capital  projects.  The Company also, from time to time,  utilizes interest rate
contracts  to reduce the effect of interest  rate  volatility  on the  Company's
indebtedness  and forward currency  exchange  agreements to reduce the effect of
U.S. dollar to Canadian dollar exchange rate volatility.



                                       19




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     Oil prices.  All material physical sales contracts  governing the Company's
United  States oil  production  have been tied  directly or  indirectly to NYMEX
prices.  As of  September  30,  2005,  all  of the  Company's  oil  hedges  were
designated as hedges of United States forecasted sales. The following table sets
forth the Bbls hedged under  outstanding  oil hedge  contracts  and the weighted
average NYMEX prices per Bbl for those contracts as of September 30, 2005:



                                     First          Second          Third           Fourth        Outstanding
                                    Quarter         Quarter        Quarter          Quarter         Average
                                 -------------   -------------   -------------   -------------   -------------
                                                                                  
  Average daily oil production
     hedged:
      2005 - Swap Contracts
        Volume (Bbl)...........                                                         27,000          27,000
        Price per Bbl..........                                                  $       27.97   $       27.97

      2006 - Swap Contracts
        Volume (Bbl)...........         10,000          10,000          10,000          10,000          10,000
        Price per Bbl..........  $       31.69   $       31.69   $       31.69   $       31.69   $       31.69

      2006 - Collar Contracts
        Volume (Bbl)...........          8,500           9,000           9,500           9,500           9,129
        Price per Bbl..........  $43.82-$73.43   $44.17-$74.63   $44.47-$75.70   $44.47-$75.70   $44.25-$74.92

      2007 - Swap Contracts
        Volume (Bbl)...........         13,000          13,000          13,000          13,000          13,000
        Price per Bbl..........  $       30.89   $       30.89   $       30.89   $       30.89   $       30.89

      2007 - Collar Contracts
        Volume (Bbl)...........          4,500           4,500           4,500           4,500           4,500
        Price per Bbl..........  $50.00-$90.43   $50.00-$90.43   $50.00-$90.43   $50.00-$90.43   $50.00-$90.43

      2008 - Swap Contracts
        Volume (Bbl)...........         17,000          17,000          17,000          17,000          17,000
        Price per Bbl..........  $       29.21   $       29.21   $       29.21   $       29.21   $       29.21


     The Company reports average oil prices per Bbl including the effects of oil
quality  adjustments and the net effect of oil hedges.  The following table sets
forth the  Company's  oil  prices  from  continuing  operations,  both  reported
(including hedge results) and realized  (excluding  hedge results),  and the net
effect of  settlements of oil price hedges on oil revenue for the three and nine
months ended September 30, 2005 and 2004:


                                                        Three months ended     Nine months ended
                                                           September 30,          September 30,
                                                       -------------------   -------------------
                                                         2005       2004       2005       2004
                                                       --------   --------   --------   --------

                                                                            
     Average price reported per Bbl.................   $  40.66   $  33.29   $  36.56   $  30.46
     Average price realized per Bbl.................   $  56.64   $  39.50   $  49.14   $  35.59
     Reduction to oil revenue (in millions) (a).....   $  (61.6)  $  (25.3)  $ (150.7)  $  (61.2)
<FN>
- ---------
(a)  Excludes  hedge  losses of $3.1 million and $2.3  million  attributable  to
     discontinued  operations for the three months ended  September 30, 2005 and
     2004, respectively,  and $11.1 million and $7.4 million attributable to the
     nine months ended September 30, 2005 and 2004, respectively.
</FN>


     Natural  gas  liquids  prices.  During  the  three  and nine  months  ended
September  30,  2005 and 2004,  the  Company  did not  enter  into any NGL hedge
contracts. There were no outstanding NGL hedge contracts at September 30, 2005.


                                       20




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     Gas prices.  The  Company  employs a policy of hedging a portion of its gas
production based on the index price upon which the gas is actually sold in order
to mitigate the basis risk between  NYMEX  prices and actual  index  prices,  or
based on NYMEX  prices if NYMEX  prices  are  highly  correlated  with the index
price. As of September 30, 2005, all of the Company's gas hedges were designated
as hedges of United States and Canadian  forecasted  sales.  The following table
sets forth the MMBtus  hedged  under  outstanding  gas hedge  contracts  and the
weighted  average index prices per MMBtu for those contracts as of September 30,
2005:



                                              First         Second         Third          Fourth        Outstanding
                                             Quarter        Quarter        Quarter        Quarter         Average
                                           ------------   ------------   ------------   ------------   --------------
                                                                                        
Average daily gas production hedged:
   2005 - Swap Contracts
     Volume (MMBtu).....................                                                     253,535         253,535
     Index price per MMBtu..............                                                $       5.17   $        5.17

   2006 - Swap Contracts
     Volume (MMBtu).....................         73,710         73,790         73,880         73,984          73,842
     Index price per MMBtu..............   $       4.30   $       4.30   $       4.31   $       4.31   $        4.30

   2006 - Collar Contracts
     Volume (MMBtu).....................        200,000        175,000        175,000        185,000         183,685
     Index price per MMBtu..............   $6.72-$13.17   $6.58-$13.90   $6.58-$13.90   $6.58-$14.11   $ 6.62-$13.76

   2007 - Swap Contracts
     Volume (MMBtu).....................         29,071         29,146         29,231         29,329          29,195
     Index price per MMBtu..............   $       4.27   $       4.28   $       4.29   $       4.29   $        4.28

   2007 - Collar Contracts
     Volume (MMBtu).....................        215,000        215,000        215,000        215,000         215,000
     Index price per MMBtu..............   $6.57-$11.84   $6.57-$11.84   $6.57-$11.84   $6.57-$11.84   $ 6.57-$11.84

   2008 - Swap Contracts
     Volume (MMBtu).....................          5,000          5,000          5,000          5,000           5,000
     Index price per MMBtu..............   $       5.38   $       5.38   $       5.38   $       5.38   $        5.38


     The Company reports average gas prices per Mcf including the effects of Btu
content, gas processing, shrinkage adjustments and the net effect of gas hedges.
The  following  table  sets  forth the  Company's  gas  prices  from  continuing
operations,  both reported  (including  hedge  results) and realized  (excluding
hedge  results),  and the net effect of  settlements  of gas price hedges on gas
revenue for the three and nine months ended September 30, 2005 and 2004:


                                                       Three months ended     Nine months ended
                                                          September 30,          September 30,
                                                       -------------------   -------------------
                                                         2005       2004       2005       2004
                                                       --------   --------   --------   --------

                                                                            
     Average price reported per Mcf.................   $   5.70   $   4.11   $   5.33   $   4.27
     Average price realized per Mcf.................   $   6.68   $   4.55   $   5.82   $   4.65
     Reduction to gas revenue (in millions) (a).....   $  (57.7)  $  (25.7)  $  (91.6)  $  (67.2)
<FN>
- ---------
(a)  Excludes  hedge  losses of $2.5 million and $6.9  million  attributable  to
     discontinued  operations for the three and nine months ended  September 30,
     2004.
</FN>


     Hedge ineffectiveness. During the three and nine months ended September 30,
2005, the Company recognized hedge  ineffectiveness  charges to other expense of
$12.3  million  and $23.8  million,  respectively,  as compared to a gain of $.3
million and a charge of $1.5 million during the same respective periods of 2004.


                                       21




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     Accumulated other comprehensive  income (loss) - net deferred hedge losses,
net of tax ("AOCI - Hedging").  As of September  30, 2005 and December 31, 2004,
AOCI - Hedging  represented  net  deferred  losses of $698.7  million and $241.4
million,  respectively.  The AOCI - Hedging balance as of September 30, 2005 was
comprised of $1.1 billion of net deferred  losses on the  effective  portions of
open cash flow hedges,  $31.9 million of net deferred  losses on terminated cash
flow hedges  (including  $3.2 million of net deferred  losses on terminated cash
flow  interest rate hedges) and $431.2  million of  associated  net deferred tax
benefits.  The increase in AOCI - Hedging during the nine months ended September
30, 2005 was  primarily  attributable  to increases in future  commodity  prices
relative to the commodity prices  stipulated in the hedge  contracts,  partially
offset by the  reclassification  of net  deferred  hedge losses to net income as
derivatives matured by their terms. The net deferred losses associated with open
cash flow hedges remain subject to market price fluctuations until the positions
are either settled under the terms of the hedge contracts or terminated prior to
settlement. The net deferred losses on terminated cash flow hedges are fixed.

     During  the twelve  months  ending  September  30,  2006,  based on current
estimates of future commodity  prices,  the Company expects to reclassify $538.3
million of net deferred losses  associated  with open commodity  hedges and $7.3
million  of net  deferred  losses on  terminated  commodity  hedges  from AOCI -
Hedging  to oil and  gas  revenues.  The  Company  also  expects  to  reclassify
approximately $199.2 million of net deferred income tax benefits associated with
commodity  hedges during the twelve months ending September 30, 2006 from AOCI -
Hedging to income tax benefit.

     The following  table sets forth,  as of September  30, 2005,  the scheduled
amortization of net deferred gains (losses) on terminated  commodity hedges that
will be recognized as decreases in the case of losses, and increases in the case
of gains, to the Company's future oil and gas revenues:


                                              First     Second      Third     Fourth
                                             Quarter    Quarter    Quarter    Quarter     Total
                                             -------    -------    -------    -------    --------
                                                                (in thousands)

                                                                          
   2005 net deferred hedge losses.........                                    $(1,873)   $ (1,873)
   2006 net deferred hedge losses.........   $(5,098)   $  (302)    $   (59)  $  (727)   $ (6,186)
   2007 net deferred hedge gains (losses).   $(3,764)   $   148     $   424   $  (347)   $ (3,539)
   2008 net deferred hedge losses.........   $(2,877)   $  (372)    $  (284)  $  (839)   $ (4,372)
   2009 net deferred hedge losses.........   $(2,330)   $  (232)    $  (230)  $  (822)   $ (3,614)
   2010 net deferred hedge losses.........   $  (667)   $  (620)    $  (578)  $  (539)   $ (2,404)
   2011 net deferred hedge losses.........   $  (873)   $  (889)    $  (903)  $  (906)   $ (3,571)
   2012 net deferred hedge losses.........   $  (810)   $  (791)    $  (784)  $  (772)   $ (3,157)
                                                                                          -------
                                                                                         $(28,716)
                                                                                          =======


NOTE H.     Asset Retirement Obligations

     The Company's asset retirement  obligations  primarily relate to the future
plugging  and  abandonment  of proved  properties  and related  facilities.  The
Company  does not  provide  for a market  risk  premium  associated  with  asset
retirement  obligations  because a reliable  estimate cannot be determined.  The
Company has no assets that are legally restricted for purposes of settling asset
retirement  obligations.  The following  table  summarizes  the Company's  asset
retirement obligation transactions recorded in accordance with the provisions of
SFAS 143,  "Accounting for Asset  Retirement  Obligations"  during the three and
nine months ended September 30, 2005 and 2004:


                                       22




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)



                                                     Three months ended         Nine months ended
                                                        September 30,             September 30,
                                                   ----------------------    ----------------------
                                                      2005         2004         2005         2004
                                                   ---------    ---------    ---------    ---------
                                                                   (in thousands)

                                                                              
     Beginning asset retirement obligations.....   $ 117,753    $ 108,820    $ 120,879    $ 105,036
       Liabilities assumed in acquisitions......       3,013       14,541        3,013       14,541
       New wells placed on production and
          changes in estimates (a)..............      32,813          170       35,408        3,238
       Disposition of wells.....................     (17,863)         -        (23,101)         -
       Liabilities settled......................      (3,311)      (1,082)      (7,566)      (4,060)
       Accretion of discount....................       1,968        2,030        6,210        6,012
       Currency translation.....................         754          619          284          331
                                                    --------     --------     --------     --------
     Ending asset retirement obligations .......   $ 135,127    $ 125,098    $ 135,127    $ 125,098
                                                    ========     ========     ========     ========
<FN>
- -----------
(a)  Includes,  for the three and nine month periods ended September 30, 2005, a
     $32.8  million  increase in the  abandonment  estimate of the East  Cameron
     facilities that were destroyed by Hurricane Rita. See Note N for additional
     information regarding this loss.
</FN>


     The Company records the current and noncurrent portions of asset retirement
obligations  in other current  liabilities  and other  liabilities  and minority
interests, respectively, in the accompanying Consolidated Balance Sheets.

NOTE I.     Postretirement Benefit Obligations

     As of September  30, 2005 and  December 31, 2004,  the Company had recorded
$15.4  million  and  $15.5  million,   respectively,   of  unfunded  accumulated
postretirement benefit obligations, the current and noncurrent portions of which
are included in other current  liabilities  and other  liabilities  and minority
interests, respectively, in the accompanying Consolidated Balance Sheets.

     The  following  table   reconciles   changes  in  the  Company's   unfunded
accumulated  postretirement benefit obligations during the three and nine months
ended September 30, 2005 and 2004:



                                                       Three months ended       Nine months ended
                                                          September 30,           September 30,
                                                      --------------------    --------------------
                                                        2005        2004        2005        2004
                                                      --------    --------    --------    --------
                                                                     (in thousands)
                                                                              
    Beginning accumulated postretirement benefit
      obligations..................................   $ 15,517    $ 15,611    $ 15,534    $ 15,556
       Benefit payments............................       (413)       (244)     (1,042)       (758)
       Service costs...............................         81          59         243         176
       Accretion of discounts......................        225         226         675         678
                                                       -------     -------     -------     -------
    Ending accumulated postretirement benefit
      obligations..................................   $ 15,410    $ 15,652    $ 15,410    $ 15,652
                                                       =======     =======     =======     =======


NOTE J.     Commitments and Contingencies

     Legal actions.  The Company is party to various legal actions incidental to
its business,  including,  but not limited to, the proceedings  described below.
The majority of these legal actions primarily involve claims for damages arising
from oil and gas leases and ownership  interest  disputes.  The Company believes
that the ultimate  disposition  of these legal  actions will not have a material
adverse  effect on the Company's  consolidated  financial  position,  liquidity,
capital resources or future results of operations.  The Company will continue to
evaluate its litigation  matters on a quarter-by-  quarter basis and will adjust
its  litigation  reserves as  appropriate  to reflect its assessment of the then
current status of litigation.

                                       23




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)



     Alford.  The Company is party to a 1993 class action  lawsuit  filed in the
26th Judicial District Court of Stevens County, Kansas by two classes of royalty
owners,  one for  each  of the  Company's  gathering  systems  connected  to the
Company's Satanta gas plant. The case was relatively inactive for several years.
In early 2000, the plaintiffs  amended their pleadings and the case now contains
two material  claims.  First,  the plaintiffs  assert that they were  improperly
charged expenses  (primarily field  compression),  which plaintiffs allege are a
"cost of  production",  and for which the  plaintiffs  claim  they,  as  royalty
owners,  are not responsible.  Second, the plaintiffs claim they are entitled to
100 percent of the value of the helium  extracted at the  Company's  Satanta gas
plant.  If the  plaintiffs  were to  prevail  on the above  two  claims in their
entirety,  it is possible that the Company's liability (both for periods covered
by the  lawsuit  and from the last date  covered by the lawsuit to the present -
because the deductions  continue to be taken and the  plaintiffs  continue to be
paid for a royalty  share of the helium) could reach  approximately  $34 million
related to the cost of production claim and approximately $42 million related to
the helium claim, plus prejudgment  interest.  However,  the Company believes it
has  valid  defenses  to the  plaintiffs'  claims  and has paid  the  plaintiffs
properly  under their  respective oil and gas leases and other  agreements,  and
intends to vigorously defend itself.

     The  Company  does not  believe  the costs it has  deducted  are a "cost of
production".  The costs being  deducted are post  production  costs  incurred to
transport the gas to the Company's  Satanta gas plant for processing,  where the
valuable  hydrocarbon  liquids  and  helium  are  extracted  from the  gas.  The
plaintiffs  benefit from such extractions and the Company believes that charging
the  plaintiffs  with  their  proportionate  share  of such  transportation  and
processing  expenses  is  consistent  with  Kansas  law and  with  the  parties'
agreements.

     The Company has also vigorously  defended against plaintiffs' claims to 100
percent of the value of the helium  extracted,  and believes  that in accordance
with  applicable  law, it has  properly  accounted to the  plaintiffs  for their
fractional  royalty share of the helium under the specified  royalty  clauses of
the respective oil and gas leases.  The Company has not  established a provision
for the helium claim.

     The  factual  evidence  in the case  was  presented  to the  26th  Judicial
District Court without a jury in December 2001. Oral arguments were heard by the
court in April 2002,  and  although  the court has not yet entered a judgment or
findings,  it could do so at any time. The Company strongly denies the existence
of any material  underpayment to the plaintiffs and believes it presented strong
evidence at trial to support its positions. However, either through a negotiated
settlement or court ruling,  the Company could have to pay some part of the cost
of  production  claim and,  accordingly,  the Company has  established a partial
reserve for this claim.  Although the amount of any resulting liability,  to the
extent that it exceeds the Company's  provision,  could have a material  adverse
effect on the Company's results of operations for the quarterly reporting period
in which such  liability is recorded,  the Company does not expect that any such
additional  liability will have a material  adverse  effect on its  consolidated
financial  position as a whole or on its liquidity,  capital resources or future
annual results of operations.

     MOSH  Holding.  The Company and its  principal  United  States  subsidiary,
Pioneer  Natural  Resources USA, Inc., were named as defendants in MOSH Holding,
L.P. v Pioneer Natural Resources  Company;  Pioneer Natural Resources USA, Inc.;
Woodside  Energy (USA) Inc.; and JPMorgan Chase Bank, NA, as Trustee of the Mesa
Offshore  Trust,  which was filed on April 11, 2005,  in the  District  Court of
Travis County, Texas (250th Judicial District). The plaintiff is a unitholder in
the Mesa Offshore  Trust,  which was created in 1982 as the sole limited partner
in a partnership  that holds an overriding  royalty  interest in certain oil and
gas leases offshore Louisiana and Texas. The plaintiff alleges that the Company,
together with Woodside  Energy (USA) Inc.  ("Woodside"),  concealed the value of
the royalty interest and worked to terminate the Mesa Offshore Trust prematurely
and to capture for itself and Woodside  profits that belong to the Mesa Offshore
Trust. The plaintiff also alleges breaches of fiduciary duty,  misapplication of
trust property, common law fraud, gross negligence, and breach of the conveyance
agreement  for the  overriding  royalty  interest.  The claims  appear to relate
principally  to  farmout  arrangements  established  in 2003  for  two  offshore
properties,  the Brazos Area Block A-7 and Brazos  Area Block  A-39.  The relief
sought by the  plaintiff  includes  monetary  and  punitive  damages and certain
equitable  relief,  including  an  accounting  of expenses,  a setting  aside of
certain farmouts, and a temporary and permanent injunction. The Company believes
the claims are without merit and intends to defend the lawsuit vigorously.

                                       24




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     Argentine Environmental.  The Company's subsidiary in Argentina is involved
in various  administrative  proceedings  with  environmental  authorities in the
Neuquen Province  relating to permits for and discharges from operations in that
province. The Company's subsidiary is cooperating with the proceedings, although
it from time to time challenges  whether certain assessed fines are appropriate.
The  Company  estimates  that  fines  assessed  in  these  proceedings  will  be
immaterial, but in the aggregate could exceed $100,000. The Company's subsidiary
in  Argentina  has also  been  named in a suit  against  various  oil  companies
operating in the Neuquen  basin  entitled  Asociacion  de  Superficiarios  de la
Patagonia v. YPF S.A.,  et. al.,  originally  filed on August 21,  2003,  in the
Argentine National Supreme Court of Justice. The plaintiffs,  a private group of
landowners,  have also named the national  government  and several  provinces as
third parties.  The lawsuit alleges injury to the  environment  generally by the
oil and gas industry  without  specifically  alleging how any of the  defendants
caused this injury. The plaintiffs  principally seek creation of an insured fund
to remediate the environment.  The Company's subsidiary intends to defend itself
in the case.  Although  the suit is at an early  procedural  stage and  involves
novel  theories,  the  Company  does not believe  that the  lawsuit  will have a
material adverse effect on its business or financial condition.

     Dorchester  Refining  Company  Site. A  subsidiary  of the Company has been
notified by a letter from the Texas Commission on Environmental Quality ("TCEQ")
dated August 24, 2005 that the TCEQ considers the subsidiary to be a potentially
responsible  party  with  respect  to  the  Dorchester  Refining  Company  State
Superfund  Site  located  in  Mount  Pleasant,  Texas.  In  connection  with the
acquisition  of oil and gas  assets in 1991,  the  Company  acquired  a group of
companies,  one of which was an entity that had owned a refinery  located at the
Mount Pleasant site from 1977 until 1984.  According to the TCEQ,  this refinery
was  responsible  for releases of  hazardous  substances  into the  environment.
Pursuant to applicable Texas law, the Company's  subsidiary,  which does not own
any  material  assets or  conduct  any  material  operations,  may be subject to
strict,  joint and  several  liability  for the costs of  conducting  a study to
evaluate  potential  remedial  options  and  for the  costs  of  performing  any
remediation  ultimately  required  by the TCEQ.  The  Company  does not know the
nature  and  extent  of  the  alleged  contamination,  the  potential  costs  of
remediation,  or the portion, if any, of such costs that may be allocable to the
Company's  subsidiary;  however,  the Company has noted that there  appear to be
other operators or owners who may share  responsibility for these costs and does
not believe that this matter will have a material adverse effect on its business
or financial condition.

     Environmental  Protection  Agency  Investigation.  On November 4, 2005, the
Company learned from the U.S.  Environmental  Protection Agency ("EPA") that the
agency was conducting a criminal  investigation  into a 2003 spill that occurred
at a Company-operated  drilling rig located on an ice island offshore Kuparuk in
Harrison  Bay,  Alaska.  The spill was  previously  investigated  by the  Alaska
Department of Environmental Conservation ("ADEC") and, following completion of a
clean up, the ADEC issued a letter stating its determination that, at that time,
the site  did not pose a threat  to human  health,  safety,  or  welfare  or the
environment. The Company intends to cooperate with the EPA's investigation.

NOTE K.     Income Per Share From Continuing Operations

     Basic income per share from  continuing  operations is computed by dividing
income from  continuing  operations  by the  weighted  average  number of common
shares  outstanding for the period.  The computation of diluted income per share
from continuing  operations  reflects the potential dilution that could occur if
securities or other  contracts to issue common stock that are dilutive to income
from  continuing  operations  were  exercised or converted  into common stock or
resulted in the  issuance of common  stock that would then share in the earnings
of the Company.



                                       25





                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     The following  table is a  reconciliation  of basic income from  continuing
operations to diluted income from  continuing  operations for the three and nine
months ended September 30, 2005 and 2004:


                                                           Three months ended         Nine months ended
                                                              September 30,             September 30,
                                                         ----------------------    ----------------------
                                                            2005        2004          2005         2004
                                                         ---------    ---------    ---------    ---------
                                                                                (in thousands)

                                                                                    
   Basic income from continuing operations............   $ 104,587    $  77,074    $ 283,287    $ 201,415
   Interest expense on convertible notes, net of tax..         802          -          2,405          -
                                                          --------     --------     --------     --------
   Diluted income from continuing operations..........   $ 105,389    $  77,074    $ 285,692    $ 201,415
                                                          ========     ========     ========     ========


     The following table is a  reconciliation  of basic weighted  average common
shares outstanding to diluted weighted average common shares outstanding for the
three and nine months ended September 30, 2005 and 2004:


                                                           Three months ended         Nine months ended
                                                              September 30,             September 30,
                                                         ----------------------    ----------------------
                                                            2005        2004          2005         2004
                                                         ---------    ---------    ---------    ---------
                                                                                (in thousands)

                                                                                    
   Weighted average common shares outstanding (a):
      Basic...........................................     137,655      118,663      140,436      118,745
      Dilutive common stock options (b)...............       1,106        1,067        1,169        1,108
      Restricted stock awards.........................         698          567          838          468
      Convertible notes dilution (c)..................       2,327          -          2,327          -
                                                          --------      -------     --------     --------
      Diluted.........................................     141,786      120,297      144,770      120,321
                                                          ========      =======     ========     ========
<FN>
- ---------------
(a)  During August 2005, the Company's  board of directors  approved a new share
     repurchase  program  authorizing  the  purchase  of up to $1 billion of the
     Company's  common stock,  $650 million of which was  immediately  initiated
     through open market transactions. As of September 30, 2005, the Company had
     repurchased 9.0 million shares at an aggregate cost of $390.7 million under
     the $650 million  program.  During  October 2005,  the Company  repurchased
     another 4.9 million shares at an aggregate cost of $250.0 million  pursuant
     to a repurchase plan  conforming to the  requirements of Rule 10b5-1 of the
     Securities Exchange Act of 1934. The $650 million program is expected to be
     completed by the end of 2005.  The remaining $350 million is subject to the
     completion of the deepwater Gulf of Mexico and Argentine divestments.
(b)  Common  stock  options to purchase  761,313  shares and  274,246  shares of
     common  stock were  outstanding  but not  included in the  computations  of
     diluted income per share from continuing  operations for the three and nine
     months ended  September 30, 2004 because the exercise prices of the options
     were greater than the average  market price of the common  shares and would
     be anti-dilutive to the computations.
(c)  Associated with the Evergreen merger, the Company assumed convertible notes
     eligible  for  2.3  million  shares  of the  Company's  common  stock  upon
     conversion.
</FN>


NOTE L.     Geographic Operating Segment Information

     The Company has operations in only one industry segment, that being the oil
and  gas  exploration  and  production   industry;   however,   the  Company  is
organizationally  structured along geographic operating segments or regions. The
Company has reportable  operations in the United States,  Argentina,  Canada and
Africa and Other.  Africa and Other is  primarily  comprised  of  operations  in
Equatorial Guinea, Gabon, Nigeria, South Africa and Tunisia.



                                       26




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     As previously referred to in Note B, during 2005, the Company sold Canadian
and United States oil and gas properties having carrying values of $58.9 million
and  $31.4  million,  respectively,  on  their  dates of sale.  The  results  of
operations of those properties have been reclassified as discontinued operations
in accordance with GAAP and are excluded from the geographic  operating  segment
information  provided below. See Note O for information  regarding the Company's
discontinued operations.

     The following  tables provide the Company's  interim  geographic  operating
segment  data for the three and nine months ended  September  30, 2005 and 2004.
Geographic  operating  segment  income  tax  benefits   (provisions)  have  been
determined  based on statutory  rates existing in the various tax  jurisdictions
where the Company has oil and gas producing activities. The "Headquarters" table
column  includes  income and  expenses  that are not  routinely  included in the
earnings measures  internally  reported to management on a geographic  operating
segment basis.



                                       27




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)




                                         United                            Africa                    Consolidated
                                         States    Argentina    Canada    and Other   Headquarters       Total
                                        --------   ---------   --------   ---------   ------------   ------------
                                                                 (in thousands)
                                                                                   
Three months ended September 30, 2005:
 Revenues and other income:
   Oil and gas........................  $429,789   $ 46,048    $ 29,571   $  52,974      $    -        $ 558,382
   Interest and other.................       -          -           -           -           9,460          9,460
   Gain on disposition of assets, net.       290        -           -           -             104            394
                                         -------    -------     -------    --------       -------       --------
                                         430,079     46,048      29,571      52,974         9,564        568,236
                                         -------    -------     -------    --------       -------       --------
 Costs and expenses:
   Oil and gas production.............    90,082     10,125       9,766       8,449           -          118,422
   Depletion, depreciation and
      amortization....................    91,872     23,232       8,988       6,796         5,479        136,367
   Impairment of long-lived assets....       -          -           -            21           -               21
   Exploration and abandonments.......    47,994      6,597       1,405       8,202           -           64,198
   General and administrative.........       -          -           -           -          32,749         32,749
   Accretion of discount on asset
      retirement obligations..........       -          -           -           -           1,968          1,968
   Interest...........................       -          -           -           -          29,268         29,268
   Other..............................       -          -           -           -          38,173         38,173
                                         -------    -------     -------    --------       -------       --------
                                         229,948     39,954      20,159      23,468       107,637        421,166
                                         -------    -------     -------    --------       --------      --------
  Income (loss) from continuing
    operations before income taxes....   200,131      6,094       9,412      29,506       (98,073)       147,070
  Income tax benefit (provision)......   (73,048)    (2,134)     (3,435)    (10,905)       47,039        (42,483)
                                         -------    -------     -------    --------       -------       --------
  Income (loss) from continuing
    operations........................  $127,083   $  3,960    $  5,977   $  18,601      $(51,034)     $ 104,587
                                         =======    =======     =======    ========       =======       ========

Three months ended September 30, 2004:
 Revenues and other income:
   Oil and gas........................  $341,241   $ 40,288    $ 10,170   $  33,876      $    -        $ 425,575
   Interest and other.................       -          -           -           -           1,212          1,212
   Gain on disposition of assets, net.       -          -           -           -             215            215
                                         -------    -------     -------    --------       -------       --------
                                         341,241     40,288      10,170      33,876         1,427        427,002
                                         -------    -------     -------    --------       -------       --------
 Costs and expenses:
   Oil and gas production.............    58,198      8,917       3,761       4,219           -           75,095
   Depletion, depreciation and
      amortization....................   103,085     17,304       4,844       7,333         2,893        135,459
   Impairment of long-lived assets....       -          -           -        34,825           -           34,825
   Exploration and abandonments.......    18,543      2,898       4,135       7,306           -           32,882
   General and administrative.........       -          -           -           -          19,431         19,431
   Accretion of discount on asset
      retirement obligations..........       -          -           -           -           2,030          2,030
   Interest...........................       -          -           -           -          24,827         24,827
   Other..............................       -          -           -           -           2,486          2,486
                                         -------    -------     -------    --------       -------       --------
                                         179,826     29,119      12,740      53,683        51,667        327,035
                                         -------    -------     -------    --------       -------       --------
  Income (loss) from continuing
    operations before income taxes....   161,415     11,169      (2,570)    (19,807)      (50,240)        99,967
  Income tax benefit (provision)......   (58,916)    (3,909)        970       7,876        31,086        (22,893)
                                         -------    -------     -------    --------       -------       --------
  Income (loss) from continuing
    operations........................  $102,499   $  7,260    $ (1,600)  $ (11,931)     $(19,154)     $  77,074
                                         =======    =======     =======    ========       =======       ========



                                       28




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)



                                          United                            Africa                    Consolidated
                                          States     Argentina    Canada    and Other   Headquarters       Total
                                        ----------   ---------   --------   ---------   ------------   ------------
                                                                  (in thousands)
                                                                                    
Nine months ended September 30, 2005:
 Revenues and other income:
   Oil and gas........................  $1,245,026   $124,857    $ 73,620   $ 149,967      $     -      $1,593,470
   Interest and other.................         -          -           -           -           85,689        85,689
   Gain on disposition of assets, net.       2,322        -           -           -              441         2,763
                                         ---------    -------     -------    --------       --------     ---------
                                         1,247,348    124,857      73,620     149,967         86,130     1,681,922
                                         ---------    -------     -------    --------       --------     ---------
 Costs and expenses:
   Oil and gas production.............     252,125     27,527      27,370      23,849            -         330,871
   Depletion, depreciation and
      amortization....................     308,401     61,050      23,429      23,434         15,446       431,760
   Impairment of long-lived assets....         -          -           -           644            -             644
   Exploration and abandonments.......     119,933     15,031       7,828      40,879            -         183,671
   General and administrative.........         -          -           -           -           91,551        91,551
   Accretion of discount on asset
      retirement obligations..........         -          -           -           -            6,210         6,210
   Interest...........................         -          -           -           -           92,731        92,731
   Other..............................         -          -           -           -           67,475        67,475
                                         ---------    -------     -------    --------       --------     ---------
                                           680,459    103,608      58,627      88,806        273,413     1,204,913
                                         ---------    -------     -------    --------       --------     ---------
  Income (loss) from continuing
    operations before income taxes....     566,889     21,249      14,993      61,161       (187,283)      477,009
  Income tax benefit (provision)......    (206,915)    (7,438)     (5,472)    (21,440)        47,543      (193,722)
                                         ---------    -------     -------    --------       --------     ---------
  Income (loss) from continuing
    operations........................  $  359,974   $ 13,811    $  9,521   $  39,721      $(139,740)   $  283,287
                                         =========    =======     =======    ========       ========     =========

Nine months ended September 30, 2004:
 Revenues and other income:
   Oil and gas........................  $1,029,625   $ 97,785    $ 31,685   $ 106,649      $     -      $1,265,744
   Interest and other.................         -          -           -           -            4,557         4,557
   Gain (loss) on disposition of
     assets, net......................          51        -          (252)        -              171           (30)
                                         ---------    -------     -------    --------       --------     ---------
                                         1,029,676     97,785      31,433     106,649          4,728     1,270,271
                                         ---------    -------     -------    --------       --------     ---------
 Costs and expenses:
   Oil and gas production.............     165,146     24,092      12,417      21,052            -         222,707
   Depletion, depreciation and
      amortization....................     302,127     44,666      15,177      35,466          8,322       405,758
   Impairment of long-lived assets....         -          -           -        34,825            -          34,825
   Exploration and abandonments.......      83,933     14,295      17,527      36,478            -         152,233
   General and administrative.........         -          -           -           -           54,846        54,846
   Accretion of discount on asset
      retirement obligations..........         -          -           -           -            6,012         6,012
   Interest...........................         -          -           -           -           67,805        67,805
   Other..............................         -          -           -           -           10,982        10,982
                                         ---------    -------     -------    --------       --------     ---------
                                           551,206     83,053      45,121     127,821        147,967       955,168
                                         ---------    -------     -------    --------       --------     ---------
  Income (loss) from continuing
    operations before income taxes....     478,470     14,732     (13,688)    (21,172)      (143,239)      315,103
  Income tax benefit (provision)......    (174,642)    (5,156)      5,167       8,669         52,274      (113,688)
                                         ---------    -------     -------    --------       --------     ---------
  Income (loss) from continuing
    operations........................  $  303,828   $  9,576    $ (8,521)  $ (12,503)     $ (90,965)   $  201,415
                                         =========    =======     =======    ========       ========     =========



                                       29




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


NOTE M.     Volumetric Production Payments

     During  January  2005,  the Company  sold two  percent of its total  proved
reserves,  or  20.5  MMBOE  of  proved  reserves,  by  means  of two  volumetric
production  payment  ("VPP")  agreements  for net  proceeds  of $592.3  million,
including the assignment of the Company's  obligations under certain  derivative
hedge  agreements.  Proceeds  from  the  VPPs  were  initially  used  to  reduce
outstanding indebtedness. The first January VPP sold 58 Bcf of Hugoton field gas
volumes over an expected  five-year  term that began in February 2005 for $275.2
million.  The second January VPP sold 10.8 MMBbls of Spraberry field oil volumes
over an expected seven-year term beginning in January 2006 for $317.1 million.

     During  April  2005,  the  Company  sold less than one percent of its total
proved reserves,  or 7.3 MMBOE of proved  reserves,  by means of another VPP for
net  proceeds of $300.4  million,  including  the  assignment  of the  Company's
obligations  under certain  derivative hedge  agreements.  Proceeds from the VPP
were initially used to reduce outstanding  indebtedness.  The April VPP sold 6.0
Bcf of Spraberry field gas volumes over an expected  32-month term that began in
May  2005 and 6.2  MMBbls  of  Spraberry  field  oil  volumes  over an  expected
five-year term beginning in January 2006.

     The Company's VPPs represent  limited-term  overriding royalty interests in
oil and gas reserves  which:  (i) entitle the  purchaser  to receive  production
volumes over a period of time from specific lease  interests;  (ii) are free and
clear of all associated future production costs and capital expenditures;  (iii)
are nonrecourse to the Company (i.e.,  the  purchaser's  only recourse is to the
assets acquired); (iv) transfer title to the purchaser and (v) allow the Company
to retain the assets after the VPPs volumetric quantities have been delivered.

     Under  SFAS 19,  a VPP is  considered  a sale of  proved  reserves  and the
related future production of those proved reserves. As a result, the Company (i)
removed the proved  reserves  associated  with the VPPs; (ii) recognized the VPP
proceeds as deferred  revenue which are being amortized on a  unit-of-production
basis  to oil and gas  revenues  over  the  terms of the  VPPs;  (iii)  retained
responsibility for 100 percent of the production costs and capital costs related
to VPP interests and (iv) no longer  recognizes  production  associated with the
VPP volumes.

     The  following  table  represents  the  breakdown of the  components of the
Company's VPPs:



                                                   January VPPs                     April VPP
                                            --------------------------    -------------------------
                                              Hugoton      Spraberry      Spraberry      Spraberry
                                            Field (Gas)    Field (Oil)    Field (Gas)    Field (Oil)      Total
                                            -----------    -----------    -----------    -----------    -----------
                                                                      (in thousands)

                                                                                         
  VPP proceeds, net of transaction costs..  $   275,161    $   317,120    $    37,611    $   262,779    $   892,671
  Fair value of derivatives conveyed (a)..       12,860         36,759          (526)        (11,076)        38,017
                                             ----------     ----------     ---------      ----------     ----------
  Deferred revenue........................      288,021        353,879        37,085         251,703        930,688
  Less 2005 amortization..................      (47,677)           -          (6,279)            -          (53,956)
                                             ----------     ----------     ---------      ----------     ----------
       Deferred revenue at
       September 30, 2005.................  $   240,344    $   353,879    $   30,806     $   251,703    $   876,732
                                             ==========     ==========     =========      ==========     ==========
<FN>
- -----------
(a)  Represents the fair value of the derivative obligations conveyed as part of
     the VPP  transactions.  The fair value is deferred in AOCI - Hedging  until
     the delivery of the VPP volumes  occurs at which time the fair value of the
     derivative  obligations  attributable  to the  delivered  volumes  is being
     recognized  as increases or decreases to oil and gas  revenues.  See Note G
     for additional discussion regarding the Company's hedge positions.
</FN>



                                       30




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     The  above  deferred  revenue  amounts  will be  recognized  in oil and gas
revenues in the Consolidated  Statements of Operations as noted below,  assuming
the related VPP production volumes are delivered as scheduled (in thousands):


                                                         
           Remaining 2005................................      $   21,818
           2006..........................................         190,347
           2007..........................................         181,250
           2008..........................................         158,151
           2009..........................................         147,919
           2010..........................................          90,227
           2011..........................................          44,951
           2012..........................................          42,069
                                                                ---------
                                                               $  876,732
                                                                =========


NOTE N.     Insurance Claims

     Hurricane Ivan.  During September 2004, the Company  sustained damages as a
result of  Hurricane  Ivan at its  Devils  Tower  and  Canyon  Express  platform
facilities in the deepwater Gulf of Mexico.  The damages delayed  scheduled well
completions  and interrupted  production  during the second half of 2004 and the
first  half of 2005.  The  Company  maintains  business  interruption  insurance
coverage for such circumstances.  During 2004, the Company filed claims with its
insurance providers for its estimated losses associated with Hurricane Ivan.

     Based on a  settlement  agreement  between the  Company  and the  insurance
providers,  the  Company  recovered  business  interruption  losses  related  to
Hurricane  Ivan of $67  million.  The Company  recorded  $7.6  million and $59.4
million  of the  claims in the  fourth  quarter of 2004 and in the first half of
2005,  respectively,  in interest and other income in the Company's Consolidated
Statements of Operations.

     Fain Plant. During May 2005, the Company sustained damages as a result of a
fire at its Fain gas plant in the West Panhandle field. The damages  interrupted
production from mid-May through mid-July of 2005. The Company maintains business
interruption and physical damage insurance  coverage for such  circumstances and
has filed  claims  with its  insurance  providers.  The  Company  estimates  its
aggregate  Fain  plant  business  interruption  claims to be  approximately  $19
million  to  $20  million,  of  which  amount  approximately  $14.2  million  is
undisputed  by the  insurance  provider.  The  Company is working to resolve the
disputed amounts with the insurance provider.  The Company recorded $4.8 million
and $14.2 million of the claims,  respectively,  in interest and other income in
the Company's  Consolidated  Statements of Operations  during the three and nine
months ended September 30, 2005.

     Hurricane  Katrina/Rita.  During  August and  September  2005,  the Company
sustained  damages  as a  result  of  Hurricanes  Katrina  and  Rita at  various
facilities in the Gulf of Mexico. Other than the East Cameron facility discussed
further below, the Company believes the damages to the facilities are covered by
physical  damage  insurance.  The Company also maintains  business  interruption
insurance  related  to  specifically  designated  assets in the event  there are
extended periods of revenue interruption.

     The Company filed a business interruption claim with its insurance provider
related  to its  Devils  Tower  field  resulting  from  its  inability  to  sell
production as a result of damages to third party  facilities.  Currently,  it is
expected  that the third  party  facilities  will be  capable of taking the full
production of the Devils Tower field in November  2005.  The Company's  business
interruption claim is expected to cover losses of revenues from mid-October 2005
(end of 45-day  deductible  waiting  period) until such point as the third party
facilities can take the full production from the Devils Tower field.



                                       31




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)


     As a result of Hurricane  Rita,  the  Company's  East Cameron  facility was
destroyed and the Company  currently does not plan to rebuild the facility based
on the  current  economics  of the  field.  The  Company  is in the  process  of
evaluating the magnitude of the loss.  Currently,  the Company estimates that it
will incur a minimum of $37 million to reclaim and  completely  abandon the East
Cameron  facility;   thus,  the  Company  recorded  an  additional   abandonment
obligation of approximately  $32.8 million in the third quarter of 2005 which is
included in  exploration  and  abandonments  in the  Consolidated  Statements of
Operations for the three and nine month periods ended September 30, 2005.

     The Company has filed a claim with its  insurance  provider  regarding  the
loss at East Cameron.  Under the Company's  insurance  policy,  the East Cameron
facility has the  following  coverages:  (a) $14 million of  scheduled  property
value for the  platform,  (b) $4  million  of  scheduled  business  interruption
insurance after a deductible  waiting  period,  (c) greater of (1) 25 percent of
the  scheduled  property  value of the  platform  or (2) $5  million  for debris
removal  coverage,  in total, for all assets per occurrence and (d) $100 million
of "make well safe" coverage, in total, for all assets per occurrence.

     The  Company  has not  recognized  a loss on the value of its East  Cameron
assets as the Company  believes  expected  proceeds from its insurance  coverage
will exceed the assets'  underlying  basis.  The Company will not  recognize any
recoveries  from the  business  interruption  coverage  until  after the  45-day
deductible waiting period, which is subsequent to mid-November 2005. The Company
believes that its debris removal and make well safe  coverages,  in combination,
will  substantially  cover the losses  incurred with the abandonment of the East
Cameron facility.  The Company has not recorded any estimated recoveries related
to  insurance  due to the  early  nature  of the  claim  and the need to  better
quantify the claim.

 NOTE O.    Discontinued Operations

     During May 2005, the Company sold its interests in the Martin Creek, Conroy
Black and Lookout  Butte oil and gas  properties  in Canada for net  proceeds of
$197.5 million,  resulting in a gain of $138.6 million.  During August 2005, the
Company sold its interests in certain oil and gas properties on the shelf of the
Gulf of Mexico for net proceeds of $58.9  million,  resulting in a gain of $27.5
million.

     During the three and nine months  ended  September  30,  2005,  the Company
recognized  income  from  discontinued  operations  of $19.0  million and $110.5
million, respectively, as compared to $3.8 million and $9.4 million for the same
respective periods of 2004. The following table represents the components of the
Company's discontinued  operations for the three and nine months ended September
30, 2005 and 2004:



                                       32




                        PIONEER NATURAL RESOURCES COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               September 30, 2005
                                   (Unaudited)



                                                           Three months ended         Nine months ended
                                                              September 30,             September 30,
                                                         ----------------------    ----------------------
                                                            2005         2004         2005         2004
                                                         ---------    ---------    ---------    ---------
                                                                          (in thousands)
                                                                                    
     Revenues and other income:
        Oil and gas...................................   $   6,446    $  16,149    $  43,868    $  47,438
        Gain on disposition of assets (a).............      27,476          -        166,137          -
                                                          --------     --------     --------     --------
                                                            33,922       16,149      210,005       47,438
                                                          --------     --------     --------     --------
     Costs and expenses:
        Oil and gas production........................       2,716        7,004       14,446       22,107
        Depletion, depreciation and amortization (a)..       1,445        4,532       11,211       13,482
        Exploration and abandonments (a)..............         (92)          83          241          921
        General and administrative....................         -             54          132          162
                                                          --------     --------     --------     --------
                                                             4,069       11,673       26,030       36,672
                                                          --------     --------     --------     --------
     Income from discontinued operations
        before income taxes...........................      29,853        4,476      183,975       10,766
     Income tax provision:
        Current.......................................         -            -         (2,869)         -
        Deferred (a)..................................     (10,867)        (634)     (70,604)      (1,375)
                                                          --------     --------     --------     --------
     Income from discontinued operations..............   $  18,986    $   3,842    $ 110,502    $   9,391
                                                          ========     ========     ========     ========
<FN>
- -------------
(a)  Represents the noncash  components of discontinued  operations  included in
     the Company's Consolidated  Statements of Cash Flows excluding $37 thousand
     of cash payments for delay rentals included in exploration and abandonments
     for the nine months ended September 30, 2005.
</FN>


NOTE P.     Subsequent Event

     In October  2005,  the Company  closed the sale of the shares in a Gabonese
subsidiary  that owns the interest in the Olowi block to an  unaffiliated  buyer
for  approximately  $48 million of net proceeds.  Pioneer will  recognize a gain
during  the  fourth  quarter  of  2005  of  approximately  $47  million  with no
associated  income tax effect either in Gabon or the United States. In addition,
Pioneer  retains  the  potential,   under  certain  circumstances,   to  receive
additional  payments for  production  from deeper  reservoirs  discovered on the
block.



                                       33




                        PIONEER NATURAL RESOURCES COMPANY


Item 2.     Management's Discussion and Analysis of Financial Condition and
            Results of Operations

Strategic Initiatives

     On September  1, 2005,  the Company  announced  that its board of directors
approved the following  strategic  initiatives to enhance  shareholder value and
returns:

     o    Approval  of a  $1 billion  share  repurchase program, $650 million of
          which was immediately initiated through open market transactions.  The
          $650 million  program is expected to be completed by the end of  2005.
          The  remaining  $350  million is  subject  to the  completion  of  the
          deepwater Gulf of Mexico and Argentine divestments discussed below.
     o    Divestment of  properties in the  deepwater Gulf of  Mexico and Tierra
          del Fuego in southern  Argentina as  a result of high commodity prices
          and an active asset market.
     o    Implementation  of a plan  to exit  exploration in  deepwater  Gulf of
          Mexico. Pioneer has expanded and balanced its exploration portfolio in
          onshore  North  America,  Alaska  and   Africa  and   believes   these
          opportunities  are  now  better  aligned  with the  Company's  current
          exploration objectives.
     o    Reduction  of the  exploration  budget to  between  15  percent and 20
          percent of total capital from 30 percent.
     o    Reallocation of  capital to  North  America  onshore  development  and
          extension drilling.
     o    Hedging  eligible  oil and  gas  production  for  2006 and 2007  using
          costless collars.
     o    Increasing the  semiannual dividend  on common shares by 20 percent to
          $.12 per share.

Financial and Operating Performance

     The Company's financial and operating  performance for the third quarter of
2005 included the following highlights:

     o    Average daily sales  volumes per BOE  decreased one percent during the
          third quarter of 2005 as compared to the third quarter of 2004.
     o    Oil and gas revenues increased  31 percent during the third quarter of
          2005 as compared to the third quarter of 2004 primarily as a result of
          increases in  worldwide  oil  and  Argentine and  North  American  gas
          prices.
     o    Interest and  other income increased  by $8.2 million during the third
          quarter of 2005 as compared  to the third quarter  of 2004,  primarily
          due to $4.8 million of  business interruption insurance claims related
          to the Fain gas plant fire.
     o    Other expense  increased by $35.7 million  during the third quarter of
          2005 as  compared  to the  third  quarter  of 2004,  primarily  due to
          increases of $18.6 million and $12.6 million in losses associated with
          debt extinguishments and commodity hedge ineffectiveness,
          respectively.
     o    Income from  continuing operations before income taxes increased by 47
          percent to $147.1 million during the third quarter of 2005 from $100.0
          million during the third quarter of 2004.
     o    Net income increased  to $123.6  million ($.88  per diluted share) for
          the third quarter of 2005,  as  compared to  $80.9  million  ($.67 per
          diluted share) for the third quarter of 2004.
     o    The Company  recognized income  from discontinued  operations of $19.0
          million  ($.14 per diluted share)  during the  third  quarter  of 2005
          attributable to certain Gulf of  Mexico shelf  properties sold  during
          the third quarter of 2005.
     o    Net cash  provided by  operating activities increased by 33 percent to
          $317.7 million during the  third quarter  of 2005  from $239.1 million
          during the third quarter of 2004.
     o    Outstanding debt  decreased by  $446.7 million,  or 19 percent,  as of
          September 30, 2005 as compared to debt outstanding as of  December 31,
          2004.

Fourth Quarter 2005 Outlook

     Based on current  estimates,  the Company  expects that fourth quarter 2005
production  will  average  160,000 to 175,000  BOEPD.  This range  reflects  the
Company's  expectations  on the  resumption of production  from the Devils Tower
field in  November  and the  typical  variability  in the  timing  of oil  cargo
shipments in South Africa, Argentina and Tunisia.


                                       34




                        PIONEER NATURAL RESOURCES COMPANY



     Fourth quarter production costs (including production and ad valorem taxes)
are  expected  to average  $7.25 to $7.75 per BOE based on current  NYMEX  strip
prices for oil and gas. The  increase  over the prior  quarter is primarily  the
result of increasing  service costs  associated with field operations and higher
commodity prices.  Depreciation,  depletion and amortization ("DD&A") expense is
expected to average $8.75 to $9.25 per BOE.

     Total exploration and abandonment  expense is expected to be $30 million to
$70 million and  includes  plans to drill in Alaska,  the Gulf of Mexico  shelf,
Argentina,  Nigeria and Tunisia as well as the  acquisition  of  additional  3-D
seismic. General and administrative expense is expected to be $31 million to $33
million.  Interest  expense  is  expected  to be $31  million  to  $34  million,
representing  an increase  over the prior  quarter  primarily as a result of the
previously  discussed share repurchase  program.  Accretion of discount on asset
retirement obligations is expected to be $2 million to $3 million.

     The Company's fourth quarter effective income tax rate is expected to range
from 34 percent to 37 percent  based on current  capital  spending  plans.  Cash
income taxes are expected to range from $10 million to $20 million,  principally
related to Argentine, Canadian and Tunisian income taxes and nominal alternative
minimum tax in the United  States.  The Company  continues  to benefit  from the
carryforward  of net operating  losses and other  positive tax attributes in the
United States.

Acquisitions, Divestments, Operations  and Drilling Highlights

     During the first nine months of 2005, the Company  incurred  $957.7 million
in finding and  development  costs  including  $450.1  million  for  development
activities,  $235.2  million for  exploration  activities and $272.4 million for
acquisitions.   The  majority  of  the  Company's  development  and  exploration
expenditures   were  spent  on  drilling  wells,   acquiring  seismic  data  and
constructing  infrastructure associated with successful drilling activities. The
following tables summarize the Company's  development and  exploration/extension
drilling activities for the nine months ended September 30, 2005:


                                                        Development Drilling
                            --------------------------------------------------------------------------
                            Beginning Wells      Wells      Successful    Unsuccessful    Ending Wells
                              in Progress        Spud          Wells          Wells       In Progress
                            ---------------    ---------    ----------    ------------    ------------

                                                                                
United States...............       32             383           403              2             10
Argentina...................        6              56            48              1             13
Canada......................        2              28            26            -                4
                                 ----            ----          ----           ----           ----
    Total Worldwide.........       40             467           477              3             27
                                 ====            ====          ====           ====           ====




                                                  Exploration/Extension Drilling
                            --------------------------------------------------------------------------
                            Beginning Wells      Wells      Successful    Unsuccessful    Ending Wells
                              in Progress        Spud          Wells          Wells       In Progress
                            ---------------    ---------    ----------    ------------    ------------

                                                                                 
United States...............        9              18            15              5              7
Argentina...................        8              23            14              9              8
Canada......................       21              88            43              7             59
Africa......................        4               4             1              3              4
                                 ----            ----          ----           ----           ----
     Total Worldwide........       42             133            73             24             78
                                 ====            ====          ====           ====           ====




                                       35




                        PIONEER NATURAL RESOURCES COMPANY


     The following table summarizes by geographic area the Company's finding and
development costs incurred,  excluding asset retirement obligations,  during the
first nine months of 2005 and the total wells  planned to be drilled  during the
year ending December 31, 2005:



                                   Property
                               Acquisition Costs
                            -----------------------   Exploration   Development                  Wells
                              Proved      Unproved        Costs        Costs        Total       Planned
                            ----------   ----------   -----------   -----------   ----------   ---------
                                                          (in thousands)
                                                                             
United States:
    Gulf of Mexico........  $      -     $   10,669    $  103,066   $   76,402    $  190,137         8
    Onshore Gulf Coast....      21,430       20,691         8,366       32,197        82,684        23
    Permian Basin.........     147,980        1,541         1,010       84,583       235,114       205
    Mid-Continent.........         150          -              33       26,891        27,074        65
    Rocky Mountain........         578       14,931         4,290       97,871       117,670       300
    Alaska................         -         16,375        23,674        3,728        43,777         4
                             ---------    ---------     ---------    ---------     ---------     -----
                               170,138       64,207       140,439      321,672       696,456       605
                             ---------    ---------     ---------    ---------     ---------     -----
Argentina.................           4          357        26,096       64,207        90,664       105
Canada....................       1,528        6,259        25,257       61,093        94,137       200
Nigeria...................         -         29,944        21,860          -          51,804         2
Tunisia...................         -            -          11,903        2,846        14,749         4
Other.....................         -            -           9,624          291         9,915       -
                             ---------    ---------     ---------    ---------     ---------     -----
                                 1,532       36,560        94,740      128,437       261,269       311
                             ---------    ---------     ---------    ---------     ---------     -----
     Total Worldwide......  $  171,670   $  100,767    $  235,179   $  450,109    $  957,725       916
                             =========    =========     =========    =========     =========     =====


     Gulf of Mexico area.  During the third quarter,  the Company  announced its
plans to pursue the  divestment  of its deepwater  Gulf of Mexico  properties to
reduce the exploration risk and production  volatility that have been associated
with these  properties.  No assurance can be given that there will be purchasers
willing to purchase these properties on terms acceptable to the Company.

     During  August 2005,  the Company sold its interests in certain oil and gas
properties on the shelf of the Gulf of Mexico for net proceeds of $58.9 million.
Prior to their  divestiture in August 2005,  the Company's net  production  from
these  properties  averaged  approximately  3,100 BOEPD.  See Note O of Notes to
Consolidated Financial Statements included in "Item 1. Financial Statements" for
additional information regarding the Company's discontinued operations.

     The Company's East Cameron  facilities were destroyed by Hurricane Rita. As
a result,  the  Company  plans to abandon  the East  Cameron  field  because the
pre-hurricane  production  of  approximately  600  BOEPD and  future  production
profile do not justify the cost of replacing the facilities.

     Devils  Tower  production  was  shut-in for the month of  September  due to
damage to third party processing facilities from Hurricane Katrina. Devils Tower
production  is expected to be restarted in early  November,  and  production  is
expected  to return to  pre-hurricane  levels of  approximately  5,000 net BOEPD
shortly after start up. The subsea wells at the Triton and Goldfinger  satellite
fields have been tied back to the Devils  Tower  platform and are ready to flow.
Further  increases in  production  from these subsea wells and Devils Tower well
recompletions  will  occur over the next few months as  additional  repairs  are
completed  on  the  third  party  processing  facilities.   Pioneer's  remaining
operations in the Gulf of Mexico experienced limited disruptions from Hurricanes
Katrina and Rita.  Deepwater  facilities  at Falcon,  Canyon  Express and Devils
Tower had little to no damage.  By  October 1, 2005,  Falcon and Canyon  Express
were fully  operational  and producing at  pre-hurricane  levels.  See Note N of
Notes to  Consolidated  Financial  Statements  included  in  "Item 1.  Financial
Statements" for additional information.

     Subsequent to quarter end, the Company announced a discovery on its Clipper
prospect in the Green Canyon 299 Block in the deepwater Gulf of Mexico.  Pioneer
operates the block with a 55 percent working interest.  The block is included in
Pioneer's deepwater Gulf of Mexico divestment program.



                                       36




                        PIONEER NATURAL RESOURCES COMPANY


     In October  2005,  the  Company  spudded  the first well of its  previously
announced five well shelf program. The first well was a dry hole and will result
in a charge to earnings of  approximately  $2.1 million in the fourth quarter of
2005.

     The Company received a subsalt  suspension of operations  ("SOO") extension
from the Minerals  Management Service related to its subsalt Paladin prospect in
the  Garden  Banks  area  of the  deepwater  Gulf  of  Mexico.  The  Company  is
reprocessing seismic data and is evaluating alternatives to drill an exploratory
well on the prospect during the SOO period.

     In the fourth  quarter of 2005, the Company plans to spud the third well on
its 2004 Thunder  Hawk  discovery  and  complete the drilling of the  previously
spudded second well which was temporarily suspended due to weather.

     During the third  quarter of 2005,  recoverable  reserves  from the Harrier
field were fully produced. The Harrier field had cumulative production of 51 Bcf
on a total investment of $112.0 million.

     The Company was advised by the operator of the Canyon  Express  system that
sidetrack  operations  planned for the  Aconcagua  field later this year will be
postponed pending rig availability. The existing Aconcagua wells are expected to
reach  the end of  their  productive  lives  by the end of 2005 or  early  2006;
therefore,  the Company now anticipates that the system will be shut-in once the
Camden Hills  recoverable  reserves are fully produced  during the first half of
2006 unless a rig becomes available to drill the Aconcagua sidetrack wells.

     Alaska area. The Company  announced  that it acquired a 10 percent  working
interest in the Cosmopolitan Unit, located in the Cook Inlet of Alaska, with the
option to acquire an  additional  40 percent  working  interest and  potentially
assume   operatorship   after  new  3-D  seismic  data  has  been  acquired  and
interpreted. The Company's initial 10 percent interest is being acquired through
its agreement to pay a  disproportionate  share of the 3-D seismic  survey.  The
Company  also has three  exploratory  wells  planned on the North  Slope for the
winter drilling season.

     Mid-Continent  area. The Company's Fain gas plant was shut in due to a fire
on May 15,  2005.  The  Company  completed  repairs and  resumed  operations  in
mid-July 2005. The shut-in resulted in a production loss of approximately 17,000
BOEPD. The Company filed a business  interruption claim relating to the fire and
recognized  an  additional  $4.8 million of  recoveries  in the third quarter of
2005. See Note N of Notes to Consolidated Financial Statements included in "Item
1. Financial Statements" for additional information.

     Permian Basin and Gulf Coast areas. In July 2005, the Company completed the
purchase of approximately 70 million BOE of substantially undeveloped proved oil
reserves in the United  States  core areas of the Permian  Basin and South Texas
for approximately $177 million. The assets acquired were producing approximately
1,800 BOEPD at the date of  acquisition  and provide an estimated  800 undrilled
locations.

     Rocky  Mountain  area.  In the Raton Basin,  production  is increasing as a
result of a pipeline expansion that was completed in October 2005. Pioneer plans
to drill  approximately  100 Raton  wells in the  fourth  quarter  of 2005,  has
drilled  234 Raton  wells  during  the  first  nine  months of 2005 and  expects
production growth from the field of 5 percent to 7 percent during 2005.

     Canada. The Company had its first production, in the third quarter of 2005,
from the wells drilled in the Horseshoe  Canyon  coalbed  methane  project.  The
Company  expects  fourth quarter  Canadian  production to increase as additional
Horseshoe Canyon wells are brought onto production. Pioneer has drilled 90 wells
of the planned  180 well  program  for 2005 in  Horseshoe  Canyon and expects to
complete the balance of the program by the end of the year.  An  additional  180
well program is planned for 2006. Also, the Company plans to drill approximately
50 wells in its Chinchaga field during the 2006 winter drilling season.

     Argentina.  During the third quarter,  the Company announced it will pursue
the sale of its non-operated  position in Tierra del Fuego,  southern Argentina.
No  assurance  can be given that there will be  purchasers  willing to  purchase
these properties on terms acceptable to the Company.


                                       37




                        PIONEER NATURAL RESOURCES COMPANY


     Gabon.  In October  2005,  the  Company  closed the sale of the shares in a
subsidiary  that owns the interest in the Olowi block to an  unaffiliated  buyer
for  approximately  $48 million of net proceeds.  Pioneer will  recognize a gain
during  the  fourth  quarter  of  2005  of  approximately  $47  million  with no
associated  income tax effect either in Gabon or the United States. In addition,
Pioneer  retains  the  potential,   under  certain  circumstances,   to  receive
additional  payments for  production  from deeper  reservoirs  discovered on the
block.

     Nigeria.  A  partially-owned   subsidiary  of  the  Company  joined  Oranto
Petroleum and Orandi  Petroleum in an existing  production  sharing  contract on
Block 320 in  deepwater  Nigeria  gaining  exploration  rights from the Nigerian
National  Petroleum  Corporation.  The  subsidiary,  which  holds  a 51  percent
interest  in Block 320,  is owned 59 percent by the Company and 41 percent by an
unaffiliated  third party.  The Company plans to acquire 3-D seismic data during
the fourth quarter of 2005 and drill the first well in early 2007.

     The Company expects to spud an exploratory well on its  non-operated  Block
256 in late 2005.

     Sao Tome and Principe and Nigeria.  Pioneer was awarded  exploration rights
to acreage in Blocks 2 and 3 in the Joint  Development  Zone between Nigeria and
Sao Tome and Principe  through a consortium with ERHC Energy Inc. The consortium
was awarded 65 percent  interest in Block 2 and a 25 percent interest in Block 3
subject  to  negotiating  acceptable  joint  operating  and  production  sharing
agreements.  The Company is currently negotiating joint operating and production
sharing agreements related to the acreage in Blocks 2 and 3.

     South  Africa.  During the third  quarter of 2005,  the Company and the GTL
plant  operator  announced that they had reached an agreement to develop the gas
and condensate fields discovered  offshore South Africa.  The companies signed a
Memorandum of Understanding  finalizing the terms for jointly developing the gas
fields to provide  feedstock for the GTL plant,  which is located at Mossel Bay.
The  agreement  is  subject to  approval  by the GTL plant  operator's  board of
directors.

     Tunisia - Anaguid.  In the third quarter of 2005,  the project  operator of
the  Company's  Anaguid Block in Tunisia,  along with the Company,  conducted an
extended  production  test  of one of the two  existing  exploration  wells  and
drilled an offset appraisal well to the other  exploration  well. The results of
the extended  production test were  unfavorable and the Company has expensed the
costs  associated  with  this  well in the  third  quarter  of 2005,  which  was
approximately  $5.1 million.  However,  the appraisal well offsetting the second
discovery  encountered  gas and  condensate in a similar  horizon to the initial
well. The Company, along with the operator, is currently reviewing data from the
appraisal well to determine whether development of the area is economical.

Results of Operations

     Oil and gas revenues.  Revenues from oil and gas operations  totaled $558.4
million and $1.6 billion for the three and nine months ended September 30, 2005,
respectively,  as  compared  to $425.6  million  and $1.3  billion  for the same
respective  periods of 2004. The revenue  increase during the three months ended
September  30,  2005,  as compared  to the same period of 2004,  was due to a 22
percent  increase  in oil prices,  a 28 percent  increase in NGL prices and a 39
percent increase in gas prices, including the effects of commodity price hedges,
partially  offset by a one percent  decrease in average daily BOE sales volumes.
The revenue  increase  during the nine  months  ended  September  30,  2005,  as
compared  to the same  period  of 2004,  was due to a two  percent  increase  in
average  daily BOE sales  volumes,  a 20 percent  increase in oil  prices,  a 27
percent  increase  in NGL  prices  and a 25  percent  increase  in  gas  prices,
including the effects of commodity price hedges.



                                       38




                        PIONEER NATURAL RESOURCES COMPANY


     The following  table provides  average daily sales volumes from  continuing
operations, by geographic area and in total, for the three and nine months ended
September 30, 2005 and 2004:


                                           Three months ended         Nine months ended
                                              September 30,             September 30,
                                         ----------------------    ----------------------
                                            2005         2004         2005         2004
                                         ---------    ---------    ---------    ---------
                                                                    
      Oil (Bbls):
        United States.................      24,133       25,930       25,059       23,681
        Argentina.....................       7,930        9,316        7,972        8,827
        Canada........................         209           25          194           27
        Africa........................       9,666        8,733       10,686       10,986
                                         ---------    ---------    ---------    ---------
        Worldwide.....................      41,938       44,004       43,911       43,521
                                         =========    =========    =========    =========
      NGLs (Bbls):
        United States.................      18,176       18,825       16,835       19,790
        Argentina.....................       1,917        1,727        1,814        1,549
        Canada........................         502          381          510          415
                                         ---------    ---------    ---------    ---------
        Worldwide.....................      20,595       20,933       19,159       21,754
                                         =========    =========    =========    =========
      Gas (Mcf):
        United States.................     460,372      472,133      512,834      506,166
        Argentina.....................     142,399      137,971      136,023      119,440
        Canada........................      37,562       22,058       36,160       23,627
                                         ---------    ---------    ---------    ---------
        Worldwide.....................     640,333      632,162      685,017      649,233
                                         =========    =========    =========    =========
      Total (BOE):
        United States.................     119,036      123,444      127,367      127,831
        Argentina.....................      33,581       34,039       32,456       30,283
        Canada........................       6,972        4,082        6,731        4,380
        Africa........................       9,666        8,733       10,686       10,986
                                         ---------    ---------    ---------    ---------
        Worldwide.....................     169,255      170,298      177,240      173,480
                                         =========    =========    =========    =========


     On a quarter-to-quarter  comparison,  average daily sales volumes increased
by 71 percent in Canada and by 11 percent in Africa,  while  average daily sales
volumes  decreased by one percent in Argentina and by four percent in the United
States. On a year-to-date  comparison,  average daily sales volumes increased by
seven  percent in Argentina  and by 54 percent in Canada,  while  average  daily
sales volumes  decreased by three percent in Africa and remained constant in the
United States.

     Average daily sales volumes from continuing operations in the United States
was flat  principally due to new production from the properties  acquired in the
Evergreen  merger,  offset by  declining  production  in the Gulf of Mexico  and
downtime at the Fain gas plant.

     Canadian average daily sales volumes from continuing  operations  increased
due to new production from Canadian  properties acquired in the Evergreen merger
and production from new wells drilled during 2005.

     Argentine  average daily sales  volumes  increased as a result of increased
wells drilled and market demand. The Company has maintained its level of capital
expenditures in Argentina as the stability of the Argentine peso and the general
economic outlook for Argentina has improved and gas prices have increased.

     In Africa,  production  is down in South  Africa  due to normal  production
declines and timing of oil shipments,  partially  offset by continued  growth in
Tunisia production.



                                       39




                        PIONEER NATURAL RESOURCES COMPANY


     The following  table  provides  average  daily sales volumes  recorded from
discontinued  operations  during the three and nine months ended  September  30,
2005 and 2004:


                                           Three months ended         Nine months ended
                                              September 30,             September 30,
                                         ----------------------    ----------------------
                                            2005         2004         2005         2004
                                         ---------    ---------    ---------    ---------
                                                                    
       Oil (Bbls):
          United States...............       1,066        1,850        1,709        2,587
          Canada......................         -             70           38           70
                                         ---------    ---------    ---------    ---------
          Worldwide...................       1,066        1,920        1,747        2,657
                                         =========    =========    =========    =========
       NGLs (Bbls):
          United States...............         131           49           87           80
          Canada......................           2          478          149          525
                                         ---------    ---------    ---------    ---------
          Worldwide...................         133          527          236          605
                                         =========    =========    =========    =========
       Gas (Mcf):
          United States...............       3,447        5,245        5,529        7,407
          Canada......................         347       16,779        8,676       16,418
                                         ---------    ---------    ---------    ---------
          Worldwide...................       3,794       22,024       14,205       23,825
                                         =========    =========    =========    =========
       Total (BOE):
          United States...............       1,771        2,773        2,718        3,902
          Canada......................          60        3,344        1,633        3,331
                                         ---------    ---------    ---------    ---------
          Worldwide...................       1,831        6,117        4,351        7,233
                                         =========    =========    =========    =========




                                       40




                        PIONEER NATURAL RESOURCES COMPANY


     The  following  table  provides  average  reported  prices from  continuing
operations,  including the results of hedging  activities,  and average realized
prices from continuing operations,  excluding the results of hedging activities,
by geographic  area and in total,  for the three and nine months ended September
30, 2005 and 2004:


                                           Three months ended         Nine months ended
                                              September 30,             September 30,
                                         ----------------------    ----------------------
                                            2005         2004         2005         2004
                                         ---------    ---------    ---------    ---------
                                                                    
       Average reported prices:
          Oil (per Bbl):
             United States............   $   32.87    $   30.67    $   30.41    $   29.45
             Argentina................   $   40.59    $   32.25    $   35.62    $   26.96
             Canada...................   $   68.77    $   36.57    $   51.73    $   42.76
             Africa...................   $   59.57    $   42.17    $   51.40    $   35.43
             Worldwide................   $   40.66    $   33.29    $   36.56    $   30.46
          NGLs (per Bbl):
             United States............   $   34.40    $   26.50    $   29.78    $   23.37
             Argentina................   $   31.73    $   29.62    $   31.02    $   28.71
             Canada...................   $   49.93    $   33.68    $   43.22    $   29.42
             Worldwide................   $   34.53    $   26.89    $   30.26    $   23.87
          Gas (per Mcf):
             United States............   $    7.07    $    5.12    $    6.43    $    5.13
             Argentina................   $     .83    $     .63    $     .86    $     .62
             Canada...................   $    7.51    $    4.39    $    6.57    $    4.33
             Worldwide................   $    5.70    $    4.11    $    5.33    $    4.27
       Average realized prices:
          Oil (per Bbl):
             United States............   $   60.63    $   40.96    $   52.45    $   37.74
             Argentina................   $   40.59    $   32.25    $   35.62    $   29.22
             Canada...................   $   68.77    $   36.57    $   51.73    $   42.76
             Africa...................   $   59.57    $   42.94    $   51.40    $   36.06
             Worldwide................   $   56.64    $   39.50    $   49.14    $   35.59
          NGLs (per Bbl):
             United States............   $   34.40    $   26.50    $   29.78    $   23.37
             Argentina................   $   31.73    $   29.62    $   31.02    $   28.71
             Canada...................   $   49.93    $   33.68    $   43.22    $   29.42
             Worldwide................   $   34.53    $   26.89    $   30.26    $   23.87
          Gas (per Mcf):
             United States............   $    8.40    $    5.68    $    7.07    $    5.59
             Argentina................   $     .83    $     .63    $     .86    $     .62
             Canada...................   $    7.82    $    5.00    $    6.68    $    4.99
             Worldwide................   $    6.68    $    4.55    $    5.82    $    4.65


     Hedging  activities.  The oil and gas prices that the  Company  reports are
based on the market price received for the  commodities  adjusted by the results
of the Company's cash flow hedging  activities.  The Company utilizes  commodity
swap and collar  contracts in order to (i) reduce the effect of price volatility
on the  commodities the Company  produces and sells,  (ii) support the Company's
annual capital  budgeting and expenditure plans and (iii) reduce commodity price
risk associated with certain capital projects.  During the three and nine months
ended September 30, 2005, the Company's commodity price hedges decreased oil and
gas revenues from  continuing  operations by $119.3 million and $242.3  million,
respectively,  as compared to $51.0 million and $128.4  million  during the same
respective  periods  in 2004.  See Note G of  Notes  to  Consolidated  Financial
Statements included in "Item 1. Financial  Statements" for specific  information
regarding  the  Company's  hedging  activities  during the three and nine months
ended September 30, 2005 and 2004.




                                       41




                        PIONEER NATURAL RESOURCES COMPANY


     Argentina   commodity   prices.   Argentine   commodity  prices  have  been
significantly  below  those in the world  markets  for a period of time.  In May
2004, pursuant to a decree, the Argentine government approved measures to permit
producers to renegotiate gas sales contracts,  excluding those that could affect
small residential customers. Pursuant to that decree, wellhead prices have risen
from a 2004  year-end  range of $.61 to $.78 per Mcf to a range of $.87 to $1.04
per Mcf, depending on the region where the gas is produced. No further gas price
increases are allowed for in the decree.  Also, due to the Argentine  export tax
(expires in February  2007) and price caps required by the Argentine  government
on oil prices paid by Argentine  refiners,  the price of Argentine  oil has been
below that realized in world markets. For additional  information  regarding the
suppressed  Argentine  commodity  prices see the Company's Annual Report on Form
10-K for the year ended  December 31,  2004.  At the present  time,  no specific
predictions can be made about future commodity prices in Argentina.  The Company
has seen  recent  improvements  in spot oil and gas prices in  certain  areas of
Argentina;  however,  the Company expects Argentine commodity price realizations
to be less than those in the United States.

     Interest and other income. Interest and other income for the three and nine
months  ended   September   30,  2005  was  $9.5  million  and  $85.7   million,
respectively,  as  compared  to $1.2  million  and  $4.6  million  for the  same
respective periods of 2004. The increase in interest and other income during the
three months ended  September  30, 2005, as compared to the same period in 2004,
is  primarily  attributable  to the  recognition  of $4.8  million  of  business
interruption  insurance  claims  related to the Fain plant fire. The increase in
interest and other income  during the nine months ended  September  30, 2005, as
compared  to  the  same  period  in  2004,  is  primarily  attributable  to  the
recognition of $73.6 million in business interruption insurance claims, of which
$59.4  million  relates to  Hurricane  Ivan and $14.2  million to the Fain plant
fire. See Note N of Notes to Consolidated Financial Statements included in "Item
1.  Financial  Statements"  for additional  information  regarding the Company's
business interruption insurance claims.

     Oil and gas production  costs.  The Company  recorded  production  costs of
$118.4  million  and  $330.9  million  during  the three and nine  months  ended
September  30,  2005,  respectively,  as  compared  to $75.1  million and $222.7
million for the same  respective  periods of 2004. In general,  lease  operating
expenses  and  workover  expenses  represent  the  components  of  oil  and  gas
production costs over which the Company has management control, while production
and ad valorem  taxes are directly  related to commodity  price  changes.  Total
production costs per BOE increased by 59 percent and 46 percent during the three
and nine months ended September 30, 2005, respectively,  as compared to the same
respective periods in 2004 primarily due to (i) an increase in production and ad
valorem taxes as a result of higher commodity  prices,  (ii) higher Canadian gas
transportation  fees,  (iii) the  retention  of operating  costs  related to VPP
volumes  sold  (approximately  $.25 and $.18 per BOE,  respectively,  during the
three  and  nine  months  ended  September  30,  2005,  respectively),  (iv) new
production  added from the Evergreen  merger which  reflects  relatively  higher
operating costs and (v) increases in equipment and service costs associated with
rising commodity prices.

     The  following  tables  provide  the  components  of  the  Company's  total
production  costs per BOE from continuing  operations and total production costs
per BOE by geographic  area from  continuing  operations  for the three and nine
months ended September 30, 2005 and 2004:


                                           Three months ended         Nine months ended
                                              September 30,             September 30,
                                         ----------------------    ----------------------
                                            2005         2004         2005         2004
                                         ---------    ---------    ---------    ---------
                                                                    
    Lease operating expenses..........   $    5.58    $    3.57    $    5.04    $    3.44
    Taxes:
       Ad valorem.....................         .63          .50          .61          .49
       Production.....................        1.05          .55          .85          .56
    Workover costs....................         .35          .17          .34          .20
                                          --------     --------     --------     --------
          Total production costs......   $    7.61    $    4.79    $    6.84    $    4.69
                                          ========     ========     ========     ========




                                       42




                        PIONEER NATURAL RESOURCES COMPANY



                                           Three months ended         Nine months ended
                                              September 30,             September 30,
                                         ----------------------    ----------------------
                                            2005         2004         2005         2004
                                         ---------    ---------    ---------    ---------
                                                                    
    Total production costs:
       United States..................   $    8.23    $    5.12    $    7.25    $    4.71
       Argentina......................   $    3.28    $    2.85    $    3.11    $    2.90
       Canada.........................   $   15.23    $   10.02    $   14.90    $   10.35
       Africa.........................   $    9.50    $    5.25    $    8.19    $    6.99
       Worldwide......................   $    7.61    $    4.79    $    6.84    $    4.69


     Depletion,  depreciation and amortization expense. The Company's total DD&A
expense  was  $8.76  and  $8.92  per BOE for the  three  and nine  months  ended
September 30, 2005, respectively,  as compared to $8.65 and $8.54 per BOE during
the same respective periods of 2004. Depletion expense, the largest component of
DD&A expense, was $8.41 and $8.60 per BOE during the three and nine months ended
September  30,  2005,  as  compared  to $8.46 and $8.36 per BOE  during the same
respective  periods in 2004. The changes in per BOE depletion expense during the
three  and nine  months  ended  September  30,  2005,  as  compared  to the same
respective  periods in 2004, are primarily due to lower  production  from higher
cost-basis Gulf of Mexico  production,  offset by relatively higher per BOE cost
basis Rocky  Mountain area  production  acquired in the  Evergreen  merger and a
higher  depletion  rate for the Hugoton and Spraberry  fields as a result of the
VPP  volumes  sold.  Additionally,  the  Company's  depletion  expense  per  BOE
increased  in  Argentina  due to  downward  reserve  revisions  associated  with
negative  well  performance  and  drilling  results  in its deep gas play in the
Neuquen basin,  increased in Tunisia due to the Company's  proved reserves being
reduced as a result of the Company's interest in the Adam block being reduced to
24 percent from 28 percent in accordance  with the terms of the  concession  and
decreased in South Africa as a result of upward reserve  revisions  attributable
to better well performance.

     The following  table  provides  depletion  expense per BOE from  continuing
operations by geographic  area for the three and nine months ended September 30,
2005 and 2004:


                                           Three months ended         Nine months ended
                                              September 30,             September 30,
                                         ----------------------    ----------------------
                                            2005         2004         2005         2004
                                         ---------    ---------    ---------    ---------
                                                                    
     Depletion expense:
        United States.................   $    8.39    $    9.08    $    8.87    $    8.63
        Argentina.....................   $    7.52    $    5.53    $    6.89    $    5.38
        Canada........................   $   14.01    $   12.90    $   12.75    $   12.65
        Africa........................   $    7.64    $    9.13    $    8.03    $   11.78
        Worldwide.....................   $    8.41    $    8.46    $    8.60    $    8.36




                                       43




                        PIONEER NATURAL RESOURCES COMPANY


     Exploration,  abandonments, geological and geophysical costs. The following
table provides the Company's  geological and geophysical costs,  exploratory dry
hole expense, leasehold abandonments and other exploration expense by geographic
area from  continuing  operations for the three and nine months ended  September
30, 2005 and 2004:



                                                                                       Africa
                                                   United                                and
                                                   States     Argentina    Canada       Other      Total
                                                  ---------   ---------   ---------   ---------   --------
                                                                       (in thousands)
                                                                                   
Three months ended September 30, 2005:
    Geological and geophysical..................  $  11,928   $   1,483   $     892   $   3,214   $ 17,517
    Exploratory dry holes.......................        375       4,904         184       4,988     10,451
    Leasehold abandonments and other............     35,691         210         329         -       36,230
                                                   --------    --------    --------    --------    -------
                                                  $  47,994   $   6,597   $   1,405   $   8,202   $ 64,198
                                                   ========    ========    ========    ========    =======
Three months ended September 30, 2004:
    Geological and geophysical..................  $  15,144   $     216   $     783   $   7,220   $ 23,363
    Exploratory dry holes.......................        878       2,664       3,216          85      6,843
    Leasehold abandonments and other............      2,521          18         136           1      2,676
                                                   --------    --------    --------    --------    -------
                                                  $  18,543   $   2,898   $   4,135   $   7,306   $ 32,882
                                                   ========    ========    ========    ========    =======
Nine months ended September 30, 2005:
    Geological and geophysical..................  $  51,285   $   5,608   $   3,756   $  23,073   $ 83,722
    Exploratory dry holes.......................     28,386       5,973       3,413      17,487     55,259
    Leasehold abandonments and other............     40,262       3,450         659         319     44,690
                                                   --------    --------    --------    --------    -------
                                                  $ 119,933   $  15,031   $   7,828   $  40,879   $183,671
                                                   ========    ========    ========    ========    =======
Nine months ended September 30, 2004:
    Geological and geophysical..................  $  40,251   $  10,884   $   2,618   $  12,066   $ 65,819
    Exploratory dry holes.......................     38,741       3,356      11,131      24,404     77,632
    Leasehold abandonments and other............      4,941          55       3,778           8      8,782
                                                   --------    --------    --------    --------    -------
                                                  $  83,933   $  14,295   $  17,527   $  36,478   $152,233
                                                   ========    ========    ========    ========    =======


     Significant  components of the Company's dry hole expense  during the third
quarter of 2005 included $5.1 million on an  unsuccessful  well in the Company's
Anaguid  permit in Tunisia.  Significant  components  of the  Company's dry hole
expense  during the nine months ended  September 30, 2005 included $16.7 million
associated  with an  unsuccessful  well in the  Falcon  Corridor,  $9.5  million
associated with an  unsuccessful  Nigerian well, $3.5 million on an unsuccessful
well on the  Company's El Hamra permit in Tunisia,  the  aforementioned  Anaguid
well and other  various  United  States  exploratory  wells.  The United  States
leasehold  abandonments  and other costs during the three and nine month periods
ended September 30, 2005 include the  aforementioned  $32.8 million  increase in
East Cameron  abandonment  obligations that resulted from hurricane damage.  See
Note N of  Notes  to  Consolidated  Financial  Statements  included  in "Item 1.
Financial  Statements" for additional  information regarding this matter. During
the nine months ended September 30, 2005, the Company completed and evaluated 97
exploration/extension   wells,  73  of  which  were  successfully  completed  as
discoveries.  During the same respective  period in 2004, the Company  completed
and  evaluated 80  exploration/extension  wells,  44 of which were  successfully
completed as discoveries.

     General and administrative expense.  General and administrative expense for
the three and nine months ended  September  30, 2005 was $32.7 million and $91.6
million, respectively, as compared to $19.4 million and $54.8 million during the
same  respective  periods in 2004.  The increases in general and  administrative
expense  are  primarily  due  to  severance   related   charges,   increases  in
administrative  staff,  including staff increases  associated with the Evergreen
merger, and performance-related compensation costs including the amortization of
restricted  stock awarded to officers,  directors and employees during the three
and nine months ended  September  30, 2005,  as compared to the same  respective
periods of 2004.

     Interest expense.  Interest expense was $29.3 million and $92.7 million for
the three and nine months ended September 30, 2005, respectively, as compared to
$24.8 million and $67.8  million for the same  respective  periods in 2004.  The
weighted average interest rates on the Company's  indebtedness for the three and
nine  months  ended  September  30,  2005  were  4.3  percent  and 3.6  percent,
respectively, as compared to 6.0 percent and 5.5 percent for the same respective

                                       44




                        PIONEER NATURAL RESOURCES COMPANY


periods  in 2004,  including  the  effects of  interest  rate  derivatives.  The
increase in interest  expense during the three months ended  September 30, 2005,
as compared to the same period of 2004,  was primarily due to increased  average
borrowings  under the  Company's  lines of credit,  primarily as a result of the
cash portion of the  consideration  paid in the Evergreen merger, a $2.9 million
decrease in the  amortization  of interest rate hedge gains,  the  assumption of
$300  million  of notes in  connection  with the  Evergreen  merger  and  higher
interest rates in 2005. The increase in interest  expense during the nine months
ended  September 30, 2005, as compared to the same period of 2004, was primarily
due to  increased  average  borrowings  under  the  Company's  lines of  credit,
primarily  as a result  of the cash  portion  of the  consideration  paid in the
Evergreen  merger, a $12.9 million decrease in the amortization of interest rate
hedge gains,  the  assumption  of $300 million of notes in  connection  with the
Evergreen merger and higher interest rates in 2005.

     Other  expenses.  Other  expenses  for the  three  and  nine  months  ended
September  30,  2005 were $38.2  million  and $67.5  million,  respectively,  as
compared to $2.5 million and $11.0  million for the same  respective  periods in
2004. The increase in other expenses during the three months ended September 30,
2005,  as compared to the same period of 2004, is primarily  attributable  to an
$18.6 million loss on the redemption of portions of the Company's  senior notes,
a  $12.6  million  increase  in  hedge   ineffectiveness  and  $1.8  million  in
amortization  of noncompete  agreements  issued in connection with the Evergreen
merger.  The increase in other expenses  during the nine months ended  September
30, 2005, as compared to the same period of 2004, is primarily attributable to a
$26.0 million loss on the redemption of portions of the Company's  senior notes,
a $22.3 million  increase in hedge  ineffectiveness,  a $3.4 million increase in
legal and environmental  accruals and $3.4 million in amortization of noncompete
agreements issued in connection with the Evergreen merger.

     Income tax provision.  During the three and nine months ended September 30,
2005, the Company  recognized income tax provisions on continuing  operations of
$42.5 million and $193.7 million, respectively, as compared to $22.9 million and
$113.7 million for the same respective periods in 2004. The Company's  effective
tax rate on continuing  operations  of 28.9 percent and 40.6 percent  during the
three and nine months ended September 30, 2005,  respectively,  differs from the
combined  United States federal and state statutory rate of  approximately  36.5
percent primarily due to:

     o     The  second  quarter  reversal  of  the  $26.9  million  tax  benefit
           recorded  principally in  the third  quarter of  2004 as  a result of
           the  cancellation  of the  development  of the  Olowi  block  and the
           Company's  decision  to exit  Gabon.  The  Company  reversed  the tax
           benefit as a result of signing an agreement in  June 2005 to sell its
           shares in the  subsidiary that  owns the  interest in the Olowi block
           which made it more likely than not that the Company would not realize
           the originally recorded tax benefit.
     o     The Company will recognize a gain of approximately $47 million in the
           fourth quarter of 2005  relating the sale  of shares  in a subsidiary
           that owns the interest in the Olowi Block located in Gabon.  There is
           no associated income tax effect  either in Gabon or the United States
           associated with the gain. In accordance with FIN 18, a portion of the
           beneficial  effect  that  this  tax-free  income  will  have  on  the
           Company's  year-end  effective tax  rate is being  recognized  in the
           third quarter.
     o     Recording of approximately $4.7 million of cash taxes associated with
           the repatriation of foreign earnings pursuant to the AJCA.
     o     Expenses for  unsuccessful well  costs in foreign locations where the
           Company receives no expected income tax benefits.
     o     Foreign tax rates.
     o     Statutes that differ from those in the United States.

     See Note E of Notes to Consolidate  Financial  Statements included in "Item
1.  Financial  Statements"  for additional  information  regarding the Company's
income taxes.

     Discontinued  operations.  During the three and nine months ended September
30, 2005, the Company  recognized income from  discontinued  operations of $19.0
million and $110.5 million,  respectively,  as compared to $3.8 million and $9.4
million for the same  respective  periods of 2004. The amounts for the three and
nine months ended  September 30, 2005 include a gain on disposition of assets of
$27.5 million and $166.1  million,  respectively,  and income tax  provisions of
$10.9 million and $73.5 million, respectively.


                                       45




                        PIONEER NATURAL RESOURCES COMPANY


     The  Company's  high  effective  tax  rate  associated  with   discontinued
operations  during the nine months  ended  September  30, 2005 (40  percent) was
primarily due to:

     o    Approximately  $17.1 million of  United States  deferred tax provision
          triggered  by the  gain  recorded  on the  Canadian  divestiture.  The
          Canadian gain  caused the  recharacterization  of  Argentine  dividend
          income from prior  years that was previously  sheltered by  historical
          Canadian losses.
     o    Cash taxes of $2.9 million associated with the repatriation of foreign
          earnings under the provisions of the AJCA.
     o    A decrease in the Canadian valuation allowance of $12.4 million, which
          partially  offset  the  above  two  items.  The  Canadian  divestiture
          utilized  a substantial  portion of the  Company's Canadian tax pools.
          Consequently,  the Company  has  reassessed  the  likelihood  that the
          remaining Canadian tax attributes will be utilized and has  determined
          it is now more likely than not that it will be able to utilize more of
          its tax pools than previously expected.

     For periods  prior to the  Canadian  divestiture,  the  Company's  Canadian
discontinued  operations  reflect no tax  provisions  due to the Company  having
maintained a valuation  allowance  related to its Canadian  deferred tax assets.
During those prior periods, management's expectation was that it was likely that
the Company would not realize its Canadian  deferred tax assets.  Therefore,  in
accordance with GAAP, portions of the Canadian valuation allowance were released
only to the extent that Canadian income was recorded, thereby offsetting any tax
provisions.  The Company's  effective  tax rate for United  States  discontinued
operations during 2005 and 2004 is approximately 36.5 percent.

Capital Commitments, Capital Resources and Liquidity

     Capital  commitments.   The  Company's  primary  needs  for  cash  are  for
exploration, development and acquisition of oil and gas properties, repayment of
contractual   obligations   and  working   capital   obligations.   Funding  for
exploration, development and acquisition of oil and gas properties and repayment
of   contractual   obligations   may  be   provided   by  any   combination   of
internally-generated  cash flow,  proceeds from the disposition of non-strategic
assets or  alternative  financing  sources as discussed  in "Capital  resources"
below.  Generally,  funding for the Company's  working  capital  obligations  is
provided by internally-generated cash flow.

     Oil and gas properties.  The Company's cash  expenditures  for additions to
oil and gas properties during the three and nine months ended September 30, 2005
totaled $414.2 million and $908.7 million,  respectively,  as compared to $116.9
million and $467.8 million during the same  respective  periods of 2004.  During
the three months ended  September 30, 2005,  the Company's  additions to oil and
gas  properties  were funded by $317.7 million of net cash provided by operating
activities  and  borrowings  on the  Company's  lines of credit,  as compared to
funding from $239.1 million of net cash provided by operating  activities during
the same period of 2004.  During the nine months ended  September 30, 2005,  the
Company's  additions to oil and gas properties  were funded by $985.2 million of
net cash provided by operating activities,  as compared to $757.5 million during
the same period of 2004.

     Contractual  obligations,  including  off-balance  sheet  obligations.  The
Company's  contractual  obligations  include  long-term debt,  operating leases,
drilling  commitments,   derivative  obligations,   other  liabilities  and  VPP
obligations.  From  time-to-time,  the  Company  enters into  off-balance  sheet
arrangements and transactions  that can give rise to material  off-balance sheet
obligations of the Company.  As of September 30, 2005, the material  off-balance
sheet  arrangements and  transactions  that the Company has entered into include
(i) undrawn letters of credit,  (ii) operating lease agreements,  (iii) drilling
commitments, (iv) VPP obligations (to physically deliver volumes and pay related
lease  operating  expenses in the future) and (v)  contractual  obligations  for
which the ultimate  settlement  amounts are not fixed and  determinable  such as
derivative  contracts that are sensitive to future  changes in commodity  prices
and gas  transportation  commitments.  Since  December  31,  2004,  the material
changes in the Company's  contractual  obligations were changes in the Company's
derivative  obligations  and the  aforementioned  sale of  VPPs.  See  "Item  3.
Quantitative  and  Qualitative  Disclosures  About  Market  Risk" for a table of
changes in the fair value of the Company's open derivative contract  liabilities
during the nine months ended September 30, 2005.



                                       46




                        PIONEER NATURAL RESOURCES COMPANY


     Environmental contingency. A subsidiary of the Company has been notified by
a letter  from the TCEQ  dated  August  24,  2005  that the TCEQ  considers  the
subsidiary to be a potentially  responsible party with respect to the Dorchester
Refining  Company State  Superfund Site located in Mount  Pleasant,  Texas.  The
subsidiary,  which was acquired by the Company in 1991, owned a refinery located
at the Mount  Pleasant  site from 1977 until 1984.  According to the TCEQ,  this
refinery  was  responsible  for  releases  of  hazardous   substances  into  the
environment.  The  Company  does not know the nature  and extent of the  alleged
contamination,  the potential costs of remediation,  or the portion,  if any, of
such costs that may be allocable to the Company's subsidiary.  However, based on
the limited information  currently available and assessed regarding this matter,
the Company has no reason to believe that it may have a material  adverse effect
on its future financial condition,  results of operations or liquidity. See Note
J of Notes to Consolidated  Financial  Statements included in "Item 1. Financial
Statements"  for additional  information  regarding this matter as well as other
environmental and legal contingencies involving the Company.

     Capital  resources.  The Company's  primary capital  resources are net cash
provided  by  operating  activities,  proceeds  from  financing  activities  and
proceeds  from sales of  non-strategic  assets.  The Company  expects that these
resources  will be  sufficient  to  fund  its  capital  commitments  during  the
remainder of 2005 and for the foreseeable future.

     VPPs. During January 2005, the Company sold two percent of its total proved
reserves,  or 20.5  MMBOE  of  proved  reserves,  by  means  of two VPPs for net
proceeds  of  $592.3   million,   including  the  assignment  of  the  Company's
obligations under certain  derivative hedge  agreements.  Proceeds from the VPPs
were initially used to reduce outstanding indebtedness.

     During  April  2005,  the  Company  sold less than one percent of its total
proved reserves,  or 7.3 MMBOE of proved  reserves,  by means of another VPP for
net  proceeds of $300.4  million,  including  the  assignment  of the  Company's
obligations  under certain  derivative hedge  agreements.  Proceeds from the VPP
were initially used to reduce outstanding indebtedness.

     See Note M of Notes to Consolidated  Financial Statements included in "Item
1.  Financial  Statements"  for additional  information  regarding the Company's
VPPs.

     Asset  divestitures.  During  April  2005,  the  Company  sold  all  of its
interests in certain East Texas  properties for  approximately  $25.2 million of
net cash proceeds. During May 2005, the Company sold all of its interests in the
Martin Creek,  Conroy Black and Lookout  Butte oil and gas  properties in Canada
for net  proceeds  of $197.5  million,  resulting  in a gain of $138.6  million.
During August 2005, the Company sold all of its interests in certain oil and gas
properties on the shelf of the Gulf of Mexico for net proceeds of $58.9 million,
resulting  in a gain  of  $27.5  million.  The  net  cash  proceeds  from  these
divestitures were used to reduce outstanding indebtedness.

     Operating activities.  Net cash provided by operating activities during the
three and nine months  ended  September  30, 2005 was $317.7  million and $985.2
million,  respectively, as compared to $239.1 million and $757.5 million for the
same respective periods in 2004. The increases in net cash provided by operating
activities were primarily due to higher commodity prices.

     Investing  activities.  Net cash used in  investing  activities  during the
three months ended September 30, 2005 was $364.9 million,  as compared to $975.8
million for the same period in 2004.  Net cash provided by investing  activities
during the nine months ended September 30, 2005 was $240.4 million,  as compared
to net cash used in investing  activities of $1.3 billion for the same period in
2004.  The  decrease in net cash used in investing  activities  during the three
months ended  September  30, 2005,  as compared to the same period of 2004,  was
primarily due to $849.5 million of cash  consideration paid in the third quarter
of 2004 in  connection  with the  Evergreen  merger.  The  increase  in net cash
provided by  investing  activities  during the nine months ended  September  30,
2005,  as compared to the same period of 2004,  was  primarily due to (i) $892.7
million of net  proceeds  received  from VPPs sold during the nine months  ended
September 30, 2005, (ii) the aforementioned  proceeds from asset divestitures of
$281.6 million and (iii) $849.5 million of cash  consideration paid in the third
quarter of 2004 in connection with the Evergreen merger.



                                       47




                        PIONEER NATURAL RESOURCES COMPANY


     Financing activities.  Net cash provided by financing activities during the
three months ended  September 30, 2005 was $52.6 million,  as compared to $723.7
million  during the same period in 2004.  Net cash used in financing  activities
during the nine months ended September 30, 2005 was $1.2 billion, as compared to
net cash  provided by financing  activities  of $566.2  million  during the same
period in 2004.  During the three months ended  September 30, 2005,  the Company
had net  borrowings of long-term debt of $532.7  million,  as compared to $767.0
million during the same period in 2004.  During the nine months ended  September
30, 2005, the Company had net repayments of long-term debt of $464.5 million, as
compared to net  borrowings of long-term  debt of $631.0 million during the same
period in 2004.

     During  February  2005,  the  Company's  board  of  directors   declared  a
semiannual  dividend  of $.10 per common  share,  payable  on April 15,  2005 to
shareholders of record on March 31, 2005. Associated therewith, the Company paid
$14.3 million of aggregate  dividends during April 2005.  During September 2005,
the  Company's  board of directors  declared a  semiannual  dividend of $.12 per
common share, payable on October 14, 2005 to shareholders of record on September
30, 2005.  Associated  therewith,  the Company  paid $16.8  million of aggregate
dividends  during  October 2005.  Future  dividends are at the discretion of the
Company's board of directors,  and the board of directors may change the current
dividend  amount in the future if  warranted  by future  liquidity  and  capital
resource attributes.

     During April 2005,  $131.0 million of the Company's 8-7/8% senior notes due
2005 matured and were repaid.  The Company also redeemed $19.0 million and $51.4
million  principal  amount of its 9-5/8%  Notes during the three and nine months
ended  September 30, 2005,  respectively.  During  September  2005,  the Company
accepted  tenders to purchase  $188.4 million in principal  amount of the 5.875%
Notes for  $199.9  million.  During  October  2005,  the  Company  redeemed  the
remaining $12.6 million and $16.2 million,  respectively, of aggregate principal
amount outstanding of the 9-5/8% Notes and its 7.50% Notes. The Company utilized
unused  borrowing  capacity  under its lines of credit to fund  these  financing
activities.

     During August 2005, the Company's  board of directors  approved a new share
repurchase program authorizing the purchase of up to $1 billion of the Company's
common  stock,  $650  million of which was  immediately  initiated  through open
market transactions. The $650 million program is expected to be completed by the
end of 2005.  The  remaining  $350 million is subject to the  completion  of the
deepwater  Gulf of Mexico and Argentine  divestments.  During the three and nine
months ended September 30, 2005, the Company  expended $453.0 million to acquire
9.0 million  shares of treasury stock and $690.3 million to acquire 14.9 million
shares of treasury  stock,  respectively.  As of September 30, 2005, the Company
had  expended  $391 million  towards the $650 million  portion of the $1 billion
repurchase  program and through  October  31,  2005 spent an  additional  $250.0
million  pursuant to a repurchase plan adopted by the Company  conforming to the
requirements  of Rule  10b5-1  of the  Securities  Exchange  Act of  1934  ("the
Exchange Act"). The Company expects to complete the additional $9 million of the
$650 million portion of the repurchase program by the end of 2005.

     During  September  2005,  the  Company  entered  into  the  Amended  Credit
Agreement that provides for initial  aggregate loan commitments of $1.5 billion.
In connection with the funding of the Amended Credit  Agreement on September 30,
2005, all amounts  outstanding  under the 364-Day Credit  Agreement were retired
and the 364-Day Credit Agreement terminated.

     As the Company  pursues its  strategy,  it may  utilize  various  financing
sources,  including  fixed  and  floating  rate  debt,  convertible  securities,
preferred  stock or common  stock.  The  Company  may also issue  securities  in
exchange for oil and gas  properties,  stock or other interests in other oil and
gas  companies  or  related  assets.  Additional  securities  may be of a  class
preferred  to common  stock  with  respect  to such  matters  as  dividends  and
liquidation  rights and may also have other rights and preferences as determined
by the Company's board of directors.

     Liquidity.  The Company's  principal source of short-term  liquidity is the
Amended Credit  Agreement.  There were $755.0 million of outstanding  borrowings
under the Amended  Credit  Agreement as of September 30, 2005.  Including  $35.3
million of undrawn and  outstanding  letters of credit under the Amended  Credit
Agreement,  the Company had $709.7  million of unused  borrowing  capacity as of
September 30, 2005.



                                       48




                        PIONEER NATURAL RESOURCES COMPANY


     The  Company's  debt will  increase as a result of the announced $1 billion
stock repurchase program.  Including the expected completion of the $650 million
portion of the $1 billion stock repurchase program, the Company anticipates that
its debt to book  capitalization will be less than 50 percent at the end of 2005
and will decline to below 35 percent by the end of 2006,  before considering the
effects of any divestitures.

     Debt  ratings.  The  Company  receives  debt  credit  ratings  from S&P and
Moody's,  which are subject to regular  reviews.  Subsequent to quarter end, S&P
cut the  Company's  corporate  credit  rating to BB+ with a stable  outlook from
BBB-.  Moody's continues to hold the Company's  corporate credit rating at Baa3,
which is an investment-grade  rating,  with a negative outlook.  S&P and Moody's
consider many factors in determining the Company's ratings including: production
growth opportunities,  liquidity,  debt levels and asset and reserve mix. If the
Company were also to be  downgraded by Moody's,  it would  increase the interest
rate and fees the Company pays on the Amended Credit Agreement and would trigger
additional debt covenant  requirements  under the Amended Credit Agreement.  The
individual  downgrade by S&P is not expected to materially  affect the Company's
financial  position  or  liquidity  but could  negatively  impact the  Company's
ability to obtain additional  financing or the interest rate and fees associated
with such additional financing.

     Book capitalization and current ratio. The Company's book capitalization at
September  30, 2005 was $4.1  billion,  consisting  of debt of $1.9  billion and
stockholders' equity of $2.1 billion.  Consequently,  the Company's debt to book
capitalization  increased to 48 percent at September 30, 2005 from 46 percent at
December 31, 2004. The Company's ratio of current assets to current  liabilities
was .57 to 1.00 at September 30, 2005 as compared to .72 to 1.00 at December 31,
2004.  The  decline  in  the  Company's  ratio  of  current  assets  to  current
liabilities was primarily due to increases in its current derivative liabilities
as a result of higher  commodity prices and current deferred revenue as a result
of the VPPs.

Item 3.     Quantitative and Qualitative Disclosures About Market Risk

     The following  quantitative and qualitative  disclosures  about market risk
are  supplementary to the quantitative and qualitative  disclosures  provided in
the Company's  Annual Report on Form 10-K for the year ended  December 31, 2004.
As such, the information contained herein should be read in conjunction with the
related  disclosures  in the  Company's  Annual Report on Form 10-K for the year
ended December 31, 2004.

     Although certain derivative contracts to which the Company has been a party
did not qualify as hedges,  the Company does not enter into  derivative or other
financial instruments for trading purposes.

     The following table reconciles the changes that occurred in the fair values
of the Company's open derivative contracts during the first nine months of 2005:


                                                 Derivative Contract Net Liabilities
                                                 -----------------------------------
                                                                            Foreign
                                                                Interest    Exchange
                                                 Commodities      Rate        Rate         Total
                                                 -----------    --------    --------    -----------
                                                            (in thousands)
                                                                            
    Fair value of contracts outstanding
       as of December 31, 2004...............    $  (406,546)   $    -      $   -       $  (406,546)
    Changes in contract fair value (a).......     (1,002,493)     (4,614)        18      (1,007,089)
    Contract maturities......................        282,953         -          (18)        282,935
    Contract terminations....................         33,403       4,614        -            38,017
                                                  ----------     -------     ------      ----------
    Fair value of contracts outstanding
       as of September 30, 2005..............    $(1,092,683)   $    -      $   -       $(1,092,683)
                                                  ==========     =======     ======      ==========
<FN>
- ---------------
(a)  At inception,  new derivative contracts entered into by the Company have no
     intrinsic value.
</FN>


     Foreign  exchange  rate  sensitivity.  From  time to  time,  the  Company's
Canadian  subsidiary  enters into  short-term  forward  currency  agreements  to
purchase Canadian dollars with U.S. dollar gas sales proceeds.  The Company does
not designate these derivatives as hedges due to their short-term nature.  There
were no  outstanding  forward  currency  agreements  at  September  30,  2005 or
December 31, 2004.

                                       49




                        PIONEER NATURAL RESOURCES COMPANY



     Interest rate sensitivity.  The following table provides  information about
other financial instruments to which the Company was a party as of September 30,
2005 and that are sensitive to changes in interest rates. For debt  obligations,
the table presents  maturities by maturity dates,  the weighted average interest
rates expected to be paid on the debt given current contractual terms and market
conditions  and the debt's  estimated  fair  value.  For fixed  rate  debt,  the
weighted average  interest rate represents the contractual  fixed rates that the
Company was obligated to periodically  pay on the debt as of September 30, 2005.
For variable rate debt, the average  interest rate  represents the average rates
being paid on the debt  projected  forward  proportionate  to the forward  yield
curve for LIBOR on November 7, 2005. As of September  30, 2005,  the Company was
not a party to  material  derivatives  that would  subject it to  interest  rate
sensitivity.

                            Interest Rate Sensitivity
                    Debt Obligations as of September 30, 2005




                                   Three months                                                                         Liability
                                     ending,                    Year ending December 31,                                Fair Value
                                   December 31,  ------------------------------------------------------                September 30,
                                       2005        2006       2007       2008       2009     Thereafter      Total         2005
                                   -----------   --------   --------   --------   --------   ----------   ----------   ------------
                                                                     (in thousands, except interest rates)
                                                                                               
Total Debt:
  Fixed rate principal
   maturities (a)................   $    -       $    -     $ 32,075   $350,000   $    -      $ 911,794   $1,293,869    $1,441,766
     Weighted average
      interest rate (%)..........       6.31         6.31       6.29       6.16       6.16         6.16
  Variable rate maturities.......   $    -       $    -     $    -     $    -     $    -      $ 755,000   $  755,000    $  755,000
     Average interest rate (%)...       4.63         4.95       4.99       5.09       5.18        5.25
<FN>
- ----------
(a)  Represents  maturities  of principal  amounts  excluding  (i) debt issuance
     discounts and premiums and (ii) deferred fair value hedge gains and losses.
     During October 2005 the Company redeemed $16.2 million  principal amount of
     7.50%  Notes and $12.6  million  principal  amount of 9-5/8%  Notes,  which
     amounts are included in "Thereafter" maturities in this table.
</FN>


     Commodity price sensitivity. The following tables provide information about
the Company's oil and gas derivative  financial  instruments that were sensitive
to changes in oil or gas prices as of September  30, 2005.  As of September  30,
2005,  all of  the  Company's  oil  and  gas  derivative  financial  instruments
qualified as hedges.

     See Note G of Notes to Consolidated  Financial Statements included in "Item
1. Financial  Statements" for  information  regarding the terms of the Company's
derivative  financial  instruments  that are  sensitive to changes in oil or gas
prices.
                              Oil Price Sensitivity
            Derivative Financial Instruments as of September 30, 2005




                                               Three months                                     Liability
                                                  ending        Year ending December 31,      Fair Value at
                                               December 31,  ------------------------------   September 30,
                                                   2005        2006       2007       2008          2005
                                               -----------   --------   --------   --------   -------------
                                                                                              (in thousands)
                                                                               
Oil Hedge Derivatives:
  Average daily notional Bbl volumes (a):
   Swap contracts...........................      27,000       10,000     13,000    17,000      $ 552,190
    Weighted average fixed price per Bbl....    $  27.97     $  31.69   $  30.89   $ 29.21
   Collar contracts.........................         -          9,129      4,500       -        $  27,643
    Weighted average ceiling price per Bbl..    $    -       $  74.92   $  90.43   $   -
    Weighted average floor price per Bbl....    $    -       $  44.25   $  50.00   $   -
  Average forward NYMEX oil prices (b)......    $  59.40     $  61.38   $  60.55   $ 59.02
<FN>
- ---------------
(a)  See Note G of Notes to Consolidated  Financial Statements included in "Item
     1. Financial  Statements" for hedge volumes and weighted  average prices by
     calendar quarter.
(b)  The average  forward  NYMEX oil prices are based on November 7, 2005 market
     quotes.
</FN>


                                       50




                        PIONEER NATURAL RESOURCES COMPANY



                              Gas Price Sensitivity
            Derivative Financial Instruments as of September 30, 2005



                                               Three months                                     Liability
                                                  ending        Year ending December 31,      Fair Value at
                                               December 31,  ------------------------------   September 30,
                                                   2005        2006       2007       2008          2005
                                               -----------   --------   --------   --------   -------------
                                                                                              (in thousands)
                                                                               
Gas Hedge Derivatives (a):
  Average daily notional MMBtu volumes (b):
   Swap contracts.............................    253,535      73,842     29,195      5,000      $ 414,081
    Weighted average fixed price per MMBtu....  $    5.17    $   4.30   $   4.28   $   5.38
   Collar contracts...........................        -       183,685    215,000        -        $  98,769
    Weighted average ceiling price per MMBtu..  $     -      $  13.76   $  11.84   $    -
    Weighted average floor price per MMBtu....  $     -      $   6.62   $   6.57   $    -
  Average forward NYMEX gas prices (c)........  $   11.78    $  10.70   $   9.39   $   8.33
<FN>
- ---------------
(a)  To minimize  basis risk,  the Company enters into basis swaps for a portion
     of its gas hedges to connect the index price of the hedging instrument from
     a NYMEX index to an index which reflects the geographic area of production.
     The Company  considers these basis swaps as part of the associated swap and
     collar contracts and, accordingly, the effects of the basis swaps have been
     presented together with the associated contracts.
(b)  See Note G of Notes to Consolidated  Financial Statements included in "Item
     1. Financial  Statements" for hedge volumes and weighted  average prices by
     calendar quarter.
(c)  The average  forward  NYMEX gas prices are based on November 7, 2005 market
     quotes.
</FN>


Item 4.     Controls and Procedures

     Evaluation of disclosure controls and procedures. The Company's management,
with  the  participation  of  its  principal  executive  officer  and  principal
financial  officer,  have  evaluated,  as required by Rule  13a-15(b)  under the
Exchange Act, the Company's  disclosure  controls and  procedures (as defined in
Exchange  Act  Rule  13a-15(e))  as of the  end of the  period  covered  by this
quarterly report on Form 10-Q. Based on that evaluation, the principal executive
officer and principal  financial officer concluded that the design and operation
of the Company's  disclosure  controls and  procedures are effective in ensuring
that information  required to be disclosed by the Company in the reports that it
files or submits under the Exchange Act is recorded,  processed,  summarized and
reported within the time periods specified in the SEC's rules and forms.

     Changes in internal  control over financial  reporting.  There have been no
changes in the Company's  internal control over financial  reporting (as defined
in Rule  13a-15(f)  under the Exchange Act) that  occurred  during the Company's
last fiscal quarter that have  materially  affected or are reasonably  likely to
materially affect the Company's internal control over financial reporting.

                           PART II. OTHER INFORMATION

Item 1.     Legal Proceedings

     The  Company is party to various  legal  proceedings,  which are  described
under "Legal  actions" in Note J of Notes to Consolidated  Financial  Statements
included in "Item 1. Financial  Statements".  The Company is also party to other
litigation  incidental  to its business.  The Company  believes that the damages
from such  other  legal  actions  will not be in excess  of ten  percent  of the
Company's current assets.



                                       51




                        PIONEER NATURAL RESOURCES COMPANY


Item 2.     Unregistered Sales of Equity Securities and Use of Proceeds

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

     The following  table  summarizes the Company's  purchases of treasury stock
during the three months ended September 30, 2005:



                                                             Total Number of Shares    Approximate Dollar
                                                              (or Units) Purchased      Amount of Shares
                        Total Number of     Average Price      as Part of Publicly      that May Yet Be
                        Shares (or Units)   Paid per Share       Announced Plans        Purchased under
      Period              Purchased (a)       (or Unit)            or Programs        Plans or Programs (b)
      ------            -----------------   --------------   ----------------------   ---------------------

                                                                             
July 2005.............             -           $    -                    -
August 2005...........       1,669,933         $  41.38            1,513,300
September 2005........       7,512,226         $  52.03            7,509,700
                           -----------                            ----------
        Total.........       9,182,159         $  50.09            9,023,000             $ 259,286,843
                           ===========                            ==========              ============
<FN>
- -----------
(a)  Amounts include shares withheld to fund tax withholding on employees' stock
     awards for which restrictions have lapsed.
(b)  Excludes the remaining  $350 million plan to repurchase  shares  subject to
     the  successful  completion of the  deepwater  Gulf of Mexico and Argentine
     divestments.  Subsequent  to September 30, 2005,  the Company  purchased an
     additional $250.0 million of stock pursuant to a repurchase plan adopted by
     the Company  conforming to the  requirements of Rule 10b5-1 of the Exchange
     Act.
</FN>


     During August 2005, the Company's  board of directors  approved a new share
repurchase program authorizing the purchase of up to $1 billion of the Company's
common  stock,  $650  million of which was  immediately  initiated  through open
market transactions. The $650 million program is expected to be completed by the
end of 2005.  The  remaining  $350 million is subject to the  completion  of the
deepwater Gulf of Mexico and Argentine divestments.



                                       52






                        PIONEER NATURAL RESOURCES COMPANY


Item 6.       Exhibits

Exhibits

     4.1   Fifth Supplemental Indenture, dated as of September 16,  2005,  among
           the Company,  Pioneer Natural Resources USA, Inc.,  as Guarantor, and
           Wachovia Bank,  National Association, as Trustee, with respect to the
           Company's indenture,  dated as of March 10, 2004, between the Company
           and Wachovia Bank,  National Association, as Trustee (incorporated by
           reference to Exhibit 4.1 to the Company's Current Report on Form 8-K,
           File No. 1-13245, filed with the SEC on September 21, 2005).
   10.1    Indemnification Agreement  dated August 16, 2005, between the Company
           and Scott D. Sheffield,  together with a schedule  identifying  other
           substantially  identical agreements between the  Company and  each of
           its directors  and executive  officers  identified  on  the  schedule
           (incorporated by reference to Exhibit 10.1 to the  Company's  Current
           Report on Form 8-K,  File No.  1-13245,  filed with the SEC on August
           17, 2005).
   10.2    Severance Agreement  dated August 16,  2005,  between the Company and
           Scott  D.  Sheffield,  together  with a  schedule  identifying  other
           substantially  identical agreements  between the  Company and each of
           its executive officers identified on the schedule and identifying the
           material differences  between each of  those agreements and the filed
           Severance Agreement (incorporated by reference to Exhibit 10.2 to the
           Company's  Current Report on Form 8-K,  File No. 1-13245,  filed with
           the SEC on August 17, 2005).
   10.3    Change in  Control Agreement,  dated  August  16,  2005,  between the
           Company and Scott D. Sheffield,  together with a schedule identifying
           other substantially identical agreements between the Company and each
           of its executive officers  identified on the schedule and identifying
           the material  differences between  each of  those  agreements and the
           filed  Change  in  Control  Agreement  (incorporated by  reference to
           Exhibit  10.3  to the  Company's Current Report on Form 8-K, File No.
           1-13245, filed with the SEC on August 17, 2005).
   10.4    Amended and Restated  5-Year  Revolving Credit  Agreement dated as of
           September 30, 2005 among  the Company,  as Borrower,  JPMorgan  Chase
           Bank,  N.A.  as  Administrative   Agent  and  certain  other  lenders
           (incorporated by reference to  Exhibit 99.1  to the Company's Current
           Report on  Form 8-K,  File No. 1-13245, filed with the SEC on October
           4, 2005).
   31.1    Chief Executive Officer certification  under Section 302 of Sarbanes-
           Oxley Act of 2002.
   31.2    Chief Financial  Officer certification under Section 302 of Sarbanes-
           Oxley  Act of 2002.
   32.1    Chief Executive Officer certification under Section 906 of  Sarbanes-
           Oxley Act of 2002.
   32.2    Chief Financial Officer  certification under Section 906 of Sarbanes-
           Oxley Act of 2002.


                                       53




                        PIONEER NATURAL RESOURCES COMPANY



                                   SIGNATURES

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 hereto duly authorized.


                                      PIONEER NATURAL RESOURCES COMPANY



Date:  November 8, 2005            By: /s/ Richard P. Dealy
                                      --------------------------
                                      Richard P. Dealy
                                      Executive Vice President
                                      and Chief Financial Officer



Date:  November 8, 2005            By:  /s/ Darin G. Holderness
                                       --------------------------
                                       Darin G. Holderness
                                       Vice President and Chief
                                       Accounting Officer


                                       54




                        PIONEER NATURAL RESOURCES COMPANY


Exhibit Index

 4.1     Fifth Supplemental Indenture, dated as of September 16, 2005, among the
         Company,  Pioneer  Natural  Resources  USA,  Inc.,  as  Guarantor,  and
         Wachovia Bank,  National Association,  as Trustee,  with respect to the
         Company's indenture,  dated as of  March 10, 2004, between  the Company
         and Wachovia  Bank, National Association,  as Trustee  (incorporated by
         reference to Exhibit 4.1  to the  Company's Current Report on Form 8-K,
         File No. 1-13245, filed with the SEC on September 21, 2005).
10.1     Indemnification  Agreement  dated August 16, 2005,  between the Company
         and Scott D. Sheffield,   together with a  schedule  identifying  other
         substantially identical agreements between  the Company and each of its
         directors   and   executive  officers    identified   on  the  schedule
         (incorporated  by reference to Exhibit 10.1  to the Company's   Current
         Report on Form 8-K, File No. 1-13245,  filed with the SEC on August 17,
         2005).
10.2     Severance Agreement  dated  August 16,  2005,  between the  Company and
         Scott D.  Sheffield,   together  with  a  schedule   identifying  other
         substantially identical agreements between the Company and  each of its
         executive  officers  identified  on the  schedule and  identifying  the
         material  differences  between each  of those  agreements and the filed
         Severance Agreement  (incorporated by reference to  Exhibit 10.2 to the
         Company's Current Report on  Form 8-K, File No. 1-13245, filed with the
         SEC on August 17,  2005).
10.3     Change in Control Agreement, dated August 16, 2005, between the Company
         and Scott D. Sheffield,  together with  a  schedule  identifying  other
         substantially identical  agreements between the Company and each of its
         executive  officers  identified  on the schedule  and  identifying  the
         material differences  between  each  of  those agreements and the filed
         Change in Control Agreement  (incorporated by reference to Exhibit 10.3
         to the Company's Current Report on  Form 8-K,  File No. 1-13245,  filed
         with the SEC on August  17,  2005).
10.4     Amended  and  Restated  5-Year Revolving  Credit Agreement  dated as of
         September 30, 2005 among the Company, as Borrower, JPMorgan Chase Bank,
         N.A. as  Administrative  Agent and certain other lenders  (incorporated
         by reference to Exhibit 99.1 to the  Company's  Current Report  on Form
         8-K,  File No.  1-13245,  filed with the SEC on October 4,  2005).
31.1(a)  Chief Executive  Officer certification  under Section  302 of Sarbanes-
         Oxley Act of 2002.
31.2(a)  Chief  Financial Officer  certification under Section 302  of Sarbanes-
         Oxley Act of 2002.
32.1(b)  Chief Executive  Officer certification under  Section  906 of Sarbanes-
         Oxley Act of 2002.
32.2(b)  Chief Financial  Officer certification  under Section 906 of  Sarbanes-
         Oxley Act of 2002.

- ----------------------
(a) Filed herewith.
(b) Furnished herewith.


                                       55