EXHIBIT 99.1


                                  NEWS RELEASE

                                                               Company Contacts:
                                       Investors: Frank Hopkins or Chris Paulsen
                                      Media and Public Affairs:   Susan Spratlen
                                                                  (972) 444-9001

                   Pioneer Reports Third Quarter 2005 Results

Dallas,  Texas, November 3, 2005 -- Pioneer Natural Resources Company (NYSE:PXD)
today announced  financial and operating results for the quarter ended September
30, 2005.

Pioneer reported net income for the quarter of $124 million, or $.88 per diluted
share,  an  increase of 53% over net income for the same period last year of $81
million, or $.67 per diluted share.  Income from continuing  operations was $105
million,  or  $.74  per  diluted  share,  compared  to  income  from  continuing
operations  of $77 million,  or $.64 per diluted  share,  for the same period in
2004.

Pioneer's  net income for the quarter  included  discontinued  operations of $30
million ($19 million  after-tax)  related to the  divestiture of its interest in
non-core  assets on the Gulf of Mexico  shelf.  Net income  also  included a $33
million  pre-tax  charge  ($21  million  after-tax)  related to the  incremental
abandonment  obligation  for the East  Cameron  322 field  which was lost during
Hurricane Rita. Insurance is expected to cover this cost as well as the value of
the platform and lost  revenues.  Insurance  recoveries  will be  recognized  as
income in future quarters as the amount of the recoveries becomes known.

Cash flow from operations for the third quarter was $318 million, an increase of
33%  compared  to $239  million  for the same  period in 2004.  The  increase in
operating  cash flow is  attributable  to higher prices for oil, gas and natural
gas liquids partially offset by cost increases.

Scott D. Sheffield,  Chairman and CEO, stated, "We had a strong quarter and have
made significant progress in executing the strategic initiatives we announced in
September. We completed most of the first phase of our share repurchase program,
repurchased $217 million of bonds and increased our semiannual  dividend by 20%.
In  October,  we opened  data rooms  covering  the assets we have  targeted  for
divestiture  in the  deepwater  Gulf of Mexico and Tierra del Fuego in  southern
Argentina.  Our increased  2005 drilling  programs are on track,  and we've made
significant  progress  towards  sanctioning a project to  commercialize  our gas
reserves offshore South Africa."

During  2005,  Pioneer has  repurchased  19.8 million  shares for $941  million,
including $641 million of the $650 million share repurchase program announced on
September  1 for  execution  during  2005.  A $300  million  repurchase  program
concluded earlier in the year.

Third quarter oil and gas sales averaged  169,255 barrels oil equivalent per day
(BOEPD),  excluding  1,831 BOEPD  associated with fields sold during the quarter
that are reflected in discontinued operations.  Third quarter oil sales averaged
41,938 barrels per day (BPD) and natural gas liquids sales averaged  20,595 BPD.
Gas sales in the third quarter averaged 640 million cubic feet per day (MMcfpd).
Third quarter  prices for oil and natural gas liquids were $40.66 and $34.53 per
barrel,  respectively.  The worldwide price for gas was $5.70 per thousand cubic
feet (Mcf) and includes $.37 per Mcf associated with the VPP transactions. North
American gas prices  averaged  $7.10 per Mcf,  including $.48 per Mcf associated
with the VPP transactions.

Third  quarter  production  costs  averaged  $7.61 per barrel of oil  equivalent
(BOE).  The increase in third quarter lease  operating  costs is attributable to
increases in commodity prices resulting in higher production taxes, decreases in
deepwater Gulf of Mexico  production which has lower per BOE operating costs and
price  increases  in  services  and  supplies   related  to  field   operations.
Exploration and abandonment costs were  $64 million for the quarter and included






$11 million of dry hole and abandonments  associated primarily with unsuccessful
wells in Argentina and Tunisia,  $33 million of incremental  abandonment charges
associated with the aforementioned  East Cameron 322 field which was lost during
Hurricane  Rita,  $17 million of geologic  and  geophysical  expenses  including
seismic costs and $3 million of delay rentals and unproved acreage abandonments.
General and administrative costs for the quarter were $33 million.

For the same quarter last year, adjusted to exclude discontinued operations from
asset sales, Pioneer reported oil and gas sales of 170,298 BOEPD,  including oil
sales of 44,004 BPD,  natural  gas liquids  sales of 20,933 BPD and gas sales of
632 MMcfpd. Prices for third quarter 2004 were $33.29 per barrel for oil, $26.89
per barrel for natural gas liquids and $4.11 per Mcf for gas. North American gas
prices averaged $5.08 per Mcf.

Operations Update

During the third quarter,  Pioneer  continued the aggressive pace of development
set earlier in the year.  Currently,  the Company has 18 onshore rigs running in
the U.S., five in Argentina, five in Canada and one in Tunisia.

As  discussed  above,  Pioneer's  East  Cameron 322  platform  was  destroyed by
Hurricane Rita.  Pioneer plans to abandon the East Cameron 322 field because the
pre-hurricane  production  of  approximately  600  BOEPD and  future  production
profile  do not  justify  the  cost of  replacing  the  platform.  Devils  Tower
production is in the process of being  restarted,  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 Chevron's Empire Terminal.  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.

In the Raton Basin, production is increasing as a result of a pipeline expansion
that was completed in October.  Pioneer  drilled 36 Raton wells during  October,
234 wells year-to-date, and expects production growth from the field of 5% to 7%
during 2005.

In Canada,  Pioneer has drilled 90 wells of a 180 well program in the  Horseshoe
Canyon coal bed methane  play and expects to complete the balance of the program
by the end of the year. An additional 180 well program is planned for 2006.

In South Africa,  Pioneer and PetroSA have signed a Memorandum of  Understanding
finalizing  the terms for jointly  developing  South Coast gas fields to provide
feedstock  for PetroSA's  onshore  gas-to-liquids  plant at Mossel Bay.  Pioneer
holds a 45%  interest  in the gas  development  project  and expects to initiate
production from the project during the first half of 2007.

In October,  the Company  announced a discovery  on its Clipper  prospect in the
deepwater Gulf of Mexico. This discovery will be included in Pioneer's deepwater
Gulf of Mexico divestment program. Data rooms related to this divestment and the
Tierra del Fuego  properties in Argentina  have been opened.  Randall & Dewey is
advising  Pioneer  on the  Gulf of  Mexico  sale,  and  Scotia  Waterous/Toronto
Dominion is supporting the Argentine sale. The bids related to both  divestiture
packages are due in December.

Financial Outlook

The following  statements  are estimates  based on current  expectations.  These
forward-looking  statements  are subject to a number of risks and  uncertainties
which may cause the  Company's  actual  results  to differ  materially  from the
following  statements.  The last paragraph of this release  addresses certain of
the risks and uncertainties to which the Company is subject.

Fourth quarter 2005  production is expected to average 160,000 to 175,000 BOEPD.
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. Depreciation, depletion and amortization 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 wells 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,  and
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% to 37% 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 U.S. The Company  continues to benefit from the  carryforward  of net
operating losses and other positive tax attributes in the U.S.

The  Company's  financial  results  and oil and gas hedges are  outlined  on the
attached schedules.

Earnings Conference Call

This  morning at 10:00 a.m.  Eastern,  Pioneer  will  discuss its third  quarter
financial and operating results with an accompanying presentation. The call will
be webcast on Pioneer's  website,  www.pioneernrc.com.  At the  website,  select
'INVESTOR'  at the top of the  page.  For those  who  cannot  listen to the live
broadcast,  a replay will be available shortly after the call. Or you may choose
to dial (800)  967-7134  (confirmation  code:  1274638) to listen to the call by
telephone and view the accompanying  visual presentation at the website above. A
telephone replay will be available by dialing (888) 203-1112 (confirmation code:
1274638).

Pioneer is a large  independent oil and gas exploration and production  company,
headquartered in Dallas, with operations in the United States, Argentina, Canada
and Africa. For more information, visit Pioneer's website at www.pioneernrc.com.

Except for historical  information contained herein, the statements in this News
Release are 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 are subject to a number
of risks and  uncertainties  which may cause Pioneer'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,  litigation,  the costs and  results of  drilling  and  operations,
availability  of  drilling  equipment,  Pioneer'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  Pioneer's  10-K and 10-Q
Reports and other filings with the Securities and Exchange Commission.







                       PIONEER NATURAL RESOURCES COMPANY
                     CONDENSED 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, net                                       257,957         209,936
   Inventories                                                     65,094          40,332
   Prepaid expenses                                                18,504          10,822
   Deferred income taxes                                          233,562         115,206
   Other current assets, net                                       10,011           9,872
                                                               ----------      ----------
        Total current assets                                      649,636         393,425
                                                               ----------      ----------
Property, plant and equipment, at cost:
   Oil and gas properties, using the successful efforts
     method of accounting                                       8,599,553       8,124,616
   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 assets, net                                                 149,801         135,132
                                                               ----------      ----------
                                                              $ 7,227,613     $ 6,728,467
                                                               ==========      ==========

                      LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
   Accounts payable                                           $   273,541     $   216,051
   Interest payable                                                21,493          45,735
   Income taxes payable                                            19,125          13,520
   Deferred revenue                                               165,063             -
   Other current liabilities                                      652,954         269,153
                                                               ----------      ----------
        Total current liabilities                               1,132,176         544,459
                                                               ----------      ----------
Long-term debt                                                  1,939,296       2,385,950
Deferred income taxes                                             618,343         607,415
Deferred revenue                                                  711,669             -
Other liabilities and minority interests                          701,879         358,863
Stockholders' equity                                            2,124,250       2,831,780
                                                               ----------      ----------
                                                              $ 7,227,613     $ 6,728,467
                                                               ==========      ==========







                        PIONEER NATURAL RESOURCES COMPANY
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                    (in thousands, except for 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
                                                    ========     =========     =========     =========






                        PIONEER NATURAL RESOURCES COMPANY
                 CONDENSED 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
   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 debt extinguishment                          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
Net cash provided by (used in) investing activities   (364,909)    (975,756)       240,445     (1,340,290)
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
                                                      ========     ========     ==========     ==========







                        PIONEER NATURAL RESOURCES COMPANY
                        SUMMARY PRODUCTION AND PRICE DATA
                                   (Unaudited)



                                                       Three months ended         Nine months ended
                                                          September 30,             September 30,
                                                     ----------------------    -----------------------
                                                        2005         2004         2005         2004
                                                     ---------    ---------    ---------    ----------
                                                                                
Average Daily Sales Volumes
   from Continuing Operations:
   Oil (Bbls) -                       U.S.              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
                                                     =========    =========    =========    =========
   Natural gas liquids (Bbls) -       U.S.              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) -                        U.S.             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
                                                     =========    =========    =========    =========
Average Daily Sales Volumes
   from Discontinued Operations:
   Oil (Bbls)                         U.S.               1,066        1,850        1,709        2,587
                                      Canada               -             70           38           70
                                                     ---------    ---------    ---------    ---------
                                      Worldwide          1,066        1,920        1,747        2,657
                                                     =========    =========    =========    =========
   Natural gas liquids (Bbls)         U.S.                 131           49           87           80
                                      Canada                 2          478          149          525
                                                     ---------    ---------    ---------    ---------
                                      Worldwide            133          527          236          605
                                                     =========    =========    =========    =========
   Gas (Mcf)                          U.S.               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
                                                     =========    =========    =========    =========
Average Reported Prices (a):
   Oil (per Bbl) -                    U.S.           $   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

   Natural gas liquids (per Bbl) -    U.S.           $   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) -                    U.S.           $    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

<FN>
- -----------
(a)  Average prices are  attributable  to continuing  operations and include the
     results of hedging activities.
</FN>






                        PIONEER NATURAL RESOURCES COMPANY
                    SUPPLEMENTAL NON-GAAP FINANCIAL MEASURES
                                 (in thousands)
                                   (Unaudited)


     EBITDAX  and  discretionary  cash  flow  ("DCF")  (as  defined  below)  are
presented herein, and reconciled to the generally accepted accounting  principle
("GAAP")  measures of net income and net cash  provided by operating  activities
because  of their wide  acceptance  by the  investment  community  as  financial
indicators of a company's ability to internally fund exploration and development
activities  and to service or incur debt.  The Company  also views the  non-GAAP
measures of EBITDAX and DCF as useful  tools for  comparisons  of the  Company's
financial  indicators  with those of peer  companies  that  follow the full cost
method of accounting.  EBITDAX and DCF should not be considered as  alternatives
to net income or net cash provided by operating activities, as defined by GAAP.



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

                                                                                   
   Net income                                        $  123,573    $   80,916    $  393,789    $  210,806
   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
   Loss on debt extinguishment                           18,633           -          25,975           -
   Accretion of discount on asset retirement
      obligations                                         1,968         2,030         6,210         6,012
   Interest expense                                      29,268        24,827        92,731        67,805
   Income tax provision                                  42,483        22,893       193,722       113,688
   Loss (gain) on disposition of assets, net               (394)         (215)       (2,763)           30
   Discontinued operations                              (15,256)        5,249       (84,118)       15,778
   Current income taxes on discontinued operations          -             -           2,869           -
   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
                                                      ---------     ---------     ---------     ---------
      EBITDAX  (a)                                      391,036       331,271     1,211,861       987,377
   Less:  Cash interest expense                         (27,370)      (25,921)      (88,461)      (80,262)
          Current income taxes                          (11,998)       (7,516)      (39,308)      (19,188)
                                                      ---------     ---------     ---------     ---------
          Discretionary cash flow (b)                   351,668       297,834     1,084,092       887,927
   Less:  Cash exploration expense                      (11,381)      (18,907)      (26,067)      (26,818)
          Changes in operating assets and liabilities   (22,555)      (39,788)      (72,848)     (103,636)
                                                      ---------     ---------     ---------     ---------
   Net cash provided by operating activities         $  317,732    $  239,139    $  985,177    $  757,473
                                                      =========     =========     =========     =========
<FN>
- -------------
(a)  "EBITDAX"   represents   earnings  before   depletion,   depreciation   and
     amortization  expense;  impairment of long-lived  assets;  exploration  and
     abandonments;  loss on debt extinguishment;  accretion of discount on asset
     retirement obligations; interest expense; income taxes; gain or loss on the
     disposition  of  assets;  noncash  effects  from  discontinued  operations;
     commodity hedge related activity; amortization of stock-based compensation;
     amortization of deferred revenue; and other noncash items.
(b)  Discretionary cash flow equals cash flows from operating  activities before
     changes in operating  assets and  liabilities  and before cash  exploration
     expense.
</FN>







                        PIONEER NATURAL RESOURCES COMPANY

                            SUPPLEMENTAL INFORMATION
                             As of November 2, 2005

                         Open Commodity Hedge Positions




                                               2005
                                              ------
                                              Fourth
                                              Quarter       2006         2007         2008
                                              --------    --------    ---------    --------

                                                                       
Average Daily Oil Production Hedged:
     Swap Contracts:
     Volume (Bbl)                               27,000      10,000      13,000       17,000
     NYMEX price (Bbl)                        $  27.97    $  31.69    $  30.89     $  29.21
     Collar Contracts:
     Volume (Bbl)                                  -         9,129       4,500          -
     NYMEX price (Bbl)
         Ceiling                              $    -      $  74.92    $  90.43     $    -
         Floor                                $    -      $  44.25    $  50.00     $    -

Average Daily Gas Production Hedged:
     Swap Contracts:
     Volume (MMBtu)                            253,535      73,842      29,195        5,000
     NYMEX price (MMBtu) (a)                  $   5.20    $   4.30    $   4.30     $   5.40
     Collar Contracts:
     Volume (MMBtu)                                -       183,685     215,000          -
     NYMEX price (MMBtu)
         Ceiling                              $    -      $  14.55    $  11.95     $    -
         Floor                                $    -      $   7.00    $   6.70     $    -

<FN>
- ---------------
(a) Approximate, based on historical differentials to index prices.
</FN>



Amortization of Volumetric Production Payment Proceeds and Net Derivative Losses
                                 (in thousands)




                                              2005
                                             -------
                                             Fourth
                                             Quarter       2006      Thereafter      Total
                                             --------    --------    ----------    --------

                                                                       
VPP proceeds, net of
   transaction costs                         $ 21,061    $184,099     $635,594     $840,754
Net hedge obligations assigned                    757       6,248       28,973       35,978
                                              -------     -------      -------      -------
Total deferred revenue (a)                     21,818     190,347      664,567      876,732
Less net derivative losses to be
   recognized in pretax earnings (b)           (2,307)     (4,860)     (20,657)     (27,824)
                                              -------     -------      -------      -------
Total VPP impact to pretax
    earnings                                 $ 19,511    $185,487     $643,910     $848,908
                                              =======     =======      =======      =======

<FN>
- --------------
(a)  Deferred  revenue  will be  amortized  as increases to oil and gas revenues
     during the indicated  future periods.
(b)  Represents the remaining pretax earnings impact of the derivatives assigned
     in the VPPs.
</FN>