EXHIBIT 99.1


                                  NEWS RELEASE

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


                  Pioneer Reports Fourth Quarter 2004 Results,
                            Reaches Record Production

Dallas,  Texas, February 8, 2005 -- Pioneer Natural Resources Company (NYSE:PXD)
today announced  financial and operating  results for the quarter and year ended
December 31, 2004.

For the fourth quarter of 2004,  Pioneer  reported net income of $102.0 million,
or $.69 per diluted share,  an increase of $.21 or 44% per share above the prior
year quarter net income of $.48 per diluted share. Cash flow from operations for
the fourth  quarter was $347.1  million,  an increase of 60%  compared to $217.0
million  for the same period in 2003.  The  increase in net income and cash flow
primarily  resulted  from a 17%  increase  in  quarter-on-quarter  oil  and  gas
production and stronger prices for oil and gas.

Tim Dove,  President  and COO,  stated,  "We had a solid  quarter as each of our
divisions  posted  strong  results,  and with the  addition  of our new  Rockies
division,  we've set a new  production  record.  We expect  to  continue  to add
production  from  our core  properties  as we step up our  development  drilling
program in 2005 leading to  full-year  expected  production  of 70 to 74 million
barrels oil equivalent."

Scott Sheffield,  Chairman and CEO, continued, "We built significant operational
and  financial  strength  during 2004 and have further  enhanced  our  financial
flexibility  with the $593 million of proceeds we received in January by selling
just 20 million  barrels  of oil  equivalent  reserves  through  two  volumetric
production  payments.  Adding  our  expected  2005 cash flow and  proceeds  from
planned  Canadian  divestitures,  we  expect  to have  over $1  billion  of cash
available  during 2005 in excess of our current capital budget.  By reaching our
debt  reduction  targets  early,  we now have the  flexibility  to  aggressively
repurchase  shares under our new $300 million  authorization  and have purchased
approximately 600,000 shares since the end of January.

"Our 2005 drilling programs in each of our core onshore areas are well underway.
In the deepwater Gulf of Mexico,  completion  operations  have resumed at Devils
Tower and production is expected to be back on-line this week at Canyon Express.
We have an active  exploration  program  planned for the first half of this year
and the financial flexibility to fund the development of its success."

For the twelve months ended December 31, 2004, net income was $312.9 million, or
$2.46 per diluted share,  compared to $410.6 million, or $3.46 per diluted share
for the prior year which  included  the  benefit of the  Company's  reversal  of
deferred tax valuation allowances in the U.S. Cash flow from operations for 2004
was a record $1.1 billion compared to $763.7 million in 2003. Long-term debt was
$2.39  billion at year end, down $364 million from the prior year end, pro forma
for the merger with Evergreen. Pioneer repurchased 1.7 million shares during the
fourth quarter and 2.8 million shares for the full year.

As previously announced,  the Company has changed its method for reporting field
fuel,  no longer  recording it as revenue or expense and not including it in gas
sales volumes. Under the new method, fourth quarter oil and gas sales averaged a
record 191,451 barrels oil equivalent per day (BOEPD).  Fourth quarter oil sales
averaged  49,385  barrels per day (BPD) and natural gas liquids  sales  averaged
21,733 BPD. Gas sales in the fourth quarter  averaged 722 million cubic feet per
day (MMcfpd).  This change in methodology  reduced the reported  quantity of gas
sold for the fourth quarter of 2004 by 38 MMcfpd or 6,398 BOEPD.  Fourth quarter
oil and gas revenues and field operating  expenses were each $21.1 million lower
under this method.








Under the new method,  2004  annual oil and gas sales  averaged  183,412  BOEPD.
Annual oil sales averaged 46,984 BPD,  natural gas liquids sales averaged 22,201
BPD and gas sales averaged 685 MMcfpd.  This change in  methodology  reduced the
reported  quantity of gas sold for 2004 by 26 MMcfpd or 4,374 BOEPD.  Annual oil
and gas revenues and field  operating  expenses  were each $54.3  million  lower
under this method.

Because the change reduces both revenue and field operating expenses by the same
amount,  it does not impact net  income,  cash flow,  EBITDAX  (earnings  before
interest,  taxes,   depreciation,   depletion,   amortization,   impairment  and
exploration  and abandonment  costs) or net asset value.  Prior period sales and
prices have been adjusted to reflect this change.

Fourth quarter  realized  prices for oil and natural gas liquids were $35.80 and
$30.74  per  barrel,  respectively.  The  realized  price  for gas was $4.45 per
thousand  cubic feet (Mcf),  while North American  realized gas prices  averaged
$5.24 per Mcf.  Annual  realized  prices for oil and natural  gas  liquids  were
$31.38 and $25.65 per barrel,  respectively.  The annual  realized price for gas
was $4.33 per Mcf, while North American  realized gas prices  averaged $5.11 per
Mcf.

Fourth  quarter  production  costs  averaged  $5.72 per barrel of oil equivalent
(BOE).  Exploration and abandonment costs were $28.5 million for the quarter and
included  $4.5 million of dry hole and  abandonments,  $16.5 million of geologic
and  geophysical  expenses  including  seismic  costs and $7.5  million of delay
rentals and unproved acreage abandonments. Annual 2004 production costs averaged
$5.15 per BOE.  Exploration and  abandonment  costs were $181.7 million for 2004
and  included  $82.8  million  of dry hole and  abandonments,  $82.3  million of
geologic and geophysical  expenses  including seismic costs and $16.6 million of
delay rentals and unproved acreage abandonments.

For the same  quarter  last year,  Pioneer  reported  total oil and gas sales of
163,888 BOEPD,  including oil sales of 43,574 BPD,  natural gas liquids sales of
22,889 BPD and gas sales of 585 MMcfpd (excluding field fuel volumes).  Realized
prices for the 2003 fourth  quarter  were $26.60 per barrel for oil,  $19.46 per
barrel for natural gas liquids and $3.58 per Mcf for gas,  while North  American
gas prices averaged $4.14 per Mcf.

Full year 2003 total oil and gas sales  averaged  151,001  BOEPD,  including oil
sales of 35,304 BPD,  natural  gas liquids  sales of 22,562 BPD and gas sales of
559 MMcfpd (excluding field fuel volumes).  Realized prices for 2003 were $25.59
per barrel for oil,  $19.50 per barrel for natural gas liquids and $3.84 per Mcf
for gas, while North American gas prices averaged $4.51 per Mcf.

Operations Update

Pioneer is accelerating its 2005 low-risk onshore development  program,  running
12 onshore rigs in the U.S. and seven rigs in Argentina. Pioneer reported record
fourth  quarter  Argentine  gas  production  as gas demand was strong during the
summer  season and gas prices  continued to improve as  anticipated.  In Canada,
Pioneer is completing its winter development program in British Columbia running
two rigs and expects to commence  drilling in the Company's coalbed methane play
in southern Alberta during the second quarter. Production from Tunisia increased
during the fourth  quarter as first oil was achieved from the Hawa-2 well in the
Adam  producing  concession  in the BEK  block,  and  the  Company  expects  oil
production from the Adam-3 well to begin during the first quarter of 2005.

In the deepwater Gulf of Mexico, repairs to the Devils Tower spar were completed
ahead of  schedule.  The rig was placed in service on January 21, 2005 and is in
the process of  completing  the fifth of eight Devils Tower  development  wells.
Production from the Canyon Express gas system was halted on December 3, 2004 due
to a leak in the subsea line that delivers  methanol  used in field  operations.
The leak is believed to have been  caused by a Hurricane  Ivan-related  incident
which weakened the methanol line.  The line has been  successfully  repaired and
production from the system is expected to resume this week. Pioneer expects that
Canyon  Express  production  will  gradually  ramp up over the next few weeks as
debris is flushed from the line.

First quarter  exploration  activity is expected to include an appraisal well to
the 2004 Thunder Hawk  discovery and an  exploration  well on a Falcon  Corridor
satellite  prospect in the deepwater Gulf of Mexico. In Alaska, as many as three
wells are expected to test new exploration  targets,  and Pioneer plans to shoot
seismic over newly  acquired  acreage.  One well is planned in West Africa,  and
lower-risk  exploration and geologic and geophysical  work will also continue in
Argentina, Canada and Tunisia.







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.

First quarter 2005  production  is expected to average  175,000 to 190,000 BOEPD
excluding  field  fuel.  This  range is lower than the  fourth  quarter  average
reflecting the VPP volumes sold, more days of downtime and a gradual ramp up for
the Canyon  Express  system,  the timing of oil cargo  shipments  in Tunisia and
South Africa which were high during the fourth quarter, and the typical seasonal
decline in gas demand during Argentina's summer season.

First quarter  production costs (including  production and ad valorem taxes) are
expected to average  $6.00 to $6.50 per BOE based on current  NYMEX strip prices
for oil and  gas.  The  increase  over the  prior  quarter  is a  result  of the
retention of operating  costs related to the VPP volumes sold, an increase in ad
valorem  taxes and  additional  workovers  planned  during the  Canadian  winter
drilling season.  Production costs are expected to decline in the second quarter
of 2005 as  lower-cost  volumes  resume  from the  deepwater  Gulf of Mexico and
workovers return to more normal levels. 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 $80 million to $110
million. As indicated in the operations update above,  several exploration wells
and significant  seismic  investments are planned during the quarter,  front-end
loading the exploration program for the year. General and administrative expense
is expected to be $24 million to $26 million. Interest expense is expected to be
$33 million to $36  million,  and  accretion  of  discount  on asset  retirement
obligations is expected to be approximately $2 million to $3 million.

The  Company's  effective  income tax rate is  expected to range from 36% to 39%
based on current  capital  spending  plans,  including  cash income  taxes of $5
million to $10 million that are  principally  related to Argentine  and Tunisian
income  taxes and  nominal  alternative  minimum  tax in the U.S.  Other than in
Argentina and Tunisia, the Company continues to benefit from the carryforward of
net operating losses and other positive tax attributes.

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 fourth  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)  231-9012  (confirmation  code:  261674) 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:
261674).

Pioneer is a large  independent oil and gas  exploration and production  company
with  operations in the United States,  Argentina,  Canada,  Equatorial  Guinea,
South  Africa  and  Tunisia.  Pioneer's  headquarters  are in  Dallas.  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  that 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,  government  regulation  or  action,
international  operations  and associated  international  political and economic
instability,  litigation,  the costs and  results of  drilling  and  operations,
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)



                                                           December 31,    December 31,
                                                               2004            2003
                                                           -----------     -----------
                                                           (Unaudited)
ASSETS
                                                                     
Current assets:
  Cash and cash equivalents                                $     7,257     $    19,299
  Accounts receivable, net                                     210,279         111,480
  Inventories                                                   40,332          17,509
  Prepaid expenses                                              10,822          11,083
  Deferred income taxes                                         33,980          40,514
  Other current assets, net                                      9,529           5,230
                                                            ----------      ----------
       Total current assets                                    312,199         205,115
                                                            ----------      ----------
Property, plant and equipment, at cost:
  Oil and gas properties, using the successful efforts
     method of accounting                                    8,124,616       5,163,383
  Accumulated depletion, depreciation and amortization      (2,243,549)     (1,676,136)
                                                            ----------      ----------
       Total property, plant and equipment                   5,881,067       3,487,247
                                                            ----------      ----------
Deferred income taxes                                            2,963         192,344
Goodwill                                                       315,880             -
Other assets, net                                              135,132          66,866
                                                            ----------      ----------
                                                           $ 6,647,241     $ 3,951,572
                                                            ==========      ==========

LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable                                         $   216,051     $   186,418
  Interest payable                                              45,735          37,034
  Income taxes payable                                          13,520           5,928
  Other current liabilities                                    269,153         200,372
                                                            ----------      ----------
       Total current liabilities                               544,459         429,752
                                                            ----------      ----------
Long-term debt                                               2,385,950       1,555,461
Deferred income taxes                                          526,189          12,121
Other liabilities                                              358,863         194,466
Stockholders' equity                                         2,831,780       1,759,772
                                                            ----------      ----------
                                                           $ 6,647,241     $ 3,951,572
                                                            ==========      ==========








                        PIONEER NATURAL RESOURCES COMPANY
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                    (in thousands, except for per share data)



                                                  Three months ended                Year ended
                                                      December 31,                 December 31,
                                                -----------------------     -------------------------
                                                   2004          2003          2004            2003
                                                ---------     ---------     ----------     ----------
                                               (Unaudited)   (Unaudited)   (Unaudited)
                                                                               
Revenues and other income:
   Oil and gas                                  $ 519,481     $ 340,153     $1,832,663     $1,273,871
   Interest and other                               9,517         7,971         14,074         12,292
   Gain (loss) on disposition of assets, net           69          (320)            39          1,256
                                                 --------      --------      ---------      ---------
                                                  529,067       347,804      1,846,776      1,287,419
                                                 --------      --------      ---------      ---------
Costs and expenses:
   Oil and gas production                         100,690        69,270        345,504        254,750
   Depletion, depreciation and amortization       155,634       116,698        574,874        390,840
   Impairment of oil and gas properties             4,859           -           39,684            -
   Exploration and abandonments                    28,535        25,330        181,689        132,760
   General and administrative                      25,520        16,213         80,528         60,545
   Accretion of discount on asset retirement
      obligations                                   2,198         1,384          8,210          5,040
   Interest                                        35,582        21,862        103,387         91,388
   Other                                           22,705         9,115         33,687         21,320
                                                 --------      --------      ---------      ---------
                                                  375,723       259,872      1,367,563        956,643
                                                 --------      --------      ---------      ---------
Income before income taxes and cumulative
   effect of change in accounting principle       153,344        87,932        479,213        330,776
Income tax benefit (provision)                    (51,296)      (30,558)      (166,359)        64,403
                                                 --------      --------      ---------      ---------
Income before cumulative effect of
   change in accounting principle                 102,048        57,374        312,854        395,179
Cumulative effect of change in accounting
   principle, net of tax                              -             -              -           15,413
                                                 --------      --------      ---------      ---------
Net income                                      $ 102,048     $  57,374     $  312,854     $  410,592
                                                 ========      ========      =========      =========
Basic earnings per share:
   Income before cumulative effect
       of change in accounting principle        $     .71     $     .49     $     2.50     $     3.37
   Cumulative effect of change in accounting
       principle, net of tax                          -             -             -               .13
                                                 --------      --------      ---------      ---------
   Net income                                   $     .71     $     .49     $     2.50     $     3.50
                                                 ========      ========      =========      =========
Diluted earnings per share:
   Income before cumulative effect
       of change in accounting principle        $     .69     $     .48     $     2.46     $     3.33
   Cumulative effect of change in accounting
       principle, net of tax                          -             -             -               .13
                                                 --------      --------      ---------      ---------
   Net income                                   $     .69     $     .48     $     2.46     $     3.46
                                                 ========      ========      =========      =========
Weighted average shares outstanding:
   Basic                                          144,249       117,763        125,156        117,185
                                                 ========      ========      =========      =========
   Diluted                                        148,840       119,199        127,488        118,513
                                                 ========      ========      =========      =========






                        PIONEER NATURAL RESOURCES COMPANY
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)



                                                        Three months ended               Year ended
                                                            December 31,                December 31,
                                                     ------------------------     -------------------------
                                                        2004          2003           2004          2003
                                                     ----------    ----------     -----------    ----------
                                                     (Unaudited)   (Unaudited)    (Unaudited)
                                                                                     
Cash flows from operating activities:
   Net income                                        $  102,048    $   57,374     $   312,854    $  410,592
   Depletion, depreciation and amortization             155,634       116,698         574,874       390,840
   Impairment of oil and gas properties                   4,859           -            39,684           -
   Exploration expenses, including dry holes             20,497        14,486         146,833        97,690
   Deferred income taxes                                 45,268        28,350         141,143       (75,588)
   Loss (gain) on disposition of assets, net                (69)          320             (39)       (1,256)
   Accretion of discount on asset retirement
      obligations                                         2,198         1,384           8,210         5,040
   Interest related amortization                            249        (6,650)        (12,208)      (20,610)
   Commodity hedge related amortization                 (11,258)      (17,697)        (45,102)      (71,816)
   Cumulative effect of change in accounting
      principle, net of tax                                 -             -               -         (15,413)
   Amortization of stock based compensation               4,709         1,108          12,503         5,429
   Other noncash items                                   10,421           707          16,913         4,966
   Changes in operating assets and liabilities, net
     of effects from acquisitions:
      Accounts receivable, net                          (28,286)      (14,270)        (73,376)      (10,983)
      Inventories                                        (4,273)        1,161         (14,025)       (7,734)
      Prepaid expenses                                    3,008         2,806             974        (5,598)
      Other current assets, net                            (875)        2,674             262          (602)
      Accounts payable                                   27,952        29,652             179        58,603
      Interest payable                                   19,973        (1,005)          5,533          (424)
      Income taxes payable                                  377         2,012           3,372         5,928
      Other current liabilities                          (5,358)       (2,107)        (14,037)       (5,385)
                                                      ---------     ---------      ----------     ---------
Net cash provided by operating activities               347,074       217,003       1,104,547       763,679
Net cash used in investing activities                  (191,231)     (167,151)     (1,531,521)     (662,300)
Net cash provided by (used in) financing activities    (151,947)      (43,079)        414,258       (91,720)
                                                      ---------     ---------      ----------     ---------
Net increase (decrease) in cash and cash equivalents      3,896         6,773         (12,716)        9,659
Effect of exchange rate changes on cash
   and cash equivalents                                     412          (125)            674         1,150
Cash and cash equivalents, beginning
   of period                                              2,949        12,651          19,299         8,490
                                                      ---------     ---------      ----------     ---------
Cash and cash equivalents, end of period             $    7,257    $   19,299     $     7,257    $   19,299
                                                      =========     =========      ==========     =========








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



                                                    Three months ended             Year ended
                                                        December 31,              December 31,
                                                  -----------------------    ----------------------
                                                     2004         2003          2004         2003
                                                  ---------     ---------    ---------    ---------
                                                                           
Average Daily Production:
   Oil (Bbls) -                       U.S.           27,733        25,704       26,637       24,525
                                      Argentina       7,662        10,132        8,534        8,687
                                      Canada            256            90          137          111
                                      Africa         13,734         7,648       11,676        1,981
                                                  ---------     ---------    ---------    ---------
                                      Total          49,385        43,574       46,984       35,304

   Natural gas liquids (Bbls) -       U.S.           19,348        20,871       19,738       20,338
                                      Argentina       1,537         1,115        1,546        1,318
                                      Canada            848           903          917          906
                                                  ---------     ---------    ---------    ---------
                                      Total          21,733        22,889       22,201       22,562

   Gas (Mcf) -                        U.S.          546,460       453,458      521,839      423,013
                                      Argentina     128,247        91,791      121,654       94,128
                                      Canada         47,291        39,299       41,867       41,669
                                                  ---------     ---------    ---------    ---------
                                      Total         721,998       584,548      685,360      558,810

Total Production:
   Oil (MBbls)                                        4,543         4,009       17,196       12,886
   Natural gas liquids (MBbls)                        1,999         2,106        8,126        8,235
   Gas (MMcf)                                        66,424        53,778      250,842      203,966
   Total equivalent barrels (MBOE)                   17,614        15,078       67,129       55,115

Average Reported Prices (a):
   Oil (per Bbl) -                    U.S.        $   32.41     $   25.78    $   29.41    $   25.25
                                      Argentina   $   31.87     $   26.37    $   28.06    $   25.62
                                      Canada      $   52.84     $   30.74    $   44.83    $   29.10
                                      Africa      $   44.54     $   29.59    $   38.12    $   29.52
                                      Worldwide   $   35.80     $   26.60    $   31.38    $   25.59

   Natural gas liquids (per Bbl) -    U.S.        $   30.27     $   19.21    $   25.07    $   19.04
                                      Argentina   $   33.49     $   22.81    $   29.91    $   22.85
                                      Canada      $   36.47     $   20.94    $   30.87    $   24.80
                                      Worldwide   $   30.74     $   19.46    $   25.65    $   19.50

   Gas (per Mcf) -                    U.S.        $    5.23     $    4.10    $    5.15    $    4.47
                                      Argentina   $     .77     $     .56    $     .66    $     .56
                                      Canada      $    5.33     $    4.60    $    4.64    $    4.93
                                      Worldwide   $    4.45     $    3.58    $    4.33    $    3.84
<FN>
- ---------------
(a) Average prices 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              Year ended
                                                       December 31,                December 31,
                                                  ----------------------    ------------------------
                                                     2004        2003          2004           2003
                                                  ---------    ---------    ----------    ----------

                                                                              
Net income                                        $ 102,048    $  57,374    $  312,854    $  410,592
Depletion, depreciation and amortization            155,634      116,698       574,874       390,840
Impairment of oil and gas properties                  4,859          -          39,684           -
Exploration and abandonments                         28,535       25,330       181,689       132,760
Accretion of discount on asset retirement
  obligations                                         2,198        1,384         8,210         5,040
Interest expense                                     35,582       21,862       103,387        91,388
Income tax provision (benefit)                       51,296       30,558       166,359       (64,403)
Loss (gain) on disposition of assets, net               (69)         320           (39)       (1,256)
Commodity hedge related amortization                (11,258)     (17,697)      (45,102)      (71,816)
Cumulative effect of change in accounting
   principle, net of tax                                -            -             -         (15,413)
Amortization of stock-based compensation              4,709        1,108        12,503         5,429
Other noncash items                                  10,421          707        16,913         4,966
                                                   --------     --------     ---------     ---------
    EBITDAX (a)                                     383,955      237,644     1,371,332       888,127

Less:  Cash interest expense                        (35,333)     (28,512)     (115,595)     (111,998)
       Current income taxes                          (6,028)      (2,208)      (25,216)      (11,185)
                                                   --------     --------     ---------     ---------
    Discretionary cash flow (b)                     342,594      206,924     1,230,521       764,944

Less:  Cash exploration expense                      (8,038)     (10,844)      (34,856)      (35,070)
       Changes in operating assets and liabilities   12,518       20,923       (91,118)       33,805
                                                   --------    ---------    ----------     ---------
    Net cash provided by operating activities     $ 347,074    $ 217,003    $1,104,547    $  763,679
                                                   ========     ========     =========     =========
<FN>
- -------------
(a)  "EBITDAX"   represents   earnings  before   depletion,   depreciation   and
     amortization expense; impairment of oil and gas properties; exploration and
     abandonments;  accretion  of  discount  on  asset  retirement  obligations;
     interest expense;  income taxes; gain or loss on the disposition of assets;
     commodity  hedge  related  amortization;  cumulative  effect  of  change in
     accounting principle, net of tax; amortization of stock-based compensation;
     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 February 7, 2005


                         Open Commodity Hedge Positions
                         ------------------------------



                                                                 2005
                                          ----------------------------------------------------
                                           First     Second      Third     Fourth
                                          Quarter    Quarter    Quarter    Quarter      Year       2006       2007       2008
                                          --------   --------   --------   --------   --------   --------   --------   --------
                                                                                               
Average Daily Oil Production Hedged:
     Swap Contracts:
     Volume (Bbl)                           27,000     27,000     27,000     27,000     27,000     10,000     13,000     17,000
     NYMEX price (per Bbl)                $  27.97   $  27.97   $  27.97   $  27.97   $  27.97   $  31.69   $  30.89   $  29.21
     Collar Contracts:
     Volume (Bbl)                              -          -          -          -          -        3,500        -          -
     NYMEX price (per Bbl):
       Ceiling                            $    -     $    -     $    -      $   -     $    -     $  41.95   $    -     $    -
       Floor                              $    -     $    -     $    -      $   -     $    -     $  35.00   $    -     $    -

Average Daily Gas Production Hedged:
     Swap Contracts:
     Volume (MMBtu)                        290,000    280,000    280,000    250,000    274,904     70,000     25,000      5,000
     NYMEX price (per MMBtu) (a)          $   5.30   $   5.15 $     5.15   $   5.15   $   5.20   $   4.25   $   3.95   $   5.40
     Collar Contracts:
     Volume (MMBtu)                            -          -          -          -          -        5,000        -          -
     NYMEX price (per MMBtu):
       Ceiling                            $    -     $    -     $    -      $   -     $    -     $   7.15   $    -     $    -
       Floor                              $    -     $    -     $    -      $   -     $    -     $   5.25   $    -     $    -
<FN>

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



         Amortization of Volumetric Production Payment Deferred Revenue
         --------------------------------------------------------------
                                 (in thousands)



                                                        2005
                                ----------------------------------------------------
                                 First     Second      Third     Fourth
                                Quarter    Quarter    Quarter    Quarter      Year       2006     Thereafter     Total
                                --------   --------   --------   --------   --------   --------   ----------   ---------
                                                                                       

Oil revenue                     $    -     $    -     $    -     $    -     $    -     $ 57,608    $ 259,606   $ 317,214
Gas revenue                       11,107     17,132     17,320     17,320     62,879     53,725      158,634     275,238
                                 -------    -------    -------    -------    -------    -------     --------    --------

   Total deferred revenue (a)   $ 11,107   $ 17,132   $ 17,320   $ 17,320   $ 62,879   $111,333    $ 418,240   $ 592,452
                                 =======    =======    =======    =======    =======    =======     ========    ========

<FN>
  --------------
(a)  Deferred  revenue  will be  amortized  as increases to oil and gas revenues
     during the indicated  future periods.  These amounts reflect the net impact
     of  deferred  revenue  amortization  and  associated  commodity  derivative
     amortization from other comprehensive income to oil and gas revenues.
</FN>