EXHIBIT 99.1
                                  NEWS RELEASE

                     Investor Relations Contact: Susan Spratlen   (972) 444-9001

                   Pioneer Reports Second Quarter 2001 Results

Dallas,  Texas, July 27, 2001 -- Pioneer Natural  Resources Company  ("Pioneer")
(NYSE:PXD)  (TSE:PXD)  today announced  financial and operating  results for the
second quarter of 2001.

Second Quarter Results

Pioneer  reported net income of $28.3  million,  or $0.28 per share on a diluted
basis, for the second quarter of 2001. Second quarter net income included a $1.5
million gain on the disposition of assets and a $9.3 million mark-to-market gain
primarily related to derivatives not treated as hedges. Earnings as adjusted for
the above items were $17.6 million or $0.18 per share.  For the same period last
year, Pioneer reported a net loss of $16.1 million or $0.16 per share. Cash flow
from  operations for the second  quarter of 2001 was $135.3 million  compared to
$122.2 million for the second quarter of 2000.

Scott  D.  Sheffield,  Chairman  and  CEO  stated,  "We  are  pleased  with  our
accomplishments  during the second quarter. We increased  production 6% over the
prior quarter,  sanctioned two high-impact development projects,  completed five
successful  exploration  wells,  and continued an aggressive  hedging program to
lock in returns and protect  cash flow.  We plan to drill three key  exploration
wells  during the second  half of the year and  continue  to move ahead with the
development of Canyon Express, Devils Tower and Sable to achieve our targets for
production growth in 2002 and 2003."

Second quarter oil sales  averaged  34,482 barrels per day (BPD) and natural gas
liquid  sales  averaged  21,546  BPD.  Natural  gas sales in the second  quarter
averaged 366 million  cubic feet per day  (MMcfpd).  On a barrel oil  equivalent
(BOE)  basis,  total sales  averaged  117,047 BPD.  Realized  prices for oil and
natural gas liquids  for the second  quarter  were $24.74 and $19.29 per barrel,
respectively.  The realized  price for natural gas was $3.10 per thousand  cubic
feet (Mcf).

Second quarter production costs averaged $4.88 per BOE, a $0.71 per BOE decrease
compared to the first quarter.  The decrease  primarily resulted from reductions
in field fuel costs and  production  taxes due to lower gas prices.  Exploration
and abandonment costs of $46.6 million for the quarter included $16.0 million of
geologic and  geophysical  expenses  including  seismic  costs,  $2.2 million of
non-cash leasehold  abandonments  including expired leases, and $28.4 million of
exploration  costs.  More exploratory wells were drilled during the quarter than
were originally  scheduled,  causing total  exploration and abandonment costs to
exceed  forecasts  for the  quarter.  Several  wells were  drilled  earlier than
originally  scheduled,  and one  unscheduled  well was drilled in Tunisia.  As a
result of the accelerated schedule,  fewer wells will be drilled during the last
half of the year reducing potential exploration and abandonment costs.

For the same  quarter  last  year,  Pioneer  reported  oil sales of 33,404  BPD,
natural  gas  liquids  sales of 23,520 BPD and  natural gas sales of 381 MMcfpd.
Realized  prices for the 2000  second  quarter  were  $22.59 per barrel for oil,
$18.37 per barrel for natural gas liquids and $2.60 per Mcf for natural gas.

Six Month Results

For the six months  ended June 30,  2001,  Pioneer  reported net income of $96.3
million, or $0.97 per share on a diluted basis. Excluding a gain of $8.8 million
on the  disposition  of assets and a $.5 million  mark-to-market  gain primarily
related to  derivatives  not treated as hedges,  profits as adjusted  were $87.0
million or $0.87 per share.  For the same period last year,  Pioneer  reported a
net loss of $1.3 million,  or $0.01 per share. Cash flow from operations for the
six- month  period was $267.1  million  compared to $169.4  million for the same
period in 2000.







Six-month  oil sales  averaged  34,809 BPD and natural  gas  liquids  sales were
20,989  BPD.  Natural  gas sales were 349  MMcfpd.  On a BOE basis,  total sales
averaged 114,047 BPD.  Six-month realized price for oil increased from the prior
year  period to $24.89 per  barrel.  Realized  price for natural gas liquids was
$20.94 per barrel.  Realized  price for  natural gas was $3.80 per Mcf.  For the
first  half of 2000,  Pioneer  reported  oil sales of 34,082  BPD,  natural  gas
liquids sales of 23,093 BPD and natural gas sales of 370 MMcfpd. Realized prices
for the 2000 six-month  period were $22.51 per barrel for oil, $18.68 per barrel
for natural gas liquids and $2.29 per Mcf for natural gas.

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.

Third  quarter  production  is  expected  to  average  117 to 120 MBPD on an oil
equivalent basis. Third quarter lease operating expenses  (including  production
and ad valorem  taxes) are  expected to average  $4.60 to $4.80 per BOE based on
today's NYMEX strip prices for oil and natural gas. Depreciation,  depletion and
amortization  is expected to average $5.30 to $5.60 per BOE.  Total  exploration
and abandonment expense is expected to be $15 million to $35 million. Three Gulf
of Mexico  exploration wells are scheduled during the third quarter on the Malta
and Ozona Deep prospects and an appraisal well on the Stirrup discovery. General
and administrative expense is expected to be approximately $9 million.  Interest
expense is expected to be $34 million to $35 million, including approximately $3
million  of  non-cash  interest.  The  effective  tax  rate  is  expected  to be
approximately 5% of pre-tax income as the Company benefits from the carryforward
of prior  years' net  operating  losses in the U.S.  and  Canada.  For the third
quarter of 2001,  cost  incurred is expected to range from $115  million to $125
million.

The Company has oil and  natural gas hedges that will impact  third  quarter and
future  period  realizations.  These  hedges  are  summarized  in  the  attached
schedules.

Earnings Conference Call

On  Friday,  July 27,  2001,  at 9:00  a.m.  Central,  investors  will  have the
opportunity  to  listen  to  the  second  quarter   earnings  call  and  view  a
presentation    over   the   Internet   via   Pioneer's   website   located   at
http://www.pioneernrc.com.  At the website, select the "Investors" button at the
top of the page; then select "Earnings Calls" from the list across the bottom of
the page. To listen to the live call, please go to the website approximately ten
minutes early to register,  download and install any necessary  audio  software.
For those who cannot listen to the live broadcast, a replay will be available on
the website  shortly after the call.  Alternately,  you may dial (800)  314-7867
(confirmation  code:  424086)  to  listen  to the  conference  call and view the
accompanying  visual  presentation  at the Internet  address  above. A telephone
replay will be available by dialing (888) 203-1112--confirmation code: 424086.

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

Financial statements and schedules attached.

Except for historical information contained herein, the statements in this Press
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  Natural
Resources  Company 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, 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, and environmental  risks. 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)
                                               (Unaudited)


                                                     June 30,      December 31,
                                                       2001            2000
                                                    -----------    -----------
ASSETS

                                                             
Current assets:
  Cash and cash equivalents                         $    18,227    $    26,159
  Accounts receivable                                   102,682        125,654
  Inventories                                            15,068         14,842
  Deferred income taxes                                   5,600          4,800
  Other current assets                                   59,642         19,936
                                                     ----------     ----------
       Total current assets                             201,219        191,391
                                                     ----------     ----------
Property, plant and equipment, at cost:
  Oil and gas properties, using the successful
     efforts method of accounting                     3,611,183      3,417,094
  Accumulated depletion, depreciation
     and amortization                                (1,003,926)      (902,139)
                                                     ----------     ----------
                                                      2,607,257      2,514,955
                                                     ----------     ----------
Deferred income taxes                                    83,611         84,400
Other assets, net                                       169,967        163,689
                                                     ----------     ----------
                                                    $ 3,062,054    $ 2,954,435
                                                     ==========     ==========
LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable                                  $   116,246    $   102,275
  Interest payable                                       39,056         38,142
  Other current liabilities                              91,382         76,097
                                                     ----------     ----------
       Total current liabilities                        246,684        216,514
                                                     ----------     ----------
Long-term debt, less current maturities               1,572,227      1,578,776
Other noncurrent liabilities                            179,656        225,740
Deferred income taxes                                    24,485         28,500
Stockholders' equity                                  1,039,002        904,905
                                                     ----------     ----------
                                                    $ 3,062,054    $ 2,954,435
                                                     ==========     ==========








                        PIONEER NATURAL RESOURCES COMPANY

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


                                                     Three months ended        Six months ended
                                                           June 30,                 June 30,
                                                   ----------------------    ---------------------
                                                      2001        2000          2001       2000
                                                   ---------   ----------    ---------   ---------
                                                                             
Revenues:
   Oil and gas                                     $ 218,611   $  197,947    $ 476,597   $ 372,322
   Interest and other                                 10,955        5,186       16,122       8,941
   Gain (loss) on disposition of assets, net           1,472       (4,779)       8,765       3,593
                                                    --------     --------     --------    --------
                                                     231,038      198,354      501,484     384,856
                                                    --------     --------     --------    --------
Costs and expenses:
   Oil and gas production                             51,974       43,140      107,776      86,262
   Depletion, depreciation and amortization  -
     oil and gas                                      54,025       49,713      102,070      97,611
   Depletion, depreciation and amortization -
     other                                             3,371        3,836        7,487       7,846
   Exploration and abandonments                       46,583       27,696       69,466      40,771
   General and administrative                          8,005        6,963       18,453      16,722
   Interest                                           34,260       41,863       69,876      81,618
   Other                                               1,874       30,486       27,091      44,899
                                                    --------     --------     --------    --------
                                                     200,092      203,697      402,219     375,729
                                                    --------     --------     --------    --------
Income (loss) before income taxes and
   extraordinary item                                 30,946       (5,343)      99,265       9,127
Income tax (provision) benefit                        (2,608)       1,600       (3,008)      1,900
                                                    --------     --------     --------    --------
Income (loss) before extraordinary item               28,338       (3,743)      96,257      11,027
Extraordinary item - loss on early extinguishment
   of debt, net of tax                                   -        (12,318)         -       (12,318)
                                                    --------     --------     --------    --------
Net income (loss)                                  $  28,338   $  (16,061)   $  96,257   $  (1,291)
                                                    ========    =========     ========    ========
Net income (loss) per share:
   Basic:
     Income (loss) before extraordinary item       $     .29   $     (.04)   $     .98   $     .11
     Extraordinary item                                  -           (.12)         -          (.12)
                                                    --------     --------     --------    --------
       Net income (loss)                           $     .29   $     (.16)   $     .98   $    (.01)
                                                    ========    =========     ========    ========
   Diluted:
     Income (loss) before extraordinary item       $     .28   $     (.04)   $     .97   $     .11
     Extraordinary item                                  -           (.12)         -          (.12)
                                                    --------     --------     --------    --------
       Net income (loss)                           $     .28   $     (.16)   $     .97   $    (.01)
                                                    ========    =========     ========    ========
Weighted average shares outstanding:
   Basic                                              98,337       99,683       98,358      99,923
                                                    ========     ========     ========    ========
   Diluted                                            99,700      100,092       99,709     100,187
                                                    ========     ========     ========    ========








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



                                                      Three months ended        Six months ended
                                                           June 30,                  June 30,
                                                     ---------------------    ---------------------
                                                       2001        2000          2001       2000
                                                     ---------   ---------    ---------   ---------

                                                                              
Cash flows from operations:
   Net income (loss)                                 $  28,338   $ (16,061)   $  96,257   $  (1,291)
   Depletion, depreciation and amortization             57,396      53,549      109,557     105,457
   Exploration and abandonments                         40,985      20,320       62,832      30,052
   Deferred income taxes                                   138      (2,400)      (4,662)     (3,900)
   (Gain) loss on disposition of assets, net            (1,472)      4,779       (8,765)     (3,593)
   Interest related amortization                         2,889       3,239        5,887       6,388
   Derivative mark-to-market                            (9,278)     28,471         (525)     41,958
   Extraordinary item - loss on early
     extinguishment of debt                                -        12,318          -        12,318
   Other noncash items                                   1,946         902        3,752       1,930
   Changes in operating assets and liabilities:
      Accounts receivable                                1,605      19,857       28,054         907
      Inventories                                       (2,036)     (2,130)        (912)     (2,320)
      Other current assets                                 922       2,644       (5,032)      1,995
      Accounts payable                                   6,750        (697)     (18,857)    (14,460)
      Interest payable                                     194      10,724          914       2,212
      Other current liabilities                          6,953     (13,350)      (1,436)     (8,287)
                                                      --------    --------     --------    --------
Net cash provided by operating activities              135,330     122,165      267,064     169,366
Net cash used in investing activities                 (138,689)    (42,921)    (227,490)    (82,855)
Net cash provided by (used in) financing activities      3,184     (74,024)     (47,364)    (82,936)
                                                      --------    --------     --------    --------
Net increase (decrease) in cash and cash equivalents      (175)      5,220       (7,790)      3,575
Effect of exchange rate changes on cash
   and cash equivalents                                     97         (87)        (142)        (94)
Cash and cash equivalents, beginning
   of period                                            18,305      33,136       26,159      34,788
                                                      --------    --------     --------    --------
Cash and cash equivalents, end of period             $  18,227   $  38,269    $  18,227   $  38,269
                                                      ========    ========     ========    ========








                        PIONEER NATURAL RESOURCES COMPANY

                        SUMMARY PRODUCTION AND PRICE DATA



                                                      Three months ended        Six months ended
                                                            June 30,                 June 30,
                                                     ---------------------    ---------------------
                                                       2001         2000         2001       2000
                                                     ---------   ---------    ---------   ---------
                                                                              
Average Daily Production:
   Oil (Bbls) -                       U.S.              23,913      24,300       24,279      25,051
                                      Argentina          9,727       8,317        9,687       8,221
                                      Canada               842         787          843         810
                                                     ---------   ---------    ---------   ---------
                                      Total             34,482      33,404       34,809      34,082

   Natural gas liquids (Bbls) -       U.S.              19,968      21,988       19,447      21,712
                                      Argentina            569         557          543         502
                                      Canada             1,009         975          999         879
                                                     ---------   ---------    ---------   ---------
                                      Total             21,546      23,520       20,989      23,093

   Gas (Mcf) -                        U.S.             214,351     229,520      211,530     231,798
                                      Argentina         98,934     104,473       89,536      94,718
                                      Canada            52,831      47,497       48,427      43,833
                                                     ---------   ---------    ---------   ---------
                                      Total            366,116     381,490      349,493     370,349

Total Production:
   Oil (MBbls)                                           3,138       3,040        6,300       6,203
   Natural gas liquids (MBbls)                           1,961       2,140        3,799       4,203
   Gas (MMcf)                                           33,316      34,716       63,258      67,403
   Equivalent barrels (MBOE)                            10,651      10,966       20,642      21,640

Average Price*:
   Oil (per Bbl) -                    U.S.           $   24.39   $   20.86    $   24.82   $   20.43
                                      Argentina      $   25.68   $   27.38    $   25.14   $   28.40
                                      Canada         $   23.88   $   25.35    $   23.85   $   27.28
                                      Average        $   24.74   $   22.59    $   24.89   $   22.51

   Natural gas liquids (per Bbl) -    U.S.           $   18.78   $   18.12    $   20.59   $   18.48
                                      Argentina      $   22.60   $   23.58    $   24.70   $   21.72
                                      Canada         $   27.34   $   20.99    $   25.86   $   21.67
                                      Average        $   19.29   $   18.37    $   20.94   $   18.68

   Gas (per Mcf) -                    U.S.           $    3.93   $    3.24    $    4.75   $    2.76
                                      Argentina      $    1.34   $    1.20    $    1.30   $    1.16
                                      Canada         $    3.03   $    2.55    $    4.29   $    2.26
                                      Average        $    3.10   $    2.60    $    3.80   $    2.29

* Average prices include the effects of commodity hedges.








                        PIONEER NATURAL RESOURCES COMPANY
                            SUPPLEMENTAL INFORMATION
                                 (in thousands)
                                   (Unaudited)

     Discretionary cash flow and EBITDAX (as defined below) are presented herein
because of their wide acceptance as financial  indicators of a company's ability
to internally  fund  exploration  and  development  activities and to service or
incur debt.  Discretionary  cash flow and EBITDAX  should not be  considered  as
alternatives to net cash provided by operating activities,  net income (loss) or
income  (loss) from  continuing  operations,  as defined by  generally  accepted
accounting  principles.  Discretionary  cash flow and EBITDAX should also not be
considered as indicators of the Company's financial performance, as alternatives
to cash flow, as measures of liquidity or as being comparable to other similarly
titled measures of other companies.


                                                  Three months ended       Six months ended
                                                        June 30,               June 30,
                                                ---------------------    ---------------------
                                                   2001        2000         2001       2000
                                                ---------   ---------    ---------   ---------
                                                                         
Discretionary cash flows*:

   Net income (loss)                            $  28,338   $ (16,061)   $  96,257   $  (1,291)
   Depletion, depreciation and amortization        57,396      53,549      109,557     105,457
   Exploration and abandonments                    46,583      27,696       69,466      40,771
   Deferred income taxes                              138      (2,400)      (4,662)     (3,900)
   (Gain) loss on disposition of assets, net       (1,472)      4,779       (8,765)     (3,593)
   Interest related amortization                    2,889       3,239        5,887       6,388
   Derivative mark-to-market                       (9,278)     28,471         (525)     41,958
   Extraordinary item - loss on early
     extinguishment of debt                           -        12,318          -        12,318
   Other noncash items                              1,946         902        3,752       1,930
                                                ---------    --------     --------    --------

      Discretionary cash flow                   $ 126,540   $ 112,493    $ 270,967   $ 200,038
                                                 ========    ========     ========    ========
- -------------

*  Discretionary  cash flows  equal cash  flows from  operations  before working
   capital changes and exploration and abandonments.

EBITDAX**:

   Net income (loss)                            $  28,338   $ (16,061)   $  96,257   $  (1,291)
   Depletion, depreciation and amortization        57,396      53,549      109,557     105,457
   Exploration and abandonments                    46,583      27,696       69,466      40,771
   Consolidated interest expense                   34,260      41,863       69,876      81,618
   Consolidated income taxes                        2,608      (1,600)       3,008      (1,900)
   (Gain) loss on disposition of assets, net       (1,472)      4,779       (8,765)     (3,593)
   Derivative mark-to-market                       (9,278)     28,471         (525)     41,958
   Extraordinary item - loss on early
     extinguishment of debt                           -        12,318          -        12,318
   Other noncash expenses                             652       1,086        1,519       2,126
                                                 --------    --------     --------    --------

                                                $ 159,087   $ 152,101    $ 340,393   $ 277,464
                                                 ========    ========     ========    ========
- -------------
**  "EBITDAX"   represents   earnings   before   depletion,   depreciation   and
    amortization expense;  impairment of oil and gas properties; exploration and
    abandonments; consolidated interest expense; consolidated income taxes; gain
    or loss  on the  disposition  of assets;  extraordinary  items;  and,  other
    noncash expenses.








                        PIONEER NATURAL RESOURCES COMPANY
                            SUPPLEMENTAL INFORMATION

                             Hedge Positions - Oil*




                                                  2001                            2002                   2003
                                     -----------------------------   -----------------------------   -------------
                                                                                                        First &
                                         Third          Fourth           First          Second           Second
                                        Quarter         Quarter         Quarter         Quarter         Quarters
                                     -------------   -------------   -------------   -------------   -------------

                                                                                      
Daily oil production:

  Swaps:
  Volume (Bbl)  ...................         25,033          16,641         10,000                            6,000
  NYMEX price   ...................  $       28.75   $       28.37   $      27.20                    $       24.02

  Collars:
  Volume (Bbl)  ...................          2,000           2,000         10,000           10,000
  NYMEX price   ...................  $25.00-$31.43   $25.00-$31.43   $25.00-$28.56   $25.00-$28.56

  Total Oil - % Hedged.............            74%             48%            56%              28%             11%





                             Hedge Positions - Gas*

                                                  2001                   2002            2003             2004
                                     -----------------------------   -------------   -------------   -------------

                                         Third          Fourth
                                        Quarter         Quarter
                                     -------------   -------------
                                                                                      
Daily gas production:

  Swaps:
  New Volume (Mcf).................         75,000          71,685        142,500          180,000         190,000
  NYMEX Price (MMBtu)..............  $        5.50   $        5.65   $       4.35    $        4.00   $        4.00
  Existing Volume (Mcf)............         49,223          49,223
  NYMEX Price** (MMBtu)............  $        2.50   $        2.50

  Collars:
  New Volume (Mcf).................                                        20,000
  NYMEX Price** (MMBtu)............                                  $ 4.50-$6.00
  Existing Volume (Mcf)............         54,482          54,482
  NYMEX Price** (MMBtu)............  $  2.25-$2.90   $  2.25-$2.90

  N. Amer. Gas - % Hedged..........            66%             66%            52%              48%             52%


* Hedge positions are as of July 26, 2001.
**Approximate, based on historical differentials to index prices.