EXHIBIT 99.1

                                  NEWS RELEASE

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

          Pioneer Replaces 167% of Production in 2000 at $4.66 per BOE

Dallas, Texas, January 24, 2001 -- Pioneer Natural Resources Company ("Pioneer")
(NYSE:PXD)  (TSE:PXD)  announced  that as of December 31, 2000, its total proved
oil and gas reserves were 628 million  barrels oil  equivalent  (MMBOE),  or 3.8
trillion cubic feet (Tcf) natural gas equivalent,  including 312 million barrels
(MMBbls)  of crude oil and  natural  gas  liquids  and 1.9 Tcf of  natural  gas.
Discounted future net cash flow (present value at 10%) was $7.02 billion at year
end. In 2000, the Company added 73 MMBOE of proved  reserves.  Proved  developed
reserves account for 77% of total proved reserves.

"These  outstanding  results  reflect our success at refocusing on the drill bit
for growth.  Our five-year  average drill bit finding and development (F&D) cost
(excluding  acquisitions)  is $5.52  per BOE.  During  2001,  we plan a  capital
program of $430 million and plan to drill  approximately  465 wells including 25
exploration  wells,  exposing  Pioneer to significant new reserves.  We are also
moving  recent  discoveries  in the  deepwater  Gulf of Mexico and South  Africa
toward first  production in 2002 and 2003," stated Scott D. Sheffield,  Chairman
and CEO.

Pioneer  replaced 167% of its production  during 2000 at a finding cost of $4.66
per BOE. Costs incurred during 2000 totaled $340 million,  including $67 million
for  acquisitions  and $273 million for development and exploration  activities.
Excluding  acquisitions,  2000 finding cost was $4.16 per BOE.  Year-end  proved
reserves and costs incurred are detailed in the attached supplemental schedule.

Reserves as stated above are based on year-end  NYMEX prices for oil and natural
gas of $26.69 per barrel and $9.95 per Mcf,  respectively.  Under a supplemental
case using $5.00 per Mcf for natural gas, total proved  reserves were 623 MMBOE,
F&D costs averaged $5.03 per BOE,  reserve  replacement  was 155% and discounted
future net cash flow was $4.3 billion.

During 2000, Pioneer drilled 296 wells with 90% success worldwide,  including 83
exploration and extension wells with 73% success.  The Company drilled 176 wells
in the U.S.,  35 wells in Canada,  84 wells in  Argentina  and one well in South
Africa.  Domestic  drilling  included 92  Spraberry  oil wells,  54 wells in the
Hugoton/West  Panhandle  gas  field  and 30  wells  in  other  domestic  fields.
Internationally,  95 of 120 wells were  successful.  International  drilling was
primarily  focused on core areas in the Neuquen Basin in Argentina and Northeast
British Columbia in Canada.  Pioneer acquired 7.4 million BOE of proved reserves
for $4.89 per BOE  primarily  through the purchase of its interest in the Camden
Hills  discovery  in the  deepwater  GOM and  through a purchase  of  additional
interests in the Chinchaga field in Canada.

Pioneer is a large  independent oil and gas  exploration and production  company
with  operations  in the United  States,  Canada,  Argentina  and South  Africa.
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 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 which may
cause the Company's  actual results in future periods to differ  materially from
the forward-looking  statements.  These risks and uncertainties  include,  among
other  things,  volatility  of oil and gas  prices,  product  supply and demand,
competition,  government regulation or action, litigation, the costs and results
of  drilling  and  operations,  the  Company's  ability to replace  reserves  or
implement its business plans, 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 the  Company's  10-K and 10-Q Reports and other
filings with the Securities and Exchange Commission.






                        PIONEER NATURAL RESOURCES COMPANY
                            SUPPLEMENTAL INFORMATION
                          Year ended December 31, 2000

                                                                                South Africa
                                              United                               & Other
                                              States      Argentina     Canada     Foreign      Total
                                             ---------    ---------    --------    -------    ----------
                                                                               
Proved reserves:
  Oil (MBbls):
     Balance, January 1, 2000............      127,878      25,644        1,266        -        154,788
     Revisions of previous estimates:
        Related to price changes.........        6,513         -            (79)       -          6,434
        Other............................        7,689      (2,508)         497        -          5,678
     Purchases of mineral-in-place.......          841         -            -          -            841
     New discoveries and extensions......        4,819       7,908           53      5,552       18,332
     Production..........................       (8,989)     (3,238)        (308)       -        (12,535)
     Sales of mineral-in-place...........         (401)        -            -          -           (401)
                                             ---------     -------      -------    -------    ---------
     Balance, December 31, 2000..........      138,350      27,806        1,429      5,552      173,137
  Natural Gas Liquids (MBbls):
     Balance, January 1, 2000............      131,188       4,153        2,704        -        138,045
     Revisions of previous estimates:
        Related to price changes.........        4,459         -            (40)       -          4,419
        Other............................          634       3,919           51        -          4,604
     Purchases of mineral-in-place.......          396         -            140        -            536
     New discoveries and extensions......          -           158           85        -            243
     Production..........................       (7,883)       (193)        (303)       -         (8,379)
     Sales of mineral-in-place...........         (342)        -            -          -           (342)
                                             ---------     -------      -------    -------    ---------
     Balance, December 31, 2000..........      128,452       8,037        2,637        -        139,126
  Natural Gas (MMcf):
     Balance, January 1, 2000............    1,314,842     415,620      145,251        -      1,875,713
     Revisions of previous estimates:
        Related to price changes.........       29,055         -        (10,116)       -         18,939
        Other............................       34,857     (15,558)         103        -         19,402
     Purchases of mineral-in-place.......       28,071         -          7,768        -         35,839
     New discoveries and extensions......       66,486      43,914        6,132        -        116,532
     Production..........................      (83,930)    (35,694)     (16,219)       -       (135,843)
     Sales of mineral-in-place...........      (35,054)        -            -          -        (35,054)
                                             ---------     -------      -------    -------    ---------
     Balance, December 31, 2000..........    1,354,327     408,282      132,919        -      1,895,528
  Equivalent Barrels (MBOE):
     Balance, January 1, 2000............      478,206      99,067       28,179        -        605,452
     Revisions of previous estimates:
        Related to price changes.........       15,814         -         (1,805)       -         14,009
        Other............................       14,133      (1,182)         565        -         13,516
     Purchases of mineral-in-place.......        5,916         -          1,435        -          7,351
     New discoveries and extensions......       15,900      15,385        1,160      5,552       37,997
     Production..........................      (30,860)     (9,380)      (3,315)       -        (43,555)
     Sales of mineral-in-place...........       (6,586)        -            -          -         (6,586)
                                             ---------     -------      -------    -------    ---------
     Balance, December 31, 2000..........      492,523     103,890       26,219      5,552      628,184
                                             =========     =======      =======    =======    =========

Costs incurred for oil and gas producing activities ($000):
  Property acquisition costs:
     Proved..............................   $   26,102     $ 1,169      $ 8,709    $   -       $ 35,980
     Unproved............................       28,199         520        2,506        -         31,225
                                             ---------      ------       ------     ------      -------
                                                54,301       1,689       11,215        -         67,205
  Exploration costs......................       65,023      35,406        6,744     23,597      130,770
  Development costs......................       84,798      31,335       25,632        -        141,765
                                             ---------      ------       ------     ------      -------
                                            $  204,122     $68,430      $43,591    $23,597     $339,740
                                             =========      ======       ======     ======      =======
Reserve replacement percentage...........         168%        151%          41%        n/a         167%
                                             =========      ======       ======                 =======
Finding costs per BOE of proved
  reserves added.........................   $     3.94     $  4.82      $ 32.17    $  4.25     $   4.66
                                             =========      ======       ======     ======      =======