EXHIBIT 99.1


                                  NEWS RELEASE

                                      Company Contacts:           (972) 444-9001
                                      Investors:                  Frank Hopkins
                                                                  Scott Rice
                                      Media and Public Affairs:   Susan Spratlen


                   Pioneer Reports Third Quarter 2006 Results

Dallas,  Texas, November 1, 2006 -- Pioneer Natural Resources Company (NYSE:PXD)
today announced  financial and operating results for the quarter ended September
30, 2006.

   o  Pioneer reported net income of $81 million, or $.64 per diluted share.
   o  Third quarter oil and gas sales from continuing operations averaged 98,525
      barrels oil equivalent per day (BOEPD).
   o  North American production  for the first nine months of 2006 rose 14% from
      equivalent volumetric  production payment  (VPP) adjusted  2005 nine-month
      levels,  reflecting  the  continuing  success  of  Pioneer's   accelerated
      development drilling program.
   o  Production  growth is on track to  reach approximately 36  million barrels
      oil equivalent (BOE),  near the high end  of the 2006 production  guidance
      range of 33 million to 37 million BOE.
   o  The Company  purchased  3.1 million  shares at $39.54 per share during the
      quarter,  completing  $294  million  of the  remaining $359  million share
      repurchase program authorized by the Board of Directors.
   o  Pioneer exited the quarter with net debt-to-book capitalization of 27%.

Income from continuing operations for the third quarter of 2006 was $81 million,
or $.64 per  diluted  share,  as compared  to $62  million,  or $.44 per diluted
share, for the third quarter of 2005.

Cash flow from  operating  activities  for the  third  quarter  of 2006 was $183
million.

Pioneer also  increased its 2007 natural gas hedge  position by 91 million cubic
feet per day  (Mmcfpd).  The 2007 hedges were added at  NYMEX-equivalent  prices
greater than $9.00 per  thousand  cubic feet (Mcf) in order to protect a portion
of the  economics  associated  with the  Company's  planned  2007  gas  drilling
program.

Scott D. Sheffield, Pioneer's Chairman and CEO, stated, "Our strategy to deliver
strong, consistent production growth in North America is on track to provide the
results we expected for 2006 and lay the  foundation  for another strong year in
2007. Our low-risk onshore development  programs are delivering high returns and
consistent   growth,  and  with  the  contributions  from  our  resource  plays,
especially  the Edwards Trend play and the  initiation  of  production  from the
South Coast Gas project  during the second half of 2007, I am confident  that we
will reach our 10+% production per share growth target for 2007."

Operations Review

Pioneer  currently  has 39 rigs running in North  America and one rig running in
Tunisia.  By the end of 2006, an  additional  rig will be added in North America
bringing the total to 40 rigs as compared to 23 rigs at the end of 2005. Average
daily oil and gas  production  from North America  increased 3% during the third
quarter from the average for the first half of 2006, and is on target to meet or
exceed the high end of the forecasted 2006 exit rate of 90,000 to 95,000 BOEPD.

In the Permian Basin, Pioneer is running 20 rigs and through October has drilled
approximately  240 of the 335  wells  expected  during  2006.  The  Company  has
increased  nine-month oil and gas sales 23% above 2005 nine-month levels,  after
adjusting for the Company's VPPs for comparison purposes. Production growth from
the Spraberry  field is on target to exceed the Company's exit rate forecast and
is being  driven by the success of Pioneer's  deeper  drilling  campaign,  which
increases  reserves and production by including the deeper  Wolfcamp  formation,
and new opportunities from bolt-on acquisitions.  Year-to-date, more than 90,000
gross acres have been leased in the Permian Basin.






Mid-Continent production from the Hugoton and West Panhandle gas fields is being
maintained at consistent levels and is exceeding expectations.

In the Rocky  Mountains,  nine-month  coal bed methane  (CBM)  production in the
Raton  field was up 9% from the same period in 2005.  During the third  quarter,
Pioneer added a third rig and through October has drilled  approximately  250 of
the 330 Raton wells planned for 2006. Raton production for the third quarter was
up 5%  compared to the first half of 2006,  and the  Company  now  expects  2006
production  from the Raton  field to exceed  the 5% to 7% annual  growth  target
announced earlier this year.

In South Texas, Pioneer is running five rigs in the Edwards Trend and expects to
add another rig in early 2007.  The Company has 245,000  gross acres under lease
and  continues  to develop  its  Pawnee  and Word  fields  while  expanding  the
potential of the trend by drilling  exploration and appraisal wells on new field
prospects.  Pioneer  drilled a new  discovery  during the third  quarter and has
drilled six discoveries to date in 2006. Two new processing facilities were also
added during the third quarter. The Company has tied in five new discovery wells
which are currently  producing  approximately  6 Mmcfpd,  and has twelve Edwards
expansion  wells  currently  drilling  or  waiting  to be tied in to  pipelines,
including two wells that are expected to begin producing in early November which
tested at approximately 3.5 Mmcfpd each.

During the fourth quarter, Pioneer plans to test one new prospect and drill five
appraisal  wells and four  development  wells.  In addition,  approximately  850
square  miles of 3-D seismic data will be acquired on new  discoveries  in South
Texas through 2007 to support new field  development  drilling which is expected
to be initiated mid-2007.

In Canada,  nine-month production is up 16% compared to the same period of 2005,
and third quarter  production  rose 15% compared to the first half of 2006.  The
Company has drilled 85 Horseshoe  Canyon CBM wells and has three rigs running to
complete the 175 wells  planned for 2006.  Pioneer  expects to have 120 wells on
production  by year end and to tie in the remaining 55 wells in early 2007 after
adding compression facilities during the fourth quarter.

On the North Slope of Alaska, Pioneer has completed the construction, contouring
and  armoring of the gravel  drill site for the  Oooguruk  development  project.
Current  activities  include  procuring  equipment  and  services,   fabricating
equipment  and  modifying  the drilling rig for  installation  during 2007.  The
project is on schedule to achieve first oil production in 2008.

Offshore South Africa,  production  from the Sable oil field continues to exceed
expectations and development  drilling continues on the South Coast Gas Project,
a seven-well subsea tie-back to the existing F-A platform. Subsea infrastructure
is expected to be in place for project startup and first  production  during the
second half of 2007.

In Tunisia,  the Hawa appraisal well became the ninth successful well drilled on
the Adam  Concession  and is  expected to be  producing  by the end of the year.
During the fourth  quarter,  Pioneer  expects to drill  another well on the Adam
Concession,  two wells in the  Pioneer-operated  Jenein Nord block and a well in
the Borj El Khadra block.

Financial Review

Third quarter oil sales  averaged  23,699  barrels per day (BPD) and natural gas
liquids sales averaged  19,352 BPD. Gas sales in the third quarter  averaged 333
Mmcfpd. The reported price for oil was $70.89 per barrel and included $13.38 per
barrel  related  to  deferred  revenue  from VPPs for which  production  was not
recorded.  The price for natural gas liquids was $39.08 per barrel. The reported
price for gas was $6.33 per Mcf and  included  $.60 per Mcf  related to deferred
revenue from VPPs for which production was not recorded.

Third  quarter  production  costs  averaged  $11.36  per  BOE.  Exploration  and
abandonment  costs were $44 million for the quarter and  included $13 million of
unsuccessful  drilling costs,  $27 million of geologic and geophysical  expenses
including seismic and personnel costs and $4 million of acreage and other costs.

Financial Outlook

The following  statements  are estimates  based on current  expectations.  These
forward-looking  statements  are subject to a number of risks and  uncertainties
that 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 2006  production is expected to average 98,000 to 103,000 BOEPD.
Fourth quarter  production costs (including  production and ad valorem taxes and
transportation  costs) are expected to average $11.00 to $12.00 per BOE based on
current  NYMEX  strip  prices  for  oil and  gas.  Depreciation,  depletion  and
amortization expense is expected to average $10.00 to $11.00 per BOE.

Total exploration and abandonment  expense during the fourth quarter is expected
to be $45 million to $110  million  and  includes  approximately  $15 million of
costs associated with an unsuccessful test of the Flying Cloud prospect adjacent
to Pioneer's Clipper  discovery  (deepwater Gulf of Mexico) and could include up
to $15 million associated with high-impact  onshore drilling in Mississippi.  It
could also include $30 million associated with lower-risk  resource plays in the
Edwards Trend in South Texas,  Uinta/Piceance basins in the Rockies,  Canada and
Tunisia  and up to $15 million for  acreage  and other  expenses.  In  addition,
exploration  expense is  expected  to include  $30  million to $35  million  for
seismic  investments and personnel,  primarily  related to the onshore  resource
plays  Pioneer is  currently  pursuing.  General and  administrative  expense is
expected to be $29 million to $33  million.  Interest  expense is expected to be
$24  million  to $28  million,  offset by  interest  income of $1  million to $3
million. Accretion of discount on asset retirement obligations is expected to be
$1 million to $2 million.

The Company's fourth quarter effective income tax rate is expected to range from
35% to 45% based on  current  capital  spending  plans.  Cash  income  taxes are
expected  to range  from $5  million  to $15  million,  principally  related  to
Tunisian income taxes and nominal alternative minimum tax in the U.S.

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

Earnings Conference Call

This  afternoon at 1:00 p.m.  Eastern  Time,  Pioneer will discuss its quarterly
financial and operating results with an accompanying presentation. The call will
be webcast on Pioneer's website,  www.pxd.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)
289-0528  (confirmation  code:  6893514) 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: 6893514).

Pioneer is a large  independent oil and gas exploration and production  company,
headquartered  in  Dallas,  with  operations  in the United  States,  Canada and
Africa. For more information, visit Pioneer's website at www.pxd.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,   the  ability  to  obtain
environmental  and  other  permits  and the  timing  thereof,  other  government
regulation  or action,  third  party  approvals,  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
(including its plan to repurchase  stock), or complete its development  projects
as scheduled,  access to and cost of capital,  uncertainties  about estimates of
reserves, the assumptions underlying production forecasts,  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 (the "SEC").




                        PIONEER NATURAL RESOURCES COMPANY
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                 (in thousands)




                                                             September 30,     December 31,
                                                                 2006              2005
                                                             ------------      -----------
                                                             (Unaudited)
                                     ASSETS
                                                                         
Current assets:
   Cash and cash equivalents                                 $   100,072       $    18,802
   Accounts receivable, net                                      161,476           337,658
   Inventories                                                   109,509            79,659
   Prepaid expenses                                               16,497            18,091
   Deferred income taxes                                          82,638           158,878
   Other current assets, net                                      47,963            10,716
                                                             -----------       -----------
        Total current assets                                     518,155           623,804
                                                             -----------       -----------
Property, plant and equipment, at cost:
   Oil and gas properties, using the successful efforts
     method of accounting                                      7,772,354         8,813,134
   Accumulated depletion, depreciation and amortization       (1,816,875)       (2,577,946)
                                                             -----------       -----------
        Total property, plant and equipment                    5,955,479         6,235,188
                                                             -----------       -----------
Goodwill                                                         310,626           311,651
Other assets, net                                                214,025           158,591
                                                             -----------       -----------
                                                             $ 6,998,285       $ 7,329,234
                                                             ===========       ===========

                      LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
   Accounts payable                                          $   333,475       $   345,204
   Interest payable                                               26,032            40,314
   Income taxes payable                                           34,397            22,470
   Deferred revenue                                              183,031           190,327
   Other current liabilities                                     301,552           435,040
                                                             -----------       -----------
        Total current liabilities                                878,487         1,033,355
                                                             -----------       -----------
Long-term debt                                                 1,194,556         2,058,412
Deferred income taxes                                          1,105,118           767,329
Deferred revenue                                                 528,576           664,511
Other liabilities and minority interests                         322,214           588,525
Stockholders' equity                                           2,969,334         2,217,102
                                                             -----------       -----------
                                                             $ 6,998,285       $ 7,329,234
                                                             ===========       ===========







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



                                                     Three months ended                Nine months ended
                                                        September 30,                     September 30,
                                                  -------------------------       ----------------------------
                                                     2006           2005              2006             2005
                                                  ----------     ----------       -----------     ------------
                                                                                       
Revenues and other income:
   Oil and gas                                    $  418,106     $  389,679       $ 1,205,144      $ 1,033,842
   Interest and other                                 15,229          7,885            42,081           21,936
   Gain (loss) on disposition of assets, net            (708)           375            (4,184)           2,625
                                                  ----------     ----------       -----------      -----------
                                                     432,627        397,939         1,243,041        1,058,403
                                                  ----------     ----------       -----------      -----------
Costs and expenses:
   Oil and gas production                            102,969         92,809           300,718          253,393
   Depletion, depreciation and amortization           95,288         75,836           265,678          215,143
   Impairment of long-lived assets                         -             21                 -              644
   Exploration and abandonments                       43,820         56,364           210,080          147,691
   General and administrative                         30,421         29,817            92,136           83,901
   Accretion of discount on asset retirement
     obligations                                       1,168          1,094             3,470            3,183
   Interest                                           23,586         28,862            82,928           91,011
   Other                                              14,779         34,185            31,592           58,739
                                                  ----------     ----------       -----------      -----------
                                                     312,031        318,988           986,602          853,705
                                                  ----------     ----------       -----------      -----------
Income from continuing operations before
     income taxes                                    120,596         78,951           256,439          204,698
Income tax provision                                 (40,270)       (17,438)         (111,194)         (93,234)
                                                  ----------     ----------       -----------      -----------

Income from continuing operations                     80,326         61,513           145,245          111,464
Income from discontinued operations, net of tax          473         62,060           566,800          282,325
                                                  ----------     ----------       -----------     ------------
Net income                                        $   80,799     $  123,573       $   712,045     $    393,789
                                                  ==========     ==========       ===========     ============
Basic earnings per share:
   Income from continuing operations              $      .65     $      .45       $      1.15     $        .79
   Income from discontinued operations,
     net of tax                                            -            .45              4.52             2.01
                                                  ----------     ----------       -----------      -----------
   Net income                                     $      .65     $      .90       $      5.67     $       2.80
                                                  ==========     ==========       ===========     ============
Diluted earnings per share:
   Income from continuing operations              $      .64     $      .44       $      1.14     $        .79
   Income from discontinued operations,
     net of tax                                            -            .44              4.39             1.95
                                                  ----------     ----------       -----------     ------------
   Net income                                     $      .64     $      .88       $      5.53     $       2.74
                                                  ==========     ==========       ===========     ============
Weighted average shares outstanding:
   Basic                                             124,021        137,655           125,520          140,436
                                                  ==========     ==========       ===========      ===========
   Diluted                                           126,734        141,786           129,134          144,770
                                                  ==========     ==========       ===========      ===========








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



                                                         Three months ended              Nine months ended
                                                            September 30,                  September 30,
                                                    ---------------------------     ---------------------------
                                                        2006            2005            2006            2005
                                                    -----------     -----------     -----------     -----------
                                                                                        
Cash flows from operating activities:
  Net income                                        $    80,799     $   123,573     $   712,045     $   393,789
  Adjustments to reconcile net income to net
    cash provided by operating activities:
      Depletion, depreciation and amortization           95,288          75,836         265,678         215,143
      Impairment of long-lived assets                         -              21               -             644
      Exploration expenses, including dry holes          15,981          38,609         127,917          67,571
      Deferred income taxes                              43,336           4,383         110,520          60,759
      Loss (gain) on disposition of assets, net             708            (375)          4,184          (2,625)
      Loss on extinguishment of debt                          -          18,633           8,076          25,975
      Accretion of discount on asset retirement
        obligations                                       1,168           1,094           3,470           3,183
      Discontinued operations                            (3,248)         78,804        (543,903)        262,876
      Interest expense                                    2,357           1,493           7,522           2,555
      Commodity hedge related activity                   (3,867)          1,658          (9,420)         (9,069)
      Stock-based compensation                            7,047           6,449          25,357          19,619
      Amortization of deferred revenue                  (47,396)        (21,882)       (143,231)        (53,956)
      Other noncash items                                 4,494           4,059          14,018           9,758
  Changes in operating assets and liabilities,
    net of effects from acquisition:
      Accounts receivable, net                           (1,351)          9,047         161,814         (45,255)
      Inventories                                       (12,988)         (8,964)        (52,113)        (21,667)
      Prepaid expenses                                   (1,673)        (13,513)            291          (7,705)
      Other current assets, net                          (7,214)            405           1,978            (124)
      Accounts payable                                   80,005          27,730         (33,636)         37,294
      Interest payable                                   (1,202)        (21,593)        (11,476)        (25,957)
      Income taxes payable                              (37,995)         (6,314)         17,820           5,605
      Other current liabilities                         (31,551)         (9,350)        (22,624)        (15,039)
                                                    -----------     -----------     -----------     -----------
Net cash provided by operating activities               182,698         309,803         644,287         923,374
Net cash provided by (used in) investing
  activities                                           (367,179)       (356,980)        598,112         302,248
Net cash provided by (used in) financing
  activities                                           (172,403)         52,616      (1,162,843)     (1,171,751)
                                                    -----------     -----------     -----------     -----------
Net increase (decrease) in cash and cash
  equivalents                                          (356,884)          5,439          79,556          53,871
Effect of exchange rate changes on cash and
  cash equivalents                                          (86)            618           1,714           3,380
Cash and cash equivalents, beginning of period          457,042          58,451          18,802           7,257
                                                    -----------     -----------     -----------     -----------
Cash and cash equivalents, end of period            $   100,072     $    64,508     $   100,072     $    64,508
                                                    ===========     ===========     ===========     ===========








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



                                                   Three months ended           Nine months ended
                                                      September 30,               September 30,
                                                 -----------------------     ----------------------
                                                    2006         2005           2006          2005
                                                 ---------     ---------     ---------     ---------
                                                                               
Average Daily Sales Volumes
  from Continuing Operations:
   Oil (Bbls) -                     U.S.            17,575        21,484        17,406        21,290
                                    Canada             312           209           299           194
                                    Africa           5,812         9,666         6,680        10,686
                                                 ---------     ---------     ---------     ---------
                                    Worldwide       23,699        31,359        24,385        32,170
                                                 =========     =========     =========     =========

   Natural gas liquids (Bbls) -     U.S.            18,884        18,176        18,599        16,835
                                    Canada             468           502           433           510
                                                 ---------     ---------     ---------     ---------
                                    Worldwide       19,352        18,678        19,032        17,345
                                                 =========     =========     =========     =========

   Gas (Mcf) -                      U.S.           286,182       274,390       282,450       269,807
                                    Canada          46,664        37,562        42,456        36,160
                                                 ---------     ---------     ---------     ---------
                                    Worldwide      332,846       311,952       324,906       305,967
                                                 =========     =========     =========     =========
Average Daily Sales Volumes
  from Discontinued Operations:
   Oil (Bbls) -                     U.S.                 -         3,715         3,208         5,478
                                    Argentina            -         7,930         3,362         7,972
                                    Canada               -             -             -            38
                                                 ---------     ---------     ---------     ---------
                                    Worldwide            -        11,645         6,570        13,488
                                                 =========     =========     =========     =========

   Natural gas liquids (Bbls) -     U.S.                 -           131             -            87
                                    Argentina            -         1,917           563         1,814
                                    Canada               -             2             -           149
                                                 ---------     ---------     ---------     ---------
                                    Worldwide            -         2,050           563         2,050
                                                 =========     =========     =========     =========

   Gas (Mcf) -                      U.S.              (140)      189,429        48,195       248,556
                                    Argentina            -       142,399        58,700       136,023
                                    Canada               -           347            58         8,676
                                                 ---------     ---------     ---------     ---------
                                    Worldwide         (140)      332,175       106,953       393,255
                                                 =========     =========     =========     =========
Average Reported Prices (a):
   Oil (per Bbl) -                  U.S.         $   70.96     $   34.57     $   66.91     $   31.37
                                    Canada       $   70.44     $   68.77     $   70.09     $   51.73
                                    Africa       $   70.73     $   59.57     $   66.49     $   51.40
                                    Worldwide    $   70.89     $   42.51     $   66.83     $   38.15

   Natural gas liquids (per Bbl) -  U.S.         $   38.73     $   34.40     $   36.15     $   29.78
                                    Canada       $   53.11     $   49.93     $   55.01     $   43.22
                                    Worldwide    $   39.08     $   34.82     $   36.58     $   30.18

   Gas (per Mcf) -                  U.S.         $    6.24     $    7.18     $    6.30     $    6.67
                                    Canada       $    6.91     $    7.51     $    7.27     $    6.57
                                    Worldwide    $    6.33     $    7.22     $    6.43     $    6.66
<FN>
- -----------
(a)  Average prices are  attributable  to continuing  operations and include the
     results of hedging activities and amortization of VPP deferred revenue.
</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,
                                                 -------------------------     -------------------------
                                                    2006           2005            2006           2005
                                                 ----------     ----------     ----------     ----------
                                                                                  
   Net income                                    $   80,799     $  123,573     $  712,045     $  393,789
   Depletion, depreciation and amortization          95,288         75,836        265,678        215,143
   Impairment of long-lived assets                        -             21              -            644
   Exploration and abandonments                      43,820         56,364        210,080        147,691
   Accretion of discount on asset retirement
     obligations                                      1,168          1,094          3,470          3,183
   Interest expense                                  23,586         28,862         82,928         91,011
   Income tax provision                              40,270         17,438        111,194         93,234
   Loss (gain) on disposition of assets, net            708           (375)         4,184         (2,625)
   Loss on extinguishment of debt                         -         18,633          8,076         25,975
   Discontinued operations                           (3,248)        78,804       (543,903)       262,876
   Current income taxes on discontinued
      operations                                        412         (1,056)       152,987          6,833
   Cash exploration expense on discontinued
      operations                                         10          1,558          2,155          7,788
   Commodity hedge related activity                  (3,867)         1,658         (9,420)        (9,069)
   Stock-based compensation                           7,044          6,449         25,354         19,619
   Amortization of deferred revenue                 (47,396)       (21,882)      (143,231)       (53,956)
   Other noncash items                                4,494          4,059         14,018          9,725
                                                 ----------     ----------     ----------     ----------
       EBITDAX (a)                                  243,088        391,036        895,615      1,211,861

   Less:  Cash interest expense                     (21,229)       (27,369)       (75,406)       (88,423)
          Current income taxes                        2,654        (11,999)      (153,661)       (39,308)
                                                 ----------     ----------     ----------     ----------
          Discretionary cash flow (b)               224,513        351,668        666,548      1,084,130

   Less:  Cash exploration expense                  (27,849)       (19,313)       (84,318)       (87,908)
          Changes in operating assets and
            liabilities                             (13,966)       (22,552)        62,057        (72,848)
                                                 ----------     ----------     ----------     ----------
   Net cash provided by operating activities     $  182,698     $  309,803     $  644,287     $  923,374
                                                 ==========     ==========     ==========     ==========
<FN>
- -------------
(a)  "EBITDAX"   represents   earnings  before   depletion,   depreciation   and
     amortization  expense;  impairment of long-lived  assets;  exploration  and
     abandonments;  accretion  of  discount  on  asset  retirement  obligations;
     interest expense;  income taxes; gain or loss on the disposition of assets;
     loss  on  extinguishment   of  debt;   noncash  effects  from  discontinued
     operations;  commodity hedge related  activity;  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 October 30, 2006

                         Open Commodity Hedge Positions




                                               2006
                                              Fourth
                                              Quarter          2007            2008
                                             ----------     ----------     ----------
                                                                  
Average Daily Oil Production Hedged:
    Swap Contracts:
    Volume (Bbl)                                  5,000          6,000          6,500
    NYMEX price (Bbl)                        $    37.20     $    31.26     $    31.19
    Collar Contracts:
    Volume (Bbl)                                  6,500              -              -
    NYMEX price (Bbl)
       Ceiling                               $    66.41     $        -     $        -
       Floor                                 $    41.92     $        -     $        -

Average Daily Gas Production Hedged:
    Swap Contracts:
    Volume (MMBtu)                               63,875        109,195         15,000
    NYMEX price (MMBtu) (a)                  $     4.30     $     8.00     $     9.10
    Collar Contracts:
    Volume (MMBtu)                               95,000          6,164              -
    NYMEX price (MMBtu)(a)
       Ceiling                               $    15.25     $    12.82     $        -
       Floor                                 $     6.96     $    10.00     $        -
<FN>
- ---------------
(a) Approximate, based on historical differentials to index prices.

</FN>


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



                                               2006
                                              Fourth
                                              Quarter          2007        Thereafter        Total
                                             ----------     ----------     ----------     ----------

                                                                              
VPP proceeds, net of transaction costs       $   45,527     $  175,216     $  460,322     $  681,065
Net hedge obligations assigned                    1,569          6,016         22,957         30,542
                                             ----------     ----------     ----------     ----------

Total deferred revenue (a)                       47,096        181,232        483,279        711,607
Less net derivative losses to be recognized
    in pretax earnings (b)                         (396)        (3,540)       (17,117)       (21,053)
                                             ----------     ----------     ----------     ----------

Total VPP impact to pretax earnings          $   46,700     $  177,692     $  466,162     $  690,554
                                             ==========     ==========     ==========     ==========
<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>






                        PIONEER NATURAL RESOURCES COMPANY

                            SUPPLEMENTAL INFORMATION
                             As of October 30, 2006
                                   (continued)


                Deferred Gains (Losses) on Terminated Hedges (a)
                                 (in thousands)




                                              2006
                                             Fourth
                                             Quarter          2007           2008         Thereafter
                                            ---------     -----------     -----------     ----------

                                                                              
Commodity hedge gains (losses) (b)          $   1,834     $   (66,845)    $   (68,574)    $        -
Debt hedge losses (c)                             (58)           (325)           (371)        (4,412)
                                            ---------     -----------     -----------     ----------

    Total deferred gains (losses)           $   1,776     $   (67,170)    $   (68,945)    $   (4,412)
                                            =========     ===========     ===========     ==========
<FN>
- --------------
(a) Excludes deferred hedge gains and losses on terminated VPPs.
(b)  Deferred  commodity  hedge gains will be  amortized as increases to oil and
     gas revenues  during the indicated  future  periods and deferred  commodity
     hedge losses will be amortized as  decreases  during the  indicated  future
     periods.
(c)  Deferred  debt hedge  losses will be  amortized  as  increases  to interest
     expense during the indicated future periods.

</FN>