Perpetual Energy Inc. Updates 2010 Year-end Reserves for Montney at Elmworth, Restates Year-end 2010 Reserves and Announces Asset Disposition for $9.0 Million

By Perpetual Energy Inc., PRNE
Wednesday, February 23, 2011

CALGARY, Alberta, February 24, 2011 - Perpetual Energy Inc. ("Perpetual" or the "Corporation") is pleased to
release a supplemental independent reserve report for its Elmworth Montney
asset prepared by GLJ Petroleum Consultants ("GLJ"). Based on the most
current information, GLJ has recently prepared a report for the operator of
this property and that report, when extrapolated to Perpetual's interests in
the area, recognizes material reserves and value for Perpetual attributable
to this asset. Perpetual engaged GLJ to prepare a reserve report (the
"Supplemental Reserve Report") for the Elmworth property as a supplement to
the Corporation's year-end reserve report provided by McDaniel and Associates
Consultants Ltd. ("McDaniel") dated February 7, 2011. The following
information highlights Perpetual's Elmworth Montney reserve assignments and
restates Perpetual's 2010 year-end reserves.

ELMWORTH MONTNEY YEAR-END 2010 RESERVES

The Supplemental Reserve Report recognizes 14.5 Bcfe (2.4 MMboe) of
proven and 32.1 Bcfe (5.3 MMboe) of proved and probable reserves to
Perpetual's interest. Using the GLJ January 1, 2011 price forecast, the net
present value of the reserves discounted at 8 percent is estimated at $14.7
million
for proved reserves and $43.6 million for total proved and probable
reserves net to Perpetual, including recovery of future development capital
("FDC"). These reserves had previously been classified by McDaniel and
Associates Consultants Ltd. ("McDaniel") as contingent resources pending the
definition of a development plan which was not available at the time their
report was completed. Through an information swap with other nearby
producers, the operator has since gathered the necessary data to build an
economic development plan for the area. Perpetual has reviewed the
development plan, and is in agreement with the assignment of reserves at this
time. Based on the development plan, GLJ has assigned 20 to 25 bbls per MMcf
of associated natural gas liquid (NGL) reserves to the Montney at Elmworth.
Liquids recovery could be enhanced through a development plan that
incorporated improved deep cut liquids recovery as test results indicate free
condensate in the order of 20 to 25 bbls per MMcf and other entrained NGL's
of an additional 20 to 40 bbls per MMcf which could potentially be
recoverable depending on the liquids recovery process. GLJ estimates FDC
required to convert the non-producing and undeveloped reserves to producing
reserves at $45.1 million. This reserve assignment impacts only seven of the
42 sections of land that were assigned contingent resources by McDaniel,
leaving 145 Bcfe (24.2 MMboe) of best estimate contingent resource, net to
Perpetual, to be converted to reserves in the future.

RESTATEMENT OF YEAR-END 2010 RESERVES

The Corporation is pleased to release a revised summary of Perpetual's
combined year-end 2010 reserves information, as evaluated by the independent
engineering firms McDaniel and GLJ.

Year-End Reserve Highlights

    - In 2010, Perpetual added 72.1 Bcfe (12.0 MMboe) of proved and
      probable reserves, replacing 129% of its production (111% on a total
      proved basis).

    - After dispositions of 53.1 Bcfe (8.9 MMboe) and production of 55.9
      Bcfe (9.3 MMboe) in 2010, proved and probable reserves increased
      three percent from 471.6 Bcfe (78.6 MMboe) at year-end 2009 to 487.7
      Bcfe (81.3 MMboe) and proved reserves increased two percent to 250.4
      Bcfe (41.7 MMboe) at year-end 2010.

    - Excluding downward revisions related solely to changes in natural gas
      pricing at year-end 2010 of 22.3 Bcfe (3.7 MMboe), Perpetual's
      reserves grew eight percent year over year from 471.6 Bcfe (78.6
      MMboe) to 510.0 Bcfe (85.0 MMboe), offsetting production of 55.9 Bcfe
      (9.3 MMboe) and net dispositions of 9.8 Bcfe (1.6 MMboe), which
      included the disposition of 34.2 Bcf (5.7 MMboe) of probable shut-in
      gas over bitumen reserves where the effective cash flow through the
      Government of Alberta's financial solution was retained by Perpetual.

    - Reserve additions which offset production and dispositions were a
      result of total net capital spending of $163.2 million, including
      investment of $114.1 million in exploration and development capital
      spending programs excluding spending for the development of
      Perpetual's gas storage asset at Warwick ("Warwick Gas Storage"), as
      well as various asset acquisitions in the Edson and Birchwavy areas
      during the year.

    - Including changes in future development capital ("FDC"), Perpetual
      realized finding and development costs ("F&D") of $1.67 per Mcfe
      ($10.02 per BOE) on a proved and probable reserve basis in 2010. This
      results in a recycle ratio of 3.0 based on a 2010 estimated cash flow
      netback of $4.94 per Mcfe, which includes cash flow as a result of
      natural gas hedging gains, and 1.3 based on an estimated 2010 average
      cash flow netback of $2.24 per Mcfe, excluding natural gas hedges.
      Excluding changes in FDC, F&D in 2010 was $1.39 per Mcfe ($8.34 per
      BOE).

    - Perpetual's realized finding, development and acquisition costs
      ("FD&A"), including changes in FDC, was $2.15 per Mcfe ($12.90 per
      BOE) on a proved and probable basis. FD&A costs were significantly
      impacted by relatively low disposition metrics on a reserve basis
      associated with the sale of probable shut-in gas over bitumen
      reserves without the related effective funds flow from future royalty
      reductions in the Legend, Liege and Surmont areas of 34.2 Bcf (5.7
      MMboe) for net proceeds of $39.8 million. Perpetual retained the
      effective funds flow for these shut-in gas over bitumen reserves
      making the asset sales incomparable to other transactions, therefore
      the proceeds and reserves associated from these dispositions have
      been removed for purposes of the FD&A calculation. Excluding changes
      in FDC, FD&A in 2010 was $1.93 per Mcfe ($11.58 per BOE).

    - In addition to their year-end reserve assessment, McDaniel prepared
      an independent contingent resource assessment report (the "Contingent
      Resource Report") for the Montney formation in the Elmworth area.
      Giving consideration to the assignment of reserves in seven sections
      in the Elmworth area by GLJ, the McDaniel contingent resource report
      has been adjusted to reflect the assignment of reserves to seven of
      the 42 sections of land assigned contingent resource by McDaniel. The
      adjusted report assigns gross original gas in place ("OGIP") on 35
      sections of company interest lands of 809.4 Bcf plus associated NGLs.
      Assuming a range in recovery factors from 20 to 50 percent, gross
      recoverable sales gas is estimated from a low of 137.6 Bcf with 4.9
      MMbbls of NGLs (166.7 Bcfe, 27.8 MMboe) to a high of 344.0 Bcf with
      20.2 MMbbls NGLs (465.4 Bcfe, 77.6 MMboe), with McDaniel's best
      estimate at 35 percent recovery factor translating to 240.8 Bcf with
      11.3 MMbbls NGLs (308.8 Bcfe, 51.5 MMboe). On a working interest
      basis, the best estimate recoverable contingent resource is estimated
      at 145.0 Bcfe (24.2 MMboe). Perpetual has an additional 34 gross
      sections in the Elmworth area which have not yet been evaluated
      through drilling in the Montney formation and therefore have no
      contingent resource or reserves assigned as yet.

    - Perpetual's reserve to production ratio ("reserve life index" or
      "RLI") is 8.7 years on a proved and probable reserves basis (4.9
      years on a proved reserves basis) at year-end 2010.

    - Perpetual's reserve-based net asset value ("NAV") at year-end 2010 is
      estimated at $5.24 per Share discounted at eight percent.

Reserves Disclosure

Company interest reserves included herein are before royalty burdens and
including royalty interests. Reserves information is based on independent
reserves evaluation reports prepared by McDaniel dated February 7, 2011 (the
"McDaniel Report"), and GLJ dated February 22, 2010 (the "GLJ Report") both
with an effective date of December 31, 2010 and has been prepared in
accordance with National Instrument 51-101 ("NI 51-101") using McDaniel's and
GLJ's forecast prices and costs respectively. Complete NI 51-101 reserves
disclosure including after-tax reserve values, reserves by major property and
abandonment costs will be included in Perpetual's Annual Information Form
("AIF"), which will be filed in March 2011.

Approximately 94 percent of Perpetual's proved and proved and probable
reserves are natural gas and as such the Corporation reports reserves in Mcf
equivalent (Mcfe). Mcfe may be misleading, particularly if used in isolation.
In accordance with NI 51-101 a Mcfe conversion ratio for oil of 1 Bbl: 6 Mcf
has been used, which is based on an energy equivalency conversion method
primarily applicable at the burner tip and does not necessarily represent a
value equivalency at the wellhead.

    Perpetual's consolidated reserves at year-end 2010 are summarized below.

    Reserves at December 31, 2010
    -------------------------------------------------------------------------
                                                                     Natural
                            Light and                      Natural       Gas
    Company Interest           Medium    Heavy   Natural       Gas    Equiv-
    (Working plus           Crude Oil      Oil       Gas   Liquids     alent
     Royalty Interest)          (Mbbl)   (Mbbl)    (MMcf)    (Mbbl)   (MMcfe)
    -------------------------------------------------------------------------
    Proved Producing              625      338   187,223     1,397   201,380
    Proved Non-Producing            -        -    20,786       141    21,633
    Proved Undeveloped             92      128    22,990       513    27,390
    -------------------------------------------------------------------------
    Total Proved                  716      466   230,999     2,051   250,402
    -------------------------------------------------------------------------
    Probable Producing            207      161    62,515       510    67,776
    Probable Non-Producing
     excl GOB                       -      103    32,206       262    34,396
    Probable Undeveloped           46       86   103,309       644   107,961
    Probable Shut-in Gas over
     Bitumen                        -        -    27,196         -    27,196
    -------------------------------------------------------------------------
    Total Probable                253      349   225,225     1,415   237,329
    -------------------------------------------------------------------------
    Total Proved and Probable     969      816   456,224     3,467   487,731
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------

The proved producing reserves comprise 80 percent of the total proved
reserves and 41 percent of the total proved and probable reserves, while
proved and probable developed producing reserves are 55 percent of the total
proved and probable reserves. Total proved reserves account for 51 percent of
the total proved and probable reserves. McDaniel and GLJ have estimated the
FDC required to convert non-producing and undeveloped reserves to producing
reserves at $279.8 million.

    Reserves Reconciliation

        Company Interest (Working Interest + Royalty Interest)
    -------------------------------------------------------------------------
                                                                      Proved
    Natural Gas Equivalent (MMcfe)        Proved      Probable  and Probable
    -------------------------------------------------------------------------
    Opening Balance December 31, 2009    244,372       227,204       471,576
    Discoveries and Extensions            42,934        33,849        76,783
    Technical Revisions                   31,744        -4,332        27,442
    Acquisitions, net of Dispositions     11,243       -21,096        -9,853
    Production                           -55,933             0       -55,933
    Economic Factors                     -23,987         1,704       -22,283
    -------------------------------------------------------------------------
    Closing Balance December 31, 2010    250,402       237,329       487,731
    -------------------------------------------------------------------------

Perpetual disposed of 34.2 Bcfe (5.7 MMboe) of proved and probable
reserves associated with natural gas interests in the Legend, Liege and
Surmont areas that were shut-in as a result of the gas over bitumen
regulatory issue. Perpetual retained the effective funds flow from the
reduction of future royalties related to the financial solution in place for
the shut-in gas and this is reflected in proved future net revenues.

Year over year, McDaniel recorded net positive technical revisions
totaling 27.4 Bcfe (4.6 MMboe) on a proved and probable basis. These positive
revisions were due to improved performance and improved operating costs in
all areas. These positive revisions were offset by a substantially reduced
price forecast at year-end 2010 relative to year-end 2009 resulting in
negative revisions of 22.3 Bcfe (3.7 MMboe) due to increased economic limits
which primarily affected the forecast for wells as they neared their end of
productive life. Included in the downward price revisions are those future
projects whose return on investment at the current price forecast results is
negative.

The McDaniel price forecasts utilized in the evaluation of the majority
of Perpetual's assets are summarized below.

        McDaniel January 1, 2011 Price Forecast
    -------------------------------------------------------------------------
                    West Texas       Edmonton
                   Intermediate        Light         Natural         Foreign
                     Crude Oil      Crude Oil      Gas at AECO      Exchange
       Year          ($US/Bbl)      ($Cdn/Bbl)    ($Cdn/MMBtu)     ($US/$Cdn)
    -------------------------------------------------------------------------
       2011            85.00           84.20           4.25           0.975
       2012            87.70           88.40           4.90           0.975
       2013            90.50           91.80           5.40           0.975
       2014            93.40           94.80           5.90           0.975
       2015            96.30           97.70           6.35           0.975
       2016            99.40          100.90           6.75           0.975
       2017           101.40          102.90           7.10           0.975
       2018           103.40          104.90           7.40           0.975
       2019           105.40          107.00           7.60           0.975
       2020           107.60          109.20           7.75           0.975
       2021           109.70          111.30           7.85           0.975
       2022           111.90          113.60           8.05           0.975
       2023           114.10          115.80           8.20           0.975
       2024           116.40          118.10           8.40           0.975
     Escalate
    thereafter at          2%              2%             2%          0.975
    -------------------------------------------------------------------------

The GLJ price forecasts utilized in the evaluation of the Elmworth
Montney assets are summarized below.

        GLJ January 1, 2011 Price Forecast
    -------------------------------------------------------------------------
                    West Texas       Edmonton
                   Intermediate        Light         Natural         Foreign
                     Crude Oil      Crude Oil      Gas at AECO      Exchange
       Year          ($US/Bbl)      ($Cdn/Bbl)    ($Cdn/MMBtu)     ($US/$Cdn)
    -------------------------------------------------------------------------
       2011            88.00           86.22           4.16            0.98
       2012            89.00           89.29           4.74            0.98
       2013            90.00           90.92           5.31            0.98
       2014            92.00           92.96           5.77            0.98
       2015            95.17           96.19           6.22            0.98
       2016            97.55           98.62           6.53            0.98
       2017           100.26          101.39           6.76            0.98
       2018           102.74          103.92           6.90            0.98
       2019           105.45          106.68           7.06            0.98
       2020           107.56          108.84           7.21            0.98
     Escalate
    thereafter at          2%              2%             2%           0.98
    -------------------------------------------------------------------------

RESERVE LIFE INDEX ("RLI")

Perpetual's proved and probable reserves to production ratio, also
referred to as reserve life index, was 8.7 years at year-end 2010 while the
proved RLI was 4.9 years, based upon the 2011 production estimates in the
McDaniel and GLJ reports. The following table summarizes PET's historical
calculated RLI.

    Reserve Life Index(1)
    -------------------------------------------------------------------------
                            2010       2009       2008       2007       2006
    -------------------------------------------------------------------------
    Total Proved             4.9        4.8        4.5        4.7        3.6
    Proved and Probable      8.7        8.8        7.5        7.6        4.9
    -------------------------------------------------------------------------

    (1) Calculated as year-end reserves divided by year one production
        estimate from McDaniel and GLJ Reports.

NET PRESENT VALUE ("NPV") OF RESERVES SUMMARY

Perpetual's light and medium oil, natural gas and natural gas liquids
reserves were evaluated by McDaniel and GLJ using McDaniel's product price
forecast effective January 1, 2011 for all properties with the exception of
Elmworth which was evaluated using GLJ's product price forecasts effective
January 1, 2011, prior to provision for financial natural gas price hedges,
income taxes, interest, debt service charges and general and administrative
expenses. The following table summarizes the net present value of funds flows
from recognized reserves at January 1, 2011, assuming various discount rates.
It should not be assumed that the discounted future net funds flows estimated
by McDaniel and GLJ represent the fair market value of the potential future
production revenue of the company.

    NPV of Funds Flow Using McDaniel and GLJ January 1, 2011
    Forecast Prices and Costs
    -------------------------------------------------------------------------
                                                                  Discounted
    ($ thousands)        Undiscounted           5%          10%       at 15%
    -------------------------------------------------------------------------
    Proved Producing       $  784,904   $  630,014   $  532,180   $  463,874
    Proved Non-Producing       99,657       44,398       26,402       19,055
    Proved Undeveloped         57,236       36,027       23,183       14,679
    -------------------------------------------------------------------------
    Total Proved              941,797      710,439      581,765      497,608
    -------------------------------------------------------------------------
    Probable Producing        292,665      182,640      129,817       99,343
    Probable Non-Producing
     excl GOB                 125,062       85,908       65,021       51,664
    Probable Undeveloped      254,815      148,438       98,563       67,743
    Probable Shut-in Gas
     over Bitumen             105,907       73,644       52,952       39,142
    -------------------------------------------------------------------------
    Total Probable            758,555      490,630      346,353      257,892
    -------------------------------------------------------------------------
    Total Proved
     and Probable          $1,700,352   $1,201,069     $928,116     $755,500
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------

At a 10 percent discount factor, the proved producing reserves comprise
57 percent of the total proved and probable value while proved and probable
developed producing reserves represent 71 percent of the total proved and
probable value. Total proved reserves account for 63 percent of the proved
and probable value.

CONTINGENT RESOURCE

A resource assessment was conducted for the Montney Formation in the
Elmworth area by McDaniel as at year-end 2010. Perpetual has adjusted the
resource evaluation for the reserves recognized in the GLJ Supplemental
Reserve Report, removing lands assigned reserves from the contingent resource
evaluation, the results of which are summarized below.

    Contingent Resource(1,4)
    -------------------------------------------------------------------------
                                                                     Working
                                                                    Interest
                                                Recov-     Recov-     Recov-
                             Raw     Sales      erable     erable     erable
             Original     Recov-    Recov-     Natural    Natural    Natural
               Gas in     erable    erable         Gas        Gas        Gas
                Place      Gas(3)      Gas     Liquids  Equivalent Equivalent
                (MMcf)     (MMcf)    (MMcf)      (Mbbl)    (MMcfe)    (MMcfe)
    -------------------------------------------------------------------------
    Low(2)    809,420    161,884    137,600      4,857    166,740     78,316
    Best(2)   809,420    283,295    240,805     11,332    308,797    144,951
    High(2)   809,420    404,715    344,000     20,236    465,413    218,484
    -------------------------------------------------------------------------

    (1) Contingent resources have been evaluated by McDaniel using the
        definitions is as defined in section five of the Canadian Oil and Gas
        Evaluators Handbook, Volume 1. All volumes are reported before the
        deduction of royalties payable to others. Contingent resource
        assignments are in addition to any reserve assignments associated
        with these assets.

    (2) A Low estimate (90% chance the ultimate recoverable resource will be
        equal or greater than the stated value), means higher certainty, a
        Best estimate (50% chance that the ultimate recoverable resource will
        be greater than or equal to the stated value) means most likely and a
        High estimate means lower than a 50% chance that the ultimate
        recoverable resource will be greater than or equal to the stated
        value

    (3) McDaniel has assigned recovery factors of 20% (Low), 35% (Best) and
        50% (High) in their assessment of recoverable resource.

    (4) Contingent resources can be sub-classified into economic and
        uneconomic portions based on a number of assumptions on capital
        costs, timing, price forecast, etc. Currently sub-classification of
        these preliminary estimates has not been completed pending a
        discussion of the above parameters.

The primary contingencies identified for the Montney resource are
infrastructure and access to market. Once further development plans are in
place and as wells are drilled, it is expected that a further portion of
these estimates would shift into proved and probable reserves subject to
standard booking practices.

NET ASSET VALUE ("NAV")

The following net asset value table shows what is normally referred to as
a "produce-out" NAV calculation under which the Corporation's reserves would
be produced at forecast future prices and costs. The value is a snapshot in
time and is based on various assumptions including commodity prices and
foreign exchange rates that vary over time. It should not be assumed that the
NAV represents the fair market value of Perpetual shares. The calculations
below do not reflect the value of the Corporation's prospect inventory to the
extent that the prospects are not recognized within the NI-51-101 compliant
reserve assessment.

No reserves or contingent resources are yet assigned to any of
Perpetual's heavy oil/bitumen projects in northeast Alberta. The incremental
value of Perpetual's extensive prospect inventory for its game-changing
opportunities in the Montney at Elmworth, Cardium light oil at Carrot Creek,
Wilrich liquids-rich gas at Edson, the Colorado shallow shale gas in east
central Alberta and the bitumen projects in northeast Alberta, above the
amount which is currently recognized by McDaniel and GLJ, is captured only
through the assessment of the fair market value of undeveloped land based on
current land sale valuation parameters.

Of further note, the value of the Corporation's Warwick Gas Storage asset
has been recorded at cost in the net asset value calculation below. The
funding of the gas storage reservoir development in 2009 and 2010 as well as
the facility construction, through both debt and the forward sale obligation
related to WGSI's base cushion gas, offsets this value. Construction of the
Warwick Gas Storage facility was completed in the fourth quarter of 2010 and
withdrawal has now commenced on the preliminary test cycle which will be
complete at the end of March 2011. Information gathered during the test cycle
will define the developed working gas capacity of the storage reservoir at
that time. This in turn will lead to a more comprehensive valuation of the
asset.

    Pre-tax Net Asset Value at December 31, 2010(1)
    -------------------------------------------------------------------------
    ($ millions                                                   Discounted
     except as noted)    Undiscounted           5%           8%       at 10%
    -------------------------------------------------------------------------
    Total Proved and
     Probable Reserves(2)  $    1,700   $    1,201   $    1,021   $      928
    Fair Market Value of
     Undeveloped Land(3)          204          204          204          204
    Market Value of TriOil
     Resources Ltd. Shares          6            6            6            6
    Warwick Gas Storage(4)         65           65           65           65
    Net Bank Debt
     (unaudited)(5)              (206)        (206)        (206)        (206)
    Convertible Debentures
     (unaudited)                 (235)        (235)        (235)        (235)
    Estimate of Additional
     Future Abandonment and
     Reclamation Costs(6)        (110)         (63)         (46)         (38)
    Mark to McDaniel's
     cost of WGSI Forward
     Sale Obligation(7)           (40)         (34)         (31)         (29)
    -------------------------------------------------------------------------
    Net Asset Value        $    1,385   $      939   $      778   $      695
    -------------------------------------------------------------------------
    Shares Outstanding
     (million) - basic          148.3        148.3        148.3        148.3
    -------------------------------------------------------------------------
    Net Asset Value per
     Share ($/Share)       $     9.34   $     6.33   $     5.24   $     4.68
    -------------------------------------------------------------------------

    (1) Financial information is per Perpetual's 2010 preliminary unaudited
        consolidated financial statements.

    (2) Reserve values per McDaniel and GLJ Reports as at December 31, 2010.

    (3) Third party estimate.

    (4) Book value recorded at cost as at December 31, 2010.

    (5) Includes $10 million held in escrow at year-end relating to the
        Warwick Gas Storage facility funding arrangement.

    (6) Amounts are net of salvage value and in addition to amounts in the
        McDaniel and GLJ reports for future well abandonment costs related to
        developed reserves. See "ABANDONMENT AND RECLAMATION COSTS".

    (7) Value of Perpetual's open hedging transactions related to the Warwick
        Gas Storage funding arrangement at year end 2010 assuming settlement
        against the McDaniel price forecast.

The above evaluation includes future capital expenditure expectations
required to bring undeveloped reserves recognized by McDaniel and GLJ that
meet the criteria for booking under NI 51-101 on production.

FAIR MARKET VALUE OF UNDEVELOPED LAND

Perpetual's third party estimate of the fair market value of its
undeveloped acreage by region for purposes of the above net asset value
calculation is based on recent Crown land sale activity adjusted for tenure
and other considerations and is as follows.

    Fair Market Value of Undeveloped Land
    -------------------------------------------------------------------------
                                                         Total
    Area                                   Acres      Value ($)       $/Acre
    -------------------------------------------------------------------------
    North                              1,000,197   $41,042,433        $41.03
    South                                405,289    59,761,578        147.45
    West Central(1)                      140,082    66,445,075        474.33
    New Ventures                          25,350     8,607,925        339.56
    Heavy Oil                            333,259    27,809,494         83.45
    -------------------------------------------------------------------------
    Totals                             1,904,177  $203,666,505       $106.96
    -------------------------------------------------------------------------
    (1) Adjusted to reflect the Elmworth Montney reserve assignment by GLJ.

ABANDONMENT AND RECLAMATION COSTS

In addition to the abandonment cost estimates provided by McDaniel and
GLJ inclusive in their reserve assessment, Perpetual compiles annually a
detailed internal estimate of the Corporation's total future asset retirement
obligation based on net ownership interest in all wells, facilities and
pipelines, including estimated costs to abandon the wells, facilities and
pipelines and reclaim the sites, and the estimated timing of the costs to be
incurred in future periods. Pursuant to this evaluation, the estimated value
of Perpetual's future asset retirement obligations, net of the estimated
salvage value of facilities and equipment and discounted at 8 percent is $74
million
as at December 31, 2010. The McDaniel and GLJ reports includes an
undiscounted amount of $84 million with respect to expected future well
abandonment costs related specifically to proved and probable reserves and
such amount is included in the values captioned "Total Proved and Probable
Reserves" in the NPV of Funds Flow table (see "NET PRESENT VALUE ("NPV") OF
RESERVES SUMMARY"). Of the total future well abandonment costs included in
the McDaniel and GLJ reports an undiscounted amount of $56 million relates to
Perpetual's developed reserves. The following table presents the estimated
future asset retirement obligations and estimated net salvage values at
various discount rates:

    Abandonment and Reclamation Costs
    -------------------------------------------------------------------------
    ($ millions                                                   Discounted
     net to perpetual)   Undiscounted           5%           8%       at 10%
    -------------------------------------------------------------------------
    Well abandonment
     costs for developed
     reserves included
     in McDaniel and GLJ
     reports               $       56   $       35   $       28   $       24
    Well abandonment
     costs for
     undeveloped reserves
     included in McDaniel
     and GLJ reports               28           14           10            7
    -------------------------------------------------------------------------
    Well abandonment
     costs for Total
     Proved and Probable
     reserves included
     in McDaniel and GLJ
     reports                       84           49           37           31
    Estimate of other
     abandonment and
     reclamation costs not
     included in McDaniel
     and GLJ reports              231          136          103           86
    -------------------------------------------------------------------------
    Total estimated future
     abandonment and
     reclamation costs            315          186          140          117
    Salvage value                (148)         (88)         (66)         (55)
    -------------------------------------------------------------------------
    Abandonment and
     reclamation costs,
     net of salvage               167           98           74           62
    Well abandonment costs
     for developed reserves
     included in McDaniel
     and GLJ reports(1)           (56)         (35)         (28)         (24)
    -------------------------------------------------------------------------
    Estimate of additional
     future abandonment
     and reclamation
     costs, net of
     salvage(2)            $      110   $       63   $       46   $       38
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------

    (1) Note the well abandonment costs for developed reserves included in
        the McDaniel and GLJ reports previously incorrectly included the
        total developed and undeveloped well abandonment costs included in
        those reports.

    (2) Future abandonment and reclamation costs not included in the McDaniel
        and GLJ reports, net of salvage value.

FINDING, DEVELOPMENT AND ACQUISITION ("FD&A") COSTS

Under NI 51-101, the methodology to be used to calculate FD&A costs
includes incorporating changes in future development capital required to
bring the proved undeveloped and probable reserves to production. For
continuity, Perpetual has presented herein FD&A costs calculated both
excluding and including FDC. Changes in forecast FDC occur annually as a
result of development activities, acquisitions and disposition activities and
capital cost estimates that reflect the independent evaluator's best estimate
of what it will cost to bring the proved undeveloped and probable reserves on
production.

The following table summarizes Perpetual's F&D costs as well as finding,
development and acquisition costs, before and after the inclusion of changes
in FDC. Finding and development costs, including changes in FDC were $1.67
per Mcfe ($10.02 per BOE) on a proved and probable basis in 2010. F&D costs,
excluding changes in FDC were $1.39 per Mcfe ($8.34 per BOE) on a proved and
probable basis in 2010.

The same metrics are presented below with the impact of the sale of
probable shut-in gas over bitumen reserves in the Legend, Liege and Surmont
areas removed, as the dispositions are not comparable to other acquisitions
and dispositions since Perpetual retained the effective funds flow related to
the Government of Alberta's gas over bitumen financial solution through
royalty reductions associated with the shut-in properties. Including changes
in FDC, FD&A costs were $2.15 per Mcfe ($12.90 per BOE) on a proved and
probable basis. FD&A costs, excluding changes in FDC were $1.93 per Mcfe
($11.58 per BOE) on a proved and probable basis in 2010.

Perpetual has also summarized in the table below these same metrics with
the effect of the price-related revisions removed. Perpetual believes that
the majority of these reserves will return to the books with a recovery in
natural gas prices as the technical merits for booking the reserves have not
changed, only the economic circumstances. Excluding the effects of negative
reserve revisions related to substantially lower forward gas prices,
including changes in FDC, Perpetual's F&D costs were $1.31 per Mcfe ($7.86
per BOE) for proved and probable reserves and FD&A costs were $1.77 per Mcfe
($10.62 per BOE) in 2010 on a proved and probable basis.

    2010 FD&A Costs - Company Interest Reserves
    -------------------------------------------------------------------------
                                                                      Proved
                                                                   Excluding
                                                     Proved              GOB
                                                  Excluding    Disposition &
    ($millions (unaudited),                             GOB            Price
      except as noted)              Proved  Disposition(2,4)   Revisions(2,4)
    -------------------------------------------------------------------------
    F&D Costs, Excluding FDC
    Exploration and Development
     Capital Expenditures(1)        $114.0           $114.0           $114.0
    Reserve Additions Including
     Revisions - Bcfe                 50.7             50.7             74.7
    F&D - $/Mcfe(6)                  $2.25            $2.25            $1.53

    F&D Costs, Including FDC
    Exploration and Development
     Capital Expenditures(1)        $114.0           $114.0           $114.0
    Total Change in FDC              $(0.6)           $(0.6)           $(0.6)
    -------------------------------------------------------------------------
    Total F&D Capital including
     Change in FDC                  $114.2           $114.2           $114.2
    Reserve Additions Including
     Revisions - Bcfe                 50.7             50.7             74.7
    F&D Costs - $/Mcfe(6)            $2.24            $2.24            $1.52

    FD&A Costs, Excluding FDC
    Exploration and Development
     Capital Expenditures(1)        $114.0           $114.0           $114.0
    Net Acquisitions                 $51.3            $91.1            $91.1
    -------------------------------------------------------------------------
    FD&A Capital Including Net
     Acquisitions                   $165.3           $205.1           $205.1
    Reserve Additions Including
     Net Acquisitions - Bcfe          62.0             62.0             85.9
    FD&A Costs - $/Mcfe(6)           $2.67            $3.31            $2.39

    FD&A Costs, Including FDC
    FD&A Capital Including Net
     Acquisitions                   $165.3           $205.1           $205.1
    Total Change in FDC              $(0.6)           $(0.6)           $(0.6)
    -------------------------------------------------------------------------
    Total FD&A Capital
     Including Change in FDC        $165.5           $205.3           $205.3
    Reserve Additions Including
     Net Acquisitions - Bcfe          62.0             62.0             85.9
    FD&A Costs Including FDC
     - $/Mcfe(6)                     $2.66            $3.30            $2.38
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------

    -------------------------------------------------------------------------

                                                                  Proved and
                                                                    Probable
                                                 Proved and        Excluding
                                                   Probable              GOB
                                                  Excluding    Disposition &
                                  Proved &              GOB            Price
                                  Probable  Disposition(2,3) Revisions(2,3,5)
    -------------------------------------------------------------------------
    F&D Costs, Excluding FDC
    Exploration and Development
     Capital Expenditures(1)        $114.0           $114.0           $114.0
    Reserve Additions Including
     Revisions - Bcfe                 81.9             81.9            104.2
    F&D - $/Mcfe(6)                  $1.39            $1.39            $1.09

    F&D Costs, Including FDC
    Exploration and Development
     Capital Expenditures(1)        $114.0           $114.0           $114.0
    Total Change in FDC              $22.8            $22.8            $22.8
    -------------------------------------------------------------------------
    Total F&D Capital including
     Change in FDC                  $138.5           $138.5           $138.5
    Reserve Additions Including
     Revisions - Bcfe                 81.9             81.9            104.2
    F&D Costs - $/Mcfe(6)            $1.67            $1.67            $1.31

    FD&A Costs, Excluding FDC
    Exploration and Development
     Capital Expenditures(1)        $114.0           $114.0           $114.0
    Net Acquisitions                 $51.3            $91.1            $91.1
    -------------------------------------------------------------------------
    FD&A Capital Including Net
     Acquisitions                   $165.3           $205.1           $205.1
    Reserve Additions Including
     Net Acquisitions - Bcfe          72.1            106.3            128.6
    FD&A Costs - $/Mcfe(6)           $2.29            $1.93            $1.60

    FD&A Costs, Including FDC
    FD&A Capital Including Net
     Acquisitions                   $165.3           $205.1           $205.1
    Total Change in FDC              $22.8            $22.8            $22.8
    -------------------------------------------------------------------------
    Total FD&A Capital
     Including Change in FDC        $189.8           $229.6           $229.6
    Reserve Additions Including
     Net Acquisitions - Bcfe          72.1            106.3            128.6
    FD&A Costs Including FDC
     - $/Mcfe(6)                     $2.61            $2.15            $1.77
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------
    (1) $57.7 MM of capital associated with the Warwick Gas Storage project
        has been excluded, includes $14.2 MM of undeveloped land purchases
    (2) Disposition proceeds totaling $39.8 MM associated with the Legend,
        Liege and Surmont dispositions have been added back into the net
        acquisition capital.

    (3) 34.2 Bcf (5.7 MMboe) of probable reserves associated with the Legend,
        Liege and Surmont dispositions have been added back into the net
        acquired reserves.

    (4) 24.0 Bcf (6.0 MMboe) of proved reserves associated with price related
        revisions have been added back into the total reserve additions and
        revisions.

    (5) 22.3 Bcf (5.7 MMboe) of proved and probable reserves associated with
        price related revisions have been added back into the total reserve
        additions and revisions.

    (6) "Mcfe" may be misleading, particularly if used in isolation. An Mcfe
        conversion ratio of 1 bbl: 6 Mcf is based on an energy equivalency
        conversion method primarily applicable at the burner tip and does not
        represent a value equivalency at the wellhead.

Asset Disposition

Perpetual is also pleased to announce the sale of a minor, non-core
shallow gas property in northeast Alberta for $9.0 million. The effective
date of this sale is December 1, 2010. At year end, Perpetual had 3.7 Bcfe
(3.1 Bcf gas and 0.1 MMbbl oil) proved and probable reserves recorded for
this asset. The production impact of this sale is 2 MMcfe per day.

Forward-Looking Information

Certain information regarding Perpetual in this news release including
management's assessment of future plans and operations may constitute
forward-looking statements under applicable securities laws. The forward
looking information includes, without limitation, future dividends,
statements regarding estimated production and timing thereof, prospective
drilling, completions and development activities, estimated recoverable
contingent resources, estimates of gross recoverable gas sales, prospective
impact of the Montney development at Elmworth, estimated net asset value,
prospective oil and natural gas liquids production capability, commodity
prices, and gas price management. Various assumptions were used in drawing
the conclusions or making the forecasts and projections contained in the
forward-looking information contained in this press release, which
assumptions are based on management analysis of historical trends,
experience, current conditions and expected future developments pertaining to
Perpetual and the industry in which it operates as well as certain
assumptions regarding the matters outlined above. Forward-looking information
is based on current expectations, estimates and projections that involve a
number of risks, which could cause actual results to vary and in some
instances to differ materially from those anticipated by Perpetual and
described in the forward-looking information contained in this press release.
Undue reliance should not be placed on forward-looking information, which is
not a guarantee of performance and is subject to a number of risks or
uncertainties, including without limitation those described under "Risk
Factors" in Paramount Energy Trust's MD&A for the year ended December 31,
2009
and those included in reports on file with Canadian securities
regulatory authorities which may be accessed through the SEDAR website
(www.sedar.com) and at Perpetual's website (
www.perpetualenergyinc.com). Readers are cautioned that the foregoing
list of risk factors is not exhaustive. Forward-looking information is based
on the estimates and opinions of Perpetual's management at the time the
information is released and Perpetual disclaims any intent or obligation to
update publicly any such forward-looking information, whether as a result of
new information, future events or otherwise, other than as expressly required
by applicable securities law.

Non-GAAP Measures

This news release contains financial measures that may not be calculated
in accordance with generally accepted accounting principles in Canada
("GAAP"). Readers are referred to advisories and further discussion on
non-GAAP measures contained in the "Significant Accounting Policies and
Non-GAAP Measures" section of Paramount Energy Trust's Perpetual's
predecessor) MD&A for the year ended December 31, 2009.

Mcf equivalent (Mcfe) may be misleading, particularly if used in
isolation. In accordance with National Instrument 51-101 ("NI 51-101"), an
Mcfe conversion ratio for oil of 1 Bbl: 6 Mcf has been used, which is based
on an energy equivalency conversion method primarily applicable at the burner
tip and does not necessarily represent a value equivalency at the wellhead.

Perpetual Energy Inc. is a natural gas-focused Canadian energy company.
Perpetual's shares and Convertible Debentures are listed on the Toronto Stock
Exchange under the symbols "PMT", "PMT.DB.C", "PMT.DB.D" and "PMT.DB.E".
Further information with respect to Perpetual can be found at its website at
www.perpetualenergyinc.com.

The Toronto Stock Exchange has neither approved nor disapproved the
information contained herein.

PLEASE NOTE: All $ values are Canadian (CDN) unless otherwise stated.

For further information: For further information: Perpetual Energy Inc.,
Suite 3200, 605 - 5 Avenue SW, Calgary, Alberta, Canada, T2P 3H5, Telephone:
+1-403-269-4400, Fax: +1-403-269-4444, Email: info(at)perpetualenergyinc.com;
Susan L. Riddell Rose, President and Chief Executive Officer; Cameron R.
Sebastian
, Vice President, Finance and Chief Financial Officer; Sue M.
Showers
, Investor Relations and Communications Advisor

CO: Perpetual Energy Inc.

For further information: For further information: Perpetual Energy Inc.,
Suite 3200, 605 - 5 Avenue SW, Calgary, Alberta, Canada, T2P 3H5, Telephone:
+1-403-269-4400, Fax: +1-403-269-4444, Email: info(at)perpetualenergyinc.com;
Susan L. Riddell Rose, President and Chief Executive Officer; Cameron R.
Sebastian, Vice President, Finance and Chief Financial Officer; Sue M.
Showers, Investor Relations and Communications Advisor

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