EXHIBIT 99.1
                                                                    ------------


                    CHESAPEAKE ENERGY CORPORATION ANNOUNCES
          PROPOSED ACQUISITION OF MID-CONTINENT AND ARK-LA-TEX NATURAL
                  GAS PROPERTIES FROM BRG PETROLEUM CORPORATION
                                FOR $325 MILLION

      Transaction Will Include Production of 30 Mmcfe Per Day and 500 Bcfe
       of Internally Estimated Reserves, Consisting of 223 Bcfe of Proved
             Reserves and 277 Bcfe of Probable and Possible Reserves

    Acquisition Will Boost Chesapeake's Production Forecast by 2.8% for 2005
     and 4.3% for 2006 as Estimated Average Daily Production Should Increase
            by 35 Mmcfe Per Day in 2005 and 55 Mmcfe Per Day in 2006

OKLAHOMA  CITY,  OKLAHOMA,  DECEMBER  27, 2004 - Chesapeake  Energy  Corporation
(CHK:NYSE)  today  announced  that it has entered  into an  agreement to acquire
Tulsa-based  privately-held BRG Petroleum  Corporation and related  partnerships
for $325 million in cash. In this transaction,  Chesapeake anticipates acquiring
an internally  estimated 223 billion cubic feet of natural gas equivalent proved
reserves (bcfe),  277 bcfe of probable and possible  reserves and net production
of  approximately  30 million  cubic feet of natural gas  equivalent  production
(mmcfe) per day from 477 existing wells.

After  allocating  $71  million  of the  $325  million  purchase  price to BRG's
estimated  120,000 net acres of undeveloped  leasehold (and related probable and
possible reserves) and $5 million to mid-stream assets, Chesapeake's acquisition
cost for the 223 bcfe of internally  estimated proved reserves will be $1.12 per
thousand cubic feet of natural gas equivalent (mcfe).  Including $492 million of
anticipated future costs to fully develop the proved, probable and possible (3P)
reserves,  the company estimates that its all-in  acquisition cost for acquiring
and developing the 500 bcfe of 3P reserves should be $1.62 per mcfe based on the
company's projected  development plan and anticipated future drilling costs. The
BRG proved reserves have a reserves-to-production index of 20.3 years (9.7 years
excluding proved undeveloped  reserves),  are 93% gas, are 48% proved developed,
have  current  lease  operating  expenses  of  $0.53  per  mcfe  and will be 96%
Chesapeake-operated (by value).

BRG's properties are concentrated in the Mid-Continent  and Ark-La-Tex  regions.
In these  areas,  Chesapeake  has  identified  213  proved  undeveloped  and 420
probable and possible  locations on BRG's leasehold.  The drilling locations are
concentrated  in the Sahara gas resource  play in Northwest  Oklahoma and in the
East Texas Cotton Valley gas resource play in Nacogdoches County, Texas. Current
well  economics  in Sahara  involve  investing  $550,000 to develop an estimated
ultimate  recovery  (EUR) of 0.6 bcfe and current  Cotton  Valley  economics  in
Nacogdoches County involve investing $900,000 to develop an estimated EUR of 0.9
bcfe. Pro forma for this acquisition, Chesapeake expects that its proved oil and
natural gas reserves will increase to an internally estimated 4.8 trillion cubic
feet of natural gas equivalent (tcfe) as of December 31, 2004.

Through the use of two rigs in 2005 and four rigs in 2006, the company  believes
it can increase gas production on the acquired  properties from 30 mmcfe per day
at closing in February 2005 to 40 mmcfe per day in December 2005 and to 70 mmcfe
per day in December 2006. If these production increases are achieved, Chesapeake
estimates that its total average daily production in 2005 and 2006 will increase
by 35 and 55 mmcfe per day, respectively (see Chesapeake's updated Outlook as of
December 27, 2004 attached as Exhibit "A").  The company has hedged 67% of BRG's
current  gas  production  at NYMEX  gas  prices of $7.42 per mmbtu and $7.45 per
mmbtu  for 2005 and  2006,  respectively,  well  above  the gas  prices  used to
evaluate the property.

The BRG  acquisition  is expected to close on February 1, 2005 and is subject to
customary closing conditions and purchase price adjustments. The company intends
to  finance  the  acquisition  from  cash on hand and by using  its bank  credit
facility.  Chesapeake  expects to expand its bank credit  facility to $1 billion
and to extend the maturity of the facility to 2010.  BRG was advised in the sale
by Randall & Dewey of Houston, Texas.



                               MANAGEMENT COMMENT

Aubrey K. McClendon,  Chesapeake's Chief Executive Officer,  commented,  "We are
pleased to announce  today's  proposed  acquisition of BRG for several  reasons.
First, BRG will add to our very strong presence in the Mid-Continent, especially
in the Sahara  region of  Northwest  Oklahoma.  Since  establishing  our initial
Sahara position by acquiring 50,000 net leasehold acres through our acquisitions
of DLB Oil & Gas, Inc. and Hugoton  Energy  Corporation  in 1998, we now control
more than  500,000 net acres in Sahara.  To date,  we have drilled more than 600
wells in this area and believe we can drill approximately 2,500 additional wells
in the next 5-10 years,  providing  more than 1 tcfe of  potential  gas resource
upside to Chesapeake's  existing  approximate five tcfe of proved  reserves.  We
believe  Sahara  is one  of the  great  gas  resources  plays  in the  U.S.  and
fortunately  from a competitive  standpoint,  one of the least recognized by the
industry.

In addition, through BRG we will be building on Chesapeake's Ark-La-Tex position
that was initially  established  through our Greystone Petroleum LLC transaction
in June 2004. In that  transaction,  we acquired a  significant  interest in the
Sligo Field in North  Louisiana's  Bossier Parish. In just seven months, we have
increased  our net  production  on the property from 45 mmcfe per day to today's
rate of  approximately  60 mmcfe per day. In addition,  from an estimated proved
reserve base of 214 bcfe at the date of  acquisition,  we have already been able
to increase Greystone's proved reserves by approximately 10%.

In this latest Ark-La-Tex acquisition, Chesapeake will be acquiring 42,000 gross
(37,000 net) leasehold acres in the Naconiche Creek area of Nacogdoches  County,
Texas from BRG. During the past few years, BRG has drilled more than 75 wells in
this area to prove the commerciality of this promising gas resource play. We now
intend to  accelerate  further  development  of the field by  drilling  over 600
additional  wells that should  develop an average  estimated EUR of 0.9 bcfe per
well for a per well investment of $900,000.  After royalties,  our finding costs
should be approximately $1.25 per mcfe with virtually no dry-hole risk.

In the BRG  transaction,  as with all of our  acquisitions,  we are hopeful that
over time our reserve  estimates  will  increase  and that our well spacing will
decrease,  leading to significantly  higher recoverable reserves than originally
projected at the time of acquisition. We look forward to adding further value to
the attractive gas resource plays acquired from BRG in the years to come."

                    HALLWOOD TRANSACTION CLOSES AS SCHEDULED

On December 15, 2004,  Chesapeake closed its $292 million acquisition of Barnett
Shale properties from Dallas-based Hallwood Energy Corporation.  In the Hallwood
acquisition,  Chesapeake  acquired  Hallwood's 18,000 acre North Block assets in
Johnson County, Texas. Through this transaction, Chesapeake acquired 135 bcfe of
proved reserves,  145 bcfe of probable and possible  reserves and net production
of approximately 25 mcfe per day.  Chesapeake is currently utilizing two rigs to
further develop the North Block assets and is  participating  as non-operator in
two rigs operated by Hallwood that are operating on Hallwood's  South Block,  in
which Chesapeake owns a 44% working interest.


                                       2


THIS  PRESS  RELEASE  AND THE  ACCOMPANYING  OUTLOOKS  INCLUDE  "FORWARD-LOOKING
STATEMENTS"  WITHIN THE MEANING OF SECTION 27A OF THE SECURITIES ACT OF 1933 AND
SECTION 21E OF THE SECURITIES EXCHANGE ACT OF 1934.  FORWARD-LOOKING  STATEMENTS
GIVE OUR CURRENT  EXPECTATIONS  OR  FORECASTS  OF FUTURE  EVENTS.  THEY  INCLUDE
ESTIMATES OF OIL AND GAS RESERVES,  EXPECTED OIL AND GAS  PRODUCTION  AND FUTURE
EXPENSES, PROJECTIONS OF FUTURE OIL AND GAS PRICES, PLANNED CAPITAL EXPENDITURES
FOR DRILLING, LEASEHOLD ACQUISITIONS AND SEISMIC DATA, AND STATEMENTS CONCERNING
ANTICIPATED  CASH FLOW AND  LIQUIDITY,  BUSINESS  STRATEGY  AND OTHER  PLANS AND
OBJECTIVES FOR FUTURE OPERATIONS.  DISCLOSURES  CONCERNING  DERIVATIVE CONTRACTS
AND THEIR  ESTIMATED  CONTRIBUTION TO OUR FUTURE RESULTS OF OPERATIONS ARE BASED
UPON MARKET  INFORMATION AS OF A SPECIFIC DATE.  THESE MARKET PRICES ARE SUBJECT
TO SIGNIFICANT VOLATILITY.

FACTORS  THAT COULD CAUSE  ACTUAL  RESULTS TO DIFFER  MATERIALLY  FROM  EXPECTED
RESULTS ARE  DESCRIBED  UNDER "RISK  FACTORS" IN OUR EXCHANGE  OFFER  PROSPECTUS
DATED  NOVEMBER  30, 2004 (AS AMENDED ON  DECEMBER  16,  2004) WE FILED WITH THE
SECURITIES  AND  EXCHANGE  COMMISSION  ON DECEMBER  20,  2004.  THEY INCLUDE THE
VOLATILITY OF OIL AND GAS PRICES;  ADVERSE EFFECTS OUR SUBSTANTIAL  INDEBTEDNESS
AND PREFERRED STOCK  OBLIGATIONS COULD HAVE ON OUR OPERATIONS AND FUTURE GROWTH;
OUR  ABILITY TO  COMPETE  EFFECTIVELY  AGAINST  STRONG  INDEPENDENT  OIL AND GAS
COMPANIES  AND MAJORS;  POSSIBLE  FINANCIAL  LOSSES AND  SIGNIFICANT  COLLATERAL
REQUIREMENTS  AS A  RESULT  OF  OUR  COMMODITY  PRICE  AND  INTEREST  RATE  RISK
MANAGEMENT  ACTIVITIES;  UNCERTAINTIES  INHERENT IN ESTIMATING QUANTITIES OF OIL
AND GAS  RESERVES,  INCLUDING  RESERVES WE ACQUIRE;  PROJECTING  FUTURE RATES OF
PRODUCTION  AND THE TIMING OF  DEVELOPMENT  EXPENDITURES;  EXPOSURE TO POTENTIAL
LIABILITIES  OF  ACQUIRED  PROPERTIES  AND  COMPANIES;  OUR  ABILITY  TO REPLACE
RESERVES; THE AVAILABILITY OF CAPITAL; WRITEDOWNS OF OIL AND GAS CARRYING VALUES
IF COMMODITY PRICES DECLINE; ENVIRONMENTAL AND OTHER CLAIMS IN EXCESS OF INSURED
AMOUNTS RESULTING FROM DRILLING AND PRODUCTION  OPERATIONS;  AND THE LOSS OF KEY
PERSONNEL.  WE CAUTION YOU NOT TO PLACE UNDUE RELIANCE ON THESE  FORWARD-LOOKING
STATEMENTS,  WHICH  SPEAK  ONLY AS OF THE  DATE OF THIS  PRESS  RELEASE,  AND WE
UNDERTAKE NO OBLIGATION TO UPDATE THIS INFORMATION.

OUR  PRODUCTION  FORECASTS  ARE  DEPENDENT  UPON  MANY  ASSUMPTIONS,   INCLUDING
ESTIMATES OF PRODUCTION  DECLINE RATES FROM EXISTING  WELLS AND THE  UNDERTAKING
AND OUTCOME OF FUTURE  DRILLING  ACTIVITY,  WHICH MAY BE AFFECTED BY SIGNIFICANT
COMMODITY  PRICE  DECLINES  OR  DRILLING  COST  INCREASES.  ALSO,  OUR  INTERNAL
ESTIMATES  OF  RESERVES,  PARTICULARLY  THOSE IN THE  PROPERTIES  PROPOSED TO BE
ACQUIRED  WHERE  WE MAY  HAVE  LIMITED  REVIEW  OF DATA OR  EXPERIENCE  WITH THE
RESERVES,  MAY BE SUBJECT TO REVISION AND MAY BE DIFFERENT FROM ESTIMATES BY OUR
EXTERNAL RESERVOIR ENGINEERS AT YEAR-END.  ALTHOUGH WE BELIEVE THE EXPECTATIONS,
ESTIMATES AND FORECASTS REFLECTED IN THESE AND OTHER FORWARD-LOOKING  STATEMENTS
ARE  REASONABLE,  WE CAN GIVE NO ASSURANCE THEY WILL PROVE TO HAVE BEEN CORRECT.
THEY CAN BE AFFECTED BY INACCURATE  ASSUMPTIONS  AND DATA OR BY KNOWN OR UNKNOWN
RISKS AND UNCERTAINTIES.

THE SEC HAS GENERALLY PERMITTED OIL AND GAS COMPANIES,  IN FILINGS MADE WITH THE
SEC, TO DISCLOSE ONLY PROVED RESERVES THAT A COMPANY HAS  DEMONSTRATED BY ACTUAL
PRODUCTION  OR  CONCLUSIVE  FORMATION  TESTS  TO  BE  ECONOMICALLY  AND  LEGALLY
PRODUCIBLE UNDER EXISTING  ECONOMIC AND OPERATING  CONDITIONS.  WE USE THE TERMS
"PROBABLE" AND "POSSIBLE"  RESERVES OR OTHER DESCRIPTIONS OF VOLUMES OF RESERVES
POTENTIALLY OR ULTIMATELY  RECOVERABLE  THROUGH ADDITIONAL  DRILLING OR RECOVERY
TECHNIQUES  THAT THE SEC'S  GUIDELINES MAY PROHIBIT US FROM INCLUDING IN FILINGS
WITH  THE SEC.  THESE  ESTIMATES  ARE BY  THEIR  NATURE  MORE  SPECULATIVE  THAN
ESTIMATES  OF PROVED  RESERVES  AND  ACCORDINGLY  ARE  SUBJECT TO  SUBSTANTIALLY
GREATER RISK OF BEING ACTUALLY REALIZED BY THE COMPANY.

CHESAPEAKE  ENERGY  CORPORATION  IS THE SIXTH  LARGEST  INDEPENDENT  PRODUCER OF
NATURAL GAS IN THE U.S. HEADQUARTERED IN OKLAHOMA CITY, THE COMPANY'S OPERATIONS
ARE FOCUSED ON EXPLORATORY  AND  DEVELOPMENTAL  DRILLING AND PRODUCING  PROPERTY
ACQUISITIONS IN THE MID-CONTINENT,  PERMIAN BASIN, SOUTH TEXAS, TEXAS GULF COAST
AND ARK-LA-TEX  REGIONS OF THE UNITED STATES.  THE COMPANY'S INTERNET ADDRESS IS
WWW.CHKENERGY.COM.


                                       3



                                  SCHEDULE "A"

                  CHESAPEAKE'S OUTLOOK AS OF DECEMBER 27, 2004

Quarter Ending December 31, 2004; Year Ending December 31, 2004;
Year Ending December 31, 2005; Year Ending December 31, 2006.

We have adopted a policy of  periodically  providing  investors with guidance on
certain factors that affect our future financial performance. As of December 27,
2004, we are using the  following key  assumptions  in our  projections  for the
fourth quarter of 2004, the full-year 2004, the full-year 2005 and the full-year
2006.

We expect  to record  non-operating  losses  in Q4 2004 in  connection  with our
pending cash tender offer for our $209.8 million of 8.375% senior notes due 2008
and our pending offer to exchange our 6.0%  convertible  preferred stock for our
common  stock.  If we purchase all of our 8.375%  senior  notes  pursuant to the
tender offer, we estimate that an after-tax loss on the early  redemption of the
notes  of $12  million  will be  recorded  in Q4 2004  as an  adjustment  to net
earnings.  If all our 6.0%  preferred  stock is exchanged for common  stock,  we
estimate  that a  loss  on the  early  conversion  of  the  preferred  stock  of
approximately  $37 million  will be  reflected  as an  adjustment  to net income
available to common  shareholders for the purpose of calculating  basic earnings
per share in Q4 2004.

The primary changes from our November 30, 2004 Outlook are in italicized bold in
the table and are explained as follows:

     1)   We have updated our previous production forecasts for 2005 and 2006 to
          reflect increases in production of 35 mmcfe per day in 2005 (excluding
          January)  and 55 mmcfe  per day in 2006 as a result  of the  announced
          acquisition of BRG Petroleum Corporation. This increases our full-year
          2005 production forecast by 2.8% to a mid-point of 1,190 mmcfe per day
          and our 2006 production forecast by 4.3% to a mid-point of 1,325 mmcfe
          per day.

     2)   We have increased capital expenditures by $50 million in 2005 and $100
          million in 2006 to reflect planned increased drilling activity planned
          on the BRG and other company properties.

     3)   We have  updated the  projected  effects  from  changes in our hedging
          positions since our November 30, 2004 Outlook.

     4)   We have included our  expectations for future NYMEX oil and gas prices
          to illustrate hedging effects only.




                                        4


                                                          Quarter Ending     Year Ending       Year Ending      Year Ending
                                                          DECEMBER 31,      DECEMBER 31,      DECEMBER 31,     DECEMBER 31,
                                                          -------------     -------------     -------------    ------------
                                                               2004              2004             2005              2006
                                                               ----              ----             ----              ----

ESTIMATED PRODUCTION:
                                                                                                   
  Oil - Mbo                                                   1,588             6,560             6,600            6,600
  Gas - Bcf                                                88.5 - 89.5        317 - 319         391 - 399        438 - 448
  Gas Equivalent - Bcfe                                      98 - 99          356 - 358         430 - 438        478 - 488
  Daily gas equivalent midpoint -in Mmcfe                     1,069              975              1,190            1,325

NYMEX PRICES
 (FOR CALCULATION OF REALIZED HEDGING EFFECTS ONLY):
  Oil - $/Bo                                                  $46.67            $41.00           $40.00            $40.00
  Gas - $/Mcf                                                 $6.60             $6.01             $6.00            $6.00

ESTIMATED DIFFERENTIALS TO NYMEX PRICES:
  Oil - $/Bo                                                  -$2.75            -$2.65           -$2.75            -$2.75
  Gas - $/Mcf                                                 -$0.75            -$0.70           -$0.70            -$0.70

ESTIMATED REALIZED HEDGING EFFECTS
 (BASED ON EXPECTED NYMEX PRICES ABOVE):
  Oil - $/Bo                                                 -$15.85           -$10.19            $0.06            $0.00
  Gas - $/Mcf                                                 -$0.53            -$0.23            $0.05            -$0.01

OPERATING COSTS PER MCFE OF PROJECTED PRODUCTION:
  Production expense                                       $0.57 - 0.62      $0.57 - 0.62     $0.62 - 0.67      $0.68 - 0.72
  Production taxes (generally 7% of O&G revenues)          $0.40 - 0.44      $0.28 - 0.33     $0.38 - 0.40      $0.38 - 0.40
  General and administrative                               $0.10 - 0.11      $0.10 - 0.11     $0.10 - 0.11      $0.11 - 0.12
  Stock based compensation (non-cash)                      $0.02 - 0.04      $0.02 - 0.04     $0.04 - 0.06      $0.09 - 0.10
  DD&A - oil and gas                                       $1.65 - 1.70      $1.60 - 1.65     $1.75 - 1.80      $1.80 - 1.90
  Depreciation of other assets                             $0.08 - 0.10      $0.08 - 0.10     $0.09 - 0.11      $0.10 - 0.12
  Interest expense(a)                                      $0.45 - 0.49      $0.45 - 0.49     $0.43 - 0.47      $0.43 - 0.47
Other Income and Expense per Mcfe:
  Marketing and other income                               $0.02 - 0.04      $0.02 - 0.04     $0.02 - 0.04      $0.02 - 0.04

BOOK TAX RATE                                                  36%               36%               36%              36%

EQUIVALENT SHARES OUTSTANDING:
  Basic                                                       279 mm            254 mm           313 mm            316 mm
  Diluted                                                     347 mm            327 mm           351 mm            354 mm

CAPITAL EXPENDITURES:
  Drilling, leasehold and seismic                         $300 - $325 mm   $1,100 - $1,150      $1,300 -      $1,450 - $1,550
                                                                                  mm            $1,400 mm            mm


     (a)  Does not include  gains or losses on interest rate  derivatives  (SFAS
          133).


        COMMODITY HEDGING ACTIVITIES

          The  company  utilizes  hedging  strategies  to hedge  the  price of a
          portion  of its  future  oil  and  gas  production.  These  strategies
          include:

           (i)   For swap  instruments,  we receive a fixed price for the hedged
                 commodity and pay a floating  market price,  as defined in each
                 instrument,  to the counterparty.  The fixed-price  payment and
                 the  floating-price  payment  are  netted,  resulting  in a net
                 amount due to or from the counterparty.

           (ii)  For  cap-swaps,  Chesapeake  receives a fixed  price and pays a
                 floating  market price.  The fixed price received by Chesapeake
                 includes  a  premium  in  exchange  for a  "cap"  limiting  the
                 counterparty's  exposure.  In other words, there is no limit to
                 Chesapeake's  exposure  but  there is a limit  to the  downside
                 exposure of the counterparty.

           (iii) Basis protection swaps are arrangements  that guarantee a price
                 differential  of oil or gas from a  specified  delivery  point.
                 Chesapeake  receives  a payment  from the  counterparty  if the
                 price  differential  is greater  than the  stated  terms of the
                 contract and pays the counterparty if the price differential is
                 less than the stated terms of the contract.


                                        5


          Commodity markets are volatile, and as a result,  Chesapeake's hedging
          activity is dynamic.  As market  conditions  warrant,  the company may
          elect to settle a hedging  transaction prior to its scheduled maturity
          date and, as a result, lock in the gain or loss on the transaction.

          Chesapeake enters into oil and natural gas derivative  transactions in
          order to mitigate a portion of its exposure to adverse  market changes
          in oil and natural gas prices. Accordingly,  associated gains or loses
          from the derivative  transactions  are reflected as adjustments to oil
          and gas sales.  All realized gains and losses from oil and natural gas
          derivatives  are included in oil and gas sales in the month of related
          production.  Pursuant to SFAS 133, certain  derivatives do not qualify
          for  designation  as cash flow  hedges.  Changes  in the fair value of
          these  non-qualifying  derivatives  that occur prior to their maturity
          (i.e.  because  of  temporary  fluctuations  in  value)  are  reported
          currently in the  consolidated  statement of  operations as unrealized
          gains (losses) within oil and gas sales.

          Following  provisions  of SFAS  133,  changes  in the  fair  value  of
          derivative  instruments  designated as cash flow hedges, to the extent
          effective in offsetting  cash flows  attributable  to hedged risk, are
          recorded  in other  comprehensive  income  until  the  hedged  item is
          recognized  in  earnings.  Any  change in fair  value  resulting  from
          ineffectiveness is recognized currently in oil and natural gas sales.

The company currently has in place the following natural gas swaps:


                                                                          % Hedged
                                                                 ---------------------------
                               Avg.                  Avg. NYMEX                  Open Swap
                              NYMEX                   Price                    Positions as
                              Strike                 Including      Assuming      a % of
                    Open      Price     Gain (Loss)  Open and        Gas        Estimated
                    Swaps     of Open   from Locked    Locked      Production    Total Gas
                   in Bcf's    Swaps       Swaps       Positions   in Bcf's of:  Production
                  ---------   -------   ----------   -----------   ------------- -----------

2004:
- -----
                                                                   
1st Qtr              69.5     $5.94        $0.03         $5.97         70.1          99%
2nd Qtr              62.2     $5.15        $0.00         $5.15         76.5          81%
3rd Qtr(1)           70.7     $5.49       -$0.09         $5.40         83.2          85%
4th Qtr(1)           76.5     $5.88       -$0.11         $5.77         89.0          86%
- --------------------------------------------------------------------------------------------
Total 2004          278.9     $5.63       -$0.05         $5.58        318.8          88%
============================================================================================
============================================================================================
2005:
- -----
1st Qtr              62.4     $6.91       -$0.11         $6.80         93.4          67%
2nd Qtr              38.5     $6.05       -$0.27         $5.78         97.5          39%
3rd Qtr              34.5     $6.06       -$0.31         $5.75        100.8          34%
4th Qtr              23.5     $6.20       -$0.46         $5.74        103.0          23%
============================================================================================
Total 2005(1)       158.9     $6.41       -$0.24         $6.17        394.7          40%
============================================================================================

============================================================================================
Total 2006(1)        39.3     $6.77       -$0.62         $6.15        443.0           9%
============================================================================================

============================================================================================
Total 2007(2)          -         -            -             -         470.0           -
============================================================================================

============================================================================================
TOTALS
- --------------------------------------------------------------------------------------------
2005-2007           198.2     $6.48       -$0.31         $6.17      1,307.7          15%
============================================================================================


     (1)  CERTAIN  HEDGING  ARRANGEMENTS  INCLUDE  SWAPS  WITH  KNOCKOUT  PRICES
          RANGING FROM $3.50 TO $5.25 COVERING 25.4 BCF IN 2004,  $3.75 TO $5.50
          COVERING  60.2 BCF IN 2005 AND  $3.75  TO $5.50  COVERING  28.4 BCF IN
          2006.

     (2)  SWAPS COVERING 25.6 BCF HAVE BEEN LOCKED FOR 2007. THIS WILL RESULT IN
          THE  RECOGNITION  OF $11.6  MILLION OF LOSSES IN 2007 WHEN THE HEDGING
          ARRANGEMENTS SETTLE.

     NOTE:  NOT  SHOWN  ABOVE  ARE  COLLARS  COVERING  1.1  BCF  AND  4.4 BCF OF
     PRODUCTION  IN Q4 2004 AND IN 2005,  RESPECTIVELY,  AT A  WEIGHTED  AVERAGE
     FLOOR AND CEILING OF $3.10 AND $4.44.  IN ADDITION,  CALL OPTIONS  COVERING
     10.2 BCF AND 7.3 BCF OF  PRODUCTION  IN Q4 2004  AND IN 2005 AT A  WEIGHTED
     AVERAGE PRICE OF $6.31 AND $6.00 ARE NOT INCLUDED IN THE TABLE ABOVE.

                                        6



THE COMPANY HAS ALSO ENTERED  INTO THE  FOLLOWING  NATURAL GAS BASIS  PROTECTION
SWAPS:




                                                                 Assuming Gas
                                                              Production in Bcf's
                        Volume in Bcf's       NYMEX less:             of:             %Hedged
                       ----------------    ----------------   -------------------    --------
                                                                          
2004                         157.4                0.17               318.8              49%
2005                         188.6                0.26               394.7              48%
2006                         130.1                0.32               443.0              29%
2007                         126.5                0.28               470.0              27%
2008                         118.6                0.27               495.0              24%
2009                          86.6                0.29               520.0              17%
                       ----------------    ----------------   -------------------     -------
Totals                       807.8          $     0.26             2,641.5              31%
                       ================    ================   ===================    ========


* weighted average


The company has entered into the following crude oil hedging arrangements:


                                                           % Hedged
                                              ---------------------------------
                                                 Assuming        Open Swap
                                       Avg.         Oil         Positions as
                          Open        NYMEX      Production     % of Total
                        Swaps in      Strike      in mbo's      Estimated
                         mbo's        Price         of:         Production
                        --------     -------     ----------     ------------

Q1 - 2004                1,270       $28.58        1,465           87%
Q2 - 2004                1,540       $30.00        1,673           92%
Q3 - 2004(1)             1,519       $30.32        1,834           83%
Q4 - 2004(1)             1,518       $30.10        1,588           96%
- -------------------------------------------------------------------------------
Total 2004(1)            5,847       $29.80        6,560           89%
                 ==============================================================
                 ==============================================================
Q1 - 2005                  855       $41.76        1,650           52%
Q2 - 2005                  865       $41.63        1,650           52%
Q3 - 2005                  138       $31.16        1,650            8%
Q4 - 2005                  138       $30.62        1,650            8%
- -------------------------------------------------------------------------------

Total 2005(1)            1,996       $40.20        6,600           30%
                 ==============================================================


     (1)  CERTAIN  HEDGING  ARRANGEMENTS  INCLUDE  SWAPS  WITH  KNOCKOUT  PRICES
          RANGING FROM $21.00 TO $26.00  COVERING 2,240 MBO IN 2004 AND KNOCKOUT
          PRICES RANGING FROM $26.00 TO $34.00 COVERING 1,996 MBO IN 2005.


                                        7


                                  SCHEDULE "B"

              CHESAPEAKE'S PREVIOUS OUTLOOK AS OF NOVEMBER 30, 2004
                          (PROVIDED FOR REFERENCE ONLY)

                NOW SUPERSEDED BY OUTLOOK AS OF DECEMBER 27, 2004

Quarter Ending  December 31, 2004;  Year Ending  December 31, 2004;  Year Ending
December 31, 2005; Year Ending December 31, 2006.

We have adopted a policy of  periodically  providing  investors with guidance on
certain factors that affect our future financial performance. As of November 30,
2004, we are using the  following key  assumptions  in our  projections  for the
fourth quarter of 2004, the full-year 2004, the full-year 2005 and the full-year
2006.

The primary  changes from our November 1, 2004 Outlook are in italicized bold in
the table and are explained as follows:

     1)   We have updated our previous production forecasts for 2005 and 2006 to
          reflect  increases  in  production  of 40 mmcfe per day in 2005 and 70
          mmcfe  per day in 2006 as a result  of the  announced  acquisition  of
          Hallwood  Energy  Corporation.   This  increases  our  full-year  2005
          production  forecast by 3.6% to a mid-point of 1,155 mmcfe per day and
          our 2006 production forecast by 5.8% to a mid-point of 1,270 mmcfe per
          day.

     2)   We have increased capital  expenditures by $50 million in each of 2005
          and  2006  to  reflect  increased  drilling  activity  planned  on the
          Hallwood  North  Block  property.

     3)   We have  updated the  projected  effects  from  changes in our hedging
          positions since our November 1, 2004 Outlook.

     4)   We have included our  expectations for future NYMEX oil and gas prices
          to illustrate  hedging  effects  only.

     5)   We have  adjusted  equivalent  shares  outstanding  to  reflect i) the
          conversion of our 6.75% preferred stock into common shares on November
          22, 2004, ii) a recent private  exchange of 600,000 shares of our 6.0%
          preferred  stock for 3.225 million of our common shares,  and iii) our
          pending tender offer to exchange our remaining  6.0%  preferred  stock
          for an estimated 21.2 million common shares.

                                        8





                                                             QUARTER ENDING     YEAR ENDING       YEAR ENDING       Year Ending
                                                              DECEMBER 31,     DECEMBER 31,      DECEMBER 31,      DECEMBER 31,
                                                              -------------    -------------     -------------     ------------
                                                                  2004              2004              2005             2006
                                                                  ----              ----              ----             ----
ESTIMATED PRODUCTION:
                                                                                                       
  Oil - Mbo                                                       1,588            6,560             6,600             6,600
  Gas - Bcf                                                    88.5 - 89.5       317 - 319         379 - 387         418 - 428
  Gas Equivalent - Bcfe                                          98 - 99         356 - 358         418 - 426         458 - 468
  Daily gas equivalent midpoint - in Mmcfe                        1,069             975              1,155             1,270

NYMEX PRICES
 (FOR CALCULATION OF REALIZED HEDGING EFFECTS ONLY):
  Oil - $/Bo                                                      $46.67           $41.00            $40.00           $36.00
  Gas - $/Mcf                                                     $6.60            $6.01             $6.00             $6.00

ESTIMATED DIFFERENTIALS TO NYMEX PRICES:
  Oil - $/Bo                                                     -$2.75            -$2.65            -$2.75           -$2.75
  Gas - $/Mcf                                                    -$0.75            -$0.70            -$0.70           -$0.70

ESTIMATED REALIZED HEDGING EFFECTS
 (BASED ON EXPECTED NYMEX PRICES ABOVE):
  Oil - $/Bo                                                        -$15.85          -$10.19             $0.06             $0.00
  Gas - $/Mcf                                                        -$0.53           -$0.23             $0.05            -$0.01

OPERATING COSTS PER MCFE OF PROJECTED PRODUCTION:
  Production expense                                          $0.57 - 0.62      $0.57 - 0.62      $0.62 - 0.67     $0.68 - 0.72
  Production taxes (generally 7% of O&G revenues)             $0.40 - 0.44      $0.28 - 0.33      $0.38 - 0.40     $0.38 - 0.40
  General and administrative                                  $0.10 - 0.11      $0.10 - 0.11      $0.10 - 0.11     $0.11 - 0.12
  Stock based compensation (non-cash)                         $0.02 - 0.04      $0.02 - 0.04      $0.04 - 0.06     $0.09 - 0.10
  DD&A - oil and gas                                          $1.65 - 1.70      $1.60 - 1.65      $1.65 - 1.75     $1.75 - 1.85
  Depreciation of other assets                                $0.08 - 0.10      $0.08 - 0.10      $0.09 - 0.11     $0.10 - 0.12
  Interest expense(a)                                         $0.45 - 0.49      $0.45 - 0.49      $0.43 - 0.47     $0.43 - 0.47
Other Income and Expense per Mcfe:
  Marketing and other income                                  $0.02 - 0.04      $0.02 - 0.04      $0.02 - 0.04     $0.02 - 0.04

BOOK TAX RATE                                                      36%              36%               36%               36%

EQUIVALENT SHARES OUTSTANDING:
  Basic                                                          279 mm            254 mm            313 mm           316 mm
  Diluted                                                        347 mm            327 mm            351 mm           354 mm

CAPITAL EXPENDITURES:
  Drilling, leasehold and seismic                            $300 - $325 mm   $1,100 - $1,150   $1,250 - $1,350      $1,350 -
                                                                                     mm                mm            $1,450 mm


(a) Does not include gains or losses on interest rate derivatives (SFAS 133).

                                       9



Commodity Hedging Activities

     The company utilizes hedging  strategies to hedge the price of a portion of
     its future oil and gas production. These strategies include:


         (i)      For swap instruments,  we receive a fixed price for the hedged
                  commodity and pay a floating  market price, as defined in each
                  instrument,  to the counterparty.  The fixed-price payment and
                  the  floating-price  payment  are netted,  resulting  in a net
                  amount due to or from the counterparty.

         (ii)     For  cap-swaps,  Chesapeake  receives a fixed price and pays a
                  floating market price.  The fixed price received by Chesapeake
                  includes  a  premium  in  exchange  for a "cap"  limiting  the
                  counterparty's  exposure. In other words, there is no limit to
                  Chesapeake's  exposure  but  there is a limit to the  downside
                  exposure of the counterparty.

         (iii)    Basis protection swaps are arrangements that guarantee a price
                  differential  of oil or gas from a specified  delivery  point.
                  Chesapeake  receives a payment  from the  counterparty  if the
                  price  differential  is greater  than the stated  terms of the
                  contract and pays the  counterparty if the price  differential
                  is less than the stated terms of the contract.


     Commodity  markets  are  volatile,  and as a result,  Chesapeake's  hedging
     activity is dynamic. As market conditions warrant, the company may elect to
     settle a hedging transaction prior to its scheduled maturity date and, as a
     result, lock in the gain or loss on the transaction.

     Chesapeake enters into oil and natural gas derivative transactions in order
     to mitigate a portion of its exposure to adverse  market changes in oil and
     natural  gas  prices.  Accordingly,  associated  gains  or  loses  from the
     derivative  transactions are reflected as adjustments to oil and gas sales.
     All  realized  gains and losses from oil and natural  gas  derivatives  are
     included in oil and gas sales in the month of related production.  Pursuant
     to SFAS 133,  certain  derivatives  do not qualify for  designation as cash
     flow hedges. Changes in the fair value of these non-qualifying  derivatives
     that occur prior to their maturity (i.e. because of temporary  fluctuations
     in  value)  are  reported  currently  in  the  consolidated   statement  of
     operations as unrealized gains (losses) within oil and gas sales.

     Following  provisions of SFAS 133,  changes in the fair value of derivative
     instruments  designated  as cash flow  hedges,  to the extent  effective in
     offsetting  cash flows  attributable  to hedged risk, are recorded in other
     comprehensive  income until the hedged item is recognized in earnings.  Any
     change in fair value resulting from ineffectiveness is recognized currently
     in oil and natural gas sales.

                                       10


     The company currently has in place the following natural gas swaps:




                                                                          % Hedged
                                                                 ---------------------------
                               Avg.                  Avg. NYMEX                  Open Swap
                              NYMEX                   Price                    Positions as
                              Strike                 Including      Assuming      a % of
                    Open      Price     Gain (Loss)  Open and        Gas        Estimated
                    Swaps     of Open   from Locked    Locked      Production    Total Gas
                   in Bcf's    Swaps       Swaps       Positions   in Bcf's of:  Production
                  ---------   -------   ----------   -----------   ------------- -----------

2004:
                                                                   
1st Qtr              69.5     $5.94         $0.03        $5.97         70.1          99%
2nd Qtr              62.2     $5.15         $0.00        $5.15         76.5          81%
3rd Qtr(1)           70.7     $5.49        -$0.09        $5.40         83.2          85%
4th Qtr(1)           76.5     $5.88        -$0.11        $5.77         89.0          86%
- ---------------------------------------------------------------------------------------------
Total 2004          278.9     $5.63        -$0.05        $5.58        318.8          88%
=============================================================================================

=============================================================================================
2005:
- -----
1st Qtr              60.6     $6.89        -$0.11        $6.78         91.5          66%
2nd Qtr              34.9     $5.97        -$0.30        $5.67         94.5          37%
3rd Qtr              30.8     $5.96        -$0.35        $5.61         97.5          32%
4th Qtr              21.6     $6.10        -$0.50        $5.60         99.5          22%
=============================================================================================
Total 2005(1)       147.9     $6.36        -$0.26        $6.10        383.0          39%
=============================================================================================

=============================================================================================
Total 2006(1)(2)     32.0     $6.62        -$0.76        $5.86        423.0           8%
=============================================================================================

=============================================================================================
Total 2007(2)         -          -             -            -         450.0            -
=============================================================================================

=============================================================================================
TOTALS
- ---------------------------------------------------------------------------------------------
2005-2007           179.9     $6.41        -$0.35        $6.06      1,256.0          14%
=============================================================================================



     (1)  Certain  hedging  arrangements  include  swaps  with  knockout  prices
          ranging from $3.50 to $5.25 covering 25.4 bcf in 2004,  $3.75 to $5.00
          covering  52.9 bcf in 2005 and  $3.75  to $5.25  covering  21.1 bcf in
          2006.

     (2)  Swaps covering 25.6 bcf have been locked for 2007. This will result in
          the  recognition  of $11.6  million of losses in 2007 when the hedging
          arrangements settle.

     Note:  Not  shown  above  are  collars  covering  1.1  bcf  and  4.4 bcf of
     production  in Q4 2004 and in 2005,  respectively,  at a  weighted  average
     floor and ceiling of $3.10 and $4.44.  In addition,  call options  covering
     10.2 bcf and 7.3 bcf of  production  in Q4 2004  and in 2005 at a  weighted
     average price of $6.31 and $6.00 are not included in the table above.


                                       11



The company has also entered  into the  following  natural gas basis  protection
swaps:



                                                                 Assuming Gas
                                                              Production in Bcf's
                        Volume in Bcf's       NYMEX less:             of:             %Hedged
                       ----------------     ----------------   -------------------    --------
                                                                          
2004                         157.4               0.17                318.8               49%
2005                         186.1               0.26                383.0               49%
2006                         124.1               0.31                423.0               29%
2007                         118.7               0.27                450.0               26%
2008                         108.0               0.25                475.0               23%
2009                          80.3               0.28                500.0               16%
                       ----------------     ----------------   -------------------    --------
Totals                       774.6          $    0.25              2,549.8               30%
                       ================     ================   ===================    ========


* weighted average

The company has entered into the following crude oil hedging arrangements:

                                                           % Hedged
                                              ---------------------------------
                                                 Assuming        Open Swap
                                       Avg.         Oil         Positions as
                          Open        NYMEX      Production     % of Total
                        Swaps in      Strike      in mbo's      Estimated
                         mbo's       Price          of:         Production
                        --------     ------     -----------     ------------

Q1 - 2004                1,270       $28.58         1,465          87%
Q2 - 2004                1,540       $30.00         1,673          92%
Q3 - 2004(1)             1,519       $30.32         1,834          83%
Q4 - 2004(1)             1,518       $30.10         1,588          96%
- -------------------------------------------------------------------------------
Total 2004(1)            5,847       $29.80         6,560          89%
                 ===============================================================
Q1 - 2005                  855       $41.76         1,650          52%
Q2 - 2005                  865       $41.63         1,650          52%
Q3 - 2005                  138       $31.16         1,650           8%
Q4 - 2005                  138       $30.62         1,650           8%
- --------------------------------------------------------------------------------

Total 2005(1)            1,996       $40.20         6,600          30%
                 ===============================================================


     (1)  Certain  hedging  arrangements  include  swaps  with  knockout  prices
          ranging from $21.00 to $26.00  covering 2,240 mbo in 2004 and knockout
          prices ranging from $26.00 to $34.00 covering 1,996 mbo in 2005.

                                       12