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


           CHESAPEAKE ENERGY CORPORATION POSTS STRONG RESULTS FOR THE
                2004 SECOND QUARTER AND ANNOUNCES $590 MILLION OF
          NATURAL GAS ACQUISITIONS IN THE MID-CONTINENT AND SOUTH TEXAS

           COMPANY REPORTS 2004 SECOND QUARTER NET INCOME AVAILABLE TO
          COMMON SHAREHOLDERS OF $86 MILLION ON REVENUE OF $574 MILLION
   AND PRODUCTION OF 86.5 BCFE; CONTINUING PRODUCTION GAINS FROM THE DRILLBIT
                AND FROM ACQUISITIONS DRIVE FORECASTS HIGHER FOR
                        SECOND HALF OF 2004 AND FOR 2005

   NEWLY ANNOUNCED ACQUISITIONS PROVIDE 310 BCFE OF ESTIMATED PROVED RESERVES,
   453 BCFE OF ESTIMATED PROBABLE AND POSSIBLE RESERVES, 50,000 NET LEASEHOLD
      ACRES AND PRODUCTION OF 60 MMCFE PER DAY; ASSETS ARE 92% NATURAL GAS
         AND ARE LOCATED 56% IN THE MID-CONTINENT AND 44% IN SOUTH TEXAS


OKLAHOMA CITY,  OKLAHOMA,  JULY 26, 2004 - Chesapeake Energy  Corporation (NYSE:
CHK) today  reported its  financial  and  operating  results for the 2004 second
quarter.  For the quarter,  Chesapeake  generated net income available to common
shareholders of $85.8 million ($0.31 per fully diluted common share),  operating
cash flow of $308.2  million  (defined  as cash flow from  operating  activities
before changes in assets and  liabilities) and ebitda of $324.1 million (defined
as income before income taxes, interest expense, and depreciation, depletion and
amortization expense) on revenue of $574.3 million.

The company's  2004 second quarter net income  available to common  shareholders
and ebitda include an unrealized  after-tax  mark-to-market loss of $7.1 million
($0.02 per fully  diluted  common  share)  resulting  from the company's oil and
natural  gas and  interest  rate  hedging  programs.  This is an item  typically
excluded from analysts' estimates.

If such item is excluded,  Chesapeake's net income to common shareholders in the
2004  second  quarter  would have been $92.9  million  ($0.33 per fully  diluted
common  share) and ebitda  would have been  $344.2  million.  This item does not
affect the calculation of operating cash flow.

         OIL AND NATURAL GAS PRODUCTION AND PROVED RESERVES SET RECORDS


Production  for the 2004 second  quarter was 86.5 billion  cubic feet of natural
gas  equivalent  (bcfe),  an increase of 19.2 bcfe,  or 29%,  over the 67.3 bcfe
produced in the 2003 second  quarter and an increase of 7.6 bcfe,  or 10%,  over
the 78.9 bcfe produced in the 2004 first quarter. The 19.2 bcfe increase in this
year's second quarter production over 2003 second quarter  production  consisted
of 7.7 bcfe generated from organic  drillbit growth and 11.5 bcfe generated from
acquisitions.  Chesapeake's  organic  growth  rate during the past 12 months has
therefore been 11%, well above the company's  forecasted  organic growth rate of
5% and among the very best organic growth  performances  reported by public mid-
and large-cap E&P companies in the past several years. In addition,  the balance
between Chesapeake's growth through the drillbit and growth through acquisitions
reflects the successful execution of the company's balanced growth strategy.

The 2004 second quarter's  production of 86.5 bcfe was comprised of 76.5 billion
cubic feet of natural gas (bcf) (88% on a natural gas equivalent basis) and 1.67
million  barrels of oil and  natural  gas  liquids  (mmbo) (12% on a natural gas
equivalent  basis).  Chesapeake's  average daily production rate for the quarter
was 951  million  cubic  feet of  natural  gas  equivalent  production  (mmcfe),
consisting of 841 mmcf of gas and 18,385 barrels of oil and natural gas liquids.
The 2004 second quarter was Chesapeake's 12th consecutive  quarter of sequential
production  growth.  During  these  12  quarters,  Chesapeake's  production  has
increased  121%, for an average  compound  quarterly  growth rate of 6.8% and an
average annualized growth rate of 30%.

Average prices realized during the 2004 second quarter (including realized gains
or losses from oil and gas derivatives, but excluding unrealized gains or losses
on such  derivatives)  were $28.12 per barrel of oil (bo) and $4.87 per thousand
cubic feet of natural gas (mcf),  for a realized gas  equivalent  price of $4.85
per thousand cubic feet of natural gas equivalent (mcfe).  Chesapeake's  average
realized pricing differentials to NYMEX during the quarter were a negative $2.19
per bo and a  negative  $0.68 per mcf.  Realized  gains or losses  from  hedging
activities  generated  a $7.70 loss per bo and a $0.56 loss per mcf,  for a 2004
second quarter realized  hedging loss of $55.3 million,  or $0.64 per mcfe. This
contrasts  with $25.7 million,  or $0.33 per mcfe, of realized  hedging gains in
the 2004 first quarter.

During the 2004 second quarter, the company replaced its 86.5 bcfe of production
with an  internally  estimated  429 bcfe of new proved  reserves,  for a reserve
replacement  rate of 496% at a drilling and acquisition  cost of $1.52 per mcfe.
Reserve  replacement  through the  drillbit was 143 bcfe,  or 165%,  and reserve
replacement through acquisitions was 286 bcfe, or 331%. At the end of the second
quarter,  Chesapeake`s estimated proved reserves were 3.8 trillion cubic feet of
natural gas equivalent (tcfe) (4.1 tcfe pro forma for the acquisitions announced
today).


      KEY OPERATIONAL AND FINANCIAL STATISTICS FOR THE 2004 SECOND QUARTER

The table below summarizes  Chesapeake's  key statistics  during the 2004 second
quarter and compares them to the 2004 first quarter and the 2003 second quarter:


                                                       THREE MONTHS ENDED:
                                                      -------------------


                                                 6/30/04    03/31/04    06/30/03
                                                 -------    --------    -------
Average daily production (in mmcfe)                 951        867       740
Gas as % of total production                         88         89        89
Natural gas production (in bcf)                    76.5       70.1      60.0
Average realized gas price ($/mcf) (a)             4.87       5.62      4.73
Oil production (in mbbls)                         1,673      1,465     1,224
Average realized oil price ($/bo) (a)             28.12      27.10     26.24
Natural gas equivalent production (in bcfe)        86.5       78.9      67.3
Gas equivalent realized price ($/mcfe) (a)         4.85       5.50      4.70
General and administrative costs ($/mcfe) (e)       .09        .10       .08
Production taxes ($/mcfe)                           .26        .19 (d)   .25
Lease operating expenses ($/mcfe)                   .57        .57       .51
Interest expense ($/mcfe) (a)                       .44        .48       .56
DD&A of oil and gas properties ($/mcfe)            1.58       1.52      1.36
Operating cash flow ($ in millions) (b)           308.2      333.6     226.1
Operating cash flow ($/mcfe)                       3.56       4.23      3.36
Ebitda ($ in millions) (c)                        324.1      348.1     266.4
Ebitda ($/mcfe)                                    3.74       4.41      3.96
Net income to common shareholders                  85.8      104.4      76.3
 ($ in millions)

     (a)  includes the effects of realized  gains or (losses) from hedging,  but
          does not  include  the effects of  unrealized  gains or (losses)  from
          hedging
     (b)  defined as cash flow provided by operating  activities  before changes
          in assets and liabilities
     (c)  defined  as  income  before  income  taxes,   interest  expense,   and
          depreciation, depletion and amortization expense
     (d)  includes  pre-tax  benefit of $6.8  million,  or $0.09 per mcfe,  from
          prior period severance tax credits
     (e)  excludes expenses associated with non-cash stock based compensation

     CHESAPEAKE ANNOUNCES $590 MILLION OF COMPLETED OR PENDING ACQUISITIONS,
     ACQUIRING 310 BCFE OF ESTIMATED PROVED RESERVES, 453 BCFE OF ESTIMATED
              PROBABLE AND POSSIBLE RESERVES, 50,000 NET LEASEHOLD
                     ACRES AND 60 MMCFE OF DAILY PRODUCTION


Chesapeake  announced that it has entered into agreements to acquire natural gas
assets in the  Mid-Continent  and South Texas regions through  transactions with
three private companies. The transactions involve the acquisition of Tulsa-based
Bravo Natural  Resources,  Inc., the acquisition of substantially all the assets
of Houston-based Legend Natural Gas, LP and the acquisition of substantially all
the assets of Oklahoma City-based Tilford Pinson Exploration, LLC.

Bravo's  assets  consist of 20,000 acres  located in the Granite  Wash-producing
Stiles  Ranch and  Allison  Britt  fields of the  Anadarko  Basin in Wheeler and
Hemphill Counties, Texas and Roger Mills County, Oklahoma. The Granite Wash is a
Pennsylvanian-aged  formation  located at depths of 12-13,000' on Bravo's 20,000
net acres of leasehold.  The Granite Wash, and the deeper Cherokee/Atoka Washes,
to date have  produced  more than 1.2 tcfe from 10 major  fields in the Anadarko
Basin and are currently  the subject of intense  industry  drilling  programs in
western  Oklahoma  and in the  Texas  Panhandle.  Chesapeake  now has more  than
200,000 net acres of potentially prospective leasehold in areas where well costs
currently  average  $1.2-1.5  million,  estimated  per well  reserve  recoveries
average 1.5-2.0 bcfe and drainage areas average  approximately  40 acres.  Bravo
was  formed in early 2003 by Charles  R.  Stephenson,  John H. Hale and  Irving,
Texas-based  Natural Gas Partners VI, L.P. The  transaction is expected to close
on August 2, subject to satisfaction of customary closing conditions.  Bravo was
advised in its sale to Chesapeake by Petrie Parkman & Co.

                                       2

Legend's  producing  assets and 18,000 net acres of leasehold are located in the
Roleta,  Haynes,  Comitas and En Seguido  fields in the Zapata County portion of
South Texas.  The primary  zones of production in these fields are various sands
of the Middle and Lower Wilcox formations at depths ranging from  7,000-13,000'.
The majority of Legend's  assets are located  approximately  3-7 miles south and
east of the Zapata County assets Chesapeake acquired in October 2003 from Laredo
Energy LP. At the time of  acquisition  by  Chesapeake,  the Laredo  assets were
producing  30 mmcfe per day net to  Chesapeake's  interest.  After  better  than
expected  drilling results,  the Laredo assets are currently  producing 50 mmcfe
per day,  a 67%  increase  in just nine  months.  Zapata  County is Texas'  most
prolific  natural gas  producing  county.  Upon closing the Legend  transaction,
Chesapeake will be the fourth largest gas producer in Zapata County.  Legend was
formed  in 2001 by  James  A.  Winne,  III,  Michael  Becci  and New  York-based
Riverstone  Holdings  LLC.  The  transaction  is expected to close on August 31,
subject to satisfaction of customary closing  conditions.  Legend was advised in
its sale to Chesapeake by Goldman, Sachs & Co.

Tilford Pinson's  producing assets and 12,000 net acres of leasehold are located
primarily in the Arkoma Basin fields of Northwest  Scipio,  Northwest  Reams and
South Pine Hollow in Pittsburg  County,  Oklahoma.  Major zones of production in
these fields range from 2,500 foot  Hartshorne  sands to 6,000 - 8,000' Cromwell
and Caney Shale plays.  The Cromwell and Caney Shale formations are particularly
active and the Caney Shale is  considered  by some  industry  observers  to have
similar  characteristics  to the  Barnett  Shale.  By  virtue  of  its  drilling
activities in the past six years and the completion of the Oxley  acquisition in
May 2003,  Chesapeake  has become the largest gas producer in Pittsburg  County,
Oklahoma's  eighth  largest gas producing  county.  Tilford Pinson was formed in
1995 by Max Tilford and Dave Pinson. The transaction closed earlier this month.

Through these three transactions, Chesapeake anticipates acquiring an internally
estimated  310 bcfe of proved  reserves,  an  internally  estimated  453 bcfe of
probable and possible  reserves and current  production of 60 mmcfe per day. Pro
forma for these acquisitions, the company's estimated proved oil and natural gas
reserves as of June 30, 2004 would have been approximately 4.1 tcfe.  Chesapeake
believes it can  increase the newly  acquired  properties'  production  from the
current  rate of 60 mmcfe per day to at least 90 mmcfe per day by year-end  2005
and at least 120 mmcfe per day by year-end  2006.  The  company  has  identified
approximately 210 proved  undeveloped and 410 probable and possible locations on
the 50,000 net  leasehold  acres being  acquired in the  transactions  announced
today.

After  allocating  approximately  $190  million  of the  combined  $590  million
purchase price to unevaluated leasehold and mid-stream gas assets,  Chesapeake's
acquisition  cost per mcfe of proved reserves will be $1.29.  Including the $190
million of  unevaluated  leasehold and  mid-stream gas assets value and the $690
million of  anticipated  future  drilling  costs  necessary to fully develop the
proved,  probable and possible  reserves,  the company estimates that its all-in
cost to develop the 763 bcfe of reserves acquired in the three transactions will
be  $1.68  per  mcfe.  Chesapeake  believes  this  is a very  attractive  all-in
acquisition price,  especially given the industry's present finding costs, which
the company believes are currently over $2.00 per mcfe and are likely to rise in
the foreseeable future.

The acquired proved reserves have a reserves-to-production  index of 14.2 years,
are 92% gas, 97%  company-operated,  35% proved developed and have current lease
operating  expenses  of only  $0.29 per  mcfe.  These  very low lease  operating
expenses  (approximately  60%  per  mcfe  below  the  industry  average)  create
unusually  high  economic  values  per mcfe of  proved  reserves  and add to the
attractiveness of Chesapeake's all-in acquisition cost of $1.68 per mcfe.

The company  intends to finance the $590  million of new  acquisitions  using an
approximate 50/50 combination of senior notes and common stock issuance.

                                       3

  OPERATIONAL RESULTS CONTINUE TO EXCEED EXPECTATIONS, STRONG DRILLING RESULTS
    AND SIGNIFICANT LEASEHOLD ADDITIONS LEAD TO INCREASED ESTIMATES OF 5,000
           UNDRILLED LOCATIONS AND THREE TCFE OF UNDEVELOPED RESERVES


Chesapeake's  exploratory and development  drilling  programs and its production
enhancement  operations on its base and recently acquired properties continue to
produce operational results that exceed the company's forecasts. During the 2004
second  quarter,  Chesapeake  drilled  134 gross (96.6 net)  operated  wells and
participated in another 187 gross wells (24.5 net) operated by other  companies.
The company's drilling success rate was 98% for  company-operated  wells and 99%
for non-operated  wells.  Chesapeake invested $149 million in operated wells and
$52 million in non-operated wells.

During the quarter, the company invested $101 million in acquiring new leasehold
and 3-D seismic  data as it  continued to make  significant  investments  in the
building  blocks of future  organic  growth.  In addition to adding  significant
leasehold to its existing dominant positions in Bray, Mayfield, Sahara and other
ongoing   Anadarko  and  Arkoma  Basin   projects,   Chesapeake  also  has  been
aggressively building  industry-leading  leasehold positions in the Granite Wash
and Cherokee/Atoka Wash gas resource plays in the Anadarko Basin  (approximately
200,000  prospective acres), in the Hartshorne Coal and Caney Shale gas resource
plays of the Arkoma Basin  (approximately  75,000  prospective acres) and in the
Barnett Shale gas resource play in North Texas (approximately 30,000 prospective
acres in Johnson County).  The company believes it has built the largest onshore
U.S.  inventories  of leasehold and 3-D seismic in the industry (more than three
million and eight million  acres,  respectively)  and believes it has identified
more than 5,000 undrilled locations which could contain up to approximately four
tcfe of probable and possible undeveloped reserves.

     STRONG OPERATIONAL RESULTS LEAD TO ANOTHER INCREASE IN 2004 PRODUCTION
           FORECASTS AND TO A STRONG INITIAL 2005 PRODUCTION FORECAST


Chesapeake is today  increasing its 2004 mid-point  production  forecast by 10.0
bcfe (2.9%) to a range of 353-355 bcfe (967 mmcfe per day at the mid-point) from
a range of 341-347 (940 mmcfe per day at the mid-point).  Approximately 8.8 bcfe
of this 10.0 bcfe increase is  attributable  to anticipated  production from the
three new  transactions  while 1.2 bcfe is  attributable to better than expected
recent  drilling  results.  This is the third time in 2004 that  Chesapeake  has
increased its production forecasts, each time from a combination of acquisitions
and better  than  expected  drilling  results.  The company  forecasts  that its
organic growth rate will be at least 10% in 2004.

Chesapeake now estimates that its third quarter 2004  production will range from
91.5 to 92.5 bcfe (1,000 mmcfe per day at the midpoint)  and its fourth  quarter
2004  production  will  range  from 96 to 97 bcfe  (1,049  mmcfe  per day at the
midpoint).  Chesapeake's  average  daily  production  in the second half of 2004
(1,024 mmcfe per day at the  midpoint) is expected to exceed  production  in the
second  half of 2003 (784 mmcfe per day) by  approximately  240  mmcfe,  or 31%.
Furthermore,  Chesapeake  believes that its  production  will  continue  growing
during 2005 and will range  between 390 and 400 bcfe (1,082 mmcfe per day at the
midpoint), a 12% increase over the midpoint of forecasted 2004 production.

         CHESAPEAKE TAKES ADVANTAGE OF RECENT NATURAL GAS PRICE WEAKNESS
                 AND LIFTS SOME OF ITS NATURAL GAS PRICE HEDGES

Chesapeake  took  advantage  of  natural  gas price  weakness  during the second
quarter and lifted all of its hedges for 2006 and 2007  natural  gas  production
and  decreased  its hedged  natural gas  positions by 10% for the second half of
2004 and 39% for 2005.  The  following  tables  compare  Chesapeake's  projected
2004-2007  oil and natural gas  production  volumes  that have been hedged as of
July 26, 2004 to what had been previously hedged as of May 11, 2004.

                                       4

                      HEDGED POSITIONS AS OF JULY 26, 2004
                               Oil                    Natural Gas
                     -----------------------    -----------------------
Quarter or Year      % Hedged      $ NYMEX      % Hedged      $ NYMEX
- ---------------      ---------     --------     ---------     --------
2004 1Q                 87%          $28.58           99%       $5.97
2004 2Q                 92%          $30.00           81%       $5.15
2004 3Q                 95%          $30.32           68%       $5.25
2004 4Q                 95%          $30.10           40%       $5.12
- ---------------      --------      --------     ---------     --------
2004 Total              92%          $29.80           71%       $5.41
===============      ========      ========     =========     ========
2005                     9%          $31.56           17%       $4.74
2006                      -             -              -          -
2007                      -             -              -          -


                       HEDGED POSITIONS AS OF MAY 11, 2004
                               Oil                    Natural Gas
                     -----------------------    -----------------------
Quarter or Year      % Hedged      $ NYMEX      % Hedged      $ NYMEX
- ---------------      ---------     --------     ---------     --------
2004 1Q                 87%          $28.58           99%       $5.97
2004 2Q                100%          $30.00           81%       $5.11
2004 3Q                 96%          $30.32           73%       $5.28
2004 4Q                 95%          $30.10           48%       $5.27
- ---------------      --------      --------     ---------     ---------
2004 Total              95%          $29.80           74%       $5.44
===============      ========      ========     =========     =========
2005                     9%          $31.56           28%       $5.12
2006                      -             -             10%       $4.88
2007                      -             -              7%       $4.76


Depending  on changes in oil and natural gas  futures  markets and  management's
view of underlying oil and natural gas supply and demand trends,  Chesapeake may
either  increase or decrease  its  hedging  positions  at any time in the future
without notice.

The company's  updated 2004  forecasts and initial 2005 forecast are attached to
this  release in an Outlook  dated July 26,  2004  labeled  Schedule  "A".  This
Outlook has been  changed  from the  Outlook  dated May 11,  2004  (attached  as
Schedule "B" for investors' convenience) to reflect today's increased production
forecasts and the projected effects from the hedging position changes.

                               MANAGEMENT COMMENTS

Aubrey K. McClendon,  Chesapeake's Chief Executive Officer, commented,  "Today's
announcements  of very strong  operational  and  financial  results for the 2004
second  quarter and of three new  value-creating  acquisitions  provide  ongoing
confirmation that Chesapeake continues to execute with precision on its business
strategy.  This  strategy  focuses  on  delivering  growth  through a balance of
acquisitions and organic drilling,  focusing on natural gas to take advantage of
strong long-term supply/demand fundamentals and building dominant regional scale
to achieve  low  operating  costs and high  returns on  capital.  This  business
strategy has worked very well for our shareholders, generating a 1,525% increase
in our  common  stock  price  since  January 1,  1999.  We believe  Chesapeake's
management  team  can  continue  the  successful   execution  of  the  company's
"distinctive" business strategy and continue to deliver significant  shareholder
value in the years ahead."

                                       5

                           CONFERENCE CALL INFORMATION

A conference call has been scheduled for Tuesday morning,  July 27, 2004 at 9:00
a.m. EDT to discuss this earnings  release.  The telephone  number to access the
conference  call  is  913.981.5572.  For  those  unable  to  participate  in the
conference  call, a replay will be available  from 12:00 p.m. EDT, July 27, 2004
through midnight EDT on August 9, 2004. The number to access the conference call
replay is 719.457.0820 and the passcode is 151543. The conference call will also
be simulcast  live on the Internet and can be accessed at  WWW.CHKENERGY.COM  by
selecting "Conference Calls" under the "Investor Relations" section. The webcast
of the conference call will be available on the website for one year.


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 PROSPECTUS  DATED JULY 8, 2004
FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 12, 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 OUTCOME OF
FUTURE DRILLING  ACTIVITY.  ALTHOUGH WE BELIEVE THE  EXPECTATIONS  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 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  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.

THE ANNOUNCEMENT OF PROPOSED  FINANCINGS THROUGH THE ISSUANCE OF EQUITY AND DEBT
IN THIS PRESS RELEASE SHALL NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF
AN  OFFER  TO BUY  ANY  SECURITIES.  THE  DEBT  SECURITIES  WILL  LIKELY  NOT BE
REGISTERED  UNDER THE SECURITIES ACT OF 1933 OR ANY STATE  SECURITIES  LAWS, AND
MAY NOT BE  OFFERED  OR SOLD IN THE  UNITED  STATES  ABSENT  REGISTRATION  OR AN
APPLICABLE  EXEMPTION FROM THE  REGISTRATION  REQUIREMENTS OF THE SECURITIES ACT
AND STATE LAWS.

CHESAPEAKE  ENERGY  CORPORATION  IS ONE OF THE  FIVE  LARGEST  INDEPENDENT  U.S.
NATURAL GAS PRODUCERS.  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.

                                       6




                                           CHESAPEAKE ENERGY CORPORATION
                                       CONSOLIDATED STATEMENTS OF OPERATIONS
                                        ($ IN 000'S, EXCEPT PER SHARE DATA)
                                                   (UNAUDITED)
====================================================================================================================
THREE MONTHS ENDED:                                                 JUNE 30, 2004              JUNE 30, 2003
                                                                $               $/mcfe        $            $/mcfe
                                                             -----------   ------------   ------------   -----------
REVENUES:
                                                                                             

  OIL AND GAS SALES                                             399,665           4.62        319,519          4.74
  OIL AND GAS MARKETING SALES                                   174,627           2.02        110,296          1.64
                                                             ----------    ------------   -----------    ----------
    TOTAL REVENUES                                              574,292           6.64        429,815          6.38
                                                             ----------    ------------   -----------    ----------

OPERATING COSTS:
  PRODUCTION EXPENSES                                            49,595           0.57         34,263          0.51
  PRODUCTION TAXES                                               22,751           0.26         17,101          0.25
  GENERAL AND ADMINISTRATIVE EXPENSES:
    GENERAL AND ADMINISTRATIVE (EXCLUDING STOCK BASED
    COMPENSATION)                                                 7,420           0.09          5,635          0.08
    STOCK BASED COMPENSATION                                        672           0.01            365          0.01
  OIL AND GAS MARKETING EXPENSES                                171,115           1.98        106,857          1.59
  OIL AND GAS DEPRECIATION, DEPLETION, AND AMORTIZATION         136,743           1.58         91,570          1.36
                                                                106,857
  DEPRECIATION AND AMORTIZATION OF OTHER ASSETS                   6,716           0.08          4,122          0.06
                                                             ----------    ------------   -----------    ----------
    TOTAL OPERATING COSTS                                       395,012           4.57        259,913          3.86
                                                             ----------    ------------   -----------    ----------

INCOME FROM OPERATIONS                                          179,280           2.07        169,902          2.52
                                                             ----------    ------------   -----------    ----------

OTHER INCOME (EXPENSE):
  INTEREST AND OTHER INCOME                                       1,335           0.01            781          0.01
  INTEREST EXPENSE                                              (28,806)         (0.33)       (38,036)        (0.56)
                                                             ----------    ------------   -----------    ----------
    TOTAL OTHER INCOME (EXPENSE)                                (27,471)         (0.32)       (37,255)        (0.55)
                                                             ----------    ------------   -----------    ----------

INCOME BEFORE INCOME TAXES                                      151,809           1.75        132,647          1.97

INCOME TAX EXPENSE:
  CURRENT                                                            --             --             --            --
  DEFERRED                                                       54,654           0.63         50,407          0.75
                                                             ----------    ------------   -----------    ----------
    TOTAL INCOME TAX EXPENSE                                     54,654           0.63         50,407          0.75
                                                             ----------    ------------   -----------    ----------

NET INCOME                                                       97,155           1.12         82,240          1.22

PREFERRED STOCK DIVIDENDS                                       (11,344)         (0.13)        (5,979)        (0.09)
                                                             ----------   ------------    -----------    ----------

NET INCOME AVAILABLE TO COMMON SHAREHOLDERS                      85,811           0.99         76,261          1.13
                                                             ==========    ============   ===========    ==========
- --------------------------------------------------------------------------------------------------------------------
EARNINGS PER COMMON SHARE:

   BASIC                                                     $     0.36                   $      0.36
                                                             ==========                   ===========
   ASSUMING DILUTION                                         $     0.31                   $      0.31
                                                             ==========                   ===========

WEIGHTED AVERAGE COMMON AND COMMON
 EQUIVALENT SHARES OUTSTANDING (IN 000'S)

  BASIC                                                         241,147                       214,341
                                                             ==========                   ===========
  ASSUMING DILUTION                                             303,483                       263,919
                                                             ==========                   ===========


                                       7



                                           CHESAPEAKE ENERGY CORPORATION
                                       CONSOLIDATED STATEMENTS OF OPERATIONS
                                        ($ IN 000'S, EXCEPT PER SHARE DATA)
                                                   (UNAUDITED)
====================================================================================================================
SIX MONTHS ENDED:                                                   JUNE 30, 2004              JUNE 30, 2003
                                                                $               $/mcfe      $               $/mcfe
                                                             -----------   -------------  ------------   -----------
REVENUES:
                                                                                             
  OIL AND GAS SALES                                             819,458            4.95       605,538          4.88
  OIL AND GAS MARKETING SALES                                   317,963            1.92       200,604          1.62
                                                             ----------    ------------   -----------    ----------
    TOTAL REVENUES                                            1,137,421            6.87       806,142          6.50
                                                             ----------    ------------   -----------    ----------

OPERATING COSTS:
  PRODUCTION EXPENSES                                            94,398            0.57        65,720          0.53
  PRODUCTION TAXES                                               37,687            0.23        35,698          0.29
  GENERAL AND ADMINISTRATIVE EXPENSES:
    GENERAL AND ADMINISTRATIVE (EXCLUDING STOCK BASED
    COMPENSATION)                                                15,586            0.09        11,014          0.09
    STOCK BASED COMPENSATION                                      2,541            0.02           365            --
  PROVISION FOR LEGAL SETTLEMENTS                                    --              --           286            --
  OIL AND GAS MARKETING EXPENSES                                310,779            1.87       196,215          1.58
  OIL AND GAS DEPRECIATION, DEPLETION, AND AMORTIZATION         256,651            1.55       168,184          1.36
                                                                106,857
  DEPRECIATION AND AMORTIZATION OF OTHER ASSETS                  12,455            0.08         7,806          0.06
                                                             ----------    ------------   -----------    ----------
    TOTAL OPERATING COSTS                                       730,097            4.41       485,288          3.91
                                                             ----------    ------------   -----------    ----------

INCOME FROM OPERATIONS                                          407,324            2.46       320,854          2.59
                                                             ----------    ------------   -----------    ----------

OTHER INCOME (EXPENSE):
  INTEREST AND OTHER INCOME                                       2,678            0.02         1,544          0.01
  INTEREST EXPENSE                                              (75,351)          (0.46)      (75,040)        (0.60)
  LOSS ON REPURCHASES OR EXCHANGES OF CHESAPEAKE DEBT            (6,925)          (0.04)           --            --
                                                             ----------    ------------   -----------    ----------
    TOTAL OTHER INCOME (EXPENSE)                                (79,598)          (0.48)      (73,496)        (0.59)
                                                             ----------    ------------   -----------    ----------

INCOME BEFORE INCOME TAXES AND CUMULATIVE EFFECT
  OF ACCOUNTING CHANGE                                          327,726            1.98       247,358          2.00

INCOME TAX EXPENSE:
  CURRENT                                                            --              --            --           --
  DEFERRED                                                      117,981            0.71        93,998          0.76
                                                             ----------    ------------   -----------    ----------
    TOTAL INCOME TAX EXPENSE                                    117,981            0.71        93,998          0.76
                                                             ----------    ------------   -----------    ----------

NET INCOME BEFORE CUMULATIVE EFFECT OF
  ACCOUNTING CHANGE, NET OF TAX                                 209,745            1.27       153,360          1.24
                                                             ----------    ------------   -----------    ----------

CUMULATIVE EFFECT OF ACCOUNTING CHANGE, NET OF
  INCOME TAX OF $1,464,000                                           --             --          2,389          0.02
                                                             ----------    ------------   -----------    ----------

NET INCOME                                                      209,745            1.27       155,749          1.26

PREFERRED STOCK DIVIDENDS                                       (19,512)          (0.12)       (9,505)        (0.08)
                                                             ----------    ------------   -----------    ----------

NET INCOME AVAILABLE TO COMMON SHAREHOLDERS                     190,233            1.15       146,244          1.18
                                                             ==========    ============   ===========    ==========

- ---------------------------------------------------------------------------------------------------------------------
                                      8

EARNINGS PER COMMON SHARE:

   BASIC
      INCOME BEFORE CUMULATIVE EFFECT OF ACCOUNTING CHANGE   $     0.80                    $    0.70
      CUMULATIVE EFFECT OF ACCOUNTING CHANGE                         --                         0.01
                                                             ----------                    ----------
      NET INCOME                                             $     0.80                    $     0.71
                                                             ==========                    ==========

   ASSUMING DILUTION
    INCOME BEFORE CUMULATIVE EFFECT OF ACCOUNTING CHANGE     $     0.69                    $     0.62
    CUMULATIVE EFFECT OF ACCOUNTING CHANGE                           --                          0.01
                                                             ----------                    ----------
    NET INCOME                                               $     0.69                    $     0.63
                                                             ==========                    ==========

WEIGHTED AVERAGE COMMON AND COMMON
 EQUIVALENT SHARES OUTSTANDING (IN 000'S)

  BASIC                                                         239,016                       205,995
                                                             ==========                    ==========
  ASSUMING DILUTION                                             301,400                       247,391
                                                             ==========                    ==========


                          CHESAPEAKE ENERGY CORPORATION
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                   (IN 000'S)
                                   (UNAUDITED)
===============================================================================
                                              JUNE 30,    DECEMBER 31,
                                                2004         2003
- -------------------------------------------------------------------------------

CASH                                        $   76,237    $   40,581
OTHER CURRENT ASSETS                           461,690       301,823
                                            ----------    ----------
     TOTAL CURRENT ASSETS                      537,927       342,404
                                            ----------    ----------

PROPERTY AND EQUIPMENT (NET)                 5,706,029     4,133,117
OTHER ASSETS                                    96,768        96,770
                                            ----------    ----------
     TOTAL ASSETS                           $6,340,724    $4,572,291
                                            ==========    ==========

CURRENT LIABILITIES                         $  801,102    $  513,156
LONG TERM DEBT                               2,464,078     2,057,713
ASSET RETIREMENT OBLIGATION                     64,490        48,812
LONG TERM LIABILITIES                           73,880        28,774
DEFERRED TAX LIABILITY                         497,990       191,026
                                            ----------    ----------
     TOTAL LIABILITIES                       3,901,540     2,839,481

STOCKHOLDERS' EQUITY                         2,439,184     1,732,810
                                            ----------    ----------

TOTAL LIABILITIES & STOCKHOLDERS' EQUITY    $6,340,724    $4,572,291
                                            ==========    ==========


COMMON SHARES OUTSTANDING                      242,790       216,784
                                            ==========    ==========


                                      9

                                              CHESAPEAKE ENERGY CORPORATION
                                 SUPPLEMENTAL DATA - OIL & GAS SALES AND INTEREST EXPENSE

                                                                            THREE MONTHS ENDED             SIX MONTHS ENDED
                                                                     ---------------------------    --------------------------
                                                                                 JUNE 30,                      JUNE 30,
                                                                     ---------------------------    --------------------------
                                                                         2004            2003           2004          2003
                                                                     ------------  -------------    ------------   -----------

      OIL AND GAS SALES ($ IN THOUSANDS):
                                                                                                         
        Oil sales                                                      $ 59,930        $ 32,763       $107,961       $ 67,903
        Oil derivatives - realized gains (losses)                       (12,878)           (641)       (21,208)        (6,879)
        Oil derivatives -unrealized gains (losses)                       (1,470)         (1,101)        (7,489)        (1,178)
                                                                       --------        --------       ---------      ---------
              Total oil sales                                            45,582          31,021         79,264         59,846
                                                                       --------        --------       --------       --------

        Gas sales                                                       415,216         282,239        775,317        596,289
        Gas derivatives - realized gains (losses)                       (42,453)          1,811         (8,462)       (84,809)
        Gas derivatives -unrealized gains (losses)                      (18,680)          4,448        (26,661)        34,212
                                                                       --------        ---------      ---------      --------
              Total gas sales                                           354,083         288,498        740,194        545,692
                                                                       --------        --------       --------       --------

              Total oil and gas sales                                  $399,665        $319,519       $819,458       $605,538
                                                                       ========        ========       ========       ========

      AVERAGE SALES PRICE
       (EXCLUDING GAINS (LOSSES) ON
      DERIVATIVES):                                                    $  35.82        $  26.77       $  34.40       $  29.73
        Oil ($ per bbl)
        Gas ($ per mcf)                                                $   5.43        $   4.70       $   5.29           5.40
        Gas equivalent ($ per mcfe)                                        5.49        $   4.68       $   5.34      $    5.35

      AVERAGE SALES PRICE
       (EXCLUDING UNREALIZED GAINS
      (LOSSES) ON DERIVATIVES):
        Oil ($ per bbl)                                                $  28.12        $  26.24       $  27.65          26.72
        Gas ($ per mcf)                                                $   4.87        $   4.73       $   5.23       $   4.63
        Gas equivalent ($ per mcfe)                                        4.85        $   4.70       $   5.16           4.61

      INTEREST EXPENSE ($ IN THOUSANDS):
        Interest                                                       $(37,513)       $(38,452)      $(76,077)      $(74,156)
        Derivatives - realized (gains) losses                              (353)            682            405          1,356
        Derivatives - unrealized (gains) losses                           9,060            (266)           321         (2,240)
                                                                       --------        ---------      --------       --------
              Total Interest Expense                                   $(28,806)       $(38,036)      $(75,351)      $(75,040)
                                                                       --------        --------       --------       --------



                                                           CHESAPEAKE ENERGY CORPORATION
                                                        CONDENSED CONSOLIDATED CASH FLOW DATA
                                                                     (IN 000'S)
                                                                     (UNAUDITED)
                      =====================================================================================================
                      THREE MONTHS ENDED:                                         JUNE 30,        JUNE 30,
                                                                                    2004           2003
                      -----------------------------------------------------------------------------------------------------
                                                                                          
                       CASH PROVIDED BY OPERATING ACTIVITIES                 $       328,787    $   277,581

                       CASH (USED IN) INVESTING ACTIVITIES                   $      (864,016)   $  (313,485)

                       CASH PROVIDED BY FINANCING ACTIVITIES                 $       422,041    $    33,809

                      =====================================================================================================
                      =====================================================================================================



                       SIX MONTHS ENDED:                                          JUNE 30,        JUNE 30,
                                                                                    2004            2003
                      -----------------------------------------------------------------------------------------------------
                                                                                          
                       CASH PROVIDED BY OPERATING ACTIVITIES                 $       670,557    $   376,633

                       CASH (USED IN) INVESTING ACTIVITIES                   $    (1,599,450)   $(1,315,774)

                       CASH PROVIDED BY FINANCING ACTIVITIES                 $       964,549    $   727,413
                      =====================================================================================================



                                       10


                                                           CHESAPEAKE ENERGY CORPORATION
                                                      RECONCILIATION OF CERTAIN FINANCIAL MEASURES
                                                                    (IN 000'S)
                                                                    (UNAUDITED)
                      =====================================================================================================
                       THREE MONTHS ENDED:                                        JUNE 30,         JUNE 30,
                                                                                    2004            2003
                      -----------------------------------------------------------------------------------------------------
                                                                                          

                       CASH PROVIDED BY OPERATING ACTIVITIES                 $       328,787    $       277,581

                       ADJUSTMENTS:
                       CHANGES IN ASSETS AND LIABILITIES                             (20,614)           (51,512)
                                                                             ---------------    ---------------

                       OPERATING CASH FLOW*                                  $       308,173    $       226,069
                                                                             ===============    ===============
                      =====================================================================================================



                       SIX MONTHS ENDED:                                          JUNE 30,         JUNE 30,
                                                                                    2004             2003
                      -----------------------------------------------------------------------------------------------------
                                                                                          
                       CASH PROVIDED BY OPERATING ACTIVITIES                 $       670,557    $       376,633

                       ADJUSTMENTS:
                       CHANGES IN ASSETS AND LIABILITIES                             (28,830)           17,149
                                                                             ---------------    --------------

                       OPERATING CASH FLOW*                                  $       641,727    $       393,782
                                                                             ===============    ===============




* Operating  cash flow  represents  net cash  provided by  operating  activities
before  changes  in assets and  liabilities.  Operating  cash flow is  presented
because  management  believes  it is a useful  adjunct to net cash  provided  by
operating  activities  under  accounting  principles  generally  accepted in the
United  States  (GAAP).  Operating  cash flow is widely  accepted as a financial
indicator of an oil and gas company's  ability to generate cash which is used to
internally fund exploration and development activities and to service debt. This
measure is widely  used by  investors  and  rating  agencies  in the  valuation,
comparison,  rating and investment  recommendations  of companies within the oil
and gas  exploration  and  production  industry.  Operating  cash  flow is not a
measure of financial  performance  under GAAP and should not be considered as an
alternative to cash flows from operating,  investing, or financing activities as
an indicator of cash flows, or as a measure of liquidity.


                                       11




                                              CHESAPEAKE ENERGY CORPORATION
                                       RECONCILIATION OF CERTAIN FINANCIAL MEASURES
                                                        (IN 000'S)
                                                       (UNAUDITED)

=====================================================================================================
THREE MONTHS ENDED:                                                    JUNE 30,         JUNE 30,
                                                                         2004             2003
- -----------------------------------------------------------------------------------------------------
                                                                               
NET INCOME                                                         $       97,155    $        82,240

DEFERRED INCOME TAX EXPENSE                                                54,654             50,407
INTEREST EXPENSE                                                           28,806             38,036
DEPRECIATION AND AMORTIZATION OF OTHER ASSETS                               6,716              4,122
OIL AND GAS DEPRECIATION, DEPLETION AND AMORTIZATION                      136,743             91,570
                                                                   --------------    ---------------

EBITDA**                                                           $      324,074    $       266,375
                                                                   ==============    ===============

=====================================================================================================
SIX MONTHS ENDED:                                                      JUNE 30,         JUNE 30,
                                                                         2004             2003
- ------------------------------------------------------------------ ----------------- ----------------

NET INCOME BEFORE CUMULATIVE EFFECT OF ACCOUNTING CHANGE           $      209,745    $       153,360

DEFERRED INCOME TAX EXPENSE                                               117,981            93,998
INTEREST EXPENSE                                                           75,351            75,040
DEPRECIATION AND AMORTIZATION OF OTHER ASSETS                              12,455             7,806
OIL AND GAS DEPRECIATION, DEPLETION AND AMORTIZATION                      256,651           168,184
                                                                   ---------------   ---------------

EBITDA**                                                           $      672,183    $       498,388
                                                                   ==============    ===============


**Ebitda  represents  net income (loss) before  cumulative  effect of accounting
change,  income tax  expense  (benefit),  interest  expense,  and  depreciation,
depletion  and  amortization  expense.  Ebitda is  presented  as a  supplemental
financial  measurement  in the  evaluation of our  business.  We believe that it
provides  additional  information  regarding our ability to meet our future debt
service, capital expenditures and working capital requirements.  This measure is
widely  used by  investors  and rating  agencies in the  valuation,  comparison,
rating and investment  recommendations of companies.  Ebitda is also a financial
measurement that, with certain negotiated adjustments,  is reported to our banks
under our bank credit  facilities and is used in our financial  covenants  under
our bank credit facilities and our indentures governing our senior notes. Ebitda
is not a measure of financial performance under GAAP. Accordingly, it should not
be considered as a substitute for net income,  income from  operations,  or cash
flow provided by operating  activities  prepared in accordance with GAAP. Ebitda
is reconciled to cash provided by operating activities as follows:


===================================================================================================
THREE MONTHS ENDED:                                                    JUNE 30,         JUNE 30,
                                                                         2004             2003
- ------------------------------------------------------------------ ---------------------------------
                                                                               
CASH PROVIDED BY OPERATING ACTIVITIES                              $      328,787    $      277,581

CHANGES IN ASSETS AND LIABILITIES                                         (20,614)          (51,512)
INTEREST EXPENSE, REALIZED                                                 37,866            37,770
UNREALIZED GAINS (LOSSES) ON OIL AND GAS DERIVATIVES                      (20,150)            3,347
OTHER NON-CASH ITEMS                                                       (1,815)             (811)
                                                                   --------------    --------------

EBITDA                                                             $      324,074    $      266,375
                                                                   ==============    ==============



================================================================== ================= ================
SIX MONTHS ENDED:                                                      JUNE 30,         JUNE 30,
                                                                         2004             2003
- ------------------------------------------------------------------ ----------------- ----------------
                                                                               
CASH PROVIDED BY OPERATING ACTIVITIES                              $       670,557   $      376,633

CHANGES IN ASSETS AND LIABILITIES                                          (28,830)          17,149
INTEREST EXPENSE, REALIZED                                                  75,672           72,800
UNREALIZED GAINS (LOSSES) ON OIL AND GAS DERIVATIVES                       (34,150)          33,034
OTHER NON-CASH ITEMS                                                       (11,066)          (1,228)
                                                                   ---------------   --------------

EBITDA                                                             $       672,183   $      498,388
                                                                   ===============   ==============


                                       12



                          CHESAPEAKE ENERGY CORPORATION
              RECONCILIATION OF ADJUSTED EARNINGS & ADJUSTED EBITDA
                     ($ IN 000'S, EXCEPT PER SHARE AMOUNTS)

=====================================================================================================
                                                        THREE MONTHS ENDED       SIX MONTHS ENDED
                                                          JUNE 30, 2004           JUNE 30, 2004
- ----------------------------------------------------- ----------------------- -----------------------
                                                                        
Net income to common shareholders                     $        85,811         $       190,233

Adjustments, net of tax:
    Unrealized (gains) losses from hedging                      7,097                  21,651
    Loss on repurchases or exchanges of debt                      --                    4,432
                                                      ---------------          ---------------

Adjusted earnings*                                    $        92,908         $       216,316
                                                      ===============         ===============

Adjusted earnings per share assuming dilution         $          0.33         $          0.77
                                                      ===============         ===============



EBITDA                                                $       324,074         $       672,183

Adjustments, before tax:
    Unrealized (gains) losses from oil and gas                 20,150                  34,150
hedging
    Loss on repurchases or exchanges of debt                       --                   6,925
                                                      ---------------         ---------------

Adjusted EBITDA*                                      $       344,224         $       713,258
                                                      ===============         ===============


*Adjusted  earnings and  adjusted  EBITDA,  both  non-GAAP  financial  measures,
exclude  certain items that  management  believes  affect the  comparability  of
operating results.  The Company discloses these non-GAAP financial measures as a
useful adjunct to GAAP earnings and EBITDA because:

a.   Management  uses  adjusted  earnings  and  adjusted  EBITDA to evaluate the
     Company's  operational trends and performance relative to other oil and gas
     producing companies.
b.   Adjusted  earnings and adjusted  EBITDA are more comparable to earnings and
     EBITDA estimates provided by securities analysts.
c.   Items  excluded  generally  are  one-time  items,  or items whose timing or
     amount cannot be reasonably estimated.  Accordingly,  any guidance provided
     by the Company  generally  excludes  information  regarding  these types of
     items.

                                       13

                                  SCHEDULE "A"

                    CHESAPEAKE'S OUTLOOK AS OF JULY 26, 2004

QUARTER ENDING SEPTEMBER 30, 2004; QUARTER ENDING DECEMBER 31, 2004; YEAR ENDING
DECEMBER 31, 2004; YEAR ENDING DECEMBER 31, 2005.

We have adopted a policy of  periodically  providing  investors with guidance on
certain  factors that affect our future  financial  performance.  As of July 26,
2004, we are using the  following key  assumptions  in our  projections  for the
third and fourth quarters of 2004, the full-year 2004 and the full-year 2005.

The primary  changes from our May 11, 2004 guidance are in  italicized  bold and
are explained as follows:

1)       We have  replaced  our 2004 second  quarter  forecast  with our initial
         forecasts for the 2004 third and fourth quarters, have revised our full
         year 2004 forecast and have provided our initial 2005 forecast.
2)       We have updated our  previous  production  forecasts  for the full year
         2004 to  include  today's  announced  acquisitions  and the  results of
         recent  drilling  activities.   These  include  30  mmcfe  per  day  of
         production  beginning August 2, 2004 and an additional 30 mmcfe per day
         beginning  September 1, 2004 for the acquisitions and an additional 6.5
         mmcfe per day beginning July 1, 2004 for better than expected  drilling
         results during the second quarter.
3)       We have  updated  the  projected  effects  from the  reductions  in our
         hedging  positions.
4)       We have  included our expectations for future NYMEX oil and gas prices
         to illustrate hedging effects only. They are not a forecast of our
         expectations for 2004 and 2005 oil and  natural gas prices.
5)       For ease of  reconciliation,  please note that our first  quarter  2004
         production was 78.9 bcfe,  our second quarter 2004  production was 86.5
         bcfe and our first half 2004  Production  was 165.4  bcfe.  Our May 11,
         2004 Outlook forecasted a second quarter 2004 production range of 83-84
         bcfe and a full year 2004 production range of 341-347 bcfe.
6)       Solely for the  purposes  of this  Schedule  "A" we have  included  the
         projected effects of financing the recently announced acquisitions with
         the  issuance  of $300  million of  long-term  debt  securities  and 23
         million   shares  of  common  stock   (including  a  3  million   share
         over-allotment  option). There is no assurance we will make or complete
         such offerings.



                                                              Quarter Ending    Quarter Ending     Year Ending       Year Ending
                                                              September 30,     December 31,      December 31,      December 31,
                                                              --------------    -------------     -------------     ------------
                                                                   2004              2004              2004             2005
                                                                   ----              ----              ----             ----
Estimated Production:
                                                                                                          
  Oil - Mbo                                                       1,600             1,600             6,340             6,360
  Gas - Bcf                                                      82 - 83         86.5 - 87.5        315 - 317         352 - 362
  Gas Equivalent - Bcfe                                        91.5 - 92.5         96 - 97          353 - 355         390 - 400
  Daily gas equivalent midpoint - in  Mmcfe                       1,000             1,049              967              1,082
NYMEX Prices
  (for calculation of realized hedging effects only):
  Oil - $/Bo                                                         $34.00            $32.00             $34.87            $30.00
  Gas - $/Mcf                                                         $5.71             $5.50              $5.73             $5.00
Estimated Differentials to NYMEX Prices:
  Oil - $/Bo                                                         -$2.75            -$2.75            -$2.75            -$2.75
  Gas - $/Mcf                                                        -$0.75            -$0.75            -$0.75            -$0.75
Estimated Realized Hedging Effects
 (based on expected NYMEX prices above):
  Oil - $/Bo                                                         -$3.52            -$1.82            -$4.70             $0.13
  Gas - $/Mcf                                                        -$0.23             $0.01            -$0.09             $0.11
Operating Costs per Mcfe of Projected Production:
  Production expense                                           $0.57 - 0.62      $0.57 - 0.62      $0.57 - 0.62     $0.60 - 0.65
  Production taxes (generally 7% of O&G revenues)              $0.34 - 0.38      $0.34 - 0.38      $0.28 - 0.33     $0.30 - 0.35
  General and administrative                                   $0.10 - 0.11      $0.10 - 0.11      $0.10 - 0.11     $0.10 - 0.11
  Stock based compensation (non-cash)                          $0.02 - 0.04      $0.02 - 0.04      $0.02 - 0.04     $0.06 - 0.07
  DD&A - oil and gas                                           $1.60 - 1.65      $1.60 - 1.65      $1.60 - 1.65     $1.65 - 1.70
  Depreciation of other assets                                 $0.08 - 0.10      $0.08 - 0.10      $0.08 - 0.10     $0.08 - 0.10
  Interest expense(a)                                          $0.46 - 0.50      $0.46 - 0.50      $0.45 - 0.49     $0.44 - 0.48
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                                                           256 mm            278 mm            253 mm           285 mm
  Diluted(b)                                                      319 mm            328 mm            312 mm           328 mm

Capital Expenditures:
  Drilling, leasehold and seismic                              $260 - $290       $260 - $290       $1,000 -            $1,000 -
                                                                    mm                mm          $1,100 mm           $1,100 mm


                                       14


(a)  Does not include gains or losses on interest rate derivatives (SFAS 133).
(b)  Does  not  include  the  potential   conversion  of  the  company's  4.125%
     convertible  preferred stock because the common stock price does not exceed
     the conversion price of the preferred.

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.

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

                                       15



                                                                          % 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)          56.3      $5.34     -$0.09         $5.25          82.5           68%
4th Qtr(1)          35.0      $5.39     -$0.27         $5.12          87.0           40%
- -------------------------------------------------------------------------------------------
Total 2004         223.0      $5.48     -$0.07         $5.41         316.1           71%
===========================================================================================
===========================================================================================
Total 2005(1)       61.3      $5.24     -$0.50         $4.74         357.0           17%
===========================================================================================
===========================================================================================
Total 2006(1)(2)      -          -         -               -         375.0            -
===========================================================================================
===========================================================================================
Total 2007(2)         -          -         -               -         395.0            -
- -------------------------------------------------------------------------------------------
===========================================================================================
TOTALS
- -------------------------------------------------------------------------------------------
2004-2007          284.3      $5.43     -$0.29         $5.14       1,443.1           24%
===========================================================================================

(1)   Certain  hedging  arrangements  include swaps with knockout  price ranging
      from $3.75 to $4.75 covering 4.6 bcf in 2004,  $3.75 to $4.75 covering 9.1
      bcf in 2005 and $3.75 covering 7.3 bcf in 2006.

(2)   Swaps  covering  32.9 bcf and 25.6 bcf have been locked for 2006 and 2007.
      This will result in the  recognition of $22.6 million and $11.6 million of
      losses  in 2006 and  2007,  respectively,  when the  hedging  arrangements
      settle.

(3)   Not shown  above are collars covering 1.5 bcf and 4.4 bcf of production in
      2004 and 2005,  respectively,  at a weighted  average floor and ceiling of
      $3.10 and $4.44. In addition,  call options  covering 27.4 bcf and 7.3 bcf
      of  production  in 2004 and 2005 at  weighted  average  price of $6.19 and
      $6.00 are not included in the table above.

                                       16


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               0.173               316.1              50%
2005                         109.5               0.156               357.0              31%
2006                          47.5               0.155               375.0              13%
2007                          63.9               0.166               395.0              16%
2008                          64.0               0.166               415.0              15%
2009                          37.0               0.160               435.0               9%
                       -----------------   ----------------     ------------------    ------
Totals                        479.3        $      0.164*           2,293.1              21%
                       =================   ================     ==================    ======

* weighted average

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

                                                         % Hedged
                                              ---------------------------------
                                                 Assuming        Open Swap
                                       Avg.         Oil         Positions as
                          Open        NYMEX      Prodution     % of Total
                        Swaps in      Strike      in mbo's      Estimated
                         Mmbo'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        1,600             95%
Q4 - 2004(1)              1,518       $30.10        1,600             95%
                 --------------------------------------------------------------

Total 2004(1)             5,847       $29.80        6,338             92%
                 ===============================================================

Total 2005(1)               548       $31.56        6,360              9%
                 ===============================================================

(1)  Certain  hedging  arrangements  include swaps with a knockout price ranging
     from $21.00 to $26.00  covering  2,240 mbo in 2004 and a knockout  price of
     $26.00 covering 548 mbo in 2005.


                                       17

                                  SCHEDULE "B"

                CHESAPEAKE'S PREVIOUS OUTLOOK AS OF MAY 11, 2004
                          (PROVIDED FOR REFERENCE ONLY)

                  NOW SUPERSEDED BY OUTLOOK AS OF JULY 26, 2004

QUARTER ENDING JUNE 30, 2004; YEAR ENDING DECEMBER 31, 2004.
We have adopted a policy of  periodically  providing  investors with guidance on
certain  factors  that affect our future  financial  performance.  As of May 11,
2004, we are using the  following key  assumptions  in our  projections  for the
second quarter of 2004 and the full-year 2004.

The primary  changes from our April 26, 2004 guidance are in italicized bold and
are explained as follows:

1)       We have  increased our  production  forecast for the second quarter and
         full-year  2004 because of the  Greystone  acquisition  and better than
         expected recent drilling results.
2)       We have  included the effects of financing  the  Greystone  transaction
         with $300 million of senior notes and $125 million of bank debt.
3)       We have  updated  the  projected  effects  from  changes in our hedging
         positions.
4)       We have included our  expectations  for future NYMEX oil and gas prices
         to  illustrate  hedging  effects  only.  They are not a forecast of our
         expectations for 2004 oil and natural gas prices.


                                                                  Quarter Ending            Year Ending
                                                                  June 30, 2004         December 31, 2004
                                                                  -------------         -----------------
Estimated Production:
                                                                                      
  Oil - Mbo                                                           1,540                    6,185
  Gas - Bcf                                                          74 - 75                 304 - 310
  Gas Equivalent - Bcfe                                              83 - 84                 341 - 347
  Daily gas equivalent midpoint - in  Mmcfe                            918                      940
NYMEX Prices (for calculation of realized hedging effects only):
  Oil - $/Bo                                                         $30.87                     $30.00
  Gas - $/Mcf                                                         $5.35                      $5.14
Estimated Differentials to NYMEX Prices:
  Oil - $/Bo                                                         -$2.75                    -$2.72
  Gas - $/Mcf                                                        -$0.70                    -$0.71
Estimated Realized Hedging Effects
  (based on expected NYMEX prices above):
  Oil - $/Bo                                                         -$0.71                    +$0.05
  Gas - $/Mcf                                                        -$0.06                    +$0.33
Operating Costs per Mcfe of Projected Production:
  Production expense                                               $0.55 - 0.60             $0.55 - 0.60
  Production taxes (generally 7% of O&G revenues)                  $0.28 - 0.30             $0.28 - 0.32
  General and administrative                                       $0.10 - 0.11             $0.10 - 0.11
  Stock based compensation (non-cash)                              $0.02 - 0.03             $0.02 - 0.03
  DD&A - oil and gas                                               $1.52 - 1.56             $1.52 - 1.60
  Depreciation of other assets                                     $0.07 - 0.09             $0.07 - 0.09
  Interest expense(a)                                              $0.49 - 0.53             $0.45 - 0.50
Other Income and Expense per Mcfe:
  Marketing and other income                                       $0.02 - 0.04             $0.02 - 0.04

Book Tax Rate                                                          36%                      36%
Equivalent Shares Outstanding:
  Basic                                                               241 mm                   247 mm
  Diluted                                                             304 mm                   305 mm

Capital Expenditures:
  Drilling, leasehold and seismic                                  $200 - $225 mm           $875 - $925 mm


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

                                       18

COMMODITY HEDGING ACTIVITIES

Periodically  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.

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 from    Open and        Gas         Estimated
                    Swaps     of Open    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              60.4     $5.11       $0.00        $5.11         74.5            81%
3rd Qtr              58.4     $5.28       $0.00        $5.28         80.0            73%
4th Qtr              39.6     $5.27       $0.00        $5.27         82.4            48%
- ----------------------------------------------------------------------------------------------
Total 2004          227.9     $5.43       $0.01        $5.44        307.0            74%
==============================================================================================
==============================================================================================
Total 2005           88.4     $5.12       $0.00        $5.12        320.0            28%
==============================================================================================
==============================================================================================
Total 2006           32.9     $4.88       $0.00        $4.88        330.0            10%
==============================================================================================
==============================================================================================
Total 2007           25.6     $4.76       $0.00        $4.76        340.0             7%
==============================================================================================
TOTALS
- ----------------------------------------------------------------------------------------------
2004-2007           374.8     $5.26       $0.01        $5.27      1,297.0            29%
==============================================================================================




                                       19

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



                                                                  Assuming Gas
                            Annual                             Production in Bcf's
                        Volume in Bcf's       NYMEX less:             of:             %Hedged
                       ----------------    ----------------    -------------------    -------
                                                                            
2004                         157.4               0.173               307.0              52%
2005                         109.5               0.156               320.0              34%
2006                          47.5               0.155               330.0              14%
2007                          63.9               0.166               340.0              19%
2008                          64.0               0.166               350.0              18%
2009                          37.0               0.160               360.0              10%
                       -----------------   ----------------    ------------------     ------
Totals                       479.3             $ 0.164*            2,007.0              24%
                       =================   ================    ==================     ======


* weighted average


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

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

Q1 - 2004*               1,270        $28.58       1,465           87%

Q2 - 2004*               1,540        $30.00       1,540          100%

Q3 - 2004*               1,519        $30.32       1,590           96%

Q4 - 2004*               1,518        $30.10       1,590           95%
                        -------------------------------------------------------

Total 2004*                5,847         $29.80       6,185           95%
                        =======================================================

Total 2005*                  548         $31.56       6,360            9%
                        =======================================================

*Swaps with a knockout price of $21.00, with the exception of 2,000 bopd in 2004
with a knockout  price of $24.00,  with an  additional  1,000 bopd in Q2 2004 at
$24.00, 1,000 bopd in Q3 and Q4 2004 with a knockout price of $23.00, 2,000 bopd
for 1/04 and  3-8/04 at a  knockout  price of  $22.00,  3,000  bopd in 2/04 at a
knockout  price of $22.00 and 1,500 bopd from 4/04  through  12/05 at a knockout
price of $26.00.


                                       20