BARRETT RESOURCES CORP
10-K405, 1999-03-18
CRUDE PETROLEUM & NATURAL GAS
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                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                                   FORM 10-K
 
[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
     ACT OF 1934
 
                       For Year Ended December 31, 1998
 
                                      or
 

[_]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934
 
                  For the Transition Period from      to
 
                          Commission File No. 1-13446
 
                         BARRETT RESOURCES CORPORATION
            (Exact name of registrant as specified in its charter)
 
             Delaware                                 84-0832476
   (State or other jurisdiction of        (I.R.S. Employer Identification No.)
    incorporation or organization)
 
       1515 Arapahoe Street,
        Tower 3, Suite 1000
         Denver, Colorado                                80202
       (Address of principal                           (Zip Code)
         executive offices)
 
                                (303) 572-3900
             (Registrant's telephone number, including area code)
 
          Securities registered pursuant to Section 12(b) of the Act:
 
          Title of Each Class           Name of Exchange on which registered:
- ------------------------------------    -------------------------------------
 
Common Stock ($.01 Par Value Per Share)      New York Stock Exchange, Inc.
    Preferred Stock Purchase Rights
 
          Securities registered pursuant to Section 12(g) of the Act:
 
                                    (None)
 
  Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days. Yes  [X]   No  [_]
 
  Indicate by check mark if there are no delinquent filers to disclose herein
pursuant to Item 405 of Regulation S-K, and there will not be any delinquent
filers to disclose, to the best of registrant's knowledge, in definitive proxy
or information statements incorporated by reference in Part III of this Form
10-K or any amendment to this Form 10-K. [X]
 
  As of March 15, 1999, the Registrant had 32,032,104 common shares
outstanding, and the aggregate market value of the common shares held by non-
affiliates was approximately $686,281,158. This calculation is based upon the
closing sale price of $22.25 per share for the stock on March 15, 1999.
 
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<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
 Item                                                                     Page
 ----                                                                     ----
                                     PART I
 
 <C>       <S>                                                            <C>
  1 and 2. Business and Properties......................................    1
  3.       Legal Proceedings............................................   17
  4.       Submission of Matters to Vote of Security Holders............   17
 
                                    PART II
 
  5.       Market for Registrant's Common Stock and Related Security
            Holders Matters.............................................   18
  6.       Selected Financial Data......................................   18
  7.       Management's Discussion and Analysis of Financial Condition
            and Results of Operations...................................   19
  8.       Financial Statements and Supplementary Data..................   24
  9.       Changes in and Disagreements with Accountants on Accounting
            and Financial Disclosure....................................   24
 
                                    PART III
 
 10.       Directors and Executive Officers of the Company..............   25
 11.       Executive Compensation.......................................   29
 12.       Security Ownership of Certain Beneficial Owners and
            Management..................................................   33
 13.       Certain Relationships and Related Transactions...............   34
 
                                    PART IV
 
 14.       Exhibits, Financial Statement Schedules, and Reports on Form
            8-K.........................................................   35
</TABLE>
<PAGE>
 
                                    PART I
 
Items 1. and 2. Business and Properties
 
  Barrett Resources Corporation (the "Company" or "Barrett", which reference
shall include the Company's wholly owned subsidiaries) was incorporated in
December 1980 as an oil and gas company under the name AIMEXCO Inc. and became
publicly owned with a $5.8 million common stock offering in May 1981. In
December 1983, AIMEXCO acquired all the common stock of Barrett Energy
Company, which owned a number of oil and gas properties, in exchange for 71.5
percent of the common stock of AIMEXCO that was outstanding after the
transaction. In January 1984, the Company changed its name to Barrett
Resources Corporation.
 
  In November 1985, the Company acquired Excel Energy Corporation, a Utah
corporation that owned oil and gas interests, in exchange for approximately
1,425,000 shares of the Company's common stock. In June 1987, the Company
acquired all the outstanding stock of Finance For Energy, Ltd., whose assets
consisted primarily of cash and mortgages, in exchange for 1,174,100 shares of
the Company's common stock.
 
  In September 1987, the Company effected a one-for-twenty reverse stock split
of the Company's common shares and changed the par value of its common stock
to $.01 per share. All prior references in this Item to numbers of shares of
the Company's common stock have been adjusted for the effect of this one-for-
twenty reverse stock split.
 
  In May 1990, the Company completed the public offering of 3,565,000 shares
of its common stock for $21.3 million, net of the underwriting discount. In
March 1993, the Company completed the public offering of an additional two
million shares of its common stock for $19.2 million, net of the underwriting
discount.
 
  In July 1995, the Company completed the merger of the Company and Plains
Petroleum Company ("Plains") pursuant to which Plains became a wholly owned
subsidiary of the Company. The Company issued 12.8 million shares of common
stock in exchange for all the outstanding shares of Plains.
 
  In June 1996, the Company completed the public offering of 5.4 million
shares of its common stock for $135 million, net of the underwriting discount.
 
  In February 1997, the Company completed the public offering of $150 million
of its 7.55% Senior Notes due 2007.
 
Oil and Gas Exploration and Development
 
  Barrett is an independent natural gas and crude oil exploration and
production company with core areas of activity in the Rocky Mountain Region of
Colorado, Wyoming and Utah; the Mid-Continent Region of Kansas, Oklahoma, New
Mexico and Texas; and the Gulf of Mexico Region of offshore Texas and
Louisiana. At December 31, 1998, the Company's estimated proved reserves were
970.3 Bcfe (94% natural gas and 6% crude oil) with an implied reserve life of
9.1 years based on 1998 total production of 107 Bcfe.
 
  The Company concentrates its activities in core areas in which it has
accumulated detailed geologic knowledge and developed significant management
expertise. The Company continues to build on its interests in the Piceance
Basin in northwestern Colorado, the Wind River Basin in Wyoming, and the
Anadarko and Arkoma Basins in Oklahoma. The Company also has significant
interests in the Hugoton Embayment in Kansas and Oklahoma, the Niobrara play
in northeastern Colorado, the Powder River Basin of northeastern Wyoming, the
Gulf of Mexico and the Uinta Basin of northeastern Utah. At December 31, 1998,
these principal areas of focus represented approximately 96% of the Company's
estimated proved reserves.
 
  The Company is currently pursuing development projects in the Wind River,
Piceance, Powder River, Anadarko and Arkoma Basins, and exploration projects
in the Wind River and Anadarko Basins and the Gulf of Mexico. The Company's
average net daily production increased to 293 MMcfe for the year ended
December 31, 1998 from 247 MMcfe for the year ended December 31, 1997.
 
                                       1
<PAGE>
 
  As of December 31, 1998, the Company owned an interest in 3,102 wells, of
which 2,378 were producing. Of these producing wells, 1,252 were operated by
the Company. These operated wells contributed approximately 73% of the
Company's natural gas and oil production for the year ended December 31, 1998.
The Company also owns interests in and operates a natural gas gathering
system, a 27-mile pipeline and a natural gas processing plant in the Piceance
Basin.
 
  Barrett markets all of its own natural gas and oil production from wells
that it operates. In addition, the Company engages in natural gas trading
activities, which involve purchasing natural gas from third parties and
selling natural gas to other parties at prices and volumes that management
anticipates will result in profits to the Company. Through these natural gas
trading activities, the Company obtains knowledge and information that enables
it to more effectively market its own production. See "Natural Gas and Oil
Marketing and Trading."
 
Employees and Offices
 
  The Company currently has 196 full time employees, including 10 officers
(three of whom are geologists and three of whom are petroleum engineers), 12
geologists, four geophysicists, 14 engineers, one environmental manager, 10
landmen, three district managers, one operations superintendent, and
administrative, clerical, accounting and field operations personnel, none of
whom is represented by organized labor unions.
 
  The Company's executive offices are located at 1515 Arapahoe Street, Tower
3, Suite 1000, Denver, Colorado 80202, and its telephone number is (303) 572-
3900.
 
Core Areas of Activity
 
  The following table sets forth certain information concerning these core
areas of activity:
 
<TABLE>
<CAPTION>
                                                               Average Daily
                         Estimated Proved  Estimated Proved   Production for
                            Reserves at       Reserves at       Year Ended
     Basin or Field      December 31, 1997 December 31, 1998 December 31, 1998
     --------------      ----------------- ----------------- -----------------
                              (Bcfe)            (Bcfe)            (MMcfe)
<S>                      <C>               <C>               <C>
Rocky Mountain Region
  Wind River............       118.4             137.3              63.8
  Piceance..............       339.6             315.3              55.9
  Powder River..........        24.2              11.9              15.1
  Powder River-CBM......        18.7             142.6              18.6
  Green River...........         9.8              15.2               3.0
  Uinta.................        82.3              42.2               9.0
  NE Colorado-Niobrara..        23.6              24.6               5.5
Mid-Continent Region
  Arkoma................        28.8              26.0              12.9
  Anadarko..............        33.8              25.4              20.0
  Hugoton Embayment.....       195.8             172.1              42.7
  Permian...............        20.9              11.7               8.5
Gulf of Mexico Region...        59.2              39.0              37.0
Other Natural Gas and
 Oil Activities(1)......         8.0               7.0               1.2
                               -----             -----             -----
Total...................       963.2             970.3             293.2
                               =====             =====             =====
</TABLE>
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  (1) The only significant property in this category is the Meeteetse Field in
the Big Horn Basin, Wyoming.
 
Rocky Mountain Region
 
  Wind River Basin. In 1994, following its major natural gas discovery in the
Cave Gulch Field, the Company began a focused exploration and development
program in the Wind River Basin of Central Wyoming, particularly along the Owl
Creek Thrust fault.
 
                                       2
<PAGE>
 
  Cave Gulch Area.  In August 1994, the Company drilled the Cave Gulch Federal
Unit 1-16 well and discovered a significant natural gas field in the Fort
Union and Lance Sandstones below the Owl Creek Thrust. Since August 1994, the
Company has acquired additional interests in the area and currently owns
working interests ranging from 41% to 100% in 11,572 gross and 9,080 net
leasehold acres in the Cave Gulch area, including a 94% working interest in
the Cave Gulch Federal Unit covering the Fort Union and Lance Sandstones.
 
  In 1998, the Company continued its shallow development program by drilling
and completing four Lance wells (three were successful and one stepout well
was plugged and abandoned), and one shallow Fort Union producer. One of these
wells, the West Cave Gulch 1-36, had an initial producing rate of 13.9 MMcfd
of gas and 121 BOPD. The Company also drilled and completed its first 20-acre
Lance pilot test, the Cave Gulch Unit 21, at an initial flow rate of 4.2 MMcfd
and 17 BOPD. Although certain Lance zones exhibited no significant pressure
depletion, the well's production performance will be monitored during 1999 to
gauge the feasibility of additional 20-acre infill wells. Through December
1998, the Company has operated and completed a total of 23 Lance wells (22
successful and one unsuccessful), one shallow Fort Union producer, and one
Mesaverde producer.
 
  In February 1997, the Company reached a total depth of 19,106 feet on its
deep discovery well, the Cave Gulch Federal 16. In August 1997, the well was
completed in the lower part of the Third Frontier Sandstone with a stabilized
flow rate of 10.2 MMcfd, and in August 1998 was recompleted in the upper part
of the Third Frontier Sand, as well as the entire First Frontier Sand. Prior
to recompletion, the well was flowing approximately 3.5 MMcfd and after
recompletion it flowed 11.9 MMcfd. Several pay zones in this well, including
the Fourth and Fifth Frontier Sands, and the Muddy Sandstone have not yet been
opened for production. The Company owns an 85.3% working interest in this
well.
 
  In early 1998, the Cave Gulch Federal 1-29LAK, the Company's second deep
test, encountered a significant gas kick while drilling at 18,175 feet in the
Muddy Formation. With the assistance of pressure control personnel the well
was placed on production February 20, 1998, and produced 7.5 Bcf during its
first six months on production. On August 13, 1998 the well blew out
uncontrollably due to what the Company believes was a downhole casing failure.
The natural gas venting from the well was ignited on August 17, 1998. A nearby
deep development well, the Cave Gulch Federal 4-19LAK, was converted to a
relief well and drilled to a total depth of 16,462 feet. The 4-19LAK
intersected the 1-29LAK wellbore in early January 1999. In late November 1998,
the venting gas was extinguished when the 1-29LAK wellbore bridged off,
abruptly constricting the gas flow. In early 1999, the Company temporarily
abandoned the 4-19LAK relief wellbore. A drilling rig was moved onto the 1-
29LAK location in early February 1999 and an assessment will be made of the
condition and extent of necessary repairs to the wellbore. It will then be
determined whether to repair the well, place it back on production or drill a
replacement well. Insurance is expected to cover the costs associated with the
control of the 1-29LAK, the drilling of the relief well and the repair or
redrilling of the 1-29LAK well down to the depth of the blowout. Insurance
coverage does not extend to the natural gas vented between August 13 and late
November 1998. The Company has a 70% working interest in the 1-29LAK well.
 
  On September 18, 1997, the Company spud the Cave Gulch 3-29MAD, an ultra-
deep exploratory well designed to test the Madison and Tensleep Formations and
reached a total depth of 21,965 feet on May 11, 1998. Both the Madison and
Tensleep Formations tested non-productive. The Company has a 97% working
interest in these ultra-deep horizons. Subsequent to testing the ultra-deep
horizons, the well was plugged back to just below the Muddy, Lakota and
Morrison horizons. In October 1998, the Company perforated and stimulated the
Muddy Sandstone resulting in an initial flow rate of 36.0 MMcfd. Bottom hole
pressure tests indicated that the 3-29MAD well and the Cave Gulch 1-29LAK are
in the same Muddy reservoir. By year-end 1998, the 3-29MAD had produced
approximately 2.0 Bcf from the Muddy Formation. Pay horizons such as the
Lakota Formation, as well as four benches in the Frontier Formation, remain
behind pipe in this well. The Company currently has an 80% working interest in
the Frontier, Muddy, and Lakota horizons in the 3-29MAD well.
 
                                       3
<PAGE>
 
  In July 1998, the Company spud its fourth deep test, the Cave Gulch Federal
5-30LAK targeting the Frontier, Muddy, Lakota, Morrison, and Sundance
Formations. The well was completed in January 1999, and is currently producing
8.5 MMcfd. The Company owns an 85% working interest in this well.
 
  Two interstate pipelines serving the Cave Gulch area completed expansions
during 1997, which increased take-away capacity. At the same time, the Company
installed a centralized compressor and wet gas conditioning facility on its
gathering system, which enables the Company to transport increased volumes of
gas to the interstate pipelines. Gross Cave Gulch Field production at year-end
1998 was 90.5 MMcfed.
 
  The Company is in the final stages of a 62 square mile three-dimensional
("3-D") seismic acquisition program covering land immediately south of the
original Cave Gulch 22 square mile 3-D seismic survey obtained in early 1995.
This survey will aid the Company's exploratory program both within and
adjacent to the Cave Gulch area.
 
  Owl Creek Thrust.  The Company continues to evaluate additional exploration
prospects in the Owl Creek Thrust, along the northern margins of the Wind
River Basin. In July 1997, the Company entered into a definitive Exploration
and Area of Mutual Interest Agreement with an oil and gas industry partner to
explore for oil and gas along the Owl Creek Thrust. The partner was assigned
45% of the Company's interest in 77,127 net acres. To date, the Company and
its partner have drilled two unsuccessful exploratory tests.
 
  At December 31, 1998, the Wind River Basin represented 14% of the Company's
estimated proved reserves, and 22% of the Company's total 1998 production. The
Company intends to spend 18% of its estimated $92 million 1999 capital
expenditure budget in the Wind River Basin for development, leasehold
acquisition, seismic surveys and exploration. The Company will drill at least
two deep Frontier-Muddy-Lakota tests, and one to four shallow Fort Union-Lance
wells in 1999.
 
  Piceance Basin.  The Piceance Basin of northwestern Colorado is a core
operating area for the Company and will continue to be very prominent in the
Company's capital spending plans. The Company's activities in the Piceance
Basin are conducted primarily in three fields: Parachute, Rulison and Grand
Valley.
 
  The Company's drilling activities in the Piceance Basin primarily target the
lenticular sandstones of the Williams Fork Formation of the Mesaverde Group.
The Company drilled its first well in the Piceance Basin in 1984, and as of
December 31, 1998, the Company owned interests in 399 wells and operated 374
of these wells.
 
  On January 8, 1998, the Company gained approval from the Colorado Oil and
Gas Conservation Commission ("COGCC") for 20-acre well density on 2,830 net
acres, approximately 4% of its net acreage, in the Piceance Basin. This COGCC
approval allows for 107 additional 20-acre infill locations associated with
the approved acreage.
 
  The Company's 1999 plans call for drilling or participating in 31 Williams
Fork wells and one dual horizontal Cozzette/Corcoran well, the RMV 94-21H,
while operating two drilling rigs in the Basin. After completing and flow
testing the horizontal laterals, the vertical Williams Fork member in the RMV
94-21H will be completed and commingled with the Cozzette/Corcoran. Based upon
the results of this well, a 3-D seismic program may be shot and one additional
horizontal Cozzette/Corcoran well may be drilled in the Rulison Field in 1999.
 
  At December 31, 1998, the Piceance Basin represented 32% of the Company's
estimated proved reserves, and 19% of the Company's total 1998 production. The
Company intends to spend 18% of its 1999 capital expenditure budget in the
Piceance Basin for development and exploration, including participating in
drilling up to 32 wells.
 
  Grand Valley Gathering System.  In 1985, the Company's wholly owned
subsidiary, Bargath, Inc., designed and constructed a gathering system in the
Grand Valley Field to transport natural gas from certain of
 
                                       4
<PAGE>
 
the Company's wells to Questar Pipeline Corporation's interstate pipeline.
Through four acquisitions in 1996, the Company increased its ownership
interest in this system to 64%. As of December 31, 1998, the Grand Valley
Gathering System was connected to 318 natural gas producing wells. The system
now has the flexibility to deliver natural gas to three interstate pipelines
as well as Public Service of Colorado's western Colorado distribution system.
It is anticipated that a fourth interstate pipeline (TransColorado) will be
connected to the gathering system at the end of the first quarter of 1999. In
December 1994, the Company completed the construction of a 90 MMcfd per day
natural gas processing plant to extract liquid hydrocarbons from the natural
gas stream. In 1997, the Company looped the main 8-inch pipeline adding 20
miles of new 16-inch pipeline and associated compression. The gathering system
has in excess of 200 miles of lateral lines connected to it. Following these
improvements and subject to the take-away capacity of these four pipeline
systems, the gathering system has the capability of delivering over 150 MMcfd
gas per day.
 
  Uinta Basin  As an extension of its Piceance Basin operations, the Company
entered the Uinta Basin of Duchesne and Uintah Counties, in northeastern Utah,
in 1995. The Douglas Creek Arch separates the Uinta Basin from the Piceance
Basin.
 
  Brundage Canyon Field.  Beginning in December 1995, the Company made
acquisitions in the Brundage Canyon Field. As a result of these acquisitions
and new drilling, the Company currently owns working interests ranging from
75% to 100% in 35 producing wells, a gathering and transmission system, and
54,605 gross and 53,409 net acres. Wells in this field produce primarily from
multiple sandstone reservoirs of the lower Green River Formation at depths
averaging 5,500 feet.
 
  Altamont-Bluebell Field. The Altamont-Bluebell Field complex, which includes
the Cedar Rim area, covers a large portion of the northern Uinta Basin. The
Company owns working interests ranging from 25% to 100% in 55 producing wells
and in approximately 115,804 gross and 89,974 net acres of leasehold
interests. The Company's production in this area is predominantly from the
multiple sandstone reservoirs of the Wasatch Formation, which are found at an
average depth of 12,000 feet. Also productive in the field are the upper,
lower, and middle portions of the Green River Formation at depths of 5,000 to
7,000 feet.
 
  In 1998, the Company plugged eight depleted wells in the Altamont-Bluebell
Field. In addition, in an effort to further evaluate upside opportunities in
the Altamont-Bluebell properties, the Company successfully recompleted three
wells and drilled one infill development well as part of a joint venture
program with an outside party.
 
  At December 31, 1998, the Uinta Basin represented approximately 4% of the
Company's estimated proved reserves and 3% of the Company's production. The
Company intends to spend 1% of its 1999 capital expenditure budget in the
Uinta Basin in 1999 for development, leasehold acquisition and exploration.
 
  Powder River Basin.  The Powder River Basin in Wyoming is primarily an oil
province, with production from Cretaceous and Permian Age formations. One of
the reservoir targets in this Basin is the Permian Minnelusa formation. The
Company has recently engaged in the development of coal bed methane which
targets the shallow Fort Union Formation.
 
  Coal Bed Methane.  In October 1997, the Company entered into a joint
development agreement to participate, with a 50% working interest, in a coal
bed methane project covering a 2.1 million acre area of mutual interest
("AMI") located north and south of Gillette, Wyoming. In 1998, the Company
rapidly expanded its coal bed methane leasehold position with its joint
development partner to over 800,000 gross acres. The coal seams lie 500-1,500
feet below the surface making drilling and completion of the wells very
economic. In 1998, the Company participated in 307 wells, including 159 that
are waiting on pipeline connection, and 104 new producing wells in this area,
bringing the total number of coal bed methane producing wells at year-end to
412, with gross production at a combined rate of approximately 75 MMcfd.
 
                                       5
<PAGE>
 
  The Bureau of Land Management ("BLM") has required an Environmental Impact
Study ("EIS") prior to approving additional drilling on Federal leases in the
Powder River Basin. Approximately half of the Company's acreage in the Powder
River Basin is on Federal leases. The Company anticipates completion of the
EIS in September 1999.
 
  On July 20, 1998, the U.S. Tenth Circuit Court of Appeals ruled in the Case
of the Southern Ute Indian Tribe vs. Amoco Production Company. The Tenth
Circuit reversed a District court decision that held that the fee owner of
land patented under the 1909 and 1910 Coal Land Act owned the coal bed methane
rights. Based upon the Tenth Circuit decision, Barrett put on hold the
drilling of coal bed methane wells located on fee leases in the Powder River
Basin. On October 21, 1998, President Clinton signed legislation by which the
Federal government relinquished its claim to coal bed methane under lands
patented pursuant to the 1909 and 1910 Acts where private leases were executed
prior to the signing of this legislation. With this, the Company resumed
drilling on its fee leases. Additionally, the Company will have a 10% working
interest in the new 90-mile Fort Union Gathering System that will have an
initial take-away capacity of 300 MMcfd beginning in late 1999.
 
  At December 31, 1998, the Powder River Basin represented 16% of the
Company's estimated proved reserves and 11% of the Company's total 1998
production. This Basin contributes approximately 35% of the Company's daily
oil production. The Company intends to spend 24% of its 1999 capital
expenditure budget in the Basin, including participating in an additional 500
to 600 wells in its coal bed methane play.
 
  Northeastern Colorado--Niobrara. During 1998, the Company continued its
Niobrara exploration and development program in northeastern Colorado. This is
a shallow natural gas play targeting a 20 to 50 foot thick chalk reservoir in
the Upper Cretaceous Niobrara Formation. Gas accumulations in the chalk are
generally controlled by structural closure. In 1998, the Company acquired 18
miles of proprietary seismic data and 460 miles of trade seismic data. The
Company drilled or participated in 23 wells during 1998, of which 20 were
successful.
 
  At December 31, 1998, Niobrara represented 3% of the Company's estimated
proved reserves, and 2% of the Company's total 1998 production. The Company
intends to spend 8% of its 1999 capital budget in the play for the drilling of
16 wells, acquiring additional leasehold, seismic data and related
infrastructure.
 
Mid-Continent Region
 
  Arkoma Basin.  In 1998, the Company participated in the drilling of five
wells in three areas of the Arkoma Basin in Oklahoma: South Panola, Red Oak,
and Wilburton. All five wells were completed as gas wells. Due to the complex
structure and overlapping nature of the rock formations, the Company uses 3-D
seismic surveys extensively in the Arkoma Basin.
 
  At December 31, 1998, the Arkoma Basin represented 3% of the Company's
estimated proved reserves and 4% of the Company's total 1998 production. The
Company intends to spend 1% of its 1999 capital expenditure budget for
drilling one well, seismic surveys and land acquisitions.
 
  Anadarko Basin.  In 1998, the Company participated in the drilling of 21
wells in the Anadarko Basin with working interests ranging from 2% to 63%. Of
the 21 gas wells drilled, 15 were completed as producers and six were
unsuccessful. The Company has become increasingly active in the Mountain Front
Springer play, and is currently processing and interpreting 3-D seismic data
to help evaluate its 254,559 gross acres (128,703 net acres) in the Basin.
 
  At December 31, 1998, the Anadarko Basin represented 3% of the Company's
estimated proved reserves, and 7% of the Company's total 1998 production. The
Company intends to spend 12% of its 1999 capital expenditure budget for the
drilling of up to 24 wells, leasehold acquisitions and seismic surveys.
 
 
                                       6
<PAGE>
 
  Hugoton Embayment.  The Hugoton Embayment is the third largest producing
area for the Company and is one of the largest natural gas producing areas in
the United States. It is located in southwest Kansas, the Oklahoma panhandle
and the Texas panhandle. The Company produces natural gas from three fields in
the Hugoton Embayment: the Hugoton, the Guymon-Hugoton and Panoma.
 
  Hugoton and Guymon-Hugoton Fields.  In the Hugoton and Guymon-Hugoton
Fields, the Company has a working interest in 372 gross wells and operates 320
of these wells. The Hugoton and the Guymon-Hugoton Fields produce from the
Chase Formation. Four wells were drilled in the Hugoton Field in 1998, three
of which have been placed on production and one is awaiting completion.
 
  Panoma Field.  Panoma is the field designation for natural gas produced from
the Council Grove Formation, located beneath the Chase Formation. The Council
Grove Formation has similar reservoir rocks as the Chase Formation, however,
the productive limits are not as extensive. Presently, the Company has a
working interest in 55 gross Panoma wells and operates 51 of those wells .
 
  Natural Gas Sales Agreement.  The majority of the Company's natural gas
production from the Hugoton and Panoma Fields is sold under a long-term
contract (life-of-field) to KN Gas Supply Services, Inc. ("KNGSS"). Among
other things, this contract provides for annual re-determination of the price
to the Company. In 1998, the price was calculated each month by using the
average of four Mid-Continent index prices less a variable amount ranging from
$0.11 for an average index price of less than $0.75 to a maximum of $0.20 for
an average index price of $2.26 or higher per MMBtu. The volume of natural gas
for which the Company receives payment is reduced by one percent of the volume
as an in-kind fuel charge for moving the natural gas. By a letter agreement
dated December 18, 1997, natural gas sold under this contract between January
1, 1998 and December 31, 2000 will be priced in the same manner as in 1997.
 
  Net Profit Agreements.  The Company produces natural gas in the Guymon-
Hugoton Field and the nearby Camrick Field under a Dry Gas Agreement with
Chevron U.S.A. Inc. ("Chevron"). This agreement allows the Company to expend
funds for the operation of the properties (including the cost of drilling
wells) and to recoup the funds so expended from current production income.
Eighty percent of net operating income generated by the natural gas production
(after operational costs are recouped, including the cost of drilling and
equipping wells) is then paid to Chevron. As of December 31, 1998, the Company
had interests in 56 wells subject to the terms of this agreement. The Company
also produces natural gas in the Hugoton and Panoma Fields under various
agreements similar to the Chevron agreement, except that net operating income
is allocated 15% to the Company and 85% to other parties. At December 31,
1998, the Company had interests in an aggregate of 54 Chase Formation wells
and eight Council Grove Formation wells burdened by these other agreements.
 
  The payments made pursuant to the net profit agreements are treated as lease
operating expenses by the Company. Additional or replacement wells drilled on
the properties would be operated under the same terms and conditions as
existing wells, and would result in the commencement of the 80/20 or 85/15 net
operating income allocation after the cost of the new wells is recovered.
 
  Hugoton Gas Trust Agreement.  Natural gas rights established in 1955 to
approximately 50,000 acres in Finney and Kearny Counties, Kansas were
transferred to Plains by KN Energy, Inc. ("KN") on October 1, 1984, subject to
a payment of $0.06 per Mcf for natural gas produced from the acreage.
Quarterly payments are made by the Company to the Hugoton Gas Trust, a
publicly held trust created in 1955. Payments terminate when the estimated
gross recoverable natural gas reserves decline to 50 Bcf or less. As of
December 31, 1998, the gross proved natural gas reserves attributable to the
leases burdened by this agreement were estimated to be 127.1 Bcf. The natural
gas payments are treated as lease operating expenses by the Company. At
December 31, 1998, the Company had working interests in 196 wells that were
subject to these payments. Any additional natural gas wells drilled on this
acreage also will be subject to the $0.06 per Mcf payment of natural gas
produced.
 
  At December 31, 1998, the Hugoton Embayment represented 18% of the Company's
estimated proved reserves and 15% of the Company's total 1998 production. The
Company intends to spend 2% of its 1999 capital expenditure budget in the
Hugoton Embayment for drilling three wells and other well work.
 
 
                                       7
<PAGE>
 
  Permian Basin. The Permian Basin, located in west Texas and southeast New
Mexico, is primarily an oil province. As of December 31, 1998, the Company had
an interest in 172 gross wells located in the Permian Basin.
 
  At December 31, 1998, the Permian Basin represented 1% of the Company's
estimated proved reserves, and 3% of the Company's total 1998 production. The
Company intends to spend less than 1% of its 1999 capital expenditure budget
in the Permian Basin.
 
Gulf of Mexico Region
 
  The Company currently owns an interest in 89 leases in the Gulf of Mexico
(44 offshore Texas and 45 offshore Louisiana). The Company modified its Gulf
of Mexico strategy in 1998 to align itself with its overall plan of building a
diversified, lower risk portfolio of Gulf of Mexico properties. The Company
intends to continue to selectively (i) sell down its interest in several high
working interest prospects, (ii) farmout its interest in several high-risk
prospects, and (iii) forfeit its interest in sub-economic prospects in lieu of
paying annual rentals. As a result of its 1998 farmout efforts, four wells
will be drilled on Company leases in the first half of 1999 at no cost or risk
to the Company. Due to its sell-down effort, the Company recouped
approximately $1.6 million of previously invested capital and asset sales have
netted an additional $4.8 million.
 
  In December 1998, the Company entered into an exchange agreement with a
partner common to two producing fields. This agreement served to consolidate
each partner's interest in areas of specific interest to them. As the new
operator of three of the four blocks, the Company plans numerous
workovers/recompletions and has underwritten an ongoing 3-D seismic
acquisition program to acquire data over the area. The Company expects
delivery of the data in the summer of 1999.
 
  The Company has also entered into a three-year seismic participation
agreement with a Gulf of Mexico exploration company recognized for its
utilization of leading edge technology. This agreement covers over 1,000
blocks of 3-D seismic data located primarily in the central Gulf of Mexico in
water depths less than 300 feet. This agreement, executed in early 1999, will
enable the Company to participate for a 25% interest in any prospects
developed by this venture.
 
  At December 31, 1998, the Gulf of Mexico Region represented 4% of the
Company's estimated proved reserves and 13% of the Company's total 1998
production. The Company intends to spend 13% of its 1999 capital expenditure
budget in the Gulf of Mexico.
 
International Operations
 
  In January 1997, the Company entered into an agreement with industry
partners that provided the Company with a 45% working interest in Block 67,
covering two million gross acres in the Maranon Basin of northeastern Peru. In
March 1998, the Company acquired an additional 25% working interest. During
1998, the Company drilled and temporarily abandoned three exploratory wells,
each of which resulted in a significant oil discovery in Cretaceous and basal
Tertiary Sandstone reservoirs. The Dorado 67-35-1X encountered 71 feet of net
pay containing 14-16 degree API oil; the Pirana 67-42-1X encountered 84 feet
of net pay containing 12-21 degree API oil; the Paiche 67-20-1X encountered
179 feet of net pay containing 12-13 degree API oil and inflammable gas.
Analysis of drillstem tests through production casing indicates that these
wells are capable of per well rates of 1,000 to 5,000 barrels of oil per day
on pump. The Company has completed a feasibility study identifying potential
pipeline routes, upgrading processes, and development plans needed to initiate
production from Block 67, and is currently seeking an industry partner, with
heavy oil expertise, to assist in carrying the project forward through
continued seismic acquisition and exploratory/exploitation drilling. Current
oil prices make it uneconomic to further pursue exploration and development of
Block 67. All contractual work obligations associated with the Block 67
license have been satisfied through June 2000.
 
  At year-end 1998, the Company was engaged in exclusive contract negotiations
with Peruvian authorities to acquire Block 39, a new license area covering
approximately 1.0 million acres, located immediately to the south and east of
Block 67.
 
                                       8
<PAGE>
 
  In November 1996, the Company obtained a 55% working interest in a license
to evaluate Block 55 (A, B, and C), which encompasses 820,000 acres in the
Maranon Basin of Peru. The Company and its partner conducted seismic
reprocessing, environmental impact and engineering feasibility studies
regarding the viability of developing the Bretana Field, discovered in 1974 by
another company on this Block. Block 55 was relinquished in November 1998.
 
Certain Definitions
 
  Unless otherwise indicated in this document, natural gas volumes are stated
at the legal pressure base of the state or area in which the reserves are
located at 60(degrees) Fahrenheit. Natural gas equivalents are determined
using the ratio of six Mcf of natural gas to one barrel of crude oil,
condensate or natural gas liquids so that one barrel of oil is referred to as
six Mcf of natural gas equivalent or "Mcfe."
 
  As used in this document, the following terms have the following specific
meanings: "Mcf" means thousand cubic feet of gas, "Mcfe" means thousand cubic
feet of gas equivalent, "Mcfed" means thousand cubic feet of gas equivalent
per day, "MMcf" means million cubic feet of gas, "MMcfd" means million cubic
feet of gas per day, "MMcfe" means million cubic feet of gas equivalent,
"MMcfed" means million cubic feet of gas equivalent per day, "Bbl" means
barrel of oil, "MBbl" means thousand barrels of oil, "BOPD" means barrels of
oil per day, "MMBtu" means million British thermal units, "Bcf" means billion
cubic feet of gas and "Bcfe" means billion cubic feet of gas equivalent.
 
  With respect to information concerning the Company's working interests in
wells or drilling locations, "gross" natural gas and oil wells or "gross"
acres is the number of wells or acres in which the Company has an interest,
and "net" gas and oil wells or "net" acres are determined by multiplying
"gross" wells or acres by the Company's working interest in those wells or
acres. A working interest in an oil and natural gas lease is an interest that
gives the owner the right to drill, produce, and conduct operating activities
on the property and to receive a share of production of any hydrocarbons
covered by the lease. A working interest in an oil and gas lease also entitles
its owner to a proportionate interest in any well located on the lands covered
by the lease, subject to all royalties, overriding royalties and other
burdens, to all costs and expenses of exploration, development and operation
of any well located on the lease, and to all risks in connection therewith.
 
  "Capital expenditures" means costs associated with exploratory and
development drilling (including exploratory dry holes); leasehold
acquisitions; seismic data acquisitions; geological, geophysical and land
related overhead expenditures; delay rentals; producing property acquisitions;
and other miscellaneous capital expenditures. "Capital expenditure budget"
means an estimate prepared by management for the total expenditures
anticipated to be incurred during the subject time period. This amount can
deviate or fluctuate due to the timing of drilling of wells, environmental
considerations, acquisition of important fee, state and federal leases, and
natural gas and oil prices.
 
  A "development well" is a well drilled as an additional well to the same
horizon or horizons as other producing wells on a prospect, or a well drilled
on a spacing unit adjacent to a spacing unit with an existing well capable of
commercial production and which is intended to extend the proven limits of a
prospect. An "exploratory well" is a well drilled to find commercially
productive hydrocarbons in an unproved area, or to extend significantly a
known prospect.
 
  A "farmout" is an assignment to another party of an interest in a drilling
location and related acreage conditional upon the drilling of a well on that
location. A "farm-in" is an assignment by the owner of a working interest in
an oil and gas lease of the working interest or a portion thereof to another
party who desires to drill on the leased acreage. Generally, the assignee is
required to drill one or more wells in order to earn its interest in the
acreage. The assignor usually retains a royalty or reversionary working
interest in the lease. The assignee is said to have "farmed-in" the acreage.
 
  "Present value of estimated future net revenues" means the present value of
estimated future revenues to be generated from the production of proved
reserves calculated in accordance with the Securities and Exchange Commission
guidelines, net of estimated production and future development costs, using
prices and costs as of
 
                                       9
<PAGE>
 
the date of estimation without future escalation, without giving effect to
non-property related expenses such as general and administrative expenses,
debt service, future income tax expense and depreciation, depletion and
amortization, and discounted using an annual discount rate of 10%.
 
  A "recompletion" is the completion of an existing well for production from a
formation that exists behind the casing of the well.
 
  "Reserves" means natural gas and crude oil, condensate and natural gas
liquids on a net revenue interest basis, found to be commercially recoverable.
"Proved developed reserves" includes proved developed producing reserves and
proved developed behind-pipe reserves. "Proved developed producing reserves"
includes only those reserves expected to be recovered from existing completion
intervals in existing wells. "Proved undeveloped reserves" includes those
reserves expected to be recovered from new wells on proved undrilled acreage
or from existing wells where a relatively major expenditure is required for
recompletion.
 
Production
 
  The table below sets forth information with respect to the Company's net
interests in producing natural gas and oil properties for each of its last
three years, respectively:
 
<TABLE>
<CAPTION>
                                                Natural Gas and Oil Production
                                               --------------------------------
                                                   Year Ended December 31,
                                               --------------------------------
                                                  1996       1997       1998
                                               ---------- ---------- ----------
<S>                                            <C>        <C>        <C>
Quantities Produced and Sold
  Natural gas (Bcf)...........................       60.9       76.6       94.9
  Oil and condensate (MMBbls).................        1.9        2.2        2.0
Average Sales Price
  Natural gas ($/Mcf)......................... $     1.88 $     2.18 $     1.92
  Oil and condensate ($/Bbl).................. $    19.51 $    17.69 $    11.42
Average Production Costs ($/Mcfe)............. $     0.66 $     0.64 $     0.55
</TABLE>
 
Productive Wells
 
  The productive wells in which the Company owned a working interest as of
December 31, 1998 are described in the following table:
 
<TABLE>
<CAPTION>
                                                         Productive Wells(1)
                                                     ---------------------------
                                                       Gas Wells     Oil Wells
                                                     -------------- ------------
                                                     Gross   Net    Gross  Net
                                                     ----- -------- ----- ------
<S>                                                  <C>   <C>      <C>   <C>
Rocky Mountain Region
  Wind River........................................    25    19.48   20    6.47
  Piceance..........................................   378   220.02    0    0.00
  NE Colorado-Niobrara..............................   132    91.87    0    0.00
  Powder River......................................    17     2.00  257   74.00
  Powder River-CBM..................................   363   169.00    0    0.00
  Green River.......................................    17    10.64    0    0.00
  Uinta.............................................     0     0.00   90   76.31
Mid-Continent Region
  Arkoma............................................   147    34.96    0    0.00
  Anadarko..........................................   255    84.05   21   12.52
  Hugoton Embayment.................................   425   364.31    0    0.00
  Permian...........................................    13     9.24  106   91.39
Gulf of Mexico Region...............................    56    16.06   16    2.58
Other...............................................    12     9.00   28    0.23
                                                     ----- --------  ---  ------
    Total........................................... 1,840 1,030.63  538  263.50
                                                     ===== ========  ===  ======
</TABLE>
- --------
(1) Each well completed to more than one producing zone is counted as a single
    well. The Company has royalty interests in certain wells that are not
    included in this table.
 
                                      10
<PAGE>
 
Drilling Activity
 
  The following table summarizes the Company's natural gas and oil drilling
activities, all of which were located in the United States, with the exception
of 3 gross (2.1 net) exploratory wells drilled in Peru during 1998:
 
<TABLE>
<CAPTION>
                                                       Wells Drilled
                                           -------------------------------------
                                                  Year Ended December 31,
                                           -------------------------------------
                                              1996         1997         1998
                                           ----------- ------------ ------------
                                           Gross  Net  Gross  Net   Gross  Net
                                           ----- ----- ----- ------ ----- ------
<S>                                        <C>   <C>   <C>   <C>    <C>   <C>
Development
  Natural gas.............................   94  46.24  224  117.76  372  191.49
  Oil.....................................   43  30.48   37   25.04    8     .14
  Non-productive..........................   17   8.03   20   11.28   17    8.58
                                            ---  -----  ---  ------  ---  ------
    Total.................................  154  84.75  281  154.08  397   200.1
                                            ===  =====  ===  ======  ===  ======
Exploratory
  Natural gas.............................    8   4.05    9    4.19   13    8.52
  Oil.....................................    3   1.00    1     .33    8    3.78
  Non-productive..........................    6   3.66    8    5.09    6     3.6
                                            ---  -----  ---  ------  ---  ------
    Total.................................   17   8.71   18    9.61   27    15.9
                                            ===  =====  ===  ======  ===  ======
</TABLE>
 
  In addition, the Company was participating in 9 gross (3.96 net) wells,
which were in the process of being drilled, at December 31, 1998.
 
Reserves
 
  The table below sets forth the Company's estimated quantities of historical
proved reserves, all of which were located in the United States, and the
present values attributable to those reserves. These estimates were prepared
by the Company. The estimates as of December 31, 1996 and 1997 were reviewed
by Ryder Scott Company, an independent reservoir engineering firm. Ryder Scott
Company reviewed all of the Company's December 31, 1998 reserves, except the
reserves associated with the Powder River Basin coal bed methane play. The
Powder River Basin coal bed methane reserves were reviewed by Netherland,
Sewell & Associates, Inc., an independent reservoir engineer. The total proved
net reserves estimated by the Company as of December 31, 1996, 1997 and 1998
were within 10% of those reviewed and estimated by the engineers; however, on
a well by well basis, differences of greater than 10% may exist.
 
<TABLE>
<CAPTION>
                                          Estimated Proved Reserves
                                -----------------------------------------------
                                                 December 31,
                                -----------------------------------------------
                                      1996            1997           1998
                                ---------------- ------------------------------
                                (dollars in millions, except sales price data)
<S>                             <C>              <C>            <C>
Estimated Proved Reserves
  Natural gas (Bcf)............            674.9          851.2          912.4
  Oil and condensate (MMBbls)..             23.2           18.7            9.7
    Total (Bcfe)...............            814.3          963.2          970.3
Proved developed reserves
 (Bcfe)........................            606.3          618.3          580.4
Natural gas price as of Decem-
 ber 31 ($/Mcf)................ $           3.46 $         2.19 $         2.01
Oil price as of December 31
 ($/Bbl)....................... $          24.12 $        15.52 $         9.35
Present value of estimated fu-
 ture net revenues
  before future income taxes
   discounted at 10%(1)........ $        1,121.5 $        745.0 $        627.8
Standardized measure of dis-
 counted net cash flows(2)..... $          764.8 $        564.1 $        530.6
</TABLE>
 
                                      11
<PAGE>
 
- --------
(1) The present value of estimated future net revenues on a non-escalated
    basis is based on weighted average prices realized by the Company of $3.46
    per Mcf of natural gas and $24.12 per Bbl of oil at December 31, 1996; and
    $2.19 per Mcf of natural gas and $15.52 per Bbl of oil at December 31,
    1997 and $2.01 per Mcf of natural gas and $9.35 per Bbl of oil at December
    31, 1998.
(2) The Standardized measure of discounted net cash flows prepared by the
    Company represents the present value of estimated future net revenues
    after income taxes discounted at 10%.
 
  In accordance with applicable requirements of the Securities and Exchange
Commission (the "Commission"), estimates of the Company's proved reserves and
future net revenues are made using sales prices estimated to be in effect as
of the date of such reserve estimates and are held constant throughout the
life of the properties (except to the extent a contract specifically provides
for escalation). Estimated quantities of proved reserves and future net
revenues therefrom are affected by natural gas and oil prices, which have
fluctuated widely in recent years. There are numerous uncertainties inherent
in estimating natural gas and oil reserves and their estimated values,
including many factors beyond the control of the producer. The reserve data
set forth in this document represents only estimates. Reservoir engineering is
a subjective process of estimating underground accumulations of natural gas
and oil that cannot be measured in an exact manner. The accuracy of any
reserve estimate is a function of the quality of available data and of
engineering and geological interpretation and judgment. As a result, estimates
of different engineers, including those used by the Company, may vary. In
addition, estimates of reserves are subject to revision based upon actual
production, results of future development and exploration activities,
prevailing natural gas and oil prices, operating costs and other factors,
which revisions may be material. Accordingly, reserve estimates are often
different from the quantities of natural gas and oil that are ultimately
recovered and are highly dependent upon the accuracy of the assumptions upon
which they are based.
 
  In general, the volume of production from natural gas and oil properties
owned by the Company declines as reserves are depleted. Except to the extent
the Company acquires additional properties containing proved reserves or
conducts successful exploration and development activities, or both, the
proved reserves of the Company will decline as reserves are produced. Volumes
generated from future activities of the Company are therefore highly dependent
upon the level of success in acquiring or finding additional reserves and the
costs incurred in doing so.
 
  Reference should be made to "Supplemental Gas and Oil Information" on pages
F-21 through F-23 following the Consolidated Financial Statements included in
this document for additional information pertaining to the Company's proved
natural gas and oil reserves as of the end of each of the last three years.
During the past year, the only report concerning the Company's estimated
proved reserves that was filed with a U.S. federal agency other than the
Commission is the Annual Survey of Domestic Oil and Gas Reserves and was filed
with the Energy Information Administration ("EIA") as required by law. Only
minor differences of less than 5% in reserve estimates, which were due to
small variances in actual production versus year end estimates, have occurred
in certain classifications reported in this document as compared to those in
the EIA report.
 
 
                                      12
<PAGE>
 
Developed and Undeveloped Acreage
 
  The gross and net acres of developed and undeveloped natural gas and oil
leases held by the Company as of December 31, 1998 are summarized in the
following table. "Undeveloped Acreage" includes leasehold interests that
already may have been classified as containing proved undeveloped reserves.
 
<TABLE>
<CAPTION>
                                       Developed Acreage Undeveloped Acreage (1)
                                       ----------------- -----------------------
                                        Gross     Net       Gross        Net
                                       ----------------- -----------------------
<S>                                    <C>      <C>      <C>         <C>
Rocky Mountain Region
  Wind River..........................   14,925    9,905     125,735      70,803
  Piceance............................   46,440   29,207     105,390      49,089
  Powder River........................  125,627   58,391     804,188     318,796
  Green River.........................   15,915    5,880      22,420      14,782
  Uinta...............................   61,840   51,098     108,569      92,285
Mid-Continent Region
  Arkoma..............................   44,197   33,118      28,550      11,268
  Anadarko............................  126,984   54,192     127,575      74,511
  Hugoton Embayment...................   88,332   84,946       3,200         833
  Permian.............................   16,590   10,156       2,437         653
Gulf of Mexico Region.................  130,170   48,809     226,096     118,849
International.........................        0        0   2,054,175   1,437,923
Other.................................   34,493   28,457      89,825      43,800
                                       -------- -------- ----------- -----------
    Total.............................  705,513  414,159   3,698,160   2,233,592
                                       ======== ======== =========== ===========
</TABLE>
- --------
(1) Undeveloped acreage is leased acreage on which wells have not been drilled
    or completed to a point that would permit the production of commercial
    quantities of natural gas and oil regardless of whether such acreage
    contains proved reserves. Of the aggregate 3,698,160 gross and 2,233,592
    net undeveloped acres, 266,229 gross and 96,679 net acres are held by
    production from other leasehold acreage.
 
  Substantially all the leases summarized in the preceding table will expire
at the end of their respective primary terms unless the existing leases are
renewed or production has been obtained from the acreage subject to the lease
prior to that date, in which event the lease will remain in effect until the
cessation of production. The following table sets forth the gross and net
acres subject to leases summarized in the preceding table that will expire
during the periods indicated:
 
<TABLE>
<CAPTION>
                                                             Acres Expiring
                                                           --------------------
                                                             Gross       Net
                                                           ---------  ---------
<S>                                                        <C>        <C>
Twelve Months Ending:
  December 31, 1999.......................................   111,812     64,823
  December 31, 2000....................................... 2,227,515* 1,518,680*
  December 31, 2001.......................................   158,916     84,109
  December 31, 2002 and later.............................   915,342    458,715
</TABLE>
 
*  Of the acreage expiring in the year 2000, 2,054,175 gross (1,437,923 net)
   acres are attributable to the Company's license on Block 67 in the Republic
   of Peru. This acreage will expire only if the Company elects not to proceed
   with further activity on Block 67.
 
Overriding Royalty Interests
 
  The Company owns overriding royalty interests covering in excess of 137,401
gross acres. The majority of these overriding royalty interests are within a
range of approximately .25 to 5.0 percent.
 
                                      13
<PAGE>
 
Natural Gas and Oil Marketing and Trading
 
  The Company markets all of its own natural gas and oil production from wells
that it operates. In addition, the Company engages in natural gas trading
activities, which involve purchasing natural gas from third parties and
selling natural gas to other parties at prices and volumes that management
anticipates will result in profits to the Company. Through these natural gas
trading activities, the Company obtains knowledge and information that enables
it to more effectively market its own production.
 
  Natural Gas.  The Company has entered into a number of gas sales agreements
on behalf of itself and its industry partners with respect to the sale of
natural gas from its properties in each of the Company's basins. These
contracts vary with respect to their specific provisions, including price,
quantity, and length of contract. As of December 31, 1998, less than 3% of the
Company's production was committed to natural gas sales contracts that had
fixed prices or price ceilings. With the exception of two contracts covering
approximately 8,100 MMBtu per day of natural gas production from the Piceance
Basin through 2011, none of the contracts provides for fixed prices or price
ceilings. The Company believes that it has sufficient production from its
properties to meet the Company's delivery obligations under its existing
natural gas sales contracts.
 
  The Company has entered into a series of firm transportation agreements with
various Rocky Mountain pipeline companies. At January 1, 1999, these
transportation arrangements had terms ranging from seven months to ten years.
These transportation agreements provide the Company the opportunity to
transport a portion of its Rocky Mountain natural gas production into the Mid-
Continent area. These agreements in total provide transportation of
approximately 46% of the Company's current daily Rocky Mountain production.
 
  The Company has established a Risk Management Committee to oversee its
production hedging. The Risk Management Committee consists of the Chief
Executive Officer, the President and Chief Operating Officer, the Chief
Financial Officer and the Senior Vice President and Treasurer. With respect to
production hedge transactions, it is the policy of the Company that the Risk
Management Committee reviews and approves all such transactions.
 
  As a result of its natural gas trading activities, the Company may from
time-to-time have natural gas purchase or sales commitments without
corresponding contracts to offset these commitments, which could result in
losses to the Company. The Company currently attempts to control and manage
its exposure to these risks by monitoring and hedging its trading positions as
it deems appropriate.
 
  As of December 31, 1998, the Company had entered into financial transactions
to hedge approximately 8.0 million MMBtu of natural gas production on a short
term for the period from January 1999 through October 1999. In an effort to
eliminate price volatility from its Piceance Basin development program, the
Company entered into a series of hedges throughout 1997 to hedge an aggregate
of 123.5 million MMBtu of natural gas production from the Rocky Mountain
Region for the five-year period from March 1998 through February 2003. At
year-end 1998, 100.0 million MMBtu of these hedges remained in place.
 
  For the year ended December 31, 1998, revenues from trading activities,
which includes the cost of natural gas purchased or sold for trading purposes,
were $413.0 million, which constituted 66% of the Company's consolidated
revenues and generated a gross margin of $14.9 million. See "Management's
Discussion and Analysis of Financial Condition and Results of Operations."
 
  Oil and Condensate.  Oil, including condensate production, is generally sold
from the leases at posted field prices, plus negotiated bonuses. Marketing
arrangements are made locally with various petroleum companies. The Company
sells its own oil production to numerous customers. No single customer's total
oil purchases represented more than 10% of total Company revenues in 1998. Oil
revenues totaled $23.2 million for the year ended December 31, 1998 and
represented 4% of the Company's total revenues for that period. The Company
does not engage in oil trading activities.
 
 
                                      14
<PAGE>
 
Government Regulation of the Oil and Gas Industry
 
  General
 
  The Company's exploration, production and marketing operations are regulated
extensively at the federal, state and local levels. Natural gas and oil
exploration, development and production activities are subject to various laws
and regulations governing a wide variety of matters. For example, hydrocarbon-
producing states have statutes or regulations addressing conservation
practices and the protection of correlative rights, and such regulations may
affect the Company's operations and limit the quantity of hydrocarbons the
Company may produce and sell. Other regulated matters include marketing,
pricing, transportation, and valuation of royalty payments.
 
  Certain operations the Company conducts are on federal oil and gas leases,
which the Minerals Management Service ("MMS") administers. The MMS issues such
leases through competitive bidding. These leases contain relatively
standardized terms and require compliance with detailed MMS regulations and
orders pursuant to the Outer Continental Shelf Lands Act ("OCSLA"), which are
subject to change by the MMS. For offshore operations, lessees must obtain MMS
approval for exploration plans and development and production plans prior to
the commencement of such operations. In addition to permits required from
other agencies (such as the Coast Guard, the Army Corps of Engineers and the
Environmental Protection Agency), lessees must obtain a permit from the MMS
prior to the commencement of drilling. The MMS has promulgated regulations
requiring offshore production facilities located on the OCS to meet stringent
engineering and construction specifications. The MMS proposed additional
safety-related regulations concerning the design and operating procedures for
OCS production platforms and pipelines. These proposed regulations were
withdrawn pending further discussions among interested federal agencies. The
MMS also has issued regulations restricting the flaring or venting of natural
gas and liquid hydrocarbons without prior authorization. Similarly, the MMS
has promulgated regulations governing the plugging and abandonment of wells
located offshore and the removal of all production facilities. To cover the
various obligations of lessees on the OCS, the MMS generally requires that
lessees post substantial bonds or other acceptable assurances that such
obligations will be met. The cost of such bonds or other surety can be
substantial and there is no assurance that bonds or other surety can be
obtained in all cases. Under certain circumstances, the MMS may require any
Company operations on federal leases to be suspended or terminated. Any such
suspension or termination could materially and adversely affect the Company's
financial condition and operations.
 
  The Federal Energy Regulatory Commission ("FERC") regulates interstate
transportation of natural gas under the Natural Gas Act. Effective January 1,
1993, the Natural Gas Wellhead Decontrol Act deregulated natural gas prices
for all "first sales" of natural gas, which includes sales by the Company of
its own production. As a result, all sales of the Company's natural gas
produced in the U.S. may be sold at market prices, unless otherwise committed
by contract. Congress could reenact price controls in the future. See "--
Natural Gas and Oil Marketing and Trading".
 
  The Company's natural gas sales are affected by regulation of intrastate and
interstate natural gas transportation. In an attempt to promote competition,
the FERC has issued a series of orders that have altered significantly the
marketing and transportation of natural gas. The effect of these orders has
been to enable the Company to market its natural gas production to purchasers
other than the interstate pipelines located in the vicinity of its producing
properties. The Company believes that these changes have generally improved
the Company's access to transportation and have enhanced the marketability of
its natural gas production. To date, the Company has not experienced any
material adverse effect on natural gas marketing as a result of these FERC
orders; however, the Company cannot predict what new regulations may be
adopted by the FERC and other regulatory authorities, or what effect
subsequent regulations may have on its future natural gas marketing.
 
  The Company also is subject to laws and regulations concerning occupational
safety and health. It is not anticipated that the Company will be required in
the near future to expend amounts that are material in the aggregate to the
Company's overall operations by reason of occupational safety and health laws
and regulations, but inasmuch as such laws and regulations are frequently
changed, the Company is unable to predict the ultimate cost of compliance.
 
                                      15
<PAGE>
 
  Environmental Matters
 
  The Company, as an owner or lessee and operator of natural gas and oil
properties, is subject to various federal, state and local laws and
regulations relating to discharge of materials into, and protection of, the
environment. These laws and regulations may, among other things, impose
liability and substantial penalties on the lessee under a natural gas and oil
lease for the cost of pollution clean-up resulting from operations, subject
the lessee to liability for pollution damages, require suspension or cessation
of operations in affected areas, and impose restrictions on the injection of
liquid into subsurface aquifers that may contaminate groundwater. The Oil
Pollution Act of 1990, as amended, requires operators of offshore facilities
to provide financial assurance in the minimum amount of $35 million to cover
potential environmental cleanup and restoration costs. This amount is subject
to adjustment up to $150 million if the MMS determines such an amount is
justified by the risks from potential oil spills from covered offshore
facilities.
 
  The Company has made, and will continue to make, expenditures in its efforts
to comply with these requirements, which it believes are necessary business
costs in the oil and gas industry. The Company believes it is in substantial
compliance with applicable environmental laws and requirements and to date
such compliance has not had a material adverse effect on the earnings or
competitive position of the Company, although there can be no assurance that
significant costs for compliance will not be incurred in the future. The
Company maintains insurance coverages which it believes are customary in the
industry, although it is not fully insured against many environmental risks.
 
  Title to Properties
 
  Title to properties is subject to royalty, overriding royalty, carried, net
profits, working and other similar interests and contractual arrangements
customary in the oil and gas industry, to liens for current taxes not yet due
and to other encumbrances. As is customary in the industry in the case of
undeveloped properties, little investigation of record title is made at the
time of acquisition (other than a preliminary review of local records). The
Company reviews information concerning federal and state offshore lease blocks
prior to acquisition. Drilling title opinions are always prepared before
commencement of drilling operations; however, as is customary in the industry,
the Company does not obtain drilling title opinions on offshore leases it has
received directly from the MMS.
 
Disclosure Regarding Forward-Looking Statements
 
  This Annual Report on Form 10-K includes "forward-looking statements" within
the meaning of Section 27A of the Securities Act of 1933, as amended (the
"Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"). All statements other than statements of
historical facts included in this Annual Report on Form 10-K, including
without limitation statements under "Items 1 and 2. Business and Properties--
Core Areas of Activity", "--Reserves", "--Natural Gas and Oil Marketing and
Trading", and "--Government Regulation of the Oil and Gas Industry", "Item 3.
Legal Proceedings", and "Item 7. Management's Discussion and Analysis of
Financial Condition and Results of Operations", regarding the Company's
financial position, reserve quantities and net present values, business
strategy, plans and objectives of management of the Company for future
operations and capital expenditures, are forward-looking statements. Although
the Company believes that the expectations reflected in the forward-looking
statements and the assumptions upon which such forward-looking statements are
based are reasonable, it can give no assurance that such expectations and
assumptions will prove to have been correct. Reserve estimates are generally
different from the quantities of oil and natural gas that are ultimately
recovered. Additional statements concerning important factors that could cause
actual results to differ materially from the Company's expectations
("Cautionary Statements") are disclosed in this Annual Report on Form 10-K and
in the "Risk Factors" section of the Company's Preliminary Prospectus dated
May 6, 1998 included in the Company's Registration Statement on Form S-3 (File
Number 333-51985). All written and oral forward-looking statements
attributable to the Company or persons acting on its behalf subsequent to the
date of this Annual Report on Form 10-K are expressly qualified in their
entirety by the Cautionary Statements.
 
                                      16
<PAGE>
 
Item 3. Legal Proceedings
 
Plains Petroleum Company Tax Case
 
  The Internal Revenue Service ("IRS") has examined the federal tax returns of
Plains, a wholly owned subsidiary of the Company, for pre-merger calendar
years 1991, 1992 and 1993. The IRS issued a "Notice of Deficiency" of $5.3
million together with penalties of $1.1 million, and an undetermined amount of
interest. The IRS Notice of Deficiency resulted primarily from the IRS's
disallowance of certain net operating loss deductions claimed during the
periods under examination. These net operating losses originally had been
incurred by companies that were acquired by Tri-Power Petroleum, Inc. which
was then acquired by Plains in 1986. For years following 1993, the Company has
additional net operating loss carryforwards of approximately $30 million
related to the same acquisition, of which $28 million has been used in
subsequent income tax returns.
 
  The IRS has also examined the federal tax returns of the Company for the
periods ended July 1995, December 1995 and December 1996. The IRS issued a
letter proposing changes to tax for those periods totaling $5.7 million. The
proposed tax changes resulted primarily from the disallowance of net operating
loss and merger related deductions claimed for the periods ended December 1995
and 1996. These net operating losses are the primary issue involved with the
earlier examination of the Plains' tax returns for the calendar years 1991
through 1993.
 
  Management disagrees with the IRS position. In management's opinion, the
federal tax returns of Plains reflect the proper federal income tax liability
and the existing net operating loss carryforwards are appropriate as supported
by relevant authority. The Company is vigorously contesting these proposed
adjustments and believes its positions will be substantially sustained. In
this connection, the Company filed a petition on November 29, 1996 with the
United States Court requesting a redetermination of the IRS's Notice of
Deficiency. A trial of this matter was held in May 1998, and all post-trial
briefs have been filed. A decision is expected in the first half of 1999.
 
Kansas Ad Valorem Tax Refund
 
  Pursuant to an August 1996 decision of the United States Court of Appeals
for the District of Columbia Circuit (the "Circuit Court") and subsequent
orders of the FERC, natural gas producers who received reimbursement for
Kansas ad valorem taxes paid in the mid-1980's on top of the then maximum
lawful price for natural gas have been ordered to refund these tax
reimbursements plus interest. In 1998, in compliance with these decisions,
Plains has refunded a total of $4.25 million. This amount reflects the entire
refund obligation (principal and interest) that has been billed to Plains'
working interest. In addition, in 1998 Plains placed in escrow $1.21 million.
This escrowed amount represents the refund amount attributable to Plains'
royalty interest owners. Beginning in the second quarter of 1999 Plains will
reduce royalty payments to its current Kansas royalty owners to recoup the
amount placed in escrow. As amounts are recouped from royalty owners the
escrowed funds will be released to the gas purchaser to whom the refund is
owed. Only to the extent Plains is unsuccessful in recouping this amount from
its royalty owners or is unable to obtain FERC relief for the royalty-related
refunds not so recouped will Plains have any financial obligation for any part
of this royalty owner refund obligation. Also, Plains is a party to an appeal
challenging the FERC's orders requiring producers to pay interest on these
refund amounts. If this appeal is successful, Plains will recover
approximately $2,600,000 of the amount it has refunded.
 
Other Legal Proceedings
 
  At December 31, 1998, the Company was a party to certain other legal
proceedings, which have arisen out of the ordinary course of business. Based
on the facts currently available, in management's opinion, the liability,
individually or in the aggregate, if any, to the Company resulting from such
actions will not have a material adverse effect on the Company's consolidated
financial position or results of operations.
 
Item 4. Submission of Matters to Vote of Security Holders
 
  No matters were submitted to a vote of the Company's security holders during
the fourth quarter of the year ended December 31, 1998.
 
                                      17
<PAGE>
 
                                    PART II
 
Item 5. Market for the Registrant's Common Stock and Related Security Holders
Matters.
 
  (a) Market Information. The Company's common stock is listed on the New York
Stock Exchange under the symbol BRR. The range of high and low sales prices
for each quarterly period during the two most recent years, as reported by the
New York Stock Exchange, is as follows:
 
<TABLE>
<CAPTION>
   Quarter Ended                                                    High   Low
   -------------                                                   ------ ------
   <S>                                                             <C>    <C>
   March 31, 1997................................................. $46.00 $29.87
   June 30, 1997.................................................. $34.37 $26.62
   September 30, 1997............................................. $38.93 $25.37
   December 31, 1997.............................................. $41.06 $27.93
 
   March 31, 1998................................................. $34.94 $24.06
   June 30, 1998.................................................. $39.37 $31.06
   September 30, 1998............................................. $38.00 $18.87
   December 31, 1998.............................................. $28.93 $16.69
</TABLE>
 
  On March 15, 1999, the closing price for the Company's common stock was
$22.25 per share.
 
  (b) Holders. The number of record holders of the Company's common stock as
of March 15, 1999 was 3,581.
 
  (c) Dividends. The Company has not paid any cash dividends since its
inception. The Company's credit agreement restricts payment of dividends to
amounts that are less than 50 percent of net income. The Company anticipates
that all earnings will be retained for the development of its business and
that no cash dividends on its common stock will be declared in the foreseeable
future.
 
Item 6. Selected Financial Data
 
  The following table sets forth certain selected financial data of the
Company for each of the last five years ended December 31:
 
<TABLE>
<CAPTION>
                                           Year Ended December 31,
                                 ----------------------------------------------
                                   1998      1997     1996     1995      1994
                                 --------  -------- -------- --------  --------
                                    (in thousands, except per share data)
<S>                              <C>       <C>      <C>      <C>       <C>
Revenues.......................  $625,399  $382,600 $202,572 $128,016  $109,458
Net income (loss)..............   (93,743)   29,261   29,526   (2,240)   11,299
Net income (loss) per share....     (2.95)     0.92     1.02    (0.09)     0.46
Total assets at the end of each
 period........................   838,879   872,701  576,945  340,412   310,952
Long-term debt at the end of
 each period...................   334,067   266,437   70,000   89,000    53,000
</TABLE>
 
 
                                      18
<PAGE>
 
Item 7. Management's Discussion and Analysis of Financial Condition and
Results of Operations
 
  The following discussion should be read in conjunction with the Consolidated
Financial Statements and Notes thereto referred to in "Item 8. Financial
Statements and Supplemental Data", and "Items 1 and 2. Business and
Properties--Disclosure Regarding Forward-Looking Statements" of this Form 10-
K.
 
Liquidity and Capital Resources
 
  At December 31, 1998, the Company had cash and cash equivalents of $14.3
million, negative working capital of $5.1 million, property and equipment of
$682.2 million and total assets of $838.9 million. Compared to December 31,
1997, cash and cash equivalents decreased $0.2 million, working capital
decreased $1.9 million, net property and equipment decreased $65.0 million,
and total assets decreased $33.8 million. The decrease in property and
equipment and total assets in 1998 is principally attributed to an impairment
of oil and gas properties of $168.3 million (pre-tax) resulting from the
application of the full cost ceiling test.
 
  During 1998, the Company generated operating cash flow of $119.3 million
before working capital changes compared with $120.1 million in 1997. After
working capital changes, cash flow provided by operations was $117.0 million,
a decrease of $17.3 million from 1997.
 
  As of December 31, 1998 and 1997, respectively, the outstanding balance
under the Company's bank credit facility was $175 million and $100 million.
The Company's bank credit facility is an unsecured $250 million facility with
a consortium of six banks. As of December 31, 1998, the Company's borrowing
base was $200 million. The amount of the borrowing base under the bank credit
facility is determined by the lenders with reference to the Company's proved
reserves and the Company's projected cash requirements. The Company's lenders
are currently reviewing the December 31, 1998 reserve report to determine
current collateral value. At the conclusion of this review, the borrowing base
could change. At the time of borrowing funds under the bank credit facility,
interest begins to accrue on those funds, at the Company's election, at either
the London Interbank Eurodollar Rate (LIBOR) plus a spread ranging from 0.185
percent to 0.625 percent (depending on the Company's senior debt rating and
the ratio of the Company's outstanding indebtedness to its earnings before
interest, taxes and depreciation, depletion and amortization) or at the United
States prime rate of interest. The Company is required to pay interest on a
quarterly basis until the entire outstanding balance matures on September 30,
2002. As of March 10, 1999, the Company had reduced the outstanding balance of
this credit facility by $25 million to $150 million.
 
 Capital Expenditures
 
  During 1998 the Company invested $205.8 million in oil and gas properties
and other equipment, including acquisitions and exploration and development
programs. The 1998 acquisition program consisted principally of purchasing
additional interests in the Block 67 license located in the Republic of Peru
and acquiring leases in the Powder River Basin coal bed methane project.
Exploration and development programs were concentrated in the Anadarko,
Piceance, Powder River (coal bed methane project) and Wind River Basins, the
Gulf of Mexico and the Republic of Peru.
 
  The Company's capital expenditure budget for 1999 has been established at
$92 million. In response to low product prices and the desire to limit debt
levels, the Company decreased its 1999 capital expenditure budget by $113.8
million from the 1998 capital expenditure level. Approximately 51 percent of
the 1999 budget will be concentrated on drilling and completion of proved
undeveloped reserves on existing properties. The Company's 1999 exploration
and development program will be focused in the Rocky Mountain Region ($66
million), Mid-Continent ($14 million) and the Gulf of Mexico ($12 million).
Due to lower oil prices, the Company has limited its activities in its
international project located in the Republic of Peru. The Company's
exploration and development programs are discussed in "Business and
Properties" under Items 1 and 2 of this Form 10-K.
 
                                      19
<PAGE>
 
 Reserves and Pricing
 
  Proved reserves at year-end 1998 were 970.3 billion cubic feet of natural
gas equivalents (Bcfe), approximately a one percent increase over the
Company's December 31, 1997 proved reserves. Approximately 98 percent of the
reserve additions were generated through exploration and development projects
and two percent of the reserve additions were provided by property
acquisitions. Proved reserves were reduced by production of approximately
107.1 Bcfe, sales of properties with reserves of 11.6 Bcfe, and downward
revisions of previous estimates of 100.0 Bcfe. Lower year-end prices and lower
than expected performance of certain properties contributed to the adjustments
of previous estimates. During 1998, as a result of its drilling and
acquisition activities net of sales and revisions, the Company's reserve
replacement was 107 percent of total production.
 
  As of year-end 1998, the standardized measure of discounted future net cash
flows decreased $33.5 million, or six percent, from 1997 primarily due to
reserve revisions and decreases in oil and gas prices offset by reserve
quantity additions. Reserve extensions and discoveries added $115 million to
the standardized measure. The changes in year-end sales prices and production
costs from 1997 to 1998 decreased the standardized measure of discounted
future net cash flows by $103 million. Reserves produced during the year and
sales of proved reserves, net of purchases, reduced the standardized measure
by $147 million and $7 million, respectively. The Company's standardized
measure of discounted future net cash flows is sensitive to gas prices in the
current volatile commodities market.
 
  Oil and natural gas prices fluctuate throughout the year. As of December 31,
1998, the Company was receiving weighted average prices of $9.35 per barrel of
oil and $2.01 per Mcf of gas. These lower prices caused the Company to
recognize a pre-tax "ceiling test" impairment of $129 million on its U.S.
properties. In addition, the Company recognized a pre-tax impairment of $39
million on its exploration projects in Peru. A further decline in prices would
have a material effect on the discounted future net cash flows which, in turn,
could impact the "ceiling test" for the Company's oil and gas properties
accounted for under the full cost method in subsequent periods.
 
  From time to time the Company uses swaps to hedge the sales price of its
natural gas and oil. In a typical swap agreement, the Company and a
counterparty will enter into an agreement whereby one party will pay a fixed
price and the other will pay an index price on a specified volume of
production during a specified period of time. Settlement is made by the
parties for the difference between the two prices at approximately the same
time as the physical transactions. The intent of hedging activities is to
reduce the volatility associated with the sales prices of the Company's
natural gas and oil production. Although hedging transactions associated with
the Company's production reduce the Company's exposure to declines in
production revenue as a result of unfavorable price changes, these
transactions also limit the Company's ability to benefit from favorable price
changes. As of December 31, 1998, the Company held positions to hedge 108
million MMBtu of the Company's future natural gas production through February
2003. The Company currently has no oil swaps in place.
 
  The Company's drilling and acquisition activities have increased its reserve
base and its productive capacity and, therefore, its potential cash flow.
Lower gas prices may adversely affect cash flow. The Company intends to
continue to acquire and develop oil and gas properties in its areas of
activity as dictated by market conditions and financial ability. The Company
retains flexibility to participate in oil and gas activities at a level that
is supported by its cash flow and financial ability. Management believes that
the Company's borrowing capacities and cash flow are sufficient to fund its
currently anticipated activities. The Company intends to continue to use
financial leverage to fund its operations as investment opportunities become
available on terms that management believes warrant investment of the
Company's capital resources.
 
 Year 2000
 
  The following Year 2000 statements constitute a Year 2000 Readiness
Disclosure within the meaning of the Year 2000 Information and Readiness
Disclosure Act of 1998.
 
                                      20
<PAGE>
 
  Year 2000 issues result from the inability of certain electronic hardware
and software to accurately calculate, store or use a date subsequent to
December 31, 1999. These dates can be erroneously interpreted in a number of
ways, e.g., the year 2000 could be interpreted as the year 1900. This
inability could result in a system failure or miscalculations that could in
turn cause operational disruptions. These issues could affect not only
information technology ("IT") systems, such as computer systems used for
accounting, land, engineering and seismic processing, but also systems that
contain embedded chips.
 
  The Company has completed an assessment of its IT systems to determine
whether these systems are Year 2000 compliant. The Company has determined that
these systems are either compliant or with relatively minor modifications or
upgrades (many of which would have been made in any event as part of the
Company's continuing effort to enhance its IT systems) will be compliant. All
necessary modifications and upgrades and the testing thereof are expected to
be completed by the end of the first quarter of 1999.
 
  The Company is assessing its non-information systems to ascertain whether
these systems contain embedded computer chips that will not properly function
subsequent to December 31, 1999. These systems include office equipment, the
automatic wellhead equipment used to operate wells in the Piceance Basin and
southwest Kansas, the Company-owned gas gathering pipelines in the Piceance
Basin, the Uinta Basin and in southwest Kansas, and the Company's gas
processing plant in the Piceance Basin. Except for certain portions of the
southwest Kansas wellhead automation equipment, all of these systems have been
determined to be Year 2000 compliant. The Company has completed the
modifications and testing of the southwest Kansas wellhead automation
equipment and determined that the equipment is Year 2000 compliant. A Company-
wide test will be made in the second quarter of 1999 to verify that all IT
systems are Year 2000 compliant.
 
  To date, the Company has relied upon its internal staff to assess its Year
2000 readiness. Outside consultants have been and will be used for limited
projects such as the modification and testing of the southwest Kansas wellhead
automation equipment. The costs associated with assessing the Company's Year
2000 internal compliance and related systems modification, upgrading and
testing are not currently expected to exceed $250,000. Costs incurred through
December 31, 1998 have been minimal.
 
  The Company is in the process of communicating with certain of its
significant suppliers, service companies, gas gatherers and pipelines,
electricity providers and financial institutions to determine the
vulnerability of the Company to third parties' failure to address their Year
2000 issues. While the Company has not yet received definitive responses
indicating all such entities are Year 2000 compliant, it has not received
information suggesting the Company is vulnerable to potential Year 2000
failures by these parties. These communications are expected to continue into
the first quarter of 1999. At this time the Company has not developed any
contingency plans to address third party non-compliance with Year 2000
matters. However, should its communications with any third parties indicate
significant vulnerability, development of contingency plans will be
considered.
 
  The Company does not anticipate any significant disruptions of its
operations due to Year 2000 issues. Among the potential "worst case" problems
the Company could face would be the loss of electricity used to power well
pumps and compressors that would result in wells being shut-in, or the
inability of a third party gas gathering company or pipeline to accept gas
from the Company's wells or gathering lines which would also result in the
Company's wells being shut-in. A disruption in production would result in the
loss of income.
 
Results of Operations
 
 1998 vs. 1997
 
  In 1998, the Company had a net loss of $93.7 million ($2.95 per share),
which includes a pre-tax impairment of $168.3 million, compared to net income
of $29.3 million ($.92 per share) in 1997. Excluding the effects of the
impairment, the Company's net income in 1998 after taxes would have been $11.7
million ($.36 per share).
 
                                      21
<PAGE>
 
  Revenues increased $242.8 million (63 percent) to $625.4 million in 1998.
Operating expenses, which includes the impairment of $168.3 million, increased
131 percent to $774.9 million. Excluding the effects of the impairment,
operating expenses increased 81 percent. In 1998, oil and gas production
revenue decreased one percent to $205.5 million and trading revenues increased
141 percent to $413 million. Lease operating expenses increased $0.7 million
and depreciation, depletion and amortization increased $29.7 million.
 
  Production revenues decreased $1.4 million to $205.5 million primarily due
to a 41 percent decrease in oil revenues. This decrease in oil revenues is the
result of a 35 percent decline in average oil price from $17.69 per Bbl in
1997 to $11.42 per Bbl in 1998 and a nine percent decrease in oil production.
Gas production increased 24 percent from 76.6 Bcf in 1997 to 94.9 Bcf in 1998
which was partially offset by a 12 percent decline in average gas prices which
dropped from $2.18 per Mcf in 1997 to $1.92 per Mcf in 1998. Gas production
accounted for 89 percent of total production on an energy equivalent basis.
The Wind River and Piceance Basins properties accounted for 24 percent and 21
percent, respectively, of total gas production. The Powder River and Uinta
Basins properties accounted for 35 percent and 23 percent, respectively, of
total oil production.
 
  Lease operating expenses of $58.6 million averaged $.55 per Mcfe ($3.28 per
BOE) compared to $.64 per Mcfe ($3.86 per BOE) in 1997. Depreciation,
depletion and amortization increased $29.7 million primarily due to production
increases. During 1998, depletion and amortization on oil and gas production
was provided for at an average rate of $.91 per Mcfe ($5.49 per BOE) compared
to an average rate of $.77 per Mcfe ($4.60 per BOE) in 1997. As a result of
the required full cost ceiling test, the Company recognized a pre-tax
impairment of the net book value of its U.S. oil and gas properties of $129
million, and a pre-tax impairment of the Company's investment in its
international oil and gas exploration project, located in the Republic of
Peru, of $39 million. The impairment was caused principally by low year-end
oil and gas prices.
 
  The gross margin on trading activities increased $9.0 million to $14.9
million in 1998. Gas trading volumes increased 157 percent to 217.5 Bcf in
1998.
 
  The Company enters into hedging arrangements to reduce its exposure to price
risks associated with commodities markets. Although hedging transactions
associated with its production reduce the Company's exposure to losses as a
result of unfavorable price changes, the transactions also limit the Company's
ability to benefit from favorable price changes. During 1998, the Company
hedged 31.3 Bcf (33 percent) of its gas production for a net cost of $0.7
million. Oil production was not hedged during 1998.
 
  General and administrative expenses of $24.5 million reflect a one percent
decrease compared to 1997. The 1998 amount is net of $6.3 million of operating
fee recoveries compared to a $5.0 million recovery in 1997.
 
  Interest expense increased significantly from $13.2 million in 1997 to $20.9
million in 1998 primarily as a result of the increase in long-term debt.
 
  Income tax expense decreased by $73.7 million as a result of the Company's
net loss for the year.
 
 1997 vs. 1996
 
  In 1997, the Company adopted Statement of Financial Accounting Standards No.
128, "Earnings Per Share" (SFAS No. 128). As prescribed by SFAS No. 128,
earnings per share amounts for 1996 have been restated. References to per
share amounts are based on diluted shares outstanding.
 
  During 1997, the Company earned net income of $29.3 million ($.92 per share)
compared to $29.5 million ($1.02 per share) in 1996.
 
  Revenues increased $180 million (89 percent) to $382.6 million in 1997.
Operating expenses increased 112 percent to $335.4 million. In 1997, oil and
gas production revenue increased 36 percent to $206.9 million, and trading
revenues increased 265 percent to $171.1 million. Lease operating expenses
increased $10.3 million and depreciation, depletion and amortization increased
$26.6 million.
 
                                      22
<PAGE>
 
  Production revenues increased $55.2 million to $206.9 million primarily due
to a 46 percent increase in gas revenues. The increased gas revenues are a
result of an increase in the average gas price from $1.88 per Mcf in 1996 to
$2.18 per Mcf in 1997 and an increase in gas production of 15.7 Bcf (26
percent) for 1997. Gas production accounted for 85 percent of total production
on an energy equivalent basis. The Wind River Basin and Piceance Basin
properties accounted for 26 percent and 21 percent, respectively, of total gas
production. The Powder River Basin and Uinta Basin properties accounted for 40
percent and 23 percent, respectively, of total oil production.
 
  Lease operating expenses of $57.9 million averaged $.64 per Mcfe ($3.86 per
BOE) compared to $.66 per Mcfe ($3.95 per BOE) in 1996. Depreciation,
depletion and amortization increased $26.6 million primarily due to production
increases. During 1997, depletion and amortization on oil and gas production
was provided at an average rate of $.77 per Mcfe ($4.60 per BOE) compared to
an average rate of $.59 per Mcfe ($3.54 per BOE) in 1996.
 
  The gross margin on trading activities increased $3.1 million to $5.9
million in 1997. Gas trading volumes increased 183 percent to 84.8 million
MMBtu in 1997.
 
  The Company enters into hedging arrangements to reduce its exposure to price
risks associated with commodities markets. Although hedging transactions
associated with its production reduce the Company's exposure to losses as a
result of unfavorable price changes, the transactions also limit the Company's
ability to benefit from favorable price changes. During 1997, the Company
hedged 18.6 Bcf (24 percent) of its gas production for a net cost of $4.3
million. No oil was hedged during 1997.
 
  General and administrative expenses of $24.9 million reflect an increase of
47 percent over the previous year. The 1997 amount is net of $5.0 million of
operating fee recoveries compared to a $4.0 million recovery in 1996. The 1997
increase in general and administrative expenses is a result of the Company's
continued growth and expansion. Interest expense increased significantly from
$3.7 million in 1996 to $13.2 million in 1997 due primarily to the issuance of
$150 million of long term bonds in February 1997.
 
  Income tax expense increased by 20 percent in 1997 to $17.9 million. The
Company's effective financial statement tax rate in 1997 was 38.0 percent
compared to 33.6 percent in 1996.
 
Item 7a. Quantitative and Qualitative Disclosures About Market Risk
 
Commodity Price Risk
 
  The Company uses commodity derivative financial instruments, including
futures and swaps, to reduce the effect of natural gas price volatility on a
portion of its natural gas production. Commodity swap agreements are generally
used to fix a price at the natural gas market location or to fix a price
differential between the price of natural gas at Henry Hub and the price of
gas at its market location. Settlements are based on the difference between a
fixed and a variable price as specified in the agreement. The following table
summarizes the Company's derivative financial instrument position on its
natural gas production as of December 31, 1998. The fair value of these
instruments reflected in the table below is the estimated amount that the
Company would receive or pay to settle the contracts as of December 31, 1998.
Actual settlement of these instruments when they mature will differ from these
estimates reflected in the table. Gains or losses realized from these
instruments hedging the Company's production are expected to be offset by
changes in the actual sales price received by the Company for its natural gas
production.
 
<TABLE>
<CAPTION>
   For the year         MMBtu          Price Range Per MMBtu          Fair Value
   ------------      -----------       ---------------------       ----------------
   <S>               <C>               <C>                         <C>
   1999--2003        108 million           $1.71--$2.25            $(13.25) million
</TABLE>
 
                                      23
<PAGE>
 
  The Company also uses commodity derivative financial instruments in its
trading activities to hedge price fluctuations to lock in margins on all of
its fixed price trading positions and to hedge the value of stored gas. The
following table summarizes the Company's derivative financial instrument
position on its natural gas trading activities as of December 31, 1998. The
fair value of these instruments reflects the estimated amounts that the
Company would receive or pay to settle the contracts as of December 31, 1998.
Actual settlement of these instruments as they mature will differ from these
estimates. Gains or losses realized from these instruments hedging the
Company's production are expected to be offset by corresponding changes in the
settlement value of actual natural gas traded.
 
<TABLE>
<CAPTION>
   For the year          MMBtu           Price Range Per MMBtu         Fair Value
   ------------      -------------       ---------------------       --------------
   <S>               <C>                 <C>                         <C>
   1999--2001        294.8 million           $1.46--$2.77            $27.33 million
</TABLE>
 
Interest Rate Risk
 
  The Company's use of fixed and variable rate long-term debt to partially
finance capital expenditures exposes the Company to market risk related
changes in interest rates. The following table presents principal and related
average interest rates by year of maturity for the Company's debt obligations
and their indicated fair market value at December 31, 1998.
 
<TABLE>
<CAPTION>
                                      Expected Maturity /Redemption
                               ------------------------------------------------
                                                                          Fair
                               1999  2000  2001   2002   2003 Thereafter Value
                               ----  ----  ----  ------  ---- ---------- ------
                                          (Dollars in millions)
   <S>                         <C>   <C>   <C>   <C>     <C>  <C>        <C>
   Long-term debt:
     Fixed rate............... $5.4  $4.4  $3.4  $  1.3  --     $150.0   $158.8
     Average Interest Rate.... 7.56% 7.56% 7.56%   7.55% --       7.55%
     Variable rate............  --    --    --   $175.0  --        --    $175.0
     Average Interest Rate....  --    --    --    5.625% --        --
</TABLE>
 
Item 8. Financial Statements and Supplemental Data
 
  The Consolidated Financial Statements and schedules that constitute Item 8
are attached at the end of this Annual Report on Form 10-K. An index to these
Consolidated Financial Statements and Schedules is also included in Item 14(a)
of this Annual Report on Form 10-K.
 
Item 9. Changes in and Disagreements with Accountants on Accounting and
Financial Disclosures
 
  Not applicable.
 
                                      24
<PAGE>
 
                                   PART III
 
Item 10. Directors and Executive Officers of the Company
 
  The directors and executive officers of the Company, their respective ages
and positions, and the year in which each director was first elected, are set
forth in the following table. Additional information concerning each of these
individuals follows the table:
 
<TABLE>
<CAPTION>
                                                                      Director
                             Age      Position With the Company        Since
                             ---      -------------------------       --------
<S>                          <C> <C>                                  <C>
William J.                    70 Chairman of the Board, Chief
 Barrett(1)(6)(8)...........      Executive Officer, and a Director     1983
 
C. Robert                     65 Director
 Buford(1)(2)(3)(4)(5)......                                            1983
 
Derrill                       60 Director
 Cody(1)(2)(3)(4)(5)........                                            1995
 
James M.                      64 Director
 Fitzgibbons(3)(4)(5)(7)....                                            1987
 
William W. Grant,             66 Director
 III(3)(4)(5)...............                                            1995
 
J. Frank Keller(6)..........  55 Chief Financial Officer, Executive
                                  Vice President, and a Director        1983
 
A. Ralph Reed...............  61 Chief Operating Officer, President
                                  and a Director                        1990
 
James T. Rodgers(3)(4)(5)...  64 Director                               1993
 
Philippe S.E.                 58 Director
 Schreiber(1)(2)(3)(4)(5)...                                            1985
 
Joseph P. Barrett(8)........  45 Senior Vice President--Land             --
 
Peter A. Dea................  45 Executive Vice President--
                                  Exploration                            --
 
Bryan G. Hassler............  40 Vice President--Marketing               --
 
Robert W. Howard............  44 Senior Vice President--Investor
                                  Relations, Corporate Development
                                  and Treasurer                          --
 
Eugene A. Lang, Jr..........  45 Senior Vice President and General
                                  Counsel; and Secretary                 --
 
Logan Magruder, III.........  42 Vice President--Operations              --
 
Maurice F. Storm............  38 Vice President and General Manager--
                                  Mid- Continent Region                  --
</TABLE>
- --------
(1) Member of the Executive Committee of the Board of Directors.
(2) Member of the Board Planning and Nominating Committee of the Board of
    Directors.
(3) Member of the Audit Committee of the Board of Directors.
(4) Member of the Compensation Committee of the Board of Directors.
(5) Member of the Succession Committee of the Board of Directors
(6) Mr. Keller and Mr. Barrett are brothers-in-law.
(7) Mr. Fitzgibbons served as a Director of the Company from July 1987 until
    October 1992. He was re-elected to the Board of Directors in January 1994.
(8) Joseph P. Barrett is the son of William J. Barrett.
 
  William J. Barrett has continuously served as Chief Executive Officer of the
Company since December 1983, except for the period from July 1, 1997 through
March 23, 1998. He has served as Chairman of the Board since September 1994,
and Mr. Barrett served as President from December 1983 through September 1994.
From January 1979 to February 1982, Mr. Barrett was an independent oil and gas
operator in the western United States in association with Aeon Energy, a
partnership composed of four sole proprietorships. From 1971 to 1978, Mr.
Barrett served as Vice President--Exploration and a director of Rainbow
Resources, Inc., a publicly held
 
                                      25
<PAGE>
 
independent oil and gas exploration company that merged with a subsidiary of
the Williams Companies in 1978. Mr. Barrett served as President, Exploration
Manager and Director for B&C Exploration from 1969 until 1971 and was chief
geologist for Wolf Exploration Company, now known as Inexco Oil Co., from 1967
to 1969. He was an exploration geologist with Pan-American Petroleum
Corporation from 1963 to 1966 and worked as an exploration geologist, a
petroleum geologist and a stratigrapher for El Paso Natural Gas Co. at various
times from 1958 to 1963. Mr. Barrett intends to retire as Chairman of the
Board and Chief Executive Officer in March 2000.
 
  C. Robert Buford has been a director of the Company since December 1983 and
served as Chairman of the Board of Directors from December 1983 through March
1994. Mr. Buford has been President, Chairman of the Board and controlling
shareholder of Zenith Drilling Corporation ("Zenith"), Wichita, Kansas, since
February 1966. Zenith owns approximately 1.9 percent of the Company's Common
Stock. Since 1993, Mr. Buford has served as a director of Encore Energy, Inc.,
a wholly-owned subsidiary of Zenith engaged in the marketing of natural gas.
Mr. Buford is also a member of the Board of Directors of Intrust Financial
Corporation, a bank holding company.
 
  Derrill Cody has been a director of the Company since July 1995. From May
1990 until July 1995, Mr. Cody served as a director of Plains, which merged
with a subsidiary of the Company on July 18, 1995. Since January 1990, Mr.
Cody has been an attorney in private practice in Oklahoma City, Oklahoma. From
1986 to 1990, he was Executive Vice President of Texas Eastern Corporation,
and from 1987 to 1990 he was the Chief Executive Officer of Texas Eastern
Pipeline Company. He has been a director of the General Partner of TEPPCO
Partners, L.P. since January 1990.
 
  James M. Fitzgibbons has been a director of the Company since January 1994,
and previously served as a director of the Company from July 1987 until
October 1992. From October 1990 through December 1997, Mr. Fitzgibbons was
Chairman and Chief Executive Officer of Fieldcrest Cannon, Inc. From January
1986 until October 1990, Mr. Fitzgibbons was President of Amoskeag Company.
Prior to 1986, he was President of Howes Leather Company. Mr. Fitzgibbons is
also member of the Board of Directors of Lumber Mutual Insurance Company, and
he is a Trustee of Dreyfus Laurel Funds, a series of mutual funds.
 
  William W. Grant, III has served as a director of the Company since July
1995. From May 1987 until July 1995, Mr. Grant served as a director of Plains.
He has been an advisory director of Colorado National Bank since 1993. He was
a director of Colorado National Bankshares, Inc. from 1982 to 1993 and the
Chairman of the Board of Colorado National Bank of Denver from 1986 to 1993.
He served as the Chairman of the Board of Colorado Capital Advisors from 1989
through 1994.
 
  J. Frank Keller has been an Executive Vice President, and a director of the
Company since December 1983 and Chief Financial Officer of the Company since
July 1995. From December 1983 through June 1997, he also served as Secretary.
Mr. Keller was the President and a co-founder of Myriam Corp., an
architectural design and real estate development firm beginning in 1976, until
it was reorganized as Barrett Energy in February 1982.
 
  A. Ralph Reed was elected President and Chief Operating Officer of the
Company on March 23, 1998. He was an Executive Vice President of the Company
from November 1989 through March 23, 1998 and he has been a director since
September 1990. From 1986 to 1989, Mr. Reed was an independent oil and natural
gas operator in the Mid-Continent region of the United States, including the
period from January 1988 to November 1989 when he acted as a consultant to
Zenith. From 1982 to 1986, Mr. Reed was President and Chief Executive Officer
of Cotton Petroleum Corporation ("Cotton"), a wholly owned exploration and
production subsidiary of United Energy Resources, Inc. Prior to joining Cotton
in 1980, Mr. Reed was employed by Amoco from 1962, holding various positions
including Manager of International Production, Division Production Manager and
Division Engineer.
 
  James T. Rodgers has been a director of the Company since November 1993. Mr.
Rodgers served as the President, Chief Operating Officer and a director of
Anadarko Petroleum Corporation ("Anadarko") from 1986
 
                                      26
<PAGE>
 
through 1992. Prior to 1986, Mr. Rodgers was employed in other capacities by
Anadarko and Amoco. Mr. Rodgers taught Petroleum Engineering at the University
of Texas in Austin in 1958 and at Texas Tech University in Lubbock from 1958
to 1961. Mr. Rodgers served as a Director of Louis Dreyfus Natural Gas
Corporation until October 1997, and he currently serves as a director of
Khanty Mansysk Oil Corporation, a privately held exploration and production
company operating in the former Soviet Union.
 
  Philippe S.E. Schreiber has been a director of the Company since November
1985. Mr. Schreiber is an independent lawyer and business consultant. From
August 1985 through December 1998 he was a partner of, or of counsel to, the
law firm of Walter, Conston, Alexander & Green, P.C. in New York, New York.
From 1988 to mid-1992, he also was the Chairman of the Board and a principal
shareholder of HSE, Inc., d/b/a Manhattan Kids Limited, a privately owned
corporation. Mr. Schreiber is a Director of the United States affiliates of
The Mayflower Corporation plc., a British publicly traded company involved in
the business of supplying parts and components to auto and truck
manufacturers.
 
  Joseph P. Barrett has been Senior Vice President--Land since March 1999. He
had served as Vice President--Land from March 1995 through February 1999, and
he has held various positions in the Company's Land Department since 1982.
 
  Peter A. Dea was elected Executive Vice President--Exploration effective
December 11, 1998. He served as Senior Vice President--Exploration of the
Company from June 1996 through December 11, 1998. He held various exploration
geologist positions with the Company from February 1994 through June 1996. Mr.
Dea served as President of Nautilus Oil and Gas Company in Denver, Colorado
from 1992 through 1993. From 1982 until 1991, Mr. Dea served in various
positions with Exxon Company USA as a Geologist in the Production Department
in Corpus Christi, Texas and as a Senior Geologist and Supervisor in the
Exploration Department in Denver, Colorado. Mr. Dea served as adjunct
Professor of Geology at Western State College, Gunnison, Colorado in the
spring semesters of 1980 and 1982.
 
  Bryan G. Hassler has been Vice-President--Marketing of the Company since
December 1996. He joined the Company as Director of Marketing in August 1994.
Prior to joining the Company, Mr. Hassler was Marketing Coordinator for
Questar Corporation's Marketing Group and Mr. Hassler held various engineering
positions with Questar Corporation's exploration and production and pipeline
groups.
 
  Robert W. Howard was elected Senior Vice President--Investor Relations,
Corporate Development and Treasurer on February 25, 1999. He had been Senior
Vice President of the Company from March 1992 through February 25, 1999. Mr.
Howard served as the Executive Vice President--Finance from December 1989
until March 1992 and served as Vice President--Finance of the Company from
December 1983 until December 1989. Mr. Howard has been the Treasurer of the
Company since March 1986. During 1982, Mr. Howard was a Manager/Accountant
with Weiss & Co., a certified public accounting firm.
 
  Eugene A. Lang, Jr. has been Senior Vice President--General Counsel of the
Company since September 1995. In June 1997, Mr. Lang was also elected
Secretary. Mr. Lang served as Senior Vice President, General Counsel and
Secretary of Plains from May 1994 to July 1995, and from October 1990 to May
1994 he served as Vice President, General Counsel and Secretary of Plains.
From September 1986 to September 1990 he was an associate with the Houston,
Texas law firm of Vinson & Elkins. From 1984 to 1986, he was General Attorney
and Assistant Secretary of KN. From 1978 to 1984, he was an attorney with KN.
 
  Logan Magruder III was elected Vice President--Operations in April 1998.
From October 1997 through April 1998 he was Vice President--Corporate
Relations and Business Development. From December 1996 through October 1997 he
served as Manager of Operations in the Company's Gulf of Mexico Division. From
November 1995 to December 1996, Mr. Magruder served as Director of Engineering
and Operations for Scana Petroleum and from 1991 to 1993, Mr. Magruder served
as a Vice President of Torch Energy. From 1980 to 1991, Mr. Magruder held
petroleum engineering and corporate relations positions with other exploration
and production companies.
 
                                      27
<PAGE>
 
  Maurice F. Storm has been Vice President and General Manager of the
Company's Mid-Continent Division since July 1996. From October 1991 to July
1996 Mr. Storm was retained by the Company as a consultant to develop drilling
opportunities in the Anadarko and Arkoma Basins. From September 1984 through
October 1991 Mr. Storm worked for other independent exploration and production
companies in various exploration geologist and management positions.
 
Section 16(a) Beneficial Ownership Reporting Compliance
 
  Section 16(a) of the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), requires the Company's directors, executive officers and
holders of more than 10% of the Company's common stock to file with the
Securities and Exchange Commission initial reports of ownership and reports of
changes in ownership of common stock and other equity securities of the
Company. The Company believes that during the fiscal year ended December 31,
1998, its officers, directors and holders of more than 10% of the Company's
common stock complied with all Section 16(a) filing requirements. In making
these statements, the Company has relied upon the written representations of
its directors and officers.
 
                                      28
<PAGE>
 
Item 11. Executive Compensation
 
Summary Compensation Table
 
  The following table sets forth in summary form the compensation received
during each of the Company's last three completed years by the Chief Executive
Officer and former Chief Executive Officer of the Company and by the four
other most highly compensated executive officers whose compensation exceeded
$100,000 during the year ended December 31, 1998. The figures in the following
table are for fiscal years ended December 31, 1998, 1997, and 1996:
 
                          Summary Compensation Table
 
<TABLE>
<CAPTION>
                                                              Long Term Compensation
                                                          -------------------------------
                                                                  Awards          Payouts
                                                          ----------------------- -------
                                                   Other
                                                  Annual  Restricted  Securities
                                                  Compen-   Stock     Underlying   LTIP    All Other
   Name and Principal    Fiscal  Salary   Bonus   sation   Award(s)  Options/SARs Payouts Compensation
        Position          Year    ($)     ($)(1)  ($)(2)    ($)(3)      (#)(4)    ($)(5)     ($)(6)
   ------------------    ------ -------- -------- ------- ---------- ------------ ------- ------------
<S>                      <C>    <C>      <C>      <C>     <C>        <C>          <C>     <C>
William J. Barrett(7)...  1998  $306,512 $145,000   -0-      -0-       110,000      -0-      $9,600
 Chairman of the Board,
 Chief                    1997  $215,000 $250,000   -0-      -0-        50,000      -0-      $9,500
 Executive Officer, and
 a director               1996  $255,417 $150,000   -0-      -0-       100,000      -0-      $7,913
 
Paul M. Rady(8).........  1998  $109,730 $ 95,000   -0-      -0-           -0-      -0-      $6,075
 Former President,
 former Chief             1997  $266,252 $160,000   -0-      -0-        50,000      -0-      $9,500
 Executive Officer, and
 former director          1996  $206,667 $ 63,000   -0-      -0-        52,000      -0-      $8,138
 
A. Ralph Reed(9)........  1998  $272,250 $ 70,000   -0-      -0-        60,000      -0-      $9,600
 President, Chief
 Operating                1997  $217,500 $120,000   -0-      -0-           -0-      -0-      $9,500
 Officer, and a director  1996  $207,917 $ 54,000   -0-      -0-        40,000      -0-      $7,988
 
J. Frank Keller.........  1998  $177,131 $ 50,000   -0-      -0-        35,000      -0-      $9,600
 Executive Vice
 President,               1997  $165,768 $ 90,000   -0-      -0-        26,700      -0-      $9,500
 Chief Financial
 Officer, and a director  1996  $155,938 $ 40,000   -0-      -0-        19,200      -0-      $8,222
 
Peter A. Dea............  1998  $167,708 $ 35,000   -0-      -0-       142,000      -0-      $9,600
 Executive Vice
 President--              1997  $153,750 $ 65,000   -0-      -0-         7,500      -0-      $8,838
 Exploration              1996  $134,625 $ 25,000   -0-      -0-        30,000      -0-      $7,224
 
Bryan G. Hassler........  1998  $143,950 $ 50,000   -0-      -0-        16,000      -0-      $8,636
 Vice President--
 Marketing                1997  $135,000 $ 50,000   -0-      -0-           -0-      -0-      $9,500
                          1996  $ 95,676 $ 33,493   -0-      -0-        18,000      -0-      $5,085
</TABLE>
- --------
(1) The dollar value of bonus (cash and non-cash) paid during the year
    indicated. On February 26, 1999, the Compensation Committee awarded a cash
    bonus of $121,000 to Mr. Hassler in accordance with the Company's
    Marketing and Trading Group Bonus Plan based on 1998 results of the
    Marketing and Trading Group. No bonuses were paid to the other named
    Executive Officers.
(2) During the period covered by the Table, the Company did not pay any other
    annual compensation not properly categorized as salary or bonus, including
    perquisites and other personal benefits, securities or property.
(3) During the period covered by the Table, the Company did not make any award
    of restricted stock, including share units.
(4)  The sum of the number of shares of Common Stock to be received upon the
     exercise of all stock options granted.
(5)  Except for stock option plans, the Company does not have in effect any
     plan that is intended to serve as incentive for performance to occur over
     a period longer than one fiscal year.
(6)  Represents the Company's matching contribution under the Company's 401(k)
     Plan for each named executive officer.
(7)  Mr. Barrett was elected as Chief Executive Officer on March 23, 1998.
(8)  Mr. Rady served as Chief Executive Officer from July 1, 1997 until March
     23, 1998 and as President from September 1994 until March 23, 1998, and
     he was an employee of the Company through April 30, 1998.
(9)  Mr. Reed was elected as President and Chief Operating Officer on March
     23, 1998.
 
                                      29
<PAGE>
 
Option Grants in Last Fiscal Year
 
  No stock appreciation rights were granted to any executive officers or
employees in the year ended December 31, 1998. The following table provides
information on stock option grants in the year ended December 31, 1998 to the
named executive officers.
 
                       Option Grants In Last Fiscal Year
 
<TABLE>
<CAPTION>
                                                                               Potential Realizable
                                                                                 Value at Assumed
                          Number of    % of Total                              Annual Rates of Stock
                         Securities     Options                                 Price appreciation
                         Underlying    Granted to  Exercise                       for Option Term
                           Options    Employees in   Price                     ---------------------
  Name                   Granted (#)  Fiscal Year  ($/Share)  Expiration Date      5%        10%
  ----                   -----------  ------------ --------- ----------------- ---------- ----------
<S>                      <C>          <C>          <C>       <C>               <C>        <C>
William J. Barrett......   100,000(1)     9.36%     $33.625  March 25, 2005    $   14,500 $1,314,500
                            10,000(2)     0.94%     $24.375  October 23, 2005  $   93,950 $  223,950
 
Paul M. Rady(3).........       -0-         -0-       -- --         -- --           -- --      -- --
 
A. Ralph Reed...........    50,000(4)     4.68%     $33.625  March 25, 2005    $    7,250 $  657,250
                            10,000(2)     0.94%     $24.375  October 23, 2005  $   93,950 $  223,950
 
J. Frank Keller.........    30,000(4)     2.81%     $33.625  March 25, 2005    $    4,350 $  394,350
                             5,000(2)     0.47%     $24.375  October 23, 2005  $   46,975 $  111,975
 
Peter A. Dea............    20,000(4)     1.87%     $33.625  March 25, 2005    $    2,900 $  262,900
                            15,000(5)     1.40%     $32.625  July 31, 2005     $   17,175 $  212,175
                             7,000(6)     0.66%     $24.375  October 23, 2005  $   65,765 $  156,765
                           100,000(7)     9.36%     $22.125  December 11, 2005 $1,164,500 $2,464,500
 
Bryan G. Hassler........    15,000(4)     1.40%     $33.625  March 25, 2005    $    2,175 $  197,175
                            10,000(5)     0.94%     $32.625  July 31, 2005     $   11,450 $  141,450
                             5,000(6)     0.47%     $24.375  October 23, 2005  $   46,975 $  111,975
</TABLE>
- --------
(1)  One-half of these option shares become exercisable on March 25, 1999, and
     the other half become exercisable on March 25, 2000.
(2)  These option shares were exercisable on the date of grant, October 23,
     1998.
(3)  Mr. Rady served as Chief Executive Officer from July 1, 1997 until March
     23, 1998 and as President from September 1994 until March 23, 1998.
(4)  One-fourth of these option shares become exercisable on each of March 25,
     1999; March 25, 2000 and March 25, 2002.
(5)  One-fourth of these option shares become exercisable on each of July 23,
     1999; July 23, 2000; July 23, 2001 and July 23, 2002.
(6)  One-fourth of these option shares become exercisable on each of July 31,
     1999; July 31, 2000; July 31, 2001 and July 31, 2002.
(7)  One-fourth of these option shares become first exercisable on each of
     December 11, 1999; December 11, 2000; December 11, 2001 and December 11,
     2002.
 
                                      30
<PAGE>
 
Aggregated Option Exercises And Fiscal Year-End Option Value Table
 
  The following table sets forth information concerning each exercise of stock
options during the fiscal year ended December 31, 1998 by the Company's Chief
Executive Officer and the four other most highly compensated executive
officers of the Company whose compensation exceeded $100,000 during the year
ended December 31, 1998 and the year-end value of unexercised options held by
these persons:
 
                          Aggregated Option Exercises
                    For Fiscal Year Ended December 31, 1998
                       And Year-End Option Values (/1/)
 
<TABLE>
<CAPTION>
                                                        Number of
                                                  Securities Underlying     Value of Unexercised
                                                   Unexercised Options      In-the-Money Options
                           Shares      Value    at Fiscal Year-End(#)(4)  at Fiscal Year-End($)(5)
                         Acquired on  Realized  ------------------------- -------------------------
   Name                  Exercise(2)   ($)(3)   Exercisable Unexercisable Exercisable Unexercisable
   ----                  ----------- ---------- ----------- ------------- ----------- -------------
<S>                      <C>         <C>        <C>         <C>           <C>         <C>
William J. Barrettt ....    19,524   $  225,746   188,000      100,000     $321,250          -0-
 Chief Executive
 Officer, and Chairman
 of the Board and a
 director
 
Paul M. Rady ...........   100,000   $1,844,375       -0-          -0-          -0-          -0-
 Former President,
 former Chief Executive
 Officer, and former
 director
 
A. Ralph Reed...........    56,648   $  626,346    58,400       70,000     $198,550     $ 17,500
 President, Chief
 Operating Officer and a
 director
 
J. Frank Keller.........       -0-          -0-    76,275       59,625     $505,225     $  8,400
 Executive Vice
 President, Chief
 Financial Officer, and
 a director
 
Peter A. Dea............    12,500   $  170,313    24,375      162,000     $100,000     $191,875
 Executive Vice
 President--Exploration
 
Bryan G. Hassler........     1,019   $   18,661    19,731       40,250     $ 44,504          -0-
 Vice President--
 Marketing
</TABLE>
- --------
(1)  No stock appreciation rights are held by any of the named executive
     officers.
(2)  The number of shares received upon exercise of options during the year
     ended December 31, 1998.
(3)  With respect to options exercised during the Company's year ended
     December 31, 1998, the dollar value of the difference between the option
     exercise price and the market value of the option shares purchased on the
     date of the exercise of the options.
(4)  The total number of unexercised options held as of December 31, 1998,
     separated between those options that were exercisable and those options
     that were not exercisable.
(5)  For all unexercised options held as of December 31, 1998, the aggregate
     dollar value of the excess of the market value of the stock underlying
     those options over the exercise price of those unexercised options. These
     values are shown separately for those options that were exercisable, and
     those options that were not yet exercisable, on December 31, 1998. As
     required, the price used to calculate these figures was the closing sale
     price of the Common Stock at year's end, which was $24.00 per share on
     December 31, 1998. On March 15, 1999, the closing sale price was $22.25
     per share.
 
Employee Retirement Plans, Long-Term Incentive Plans, and Pension Plans
 
  The Company has an employee retirement plan (the "401(k) Plan") that
qualifies under Section 401(k) of the Internal Revenue Code of 1986, as
amended. Employees of the Company are entitled to contribute to the 401(k)
Plan up to 15 percent of their respective salaries. The Company currently
contributes on behalf of each participating employee 100 percent of that
employee's contribution, up to a maximum of six percent of base salary, with
one-half of the matching contribution paid in cash and one-half paid in the
Company's Common Stock. The Company's matching contribution is subject to a
vesting schedule. Benefits payable to employees
 
                                      31
<PAGE>
 
upon retirement are based on the contributions made by the employee under the
401(k) Plan, the Company's matching contributions, and the performance of the
401(k) Plan's investments. Therefore, the Company cannot estimate the annual
benefits that will be payable to participants in the 401(k) Plan upon
retirement at normal retirement age. Excluding the 401(k) Plan, the Company
has no defined benefit or actuarial or pension plans or other retirement
plans.
 
  Excluding the Company's stock option plans, the Company has no long-term
incentive plan to serve as incentive for performance to occur over a period
longer than one fiscal year.
 
Compensation of Directors
 
  Standard Arrangements. Pursuant to the Company's standard arrangement for
compensating directors, no compensation for serving as a director is paid to
directors who also are employees of the Company, and those directors who are
not also employees of the Company ("Outside Directors") receive an annual
retainer of $20,000 paid in equal quarterly installments. In addition, for
each Board of Directors or committee meeting attended, each Outside Director
receives a $1,000 meeting attendance fee. Each Outside Director also receives
$300 for each telephone meeting lasting more than 15 minutes. The Chairman of
the Compensation and Audit Committees receives a $1,500 meeting attendance fee
for each committee meeting. For each Board of Directors or committee meeting
attended, each Outside Director will have options to purchase 1,000 shares of
Common Stock become exercisable. Although these options become exercisable
only at the rate of 1,000 for each meeting attended, each director will be
granted options to purchase 10,000 shares at the time the individual initially
becomes a director. Any options that have not become exercisable at the time
of termination of a director's service will expire at that time. At such time
that the options to purchase all 10,000 shares have become exercisable,
options to purchase an additional 10,000 shares will be granted to the
director and will be subject to the same restrictions on exercise as the
previously received options. The options are granted to the Outside Directors
pursuant to the Company's Non-Discretionary Stock Option Plan, and their
exercise price is equal to the closing sales price for the Company's Common
Stock on the date of grant. The options expire upon the later to occur of five
years after the date of grant and two years after the date those options first
became exercisable.
 
  Other Arrangements. During the year ended December 31, 1998, no compensation
was paid to directors of the Company other than pursuant to the standard
compensation arrangements described in the previous section.
 
Employment Contracts and Termination of Employment and Change-in-Control
Arrangements
 
  The Company has entered into severance agreements (the "Agreements") with
Messrs. Barrett, Reed, Keller, Dea and Hassler. Generally, the Agreements of
Messrs. Reed, Keller, Dea and Hassler provide, among other things, that if,
within three years after a Change-in-Control (as defined in the Agreement) the
employee's employment is terminated by the employee for "Good Reason" or by
the Company other than for "Cause" (as such terms are defined in the
Agreement), the employee will be entitled to a lump sum cash payment equal to
three times (two times in the case of Messrs. Dea and Hassler) the employee's
annual compensation (based on annual salary and past annual bonus) in addition
to continuation of certain benefits for three years (two years in the case of
Mr. Dea) from the date of termination. Mr. Barrett's Agreement, as amended,
provides that, if his employment is terminated by him for Good Reason or by
the Company other than for Cause prior to March 31, 2000, he will receive a
lump sum cash amount equal to the compensation that would have been paid from
his termination dated through March 31, 2000, in addition to continued
benefits through March 31, 2000.
 
  In addition, the Company's stock option plans and option agreements
thereunder provide for the acceleration of option exercisability in the event
of a change-in-control.
 
                                      32
<PAGE>
 
Compensation Committee Interlocks and Insider Participation
 
  During the year ended December 31, 1998, Messrs. Buford, Cody, Fitzgibbons,
Grant, Rodgers and Schreiber served as the members of the Compensation
Committee of the Board of Directors. Mr. Schreiber served as the President of
Excel Energy Corporation ("Excel") prior to the 1985 merger of Excel with and
into the Company. No other person who served as a member of the Compensation
Committee during the year ended December 31, 1998 was, during that year, an
officer or employee of the Company or of any of its subsidiaries, or was
formerly an officer of the Company or of any of its subsidiaries, except Mr.
Buford who served as Chairman of the Board from December 1983 through March
1994. However, Mr. Buford was never a salaried employee of the Company.
 
Item 12. Security Ownership of Certain Beneficial Owners and Management
 
  The following table summarizes certain information as of March 15, 1999 with
respect to the ownership by each director, by each executive officer named in
the "Executive Compensation" section above, by all executive officers and
directors as a group, and by each other person known by the Company to be the
beneficial owner of more than five percent of the common stock:
 
<TABLE>
<CAPTION>
             Name of                 Amount/Nature of        Percent of Class
         Beneficial Owner          Beneficial Ownership     Beneficially Owned
         ----------------          --------------------     ------------------
<S>                                <C>                      <C>
William J. Barrett................     582,741 Shares(1)            1.8%
C. Robert Buford..................     679,866 Shares(2)            2.1%
Derrill Cody......................      23,560 Shares(3)              *
Peter A. Dea......................      74,463 Shares(3)              *
James M. Fitzgibbons..............      22,500 Shares(3)              *
William W. Grant, III.............      35,150 Shares(3)              *
Bryan G. Hassler..................      31,665 Shares(3)              *
J. Frank Keller...................     133,707 Shares(3)              *
A. Ralph Reed.....................     128,834 Shares(3)              *
James T. Rodgers..................      23,500 Shares(3)              *
Philippe S.E. Schreiber...........      27,007 Shares(3)
 
All Directors and Executive
 Officers as a Group (16
 Persons).........................   1,978,758 Shares(5)            6.0%
 
Franklin Resources, Inc...........   4,337,676 Shares(6)           13.5%
 777 Mariners Island
 San Mateo, CA 94403
 
State Farm Mutual Automobile
 Insurance Company and
 affiliates.......................   2,935,633 Shares(6)(7)         9.2%
 One State Farm Plaza
 Bloomington, IL 61710
 
Lazard Freres & Co. LLC...........   1,601,236 Shares(6)            5.0%
 30 Rockefeller Plaza
 New York, NY 10020
</TABLE>
- --------
 *  Less than 1% of the Common Stock outstanding.
(1) The number of shares indicated includes 21,292 shares owned by Mr.
    Barrett's wife, 230,000 shares owned by the Barrett Family L.L.L.P., a
    Colorado limited liability limited partnership for which Mr. Barrett and
    his wife are general partners and owners of an aggregate of 48.626622
    percent of the partnership interests, and 238,000 shares underlying
    options that currently are exercisable or become exercisable within 60
    days following March 15, 1999. Pursuant to Rule 16a-1(a)(4) under the
    Exchange Act, Mr. Barrett disclaims ownership of all but 111,841 shares
    held by the Barrett Family L.L.L.P., which constitutes Mr. and Mrs.
    Barrett's proportionate share of the shares held by the Barrett Family
    L.L.L.P.
(2) C. Robert Buford is considered a beneficial owner of the 598,210 shares of
    which Zenith is the record owner. Mr. Buford owns approximately 89 percent
    of the outstanding common stock of Zenith. The number of shares of the
    Company's stock indicated for Mr. Buford also includes 10,000 shares that
    are owned by Aguilla Corporation, which is owned by Mr. Buford's wife and
    adult children. Mr. Buford disclaims beneficial ownership of the shares
    held by Aguilla Corporation pursuant to Rule 16a-1(a)(4) under the
 
                                      33
<PAGE>
 
    Exchange Act. The number of shares indicated also includes 12,500 shares
    underlying stock options that currently are exercisable or that become
    exercisable within 60 days following March 15, 1999.
(3) The number of shares indicated consists of or includes the following
    number of shares underlying options that currently are exercisable or that
    become exercisable within 60 days following March 15, 1999 that are held
    by each of the following persons: Derrill Cody, 23,300; Peter A. Dea,
    65,000; James M. Fitzgibbons, 10,500; William W. Grant, III, 22,800; Bryan
    G. Hassler, 30,250; J. Frank Keller, 91,500; James T. Rodgers, 13,500 and
    Philippe S.E. Schreiber, 20,000.
(4) The number of shares indicated includes 7,800 shares owned by Mary C.
    Reed, Mr. Reed's wife, and 80,900 shares underlying options that currently
    are exercisable or that become exercisable within 60 days following March
    15, 1999.
(5) The number of shares indicated includes the shares owned by Zenith that
    are beneficially owned by Mr. Buford as described in note (2) and the
    aggregate of 608,250 shares underlying the options described in notes (1),
    (2), (3) and (4), an aggregate of 33,264 shares owned by five executive
    officers not named in the above table, and an aggregate of 182,501 shares
    underlying options that currently are exercisable or that are exercisable
    within 60 days following March 15, 1999 that are held by those five
    executive officers.
(6) Based on information included in a Schedule 13G filed with the Securities
    and Exchange Commission by the named stockholders.
(7) The number of shares indicated includes the shares owned by entities
    affiliated with State Farm Mutual Automobile Insurance Company ("SFMAI").
    Those entities and SFMAI may be deemed to constitute a "group" with regard
    to the ownership of shares reported on a Schedule 13G.
 
Item 13. Certain Relationships and Related Transactions
 
  During 1998, there were no transactions between the Company and its
directors, executive officers or known holders of greater than five percent of
the Company's Common Stock in which the amount involved exceeded $60,000 and
in which any of the foregoing persons had or will have a material interest.
 
                                      34
<PAGE>
 
                                    PART IV
 
Item 14. Exhibits, Financial Schedules, and Reports on Form 8-K
 
  (a)(1) and (a)(2) Financial Statements And Financial Statement Schedules
 
        INDEX TO FINANCIAL STATEMENTS AND FINANCIAL STATEMENT SCHEDULES
 
<TABLE>
   <S>                                                                    <C>
   Report of Independent Public Accountants..............................  F-1
   Consolidated Balance Sheets at December 31, 1998 and 1997.............  F-2
   Consolidated Statements of Income for each of the three years in the
    period ended December 31, 1998.......................................  F-3
   Consolidated Statements of Stockholders' Equity for each of the three
    years in the period ended December 31, 1998..........................  F-4
   Consolidated Statements of Cash Flows for each of the three years in
    the period ended December 31, 1998...................................  F-5
   Notes to the Consolidated Financial Statements........................  F-6
   Supplemental Oil And Gas Information.................................. F-21
</TABLE>
 
  All other schedules are omitted because the required information is not
present in amounts sufficient to require submission of the schedule or because
the information required is included in the Consolidated Financial Statements
and Notes thereto.
 
  (a)(3) Exhibits
 
  See"EXHIBIT INDEX" on page 36.
 
  (b) Reports on Form 8-K. No Current Reports on Form 8-K were filed during
the fourth quarter of the year ended December 31, 1998.
 
                                      35
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                           ANNUAL REPORT ON FORM 10-K
 
                      For The Year Ended December 31, 1998
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
 Exhibit                               Description
 -------                               -----------
 <C>     <S>
  2.1    Agreement And Plan of Merger, dated as of May 2, 1995, among Barrett
         Resources Corporation ("Barrett" or "Registrant"), Barrett Energy Inc.
         (formerly known as Vanilla Corporation), and Plains Petroleum Company
         ("Plains") is incorporated by reference from Annex I to the Joint
         Proxy Statement/Prospectus of Barrett and Plains dated June 13, 1995.
 
  3.1    Restated Certificate Of Incorporation of Barrett Resources
         Corporation, a Delaware corporation, is incorporated herein by
         reference from Exhibit 3.2 of Registrant's Registration Statement on
         Form S-4 dated June 9, 1995.
 
  3.2    Certificate of Amendment to Certificate of Incorporation of Barrett
         dated June 17, 1997 is incorporated by reference from Exhibit 3.2 of
         Registrant's Annual Report on Form 10-K for the year ended December
         31, 1997.
 
  3.3    Bylaws of Barrett, as amended through February 25, 1999.
 
  4.1A   Form of Rights Agreement dated as of August 5, 1997 between Barrett
         and BankBoston, N.A., which includes, as Exhibit A thereto, the form
         of Certificate of Designations specifying the terms of the Series A
         Junior Participating Preferred Stock, and as Exhibit B thereto, the
         form of Rights Certificate, is incorporated by reference from Exhibit
         1 to the Company's Registration Statement on Form 8-A filed August 11,
         1997.
 
  4.1B   Amendment to Rights Agreement dated August 5, 1997 between Barrett and
         BankBoston, N.A.
 
  4.2    Revised Form of Indenture between the Company and Bankers Trust
         Company, as trustee, with respect to Senior Notes including specimen
         of 7.55% Senior Notes is incorporated by reference from Exhibit 4.1 to
         the Company's Amendment No. 1 to Registration Statement on Form S-3
         filed February 10, 1997, File No. 333-19363.
 
  4.3    Form of Indenture between the Registrant and Bankers Trust Company, as
         trustee, with respect to Debt Securities is incorporated by reference
         from Exhibit 4.2 of Registrant's Registration Statement on Form S-3
         filed May 6, 1998 (File No. 333-51985).
 
 10.1    Non-Qualified Stock Option Plan Of Barrett Resources Corporation is
         incorporated by reference from Registrant's Registration Statement on
         Form S-8 dated November 15, 1989.
 
 10.2    Registrant's 1990 Stock Option Plan, as amended, is incorporated by
         reference from the Registrant's Registration Statement on Form S-8
         dated March 15, 1995.
 
 10.3    Registrant's Non-Discretionary Stock Option, as amended, is
         incorporated by reference from Exhibit 99.2 of the Registrant's Proxy
         Statement dated April 24, 1997.
 
 10.4    Registrant's 1994 Stock Option Plan, as amended, is incorporated by
         reference from the Registrant's Registration Statement on Form S-8
         dated March 15, 1995.
 
 10.5    Registrant's 1997 Stock Option Plan is incorporated by reference from
         Exhibit 99.1 of the Registrant's Proxy Statement dated April 24, 1997.
 
 10.6A   Gas Purchase Contract, No. P-1090, dated April 20, 1984, as amended,
         between Plains and KN Energy, Inc. is incorporated by reference from
         Plains Petroleum Company's Registration Statement on Form 10 dated
         August 21, 1985.
 
</TABLE>
 
 
                                       36
<PAGE>
 
<TABLE>
<CAPTION>
 Exhibit                               Description
 -------                               -----------
 <C>     <S>
 10.6B   Letter Agreement dated January 11, 1996, amending the Gas Purchase
         Contract, No. P-1090, dated April 20, 1984, between Plains and KN
         Energy, Inc. is incorporated by reference from Exhibit 10.5B of the
         Registrant's Annual Report on Form 10-K for the year ended December
         31, 1996.

 10.7A   Revolving Credit Agreement dated as of July 19, 1995 among Barrett and
         Texas Commerce Bank National Association, as Agent, and Texas Commerce
         Bank National Association, Nations Bank of Texas, N.A., Bank of
         Montreal, Houston Agency, Colorado National Bank, and The First
         National Bank of Boston, as the "Banks", is incorporated by reference
         from Exhibit 10.6 to Barrett's Annual Report on Form 10-K for the year
         ended December 31, 1995.
 
 10.7B   First Amendment to Revolving Credit Agreement dated October 31, 1996
         between and among Barrett, Agent and the Banks is incorporated by
         reference from Exhibit 10.1 to Amendment No. 2 to Barrett's
         Registration Statement on Form S-3 (File No. 333-19363) dated February
         10, 1997.
 
 10.7C   Second Amendment to Revolving Credit Agreement dated February 10, 1997
         between and among Barrett, the Agent, and the Banks is incorporated by
         reference from Exhibit 10.2 to Amendment No. 2 to Barrett's
         Registration Statement on Form S-3 (File No. 333-19363) dated February
         10, 1997.
 
 10.7D   Amended and Restated Credit Agreement dated November 12, 1997 between
         and among Barrett, the Agent, the Banks, and The Chase Manhattan Bank
         as the "Competitive Bid Auction Agent" is incorporated by reference
         from Exhibit 10.7D to Registrant's Annual Report on Form 10-K for the
         year ended December 31, 1997.
 
 10.7E   First Amendment to Amended and Restated Credit Agreement dated
         December 19, 1997 between and among Barrett, the Agent, the Banks, and
         the Competitive Bid Auction Agent is incorporated by reference from
         Exhibit 10.7E to Registrant's Annual Report on Form 10-K for the year
         ended December 31, 1997.
 
 10.8A   Severance Protection Agreement dated February 6, 1998 between
         Registrant and William J. Barrett is incorporated by reference from
         Exhibit 10.8 to Registrant's Annual Report on Form 10-K for the year
         ended December 31, 1997.
 
 10.8B   Amendment No. 1 to Severance Protection Agreement dated November 19,
         1998 between Registrant and William J. Barrett.
 
 10.9A   Form of Severance Protection Agreement between Barrett and each of A.
         Ralph Reed, J. Frank Keller, Peter A. Dea and Bryan G. Hassler is
         incorporated by reference from Exhibit 10.9A to Registrant's Annual
         Report on Form 10-K for the year ended December 31, 1997.

 10.9B   Schedule Identifying Material Differences Among Severance Protection
         Agreements between Barrett and each of A. Ralph Reed, J. Frank Keller,
         Peter A. Dea, and Bryan G. Hassler.
 
 21      List of Subsidiaries.
 
 23.1    Consent of Arthur Andersen LLP.
 
 23.2    Consent of Ryder Scott Company.
 
 23.3    Consent of Netherland, Sewell & Associates, Inc.
 
 27      Financial Data Schedule.
</TABLE>
 
                                       37
<PAGE>
 
                   REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To Barrett Resources Corporation
 
  We have audited the accompanying consolidated balance sheets of Barrett
Resources Corporation (a Delaware corporation) and subsidiaries as of December
31, 1998 and 1997, and the related consolidated statements of income,
stockholders' equity and cash flows for each of the three years in the period
ended December 31, 1998. These financial statements are the responsibility of
the Company's management. Our responsibility is to express an opinion on these
financial statements based on our audits.
 
  We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.
 
  In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Barrett Resources
Corporation and subsidiaries as of December 31, 1998 and 1997, and the results
of their operations and their cash flows for each of the three years in the
period ended December 31, 1998, in conformity with generally accepted
accounting principles.
 
                                          Arthur Andersen LLP
 
Denver, Colorado
February 26, 1999
 
                                      F-1
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                          CONSOLIDATED BALANCE SHEETS
 
                           December 31, 1998 and 1997
                                 (in thousands)
 
<TABLE>
<CAPTION>
                                                                1998     1997
                                                              -------- --------
<S>                                                           <C>      <C>
                           ASSETS
Current assets:
  Cash and cash equivalents.................................. $ 14,339 $ 14,479
  Receivables, net...........................................  127,798  102,934
  Inventory..................................................    8,968    2,579
  Other current assets.......................................    2,053    1,701
                                                              -------- --------
    Total current assets.....................................  153,158  121,693
Net property and equipment (full cost method)................  682,168  747,175
Other assets, net............................................    3,553    3,833
                                                              -------- --------
                                                              $838,879 $872,701
                                                              ======== ========
            LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable........................................... $104,799 $ 61,870
  Amounts payable to oil and gas property owners.............   16,020   27,174
  Production taxes payable...................................   20,400   17,945
  Accrued and other liabilities..............................   17,047   17,917
                                                              -------- --------
    Total current liabilities................................  158,266  124,906
Long term debt...............................................  334,067  266,437
Deferred income taxes........................................   13,294   68,977
Commitments and contingencies--Note 10
Stockholders' equity:
  Preferred stock, $.001 par value: 1,000,000 shares
   authorized, none outstanding..............................      --       --
  Common stock, $.01 par value: 45,000,000 shares authorized,
   32,002,304 outstanding (31,415,528 at December 31, 1997)..      320      314
  Additional paid-in capital.................................  261,998  247,390
  Retained earnings..........................................   70,934  164,677
                                                              -------- --------
    Total stockholders' equity...............................  333,252  412,381
                                                              -------- --------
                                                              $838,879 $872,701
                                                              ======== ========
</TABLE>
 
                            See accompanying notes.
 
                                      F-2
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                       CONSOLIDATED STATEMENTS OF INCOME
 
                  Years ended December 31, 1998, 1997 and 1996
                     (in thousands, except per share data)
 
<TABLE>
<CAPTION>
                                                     1998       1997     1996
                                                   ---------  -------- --------
<S>                                                <C>        <C>      <C>
Revenues:
  Oil and gas production.......................... $ 205,501  $206,907 $151,737
  Trading revenues................................   412,982   171,140   46,862
  Interest income.................................       649     1,573      760
  Other income....................................     6,267     2,980    3,213
                                                   ---------  -------- --------
                                                     625,399   382,600  202,572
Operating expenses:
  Lease operating expenses........................    58,626    57,904   47,642
  Depreciation, depletion and amortization........   102,123    72,389   45,775
  Impairment......................................   168,304       --       --
  Cost of trading.................................   398,041   165,218   44,036
  General and administrative......................    24,546    24,890   16,947
  Interest expense................................    20,858    13,243    3,684
  Other expenses, net.............................     2,412     1,770      --
                                                   ---------  -------- --------
                                                     774,910   335,414  158,084
                                                   ---------  -------- --------
(Loss) income before income taxes.................  (149,511)   47,186   44,488
(Benefit) provision for income taxes..............   (55,768)   17,925   14,962
                                                   ---------  -------- --------
Net (loss) income................................. $ (93,743) $ 29,261 $ 29,526
                                                   =========  ======== ========
(Loss) earnings per common share
  Basic........................................... $   (2.95) $    .93 $   1.04
  Assuming dilution............................... $   (2.95) $    .92 $   1.02
</TABLE>
 
 
                            See accompanying notes.
 
                                      F-3
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
 
                  Years ended December 31, 1998, 1997 and 1996
                                 (in thousands)
 
<TABLE>
<CAPTION>
                                     Additional                        Total
                              Common  Paid-In   Treasury Retained  Stockholders'
                              Stock   Capital    Stock   Earnings     Equity
                              ------ ---------- -------- --------  -------------
<S>                           <C>    <C>        <C>      <C>       <C>
Balance, January 1, 1996....   $251   $ 86,154   $ (467) $105,890    $191,828
  Exercise of stock
   options..................      2      4,077     (527)      --        3,552
  Purchase of treasury
   stock....................    --         --      (351)      --         (351)
  Retirement of treasury
   stock....................    --      (1,345)   1,345       --          --
  Stock issued in connection
   with
   property acquisitions....      6     18,362      --        --       18,368
  Issuance of common stock,
   net......................     54    134,743      --        --      134,797
  Net income for the year
   ended December 31, 1996..    --         --       --     29,526      29,526
                               ----   --------   ------  --------    --------
Balance, December 31, 1996..    313    241,991      --    135,416     377,720
  Exercise of stock
   options..................      1      1,389     (207)      --        1,183
  Purchase of treasury
   stock....................    --         --        (2)      --           (2)
  Retirement of treasury
   stock....................    --        (209)     209       --          --
  Fair value of put option
   issued in connection with
   property acquisitions....    --       4,219      --        --        4,219
  Net income for the year
   ended December 31, 1997..    --         --       --     29,261      29,261
                               ----   --------   ------  --------    --------
Balance, December 31, 1997..    314    247,390      --    164,677     412,381
  Exercise of stock
   options..................      3      5,728     (233)      --        5,498
  Retirement of treasury
   stock....................    --        (233)     233       --          --
  Stock issued in connection
   with
   property acquisitions....      3      9,113      --        --        9,116
  Net loss for the year
   ended December 31, 1998..    --         --       --    (93,743)    (93,743)
                               ----   --------   ------  --------    --------
Balance, December 31, 1998..   $320   $261,998   $  --   $ 70,934    $333,252
                               ====   ========   ======  ========    ========
</TABLE>
 
                            See accompanying notes.
 
                                      F-4
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
                  Years ended December 31, 1998, 1997 and 1996
                                 (in thousands)
 
<TABLE>
<CAPTION>
                                                 1998       1997       1996
                                               ---------  ---------  ---------
<S>                                            <C>        <C>        <C>
Cash flows from operations:
  Net (loss) income........................... $ (93,743) $  29,261  $  29,526
  Adjustments needed to reconcile to net cash
   flow provided by operations:
    Depreciation, depletion and amortization
     and impairment...........................   270,858     72,743     45,775
    Unrealized (gain) on trading..............       --         --      (1,139)
    Deferred income taxes.....................   (55,683)    18,069     13,655
    Other.....................................    (2,168)       --         --
                                               ---------  ---------  ---------
                                                 119,264    120,073     87,817
Change in current assets and liabilities:
  Receivables.................................   (24,864)   (29,889)   (41,956)
  Other current assets........................    (6,383)    (1,697)      (582)
  Accounts payable............................    42,929     20,253     27,248
  Amounts due oil and gas owners..............   (11,154)     8,678      9,622
  Production taxes payable....................     2,455      4,115      5,783
  Accrued and other liabilities...............    (5,277)    12,749        742
                                               ---------  ---------  ---------
Net cash flow provided by operations..........   116,970    134,282     88,674
                                               ---------  ---------  ---------
Cash flows from investing activities:
  Proceeds from sales of oil and gas
   properties.................................     6,393     14,233      1,948
  Acquisitions of property and equipment......  (203,056)  (340,015)  (202,610)
                                               ---------  ---------  ---------
Net cash flow used in investing activities....  (196,663)  (325,782)  (200,662)
                                               ---------  ---------  ---------
Cash flows from financing activities:
  Proceeds from issuance of common stock,
   net........................................     5,498      1,183    138,349
  Purchase of treasury stock..................       --          (2)      (351)
  Proceeds from long-term borrowing...........   119,000    130,577     91,000
  Payments on long-term debt..................   (44,794)   (86,131)  (110,000)
  Proceeds from Senior Notes, net of offering
   costs......................................       --     145,963        --
  Other.......................................      (151)      (150)       --
                                               ---------  ---------  ---------
Net cash flow provided by financing
 activities...................................    79,553    191,440    118,998
                                               ---------  ---------  ---------
Increase (decrease) in cash and cash
 equivalents..................................      (140)       (60)     7,010
Cash and cash equivalents at beginning of
 year.........................................    14,479     14,539      7,529
                                               ---------  ---------  ---------
Cash and cash equivalents at end of year...... $  14,339  $  14,479  $  14,539
                                               =========  =========  =========
</TABLE>
 
                            See accompanying notes.
 
                                      F-5
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                       December 31, 1998, 1997 and 1996
 
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
 Business
 
  Barrett Resources Corporation (the "Company") is an independent natural gas
and oil exploration and production company with producing properties located
principally in the Rocky Mountain region, Mid-Continent states and the Gulf of
Mexico. The Company also operates gas gathering systems and related facilities
in certain areas in which the Company owns production. In addition, the
Company engages in natural gas trading activities, which involve purchasing
natural gas from third parties and selling natural gas to other parties. In
1996, the Company commenced international activities with an exploration
project in the Republic of Peru.
 
 Principles of consolidation
 
  The consolidated financial statements include the accounts of the Company
and its subsidiaries, all of which are wholly owned, except Barrett Piceance,
LLC in which the Company owns 99 percent of the equity. All significant
intercompany transactions have been eliminated in consolidation.
 
 Reclassifications
 
  Certain reclassifications have been made to 1997 and 1996 amounts to conform
to the 1998 presentation.
 
 Use of estimates
 
  The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities at the
date of the financial statements and the reported amounts of revenues and
expenses during the reporting period. Actual results could differ from those
estimates. There are many factors, including global events, that may influence
the production, processing, marketing, and valuation of crude oil and natural
gas. A reduction in the valuation of oil and gas properties resulting from
declining prices or production could adversely impact depletion rates and
ceiling test limitations.
 
 Partnerships
 
  The consolidated financial statements include the Company's proportionate
share of the assets, liabilities, revenues and expenses of its oil and gas
partnership interests.
 
 Cash and cash equivalents
 
  Cash in excess of daily requirements is invested in money market accounts
and commercial paper with maturities of three months or less. Such investments
are deemed to be cash equivalents for purposes of the consolidated statements
of cash flows. The carrying amount of cash equivalents approximates fair value
because of the short maturity of those instruments.
 
 Oil and gas properties
 
  The Company utilizes the full cost method of accounting for oil and gas
properties whereby all productive and nonproductive costs paid to third
parties that are incurred in connection with the acquisition, exploration and
development of oil and gas reserves are capitalized. No gains or losses are
recognized upon the sale, conveyance or other disposition of oil and gas
properties except in extraordinary transactions involving the transfer of
significant amounts of oil and gas reserves.
 
  Capitalized costs are accumulated on a country-by-country basis subject to a
cost center ceiling and amortized using the units-of-production method. The
Company presently has two cost centers: the United States and Peru.
Amortizable costs include developmental drilling in progress as well as
estimates of future
 
                                      F-6
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
development costs of proved reserves, but exclude the costs of unevaluated oil
and gas properties. Oil and gas properties accounted for using the full cost
method of accounting, a method utilized by the Company, are excluded from the
long-lived asset impairment test requirement of Financial Accounting Standards
No. 121, but will continue to be subject to the ceiling test limitations.
Accumulated depreciation is written off as assets are retired. Depletion and
amortization equaled approximately $.92, $.77 and $.59 per Mcfe ($5.49, $4.60
and $3.54 per BOE) during the years ended December 31, 1998, 1997 and 1996,
respectively. A full cost method of accounting ceiling test in 1998 resulted
in the Company recognizing a pre-tax impairment expense of $129 million and
$39 million on its oil and gas properties located in the United States and
Peru, respectively.
 
  The Company leases non-producing acreage for its exploration and development
activities. The cost of these leases is included in unevaluated oil and gas
property costs recorded at the lower of cost or fair market value.
 
  The Company operates many of the wells in which it owns an economic
interest. The operating agreements for these activities provide for a fee
structure to allow the Company to recover a portion of its direct and overhead
charges related to its operating activities. The fees collected under the
operating agreements are recorded as a reduction of general and administrative
expenses. Any amounts collected from a sale of oil and gas interests or earned
as a result of assembling oil and gas drilling activities are applied to
reduce the book value of oil and gas properties.
 
 Other property and equipment
 
  Other property and equipment is recorded at cost. Renewals and betterments
which substantially extend the useful life of the assets are capitalized.
Maintenance and repairs are expensed when incurred. Depreciation is provided
using accelerated and straight-line methods over the estimated useful lives,
ranging from five to ten years, of the assets.
 
 Amounts payable to oil and gas property owners
 
  Amounts payable to oil and gas property owners consist of cash calls from
working interest owners to pay for development costs of properties being
currently developed and production revenue that the Company, as operator, is
collecting and distributing to revenue interest owners.
 
 Trading and hedging activities
 
  The Company's business activities include the buying and selling of natural
gas. The Company currently recognizes revenue and costs on gas trading
transactions at the point in time when gas is delivered to the purchaser.
 
  The Company uses both commodity futures contracts and price swaps to hedge
the impact of price fluctuations on a portion of its production and trading
activities. The Company enters into a hedging position for specific
transactions that management deems expose the Company to an unacceptable
market price risk. Price swaps or commodities transactions without
corresponding scheduled physical transactions (scheduled physical transactions
include committed trading activities or production from producing wells) do
not qualify for hedge accounting. The Company classifies these positions as
trading positions and records these instruments at fair value. As of December
31, 1998 the Company did not have any positions that did not qualify for hedge
accounting. Gains and losses are recognized as fair values fluctuate from time
to time compared to cost.
 
  Gains or losses on hedging transactions are deferred until the physical
transaction occurs for financial reporting purposes. Deferred gains and losses
and unrealized gains and losses are evaluated in connection with the physical
transaction underlying the hedge position. Hedging gains or losses
significantly exceeding the price movement of the underlying physical
transaction are recorded in the consolidated statements of income in the
period in which the lack of correlation occurred. Gains or losses on hedging
activities are recorded in the
 
                                      F-7
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
consolidated statements of income as adjustments of the revenue or cost of the
underlying physical transaction. Hedging transactions are reported as
operating activities in the consolidated statements of cash flows.
 
 Earnings per share
 
  In 1997, the Company adopted Statement of Financial Accounting Standards No.
128, "Earnings Per Share" (SFAS No. 128) effective December 15, 1997. This
pronouncement requires the presentation of the earnings per share ("EPS")
based on the weighted-average number of common shares outstanding (referred to
as basic earnings per share) and earnings per share giving effect to all
dilutive potential common shares that were outstanding during the reporting
period (referred to as diluted earnings per share or earnings per share-
assuming dilution). In addition, this pronouncement requires restatement of
earnings per share for all prior periods presented. As a result, the Company's
reported earnings per share for 1996 were restated.
 
  The following data show the amounts used in computing earnings per share and
the effect on income and the weighted average number of shares of dilutive
potential common stock.
 
<TABLE>
<CAPTION>
                                                        For the Years Ended
                                                            December 31,
                                                      -------------------------
                                                        1998     1997    1996
                                                      --------  ------- -------
                                                           (in thousands)
   <S>                                                <C>       <C>     <C>
   Income (loss) available to common stockholders.... $(93,743) $29,261 $29,526
                                                      ========  ======= =======
   Weighted average number of common shares used in
    basic EPS........................................   31,756   31,367  28,388
   Effect of dilutive securities (see Note 7):
     Stock options...................................      --       466     432
     Written put option..............................      --       107     --
                                                      --------  ------- -------
   Weighted number of common shares and dilutive
    potential common stock used in EPS--assuming
    dilution.........................................   31,756   31,940  28,820
                                                      ========  ======= =======
</TABLE>
 
  Dilutive securities were not included in computing diluted EPS for 1998
because their effects were antidilutive.
 
 Recently Issued Accounting Standards
 
  In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 133 ("SFAS No. 133"), "Accounting for
Derivative Instruments and Hedging Activities". SFAS No. 133 establishes
accounting and reporting standards requiring that every derivative instrument
(including certain derivative instruments embedded in other contracts) be
recorded in the balance sheet as either an asset or liability measured at its
fair value. It also requires that changes in the derivative's fair value be
recognized currently in earnings unless specific hedge accounting criteria are
met. Special accounting for qualifying hedges allows a derivative's gains and
losses to offset related results on the hedged item in the income statement,
and requires that a company must formally document, designate, and assess the
effectiveness of transactions that receive hedge accounting. SFAS No. 133 is
effective for fiscal years beginning after June 15, 1999 and cannot be applied
retroactively. The Company has not yet quantified the impacts of adopting SFAS
No. 133 on its financial statements and has not determined the timing of or
method of adoption of SFAS No. 133. However, SFAS No. 133 could increase
volatility in earnings and other comprehensive income.
 
  In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130 ("SFAS No. 130"), "Reporting
Comprehensive Income". SFAS No. 130 requires the reporting of comprehensive
income (non-owner changes in equity) and its components in the financial
statements. In 1998, the Company did not have any equity changes from non-
owner sources that would be classified as comprehensive income.
 
                                      F-8
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
2. RECEIVABLES
 
<TABLE>
<CAPTION>
                                                                1998     1997
                                                              -------- --------
                                                               (in thousands)
   <S>                                                        <C>      <C>
   Oil and gas revenue and trading receivables............... $108,969 $ 78,962
   Joint interest billings...................................   16,074   22,672
   Other accounts receivable.................................    2,755    1,300
                                                              -------- --------
                                                              $127,798 $102,934
                                                              ======== ========
</TABLE>
 
  The Company's accounts receivable are primarily due from medium size oil and
gas entities in the Rocky Mountain and Gulf Coast regions and from industrial
end-users and local distribution companies. Collection of joint interest
billings is generally secured by future production. The Company performs
periodic credit evaluations of customers purchasing production and purchased
natural gas for which no collateral is required. Based upon these evaluations,
the Company may require a standby letter of credit or a financial guarantee.
Historically, the Company has not experienced significant losses related to
these extensions of credit. As of December 31, 1998 and 1997, receivables are
recorded net of allowance for doubtful accounts of $658,000 and $694,000,
respectively.
 
3. INVENTORY
 
  Materials and supplies, and natural gas inventory are stated at the lower of
average cost or market. Natural gas, when sold from inventory, is charged to
expense using the average-cost method.
 
<TABLE>
<CAPTION>
                                                                  1998    1997
                                                                 ------- -------
                                                                 (in thousands)
   <S>                                                           <C>     <C>
   Natural Gas.................................................. $ 7,195 $ 1,164
   Material and Supplies........................................   1,773   1,415
                                                                 ------- -------
                                                                 $ 8,968 $ 2,579
                                                                 ======= =======
</TABLE>
 
4. PROPERTY AND EQUIPMENT
 
<TABLE>
<CAPTION>
                                                            1998       1997
                                                         ---------- ----------
                                                            (in thousands)
   <S>                                                   <C>        <C>
   Oil and gas properties, full cost method:
     Unevaluated costs, not being amortized............. $   57,914 $  119,737
     Evaluated costs....................................  1,109,822    848,334
     Gas gathering systems..............................     38,799     35,551
   Furniture, vehicles and equipment....................     11,120     10,181
                                                         ---------- ----------
                                                          1,217,655  1,013,803
   Less accumulated depreciation, depletion,
    amortization and impairment.........................    535,487    266,628
                                                         ---------- ----------
                                                         $  682,168 $  747,175
                                                         ========== ==========
</TABLE>
 
                                      F-9
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
5. UNEVALUATED OIL AND GAS PROPERTY COSTS
 
  Unevaluated oil and gas property costs associated with unevaluated
properties and major development projects consist of the following:
 
<TABLE>
<CAPTION>
                                                   Costs incurred during
                                            ------------------------------------
                                             1998    1997    1996  Prior  Total
                                            ------- ------- ------ ----- -------
                                                       (in thousands)
   <S>                                      <C>     <C>     <C>    <C>   <C>
   Acquisition costs....................... $19,847 $25,225 $4,188 $ 85  $49,345
   Exploration costs.......................   6,309   1,497    763  --     8,569
                                            ------- ------- ------ ----  -------
                                            $26,156 $26,722 $4,951 $ 85  $57,914
                                            ======= ======= ====== ====  =======
</TABLE>
 
  The unevaluated costs were incurred for projects which are being explored.
The Company anticipates that substantially all unevaluated costs will be
classified as evaluated costs within the next five years.
 
6. LONG-TERM DEBT
 
<TABLE>
<CAPTION>
                                                                 1998     1997
                                                               -------- --------
                                                                (in thousands)
   <S>                                                         <C>      <C>
   Line of Credit............................................. $175,000 $100,000
   7.55% Senior Notes.........................................  150,000  150,000
   Production Payments........................................   14,399   17,231
                                                               -------- --------
   Total......................................................  339,399  267,231
   Less: current portion......................................    5,332      794
                                                               -------- --------
   Long-term debt............................................. $334,067 $266,437
                                                               ======== ========
</TABLE>
 
 Line of Credit
 
  The Company has a reserve-based line of credit with a group of banks which
provides up to $250 million, maturing September 30, 2002. The amount actually
available to the Company under the line at any given time is limited to the
collateral value of proved reserves as determined by the lenders. Based on the
lenders' determination of collateral value, as of December 31, 1998 (which was
based on an unaudited June 30, 1998 reserve report), the Company's borrowing
limit was $200 million. The lenders are currently reviewing the December 31,
1998 reserve report to determine current collateral value. At the conclusion
of this review, the borrowing base could change. The Company is required to
pay only interest during the revolving period. At its option, the Company has
elected to use the London Interbank Eurodollar Rate (LIBOR) plus a spread
ranging from .185 percent to .625 percent (depending on the Company's Senior
Debt Rating and the ratio of the Company's outstanding indebtness to its
earnings before interest, taxes and depreciation, depletion and amortization)
for a substantial portion of the outstanding balance. As of December 31, 1998
the Company's outstanding balance under the line of credit was $175 million
which was accruing interest at an average LIBOR based rate of 5.625 percent.
The line of credit agreement provides for facility fees ranging between 9/100
of one percent and 37.5/100 of one percent of the lesser of the available
commitment and the borrowing base. The Credit Agreement restricts the payment
of dividends, borrowings, sale of assets, loans to others, and investment and
merger activity over certain limits without the prior consent of the bank and
requires the Company to maintain certain net worth and debt to equity levels.
 
 7.55% Senior Notes
 
  In February 1997, the Company completed a public offering of $150 million
(principal amount) of its 7.55% Senior Notes due 2007 ("Notes"). A portion of
the net proceeds from the offering was used to repay the
 
                                     F-10
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
Company's existing line of credit. The Notes are senior unsecured obligations
of the Company ranking equally in right of payment to all existing and future
senior indebtedness of the Company. At the option of the Company, the Notes
may be redeemed at any time, in whole or in part, by paying an amount
specified for a make-whole premium. The indenture of the Notes limits the
Company's ability to incur indebtedness secured by certain liens, engage in
certain sale/leaseback transactions, and engage in certain merger,
consolidation or reorganization transactions. Interest is paid semi-annually
on February 1 and August 1 of each year.
 
 Production Payments
 
  In January 1997, the Company assumed a production payment in an acquisition
of properties with a term of three years. Payments of the production payment
liability is funded from production from the properties.
 
  In November 1997, the Company sold its interest in certain Colorado
properties to an investment group which includes a Company subsidiary. For
accounting purposes, the Company has treated the sale as a non-recourse
monetary production payment reflected in long-term liabilities on the balance
sheet. Net of transaction costs, the proceeds from the sale were approximately
$15.5 million in cash. Payments of the production payment liability are funded
from the operating cash flow of the properties, less funds required for
working capital purposes. The liability is expected to be fully repaid by
2003.
 
  The aggregate amount of long-term debt maturities, (including estimated
operating cash flows from properties designated for production payments) for
each of the five years after 1998 are: $5.3 million, $4.4 million, $3.4
million, $176.3 million and nil.
 
 Fair value of financial instruments
 
  The carrying amounts of cash, accounts receivable, accounts payable, and
accrued liabilities approximate fair value due to the short-term maturities of
these assets and liabilities. Based on the variable borrowing rates and re-
pricing terms currently available to the Company for the line of credit, the
carrying amounts of the Company's line of credit and the production payment
liabilities approximate fair value. The fair values of the line of credit and
Notes and production payments were $175.0 million and $158.8 million,
respectively, at December 31, 1998.
 
7. COMMON STOCK AND OPTIONS
 
 Common Stock
 
  In March 1998, the Company issued 260,917 shares of its common stock in an
acquisition of a company whose sole asset is a 15 percent interest in an oil
and gas license covering an area denominated as Block 67 located in the
Republic of Peru.
 
  In conjunction with a property acquisition transaction executed in April
1997, the Company issued a written put option that obligates the Company to
issue 150,000 shares of its common stock to the holder of the option should
the holder elect to exercise this option. The Company will then receive the
holder's one percent interest in a subsidiary of the Company. This option is
exercisable by the holder at any time prior to January 31, 2012. In addition,
the Company has a written call option, exercisable between January 1, 2002 and
January 31, 2012, that gives it the right to purchase the minority interest by
issuing the aforementioned common shares. The put option was recorded to
additional paid-in capital at a fair market value totaling $4.2 million, the
value of the Company's common stock to be issued pursuant to the option. The
fair market value was based on the market price of the Company's common stock
at the date the option was issued.
 
  In June 1997, the Company's shareholders voted to increase the authorized
number of shares of the Company's common stock from 35 million to 45 million.
 
                                     F-11
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
  In June 1996, the Company issued 5.4 million shares of common stock for
$26.375 per share in a public offering. The net proceeds from the issuance of
the shares totaled approximately $134.8 million after deducting issuance costs
and underwriting fees.
 
  The Company has a stockholders rights plan designed to insure that
stockholders receive full value for their shares in the event of certain
takeover attempts.
 
 Stock Options
 
  The Company has three employee stock option plans, a 1990 Plan, a 1994 Plan
and a 1997 Plan, under which the Company's common stock may be granted to
officers and other employees of the Company and subsidiaries. The 1990 Plan
provides for the granting of options to purchase 775,000 shares. The 1994 Plan
as amended, provides for the granting of options to purchase 1,000,000 shares
of the Company's common stock. The 1997 Plan provides for the granting of
options to purchase 1,500,000 shares of the Company's common stock. In
addition, the Company has a non-discretionary stock option plan, as amended,
under which options for an aggregate of 300,000 shares of the Company's common
stock may be granted to non-employee directors. In 1995, the Company assumed
pre-existing stock option plans of Plains and converted all options then
outstanding into options to acquire shares of the Company's common stock. No
further options will be granted under the Plains' plans.
 
  Pursuant to the plans, the exercise price of each option cannot be less than
the market price of the Company's stock on the date of grant. Options under
the Company's plans generally become exercisable in equal installments on each
of the first four anniversaries of the date of grant. All options granted
under the Plains option plans are currently exercisable. The options expire,
to the extent not exercised, between five and ten years after the date of the
grant, or within 90 days (30 days under the Plains plan) after the recipient's
earlier termination of employment with the Company. Options can be incentive
stock options or non-statutory stock options.
 
  On January 1, 1996, the Company adopted Statement of Financial Accounting
Standards No. 123, "Accounting for Stock Based Compensation" (SFAS No. 123).
The Company elected to continue to account for these plans under APB Opinion
No. 25, under which no compensation costs are recognized for option grants
that are equal to or greater than the market price at time of grant. If
compensation cost for these plans had been determined consistent with SFAS No.
123, the Company's net income (loss) and earnings (loss) per share would have
been reduced or increased as follows:
 
<TABLE>
<CAPTION>
                                                         For the Year Ended
                                                            December 31,
                                                      --------------------------
                                                        1998      1997    1996
                                                      ---------  ------- -------
                                                           (in thousands)
   <S>                                                <C>        <C>     <C>
   Net income (loss)
     As reported..................................... $ (93,743) $29,261 $29,526
     Pro forma....................................... $(101,008) $22,301 $27,277
   Net income (loss) per share
     As reported
       Basic......................................... $   (2.95) $   .93 $  1.04
       Diluted....................................... $   (2.95) $   .92 $  1.02
     Pro forma
       Basic......................................... $   (3.18) $   .71 $   .96
       Diluted....................................... $   (3.18) $   .70 $   .95
</TABLE>
 
                                     F-12
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
  Changes in outstanding stock options under these plans are summarized as
follows:
 
<TABLE>
<CAPTION>
                                 1998                 1997                 1996
                          -------------------- -------------------- --------------------
                                     Weighted-            Weighted-            Weighted-
                          Number of   Average  Number of   Average  Number of   Average
                           Option    Exercise   Option    Exercise   Option    Exercise
                           Shares      Price    Shares      Price    Shares      Price
                          ---------  --------- ---------  --------- ---------  ---------
<S>                       <C>        <C>       <C>        <C>       <C>        <C>
Outstanding at beginning
 of year................  2,088,208   $26.29   1,481,559   $22.50     986,546   $16.89
Granted.................  1,253,307    30.10     787,250    33.18     727,600    28.59
Exercised...............   (344,139)   16.96     (83,851)   16.48    (230,897)   17.72
Forfeited...............   (387,500)   31.15     (96,750)   32.74      (1,690)   23.96
                          ---------            ---------            ---------
Outstanding at end of
 year...................  2,609,876    28.63   2,088,208    26.29   1,481,559    22.50
                          =========            =========            =========
Options exercisable at
 year end...............    959,326              718,633              392,959
Weighted-average fair
 value of options
 granted during the
 year...................  $   17.27            $   20.69            $   17.74
</TABLE>
 
  The calculated value of stock options granted under these plans, following
calculation methods prescribed by SFAS No. 123, uses the Black-Scholes stock
option pricing model with the following weighted-average assumptions used:
 
<TABLE>
<CAPTION>
                                                            1998   1997   1996
                                                            -----  -----  -----
   <S>                                                      <C>    <C>    <C>
   Expected option life--years.............................  5.54   5.44   4.90
   Risk-free interest rate.................................  5.19%  6.78%  6.44%
   Dividend yield..........................................     0      0      0
   Volatility.............................................. 56.87% 57.47% 69.54%
</TABLE>
 
  The following table summarizes information about stock options outstanding
at December 31, 1998:
 
<TABLE>
<CAPTION>
                               Stock Options Outstanding              Stock Options Exercisable
                     ---------------------------------------------- -----------------------------
                                       Weighted-
                         Number         Average        Weighted-        Number       Weighted-
      Range of       Outstanding at    Remaining        Average     Exercisable at    Average
   Exercise Prices      12/31/98    Contractual Life Exercise Price    12/31/98    Exercise Price
   ---------------   -------------- ---------------- -------------- -------------- --------------
   <S>               <C>            <C>              <C>            <C>            <C>
       $ 5-16            109,501           .2            $12.99        109,501         $12.99
        16-21            230,004          2.4             19.06        205,004          18.99
        21-30            842,064          5.2             24.58        323,014          24.68
        30-43          1,428,307          5.5             33.76        321,807          34.08
                       ---------          ---            ------        -------         ------
                       2,609,876          4.9             28.63        959,326          25.28
                       =========                                       =======
</TABLE>
 
8. RETIREMENT BENEFITS
 
  The Company has a voluntary 401(k) employee savings plan. Under this plan,
as amended, the Company matches 100% of each participating employee's
contribution, up to a maximum of 6% of base salary, with one-half of the match
paid in cash and one-half of the match paid in the Company's common stock. The
employee's rights to the Company's matching contributions are subject to a
vesting schedule. Company contributions were $675,000, $434,000 and $341,000
in 1998, 1997 and 1996, respectively.
 
  Pursuant to a 1995 merger agreement between Plains and the Company, Plains'
employee benefit plans were terminated in 1995 and plan assets were
distributed to the participants. Final distribution of plan assets for Plains'
profit-sharing and 401(k) plans was made to participants during 1996. A final
distribution for Plains' executive deferred compensation plan and directors'
deferred plan was made to the participants by the trustee of the assets in
January 1998.
 
                                     F-13
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
9. HEDGING ACTIVITIES
 
 Hedging for Production
 
  The Company uses swap agreements to reduce the effect of natural gas price
volatility on a portion of its natural gas production. The objective of its
hedging activities is to achieve more predictable revenues and cash flows. In
a typical swap agreement, on a monthly basis for the term of the swap
agreement, the Company receives the difference between a fixed price per unit
of production and a price based on an agreed-upon third party index. The
Company reviews and monitors the credit standing of the counter party to each
of its swap agreements and believes that the counter party will fully comply
with its contractual obligations.
 
  As of December 31, 1998, the Company had in effect outstanding natural gas
swaps associated with its Rocky Mountain natural gas production of 27.8
million MMBtu for the year 1999 and 80.2 million MMBtu for the period of
January 2000 through 2003. Fixed prices associated with these swaps range from
$1.71 to $2.25 per MMBtu for 1999 and from $1.71 to $1.79 per MMBtu for
January 2000 through February 2003.
 
  At year-end 1997, the Company held Rocky Mountain natural gas production
hedging positions of 25.1 million MMBtu for the year 1998 and 104 million
MMBtu for the period of January 1999 through February 2003. Fixed prices for
these swaps ranged between $1.71 and $2.24 per MMBtu for 1998 and between
$1.71 and $1.79 per MMBtu for January 1999 through February 2003.
 
  Hedging gains and losses are recorded when the related gas or oil production
has been produced or delivered or the financial instrument expires. These
gains and losses offset prices that have been received for natural gas and oil
production. Net hedging gains (losses) are included in oil and gas revenues.
For the years ended December 31, 1998, 1997 and 1996, the Company's losses
under its production swap agreements were $0.7 million, $4.3 million and $5.0
million, respectively. Realized hedging losses for 1996 were offset by
approximately $1.2 million relating to a portion of such hedges that were held
by the Company as of December 31, 1995 and did not qualify for hedge
accounting due to a reduced correlation between the index price and the price
to be realized for certain physical gas deliveries. The unrealized hedging
costs were recorded as a liability in 1995.
 
 Hedging for Trading Activities
 
  As of December 31, 1998, the Company had in effect outstanding natural gas
swaps associated with its natural gas trading activities of 275.3 million
MMBtu, 14.0 million MMBtu and 5.5 million MMBtu for 1999, 2000 and 2001,
respectively. Fixed prices for 1999 range between $1.46 and $2.77 per MMBtu.
Hedges for the years 2000 and 2001 are priced at specific pipeline indices.
These swaps are in place to cover fixed price purchases and sales.
 
  At year-end 1997, the Company had in effect outstanding natural gas swaps
associated with its natural gas trading activities of 25.9 million MMBtu for
January through March 1998 with fixed prices of $1.58 to $3.12 per MMBtu and
14.4 million MMBtu for April 1998 through October 1999 with fixed prices of
$1.31 to $1.83 per MMBtu.
 
                                     F-14
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
10. COMMITMENTS AND CONTINGENCIES
 
 Lease Commitments
 
  The minimum future payments under the terms of operating leases, principally
for office space, are as follows:
 
<TABLE>
<CAPTION>
                                                                  (in thousands)
   <S>                                                            <C>
   Year ended December 31, 1999..................................     $1,276
   2000..........................................................      1,135
   2001..........................................................        532
   2002..........................................................        139
   2003..........................................................         33
                                                                      ------
                                                                      $3,115
                                                                      ======
</TABLE>
 
  Total minimum future rental payments have not been reduced by $108,000 of
sublease rentals to be received in 1999. Rent expense was $1,282,000,
$1,055,000 and $990,000 for the years ended December 31, 1998, 1997 and 1996,
respectively.
 
 Litigation
 
  The Internal Revenue Service (IRS) has examined the federal tax returns of
Plains, a subsidiary of Barrett Resources Corporation, for pre-merger calendar
years 1991, 1992 and 1993. The IRS issued a "Notice of Deficiency" of $5.3
million together with penalties of $1.1 million, and an undetermined amount of
interest. The IRS Notice of Deficiency resulted primarily from the IRS's
disallowance of certain net operating loss deductions claimed during the
periods under examination. These net operating losses originally had been
incurred by companies that were acquired by Tri-Power Petroleum, Inc. which
was then acquired by Plains in 1986. For years following 1993, the Company has
additional net operating loss carryforwards of approximately $30 million
related to the same acquisition.
 
  The IRS has also examined the federal tax returns of the Company for the
periods ended July 1995, December 1995 and December 1996. The IRS issued a
letter proposing changes to tax for those periods totaling $5.7 million. The
proposed tax changes resulted primarily from the disallowance of net operating
loss and merger related deductions claimed for the periods ended December 1995
and 1996. These net operating losses are the primary issue involved with the
earlier examination of the Plains' tax returns for the calendar years 1991
through 1993.
 
  Management disagrees with the IRS position in each of the examinations. In
management's opinion, the federal tax returns of both Barrett and Plains
reflect the proper federal income tax liability and the existing net operating
loss carryforwards are appropriate as supported by relevant authority. The
Company is vigorously contesting these proposed adjustments and believes its
positions will be substantially sustained. In connection with the audit of tax
years 1991 through 1993, the Company filed a petition on November 29, 1996
with the United States Tax Court requesting a redetermination of the IRS's
Notice of Deficiency. A trial of this matter was held in May 1998, and all
post-trial briefs have been filed. A decision is expected in the first half of
1999.
 
  Pursuant to an August 1996 decision of the United States Court of Appeals
for the District of Columbia Circuit (the "Circuit Court") and subsequent
orders of the FERC, natural gas producers who received reimbursement for
Kansas ad valorem taxes paid in the mid-1980's on top of the then maximum
lawful price for natural gas have been ordered to refund these tax
reimbursements plus interest. In connection with this decision, the Company
has refunded $5.46 million (principal and interest), including an escrowed
refund of $1.21 million attributable to royalty interest owners. As the
royalty interest owners reimburse the Company for their
 
                                     F-15
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
proportional share of the refund, the escrowed funds will be released to the
gas purchaser to whom the refund is owed. The Company will be obligated for
royalty owner refunds if it is unsuccessful in recouping these from royalty
owners and is unable to obtain FERC relief for the royalty-related refunds not
recouped. The Company is a party to an appeal challenging the FERC's orders
requiring producers to pay interest on these refund amounts. If this appeal is
successful, the Company will recover approximately $2.6 million of the amount
it has refunded.
 
  At December 31, 1998, the Company was a party to certain other legal
proceedings which have arisen out of the ordinary course of business. Based on
the facts currently available, in management's opinion the liability,
individually or in the aggregate, if any, to the Company resulting from such
actions, including those specifically mentioned above, will not have a
material adverse effect on the Company's consolidated financial position or
results of operations.
 
 Environmental
 
  At year-end 1998, there were no known environmental or other regulatory
matters related to the Company's operations which are reasonably expected to
result in a material liability to the Company. Compliance with environmental
laws and regulations has not had, and in management's opinion is not expected
to have, a material adverse effect on the Company's capital expenditures,
results of operations or competitive position.
 
11. INCOME TAXES
 
  The provision for income taxes consists of the following:
 
<TABLE>
<CAPTION>
                                                        1998     1997     1996
                                                      --------  -------  -------
                                                           (in thousands)
   <S>                                                <C>       <C>      <C>
   Current
     Federal......................................... $   (175) $    87  $   513
     State...........................................       90     (231)     794
                                                      --------  -------  -------
                                                           (85)    (144)   1,307
   Deferred
     Federal.........................................  (51,287)  17,345   12,833
     State...........................................   (4,396)     724      822
                                                      --------  -------  -------
                                                       (55,683)  18,069   13,655
                                                      --------  -------  -------
                                                      $(55,768) $17,925  $14,962
                                                      ========  =======  =======
</TABLE>
 
  The difference between the provision for income taxes and the amounts which
would be determined by applying the statutory federal income tax rate to
income before provision for income taxes is analyzed below:
 
<TABLE>
<CAPTION>
                                                     1998     1997    1996
                                                   --------  ------- -------
                                                        (in thousands)
   <S>                                             <C>       <C>     <C>
   Tax by applying the statutory federal income
    tax rate to pretax accounting income (loss)... $(52,323) $16,515 $15,571
   Increase (decrease) in tax from:
     State income taxes...........................   (4,306)     493   1,616
     Other, net...................................      861      917  (2,225)
                                                   --------  ------- -------
                                                   $(55,768) $17,925 $14,962
                                                   ========  ======= =======
</TABLE>
 
                                     F-16
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
  Long-term deferred tax assets (liabilities) are comprised of the following
at December 31, 1998 and 1997:
 
<TABLE>
<CAPTION>
                                                             1998      1997
                                                           --------  ---------
                                                             (in thousands)
   <S>                                                     <C>       <C>
   Deferred tax assets:
     Allowance for losses................................. $     40  $     --
     Partnership activities...............................    6,592      8,549
     Loss carryforwards and other.........................   64,060     44,400
                                                           --------  ---------
       Gross deferred tax assets..........................   70,692     52,949
   Deferred tax liabilities:
     Depreciation, depletion and amortization.............  (80,381)  (120,504)
     Capitalized interest on other assets.................     (305)      (229)
                                                           --------  ---------
       Gross deferred tax liabilities.....................  (80,686)  (120,733)
                                                           --------  ---------
   Net deferred tax liability.............................   (9,994)   (67,784)
   Valuation allowance....................................   (3,300)    (1,193)
                                                           --------  ---------
                                                           $(13,294) $ (68,977)
                                                           ========  =========
</TABLE>
 
  Valuation allowances of $3.3 million and $1.2 million were provided at
December 31, 1998 and 1997, respectively, based on carryforward amounts which
may not be utilized before expiration.
 
  The Company has net operating loss carryforwards available totaling $163.3
million, which expire in the years 1999 through 2010. The Company also has AMT
tax credits of $2.4 million.
 
  The 1995 merger with Plains also resulted in a change in the Company's and
Plains' ownership as defined by Section 382 of the Internal Revenue Code. The
change effectively limits the annual utilization of the Company's and Plains'
remaining net operating losses arising prior to the merger to $15,831,000 per
year for the Company. Portions of the above limitations which are not used
each year may be carried forward to future years.
 
12. Supplemental Cash Flow Schedules and Information
 
<TABLE>
<CAPTION>
                                                          1998    1997   1996
                                                         ------- ------ ------
                                                            (in thousands)
   <S>                                                   <C>     <C>    <C>
   Cash paid during years
     Income tax......................................... $   130 $  824 $  416
     Interest...........................................  20,384  8,079  3,809
   Supplemental information of noncash investing and
    financing activities:
     Issuance of common stock exchanged for treasury
      shares in cashless option transactions............ $   233 $  207 $  527
</TABLE>
 
  In March 1998, the Company issued 260,917 shares of common stock with a
market value of $9.1 million in an acquisition of a company. The acquired
company's sole asset is a 15 percent interest in an oil and gas license in the
area denominated as Block 67 located in the Republic of Peru.
 
  During 1998, the Company's production payment obligations were reduced by
certain tax credit benefits of $2.2 million directly attributed to the
properties burdened by the production payment and received by the holder of
the production payment liability.
 
                                     F-17
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
  During 1997, in separate transactions, the Company assumed a production
payment with a value of $2.8 million and issued a written put option on
150,000 shares of the Company's common stock with a market value of $4.2
million (at the date of issue) in connection with acquisitions of interests in
oil and gas properties located in the Uinta and Piceance Basins, respectively.
 
  During 1996, the Company issued 50,000 shares of common stock with a market
value of $1.9 million and exchanged certain oil and gas properties plus $13.4
million cash for oil and gas properties located in the Uinta Basin of Utah. In
addition, with respect to acquisitions of various oil and gas and related
properties located in the Piceance Basin of Colorado in 1996, the Company
issued 585,661 shares of common stock valued at $16.5 million and recognized
additional deferred taxes of $13.7 million, for the difference between the tax
basis and book basis of the properties acquired.
 
13. RELATED PARTIES
 
  During 1998, there were no transactions between the Company and its
directors, executive officers or known holders of greater than five percent of
the Company's Common Stock in which the amount involved exceeded $60,000 and
in which any of the foregoing persons had or will have a material interest.
 
  In April 1996, the Company acquired for $2.7 million from Zenith Drilling
Corporation ("Zenith") all of Zenith's oil and gas interests located in the
Piceance Basin of Colorado. In addition, the Company acquired all the stock of
Grand Valley Corporation ("GVC") in exchange for 350,000 shares of the
Company's common stock. The sole asset of GVC was an approximate 10% interest
in the Grand Valley Gathering System. The Company previously owned interests
in and is the operator of both the gathering system and the gas and oil assets
in which it acquired interests as a result of these transactions.
 
  A member of the Company's Board of Directors owns 89% of Zenith and, at the
time of the GVC transaction, was a director of GVC and owned 10% of GVC. Due
to these relationships, the terms of these transactions with Zenith and GVC
were negotiated on behalf of the Company by a Special Committee of the Board
of Directors of the Company, consisting of four independent outside directors.
The Company also obtained an opinion from an investment banking firm that the
terms of these transactions were fair to the Company.
 
  During the year ended December 31, 1996, Zenith was billed by the Company as
operator, approximately, $77,000 for Zenith's portion of lease operating
expenses and development costs in certain leases operated by the Company.
Also, as a result of Zenith's working interest in those leases, Zenith
received approximately $448,000 as its share of revenues for 1996.
 
                                     F-18
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
14. QUARTERLY INFORMATION (UNAUDITED)
 
<TABLE>
<CAPTION>
                                         Three Months Ended
                              ----------------------------------------
                               3/31/98   6/30/98   9/30/98   12/31/98
                              --------- --------- --------- ----------
                               (in thousands, except per share data)
   <S>                        <C>       <C>       <C>       <C>
   1998
   Net revenues.............. $ 130,687 $ 129,658 $ 147,072 $  213,890
   Gross margin(1)...........    20,807    15,989    13,891   (156,474)
   Income (loss) from
    operations(1)............    10,022     4,215     2,987   (166,735)
   Net income (loss).........     6,214     2,613     1,852   (104,422)
   Net income per share:
     Basic...................       .20       .08       .06      (3.24)
     Assuming dilution.......       .19       .08       .06      (3.24)
  --------
  (1)  In the quarter ended December 31, 1998, a pre-tax impairment
       charge of $168.3 million was recorded. (see Note 1).
 
<CAPTION>
                                         Three Months Ended
                              ----------------------------------------
                               3/31/97   6/30/97   9/30/97   12/31/97
                              --------- --------- --------- ----------
                               (in thousands, except per share data)
   <S>                        <C>       <C>       <C>       <C>
   1997
   Net revenues.............. $  75,768 $  70,496 $  88,660 $  145,049
   Gross margin..............    23,404    15,621    16,774     28,663
   Income from operations....    15,988     7,077     7,464     16,657
   Net income................     9,913     4,387     4,629     10,332
   Net income per share:
     Basic...................       .32       .14       .15        .33
     Assuming dilution.......       .31       .14       .14        .32
</TABLE>
 
                                      F-19
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
 
 
15. Business Segment Information
 
  The Company operates principally in two business segments: natural gas
trading and oil and gas exploitation and production. In addition to marketing
its own gas, the Company engages in natural gas trading activities, which
involves purchasing natural gas from third parties and selling natural gas to
other parties at prices and volumes that management anticipates will result in
profits to the Company.
 
  The Company evaluates segment performance based on the profit or loss from
operations before income taxes. Corporate general and administrative expenses
are unallocated except for certain direct costs associated with the Company's
trading activity. Consolidated and segment financial information is as
follows:
 
<TABLE>
<CAPTION>
                            Natural Gas Oil & Gas   Segment   Corporation &
                              Trading      E&P       Total     Unallocated  Consolidated
                            ----------- ---------  ---------  ------------- ------------
                                                  (in thousands)
   <S>                      <C>         <C>        <C>        <C>           <C>
   1998
   Revenues................  $412,982   $ 206,338  $ 619,320    $  5,430     $ 624,750
   Interest Income.........         0           0          0         649           649
                             --------   ---------  ---------    --------     ---------
     Total Revenues........   412,982     206,338    619,320       6,079       625,399
   DD&A....................         0      97,957     97,957       4,166       102,123
   Impairment..............         0     168,304    168,304           0       168,304
   Profit (loss)...........    13,782    (118,549)  (104,767)    (44,744)     (149,511)
   Assets..................         0     676,228    676,228     162,651       838,879
   Expenditures for
    assets.................         0     202,912    202,912       2,867       205,779
 
   1997
   Revenues................  $171,140   $ 207,914  $ 379,054    $  1,973     $ 381,027
   Interest Income.........         0           0          0       1,573         1,573
                             --------   ---------  ---------    --------     ---------
     Total Revenues........   171,140     207,914    379,054       3,546       382,600
   DD&A....................         0      69,056     69,056       3,333        72,389
   Profit (loss)...........     5,044      80,955     85,999     (38,812)       47,186
   Assets..................         0     738,952    738,952     133,749       872,701
   Expenditures for
    assets.................         0     315,980    315,980      15,173       331,153
 
   1996
   Revenues................  $ 46,862   $ 151,737  $ 198,599    $  3,213     $ 201,812
   Interest Income.........         0           0          0         760           760
                             --------   ---------  ---------    --------     ---------
     Total Revenues........    46,862     151,737    198,599       3,973       202,572
   DD&A....................         0      42,583     42,583       3,192        45,775
   Profit (loss)...........     2,241      61,837     64,078     (19,590)       44,488
   Assets..................         0     483,186    483,186      93,759       576,945
   Expenditures for
    assets.................         0     214,236    214,236      18,523       232,759
</TABLE>
 
  The Company's revenues are derived in the United States. The Company's long-
lived assets are located in the United States.
 
 
                                     F-20
<PAGE>
 
                     SUPPLEMENTAL OIL AND GAS INFORMATION
 
  The following information, pertaining to the Company's oil and gas producing
activities for the years ended December 31, 1998, 1997 and 1996, is presented
in accordance with Statement of Financial Accounting Standards No. 69,
"Disclosure About Oil and Gas Producing Activities" (SFAS No. 69).
 
Major Purchaser
 
  During 1998, one natural gas purchaser accounted for four percent of the
Company's total revenue (12 percent of oil and gas revenues). Sales of gas to
this same purchaser represented 8 percent and 11 percent of total revenues in
1997 and 1996, respectively.
 
Costs Incurred In Oil And Gas Exploration And Development Activities
 
  The following costs were incurred by the Company in oil and gas property
acquisition, exploration, and development activities during the years ended
December 31:
 
<TABLE>
<CAPTION>
                                                   1998      1997      1996
                                                 --------  --------  --------
                                                       (in thousands)
<S>                                              <C>       <C>       <C>
Acquisition of evaluated properties............. $  3,529  $ 45,148  $ 68,157
Acquisition of unevaluated properties:
  United States.................................   32,127    63,643    45,051
  Peru..........................................   12,089    10,597     1,229
Exploration costs:
  United States.................................   59,331   118,779    32,086
  Peru..........................................   15,196       --        --
Development costs...............................   84,577    93,701    69,651
Other, principally proceeds from mineral
 conveyances....................................   (7,185)  (14,253)   (1,948)
                                                 --------  --------  --------
Total additions to oil and gas properties....... $199,664  $317,615  $214,226
                                                 ========  ========  ========
</TABLE>
 
  Property acquisition costs include costs incurred to purchase, lease, or
otherwise acquire a property. Exploration costs include the costs of
geological and geophysical activity, dry holes, and drilling and equipping
exploratory wells. Development costs include costs incurred to gain access to
and prepare development well locations for drilling and to drill and equip
development wells.
 
  In addition, the Company incurred costs of $3.2 million in 1998 for various
supporting production facilities consisting principally of natural gas
gathering systems and processing plants. Production facility expenditures for
1997 and 1996 were $3.9 million and $15.1 million.
 
Oil And Gas Reserves (Unaudited)
 
  The following reserve related information for 1998 is based on estimates
prepared by the Company. All of the Company's reserves are located in the
United States. With the exception of the Company's coalbed methane reserves in
Wyoming, the 1998 reserve information for the Company was reviewed by Ryder
Scott, an independent reservoir engineer. The 1998 reserve information for the
Company's coalbed methane properties located in the Powder River Basin was
audited by Netherland, Sewell & Associates, Inc., an independent reservoir
engineer. The Company's 1997 and 1996 reserves were prepared by the Company
and reviewed by Ryder Scott as of December 31, 1997 and December 31, 1996.
Reserve estimates are inherently imprecise and are continually subject to
revisions based on production history, results of additional exploration and
development, prices of oil and gas and other factors.
 
 
                                     F-21
<PAGE>
 
<TABLE>
<CAPTION>
                                 1998                  1997                  1996
                         --------------------- --------------------- ---------------------
                         Oil (MBbl) Gas (Mmcf) Oil (MBbl) Gas (Mmcf) Oil (MBbl) Gas (Mmcf)
                         ---------- ---------- ---------- ---------- ---------- ----------
                                                  (in thousands)
<S>                      <C>        <C>        <C>        <C>        <C>        <C>
Proved developed and
 undeveloped reserves:
 Beginning of year......   18,651    851,244     23,231    674,893     12,967    513,531
 Revisions of previous
  estimates.............   (7,437)   (55,343)   (11,651)   (54,945)      (210)      (778)
 Purchase of minerals in
  place.................      --       3,520      1,910     52,303      6,628     95,914
 Extensions and
  discoveries...........      746    217,870      8,287    258,520      6,029    127,547
 Production.............   (2,033)   (94,893)    (2,235)   (76,625)    (1,913)   (60,883)
 Sale of minerals in
  place.................     (277)    (9,968)      (891)    (2,902)      (270)      (438)
                           ------    -------    -------    -------     ------    -------
 End of year............    9,650    912,430     18,651    851,244     23,231    674,893
                           ======    =======    =======    =======     ======    =======
Proved developed
 reserves:
 Beginning of year......   10,751    553,787     15,773    511,645     11,669    419,672
                           ======    =======    =======    =======     ======    =======
 End of year............    6,212    543,068     10,751    553,787     15,773    511,645
                           ======    =======    =======    =======     ======    =======
</TABLE>
 
Standardized Measure of Discounted Future Net Cash Flows
 
  The standardized measure of discounted future net cash flows is based on
estimated quantities of proved reserves and the future periods in which they
are expected to be produced and on year-end economic conditions. Estimated
future gross revenues are priced on the basis of year-end prices, except in
the case of contracts where the applicable contract price, including fixed and
determinable escalations, were used for the duration of the contract.
Estimated future gross revenues are reduced by estimated future development
and production costs, as well as certain abandonment costs and by estimated
future income tax expense. Future income tax expenses have been computed
considering the tax basis of the oil and gas properties plus available
carryforwards and credits.
 
  The standardized measure of discounted future net cash flows should not be
construed to be an estimate of the fair market value of the Company's proved
reserves. Estimates of fair value would also take into account anticipated
changes in future prices and costs, the reserve recovery variances from
estimated proved reserves and a discount factor more representative of the
time value of money and the inherent risks in producing oil and gas.
Significant changes in estimated reserve volumes or product prices could have
a material effect on the Company's consolidated financial statements.
 
<TABLE>
<CAPTION>
                                              1998        1997        1996
                                           ----------  ----------  ----------
                                                    (in thousands)
<S>                                        <C>         <C>         <C>
Future cash inflows....................... $1,927,074  $2,158,461  $2,893,217
Future production costs...................   (570,923)   (608,123)   (773,233)
Future development costs..................   (238,169)   (250,467)   (152,141)
Future income tax expenses................   (187,113)   (306,946)   (628,901)
                                           ----------  ----------  ----------
  Future net cash flows...................    930,869     992,925   1,338,942
10% annual discount for estimated timing
 of cash flows............................   (400,221)   (428,794)   (574,139)
                                           ----------  ----------  ----------
Standardized measure of discounted future
 net cash flows........................... $  530,648  $  564,131  $  764,803
                                           ==========  ==========  ==========
</TABLE>
 
  The estimate of future income taxes is based on the future net cash flows
from proved reserves adjusted for the tax basis of the oil and gas properties
but without consideration of general and administrative and interest expenses.
For standardized measure purposes the Company estimates future income taxes
using the "year-by-year" method. For ceiling test purposes, the Company
estimates future income taxes using the "short-cut" method.
 
                                     F-22
<PAGE>
 
  The following are the principal sources of changes in the standardized
measure of discounted future net cash flows:
 
<TABLE>
<CAPTION>
                                                1998       1997       1996
                                              ---------  ---------  ---------
                                                     (in thousands)
<S>                                           <C>        <C>        <C>
Net change in sales price and production
 costs....................................... $(103,105) $(457,246) $ 415,937
Changes in estimated future development
 costs.......................................    43,383     43,391     16,288
Sales and transfers of oil and gas produced,
 net of production costs.....................  (146,875)  (152,536)  (110,341)
Net change due to extensions and
 discoveries.................................   115,145    195,992    230,797
Net change due to purchases and sales of
 minerals in place...........................    (6,980)    32,153    167,235
Net change due to revisions in quantities....   (76,985)  (122,656)   (41,486)
Net change in income taxes...................    68,083    183,901   (249,836)
Accretion of discount........................    63,163     69,881     28,053
Other, principally revisions in estimates of
 timing of production........................    10,688      6,448     (1,718)
                                              ---------  ---------  ---------
Net changes..................................   (33,483)  (200,672)   454,929
Balance, beginning of year...................   564,131    764,803    309,874
                                              ---------  ---------  ---------
Balance, end of year......................... $ 530,648  $ 564,131  $ 764,803
                                              =========  =========  =========
</TABLE>
 
  The December 31, 1998 weighted average prices utilized for purposes of
estimating the Company's proved reserves and future net revenues were $9.35 per
barrel of oil and $2.01 per Mcf of natural gas.
 
 
                                      F-23
<PAGE>
 
                                  SIGNATURES
 
  Pursuant to the requirements of Section 13 or 15(d) of the Securities Act of
1934, the Registrant has duly caused this report to be signed on its behalf by
the undersigned, thereunto duly authorized.
 
                                          Barrett Resources Corporation
 
Date: March 17, 1999                             /s/ William J. Barrett
                                          By: _________________________________
                                                     William J. Barrett
                                              Chairman of the Board, and Chief
                                                     Executive Officer
 
Date: March 17, 1999                               /s/ John F. Keller
                                          By: _________________________________
                                                       John F. Keller
                                                Chief Financial Officer, and
                                                  Principal Financial and
                                                     Accounting Officer
 
<TABLE>
<CAPTION>
              Signature                          Title                   Date
              ---------                          -----                   ----
 
<S>                                    <C>                        <C>
      /s/ William J. Barrett                    Director            March 17, 1999
______________________________________
          William J. Barrett
 
       /s/ C. Robert Buford                     Director            March 17, 1999
______________________________________
           C. Robert Buford
 
         /s/ Derrill Cody                       Director            March 17, 1999
______________________________________
             Derrill Cody
 
     /s/ James M. Fitzgibbons                   Director            March 17, 1999
______________________________________
         James M. Fitzgibbons
 
    /s/ William W. Grant, III                   Director            March 17, 1999
______________________________________
        William W. Grant, III
 
        /s/ John F. Keller                      Director            March 17, 1999
______________________________________
            John F. Keller
 
        /s/ A. Ralph Reed                       Director            March 17, 1999
______________________________________
            A. Ralph Reed
 
       /s/ James T. Rodgers                     Director            March 17, 1999
______________________________________
           James T. Rodgers
 
   /s/ Philippe S.E. Schreiber                  Director            March 17, 1999
______________________________________
       Philippe S.E. Schreiber
</TABLE>
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                           ANNUAL REPORT ON FORM 10-K
 
                      For The Year Ended December 31, 1998
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
 Exhibit                               Description
 -------                               -----------
 <C>     <S>
  2.1    Agreement And Plan of Merger, dated as of May 2, 1995, among Barrett
         Resources Corporation ("Barrett" or "Registrant"), Barrett Energy Inc.
         (formerly known as Vanilla Corporation), and Plains Petroleum Company
         ("Plains") is incorporated by reference from Annex I to the Joint
         Proxy Statement/Prospectus of Barrett and Plains dated June 13, 1995.
 
  3.1    Restated Certificate Of Incorporation of Barrett Resources
         Corporation, a Delaware corporation, is incorporated herein by
         reference from Exhibit 3.2 of Registrant's Registration Statement on
         Form S-4 dated June 9, 1995.
 
  3.2    Certificate of Amendment to Certificate of Incorporation of Barrett
         dated June 17, 1997 is incorporated by reference from Exhibit 3.2 of
         Registrant's Annual Report on Form 10-K for the year ended December
         31, 1997.
 
  3.3    Bylaws of Barrett, as amended through February 25, 1999.
 
  4.1A   Form of Rights Agreement dated as of August 5, 1997 between Barrett
         and BankBoston, N.A., which includes, as Exhibit A thereto, the form
         of Certificate of Designations specifying the terms of the Series A
         Junior Participating Preferred Stock, and as Exhibit B thereto, the
         form of Rights Certificate, is incorporated by reference from Exhibit
         1 to the Company's Registration Statement on Form 8-A filed August 11,
         1997.
 
  4.1B   Amendment to Rights Agreement dated as of August 5, 1997 between
         Barrett and BankBoston, N.A.

  4.2    Revised Form of Indenture between the Company and Bankers Trust
         Company, as trustee, with respect to Senior Notes including specimen
         of 7.55% Senior Notes is incorporated by reference from Exhibit 4.1 to
         the Company's Amendment No. 1 to Registration Statement on Form S-3
         filed February 10, 1997, File No. 333-19363.
 
  4.3    Form of Indenture between the Registrant and Bankers Trust Company, as
         trustee, with respect to Debt Securities is incorporated by reference
         from Exhibit 4.2 of Registrant's Registration Statement on Form S-3
         filed May 6, 1998 (File No. 333-51985).
 
 10.1    Non-Qualified Stock Option Plan Of Barrett Resources Corporation is
         incorporated by reference from Registrant's Registration Statement on
         Form S-8 dated November 15, 1989.
 
 10.2    Registrant's 1990 Stock Option Plan, as amended, is incorporated by
         reference from the Registrant's Registration Statement on Form S-8
         dated March 15, 1995.
 
 10.3    Registrant's Non-Discretionary Stock Option, as amended, is
         incorporated by reference from Exhibit 99.2 of the Registrant's Proxy
         Statement dated April 24, 1997.
 
 10.4    Registrant's 1994 Stock Option Plan, as amended, is incorporated by
         reference from the Registrant's Registration Statement on Form S-8
         dated March 15, 1995.

 10.5    Registrant's 1997 Stock Option Plan is incorporated by reference from
         Exhibit 99.1 of the Registrant's Proxy Statement dated April 24, 1997.

 10.6A   Gas Purchase Contract, No. P-1090, dated April 20, 1984, as amended,
         between Plains and KN Energy, Inc. is incorporated by reference from
         Plains Petroleum Company's Registration Statement on Form 10 dated
         August 21, 1985.
 
</TABLE>
<PAGE>
 
<TABLE>
<CAPTION>
 Exhibit                               Description
 -------                               -----------
 <C>     <S>
 10.6B   Letter Agreement dated January 11, 1996, amending the Gas Purchase
         Contract, No. P-1090, dated April 20, 1984, between Plains and KN
         Energy, Inc. is incorporated by reference from Exhibit 10.5B of the
         Registrant's Annual Report on Form 10-K for the year ended December
         31, 1996.

 10.7A   Revolving Credit Agreement dated as of July 19, 1995 among Barrett and
         Texas Commerce Bank National Association, as Agent, and Texas Commerce
         Bank National Association, Nations Bank of Texas, N.A., Bank of
         Montreal, Houston Agency, Colorado National Bank, and The First
         National Bank of Boston, as the "Banks", is incorporated by reference
         from Exhibit 10.6 to Barrett's Annual Report on Form 10-K for the year
         ended December 31, 1995.
 
 10.7B   First Amendment to Revolving Credit Agreement dated October 31, 1996
         between and among Barrett, Agent and the Banks is incorporated by
         reference from Exhibit 10.1 to Amendment No. 2 to Barrett's
         Registration Statement on Form S-3 (File No. 333-19363) dated February
         10, 1997.
 
 10.7C   Second Amendment to Revolving Credit Agreement dated February 10, 1997
         between and among Barrett, the Agent, and the Banks is incorporated by
         reference from Exhibit 10.2 to Amendment No. 2 to Barrett's
         Registration Statement on Form S-3 (File No. 333-19363) dated February
         10, 1997.
 
 10.7D   Amended and Restated Credit Agreement dated November 12, 1997 between
         and among Barrett, the Agent, the Banks, and The Chase Manhattan Bank
         as the "Competitive Bid Auction Agent" is incorporated by reference
         from Exhibit 10.7D to Registrant's Annual Report on Form 10-K for the
         year ended December 31, 1997.
 
 10.7E   First Amendment to Amended and Restated Credit Agreement dated
         December 19, 1997 between and among Barrett, the Agent, the Banks, and
         the Competitive Bid Auction Agent is incorporated by reference from
         Exhibit 10.7E to Registrant's Annual Report on Form 10-K for the year
         ended December 31, 1997.
 
 10.8A   Severance Protection Agreement dated February 6, 1998 between
         Registrant and William J. Barrett is incorporated by reference from
         Exhibit 10.8 to Registrant's Annual Report on Form 10-K for the year
         ended December 31, 1997.
 
 10.8B   Amendment No. 1 to Severance Protection Agreement dated November 19,
         1998 between Registrant and William J. Barrett.
 
 10.9A   Form of Severance Protection Agreement between Barrett and each of A.
         Ralph Reed, J. Frank Keller, Peter A. Dea and Bryan G. Hassler is
         incorporated by reference from Exhibit 10.9A to Registrant's Annual
         Report on Form 10-K for the year ended December 31, 1997.

 10.9B   Schedule Identifying Material Differences Among Severance Protection
         Agreements between Barrett and each of A. Ralph Reed, J. Frank Keller,
         Peter A. Dea, and Bryan G. Hassler.
 
 21      List of Subsidiaries.
 
 23.1    Consent of Arthur Andersen LLP.
 
 23.2    Consent of Ryder Scott Company.
 
 23.3    Consent of Netherland, Sewell & Associates, Inc.
 
 27      Financial Data Schedule.
</TABLE>

<PAGE>
 
                                                                     EXHIBIT 3.3

                                    BYLAWS



                                      OF



                         BARRETT RESOURCES CORPORATION



(As revised pursuant to a unanimous written Consent Of Directors effective as of
                              February 25, 1999)
<PAGE>
 
                                    BYLAWS

                                      OF

                         BARRETT RESOURCES CORPORATION

                                  ARTICLE I.

                                    Offices
                                    -------

          The registered office of the corporation shall be in the City of
Wilmington, County of New Castle, State of Delaware or such other city and
county as the board of directors shall determine.

          The corporation may also have offices at such other places both within
and without the State of Delaware as the board of directors may from time to
time determine or the business of the corporation may require.

                                  ARTICLE II.

                                 Stockholders
                                 ------------

          Section 1.  Annual Meeting.  Beginning in 1988, the annual meeting of
                      --------------                                           
the stockholders shall be held at a time and date fixed by the board of
directors for the purpose of electing directors and for the transaction of such
other business as may come before the meeting.  If the election of directors
shall not be held at the annual meeting of the stockholders, or at any
adjournment thereof, the board of directors shall cause the election to be held
at a special meeting of the stockholders as soon thereafter as conveniently may
be.

          Section 2.  Special Meetings.  Special meetings of the stockholders,
                      ----------------                                        
for any purpose, unless otherwise prescribed by statute, may be called by the
president or by the board of directors.

          Section 3.  Place Of Meeting.  The person or persons authorized to
                      ----------------                                      
call any annual or special meeting may designate any place, either within or
outside Delaware, as the place for the meeting.  A waiver of notice signed by
all stockholders entitled to vote at a meeting may designate any place, either
within or outside Delaware, as the place for such meeting.  If no designation is
made, the place of meeting shall be the principal corporate offices of the
corporation.

          Section 4. Record Dates.
                     ------------ 

          (a) Meetings.  In order that the Corporation may determine the
              --------                                                  
stockholders entitled to notice of, or to vote at, any meeting of stockholders
or any adjournment thereof, or entitled to receive payment of any dividend or
other distribution or allotment of any rights, or entitled to exercise any
rights in respect of any change, conversion or exchange of stock or for the

                                       2
<PAGE>
 
purpose of any other lawful action, the Board of Directors may fix, in advance,
a record date, which shall not be more than 60 nor less than ten days before the
record date is fixed:  (1) the record date for determining stockholders entitled
to notice of, or to vote at, a meeting of stockholders shall be at the close of
business on the day next preceding the day on which notice is given, or, if
notice is waived, at the close of business on the day next preceding the day on
which the meeting is held; and (2) the record date for determining stockholders
for any other purpose shall be at the close of business on the day on which the
Board of Directors adopts the resolution relating thereto.  A determination of
stockholders of record entitled to notice of or to vote at a meeting of
stockholders shall apply to any adjournment of the meeting; provided, however,
that the Board of Directors may fix a new record date for the adjourned meeting.

          (b) Record Date for Action by Written Consent.  In order that the
              -----------------------------------------                    
Corporation may determine the stockholders entitled to consent to corporate
action in writing without a meeting, the Board of Directors may fix a record
date, which record date shall not precede the date upon which the resolution
fixing the record date is adopted by the Board of Directors, and which date
shall not be more than ten (10) days after the date upon which the resolution
fixing the record date is adopted by the Board of Directors.  Any stockholder of
record seeking to have the stockholders authorize or take corporate action by
written consent shall, by written notice to the Secretary, request the Board of
Directors to fix a record date.  The Board of Directors shall reasonably
promptly, but in all events within ten (10) business days after the date on
which such a request is received, adopt a resolution fixing the record date
(unless a record date has previously been fixed by the Board of Directors
pursuant to the first sentence of this Section 4(b)).  If no record date has
been fixed by the Board of Directors pursuant to the first sentence of this
Section 4(b) or otherwise within ten (10) business days after the date on which
such a request is received, the record date for determining stockholders
entitled to consent to such corporate action in writing without a meeting, when
no prior action by the Board of Directors is required by applicable law, shall
be the first date on which a signed written consent setting forth the action
taken or proposed to be taken is delivered to the Corporation by delivery to its
registered office in the State of Delaware, its principal place of business, or
any officer or agent of the Corporation having custody of the book in which
proceedings of stockholders meetings are recorded, to the attention of the
Secretary.  Delivery shall be by hand or by certified or registered mail, return
receipt requested.  If no record date has been fixed by the Board of Directors
and prior action by the Board of Directors is required by applicable law, the
record date for determining stockholders entitled to consent to corporate action
in writing without a meeting shall be the close of business on the date on which
the Board of Directors adopts the resolution taking such prior action.

          Section 5.  Notice Of Meeting.  Written notice stating the place, day
                      -----------------                                        
and hour of the meeting, and, in the case of a special meeting, the purpose or
purposes for which the meeting is called, shall be delivered not less than ten
nor more than 60 days before the date of the meeting, unless otherwise required
by statute, either personally or by mail, to each stockholder of record entitled
to vote at such meeting.  If mailed, such notice shall be deemed to be delivered
when deposited in the United States mail, addressed to the stockholder at his
address as it appears on the stock books of the corporation, with postage
thereon prepaid.  When a meeting is adjourned to another time or place, notice
need not be given of the adjourned meeting if the time and place 

                                       3
<PAGE>
 
thereof are announced at the meeting at which the adjournment is taken. At the
adjourned meeting the corporation may transact any business which might have
been transacted at the original meeting.

          Section 6.  Organization.  The president or any vice president shall
                      ------------                                            
call meetings of stockholders to order and act as chairman of such meetings.  In
the absence of said officers, any stockholder entitled to vote at that meeting,
or any proxy of any such stockholder, may call the meeting to order and a
chairman shall be elected by a majority of the stockholders entitled to vote at
that meeting.  In the absence of the secretary or any assistant secretary of the
corporation, any person appointed by the chairman shall act as secretary of such
meetings.

          Section 7.  Agenda And Procedure.  The board of directors shall have
                      --------------------                                    
the responsibility of establishing an agenda for each meeting of stockholders,
subject to the rights of stockholders to raise matters for consideration which
may otherwise properly be brought before the meeting although not included
within the agenda.  The chairman shall be charged with the orderly conduct of
all meetings; provided however, that in the event of any difference in opinion
with respect to the proper cause of action which cannot be resolved by reference
to statute, or to the articles of incorporation or these bylaws, Robert's Rules
Of Order (as last revised) shall govern the disposition of the matter.

          Section 8.  Voting Lists.  The officer who has charge of the stock
                      ------------                                          
books of the corporation shall prepare and make, at least ten days before every
meeting of stockholders, a complete list of the stockholders entitled to vote at
the meeting, arranged in alphabetical order, and showing the address of each
stockholder and the number of shares registered in the name of each stockholder.
Such list shall be open to the examination of each stockholder, for any purpose
germane to the meeting, during ordinary business hours, for a period of at least
ten days prior to the meeting, either at a place within the city where the
meeting is to be held, which place shall be specified in the notice of the
meeting, or if not so specified, at the place where the meeting is to be held.
The list shall also be produced and kept at the time and place of the meeting
during the whole time thereof, and may be inspected by any stockholder who is
present.

          Section 9.  Quorum.  The majority of the outstanding shares of the
                      ------                                                
corporation entitled to vote, represented in person or by proxy, shall
constitute a quorum at a meeting of stockholders for the transaction of business
except as otherwise provided by statute or the certificate of incorporation.  If
fewer than a majority of the outstanding shares are represented at a meeting, a
majority of the shares so represented may adjourn the meeting from time to time
in accordance with Section 5 of this Article II until a quorum shall be present
or represented.

          Section 10.  Manner Of Acting.  When a quorum is present at any
                       ----------------                                  
meeting, the affirmative vote of a majority of the shares represented at the
meeting and entitled to vote on the subject matter shall be the act of the
stockholders, unless a different vote is required by law or the certificate of
incorporation, in which case such express provision shall govern.

          Section 11.  Informal Action By Stockholders.
                       ------------------------------- 

                                       4
<PAGE>
 
          (a) Unless otherwise provided in the certificate of incorporation, any
action required or permitted to be taken at any meeting of the stockholders may
be taken without a meeting, without prior notice and without a vote, provided
that a consent in writing, setting forth the action so taken, shall be signed by
the holders of outstanding stock having not less than the minimum number of
votes that would be necessary to authorize or take such action at a meeting at
which all shares entitled to vote thereon were present and voted.  Prompt notice
of the taking of the corporate action without a meeting by less than unanimous
written consent shall be given to those stockholders who have not consented in
writing.  In the event that the action which is consented to is such as would
require the filing of a certificate with the Secretary of State of Delaware
under the General Corporation Law of the State of Delaware if such action had
been voted on by stockholders at a meeting thereof, the certificate filed shall
state, in lieu of any statement required under law concerning any vote of
stockholders, that written consent has been given in accordance with the
provision of law and that written notice has been given as provided by law.

          (b) Review of Written Consent.  In the event of the delivery, in the
              -------------------------                                       
manner provided by Section 4(b), to the Corporation of the requisite written
consent or consents to take corporate action and/or any related revocation or
revocations (each such written consent and related revocation is referred to in
this Section 11(b) as a "Consent"), the Secretary shall provide for the safe-
keeping of such Consent and shall conduct such reasonable investigation as he or
she deems necessary or appropriate for the purpose of ascertaining the validity
of the Consent and all matters incident thereto, including, without limitation,
whether stockholders having the requisite voting power to authorize or take the
action specified in the Consent have given consent; provided, however, that if
the corporate action to which the Consent relates is the election, designation,
appointment, removal or replacement of one or more members of the Board of
Directors, the Secretary shall engage nationally recognized independent
inspectors of elections for the purpose of performing the actions of the
Secretary under this Section 11(b).  For the purpose of permitting the Secretary
or the independent inspectors (as the case may be) to perform the functions
under this Section 11(b), no action by written consent without a meeting shall
be effective until such date as the Secretary or the independent inspectors (as
the case may be) certify to the Corporation that the Consents delivered to the
Corporation in accordance with Section 11(b) represent at least the minimum
number of votes that would be necessary to take the corporate action.  Nothing
contained in this Section 11(b) shall in any way be construed to suggest or
imply that the Board of Directors or any stockholder shall not be entitled to
contest the validity of any Consent, whether before or after such investigation
or certification by the Secretary or the independent inspectors (as the case may
be), or to take any other actions including, without limitation, the
commencement, prosecution or defense of any litigation with respect thereto, and
the seeking of injunctive relief in such litigation.

          (c) Effectiveness of Written Consent.  Every written consent shall
              --------------------------------                              
bear the date of signature of each stockholder who signs the written consent and
no written consent shall be effective to take the corporate action referred to
therein unless, within sixty (60) days after the date the earliest dated written
consent was received in accordance with Section 4(b), a written consent or
consents signed by a sufficient number of stockholders to take such action are
delivered to the 

                                       5
<PAGE>
 
Corporation in the manner prescribed in Section 4(b).

          Section 12.  Proxies.  Each stockholder entitled to vote at a meeting
                       -------                                                 
of stockholders or to express consent or dissent to corporate action in writing
without a meeting may authorize any other person or persons to act for him by
proxy, but no such proxy shall be voted or acted upon after three years from its
date unless the proxy provides for a longer period.

          Section 13.  Voting Of Shares.  Unless otherwise provided in the
                       ----------------                                   
certificate of incorporation and subject to the provisions of Section 4 of this
Article II, each stockholder shall be entitled to one vote for each share of
capital stock held by such stockholder.  In the election of directors, each
record holder of stock entitled to vote at such election shall have the right to
vote the number of shares owned by him for as many persons as there are
directors to be elected, and for whose election he has the right to vote.
Cumulative voting shall not be allowed.

          Section 14.  Voting Of Shares By Certain Holders.  Persons holding
                       -----------------------------------                  
stock in a fiduciary capacity shall be entitled to vote the shares so held.
Persons whose stock is pledged shall be entitled to vote, unless in the transfer
by the pledgor on the books of the corporation the pledgor has expressly
empowered the pledgee to vote thereon, in which case only the pledgee or his
proxy may represent such shares and vote thereon.  If shares stand of record in
the names of two or more persons, whether fiduciaries, members of a partnership,
joint tenants, tenants in common, tenants by the entirety or otherwise, or if
two or more persons have the same fiduciary relationship respecting the same
shares, unless the secretary of the corporation is given written notice to the
contrary and if furnished with a copy of the instrument or order appointing them
or creating the relationship wherein it is so provided, their acts with respect
to voting shall be as set forth in the General Corporation Law of the State of
Delaware.

          Section 15.  Inspectors.  The chairman of the meeting may at any time
                       ----------                                              
appoint one or more inspectors to serve at a meeting of the stockholders.  Such
inspector(s) shall decide upon the qualifications of voters, including the
validity of proxies, accept and count the votes for and against the questions
presented, report the results of such votes, and subscribe and deliver to the
secretary of the meeting a certificate stating the number of shares of stock
issued and outstanding and entitled to vote thereon and the number of shares
voted for and against the questions presented.  The inspector(s) does not need
to be a stockholder of the corporation, and any director or officer of the
corporation may be an inspector on any question other than a vote for or against
his election to any position with the corporation or on any other question in
which he may be directly interested.

          Section 16.  Stockholder Proposals.  At any special meeting of the
                       ---------------------                                
stockholders, only such business shall be conducted as shall have been brought
before the meeting by or at the direction of the Board of Directors (or any duly
authorized committee thereof).  No business may be transacted at an annual
meeting of stockholders, other than business that is either (a) specified in the
notice of meeting (or any supplement thereto) given by or at the direction of
the Board of Directors (or any duly authorized committee thereof), (b) otherwise
properly brought before the annual meeting by or at the direction of the Board
of Directors (or any duly authorized committee thereof) or (c) otherwise
properly brought before the annual meeting by any stockholder of the 

                                       6
<PAGE>
 
Corporation (i) who is a stockholder of record on the date of the giving of the
notice provided for in this Section 16 and on the record date for the
determination of stockholders entitled to vote at such annual meeting and (ii)
who complies with the notice procedures set forth in this Section 16.

          In addition to any other applicable requirements, for business to be
properly brought before an annual meeting by a stockholder, such stockholder
must have been given timely notice thereof in proper written form to the
Secretary of the Corporation.

          To be timely, a stockholder's notice to the Secretary must be
delivered to or mailed and received at the principal executive offices of the
Corporation not less than ninety (90) days nor more than 130 days prior to the
date of the anniversary of the previous year's annual meeting; provided,
however, that in the event the annual meeting is scheduled to be held on a date
more than thirty (30) days prior to or delayed by more than sixty (60) days
after such anniversary date, notice by the stockholder in order to be timely
must be so received not later than the later of the close of business ninety
(90) days prior to such annual meeting or the tenth (10/th/) day following the
day on which such notice of the date of the annual meeting was mailed or such
public disclosure of the date of the annual meeting was first made by the
Corporation.  (Notwithstanding the foregoing, only in the case of the annual
meeting for 1999, to be timely, a stockholder's notice to the Secretary must be
delivered to or mailed and received at the principal executive offices of the
Corporation not less than the later of thirty (30) days prior to the date of the
meeting or ten (10) days after the first public disclosure by the Corporation of
the requirements of this Section 16, by filing a copy of this Section 16 in any
filing with the Securities and Exchange Commission or otherwise.)  In no event
shall the public announcement of an adjournment of an annual meeting commence a
new time period for a giving of a stockholder's notice under this Section 16.

          To be in proper written form, a stockholder's notice to the Secretary
must set forth as to each matter such stockholder proposes to bring before the
annual meeting (i) a brief description of the business desired to be brought
before the annual meeting and the reasons for conducting such business at the
annual meeting, (ii) the name and record address of such stockholder, (iii) the
class or series and number of shares of capital stock of the Corporation which
are owned beneficially or of record by such stockholder, (iv) a description of
all arrangements or understandings between such stockholder and any other person
or persons (including their names) in connection with the proposal of such
business by such stockholder and any material interest of such stockholder in
such business, (v) the names and addresses of other stockholders known by the
stockholder proposing such business to support the proposal, and the class and
number of shares of the Corporation's capital stock known to be beneficially
owned by such other stockholders, and (vi) a representation that such
stockholder intends to appear in person or by proxy at the annual meeting to
bring such business before the meeting.

          No business shall be conducted at the annual meeting of stockholders
except business brought before the annual meeting in accordance with the
procedures set forth in this Section 16, provided, however, that, once business
has been properly brought before the annual meeting in accordance with such
procedures, nothing in this Section 16 shall be deemed to preclude discussion by
any stockholder of any such business.  If the Chairman of an annual meeting

                                       7
<PAGE>
 
determines that business was not properly brought before the annual meeting in
accordance with the foregoing procedures, the Chairman shall declare to the
meeting that the business was not properly brought before the meeting and such
business shall not be transacted.

                                 ARTICLE III.

                              Board Of Directors
                              ------------------

          Section 1.  General Powers.  The business and affairs of the
                      --------------                                  
corporation shall be managed by or under the direction of its board of
directors, except as otherwise provided in the General Corporation Law of the
State of Delaware or the certificate of incorporation.

          Section 2.  Number, Tenure And Qualification.  The number of directors
                      --------------------------------                          
of the corporation shall be as determined by the board of directors and shall be
not fewer than three nor more than 13.  Directors shall be elected at each
annual meeting of stockholders except as otherwise provided in Section 3 of this
Article III or the certificate of incorporation.  Each director shall hold
office until his successor shall have been elected and qualified or until the
earliest of his death, resignation or removal.  Directors need not be residents
of Delaware or stockholders of the corporation.

          Any amendment or repeal of any provision or all provisions of this
Article III, Section 2, or the adoption of any provision inconsistent with any
provision or all provisions of this Article III, Section 2, shall, in addition
to any other vote or approval required by law or by these bylaws or by the
certificate of incorporation, require the affirmative vote of (a) at least 75
percent of all the directors including at least two-thirds of the Independent
Directors (as defined in Article IV, Section 9 of these bylaws, together with
other capitalized terms used in Article III of these bylaws), or (b) (i) at
least 66  percent of the outstanding shares of each class of Voting Stock, and
(ii) at least a majority, not including shares owned by Interested Persons, of
the outstanding shares of each class of Voting Stock.

          Section 3.  Notice Of Nominations.  Nominations for the election of
                      ---------------------                                  
directors may be made by the board of directors or a committee of the board of
directors or by any stockholder entitled to vote for the election of directors.
Nominations by the board of directors or a committee of the board of directors
may be made by oral or written notice delivered to the secretary of the
corporation by any officer or director on behalf of the board of directors or
committee at any time prior to or at any meeting of the stockholders at which
directors are to be elected. Each notice of nomination of directors by the board
of directors or a committee of the board of directors shall set forth the names
of the nominees.  (A) Nominations by stockholders for all meetings prior to and
including the annual meeting of stockholders held in 1999 shall be made by
notice in writing, delivered or mailed by first class United States mail,
postage prepaid, to the secretary of the corporation not less than 53 days nor
more than 90 days prior to any meeting of the stockholders at which directors
are to be elected; provided, however, that if less than 60 days' notice of the
meeting is given to stockholders, written notice of nominations of directors by
stockholders shall be delivered or mailed, as prescribed, to the Secretary of
the Corporation not later than the close of the 

                                       8
<PAGE>
 
seventh day following the day on which notice of the meeting was mailed to
stockholders and (B) for all meetings of stockholders after the annual meeting
of stockholders held in 1999 nominations by stockholders shall be made by notice
in writing, delivered or mailed by first class United States mail, postage
prepaid, to the Secretary of the Corporation not less than ninety (90) days nor
more than 130 days prior to (i) any meeting (other than an annual meeting) at
which directors are to be elected, appointed or designated or, (ii) in the case
of an annual meeting, the anniversary of the previous year's annual meeting;
provided, however, if, (x) in the case of an annual meeting, the annual meeting
is scheduled to be held on a date more than thirty (30) days prior to or delayed
by more than sixty (60) days after such anniversary date or, (y) in the case of
any other meeting, less than 100 days' notice of the meeting is given to
stockholders, then notice by the stockholder must be delivered to the
Corporation no later than the later of the close of business ninety (90) days
prior to such meeting or the tenth day following the day on which notice of the
date of the meeting was mailed or public disclosure of the date of the meeting
was first made by the Corporation (and in no event shall the public announcement
of an adjournment of the meeting commence a new time period for a giving of a
stockholder's notice under this Section). Nominations by stockholders for
directors to be elected by written consent of stockholders shall be made by
notice in writing, delivered or mailed by first class United States mail,
postage prepaid, to the secretary of the corporation not less than 60 days nor
more than 90 days prior to the first solicitation of any written consents of
stockholders for the election of those nominees. To be in proper written form, a
stockholder's notice to the Secretary must set forth (a) as to each person whom
the stockholder proposes to nominate for election as a director (i) the name,
age, business address and residence address of the person, (ii) the principal
occupation or employment of the person, (iii) the class or series and number of
shares of capital stock of the Corporation which are owned beneficially or of
record by the person and (iv) any other information relating to the person that
would be required to be disclosed in a proxy statement or other filings required
to be made in connection with solicitations of proxies for election of directors
pursuant to Section 14 of the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), and the rules and regulations promulgated thereunder; and (b)
as to the stockholder giving the notice (i) the name and record address of such
stockholder, (ii) the class or series and number of shares of capital stock of
the Corporation which are owned beneficially or of record by such stockholder,
(iii) a description of all arrangements or understandings between such
stockholder and each proposed nominee and any other person or persons (including
their names) pursuant to which the nomination(s) are to be made by such
stockholder, (iv) a representation that such stockholder intends to appear in
person or by proxy at the meeting to nominate the persons named in its notice
and (v) any other information relating to such stockholder that would be
required to be disclosed in a proxy statement or other filings required to be
made in connection with solicitations of proxies for election of directors
pursuant to Section 14 of the Exchange Act and the rules and regulations
promulgated thereunder. Such notice must be accompanied by a written consent of
each proposed nominee to being named as a nominee and to serve as a director if
elected. No person shall be eligible for election as a director of the
Corporation unless nominated in accordance with the procedures set forth in this
Section. The chairman of any meeting of stockholders of the corporation may, if
the facts warrant, determine and declare to the meeting that a nomination was
not made in accordance with the foregoing procedure, and if the chairman should
so determine, the chairman shall so declare to the meeting and the defective
nomination shall be disregarded.

                                       9
<PAGE>
 
          Any amendment or repeal of any provision or all provisions of this
Article III, Section 3, or the adoption of any provision inconsistent with any
provision or all provisions of this Article III, Section 3, shall, in addition
to any other vote or approval required by law or by these bylaws or by the
certificate of incorporation, require the affirmative vote of (a) at least 75
percent of all the directors including at least two-thirds of the Independent
Directors, or (b) (i) at least 66 percent of the outstanding shares of each
class of Voting Stock, and (ii) at least a majority, not including shares owned
by Interested Persons, of the outstanding shares of each class of Voting Stock.

          Section 4.  Vacancies.  Any director may resign at any time by giving
                      ---------                                                
written notice to the corporation.  Such resignation shall take effect at the
time specified therein; and unless otherwise specified therein, the acceptance
of such resignation shall not be necessary to make it effective.  Any vacancy or
newly created directorship resulting from an increase in the authorized number
of directors may be filled by the affirmative vote of the majority of directors
then in office, although less than a quorum, or by a sole remaining director,
and a director so chosen shall hold office until the next annual election and
until his successor is duly elected and qualified, unless sooner displaced.  If
at any time, by reason of death, resignation or other cause, the corporation
should have no directors in office, then an election of directors may be held in
the manner provided by law.  When one or more directors shall resign from the
board, effective at a future date, a majority of the directors then in office,
including those who have so resigned, shall have the power to fill any vacancy
or vacancies, with the vote thereon to take effect when such resignation or
resignations shall become effective, and each director so chosen shall hold
office until the next annual election and until his successor is duly elected
and has qualified.

          Section 5.  Regular Meetings.  Unless otherwise approved by the board
                      ----------------                                         
of directors, a regular meeting of the board of directors shall be held without
other notice than this bylaw immediately after and at the same place as the
annual meeting of stockholders.  The board of directors may provide by
resolution the time and place, either within or outside Delaware, for the
holding of additional regular meetings without other notice than such
resolution.

          Section 6.  Special Meetings.  Special meetings of the board of
                      ----------------                                   
directors may be called by or at the request of the president or any two
directors.  The person or persons authorized to call special meetings of the
board of directors may fix any place, either within or outside Delaware, as the
place for holding any special meeting of the board of directors called by them.


          Section 7.  Notice.  Notice of any special meeting shall be given at
                      ------                                                  
least five days previously thereto by written notice delivered personally or
mailed to each director at his business address, or by notice given at least two
days previously thereto by telegraph.  If mailed, such notice shall be deemed to
be delivered when deposited in the United States mail so addressed, with postage
thereon prepaid.  If notice be given by telegram, such notice shall be deemed to
be delivered when the telegram is delivered to the telegraph company.  Neither
the business to be transacted at, nor the purpose of, any regular or special
meeting of the board of directors need be 

                                       10
<PAGE>
 
specified in the notice or waiver of notice of such meeting.

          Section 8.  Quorum.  A majority of the number of directors then in
                      ------                                                
office shall constitute a quorum for the transaction of business at any meeting
of the board of directors, but if less than such majority is present at a
meeting, a majority of the directors present may adjourn the meeting from time
to time, without notice other than announcement at the meeting, until a quorum
shall be present.

          Section 9.  Manner Of Acting.  The vote of the majority of the
                      ----------------                                  
directors present at a meeting at which a quorum is present shall be the act of
the board of directors, except as may be otherwise specifically provided by law
or the certificate of incorporation.

          Section 10. Removal.  Unless otherwise restricted by law, any
                      -------                                          
director or the entire board of directors may be removed, with or without cause,
by the holders of a majority of shares then entitled to vote at a meeting of
stockholders.

          Section 11. Committees.  The board of directors may, by resolution
                      ----------                                            
passed by a majority of the whole board, designate one or more committees, each
committee to consist of one or more of the directors of the corporation.  The
board may designate one or more directors as alternate members of any committee,
who may replace any absent or disqualified member at any meeting of the
committee.  In the absence or disqualification of a member of a committee, the
member or members thereof present at any meeting and not disqualified from
voting, whether or not they constitute a quorum, may unanimously appoint another
member of the board of directors to act at the meeting in the place of such
absent or disqualified member.  Any such committee, to the extent provided in
the resolution of the board of directors, shall have and may exercise all the
powers and authority of the board of directors in the management of the business
and affairs of the corporation, and may authorize the seal of the corporation to
be affixed to all papers which may require it; but no such committee shall have
the power or authority in reference to amend the certificate of incorporation,
to adopt an agreement of merger or consolidation, to recommend to the
stockholders the sale, lease or exchange of all or substantially all of the
corporation's property and assets, to recommend to the stockholders a
dissolution of the corporation or a revocation of a dissolution, or to amend the
bylaws of the corporation; and, unless the resolution expressly so provides, no
such committee shall have the power or authority to declare a dividend or to
authorize the issuance of stock.  Each committee shall keep regular minutes of
its meetings and report the same to the board of directors when required.

          Section 12. Compensation.  Unless otherwise restricted by the
                      ------------                                     
certificate of incorporation or these bylaws, the board of directors shall have
the authority to fix the compensation of directors.  The directors may be paid
their expenses, if any, of attendance at such meeting of the board of directors
and may be paid a fixed sum for attendance at each meeting of the board of
directors or a stated salary as director.  No such payment shall preclude any
director from serving the corporation in any other capacity and receiving
compensation therefor.  Members of any committee of the board may be allowed
like compensation for attending committee meetings.

                                       11
<PAGE>
 
          Section 13. Informal Action By Directors.  Unless otherwise
                      ----------------------------                   
restricted by the certificate of incorporation or these bylaws, any action
required or permitted to be taken at any meeting of the board of directors or
any committee thereof may be taken without a meeting if all members of the board
or committee, as the case may be, consent thereto in writing and the writing or
writings are filed with the minutes of the proceedings of the board or
committee.

          Section 14. Meetings By Telephone.  Unless otherwise restricted by
                      ---------------------                                 
the certificate of incorporation or these bylaws, members of the board of
directors, or any committee designated by the board of directors, may
participate in a meeting of the board of directors, or any committee thereof, by
means of conference telephone or similar communications equipment by means of
which all persons participating in the meeting can hear each other, and such
participation in a meeting in such manner shall constitute presence in person at
the meeting.

                                  ARTICLE IV.

           Activities By, And Transactions With, Interested Persons
           --------------------------------------------------------

          Section 1.  No Acquisitions Of Additional Voting Stock.  After an
                      ------------------------------------------           
Interested Person (defined below together with other capitalized terms used in
this Article IV) has become an Interested Person, that Interested Person shall
not become the beneficial owner of any additional shares of Voting Stock except
as part of (a) the transaction that results in that Person first becoming an
Interested Person, or (b) pursuant to a Business Combination entered into in
accordance with the certificate of incorporation of the Corporation.

          Section 2.  Certain Events.  After any Interested Person has become an
                      --------------                                            
Interested Person, (a) there shall be no reduction in the annual rate of
dividends paid on the Common Stock (except as necessary to reflect any
subdivision of the Common Stock) without Independent Director Approval, and (b)
there shall be an increase in such annual rate of dividends as necessary to
reflect any reclassification (including any reverse stock split),
recapitalization, reorganization or any similar transaction that has the effect
of reducing the number of shares of outstanding Common Stock, unless the failure
to increase such annual dividend rate receives Independent Director Approval.

          Section 3.  Certain Benefits.  After an Interested Person has become
                      ----------------                                        
an Interested Person, neither that Interested Person nor its Affiliates shall
receive the benefit, directly or indirectly (except proportionately as a
stockholder of the Corporation), of any loans, advances, guarantees, pledges or
other financial assistance or any tax credits or other tax advantages provided
by the Corporation, whether in anticipation of or in connection with a Business
Combination or otherwise, unless such benefit receives Independent Director
Approval.

          Section 4.  Board Decisions.  A vote by Independent Directors
                      ---------------                                  
sufficient to constitute Independent Director Approval shall be sufficient to
determine, for the purposes of this Article IV, on the basis of information
known to the board of directors, (a) the number of shares of Voting Stock
beneficially owned by any Person, (b) whether a Person is an Affiliate or
Associate of 

                                       12
<PAGE>
 
another, (c) whether a Person has an agreement, arrangement or understanding
with another as to any matter referred to in this Article IV, (d) whether the
assets subject to any Business Combination constitute a Substantial Part of the
assets of the Corporation or Subsidiary in question, or (e) any factual matter
relating to the applicability or effect of this Article IV.

          Section 5.  Board Demands.  A majority of the Independent Directors
                      -------------                                          
may demand that any Person (a "Potential Interested Person") who the majority of
the Independent Directors has reason to believe is an Interested Person or who
the majority of the Independent Directors believes holds of record Voting Stock
beneficially owned by any Interested Person supply the Corporation with complete
information as to (a) the record owner(s) of all shares beneficially owned by
that Potential Interested Person, (b) the beneficial owner(s) of all shares held
of record by that Potential Interested Person, (c) the number of, and class or
series of, shares beneficially owned by that Potential Interested Person and the
certificate number(s) of the stock certificate(s) evidencing such shares, (d)
the number of, and class or series of, shares held of record by that Potential
Interested Person and the certificate number(s) of the stock certificate(s)
evidencing such shares, and (e) any factual matter relating to the applicability
or effect of this Article IV as may be reasonably requested of that Potential
Interested Person.  Any Potential Interested Person requested to provide
information pursuant to this Article IV, Section 5 shall furnish that
information within ten days after receipt of that request.

          Section 6.  Binding Decisions.  Any determinations made by the board
                      -----------------                                       
of directors, or by the Independent Directors, as the case may be, pursuant to
this Article IV in good faith and on the basis of such information and
assistance as was then reasonably available for that purpose shall be conclusive
and binding upon the Corporation and its stockholders, including any Interested
Person.

          Section 7.  Waiver Of Provisions.  Any or all of the provisions of
                      --------------------                                  
this Article IV, and their application to any or all Interested Persons or any
or all Business Combinations, may be waived in whole or in part by Independent
Director Approval.

          Section 8.  Amendment; Repeal.  Any amendment or repeal of any
                      -----------------                                 
provision or all provisions of this Article IV, or the adoption of any provision
inconsistent with any provision or all provisions of this Article IV, shall, in
addition to any other vote or approval required by law or by these bylaws or by
the certificate of incorporation, require the affirmative vote of (a) at least
75 percent of all the directors including at least two-thirds of the Independent
Directors, or (b) (i) at least 66  percent of the outstanding shares of each
class of Voting Stock, and (ii) at least a majority, not including shares owned
by Interested Persons, of the outstanding shares of each class of Voting Stock.

          Section 9.  Definitions.  For purposes of this Article IV (and of
                      -----------                                          
other Articles where specified in these bylaws) the following terms shall have
the meanings indicated:

          (i)  AFFILIATE.  An "Affiliate" of a specified Person is a Person that
               directly, or indirectly through one or more intermediaries,
               controls, or is controlled by, 

                                       13
<PAGE>
 
               or is under common control with, the Person specified.

         (ii)  ASSOCIATE.  "Associate", when used to indicate a relationship
               with any Person, means (A) any corporation or organization (other
               than the Corporation or a Subsidiary) of which such Person is an
               officer or partner or is, directly or indirectly, the beneficial
               owner of 10 percent or more of any class of equity securities,
               (B) any trust or other estate in which such Person has a
               substantial beneficial interest or as to which such Person serves
               as trustee or in a similar fiduciary capacity, and (C) any
               relative or spouse of such Person, or any relative of such
               spouse, who has the same home as such Person or is an officer or
               director of any corporation controlling or controlled by such
               Person.

         (iii) BENEFICIAL OWNERSHIP.  "Beneficial Ownership" has the same
               meaning as in Rule 13d-3 under the Securities Exchange Act Of
               1934 (or any successor rule or statutory provision) or, if Rule
               13d-3 shall be rescinded and there shall be no successor rule or
               statutory provision thereto, pursuant to Rule 13d-3 as in effect
               on January 1, 1994.  A Person shall, in any event, also be deemed
               to be the "beneficial owner" of each of the following:

               (A)  any Voting Stock that such Person or any of its Affiliates
                    or Associates beneficially owns, directly or indirectly;

               (B)  any Voting Stock that such Person or any of its Affiliates
                    or Associates possesses (1) the right to acquire (whether
                    such right is exercisable immediately or only after the
                    passage of time), pursuant to any agreement, arrangement or
                    understanding (excluding any agreement, arrangement or
                    understanding with the Corporation to effect a Business
                    Combination) or upon the exercise of conversion rights,
                    exchange rights, warrants, or options, or otherwise, or (2)
                    sole or shared voting or investment power with respect to
                    such Voting Stock pursuant to any agreement, arrangement,
                    understanding, relationship or otherwise (excluding any
                    revocable proxies granted for a particular meeting with
                    respect to shares of which neither such Person nor any such
                    Affiliate or Associate is otherwise deemed the beneficial
                    owner); or

               (C)  any Voting Stock that is beneficially owned, directly or
                    indirectly, by any other Person with which such first
                    mentioned Person or any of its Affiliates or Associates acts
                    as a partnership, limited partnership, syndicate or other
                    group pursuant to any agreement, arrangement or
                    understanding for the purpose of acquiring, holding, voting
                    or disposing of any shares of capital stock of the
                    Corporation.

                                       14
<PAGE>
 
               No director or officer of the Corporation, nor any Associate or
               Affiliate of any such director or officer, shall, solely by
               reason of any or all of such directors and officers acting in
               their capacities as such, be deemed to beneficially own any
               Voting Stock beneficially owned by any other such director or
               officer (or any Associate or Affiliate of any such director or
               officer).  No employee stock ownership or similar plan of the
               Corporation or any Subsidiary or any trustee of such a plan, nor
               any Associate or Affiliate of any such trustee, shall, solely by
               reason of such capacity of such trustee, be deemed to
               beneficially own any Voting Stock held under any such plan.

               To compute the percentage beneficial ownership of Voting Stock of
               a Person in order to determine if such Person is an Interested
               Person, the outstanding Voting Stock shall include shares deemed
               owned by such Person through application of Section 9(iii)(B) of
               this Article IV, and any other Voting Stock that may be issuable
               by the Corporation pursuant to any agreement, or upon the
               exercise of conversion rights, warrants or options, or otherwise.
               For all other purposes, the outstanding Voting Stock shall
               include only Voting Stock then outstanding.

          (iv) BUSINESS COMBINATION.  "Business Combination" means any of the
               following:

               (A)  Merger.  Any merger or consolidation of the Corporation or
                    ------                                                    
                    any Subsidiary with or into (1) any Interested Person or any
                    Affiliate of an Interested Person or (2) any other
                    corporation, limited partnership, limited liability company
                    or other entity (regardless of whether it is itself an
                    Interested Person) if, after such merger or consolidation,
                    the surviving or resulting entity would be an Affiliate of
                    an Interested Person.

               (B)  Sale, Etc.  Any sale, lease, exchange, mortgage, pledge,
                    ----------                                              
                    transfer or other disposition (in one transaction or a
                    series of related transactions) to or with any Interested
                    Person or Affiliate of an Interested Person of any
                    Substantial Part of the assets of the Corporation or any
                    Subsidiary.

               (C)  Issuance Of Equity Securities.  The issuance or transfer by
                    -----------------------------                              
                    the Corporation or by a Subsidiary (in one transaction or a
                    series of related transactions) of any Equity Securities of
                    the Corporation or any Subsidiary to any Interested Person
                    or Affiliate of an Interested Person except for (1) the
                    exercise, exchange or conversion of securities exercisable
                    or exchangeable for or convertible into such stock that were
                    beneficially owned by that Person before it became an
                    Interested Person or (2) a dividend, distribution, exchange
                    or 

                                       15
<PAGE>
 
                    conversion of securities that does not result in an
                    increase in the proportionate share beneficially owned by
                    that Interested Person of any class or series of stock of
                    the Corporation or any Subsidiary.

               (D)  Plan Of Liquidation.  The adoption of any plan or proposal
                    -------------------                                       
                    to liquidate or dissolve the Corporation if, as of the
                    record date for the determination of stockholders entitled
                    to notice of and to vote on the plan or proposal, any Person
                    is an Interested Person.

               (E)  Reclassification.  Any reclassification of securities
                    ----------------                                     
                    (including any reverse stock split) or recapitalization of
                    the Corporation, or any reorganization, merger or
                    consolidation of the Corporation with any of its
                    Subsidiaries or any similar transaction (regardless of
                    whether the transaction is with or into or otherwise
                    involving an Interested Person) that has the effect,
                    directly or indirectly, of increasing the percentage
                    beneficially owned by any Interested Person of any class of
                    Equity Securities of the Corporation or any Subsidiary,
                    except as a result of immaterial changes due to fractional
                    share adjustments.

          (v)  CORPORATION.  The "Corporation" means Barrett Resources
               Corporation.

          (vi) EQUITY SECURITY.  "Equity Security" means any stock or similar
               security, certificate of interest or participation in any profit
               sharing agreement, preorganization certificate or subscription,
               transferable share, voting trust certificate or certificate of
               deposit for an equity security, limited partnership interest,
               interest in a joint venture, or certificate of interest in a
               business trust; or any security convertible with or without
               consideration into such a security, or carrying any warrant or
               right to subscribe to or purchase such a security; or any such
               warrant or right; or any put, call, straddle, or other option or
               privilege of buying such a security from or selling such a
               security to another without being bound to do so.

        (vii)  INDEPENDENT DIRECTOR.  "Independent Director" means any member
               of the board of directors of the Corporation who is not an
               employee of the Corporation or any Subsidiary and who is not an
               Affiliate or Associate of, and not a nominee of, either (1) an
               Interested Person who is an Interested Person with respect to a
               Business Combination that has been proposed during the two-year
               period preceding the date of the action in question, or an
               Affiliate of such Interested Person, or (2) an Interested Person
               involved in a transaction, matter, or other proposal that is the
               subject of a vote of the board of directors or a committee of the
               board of directors for which a determination of Independent
               Director status is being made, or an Affiliate of such Interested
               Person.

                                       16
<PAGE>
 
       (viii)  INDEPENDENT DIRECTOR APPROVAL. "Independent Director Approval"
               means approval by at least two-thirds of the Independent
               Directors at a time when the number of Independent Directors is
               at least equal to two-thirds of the number of Independent
               Directors immediately before the Interested Person became an
               Interested Person.

         (ix)  INTERESTED PERSON. "Interested Person" means any Person (other
               than the Corporation or any Subsidiary) who or which, as of any
               particular date, is the beneficial owner, directly or indirectly,
               of more than 15 percent of the outstanding shares of any single
               class, or of all classes in the aggregate, of Voting Stock.

          (x)  PERSON.  "Person" means any individual or entity.

         (xi)  SUBSIDIARY.  "Subsidiary" means any corporation of which a
               majority of any class of equity security is owned, directly or
               indirectly, by the Corporation, except that for the purposes of
               the definition of Interested Person the term "Subsidiary" means
               only a corporation of which a majority of each class of equity
               security is owned, directly or indirectly, by the Corporation.

        (xii)  SUBSTANTIAL PART.  "Substantial Part" means assets having a
               book value in excess of 20 percent of the book value of the total
               consolidated assets of the Corporation (or Subsidiary, if
               applicable) (determined in according with generally accepted
               accounting principles), at the end of its most recent fiscal year
               ending before the determination is made.

       (xiii)  VOTING STOCK.  "Voting Stock" means outstanding shares of
               capital stock generally entitled to vote in the election of
               directors, or, with respect to any particular matter, generally
               entitled to vote on that matter.

          Section 10.  Severability.  If any provision (or portion thereof) of
                       ------------                                           
this Article IV is found to be invalid, prohibited or unenforceable for any
reason, the remaining provisions (or portions thereof) of this Article IV shall
be deemed to remain in full force and effect and shall be construed as if such
invalid, prohibited or unenforceable provision had been stricken herefrom or
otherwise rendered inapplicable, it being the intent of the Corporation and its
stockholders that each such remaining provision (or portion thereof) of this
Article IV remain, to the fullest extent permitted by law, applicable and
enforceable as to all stockholders, including Interested Persons,
notwithstanding any such finding.

                                       17
<PAGE>
 
                                  ARTICLE V.

                              Officers And Agents
                              -------------------

          Section 1.  General.  The officers of the corporation shall be a
                      -------                                             
president, a secretary and a treasurer.  The board of directors may appoint such
other officers, assistant officers, and agents, a chairman or vice-chairmen of
the board, assistant secretaries and assistant treasurers, as they may consider
necessary, who shall be chosen in such manner and hold their offices for such
terms and have such authority and duties as from time to time may be determined
by the board of directors.  The salaries of all the officers of the corporation
shall be fixed by the board of directors.  Any number of offices may be held by
the same person with the exception of the office of president and secretary
being held simultaneously by the same person, or as otherwise provided in the
certificate of incorporation or these bylaws.

          Section 2.  Election And Term Of Office.  The officers of the
                      ---------------------------                      
corporation shall be elected by the board of directors annually at the first
meeting of the board held after each annual meeting of the stockholders.  If the
election of officers shall not be held at such meeting, such election shall be
held as soon thereafter as conveniently may be.  Each officer shall hold office
until his successor shall have been duly elected and qualified or until the
earliest to occur of his death, resignation or removal.

          Section 3.  Removal.  Any officer or agent elected or appointed by the
                      -------                                                   
board of directors may be removed at any time by the board whenever in its
judgment the best interests of the corporation will be served thereby.

          Section 4.  Vacancies.  Any officer may resign at any time upon
                      ---------                                          
written notice to the corporation.  Such resignation shall take effect at the
time stated therein; and unless otherwise specified therein, the acceptance of
such resignation shall not be necessary to make it effective.  Any vacancy
occurring in any office by death, resignation, removal or otherwise shall be
filled by the board of directors for the unexpired portion of the term.  If any
officer shall be absent or unable for any reason to perform his duties, the
board of directors, to the extent not otherwise consistent with these bylaws or
law, may direct that the duties of such officer during such absence or inability
shall be performed by such other officer or assistant officer as seems advisable
to the board.

          Section 5.  Authority And Duties Of Officers.  The officers of the
                      --------------------------------                      
corporation shall have the authority and shall exercise the powers and perform
the duties specified below, and as may be otherwise specified by the board of
directors or by these bylaws, except that in any event each officer shall
exercise such powers and perform such duties as may be required by law, and in
cases where the duties of any officer or agent are not prescribed by these
bylaws or by the board of directors, such officer or agent shall follow the
orders and instructions of (a) the president, and if a chairman of the board is
elected, then (b) the chairman of the board.

               (a)   President. The President, subject to the direction and
                     ---------
supervision of the

                                       18
<PAGE>
 
board of directors, shall have the following responsibilities: (i) be the chief
executive officer of the corporation and have general and active control of its
affairs, business and property and general supervision of its officers, agents
and employees; (ii) preside at all meetings of the stockholders; (iii) see that
all orders and resolutions of the board of directors are carried into effect;
and (iv) sign or countersign all certificates, contracts and other instruments
of the corporation, except where required or permitted by law to be otherwise
signed and executed and except where the signing and execution thereof shall be
expressly delegated by the board of directors to some other officer or agent of
the corporation. In addition, the president shall, unless otherwise directed by
the board of directors, attend in person or by substitute appointed by them, or
by written instruments appointing proxy or proxies to represent the corporation,
all meetings of the stockholders of any corporation in which the corporation
shall hold any stock and may, on behalf of the corporation, in person or by
substitute or proxy, execute written waivers of notice and consents with respect
to such meetings. At all such meetings, and otherwise, the president, in person
or by substitute or proxy as aforesaid, may vote the stock so held by the
corporation and may execute written consent and other instruments with respect
to such stock and may exercise any and all rights and powers incident to the
ownership of said stock, subject however to the instructions, if any, of the
board of directors. Subject to the directions of the board of directors, the
president shall exercise all other powers and perform all other duties normally
incident to the office of president of a corporation and shall exercise such
other powers and perform such other duties as from time to time may be assigned
to him by the board. If a chairman of the board has been elected, the chairman
of the board shall have, subject to the direction and modification of the board
of directors, all the same responsibilities, rights and obligations as described
in these bylaws for the president.

          (b)  Vice Presidents.  The vice presidents, if any shall be elected,
               ---------------                                                
and if they be so directed shall assist the president and shall perform such
duties as may be assigned to them by the president or by the board of directors.
In the absence of the president, the vice president designated by the board of
directors or (if there be no such designation) designated in writing by the
president shall have the powers and perform the duties of the president.  If no
such designation shall be made all vice presidents may exercise such powers and
perform such duties.

          (c)  Secretary.  The secretary shall perform the following functions:
               ---------                                                        
(i)  record or cause to be recorded the proceedings of the meeting of the
stockholders, the board of directors and any committees of the board of
directors in a book to be kept for that purpose; (ii) see that all notices are
duly given in accordance with the provisions of these bylaws or as required by
law; (iii)  be custodian of the corporate records and of the seal of the
corporation; (iv) keep at the corporation's registered office or principal place
of business within or outside Delaware a record containing the names and
addresses of all stockholders and the number and class of shares held by each,
unless such a record shall be kept at the office of the corporation's transfer
agent or registrar; (v) have general charge of the stock books of the
corporation, unless the corporation has a transfer agent; and (vi) in general,
perform all other duties as from time to time may be assigned to him by the
president, or by the board of directors.  Assistant secretaries, if any, shall
have the same duties and powers, subject to supervision by the secretary.

          (d)  Treasurer.  The treasurer shall perform the following functions:
               ---------                                                        
(i) be 

                                       19
<PAGE>
 
the principal financial officer of the corporation and have the care and
custody of all funds, securities, evidences of indebtedness and other personal
property of the corporation and deposit the same in accordance with the
instructions of the board of directors; (ii) receive and give receipts and
acquittances for monies paid in on account of the corporation, and pay out of
the funds on hand all bills, payrolls and other just debts of the corporation of
whatever nature upon maturity; (iii) be the principal accounting officer of the
corporation and as such prescribe and maintain the methods and systems of
accounting to be followed, keep complete books and records of account, prepare
and file all local, state and federal tax returns, prescribe and maintain an
adequate system of internal audit, and prepare and furnish to the president and
the board of directors statements of account showing the financial position of
the corporation and the results of its operations; and (iv) perform all other
duties incident to the office of treasurer and such other duties as from time to
time may be assigned to him by the president or the board of directors.
Assistant treasurers, if any, shall have the same powers and duties, subject to
the supervision of the treasurer.

          Section 6.  Surety Bonds.  The board of directors may require any
                      ------------                                         
officer or agent of the corporation to execute to the corporation a bond in such
sums and with such sureties as shall be satisfactory to the board, conditioned
upon the faithful performance of his duties and for the restoration to the
corporation of all books, papers, vouchers, money and other property of whatever
kind in his possession or under his control belonging to the corporation.

          Section 7.  Salaries.  Officers of the corporation shall be entitled
                      --------                                                
to such salaries, emoluments, compensation or reimbursement as shall be fixed or
allowed from time to time by the board of directors.

                                  ARTICLE VI.

                                     Stock
                                     -----

          Section 1.  Certificates.  Each holder of stock in the corporation
                      ------------                                          
shall be entitled to have a certificate signed in the name of the corporation by
the president or a vice-president, and by the treasurer or an assistant
treasurer, or the secretary or an assistant secretary of the corporation.  Any
of or all the signatures on the certificate may be facsimile.  In case any
officer, transfer agent or registrar who has signed or whose facsimile signature
has been placed upon a certificate shall have ceased to be such officer,
transfer agent or registrar before such certificate is issued, it may be issued
by the corporation with the same effect as if he were such officer, transfer
agent or registrar at the date of issue.  Certificates of stock shall be
consecutively numbered and shall be in such form consistent with law as shall be
prescribed by the board of directors.

          Section 2.  Record.  A record shall be kept of the name of each
                      ------                                             
person or other entity holding the stock represented by each certificate for
shares of the corporation issued, the number of shares represented by each such
certificate, the date thereof and, in the case of cancellation, the date of
cancellation.  The person or other entity in whose name shares of stock stand on
the books of the corporation shall be deemed the owner thereof, and thus a
holder of record of such shares of stock, for all purposes as regards the
corporation.

                                       20
<PAGE>
 
          Section 3.   Consideration For Shares.  Shares shall be issued for
                       ------------------------                             
such consideration (but not less than the par value thereof) as shall be
determined from time to time by the board of directors.  Treasury shares shall
be disposed of for such consideration as may be determined from time to time by
the board.  Such consideration may consist, in whole or in part, of cash,
personal property, real property, leases of real property, services rendered, or
promissory notes, and shall be paid in such form, in such manner and at such
times as the directors may require.

          Section 4.  Issuance of Stock.  The capital stock issued by the
                      -----------------                                  
corporation shall be deemed to be fully paid and nonassessable stock, if: (a)
the entire amount of the consideration has been received by the corporation in
the form or forms set forth in Section 3 of this Article VI and if any part of
the consideration is in the form of a promissory note or other obligation, such
note or obligation has been satisfied in full; or (b) not less than the amount
of the consideration determined to be capital pursuant to statute has been
received by the corporation in the form or forms set forth in Section 3 of this
Article VI and the corporation has received a binding obligation of the
subscriber or purchaser to pay the balance of the subscription or purchase
price; provided, however, nothing contained herein shall prevent the board of
directors from issuing partly paid shares as described herein.

          The corporation may issue the whole or any part of its shares as
partly paid and subject to call for the remainder of the consideration to be
paid therefor.  Upon the face or back of each stock certificate issued to
represent any such partly paid shares the total amount of the consideration to
be paid therefor and the amount paid thereon shall be stated.  Upon the
declaration of any dividend upon partly paid shares, the corporation shall
declare a dividend upon partly paid shares of the same class, but only upon the
basis of the percentage of the consideration actually paid thereon.

          The directors may from time to time demand payment, in respect of each
share of stock not fully paid, of such sum of money as the necessities of the
business may, in the judgment of the board of directors, require, not exceeding
in the whole, the balance remaining unpaid on said stock, and such sum so
demanded shall be paid to the corporation at such times and by such installments
as the directors shall direct.  The directors shall give written notice of the
time and place of such payments, which notice shall be mailed to each holder or
subscriber to his last known post office address at least thirty days before the
time for such payment for stock which is not fully paid.

          The corporation may, but shall not be required to, issue fractions of
a share.  If it does not issue fractions of a share, it shall: (a) arrange for
the disposition of fractional interests by those entitled thereto; (b) pay in
cash the fair value of fractions of a share as of the time when those entitled
to receive such fractions are determined; or (c) issue scrip or warrants in
registered or bearer form which shall entitle the holder to receive a
certificate for a full share upon the surrender of such scrip or warrants
aggregating a full share.  A certificate for a fractional share shall, but scrip
or warrants shall not unless provided therein, entitle the holder to exercise
voting rights, to receive dividends thereon, and to participate in any of the
assets of the corporation in the event of liquida-

                                       21
<PAGE>
 
tion. The board of directors may cause scrip or warrants to be issued subject to
the conditions that they shall become void if not exchanged for certificates
representing full shares before a specified date, or subject to the conditions
that the shares for which scrip or warrants are exchangeable may be sold by the
corporation and the proceeds thereof distributed to the holders of scrip or
warrants, or subject to any other conditions which the board of directors may
impose.

          The board of directors may, at any time and from time to time, if all
of the shares of capital stock which the corporation is authorized by its
certificate of incorporation to issue have not been issued, subscribed for, or
otherwise committed to be issued, issue or take subscriptions for additional
shares of its capital stock up to the amount authorized in its certificate of
incorporation.

          Section 5.  Lost Certificates.  In case of the alleged loss,
                      -----------------                               
destruction or mutilation of a certificate of stock, the board of directors may
direct the issuance of a new certificate in lieu thereof upon such terms and
conditions in conformity with law as it may prescribe.  The board of directors
may in its discretion require a bond in such form and amount and with such
surety as it may determine, before issuing a new certificate.

          Section 6.  Transfer Of Shares.  Upon surrender to the corporation or
                      ------------------                                       
to a transfer agent of the corporation of a certificate of stock duly endorsed
or accompanied by proper evidence of succession, assignment or authority to
transfer, it shall be the duty of the corporation to issue a new certificate to
the person entitled thereto, cancel the old certificate, and record the
transaction in the stock books.

          Section 7.  Registered Stockholders.  The corporation shall be
                      -----------------------                           
entitled to recognize the exclusive right of a person registered on its books as
the owner of shares to receive dividends, and to vote as such owner, and the
corporation shall be entitled to hold liable for calls and assessments a person
registered on its books as the owner of shares, and the corporation shall not be
bound to recognize any equitable or other claim to or interest in such share or
shares on the part of any other person, whether or not it shall have express or
other notice thereof except as otherwise provided by the laws of Delaware.

          Section 8.  Transfer Agents, Registrars And Paying Agents.  The board
                      ---------------------------------------------            
may at its discretion appoint one or more transfer agents, registrars and agents
for making payment upon any class of stock, bond, debenture or other security of
the corporation.  Such agents and registrars may be located either within or
outside Delaware.  They shall have such rights and duties and shall be entitled
to such compensation as may be agreed.

                                       22
<PAGE>
 
                                 ARTICLE VII.

                   Indemnification Of Officers And Directors
                   -----------------------------------------

          Section 1.  Indemnification Of Directors, Officers, And Others.  Any
                      --------------------------------------------------      
person who was or is a party or is threatened to be made a party to any
threatened, pending or completed action, suit or proceeding, whether civil,
criminal, administrative or investigative, by reason of the fact that he is or
was at any time since the inception of the corporation a director, officer or
employee of the corporation, or is or was at any time since the inception of the
corporation serving at the request of the corporation as a director, officer,
employee or agent of another corporation, partnership, joint venture, trust or
other enterprise, including serving as trustee, plan administrator or other
fiduciary of any employee benefit plan, shall be indemnified by the corporation
to the full extent permitted by the General Corporation Law of the State of
Delaware (or any similar provision or provisions of applicable law at the time
in effect).

          Section 2.  Indemnification Of Officers, Directors And Employees
                      ----------------------------------------------------
Pursuant To The Common Law Or Statutory Provisions Other Than The General
- -------------------------------------------------------------------------
Corporation Law Of The State Of Delaware.  Any person who was or is a party or
- ----------------------------------------                                      
is threatened to be made a party to any threatened, pending or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative, by
reason of the fact that he is or was at any time since the inception of the
corporation a director, officer or employee of the corporation, or is or was at
any time since the inception of the corporation serving at the request of the
corporation as a director, officer, or employee of another corporation,
partnership, joint venture, trust or other enterprise, including serving as
trustee, plan administrator or other fiduciary of any employee benefit plan,
shall be indemnified by the corporation to the full extent permitted by the
common law and by any statutory provision other than the General Corporation Law
of the State of Delaware.

          Section 3.  Mandatory Advance Of Expenses.  Reasonable expenses
                      -----------------------------                      
incurred in defending any action, suit or proceeding described in Section 1 or 2
of this Article VII shall be paid by the corporation in advance of the final
disposition of such action, suit or proceeding upon receipt of an undertaking by
or on behalf of such director, officer or employee to repay such amount to the
corporation if it shall ultimately be determined that he is not entitled to be
indemnified by the corporation as authorized in this Article VII.

          Section 4.  Payment Of Indemnified Claims.  Reasonable amounts
                      -----------------------------                     
required to be paid in settlement or as a judgment in any action, suit or
proceeding described in Section 1 or 2 of this Article VII shall be paid by the
corporation within 90 days of the receipt of an undertaking by or on behalf of
such director, officer or employee to repay such amount to the corporation if it
shall ultimately be determined that he is not entitled to be indemnified by the
corporation as authorized in this Article VII; provided however, that the
corporation shall not be required to pay such amounts if a majority of the
members of the Board of Directors vote to deny the request for indemnification
within the 90 day period set forth in this Section 4 if such amounts previously
have not been paid by the corporation in accordance with this Section 4.

                                       23
<PAGE>
 
          Section 5.  Rights Of Appeal.  In the event that the corporation
                      ----------------                                    
advances funds for indemnification pursuant to this Article VII, and,
subsequently, indemnification pursuant to this Article VII is declared
unenforceable by a court, or the corporation determines that the director,
officer or employee on whose behalf the funds were advanced is not entitled to
indemnification pursuant to this Article VII, then such director, officer or
employee shall have the right to retain the indemnification payments until all
appeals of the court's or the corporation's decision have been exhausted.

          Section 6.  Additional Indemnification.  Without limiting the
                      --------------------------                       
indemnification otherwise provided by this Article VII, any person who was or is
a party or is threatened to be made a party to any threatened, pending or
completed action, suit or proceeding, whether civil, criminal, administrative or
investigative, by reason of the fact that he is or was at any time since the
inception of the corporation a director, officer or employee of the corporation
or a wholly owned subsidiary of the corporation, or is or was at any time since
the inception of the corporation a trustee, plan administrator or other
fiduciary of any employee benefit plan of the corporation or a wholly owned
subsidiary of the corporation, shall be indemnified by the corporation against
all expenses, including attorneys' fees, judgments, fines and amounts paid in
settlement, actually and reasonably incurred by him in connection with such
action, suit or proceeding, including an action or suit by or in the right of
the corporation to procure a judgment in its favor, if he acted in good faith
and in a manner he reasonably believed to be in or not opposed to the best
interests of the corporation, and, with respect to any criminal action or
proceeding, he had no reasonable cause to believe his conduct was unlawful.  The
termination of any action, suit or proceeding by judgment, order, settlement,
conviction, or upon a plea of nolo contendere or its equivalent, shall not, of
itself, create a presumption that the person did not act in good faith and in a
manner which he reasonably believed to be in or not opposed to the best
interests of the corporation, and with respect to any criminal action or
proceeding, had reasonable cause to believe that his conduct was unlawful.

          Section 7.  Indemnification Not Exclusive.  The indemnification
                      -----------------------------                      
provided in this Article VII shall not be deemed exclusive of any other rights
to which any person seeking indemnification may be entitled under any agreement,
vote of stockholders or disinterested directors or otherwise, both as to action
in his official capacity and as to action in another capacity while holding such
office.

          Section 8.  Insurance.  By action of the board of directors,
                      ---------                                       
notwithstanding any interest of the directors in such action, the corporation
may purchase and maintain insurance, in such amounts as the board may deem
appropriate, on behalf of any person who is or was a director, officer or
employee of the corporation or is or was serving at the request of the
corporation as a director, officer, employee or agent of another corporation,
partnership, joint venture, trust or other enterprise against any liability
asserted against him and incurred by him in any such capacity, or arising out of
his status as such, whether or not the corporation would have the power to
indemnify him against such liability under applicable provisions of laws.

          Section 9.  Applicability; Effect.  Any indemnification and
                      ---------------------                          
advancement of expenses provided by or granted pursuant to this Article VII
shall be applicable to acts or omissions 

                                       24
<PAGE>
 
that occurred prior to the adoption of this Article VII, shall continue as to
any persons who ceased to be a director, officer, or employee of the corporation
or a wholly owned subsidiary of the corporation, or was serving as or has since
ceased to be a trustee, plan administrator or other fiduciary of any employee
benefit plan of the corporation or a wholly owned subsidiary of the corporation,
and shall inure to the benefit of the heirs, executors, and administrators of
such person. The repeal or amendment of this Article VII or any Section or
provision thereof which would have the effect of limiting, qualifying or
restricting any of the powers or rights of indemnification provided or permitted
in this Article VII shall not, solely by reason of such repeal or amendment,
eliminate, restrict or otherwise affect the right or power of the corporation to
indemnify any person, or affect any right of indemnification of such person,
with respect to any acts or omissions which occurred prior to such repeal or
amendment. All rights under this Article VII shall be deemed to be provided by a
contract between the corporation and each person covered hereby.

          Section 10. Savings Clause.  If this Article VII or any Section or
                      --------------                                        
provision hereof shall be invalidated by any court on any ground, then the
corporation shall nevertheless indemnify each party otherwise entitled to
indemnification hereunder to the fullest extent permitted by law or any
applicable provision of this Article VII that shall not have been invalidated.

                                 ARTICLE VIII.

                    Execution Of Instruments; Loans; Checks
                    ---------------------------------------
                      And Endorsements; Deposits; Proxies
                      -----------------------------------

          Section 1.  Execution Of Instruments.  The president or any vice
                      ------------------------                            
president shall have the power to execute and deliver on behalf of and in the
name of the corporation any instrument requiring the signature of an officer of
the corporation, except as otherwise provided in these bylaws or where the
execution and delivery thereof shall be expressly delegated by the board of
directors to some other officer or agent of the corporation.  Unless authorized
to do so by these bylaws or by the board of directors, no officer, agent or
employee shall have any power or authority to bind the corporation in any way,
to pledge its credit or to render it liable pecuniarily for any purpose or in
any amount.

          Section 2.  Loans To Directors, Officers And Employees.  The
                      ------------------------------------------      
corporation may lend money to, guarantee the obligations of and otherwise assist
directors, officers and employees of the corporation, or directors of another
corporation of which the corporation owns a majority of the voting stock, only
upon compliance with the requirements of the General Corporation Law of the
State of Delaware.

          Section 3.  Checks And Endorsements.  All checks, drafts or other
                      -----------------------                              
orders for the payment of money, obligations, notes or other evidences of
indebtedness, bills of lading, warehouse receipts, trade acceptances and other
such instruments shall be signed or endorsed by such officers or agents of the
corporation as shall from time to time be determined by resolution of the board
of directors, which resolution may provide for the use of facsimile signatures.

                                       25
<PAGE>
 
          Section 4.  Deposits.  All funds of the corporation not otherwise
                      --------                                             
employed shall be deposited from time to time to the corporation's credit in
such banks or other depositories as shall from time to time be determined by
resolution of the board of directors, which resolution may specify the officers
or agents of the corporation who shall have the power, and the manner in which
such powers shall be exercised, to make such deposits and to endorse, assign and
deliver for collection and deposit checks, drafts and other orders for the
payment of money payable to the corporation or its order.

          Section 5.  Proxies.  Unless otherwise provided by resolution adopted
                      -------                                                  
by the board of directors, the president or any vice president may from time to
time appoint one or more agents or attorneys-in-fact of the corporation, in the
name and on behalf of the corporation, to cast the votes which the corporation
may be entitled to cast as the holder of stock or other securities in any other
corporation, association or other entity any of whose stock or other securities
may be held by the corporation, at meetings of the holders of the stock or other
securities of such other corporation, association or other entity or to consent
in writing, in the name of the corporation as such other entity, and may
instruct the person or persons so appointed as to the manner of casting such
votes or giving such consent, and may execute or cause to be executed in the
name and on behalf of the corporation and under its corporate seal, or
otherwise, all such written proxies or other instruments as he may deem
necessary or proper in the premises.

                                  ARTICLE IX.

                                 Miscellaneous
                                 -------------

          Section 1.  Waivers Of Notice.  Whenever notice is required to be
                      -----------------                                    
given by law, by the certificate of incorporation or by these bylaws, a written
waiver thereof, signed by the person entitled to said notice, whether before or
after the time stated therein, shall be deemed equivalent to notice.  Attendance
of a person at a meeting or (in the case of a stockholder) by proxy shall
constitute a waiver of notice of such meeting, except when the person attends a
meeting for the express purpose of objecting, at the beginning of the meeting,
to the transaction of any business because the meeting was not lawfully called
or convened.  Neither the business to be transacted at, nor the purpose of, any
regular or special meeting of the stockholders, directors, or members of a
committee of directors need to be specified in any written waiver or notice
unless so required by the certificate of incorporation or these bylaws.

          Section 2.  Presumption Of Assent.  A director or stockholder of the
                      ---------------------                                   
corporation who is present at a meeting of the board of directors or
stockholders at which action on any corporate matter is taken shall be presumed
to have assented to the action taken unless his dissent shall be entered in the
minutes of the meeting or unless he shall file his written dissent to such
action with the person acting as the secretary of the meeting before the
adjournment thereof or shall forward such dissent by registered mail to the
secretary of the corporation immediately after the adjournment of the meeting.
Such right to dissent shall not apply to a director or stockholder who voted in
favor of such action.

                                       26
<PAGE>
 
          Section 3.  Seal.  The corporate seal of the corporation shall be
                      ----                                                 
circular in form and shall contain the name of the corporation and the words
"Seal, Delaware."  The custodian of the seal shall be the secretary, who along
with the president or other officer authorized by the board of directors, may
affix the seal to documents of the corporation.

          Section 4.  Amendments.  These bylaws may be altered, amended or
                      ----------                                          
repealed or new bylaws may be adopted by the board of directors or by the
stockholders in the manner provided in this Article IX, Section 4 at any
meeting, but not by written consent, of the stockholders.  In order for the
board of directors to effect an alteration, amendment or repeal of these bylaws
or to adopt new bylaws, written notice containing the proposed alteration,
amendment, repeal, or new bylaws must be provided to all the directors of the
corporation not less than 30 days prior to the meeting of directors at which the
proposal is to be considered unless the proposal is approved by at least 75
percent of all directors including 80 percent of Independent Directors (as
defined in Article IV, Section 9 of these bylaws together with other capitalized
terms used in Article IX of these bylaws).  In order for the stockholders to
effect an alteration, amendment, or repeal of these bylaws or to adopt new
bylaws, written notice containing the proposed alteration, amendment, repeal, or
new bylaws has been provided to the secretary and all the directors of the
corporation not more than seven days after the corporation gives notice of the
meeting of stockholders at which the proposal is to be considered.

     Any amendment or repeal of any provision or all provisions of this Article
IX, Section 4, or the adoption of any provision inconsistent with any provision
or all provisions of this Article IX, Section 4, shall, in addition to any other
vote or approval required by law or by these bylaws or by the certificate of
incorporation, require the affirmative vote of (a) at least 75 percent of all
the directors including at least two-thirds of the Independent Directors, or (b)
(i) at least 66  percent of the outstanding shares of each class of Voting
Stock, as defined in Article IV, Section 9 of these bylaws, and (ii) at least a
majority, not including shares owned by Interested Persons, of the outstanding
shares of each class of Voting Stock.

          Section 5.  Emergency Bylaws.  Subject to repeal or change by action
                      ----------------                                        
of the stockholders, the board of directors may adopt emergency bylaws in
accordance with and pursuant to the provisions of the General Corporation Law of
the State of Delaware.

                                   * * * * *

                                       27

<PAGE>
 
                                                                    Exhibit 4.1B
                                                                    ------------
                                                                                
                         Amendment to Rights Agreement
                       dated as of August 5, 1997 between
                         Barrett Resources Corporation
                              and BankBoston, N.A.


     The Rights Agreement is hereby amended as follows:

     1.   The first sentence of the Rights Agreement is amended by adding after
          the words "BankBoston, N.A." and before the parenthetical the
          following:

               , a national banking association

     2.   Section 1 is amended to delete paragraphs (l) and (m) therefrom.

     3.   Section 3(a) is amended by eliminating the first sentence thereof and
          substituting in its place the following:

          Until the earlier of (i) the Stock Acquisition Date or (ii) the tenth
          Business Day after the date of the commencement of, or first public
          announcement of the intent of any Person (other than the Company, any
          subsidiary of the Company, or any employee benefit plan of the Company
          or any of its subsidiaries or any trustee or administrator of any such
          plan in its capacity as such) to commence (which intention to commence
          remains in effect for five business days after such announcement), a
          tender or exchange offer which would result in such Person becoming an
          Acquiring Person (or such later date determined by the Board of
          Directors of the Company which date shall not be later than the date
          specified in (i)), (the earlier of such dates being herein referred to
          as the "Distribution Date"), (x) the Rights will be evidenced (subject
          to the provisions of paragraph (b) of this Section 3) by the
          certificates for Common Stock registered in the names of the holders
          of the Common Stock (which certificates for Common Stock shall be
          deemed also to be certificates for Rights) and not by separate
          certificates, and (y) the Rights (and the right to receive
          certificates therefor) will be transferable only in connection with
          the transfer of the underlying shares of Common Stock (including a
          transfer to the Company); provided, however, that if a tender or
          exchange offer is terminated prior to the occurrence of the
          Distribution Date, then no Distribution Date shall occur as a result
          of that tender or exchange offer.


     4.   Section 4(b) is amended by deleting the two references to "a
          Transaction Person" from the legend.

     5.   Section 7(e) is amended by eliminating the existing text thereof and
          substituting in its place the following:

          Notwithstanding anything in this Agreement to the contrary, from and
          after the time an Acquiring Person first becomes such, any Rights
          beneficially owned by (i) an Acquiring Person or an Affiliate or
          Associate of an 
<PAGE>
 
          Acquiring Person, (ii) a transferee of an Acquiring Person (or of any
          Affiliate or Associate thereof) who becomes a transferee after the
          Acquiring Person becomes such, or (iii) a transferee of an Acquiring
          Person (or of any Affiliate or Associate thereof) who becomes a
          transferee prior to or concurrently with the Acquiring Person becoming
          such and receives such Rights pursuant to either (A) a transfer
          (whether or not for consideration) from the Acquiring Person to
          holders of equity interests in such Acquiring Person or to any Person
          with whom the Acquiring Person has a continuing agreement, arrangement
          or understanding regarding the transferred Rights or (B) a transfer
          which the Board of Directors of the Corporation has determined is part
          of a plan, arrangement or understanding which has as a primary purpose
          or effect the avoidance of this Section 7(e), shall become null and
          void without any further action and no holder of such Rights shall
          have any rights whatsoever with respect to such Rights, whether under
          any provision of this Agreement or otherwise. The Corporation shall
          use all reasonable efforts to insure that the provisions of this
          Section 7(e) and Section 4(b) hereof are complied with, but shall have
          no liability to any holder of Right Certificates or other Person as a
          result of its failure to make any determinations with respect to an
          Acquiring Person or its Affiliates, Associates or transferees
          hereunder.

     6.   Section 13(a) is amended by replacing the language before clause (x)
          with the following:

          In the event that, on or following the Stock Acquisition Date,
          directly or indirectly,

     7.   Section 13 is further amended by deleting Section 13(d).

     8.   Section 24(a)(ii) is amended by deleting the reference to "a
          Transaction Person" therein.

     9.   Section 24(a) is further amended by deleting subsection (iii) thereof.


     10.  Section 26 is amended by changing the address for notices to
          BankBoston, N.A. to the following:

               c/o Equiserve Limited Partnership
               150 Royall Street
               Canton, MA 02021
               Attention:  Client Administration

     11.  Section 27 is amended by deleting the last sentence of the Section.

                                       2
<PAGE>
 
     12.  Exhibit C to the Rights Agreement is amended by replacing the attached
          "Exhibit C" in its place.

                         BARRETT RESOURCES CORPORATION


                         By: /s/ A. Ralph Reed
                             ---------------------------------
                             A. Ralph Reed
                             President and Chief Operating Officer

                         BANKBOSTON, N.A.


                         By: /s/ Carol Mulvey-Eori
                             ---------------------------------
                             Name:  Carol Mulvey-Eori
                             Title:    _______________________

                                       3
<PAGE>
 
                                                                       Exhibit C
                                                                       ---------

                         SUMMARY OF RIGHTS TO PURCHASE

                                PREFERRED STOCK

          On August 4, 1997, the Board of Directors of Barrett Resources
Corporation (the "Company") declared a dividend distribution of one Right for
each outstanding share of common stock, par value $.001 per share (the "Common
Stock"), of the Company to stockholders of record at the close of business on
August 20, 1997 (the "Record Date").  Except as set forth below, each Right,
when exercisable, entitles the registered holder to purchase from the Company
one one-thousandth of a share of a series of preferred stock, designated as
Series A Junior Participating Preferred Stock, par value $.01 per share (the
"Preferred Stock"), at a price of $150 per one one-thousandth of a share (the
"Purchase Price), subject to adjustment.  The description and terms of the
Rights are set forth in a Rights Agreement (the "Rights Agreement") between the
Company and BankBoston, N.A., as Rights Agent, and an amendment to the Rights
Agreement dated as of February 25, 1999 (the "Amendment").

          Until the earlier to occur of (i) a public announcement that, without
the prior consent of the Board of Directors of the Company, a person or group of
affiliated or associated persons (an "Acquiring Person") has acquired, or
obtained the right to acquire, beneficial ownership of 15% or more of the
outstanding shares of Common Stock (the "Stock Acquisition Date"), or (ii) ten
business days (or such later date as the Board may determine) following the
commencement of (or a public announcement of an intention to make) a tender
offer or exchange offer which would result in any person or group and related
persons having beneficial ownership of 15% or more of the outstanding shares of
Common Stock without the prior consent of the Board of Directors of the Company
(the earlier of such dates being called the "Distribution Date"), the Rights
will be evidenced, with respect to any of the Common Stock certificates
outstanding as of August 20, 1997, by such Common Stock certificate and no
separate Rights Certificates will be distributed.  The Rights Agreement, as
amended, provides that, until the Distribution Date, the Rights will be
transferred with and only with Common Stock certificates.  Until the
Distribution Date (or earlier redemption or expiration of the Rights), new
Common Stock certificates issued after August 20, 1997, (or as soon thereafter
as practicable) upon transfer or new issuance of the Common Stock will contain a
notation incorporating the Rights Agreement, as amended, by reference.  Until
the Distribution Date (or earlier redemption or expiration of the Rights), the
surrender for transfer of any certificates for Common Stock outstanding as of
August 20, 1997, will also constitute the transfer of the Rights associated with
the Common Stock represented by such certificate, even without such notation.
As soon as practicable following the Distribution Date, separate certificates
evidencing the Rights ("Rights Certificates") will be mailed to holders of
record of the Common Stock as of the close of business on the Distribution Date,
and the separate Rights Certificates alone will evidence the Rights.

                                       4
<PAGE>
 
          The Rights are not exercisable until the Distribution Date.  The
Rights will expire on August 4, 2007, unless earlier redeemed by the Company as
described below.

          In the event that any person becomes an Acquiring Person, each holder
of a Right generally will thereafter have the right for a 60 day period after
the later of the date of such event or the effectiveness of an appropriate
registration statement (or such other longer period set by the Board of
Directors) to receive upon exercise of the Right that number of units of one
one-thousandths of a share of Preferred Stock (or, under certain circumstances,
Common Stock or other securities) having an average market value during a
specified time period (immediately prior to the occurrence of a Person becoming
an Acquiring Person) of two times the exercise price of the Right (such right
being called the "Subscription Right").  Notwithstanding the foregoing,
following the occurrence of a Person becoming an Acquiring Person, all Rights
that are, or (under certain circumstances specified in the Rights Agreement)
were, beneficially owned by the Acquiring Person or any affiliate or associate
thereof will be null and void.

          In the event that, at any time following the Stock Acquisition Date,
the Company is acquired in a merger or other business combination transaction or
50% or more of the Company's assets or earning power are sold (in one
transaction or a series of transactions), proper provision shall be made so that
each holder of a Right (except a Right voided as set forth above) shall
thereafter have the right to receive, upon the exercise thereof at the then
current exercise price of the Right, that number of shares of common stock of
the acquiring company (or, in the event there is more than one acquiring
company, the acquiring company receiving the greatest portion of the assets or
earning power transferred) which at the time of such transaction would have a
market value of two times the exercise price of the Right (such right being
called the "Merger Right").  The holder of a Right will continue to have the
Merger Right whether or not such holder exercises the Subscription Right.

          The Purchase Price payable, the number of Rights and the number of
units of one one-thousandths of a share of Preferred Stock or shares of the
Common Stock or other securities or property issuable, upon exercise of the
Rights are subject to adjustment from time to time to prevent dilution (i) in
the event of a stock dividend on, or a subdivision, combination or
reclassification of the Preferred Stock, (ii) upon the grant to holders of the
Preferred Stock of certain rights or warrants to subscribe for Preferred Stock,
certain convertible securities or securities having the same or more favorable
rights, privileges and preferences as the Preferred Stock at less than the
current market price of the Preferred Stock or (iii) upon the distribution to
holders of the Preferred Stock of evidences of indebtedness or assets (excluding
regular quarterly cash dividends out of earnings or retained earnings and
dividends payable in Preferred Stock) or of subscription rights or warrants
(other than those referred to above).

          With certain exceptions, no adjustments in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price.  No fractions of shares will be issued and, in lieu
thereof, an adjustment

                                       5
<PAGE>
 
in cash will be made based on the market price of the Common Stock on the last
trading date prior to the date of exercise.

          The number of outstanding Rights associated with each share of Common
Stock and the voting and economic rights of each one one-thousandths of a share
of Preferred Stock issuable upon exercise of each Right are also subject to
adjustment in the event of a stock split of the Common Stock or a stock dividend
on the Common Stock payable in Common Stock or subdivisions, consolidations or
combinations of the Common Stock occurring, in any such case, prior to the
Distribution Date.

          At any time prior to the earlier to occur of (i) the close of business
on the Stock Acquisition Date or (ii) the expiration of the Rights, the Company
may redeem the Rights in whole, but not in part, at a price of $.001 per Right
(the "Redemption Price"), which redemption shall be effective upon the action of
the Board of Directors.  Additionally, following the Stock Acquisition Date and
the expiration of the period during which the Subscription Right is exercisable,
the Board of Directors may redeem the then outstanding Rights in whole, but not
in part, at the Redemption Price provided that such redemption is in connection
with a merger or other business combination transaction or series of
transactions involving the Company in which all holders of Common Stock are
treated alike but not involving an Acquiring Person (or any person who was an
Acquiring Person) or it affiliates or associates.  Upon the effective date of
the redemption of the Rights, the right to exercise the Rights will terminate
and the only right of the holders of Rights will be to receive the Redemption
Price.

          The Preferred Stock purchasable upon exercise of the Rights will be
nonredeemable and junior to any other series of preferred stock the Company may
issue (unless otherwise provided in the terms of such stock).  Each share of
Preferred Stock will have a preferential quarterly dividend in an amount equal
to the greater of $10.00 and 1,000 times the dividend declared on each Common
Share.  In the event of liquidation, the holders of Preferred Stock will receive
a preferred liquidation payment equal to the greater of $5,000 and 1,000 times
the payment made per Common Share.  Each share of Preferred Stock will have one
vote, voting together with the Common Shares.  In the event of any merger,
consolidation or other transaction in which Common Shares are exchanged, each
share of Preferred Stock will be entitled to receive 1,000 times the amount and
type of consideration received per Common Share.  The rights of the Preferred
Stock as to dividends, liquidation and voting, and in the event of mergers and
consolidations, are protected by customary anti-dilution provisions.  Fractional
shares of Preferred Stock in integral multiples of one one-thousandth of a share
of Preferred Stock will be issuable; however, the Company may elect to
distribute depositary receipts in lieu of such fractional shares.  In lieu of
fractional shares other than fractions that are multiples of one one-thousandth
of a share, an adjustment in cash will be made based on the market price of the
Preferred Stock on the last trading date prior to the date of exercise.

                                       6
<PAGE>
 
          Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.

          Except as set forth above, the terms of the Rights may be amended by
the Board of Directors of the Company, (i) prior to the Distribution Date in any
manner, and (ii) on or after the Distribution Date to cure any ambiguity, to
correct or supplement any provision of the Rights Agreement which may be
defective or inconsistent with any other provisions, or in any manner not
adversely affecting the interests of the holders of the Rights.

          Copies of the Rights Agreement and the Amendment have been filed with
the Securities and Exchange Commission as an Exhibit to a Registration Statement
on Form 8-A and a Form 8-A/A.  A copy of the Rights Agreement and the Amendment
is available free of charge from the Company.  This summary description of the
Rights does not purport to be complete and is qualified in its entirety by
reference to the Rights Agreement and the Amendment, which are incorporated
herein by reference.

                                       7

<PAGE>
 
                                 Exhibit 10.8B

                                AMENDMENT NO. 1

     WHEREAS, Barrett Resources Corporation (the "Corporation") and William J.
Barrett have executed a Severance Protection Agreement dated February 6, 1998
(the "Agreement");

     WHEREAS, at that time of the execution of the Agreement it was assumed that
Mr. Barrett would retire on January 31, 1999;

     WHEREAS, at the request of the Board of Directors, Mr. Barrett has agreed
to remain as an employee of the Corporation through March 31, 2000; and

     WHEREAS, in light of the foregoing the parties desire to extend the term of
the Agreement.

     NOW, THEREFORE, the Corporation and Mr. Barrett agree as follows:

     1.  Paragraph 1 of the Agreement is hereby amended by deleting January 31,
1999" and substituting "March 31, 2000".

     2.  This amendment shall be effective November 19, 1998.


ATTEST:                                 BARRETT RESOURCES CORPORATION



/s/ Eugene A. Lang, Jr.                 BY:  /s/ A. Ralph Reed
Secretary                                    A. Ralph Reed
                                             President and Chief 
                                             Operating Officer



                                        WILLIAM J. BARRETT
        

 
                                             /s/ William J. Barrett

<PAGE>
 
                                 Exhibit 10.9B


Schedule Identifying Material Differences Among Severance Protection Agreements
               Between Barrett Resources Corporation And Each Of
       A.  Ralph Reed, J. Frank Keller, Peter A. Dea, And Bryan Hassler



<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------
        Name                    Position             Continued Benefits            Lump Sum Cash
                                                           Period                     Payment
- ---------------------------------------------------------------------------------------------------------
<S>                   <C>                            <C>                  <C>
A. Ralph Reed         President, Chief Operating     Three years          Three times annual compensation
                      Officer and Director
- ---------------------------------------------------------------------------------------------------------
J. Frank Keller       Executive Vice President,      Three years          Three times annual compensation
                      Chief Financial Officer, and
                      Director
- ---------------------------------------------------------------------------------------------------------
Peter A. Dea          Senior Vice President          Two years            Two times annual compensation
                      Exploration
- ---------------------------------------------------------------------------------------------------------
Bryan Hassler         Vice President - Marketing     Two years            Two times annual compensation
- ---------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>
 
                                  Exhibit 21

                         BARRETT RESOURCES CORPORATION
                         Subsidiaries of the Registrant

<TABLE>
<CAPTION>

Name of Company                                     State of Incorporation
- ---------------                                     ----------------------
<S>                                                 <C>
Advantage Resources International, Inc.  Peru........       Colorado
Alarado Corporation..................................       Delaware
Alarado (Denver) Company.............................       Colorado
Bargath, Inc.........................................       Colorado
Barrett 1997 Trust (a business trust)................       Delaware
Barrett Fuels Corporation............................       Delaware
Barrett Piceance LLC (a limited liability company)...       Colorado
Barrett Resources International Corporation..........       Delaware
Barrett Resources (PAC I) Corporation................       Kansas
Barrett Resources (PAC II) Corporation...............       Kansas
Barrett Resources (Peru) Corporation.................       Delaware
BGP, Inc.............................................       Delaware
Grand Valley Gathering System (joint venture)........       Colorado
Plains Petroleum Company.............................       Delaware
Plains Petroleum Gathering Company...................       Delaware
Plains Petroleum Operating Company...................       Delaware
</TABLE>

All of the subsidiaries named above are included in the consolidated financial
statements of the Registrant included herein.

<PAGE>
 
                                  Exhibit 23.1

                     CONSENT OF INDEPENDENT PUBLIC ACCOUNTS


     As independent public accountants, we hereby consent to the incorporation
by reference of our report included in this Form 10-K into Barrett Resources
Corporation's previously filed Registration Statements on Form S-3, File Nos.
333-51985 and 333-51461 and on Form S-8, File Nos. 333-29669, 333-29577 and 333-
02529.

                                        ARTHUR ANDERSEN LLP

Denver, Colorado
March 17, 1999

<PAGE>
 
                                  Exhibit 23.2

           CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND CONSULTANTS


     As independent petroleum consultants, we hereby consent to the
incorporation by reference of our report included in this Form 10-K into Barrett
Resources Corporation's previously filed Registration Statements on Form S-3,
File Nos. 333-51985 and 333-51461 and on Form S-8, File Nos. 333-29669, 333-
29577 and 333-02529.

                                        RYDER SCOTT COMPANY
                                        PETROLEUM ENGINEERS

<PAGE>
 
                                  Exhibit 23.3

           CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND CONSULTANTS


     We hereby consent to the reference to our firm in the Form 10-K of Barrett
Resources Corporation (the "Company") for the years ended December 31, 1998 and
1997, and the incorporation by reference thereof of our reserve review letter
reports into the Company's previously filed Registration Statements on Form S-3
(File Nos. 333-51985 and 333-51461) and on Form S-8 (File Nos. 333-29669, 333-
02529 and 333-29577).

                                NETHERLAND, SEWELL & ASSOCIATES, INC.
 

Dallas, Texas
March 15, 1999

<TABLE> <S> <C>

<PAGE>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                          14,339
<SECURITIES>                                         0
<RECEIVABLES>                                  785,798
<ALLOWANCES>                                   658,000
<INVENTORY>                                      8,968
<CURRENT-ASSETS>                               153,158
<PP&E>                                       1,217,655
<DEPRECIATION>                                 535,487
<TOTAL-ASSETS>                                 838,879
<CURRENT-LIABILITIES>                          158,266
<BONDS>                                        334,067
                              320
                                          0
<COMMON>                                             0
<OTHER-SE>                                     332,932
<TOTAL-LIABILITY-AND-EQUITY>                   838,879
<SALES>                                        618,483
<TOTAL-REVENUES>                               625,399
<CGS>                                          727,094
<TOTAL-COSTS>                                  727,094
<OTHER-EXPENSES>                                26,958
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              20,858
<INCOME-PRETAX>                              (149,511)
<INCOME-TAX>                                  (55,768)
<INCOME-CONTINUING>                             93,743
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (93,743)
<EPS-PRIMARY>                                   (2.95)
<EPS-DILUTED>                                   (2.95)
        

</TABLE>


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