BASIN EXPLORATION INC
10-K, 1999-03-30
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>

                       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 the fiscal year ended December 31, 1998.

[ ]    Transition Report Pursuant to Section 13 or 15(d) of the Securities 
       Exchange Act of 1934

                         Commission File Number 0-20125

                             BASIN EXPLORATION, INC.
             (Exact name of registrant as specified in its charter)

          Delaware                                      84-1143307
  (State or other jurisdiction                (IRS Employer Identification No.)
of incorporation or organization)


           370 Seventeenth Street, Suite 3400, Denver, Colorado 80202
               (Address of principal executive offices) (Zip Code)

                                 (303) 685-8000
              (Registrant's telephone number, including area code)

                    Securities registered pursuant to Section
                               12(b) of the Act:
                                      None
           Securities registered pursuant to Section 12(g) of the Act:
                          Common Stock, $.01 par value
                          ----------------------------
                                (Title of Class)

   Indicate by check mark if disclosure of delinquent filers pursuant to Item 
405 of Regulation S-K is not contained herein, and will not be contained, 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. [ ]

  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.

                                 [X] Yes [ ] No

   As of March 25, 1999, the aggregate market value of the approximate 
10,747,700 shares of voting stock held by non-affiliates of the registrant 
was approximately $139,720,000 based upon the closing sale price of the 
Common Stock on the Nasdaq Stock Market on March 25, 1999 of $13.00 per share.

   As of March 25 1999, the registrant had 13,977,000 shares of Common Stock 
outstanding.

                        DOCUMENT INCORPORATED BY REFERENCE

   Parts of the following document are incorporated by reference to Part III 
of this Form 10-K Report: Proxy Statement for the registrant's 1999 Annual 
Meeting of Shareholders.

<PAGE>

                              CROSS-REFERENCE SHEET

<TABLE>
<CAPTION>
PART I                                                                 INTERNAL PAGE
<S>                                                                    <C>
     Item 1.  Business                                                       1
     Item 2.  Properties                                                    12
     Item 3.  Legal Proceedings                                             16
     Item 4.  Submission of Matters to a Vote of Security Holders           16

PART II
     Item 5.  Market for the Registrant's Common Stock and                  16
                Related Shareholder Matters
     Item 6.  Selected Financial Data                                       17
     Item 7.  Management's Discussion and Analysis of                       17
              Financial Condition and Results of Operations
     Item 7A. Quantitative and Qualitative Disclosures
              About Market Risk                                             29
     Item 8.  Financial Statements and Supplementary Data                   29
     Item 9.  Changes and Disagreements with Accountants                    29
                on Accounting and Financial Disclosure

PART III

     Item 10. Directors and Executive Officers of the Registrant            29
     Item 11. Executive Compensation                                        29
     Item 12. Security Ownership of Certain                                 29
              Beneficial Owners and Management
     Item 13. Certain Relationships and Related Transactions                29
     Item 14. Exhibits, Financial Statement Schedules                       32
              and Reports on Form 8-K

</TABLE>

                For Certain Definitions of terms used herein, see page 30.

<PAGE>

CAUTIONARY STATEMENTS REGARDING FORWARD-LOOKING STATEMENTS

           This Annual Report on Form 10-K, including information 
incorporated by reference herein, contains statements that are not historical 
facts but are forward-looking statements that involve risks and uncertainties 
that could cause actual results to differ from projected results. Such 
statements address activities, events or developments that the Company 
expects, believes, projects, intends, estimates, plans or anticipates will, 
should, could or may occur, including such matters as:

           -    amount and nature of capital expenditures,
           -    drilling of wells,
           -    estimated reserves,
           -    timing and amount of future production of oil and gas,
           -    business strategies,
           -    operating costs and other expenses,
           -    cash flow and anticipated liquidity,
           -    prospect development and property acquisitions,
           -    marketing of oil and gas, and
           -    Year 2000 compliance activities.

           Although the Company believes that the expectations reflected in 
the forward-looking statements are reasonable, we cannot assure you that any 
of these expectations will prove correct or that we will take any actions 
that may have been planned. Factors that could cause actual results to differ 
materially ("Cautionary Disclosures") are described in the Marketing, 
Competition, Regulation and Risk Factors portions of the "Business" section 
of this report and under the "Management's Discussion and Analysis of 
Financial Condition and Results of Operations" section of this report. 
Without limiting the Cautionary Disclosures so described, Cautionary 
Disclosures include, among others:

           -    general economic conditions,
           -    oil and gas price volatility,
           -    the Company's ability to find, acquire, market, develop and 
                produce new properties, 
           -    the risks associated with acquisitions, 
           -    the risks associated with exploration, 
           -    operating hazards attendant to the oil and gas business, 
           -    downhole drilling and completion risks that are generally not 
                recoverable from third parties or insurance, 
           -    uncertainties in the estimation of proved reserves and in the
                projection of future rates of production and timing of
                development expenditures,
           -    potential mechanical failure or underperformance of individually
                significant productive wells,
           -    the strength and financial resources of the Company's 
                competitors,
           -    the Company's ability to find and  retain skilled personnel,
           -    climatic conditions,
           -    availability of capital,
           -    availability and cost of material and equipment,
           -    delays in anticipated start-up dates,
           -    environmental risks,
           -    actions or inactions of third-party operators of the Company's 
                properties,
           -    regulatory developments, and
           -    third-party Year 2000 compliance actions.

All written and oral forward-looking statements attributable to the Company 
or persons acting on its behalf are qualified in their entirety by the 
Cautionary Disclosures. The Company disclaims any obligation to update or 
revise any forward-looking statement in light of actual results or future 
events.

<PAGE>
                                    PART I

ITEM 1.  BUSINESS.

GENERAL

           Basin Exploration, Inc. ("Basin" or the "Company") is engaged in 
the exploration, acquisition, development and exploitation of oil and gas 
properties. The Company's properties are located primarily offshore Louisiana 
and Texas in the shallow waters of the Gulf of Mexico and in the Powder River 
and Green River Basins of Wyoming. As of December 31, 1998, the Company's 
estimated net proved reserves were 127.5 Bcf of natural gas and 8.7 MMBbl of 
oil, or 179.5 Bcfe, with an aggregate pre-tax present value of future net 
revenues of $164.5 million, using 1998 year-end prices held constant and a 
10% discount rate.

           In 1996, the Company changed its primary focus from the Rocky 
Mountain region to the shallow waters of the Gulf of Mexico. To implement 
this change in focus, between late-1995 and mid-1996 the Company added senior 
management and technical personnel, including geoscientists and petroleum 
engineers with extensive experience in the Gulf of Mexico, and strengthened 
its balance sheet by selling its D-J Basin properties in Colorado for $123.5 
million. The Company's divestment of its D-J Basin assets and its commitment 
to Gulf of Mexico exploration significantly changed the character and risk 
profile of its investment activities.

           Since commencing operations in the Gulf of Mexico in 1996, through 
the end of 1998, the Company has participated in drilling 31 Gulf of Mexico 
wells, including 20 that found apparent commercial hydrocarbons. The Company 
has operated 22 of the 31 wells in which it has participated and has retained 
working interests averaging approximately 54% at the time of drilling. As of 
year-end 1998, the Company had assembled a Gulf of Mexico leasehold position 
totaling 218,718 gross acres, or 149,430 net acres, with more than 40 
identified exploration prospects supported by the Company's interpretations 
of three-dimensional ("3-D") seismic data. See "PROPERTIES - Present 
Activities" for information about certain developments subsequent to December 
31, 1998.

           During 1998, the Company invested $106.7 million in oil and gas 
properties, of which approximately 96% related to activities in the Gulf of 
Mexico. Expenditures related to the Gulf of Mexico were primarily for 
drilling 17 exploratory wells, 11 of which found apparent commercial 
hydrocarbons, completion and development activities related to these 
discoveries and discoveries made in the prior year, and for acquisitions of 
seismic data and exploratory leaseholds. Other investments made in 1998 were 
primarily for exploitation and development of the Company's Rocky Mountain 
oil and gas properties, and for exploration activities in the Rocky Mountain 
area. Capital expenditures in 1998, and in 1997 when oil and gas investments 
totaled $105.6 million, were significantly greater than in prior years and 
resulted in a 133% increase in estimated proved oil and gas reserve 
quantities over the two-year period and a substantial increase in undeveloped 
Gulf of Mexico leaseholds. As a result of the large portion of such capital 
expenditures that related to Gulf of Mexico activities, Gulf of Mexico assets 
accounted for 75% of the Company's proved reserves at the end of 1998, 
compared to 9% at the beginning of 1997, and properties in the Gulf of Mexico 
contributed 86% of fourth quarter 1998 average daily net production of 65.9 
MMcfe, versus 0% of the Company's average daily net production of 11.2 MMcfe 
as recently as the second quarter of 1997. Since initiating its Gulf of 
Mexico production from a single property in August 1997, the Company had 
expanded its production base in the area to 14 properties by the end of 1998. 
Four additional properties with proved reserves were under development for 
initial production at that date.

           The Company's capital expenditures in 1998 were funded primarily 
with cash flow from operations, which totaled $33.7 million before changes in 
working capital, and bank debt, which increased from $11 million at the 
beginning of 1998 to $80 million at the close of the year.

           During 1998 the Company produced a total of 22.0 Bcfe, or 60.2 
MMcfe per day, compared to 1997 production of 8.7 Bcfe, or 23.7 MMcfe per 
day. This 154% increase in production combined with a 22% decline in 
weighted-average prices received to generate a 99% increase in revenues. The 
revenue increase resulted in a 120% increase in cash flow from operations 
before changes in working capital, from $15.3 million in 1997 to $33.7 
million in 1998. The Company's production in 1998 was comprised of 80% 
natural gas and 20% oil.

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<PAGE>

           The increase in production from 1997 to 1998 was principally 
attributable to reserves additions made in 1997. The Company did not make any 
significant acquisitions of producing properties in 1998 and wells drilled 
during 1998 did not account for a substantial portion of production during 
the year, due to a typical time lag of several months between drilling a 
discovery in the Gulf of Mexico and first production.

           Reflecting low oil and gas prices at the end of 1998, Basin 
recorded a $30.8 million after-tax, non-cash charge to reduce the carrying 
value of its oil and gas properties. As a result, the Company reported a net 
loss for the year of $28.5 million. Without the non-recurring charge, the 
Company would have reported net income for the year of $2.3 million.

           See "Management's Discussion and Analysis of Financial Condition 
and Results of Operations" for additional discussion regarding the Company's 
history, current business activities and financial performance.

BUSINESS STRATEGY

           Basin's goals are to generate per-share growth in reserves, 
production, earnings and cash flow through exploration, acquisition and 
development of oil and gas properties. The Company seeks to implement these 
goals through the following strategies:

           EXPLORE IN THE SHALLOW WATERS OF THE GULF OF MEXICO. Basin's 
exploration activities are currently focused primarily in the shallow waters 
on the Outer Continental Shelf ("OCS") of the Gulf of Mexico. The Company 
believes that this region has significant remaining undiscovered reserves and 
that the combination of substantial existing infrastructure and the 
effectiveness of 3-D seismic data will reduce exploration risk and enhance 
project economics.

           CAPITALIZE ON TECHNICAL EXPERTISE. Basin has assembled a team of 
geoscientists and petroleum engineers with substantial experience and 
expertise relating to operations in the Gulf of Mexico to generate prospects 
and evaluate acquisition opportunities in that region. Basin has also added 
senior management and technical personnel with substantial operating 
experience outside of the Gulf of Mexico and intends to utilize this in-house 
capability in conjunction with consultants to identify and evaluate growth 
opportunities in selected onshore areas, and to pursue such opportunities 
through acquisitions of properties or through exploration ventures.

           UTILIZE ADVANCED TECHNOLOGY. Basin makes extensive use of advanced 
technologies, including 3-D seismic and computer-aided exploration and 
exploitation ("CAEX") performed on eight Landmark workstations, to better 
define drilling prospects and exploitation opportunities. Basin has licensed 
more than 375,000 miles of conventional 2-D seismic data and approximately 
600 lease blocks of 3-D seismic data covering portions of the Gulf of Mexico.

           BALANCE SIZE AND RISK PROFILE OF EXPLORATION TARGETS. Basin seeks 
to conduct a drilling program that is balanced between large-target 
exploration prospects relative to the Company's existing reserve base and 
lower-risk, smaller exploration prospects, generally near existing 
infrastructure, which reduces development costs and expedites commencement of 
production. This balance is intended to mitigate risk while still gaining 
exposure to meaningful growth in reserves and production.

           GENERATE PROSPECTS INTERNALLY. Basin's team of geoscientists 
internally generates prospects using the Company's technical data bases and 
workstations. The Company believes that internally generating prospects will 
enable it to retain large working interests and operating control and to 
either bring in partners on a promoted basis or swap for interests in 
third-party generated prospects. Although the Company primarily relies on 
internal generating activities for prospect leads, the Company also evaluates 
outside-generated opportunities. Several outside-generated prospects have 
been obtained in conjunction with the originating party's participation in 
prospects generated by the Company. Basin focuses its current prospect 
generating activities primarily offshore Louisiana in the near-shore Miocene 
trends, integrating subsurface geology with a regional grid of 3-D seismic 
data. The Miocene trend is characterized by geologic structures with 
favorable reservoir parameters and conditions where subtle hydrocarbon 
indicators are sometimes apparent.

           OPERATE CORE PROPERTIES. At December 31, 1998, Basin served as 
operator for properties accounting for more than 65% of the Company's proved 
reserve quantities. Serving as operator allows the Company to exert greater 
control 

                                       2

<PAGE>

over the cost, timing and character of its exploration, development 
and production activities. Although the Company favors acting as operator, it 
does participate in outside-operated projects that it deems attractive.

           PURSUE SELECTIVE ACQUISITIONS. Basin actively seeks to acquire 
interests in proved oil and gas properties with exploration, exploitation or 
development potential to augment operations in its core areas and to 
establish positions in new areas. Generally, the Company focuses on 
acquisition opportunities where it believes it can enhance the value of the 
acquired assets through one or more of the following means: (i) exploratory 
drilling; (ii) development drilling; (iii) workovers; (iv) recompletions; (v) 
fracture stimulation; (vi) secondary recovery operations; and (vii) cost 
reductions.

            MAINTAIN FINANCIAL FLEXIBILITY. Basin seeks to maintain financial 
flexibility in order to be able to take advantage of identified investment 
opportunities. Since the Company anticipates that its capital expenditures 
are likely to exceed cash flow from operations in the foreseeable future, 
periodic sales of assets or securities may be required, in addition to 
utilization of bank debt, in order to provide funds for such investments. At 
times, preservation or restoration of financial flexibility may be dependent 
on such sales of assets or securities.

MARKETING

           The Company's gas and natural gas liquids from Gulf of Mexico 
properties are sold under short-term contracts at market prices to various 
gas purchasers. These sales may involve delivery of gas to onshore points 
under the Company's firm and interruptible transportation agreements or sales 
at the wellhead. Oil from the Company's Gulf of Mexico properties is sold 
under short-term contracts at market prices. The Company enters into liquids 
transportation and separation agreements to deliver its crude oil and 
condensate onshore.

           Because of the well-developed transportation infrastructure and 
the relatively large number of active oil and gas purchasers in the Gulf 
Coast area, including in the Gulf of Mexico where the Company conducts 
exploration and acquisition activities, the Company does not anticipate that 
it will have difficulty in marketing its production in this region at 
prevailing spot market prices.

           The majority of the Company's gas and natural gas liquids from 
fields in the Rocky Mountain region are sold under marketing arrangements 
where prices received are responsive to changes in regional spot markets. 
These include short-term contracts under which gas is delivered and sold into 
interstate pipelines at market-sensitive prices, and long-term (often for the 
life of the lease) percentage-of-proceeds contracts with gas processors.

           KN Gas Gathering ("KNGG") purchases virtually all of the Company's 
Powder River Basin gas and natural gas liquids from the Company's operated 
wells at netback prices similar to other percentage-of-proceeds contracts in 
the area. The KNGG contract does not have minimum take provisions and thus 
the Company's realization of proceeds depends on KNGG's ability to find a 
market for the Company's gas and natural gas liquids. If KNGG were to cease 
purchasing the Company's gas, the Company believes that it could sell its gas 
and natural gas liquids to other purchasers and processors in the area, 
although such sales would require capital expenditures for gathering system 
modification and might not be on terms as favorable as those characterizing 
the KNGG sales. The Company does not believe that the loss of KNGG as a 
purchaser would have a material adverse effect on the Company.

           Oil from the Company's Rocky Mountain properties is generally sold 
under term contracts that yield a premium over local posted prices.

           Demand for natural gas is highly seasonal, with demand generally 
higher in the colder winter months and in hot summer months. As a result, the 
price received for spot market natural gas may vary significantly between 
seasonal periods. To date, the Company generally has been able to sell its 
available spot market natural gas at prevailing spot market prices, and the 
volumes sold have not materially fluctuated seasonally. There is no 
assurance, however, that the Company will be able to continue to achieve this 
result.

           For much of the past decade, the markets for oil and natural gas 
have been volatile. The Company anticipates that such markets will continue 
to be volatile in the foreseeable future. Oil and gas price fluctuations have 
a significant impact on the Company's business since virtually all of the 
Company's operating revenues are ordinarily derived from sales of its oil and 
gas production. The Company believes that the loss of one or more of its 
current oil or natural gas spot purchasers would not have a material adverse 
effect on the Company's business because any individual purchaser should be 
readily replaceable by another purchaser who could be expected to pay 
approximately the same sales price.

                                       3

<PAGE>

           Basin periodically enters into oil and gas price hedging 
agreements as conditions are deemed to warrant. Such transactions affecting 
the three year period ended December 31, 1998, or currently in effect with 
respect to subsequent periods, are described below under "Management's 
Discussion and Analysis of Financial Condition and Results Of Operations - 
Liquidity and Capital Resources" and in the Notes to Consolidated Financial 
Statements.

COMPETITION

           Competition in the oil and gas industry is intense, particularly 
with respect to the acquisition of producing properties and proved 
undeveloped acreage and the acquisition of interests in offshore exploration 
prospects in the Gulf of Mexico. Major and independent oil and gas companies, 
as well as individuals and drilling programs, actively bid for desirable oil 
and gas properties, as well as for the equipment and labor required to 
operate and develop such properties. A number of Basin's competitors have 
financial resources and exploration and development budgets that are 
substantially greater than those of Basin, which may adversely affect the 
Company's ability to compete successfully. In addition, many of the Company's 
larger competitors may be better able to respond to factors that affect the 
demand for oil and natural gas production such as changes in worldwide oil 
and natural gas prices and levels of production, the cost and availability of 
alternative fuels, and the application of government regulations. The Company 
commenced operations in the Gulf of Mexico area during 1996, where it had not 
previously been active. Competition from major and large independent oil and 
gas companies is significantly greater in this area than in the Rocky 
Mountain region, where the Company had conducted all of its previous 
operations.

RISK FACTORS

           In addition to the other information set forth elsewhere in this 
Form 10-K, you should carefully consider the following factors relating to 
Basin when evaluating the Company.

OIL AND GAS PRICES, AND HEDGING - OIL AND GAS PRICES ARE CURRENTLY LOW AND 
DEPEND ON FACTORS OUT OF OUR CONTROL. LOW PRICES COULD HAVE A MATERIAL 
ADVERSE IMPACT ON OUR BUSINESS. WE MAY HEDGE SOME OF OUR PRODUCTION TO REDUCE 
PRICE RISK, BUT THAT MAY ALSO REDUCE OUR GAIN FROM PRICE INCREASES.           

           Prices for oil and natural gas fluctuate widely and have declined 
significantly over the past year. The weighted average market prices being 
received by Basin for natural gas decreased from approximately $2.32 per Mcf 
at December 31, 1997 to $1.99 per Mcf at December 31, 1998. During the same 
twelve-month period, average crude oil prices received by Basin decreased 
from $16.34 per barrel to $10.31 per barrel.

           Natural gas prices affect Basin more than oil prices, because most 
of our production and reserves are natural gas. At December 31, 1998, 71% of 
our estimated proved reserves consisted of natural gas on an Mcfe basis, and 
in 1998 approximately 80% of our total production consisted of natural gas.

           Basin's revenues, profitability and future rate of growth 
substantially depend on prevailing prices for oil, gas and natural gas 
liquids. Prices also affect the amount of cash flow available for capital 
expenditures and our ability to borrow money or raise additional capital. The 
amount we can borrow from banks is subject to re-determination based on 
changing expectations of future prices. Lower prices may also reduce the 
amount of oil and natural gas that Basin can produce economically. As an 
example, our estimated proved reserves at December 31, 1998 were lower than 
they would have been had prices not declined from year-end 1997.

           We cannot predict future oil and natural gas prices and prices may 
decline further. Among the factors that can cause this fluctuation are:

           - relatively minor changes in the supply of and demand for oil and 
             natural gas;

           - market uncertainty;

           - the level of consumer product demand;

           - weather;

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<PAGE>

           - domestic and foreign governmental regulations;

           - the price and availability of alternative fuels;

           - political conditions in the Middle East;

           - the foreign supply of oil and natural gas;

           - the price of oil and gas imports; and

           - economic conditions in the United States and in other countries.

           We periodically enter into energy price swap agreements and other 
financial arrangements to attempt to mitigate the effects of oil and natural 
gas price fluctuations. See Item 7, "Management's Discussion and Analysis of 
Financial Condition and Results of Operations," and Note 1 of Notes to 
Consolidated Financial Statements for a description of our recent hedging 
activity. Such arrangements are subject to a number of risks. If our reserves 
are not produced at the rates we estimated, we would be required to satisfy 
our obligations under hedging contracts on potentially unfavorable terms 
without the ability to offset the financial impact through sales of 
comparable quantities of our own production. Further, the terms of our 
hedging contracts are based on many assumptions and estimates such as costs 
of transportation to delivery points. Under financial instrument contracts, 
we may be at risk for basis differential, which is the difference in the 
quoted financial price for contract settlement and the actual price received 
at the physical point of delivery. Substantial variations between our 
assumptions and estimates and actual results could materially adversely 
affect our anticipated profit margins and our ability to manage price risk. 
In addition, hedging contracts are subject to the risk that the other party 
may prove unable or unwilling to perform its obligations. Any significant 
nonperformance could have a material adverse financial effect on us. 
Furthermore, hedging contracts limit the benefits we would realize if actual 
prices rise above the contract prices.

REPLACEMENT  OF  RESERVES - WE MAY NOT BE ABLE TO REPLACE  RESERVES  AND THE  
FAILURE TO DO SO WOULD  ADVERSELY  AFFECT THE  COMPANY'S LIQUIDITY AND 
OPERATIONS.

           Unless Basin conducts successful development, exploitation or 
exploration activities or acquires properties containing proved reserves, the 
proved reserves of Basin will decline as reserves are produced. Decline rates 
depend on a number of factors, including drilling density, completion 
procedures, and reservoir characteristics. They vary from generally steep 
declines of production from reservoirs in the Gulf of Mexico, where Basin has 
most of its production, to relatively slow declines of long-lived fields in 
the Rocky Mountain region, where our other properties are located. The market 
for acquiring proved reserves is extremely competitive, and we may not be 
able to buy reserves for development and exploitation at reasonable prices. 
Basin's drilling operations may be unsuccessful or may be curtailed, delayed 
or canceled for many reasons, such as title problems, weather conditions, 
compliance with governmental requirements, cost overruns, shortages of 
capital, mechanical difficulties, and shortages in drilling rigs or other 
equipment. We may be unable to make the necessary capital investments to 
maintain or expand our oil and gas reserves if cash flow from operations is 
reduced and external sources of capital become limited or unavailable. 
Because of low oil and gas prices, we have reduced our projected capital 
expenditure budget from the level of the past two years. This may result in 
drilling fewer wells and could reduce our reserves growth below that of prior 
years. We cannot assure you that our future acquisition, development, 
exploitation and exploration activities will result in reserves added at 
acceptable costs.

ACQUISITION RISKS - ACQUIRED PROPERTIES MAY NOT PERFORM AS WE PROJECTED, AND 
WE MAY NOT BE ABLE TO DISCOVER LIABILITIES CARRIED WITH THE PROPERTIES OR 
OBTAIN PROTECTION FROM SELLERS AGAINST THEM. SUBSTANTIAL ACQUISITIONS COULD 
REQUIRE SIGNIFICANT CAPITAL INFUSIONS AND COULD CHANGE BASIN'S RISK AND 
PROPERTY PROFILE.

           Our recent growth is due in part to acquisitions of producing 
properties. The successful acquisition of producing properties requires 
assessments of many factors. These include recoverable reserves, future oil 
and gas 

                                       5

<PAGE>

prices, operating costs, future development costs, and potential 
environmental and other liabilities. These assessments are inherently inexact 
and their accuracy uncertain. In connection with such assessments, we review 
the targeted properties in a manner we believe is prudent and consistent with 
industry practice. However, such a review will not reveal all existing or 
potential problems or permit a buyer to become familiar enough with the 
properties to assess fully their deficiencies and capabilities. We may not 
inspect every well, platform or pipeline. Structural and environmental 
problems, such as pipeline corrosion or groundwater contamination, are not 
necessarily observable even when an inspection is made. We may not be able to 
obtain contractual indemnities from the seller for pre-closing liabilities. 
We may be required to assume the risk of the physical condition of the 
properties in addition to the risk that the properties may not perform in 
accordance with our expectations.

           Basin constantly evaluates acquisition and joint venture 
opportunities and frequently engages in bidding and negotiation for 
acquisitions, many of which are substantial. If successful in this process, 
Basin may need to alter or increase its capitalization substantially to 
finance these acquisitions or joint ventures through the issuance of debt or 
equity securities, the sale of production payments or otherwise. These 
changes in capitalization may significantly affect Basin's risk profile. 
Additionally, significant acquisitions or joint ventures can change the 
character of the operations and business of Basin depending upon the 
character of the properties, which may be substantially different in 
operating or geological characteristics or geographic location than existing 
properties. We cannot assure you that Basin will be successful in the 
acquisition or development of any material property interests.

EXPLORATION RISKS - BASIN'S GROWTH STRATEGY SUBSTANTIALLY DEPENDS ON THE 
SUCCESS OF ITS EXPLORATION, A HIGH-RISK ACTIVITY. BASIN USES 3-D SEISMIC AND 
OTHER ADVANCED TECHNOLOGIES TO MITIGATE EXPLORATION RISK, BUT SUCH 
TECHNOLOGIES ARE EXPENSIVE, REQUIRE EXPERIENCED PERSONNEL, AND CANNOT 
ELIMINATE EXPLORATION RISK.

            Basin has spent a large portion of its capital budget on 
exploration in recent years and anticipates continuing to do so in the 
future. Exploration activities are substantially more risky than development 
or exploitation activities. We use 3-D seismic data and other advanced 
technologies to reduce our risk, but exploratory drilling remains a 
speculative activity. Even when extensively utilized and properly 
interpreted, 3-D seismic data and visualization techniques only assist 
geoscientists in identifying subsurface structures and hydrocarbon 
indicators. They do not conclusively allow the interpreter to know if 
hydrocarbons are present or if they are economically producible. In addition, 
the use of 3-D seismic data and certain other technologies requires greater 
pre-drilling expenditures than traditional drilling strategies and Basin 
could incur losses as a result of such expenditures. Poor results from our 
exploration activities could have a material adverse effect on our future 
results of operations and financial condition. Basin had conducted no 
previous operations in the Gulf of Mexico prior to opening its regional 
office in late 1995 in Houston, Texas. This operating area is highly 
competitive and Basin's success there will depend on its ability to attract 
and retain experienced geoscientists and other professional staff. Basin's 
Houston office currently has ten geoscientists and petroleum engineers plus 
two engineering consultants, all of whom are experienced in Gulf Coast 
operations. Loss of these experienced personnel could have a material adverse 
impact on Basin's ability to compete in this area.

FUTURE CAPITAL REQUIREMENTS - BASIN'S CAPITAL EXPENDITURES HAVE GENERALLY 
EXCEEDED ITS CASH FLOW. IF WE CANNOT CONTINUE TO ACCESS CAPITAL FROM EXTERNAL 
SOURCES, WE WILL HAVE LESS CAPABILITY TO GROW OUR RESERVES AND PRODUCTION.    

        We need substantial capital to develop and explore our properties and 
acquire additional properties. We will use cash flows from operations to fund 
these expenditures to the extent available. However, generally our capital 
investments have exceeded our cash flows. Historically we have addressed our 
long-term liquidity needs through bank borrowings and the issuance of equity 
securities. We continue to examine the following alternate sources of 
long-term capital:

           -  traditional reserve-base borrowings or the issuance of 
              long-term debt;

           -  the sale of common stock, preferred stock or other equity 
              securities;

           -  the issuance of nonrecourse production-based financing or net 
              profits interests;

           -  sales of non-strategic properties;

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<PAGE>

           -  sales of interests in prospects and technical information; and

           -  joint ventures.

           Basin's ability to access additional capital will depend on a 
number of factors, some of which are beyond our control. These include our 
operational success, the status of the capital markets, and oil and gas 
prices. We may be unable to execute our operating strategy if we cannot 
obtain capital from these sources. See "Management's Discussion and Analysis 
of Financial Condition and Results of Operations - Liquidity and Capital 
Resources."

EFFECTS OF LEVERAGE - OUR DEBT COULD REDUCE OUR FINANCIAL FLEXIBILITY AND 
UNDER CERTAIN CIRCUMSTANCES COULD REQUIRE PRINCIPAL REDUCTIONS THAT WE ARE 
UNABLE TO MAKE.

           We have significant indebtedness.  At year-end 1998, the amount of 
our long-term debt was $80 million, and we had $30 million available to draw 
down under our credit agreement with our banks. Our working capital deficit 
was $13.2 million at year-end 1998, leaving a net total of $16.8 million of 
unutilized credit capacity. Under our credit agreement, our borrowing base is 
re-determined at least semi-annually by our banks, and it is possible that 
any such review could result in a reduction of our borrowing base. This could 
occur as a result of weak oil and gas prices or unsuccessful exploration or 
development activities.

           There are several effects of this leverage on Basin:

           - it may impair our ability to obtain additional financing in the
future for working capital, capital expenditures, acquisitions or general
corporate purposes;

           - a portion of our cash flow from operations must be dedicated to the
payment of interest on our existing indebtedness, which will reduce the
availability of our cash flow to fund working capital, capital expenditures and
other corporate needs;

           - our credit agreement contains restrictive covenants that limit 
our ability to engage in certain transactions;

           - our borrowings under our bank credit facility are at floating 
rates, which may make us vulnerable to increases in interest rates;

           - our credit agreement requires us to make regular interest 
payments, and at the end of the revolving period to make scheduled principal 
payments. In addition, we must make principal payments if our outstanding 
borrowings exceed our borrowing base, as it may periodically be re-determined 
by the banks. If we default in such payments, which may be made in 
installments over six months, our lenders would be entitled to accelerate the 
payment of all amounts owed under our credit facility. We cannot assure you 
that future borrowings or debt or equity financing will be available to pay 
or refinance such required obligations. Our failure to remedy such a default 
could result in a foreclosure by the banks of their mortgages on the 
properties containing our proved reserves.

CEILING LIMITATION WRITE-DOWNS

           We use the full cost method of accounting to report our operations 
for oil and gas properties. Basin capitalizes the costs to acquire, explore 
for and develop oil and gas properties. Under full cost accounting rules, the 
net capitalized costs of oil and gas properties may not exceed a "ceiling 
limit" which is based upon the present value of estimated future net cash 
flows from proved reserves, using constant oil and gas prices and a 10% 
discount factor, plus the lower of cost or fair market value of unproved 
properties. If net capitalized costs of oil and gas properties exceed the 
ceiling limit, we must charge the amount of the excess to earnings. This is 
called a "ceiling limitation write-down." This charge does not impact cash 
flow from operating activities, but it does reduce the book value of our 
shareholders' equity. The risk that we will be required to write down the 
carrying value of our oil and gas properties increases when oil and gas 
prices are low. In addition, write-downs may occur if Basin has substantial 
downward adjustments to its estimated proved reserves. We review the carrying 
value of our properties quarterly, based on prices in effect as of the end of 
each fiscal quarter (or the time of reporting results). We may not reverse 

                                       7

<PAGE>

any such write-downs even if prices increase in subsequent periods, but such 
write-downs do result in reduced subsequent charges for depreciation, 
depletion and amortization. Primarily because of weak oil and gas prices, 
Basin recorded a ceiling limitation write-down for the fourth quarter of 1998 
in the amount of $30.8 million ($38.5 million pre-tax). We cannot assure you 
that we will not have another ceiling limitation write-down in a future 
period if commodity prices continue to weaken.

MARKETING OF PRODUCTION; SEASONALITY

           The marketability of Basin's production depends in substantial 
part on the availability and capacity of gathering systems, pipelines, and 
processing facilities owned and operated by third parties. Federal and state 
regulation of production and transportation, general economic conditions, and 
changes in supply and demand all could adversely affect Basin's ability to 
market its production. Demand for natural gas is highly seasonal, with demand 
generally higher in the colder winter months and in the hot summer months. As 
a result, the price and marketability of our spot market natural gas may vary 
significantly between seasonal periods. If market factors dramatically 
changed, the financial impact on Basin could be substantial. The availability 
of markets is beyond our control.

CONCENTRATION OF VALUE

           At December 31, 1998, over 80% of our daily production was from 12 
wells on nine platforms in the Gulf of Mexico. If mechanical problems, 
storms, or other events curtailed a substantial portion of this production, 
Basin's cash flow would be materially adversely affected. UNCERTAINTY OF 
ESTIMATES OF OIL AND GAS RESERVES - RESERVE ESTIMATES ARE INHERENTLY 
UNCERTAIN AND DEPEND ON MANY ASSUMPTIONS WHICH MAY TURN OUT TO BE UNTRUE.     
       This Form 10-K contains estimates of our proved oil and gas reserves 
and the estimated future net revenues from such reserves. Basin's historical 
proved reserve information incorporated by reference in this Form 10-K 
represents only estimates based on reports prepared in part by independent 
petroleum engineers and in part by internal Basin engineers. The process of 
estimating oil and gas reserves is complex and inherently uncertain. It 
requires various assumptions, including assumptions required by the SEC 
relating to oil and gas prices, drilling and operating expenses, capital 
expenditures, taxes and availability of funds. Production rates and timing of 
development expenditures must be projected. Available geological, 
geophysical, production and engineering data must be analyzed, and the 
extent, quality and reliability of this data can vary. Oil and gas reserve 
engineering is a subjective process of estimating accumulations of oil and 
gas that cannot be measured in an exact manner, and estimates of other 
engineers might differ materially from those shown. The accuracy of any 
reserve estimate is a function of the quality and quantity of available data, 
engineering and geological interpretation and judgment.

           Actual future production, oil and gas prices, revenues, taxes, 
development expenditures, operating expenses and quantities of recoverable 
oil and gas reserves most likely will vary from those estimated. Any 
significant variance could materially affect the estimated quantities and 
present value of reserves set forth in this Form 10-K. In addition, we may 
adjust estimates of proved reserves to reflect production history, results of 
exploration and development, prevailing oil and gas prices and other factors, 
many of which are beyond our control. Our reserves at December 31, 1998 were 
lower than they would have been if oil and gas prices in effect at year-end 
1997 were still in effect.

           At December 31, 1998, approximately 31% of our estimated proved 
reserves were undeveloped. Recovery of undeveloped reserves generally 
requires significant capital expenditures and successful drilling operations. 
The reserve data assumes that we will make these expenditures. Although we 
have estimated our reserves and the costs associated with developing them in 
accordance with industry standards, we cannot assure you that the estimated 
costs are accurate, that development will occur as scheduled or that the 
results will be as estimated.

           You should not assume that the present value of future net 
revenues referred to in this Form 10-k is the current market value of our 
estimated oil and gas reserves. In accordance with SEC requirements, the 
estimated discounted future net cash flows from proved reserves are generally 
based on prices and costs as of the date of the estimate. Actual future 
prices and costs may be materially higher or lower than the prices and costs 
as of the date 

                                       8

<PAGE>
of the estimate. Recent significant declines in oil and gas prices have 
reduced Basin's present value of future net revenues. See "Oil and Gas 
Prices; Hedging." Any material changes in aggregate consumption by gas 
purchasers or in governmental regulations or taxation could also affect 
actual future net cash flows. The timing of development of oil and gas 
properties will affect both the production and the timing of actual future 
net cash flows from proved reserves and their present value. In addition, the 
10% discount factor, which is required by the SEC to be used in calculating 
discounted future net cash flows for reporting purposes, is not necessarily 
an appropriate discount factor for estimating the value of oil and gas 
reserves. The effective interest rate at various times and the risk 
associated with Basin, the properties, or the oil and gas industry in general 
will affect the reasonableness of the 10% discount factor.

FLUCTUATIONS IN QUARTERLY RESULTS - THESE FLUCTUATIONS CAN CAUSE SUDDEN 
CHANGES IN THE MARKET PRICE OF OUR COMMON STOCK.

           Basin's quarterly results of operations may fluctuate 
significantly as a result of variations in oil and gas prices, production 
performance and changes in estimated proved reserves. The market price of our 
common stock can be expected to decline when our quarterly results decline or 
when announcements of adverse events regarding the Company or the industry 
are made.

OPERATING HAZARDS - THE OIL AND GAS BUSINESS INVOLVES MANY OPERATING RISKS 
WHICH CAN CAUSE SUBSTANTIAL LOSSES. INSURANCE MAY NOT BE ADEQUATE TO PROTECT 
AGAINST ALL THESE RISKS.

           The oil and gas business involves a variety of operating risks. 
These include the risk of fire, explosion, blow-out, uncontrollable flows of 
oil, gas, or well fluids, natural disasters, pipe failure, casing collapse, 
stuck tools, abnormally pressured formations and environmental hazards such 
as oil spills, gas leaks, pipeline ruptures and discharges of toxic gases. 
The occurrence of any of these events could result in substantial losses to 
Basin. Losses can occur from injury or loss of life, severe damage to and 
destruction of property, natural resources and equipment, pollution and other 
environmental damage, clean-up responsibilities, regulatory investigation and 
penalties and suspension of operations. These problems can affect wellbores, 
platforms, gathering systems and processing facilities, and any significant 
problems related to those facilities could adversely affect Basin's ability 
to conduct its operations. Moreover, offshore operations are subject to a 
variety of operating risks peculiar to the marine environment, such as 
hurricanes or other adverse weather conditions. These conditions can cause 
substantial damage to facilities and possibly interrupt production. In 
addition, Basin may be liable for environmental damages caused by previous 
owners of properties it purchases. As a result, Basin could incur substantial 
liabilities to third parties or governmental entities. Payment of these 
liabilities could reduce or eliminate the funds available for exploration, 
development or acquisitions, or result in loss of Basin's properties.

           In accordance with industry practice, Basin maintains insurance 
against some, but not all, potential risks. Basin's coverages include, but 
are not limited to, operator's extra expense, physical damage on certain 
assets, comprehensive general liability, automobile, and workers compensation 
insurance. We cannot assure you that our insurance will be adequate to cover 
losses or liabilities. For example, insurance may not cover downhole 
operating risks, such as the costs of retrieving stuck equipment. Also, we 
cannot predict whether insurance will continue to be available at premium 
levels that justify its purchase.

ENVIRONMENTAL REGULATION - OIL AND GAS OPERATIONS ARE SUBJECT TO EXTENSIVE 
ENVIRONMENTAL REGULATION WHICH CAN INCREASE COSTS, CREATE MAJOR LIABILITIES, 
OR PRECLUDE OPERATIONS.

            Oil and gas operations are subject to extensive regulation under 
federal, state and local environmental laws. Generally, regulation relates to 
water and air pollution control and solid waste management, permitting, or 
restrictions on operations in environmentally sensitive areas, such as 
coastal zones, wetlands, and wildlife habitat. We have not performed 
environmental assessments on all of our acquired properties. To date, our 
expenditures for environmental control facilities and for remediation have 
not been significant in relation to our results of operations. We believe, 
however, that the trend toward stricter standards in environmental 
legislation and regulation is likely to continue. Offshore operations are 
subject to more extensive governmental regulation, including regulation that 
may impose absolute liability for environmental damage and allow interruption 
or termination of business activities by government 

                                       9
<PAGE>

authorities. The Oil Pollution Act of 1990 also requires proof of financial 
responsibility to cover costs of potential oil spills; the amount of such 
required coverage ranges from $35 million to $150 million based on federal 
risk assessment. From time to time, legislation has been introduced in 
Congress which would reclassify oil and gas production wastes as "hazardous 
waste" under the Resource Conservation and Recovery Act. If such legislation 
were to pass, it could have a significant adverse impact on our operating 
costs. Initiatives regulating the disposal of exploration and production 
waste are also pending or have been enacted in states in which Basin conducts 
operations, and these initiatives could have a similar impact on Basin.

GOVERNMENTAL REGULATION - OIL AND GAS OPERATIONS ARE SUBJECT TO EXTENSIVE 
GOVERNMENTAL REGULATION WHICH CAN AFFECT THE COST, MANNER, OR FEASIBILITY OF 
DOING BUSINESS.

           Development, production and sale of oil and gas are subject to 
extensive federal, state and local governmental regulation. Areas covered 
include operations permits, drilling, plugging and reclamation bonds, 
operational practices and reporting, the spacing of wells, unitization and 
pooling of properties, taxation and environmental protection. The Minerals 
Management Service of the United States Department of the Interior has 
proposed regulations for valuation of crude oil and natural gas produced from 
federal leases, including offshore leases, that could require payment of 
royalties on the basis of indices or benchmarks that may not reflect actual 
prices Basin receives for its production. The Federal Energy Regulatory 
Commission has promulgated major regulatory initiatives over the past several 
years which have had a significant impact on natural gas pricing and natural 
gas pipeline operations, services and rates. Those changes have significantly 
altered the marketing of natural gas. Although the purpose of these changes 
is generally to enhance competition in natural gas marketing, the effect of 
these changes on our ability to market our gas at reasonable prices is 
uncertain. Regulatory agencies in the past have imposed price controls and 
limitations on production by restricting the rate of flow of oil and gas 
wells below actual production capacity in order to conserve supplies of oil 
and gas. Under the Outer Continental Shelf Lands Act, the Minerals Management 
Service regulates development and production of oil and gas in federal waters 
in the Gulf of Mexico. The Minerals Management Service may suspend or 
terminate operations for violation of its rules. Any such suspension or 
termination could materially and adversely affect Basin's financial condition 
and operations. There are many legislative proposals pending in Congress and 
in the legislatures of various states that, if enacted, might significantly 
affect the oil and gas industry. Basin is not able to predict what will be 
enacted and thus what effect, if any, such proposals would have on Basin.

COMPETITION - WE ARE SMALLER AND LESS EXPERIENCED THAN MOST OF OUR 
COMPETITORS IN THE GULF OF MEXICO.

           Competition in the oil and gas industry is intense, particularly 
in the Gulf of Mexico. We compete with major and independent oil and gas 
companies for property acquisitions and for the equipment and labor required 
to operate and develop such properties. Most of Basin's competitors have 
financial and other resources substantially greater than ours. We commenced 
operations in the Gulf of Mexico area during 1996, where we had not 
previously been active. Competition from major and large independent oil and 
gas companies is significantly greater in this area than in the Rocky 
Mountain region, where Basin had conducted all of its previous operations.

PRINCIPAL STOCKHOLDER - HE IS IN A POSITION TO AFFECT CORPORATE TRANSACTIONS 
AND OTHER MATTERS.

           Basin's principal stockholder, Michael S. Smith, together with 
members of his immediate family and trustees for their benefit, beneficially 
own approximately 18% of Basin's outstanding shares. As a result, Mr. Smith 
is in a position to substantially influence the outcome of stockholder votes 
on the election of directors and other matters. In addition, if Mr. Smith 
were to sell a significant number of his shares, the prevailing market price 
of Basin's Common Stock could be adversely affected.

                                       10

<PAGE>

DEPENDENCE ON KEY PERSONNEL

           Basin depends to a large extent on the services of its founder and 
CEO, Michael Smith, and certain other senior management personnel in Denver 
and Houston. The loss of the services of Mr. Smith or other key personnel 
could have a potential adverse effect on Basin's operations.

YEAR 2000 READINESS  DISCLOSURE AND STATEMENT - BASIN OR ITS BUSINESS  
PARTNERS MAY NOT BE YEAR 2000 COMPLIANT,  WHICH COULD RESULT IN DISRUPTION OF 
OUR OPERATIONS.

           Basin expects to have completed its assessment, identification, 
remediation and testing of the Year 2000 readiness of its critical 
Information Technology ("IT") systems and its non-IT systems containing 
embedded microprocessors before January 1, 2000, and to have received 
satisfactory assurances by that date from its business partners that they 
will be Year 2000 compliant insofar as their goods or services are material 
to Basin's business. However, there is no assurance that Basin's Year 2000 
readiness project will succeed in accurately and completely identifying all 
potential problems or all potentially affected systems or in remedying all 
problems in its systems. There is no assurance that Basin's business partners 
will likewise succeed in their respective efforts to remedy their Year 2000 
problems or that this will be apparent in time for Basin to formulate a 
contingency plan.

           Between now and 2000 there will be increased competition for 
people with technical and managerial skills necessary to deal with the Year 
2000 problem, and Basin or its business partners could face shortages of 
skilled personnel or other resources, such as particular microprocessors or 
components containing Year 2000-ready microprocessors. These shortages might 
delay or otherwise impair Basin's ability to assure that its critical systems 
or its partners systems are Year 2000 compliant.

           It is particularly difficult to find and remediate all embedded 
microprocessors in non-IT systems. Some of the embedded microprocessors that 
fail to operate or that produce anomalous results may create system 
disruptions or failures. Some of these disruptions or failures may spread 
from the systems in which they are located to other systems causing adverse 
effects upon Basin's ability to maintain production operations, conduct new 
drilling operations, execute financial transactions, manage its reporting or 
fulfill its legal obligations. The embedded microprocessor problem is widely 
recognized as one of the more difficult aspects of the Year 2000 problems 
across industries and throughout the world. The possible adverse impact of 
the embedded microprocessor problem is not, and will not be, unique to Basin. 
           If there are Year 2000-related failures in critical systems of 
Basin or its business partners that create substantial disruptions to Basin's 
business, the adverse impact on Basin could be material. Additionally, Year 
2000 costs are difficult to estimate accurately because of unanticipated 
vendor delays, technical difficulties, the impact of tests of third-party 
systems, and similar events. Moreover, despite Basin's belief that its costs 
in becoming Year 2000 compliant will not be material, its cost assessments do 
not take into account the costs, if any, that might be incurred as a result 
of Year 2000-related failures that occur despite its compliance efforts.

ANTI-TAKEOVER PROVISIONS - THESE PROVISIONS COULD DETER CHANGE OF CONTROL 
TRANSACTIONS.

           Basin's Restated Certificate of Incorporation and Bylaws and the 
provisions of the Delaware General Corporation Law make it more difficult to 
change control of Basin and replace incumbent management. Basin adopted a 
Stockholders' Rights Plan in 1996. Under this Plan, holders of Basin's Common 
Stock received rights exercisable if a person or group of affiliated persons 
acquires 15% of Basin's outstanding Common Stock or commences a tender or 
exchange offer which would result in ownership of 15% or more of Basin's 
outstanding Common Stock. In addition, Basin has entered into agreements with 
certain of its executive officers which would require additional payments by 
Basin if such officers' employment were terminated, or the terms of such 
employment were materially altered, upon a change of control.

                                       11

<PAGE>

ITEM 2. PROPERTIES.

           Prior to 1996, the Company's oil and gas properties were all 
located in the Rocky Mountain region, primarily in the D-J Basin, Powder 
River Basin, and Green River Basin. During 1996, the Company sold its D-J 
Basin assets and initiated operations in the Gulf of Mexico. As of December 
31, 1998, the Company's estimated proved reserves totaled approximately 8.7 
million barrels of oil and 127.5 Bcf of natural gas, or 179.5 Bcfe. The 
estimated pre-tax present value of future net revenues from these proved 
reserves, using December 31, 1998 product prices held constant and a discount 
rate of 10%, totaled approximately $164.5 million. Gulf of Mexico properties 
accounted for 75% of the Company's proved reserve quantities at December 31, 
1998, and 92% of the related pre-tax present value of future net revenues 
estimated as of that date. Weighted average price used for purposes of 
estimating the Company's proved reserves at December 31, 1998 were $10.31 per 
barrel of oil and $1.99 per Mcf of natural gas.

           In addition to its proved properties as of December 31, 1998, the 
Company owned mineral rights under 255,141 gross undeveloped acres, or 
180,816 net undeveloped acres, of which more than half is located in the Gulf 
of Mexico. The Company had also licensed 3-D seismic data covering 
approximately 600 lease blocks, and 2-D data covering approximately 375,000 
miles, in the Gulf of Mexico. The Company's undeveloped acreage in the Gulf 
of Mexico at the end of 1998 contained over 40 exploratory prospects 
identified by the Company's geoscientists, based upon their interpretations 
of 3-D seismic and other data.

           The Company's Gulf of Mexico proved reserves as of December 31, 
1998 were distributed among 18 fields. Production had been established from 
14 of these fields at that date, and the other four fields were under 
development for first production. The Company's working interests in the 18 
fields ranged from approximately 8% to 100%, with an average of 54%. Basin 
operates 11 of the 18 fields. These 11 properties account for approximately 
two-thirds of the Company's total proved reserves in the Gulf of Mexico. Six 
of the properties account for approximately 51% of the Company's proved 
reserve quantities and 67% of its related pre-tax present value of future net 
revenues from Gulf of Mexico assets as of December 31, 1998. These properties 
include Eugene Island Block 65, High Island Block A-568, West Cameron Block 
45, West Cameron Block 56, West Delta Block 61 and West Delta Blocks 121/122. 
As is generally the case for Gulf of Mexico properties, the Company's 
properties in this area are generally expected to exhibit a high initial 
production rate followed by a steep decline in production after a relatively 
short period.

           Most of the Company's proved reserves value related to onshore 
assets as of December 31, 1998 was concentrated in six fields in the Powder 
River and Green River Basins. This value was broadly distributed among 
approximately 200 producing wells, as well as a considerable number of 
undeveloped locations. Most of the Company's producing wells in the Rocky 
Mountain area have been on-line for several years and their respective 
production declines are relatively moderate and well-established.

           Additional information related to the Company's properties is set 
forth below in the balance of this section.

OIL AND GAS RESERVES

           Basin engaged Ryder Scott Company Petroleum Engineers, independent 
petroleum engineers, to prepare estimates of proved reserves, projected 
future production, and related future net revenues for certain of the 
Company's properties as of December 31, 1998, and to audit Basin's estimates 
of such data for the Company's remaining properties as of that date. The 
estimates prepared by Ryder Scott Company Petroleum Engineers covered 
properties that accounted for 53% of the Company's proved reserve quantities 
in the Gulf of Mexico as of December 31, 1998, and audits conducted by Ryder 
Scott Company covered the other properties. Estimates prepared by Ryder Scott 
Company or the Company's engineers were based upon a review of production 
histories and other geologic, economic, ownership, volumetric and engineering 
data. In determining the estimates of the reserve quantities that are 
economically recoverable, oil and gas prices and estimated development and 
production costs as of December 31, 1998 were utilized.

           The following table sets forth estimates as of December 31, 1998 
derived from Basin's reserve reports. The present values (discounted at 10 
percent) of estimated future net revenues before income taxes shown in the 
table are not intended to represent the current market value of the estimated 
oil and gas reserves owned by Basin. For further information concerning the 
present value of future net revenue from these proved reserves, see Unaudited 
Supplemental Oil and Gas Reserve Information in the Consolidated Financial 
Statements.

                                       12

<PAGE>

<TABLE>
<CAPTION>
                                                                           PROVED RESERVES
                                                                --------------------------------------
                                                                 DEVELOPED     UNDEVELOPED    TOTAL
<S>                                                             <C>            <C>          <C>
Oil (MBbls).................................................         3,352         5,315        8,667
Gas (MMcf) .................................................       103,271        24,231      127,502
Total (MMcfe) ..............................................       123,383        56,121      179,504

Future Net Revenue Before Income Taxes
  (in thousands) ...........................................     $ 170,691      $ 45,413    $ 216,104
Present Value of Future Net Revenue Before Income Taxes
  (in thousands)............................................     $ 137,775      $ 26,710    $ 164,485

</TABLE>

           The  following  table sets forth  estimates of Basin's  total proved
reserves at December 31, 1998 by  geographic  area of operations:

<TABLE>
<CAPTION>
                                     PROVED RESERVES
                             ------------------------------
                               OIL         GAS        TOTAL
                             (MBBLS)     (MMCF)      (MMCFE)
<S>                          <C>        <C>         <C>
Gulf of Mexico                4,281     109,626     135,312
Onshore                       4,386      17,876      44,192
                              -----     -------     -------
  Total                       8,667     127,502     179,504
                              -----     -------     -------
                              -----     -------     -------

</TABLE>

           There are numerous uncertainties inherent in estimating quantities 
of proved reserves and in projecting future rates of production and timing of 
development expenditures, including many factors beyond the control of the 
producer. The reserve data set forth herein represent only estimates. Reserve 
engineering is a subjective process of estimating underground accumulations 
of oil and gas that cannot be measured in an exact way, and the accuracy of 
any reserve estimate is a function of the quality of available data and of 
engineering and geological interpretation and judgment and the existence of 
development plans. In addition, results of drilling, testing and production 
subsequent to the date of an estimate may justify revision of such estimates. 
Accordingly, reserve estimates are often different from the quantities of oil 
and gas that are ultimately recovered. Further, the estimated future net 
revenues from proved reserves and the present value thereof are based upon 
certain assumptions, including geologic success, prices, future production 
levels and cost, that may not prove correct over time. Predictions about 
prices and future production levels are subject to great uncertainty, and the 
meaningfulness of such estimates is highly dependent upon the accuracy of the 
assumptions upon which they are based. Oil and gas prices have fluctuated 
widely in recent years. There is no assurance that prices will not be 
materially higher or lower than the prices utilized in estimating Basin's 
reserves.

           The weighted average sales prices utilized for purposes of 
estimating Basin's proved reserves and future net revenues therefrom as of 
December 31, 1998 were $10.31 per Bbl for oil and $1.99 per Mcf for gas. 
These prices are below the average prices prevailing during most of 1998, 
when the Company realized average oil and gas prices of $11.80 per Bbl and 
$2.07 per Mcf, respectively, before hedging effects.

           As an operator of domestic oil and gas properties, the Company has 
filed Department of Energy Form EIA-23, "Annual Survey of Oil and Gas 
Reserves," as required by Public Law 93-275. There are differences between 
the reserves as reported on Form EIA-23 and as reported herein. The 
differences are attributable to the fact that Form EIA-23 requires that an 
operator report on the total reserves attributable to wells that are operated 
by it, without regard to ownership (I.E., reserves are reported on a gross 
operated basis, rather than on a net interest basis).

                                       13

<PAGE>

ACREAGE

           The following table sets forth the gross and net acres of 
developed and undeveloped oil and gas leases held by the Company as of 
December 31, 1998. Undeveloped acreage includes leasehold interests which may 
already have been classified as containing proved undeveloped reserves.

<TABLE>
<CAPTION>
                                            DEVELOPED ACREAGE(1)   UNDEVELOPED ACREAGE
                                            --------------------   -------------------
                                              GROSS      NET         GROSS       NET
<S>                                         <C>         <C>        <C>         <C>
Louisiana Offshore.....................      71,428     40,624     125,333      97,131
Texas Offshore.........................      10,440      3,324      11,517       8,351
                                            -------     ------     -------     -------
   Total Offshore......................      81,868     43,948     136,850     105,482
                                            -------     ------     -------     -------

Montana     ...........................        -           -         9,335       7,074
Utah        ...........................       1,810        932      14,979       9,639
Wyoming     ...........................      45,048     25,500      87,489      55,662
Other Onshore..........................       1,910        883       6,488       2,959
                                            -------     ------     -------     -------
   Total Onshore.......................      48,768     27,315     118,291      75,334
                                            -------     ------     -------     -------
            Total......................     130,636     71,263     255,141     180,816
                                            -------     ------     -------     -------
                                            -------     ------     -------     -------

</TABLE>

     (1)   Developed acreage is acreage assigned to producing wells for the
           spacing unit of the producing formation. Developed acreage in certain
           of Basin's properties that include multiple formations with different
           well spacing requirements may be considered undeveloped for certain
           formations, but have only been included as developed acreage in the
           presentation above.

PRODUCTION

           The following table sets forth Basin's net oil and gas production,
average sales prices, and costs and expenses associated with such production
during the periods indicated.

<TABLE>
<CAPTION>
                                             YEAR ENDED DECEMBER 31,
                                       ---------------------------------
                                         1996        1997         1998
<S>                                    <C>         <C>          <C>
Production:
     Oil (MBbls)....................       564         524          725
     Gas (MMcf).....................     4,776       5,509       17,616
     Total (MMcfe)..................     8,160       8,653       21,966
Average Daily
 Production:
     Oil (Bbls).....................     1,540       1,435        1,988
     Gas (Mcf)......................    13,050      15,094       48,262
     Total (Mcfe)...................    22,290      23,704       60,190
Average Sales Price
 Per Unit(1):
     Oil  (Bbl).....................   $ 20.88     $ 19.07      $ 11.80
     Gas (Mcf)......................   $  1.44     $  2.71      $  2.07
     Total (Mcfe)...................   $  2.29     $  2.88      $  2.05
Production Costs Per Mcfe...........   $  0.81     $  0.68      $  0.41

</TABLE>

- -------------------
(1) excluding hedging effects

                                       14

<PAGE>

           Basin owned 306 gross (202 net) producing oil wells and 77 gross 
(49 net) producing gas wells as of December 31, 1998. A well is categorized 
under state reporting regulations as an oil well or a gas well based upon the 
ratio of gas to oil produced when it first commenced production, and such 
designation may not be indicative of current production.

DEVELOPMENT, EXPLORATION AND ACQUISITION EXPENDITURES

           The following table sets forth certain information regarding the 
costs incurred by Basin in its development, exploration and acquisition 
activities during the periods indicated.

<TABLE>
<CAPTION>
                                                       YEAR ENDED DECEMBER 31,
                                                 ----------------------------------
                                                  1996           1997         1998
                                                        (IN THOUSANDS)
<S>                                              <C>          <C>          <C>
Development Costs ............................   $  4,472     $ 17,901     $ 22,671

Exploration Costs.............................     10,250       27,995       58,063

Property Acquisition Costs:
    Unproved(1) ..............................      5,056       11,057       22,920
    Proved ...................................      3,067       48,680        3,018
                                                 --------     --------     --------
Total Costs Incurred..........................   $ 22,845     $105,633     $106,672
                                                 --------     --------     --------
                                                 --------     --------     --------

</TABLE>

(1) Excludes $4,914,000, $1,113,000 and $150,000 of costs recouped through 
the resale of partial interests in prospects to industry partners in 1996, 
1997 and 1998, respectively.

DRILLING ACTIVITY

     The following table sets forth the wells drilled and completed by Basin
during the periods indicated.

<TABLE>
<CAPTION>
                                                         YEAR ENDED DECEMBER 31,
                                                         -----------------------
                                            1996                1997               1998
                                            ----                ----               ----
                                       GROSS      NET      GROSS      NET      GROSS      NET
<S>                                    <C>        <C>      <C>        <C>      <C>        <C>
Development:
   Oil...............................     3       2.8         5       5.0         1       1.0
   Gas...............................     -        -          1       0.6         -        -
   Non-productive....................     1        .9         -       -           -        -
                                        ---       ---       ---       ---       ---       ---
      Total..........................     4       3.7         6       5.6         1       1.0
                                        ---       ---       ---       ---       ---       ---
                                        ---       ---       ---       ---       ---       ---
Exploratory:
   Oil...............................     -        -          -       -           -        -
   Gas...............................     -        -          5       3.2         8       4.8
   Non-productive....................     3       1.4         3       1.5         5       2.2
                                        ---       ---       ---       ---       ---       ---
      Total..........................     3       1.4         8       4.7        13       7.0
                                        ---       ---       ---       ---       ---       ---
                                        ---       ---       ---       ---       ---       ---

</TABLE>

PRESENT ACTIVITIES

           On March 17, 1999, the Company submitted apparent winning bids for 
five tracts at the Central Gulf of Mexico lease sale held by the MMS. Such 
tracts comprised 24,023 gross and net undeveloped acres offshore Louisiana. 
If all five tracts are awarded by the MMS, which can choose to reject all 
bids for a given lease, the Company's aggregate cost for the related 
leasehold bonuses will total approximately $3.0 million.

           During 1999, through March 17, the Company's Gulf of Mexico 
activities have included completion of three (1.95 net) exploratory wells 
that were successfully drilled in 1998, drilling of two (0.80 net) 
exploratory wells, of which one (0.15 net) well was an apparent discovery, 
and the drilling of one successful development (0.65 net) well. The 

                                       15

<PAGE>

Company also participated in one (0.60 net) exploratory well in Wyoming, 
which was abandoned in February 1999 due to an apparent underground blowout, 
but which is currently being re-drilled.

ITEM 3. LEGAL PROCEEDINGS.

           The Company is not currently involved in any material legal 
proceedings.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

           No matters were submitted for a vote of security holders during 
the fourth quarter of 1998.

                                    PART II


ITEM 5. MARKET FOR THE REGISTRANT'S COMMON STOCK AND RELATED SHAREHOLDER 
MATTERS.

           Basin's common stock began trading on the NASDAQ National Market 
System on May 13, 1992 under the symbol "BSNX". As of December 31, 1998 there 
were approximately 2,000 beneficial owners of the Company's common stock. The 
following table sets forth, for the periods indicated, the range of high and 
low sales prices, and the closing price at the end of the period, for the 
Company's common stock as reported by the Nasdaq National Market for the last 
two calendar years.

<TABLE>
<CAPTION>
                    HIGH                  LOW               CLOSE
<S>                 <C>                 <C>                  <C>
1997                
First Quarter       $ 7.75               $ 5.88              $ 6.88
Second Quarter      $ 8.75               $ 6.38              $ 7.75
Third Quarter       $17.88               $ 7.63              $16.75
Fourth Quarter      $23.25               $16.38              $17.75

1998
First Quarter       $21.06               $13.88              $20.63
Second Quarter      $23.25               $14.13              $17.63
Third Quarter       $18.50               $ 9.00              $16.56
Fourth Quarter      $18.25               $10.25              $12.56

</TABLE>

           The Company's policy is to retain earnings to support the growth 
of the Company's business. Accordingly, the Board of Directors of the Company 
has never declared a cash dividend on its Common Stock and has no present 
plan to do so. A credit agreement with the Company's bank group limits the 
Company's ability to pay dividends, re-acquire shares of its common stock or 
make certain other distributions.

                                       16

<PAGE>

ITEM 6. SELECTED FINANCIAL DATA.

           The following table sets forth selected consolidated financial 
data for Basin as of the dates and for the periods indicated. The data set 
forth in this table should be read in conjunction with "Management's 
Discussion and Analysis of Financial Condition and Results of Operations" and 
the Consolidated Financial Statements and the related notes thereto that 
follow.

<TABLE>
<CAPTION>
(In thousands, except per share data)
                                                                 1994         1995         1996         1997             1998
                                                               --------     --------     --------     --------         -------
<S>                                                            <C>          <C>          <C>          <C>             <C>
STATEMENTS OF OPERATIONS DATA:
Revenue:
   Oil Sales                                                   $ 19,971     $ 19,632     $ 11,292     $  9,844        $  9,735
   Gas Sales                                                     24,255       20,013        6,890       14,557          38,885
   Gain on Sale of Assets                                            --           --       22,472           --               -
   Interest and Other                                               161          831        1,009          319              79
                                                               --------     --------     --------     --------         -------
                                                                 44,387       40,476       41,663       24,720          48,699
                                                               --------     --------     --------     --------         -------
Costs and expenses:
   Lease Operating Expenses                                       8,642        8,196        4,776        4,600           8,276
   Production Taxes                                               3,432        3,478        1,829        1,260             770
   Depreciation, Depletion and Amortization                      18,163       17,202        7,606       10,622          29,775
   General and Administrative, Net                                4,641        5,498        3,850        3,694           4,380
   Interest and Other                                             3,618        6,929        2,272          764           2,030
   Property Impairment                                               --       26,500           --           --          38,500
                                                               --------     --------     --------     --------         -------
                                                                 38,496       67,803       20,333       20,940          83,731
                                                               --------     --------     --------     --------         -------

Income (Loss) Before Income Taxes                                 5,891      (27,327)      21,330        3,780         (35,032)
Income Tax (Provision) Benefit                                   (2,236)       7,784       (5,760)      (1,324)          6,532
                                                               --------     --------     --------     --------         -------
Net Income (Loss)                                              $  3,655     $(19,543)    $ 15,570     $  2,456        $(28,500)
                                                               --------     --------     --------     --------         -------
                                                               --------     --------     --------     --------         -------
Basic:
    Earnings (Loss) Per Share                                  $    .34     $  (1.82)    $   1.45     $    .22        $  (2.06)
    Weighted Average Shares Outstanding                          10,813       10,710       10,700       11,228          13,859
Diluted:
    Earnings (Loss) Per Share                                  $    .34     $  (1.82)    $   1.45     $    .22        $  (2.06)
    Weighted Average Shares Outstanding                          10,879       10,710       10,730       11,345          13,859

BALANCE SHEET DATA (AT END OF PERIOD):
Working Capital (Deficit)                                      $ (5,646)    $ (2,211)    $ 19,178     $(10,036)       $(13,224)
Net Property and Equipment                                      165,807      134,598       54,800      149,175         187,811
Total Assets                                                    184,855      146,651       84,957      161,959         201,163
Long-term Debt                                                   77,199       77,172          218       11,053          80,000
Total Stockholders' Equity                                       72,575       53,287       68,751      121,365          94,219

</TABLE>

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND 
RESULTS OF OPERATIONS.

           The following discussion is intended to assist in an understanding 
of the Company's results of operations for the three-year period ended 
December 31, 1998 and its present financial condition. The Company's 
consolidated financial statements and notes thereto, which are presented 
elsewhere herewith, contain additional detailed information that should be 
referred to in conjunction with a review of this material.

HISTORY AND OVERVIEW

           Basin is a domestic independent oil and gas company that conducts 
exploration, acquisition, exploitation and production activities in the 
shallow waters of the Gulf of Mexico and selected areas onshore.

                                       17

<PAGE>

           The Company commenced operations in 1981 and completed an initial 
public offering of its common stock in 1992. From its inception through 1991, 
Basin primarily acquired, developed and exploited properties in the 
Denver-Julesburg ("D-J") Basin in eastern Colorado. The Company subsequently 
expanded into other areas within the Rocky Mountain region and initiated 
exploration activities.

           During 1995, the Company's capital expenditures on oil and gas 
properties declined to $16 million, from $67 million the year before, due 
primarily to fewer quality investment opportunities identified in the 
Company's core operating areas and limited unutilized borrowing capacity 
under the Company's revolving line of credit with its bank group (the "Credit 
Facility"). Each of these factors was exacerbated by depressed regional gas 
prices.

           In response to these developments and management's assessment of 
alternative investment opportunities, the Company implemented a significant 
redirection of its business strategy and operations between late-1995 and 
mid-1996, which included: (i) the addition of new financial, technical and 
business development members to its senior management; (ii) the sale of its 
D-J Basin properties for $123.5 million (the "D-J Sales"); (iii) 
establishment of a Houston-based Gulf of Mexico exploration team through 
hiring geoscientists and petroleum engineers with substantial experience 
operating in the shallow waters of the Gulf of Mexico; and (iv) a substantial 
reduction in corporate general and administrative overhead.

           The D-J Sales, which occurred in two transactions closed in March 
and June 1996, enabled the Company to eliminate its long-term debt and 
establish cash reserves, thus providing considerable liquidity for 
investments in new capital projects. However, the divestitures reduced the 
Company's estimated proved oil and gas reserves and production rates at the 
time by approximately 70%, resulting in a significant initial decline in 
revenue and cash flow.

           The Company began Gulf of Mexico activities in 1996 with no 
initial property base in the region and early investments related primarily 
to acquisitions of three-dimensional seismic data and exploratory leasehold 
interests and overhead. The Company's first significant discovery in the Gulf 
of Mexico was the Eugene Island Block 65 #1 well, which was drilling at the 
end of 1996 and completed in 1997. The Company realized first production from 
Gulf of Mexico assets in August 1997 when it brought two wells drilled on 
Eugene Island Block 65 on-line, providing the first significant addition to 
the Company's producing property base following the D-J Sales. The Company 
added other proved properties in the Gulf of Mexico in 1997 and 1998 through 
both exploratory drilling and acquisitions and as of December 31, 1998 owned 
interests in 18 proved properties in the area, of which 14 were producing and 
four were under development for first production. Several of the properties 
producing at that date also had proved nonproducing reserves under 
development. Through December 31, 1998, the Company had drilled a total of 31 
wells in the Gulf of Mexico, of which 20, or 65%, had been successful. The 
Company's estimated proved oil and gas reserves increased from 62.6 Bcfe as 
of December 31, 1995, pro forma the D-J Sales, to 179.5 Bcfe at the end of 
1998. As described below, Basin's net production has increased significantly 
since mid-1997, as Gulf of Mexico properties have been brought on-line, and 
the Company expects further increases in 1999.

           During 1998, the Company's capital expenditures totaled 
approximately $107 million. Approximately 96% of these investments related to 
operations in the Gulf of Mexico, including costs incurred for exploratory 
leaseholds, geological and geophysical data, exploratory drilling, and 
completion and development activities. Capital expenditures in 1998 were 
funded with a combination of cash flow, working capital, and borrowings under 
the Credit Facility.

           The Company closed 1998 with a working capital deficit of 
approximately $13 million, long-term debt of $80 million, and stockholders' 
equity of $94 million. Stockholders' equity at the end of the period 
reflected the impact of a $38.5 million pre-tax non-cash impairment charge in 
the fourth quarter of 1998 to reduce the carrying value of the Company's oil 
and gas properties. This charge, which had no impact on the Company's cash 
flow or its borrowing capacity under the Credit Facility, was precipitated by 
low oil and gas prices in effect at year-end.

           The Company's preliminary budget for 1999 provides for capital 
investments of approximately $65 million, subject to potential increase 
should proceeds be realized from asset sales. This budget provides for 
exploratory drilling activities comparable to the level of such activities in 
1998, and for continued expeditious development of drilling successes. The 
1999 budget provides for a smaller current year investment in prospect 
leaseholds than in 1998, and anticipates cost savings realizable from lower 
rates for drilling rigs and other oilfield goods and services than were 

                                       18

<PAGE>

applicable during much of 1998. This budget may be revised up or down due to 
a number of factors, including future developments that impact availability 
of capital.

OPERATING ENVIRONMENT

           Basin's results of operations are significantly impacted by oil 
and gas price levels, which are volatile and largely beyond the Company's 
control. Changes in oil and gas prices can also impact the amount and terms 
of external capital resources available to the Company.

           Gas prices generally respond to North American supply and demand 
conditions, including the effects of weather, whereas oil prices reflect 
global supply and demand conditions to a greater degree, including the impact 
on supply of decisions by petroleum exporting countries. Despite temporary 
periods of interrupted growth, oil and gas demand has generally increased 
over time. Short-term fluctuations in demand can significantly impact prices, 
however. During the past several months, the markets for both oil and gas 
have generally reflected ample supply and price weakness due to a number of 
factors, including a second consecutive unusually warm winter in North 
America. There are well-developed futures markets for oil and gas that 
provide indications of expected future prices for each product. These prices 
are frequently substantially different than current prices reflected on the 
spot market. Presently, these markets reflect expectations of a future 
recovery of oil and gas prices, particularly for gas, which accounted for 80% 
of the Company's total production in 1998. Expectations will change in 
response to future developments and higher future prices may not actually 
materialize.

           Hedging transactions can be entered into based on prices reflected 
in commodity futures markets. The Company periodically enters into fixed 
price sales agreements or other hedging transactions to take advantage of 
prices that it believes to be attractive and to reduce volatility of net 
price realizations. The Company has executed various hedging transactions to 
mitigate its exposure to further commodity price weakness, as described 
herein under Liquidity and Capital Resources and in the Notes to Consolidated 
Financial Statements. However, since its hedges cover only a portion of its 
anticipated future production, the Company remains vulnerable to the 
potential effects of low prices.

           The decline in oil and gas prices during the past year has 
negatively impacted access to capital resources for most energy companies, 
including Basin. Besides unfavorably affecting cash flow, this weakness in 
oil and gas prices has increased the cost of issuing long-term debt or equity 
securities and made the ability to issue such securities, at any price, less 
certain.

           For oil and gas producers, these effects have been partially 
mitigated by improvements in the environment for acquisition of proved and 
unproved oil and gas properties, and costs of conducting exploration and 
development activities. In the opinion of management, diminished capital 
resources for energy companies, in the aggregate, has resulted in significant 
overall improvement of the quality and terms of investment opportunities that 
are currently available, compared to the period preceding the decline in oil 
and gas prices that occurred during the past year. In addition to an enhanced 
market for acquirors of exploratory prospects or producing properties, there 
have been substantial reductions in the costs of oilfield goods and services. 
At various times in the recent past, demand for oil and gas drilling rigs and 
other oilfield products and services has strained available capacity, leading 
to high cost levels, delays in obtaining materials and services, and 
instances of decreased quality of goods and services. Such conditions do not 
presently apply, and availability of and costs for such goods and services 
have improved markedly since mid-1998. As an example, the day rate for a 
typical shallow-water jack-up drilling rig used by the Company in the Gulf of 
Mexico has declined from approximately $40,000 to $15,000. Other costs have 
declined by smaller amounts, but still significantly. As noted, these 
conditions reflect reduced demand for such goods and services in an 
environment of relatively low oil and gas prices and, as such, some reversal 
would be expected if oil and gas prices strengthen.

           The Company's Gulf of Mexico exploration activities are dependent 
on the Company's ability to continue to identify prospects and obtain 
interests in prospect leaseholds. The Company generally utilizes speculative 
three-dimensional seismic data as a tool in its prospect generation. This 
data is not proprietary and is available to competitors, which tends to 
increase the number of potential competitors for, and cost of, available 
prospects. During 1998, the Company was successful in expanding its inventory 
of potential exploratory drilling locations from approximately 30 to 40, 
while drilling 16 test wells. The Company also participated in submitting 
high bids for five leases with identified exploratory prospects at a Central 
Gulf of Mexico lease sale held in March 1999. This inventory of prospects, 
the majority of which are 100%-owned by the Company, represents more than a 
two-year set of drilling opportunities for Basin, based on both historical 
and anticipated drilling activity levels. However, the Company faces 

                                       19

<PAGE>

competition for prospects from many better-capitalized oil and gas companies 
and there is no assurance that over the longer term, the Company will be able 
to continue to acquire interests in prospects at acceptable costs to 
replenish its inventory of prospects as these are drilled. The Company seeks 
to mitigate this risk by pursuing prospect ownership through a number of 
avenues, including lease sales, farm-ins, exchanges, and acquisitions. The 
Company also plans to selectively evaluate and pursue other investment 
opportunities, including onshore exploration and acquisitions of properties 
with proved oil and gas reserves, to complement its core exploration 
activities in the Gulf of Mexico.

RESULTS OF OPERATIONS

           The following table sets forth certain operating information for 
the three years ended December 31, 1998. Because a substantial portion of the 
Company's operations was conducted in the D-J Basin through mid-1996 when the 
D-J Sales were consummated, and because the Company initiated Gulf of Mexico 
operations in 1996 and realized its first production from Gulf of Mexico 
properties in August 1997, period-to-period comparisons of results of 
operations may not be meaningful or indicative of future results.

<TABLE>
<CAPTION>
                                                         Year Ended December 31,
                                                       1996        1997        1998
                                                       ----        ----        ----
<S>                                                 <C>         <C>         <C>
Production:
   Oil (MBbl)                                           564         524         725
   Gas (MMcf)                                         4,776       5,509      17,616
   Total Gas Equivalents (MMcfe)                      8,160       8,653      21,966

Average Sales Price:
   Oil (per Bbl)                                    $ 20.03     $ 18.80     $ 13.42
   Gas (per Mcf)                                    $  1.44     $  2.64     $  2.21
   Total Gas Equivalents (per Mcfe)                 $  2.23     $  2.82     $  2.21

Revenue (in thousands):
   Oil Sales                                        $11,292     $ 9,844     $ 9,735
   Gas Sales                                        $ 6,890     $14,557     $38,885
   Total Oil and Gas Sales                          $18,182     $24,401     $48,620

Expenses (per Mcfe):
   Lease Operating Expenses                         $  0.59     $  0.53     $  0.38
   Production Taxes                                 $  0.22     $  0.14     $  0.03
   Depreciation, Depletion, and Amortization        $  0.93     $  1.23     $  1.36
   General and Administrative, Net                  $  0.47     $  0.43     $  0.20

</TABLE>


                                       20

<PAGE>

1998 COMPARED TO 1997

           As noted, the Company established its first production from Gulf 
of Mexico assets in the second half of 1997. This development, and production 
subsequently added from other Gulf of Mexico properties, significantly 
impacted the Company's results of operations. To assist in interpreting 
year-to-year comparisons, the following quarterly data is provided for the 
two-year period ended December 31, 1998.

<TABLE>
<CAPTION>

Quarter Ended                          March 31    June 30    Sept. 30    Dec. 31    March 31    June 30    Sept. 30    Dec. 31
                                        1997        1997        1997       1997        1998        1998       1998        1998
- -------------                          --------    -------    --------    -------    --------    -------    --------    -------
<S>                                    <C>         <C>        <C>         <C>        <C>         <C>        <C>         <C>
Production:
   Oil (MBbl)                              106         103        147         168        183         189        173         180
   Gas (MMcf)                              403         399      1,688       3,019      3,400       3,936      5,296       4,984
   Total Gas Equivalents (MMcfe)         1,039       1,017      2,570       4,027      4,498       5,070      6,334       6,064
Average Sales Price:
   Oil (per Bbl)                       $ 20.41     $ 17.73    $ 18.59     $ 18.62    $ 14.69     $ 14.26    $ 14.74     $  9.99
   Gas (per Mcf)                       $  2.69     $  1.73    $  2.45     $  2.86    $  2.22     $  2.34    $  2.18     $  2.12
   Total Gas Equivalents (per Mcfe)    $  3.12     $  2.47    $  2.67     $  2.92    $  2.27     $  2.35    $  2.23     $  2.04
Sales Revenue (in thousands):
   Oil                                 $ 2,155     $ 1,828    $ 2,737     $ 3,124    $ 2,690     $ 2,697    $ 2,545     $ 1,803
Gas                                    $ 1,082     $   689    $ 4,139     $ 8,647    $ 7,545     $ 9,219    $11,553     $10,568
   Oil and Gas                         $ 3,237     $ 2,517    $ 6,876     $11,771    $10,235     $11,916    $14,098     $12,371
Expenses (per Mcfe):
   Lease Operating Expenses            $  1.02     $  0.96    $  0.40     $  0.38    $  0.48     $  0.48    $  0.31     $  0.28
   Production Taxes                    $  0.35     $  0.27    $  0.10     $  0.09    $  0.05     $  0.04    $  0.03     $  0.02
   Depreciation, Depletion
     and Amortization                  $  1.12     $  1.21    $  1.16     $  1.30    $  1.33     $  1.33    $  1.33     $  1.42
   General and Administrative, Net     $  0.76     $  0.80    $  0.33     $  0.31    $  0.25     $  0.20    $  0.18     $  0.19

</TABLE>

           REVENUE. Oil and gas sales for 1998 increased by $24.2 million, or 
99%, to $48.6 million. This increase resulted from a 154% increase in 
combined oil and gas production volumes, partially offset by a 22% decrease 
in revenue per net equivalent unit produced, from $2.82 per Mcfe in 1997 to 
$2.21 per Mcfe in 1998. Hedging transactions had the effect of reducing oil 
and gas sales by $0.5 million, or $0.06 per Mcfe, in 1997 and increasing 
sales by $3.5 million, or $0.16 per Mcfe, in 1998.

           The increase in production volumes from 8,653 MMcfe in 1997 to 
21,966 MMcfe in 1998 was attributable to commencement of production at nine 
offshore properties at various times during 1998, and greater contributions 
from offshore properties acquired or brought on-line during the second half 
of 1997, partially offset by natural depletion. The decline in production 
between the third and fourth quarters of 1998 was largely due to the 
temporary loss of production from a major well, which was placed back on-line 
in the first quarter of 1999, after a re-completion operation.

           LEASE OPERATING EXPENSES. Lease operating expenses ("LOE") 
increased in 1998 from the prior year by $3.7 million, or 80%, but LOE per 
Mcfe produced declined by 28% to $0.38, compared to $0.53 in 1997. As shown 
in the above table of quarterly data, the Company's LOE per Mcfe has 
generally improved as Gulf of Mexico production has increased, beginning with 
the third quarter of 1997. An offset to this pattern in the first half of 
1998 primarily reflects costs related to the absorption of properties 
acquired in late-1997 from bankrupt Midcon Offshore, Inc. Typically, the 
Company's Gulf of Mexico properties have significantly lower unit operating 
costs than its Rocky Mountain assets. The relatively low per-unit operating 
cost of the Company's Gulf of Mexico properties is attributable to higher 
average production rates per well and a higher proportion of gas production, 
which is generally less costly to produce than oil.

           PRODUCTION TAXES. Production taxes for 1998 decreased by $0.5 
million, or 39%, as the result of reduced sales revenue from onshore 
properties. This reduction reflects both lower production from onshore assets 
and lower price realizations on such production. Production from properties 
in federal waters offshore is generally not subject to production taxes, 
accounting for the decline in production taxes as a percentage of oil and gas 
sales, from 5.2% in 1997 to 1.6% in 1998.

           DEPRECIATION, DEPLETION AND AMORTIZATION. Depreciation, depletion 
and amortization expense increased by $19.2 million, or 180%, in 1998 to 
$29.8 million. Most of this increase was attributable to a 154% increase in 
production volumes. The average depletion rate (which excludes depreciation 
related to non-oil and gas assets) of $1.31 

                                       21

<PAGE>

per Mcfe of production in 1998 represents a 17% increase from the $1.12 per 
Mcfe recorded in 1997. The higher rate is due to a reduction of estimated 
proved reserves attributable to lower oil and gas prices at the end of 1998 
than one year earlier, and to a cost for proved reserves added in 1998 that 
was above the Company's historical average. The increased unit cost of 
additions in 1998 reflects the substantial portion of the Company's capital 
expenditures in 1998 related to the Gulf of Mexico, where higher unit costs 
are associated with reserves that generally have a higher value per unit than 
the Company's onshore properties, due to faster recoveries of reserves, lower 
production costs, and higher average realizable gas prices.

           GENERAL AND ADMINISTRATIVE EXPENSES, NET. General and 
administrative expenses in 1998 increased by $0.7 million, or 19%, from 1997 
levels, to $4.4 million. The increase in 1998 resulted primarily from 
incremental costs incurred to manage expanded operations in the Gulf of 
Mexico. On a per Mcfe basis, general and administrative expenses during the 
two-year period generally declined as production volumes increased, as 
reflected in the table above.

           INTEREST AND OTHER EXPENSE. Interest and other expense for 1998 
was $2.0 million, representing an increase of $1.3 million, or 166%, compared 
to 1997. The variance was attributable to an increase in average borrowings 
offset by a slight reduction in the Company's average effective interest 
rate. Interest expense in 1998 excludes $1.5 million of interest capitalized 
to unproved property costs in accordance with Statement of Financial 
Accounting Standards No. 34. During 1998, the Company had average outstanding 
debt of $53.4 million with an average effective interest rate of 6.6%, 
compared to average borrowings of $10.2 million and an average interest rate 
of 6.7% in 1997. Substantially all of the borrowings in both years were under 
the Credit Facility.

           PROPERTY IMPAIRMENT. During 1998, the Company recognized a 
property impairment charge of $38.5 million, as the result of the capitalized 
costs of its oil and gas properties exceeding a "ceiling" on such costs 
computed in accordance with prescribed guidelines for companies utilizing the 
full cost accounting method. The charge, which had no impact on the Company's 
cash flows or its bank line of credit, was associated with unusually low oil 
prices in effect at the end of 1998. Additional discussion of the charge, 
including information regarding the methodology prescribed for computing the 
full cost ceiling, is presented in Note 1 to the Consolidated Financial 
Statements.

           INCOME TAX PROVISION. The difference between the income tax 
benefit recorded for 1998 and the amount that would be calculated by applying 
statutory income tax rates to the loss before income taxes is due primarily 
to establishment of a $5.7 million deferred tax asset valuation allowance. 
The income tax provision for 1997 approximates the amount that would be 
calculated by applying statutory income tax rates to income before income 
taxes.

1997 COMPARED TO 1996

           The sale of the Company's D-J Basin assets in the first half of 
1996 and realization of first production from Gulf of Mexico assets in the 
second half of 1997 result in year-to-year comparisons that obscure important 
underlying trends. To assist in understanding such trends, the following 
quarterly data is provided for the two-year period ended December 31, 1997.

<TABLE>
<CAPTION>
Quarter Ended                          March 31    June 30    Sept. 30    Dec. 31    March 31    June 30    Sept. 30    Dec. 31
                                        1996        1996        1996       1996        1997        1997       1997        1997
- -------------                          --------    -------    --------    -------    --------    -------    --------    -------
<S>                                    <C>         <C>        <C>         <C>        <C>         <C>        <C>         <C>
Production:
   Oil (MBbl)                              216         152         98          98        106         103        147         168
   Gas (MMcf)                            2,458       1,465        429         424        403         399      1,688       3,019
   Total Gas Equivalents (MMcfe)         3,754       2,377      1,017       1,012      1,039       1,017      2,570       4,027
Average Sales Price:
   Oil (per Bbl)                       $ 17.94     $ 20.84    $ 21.10     $ 22.31    $ 20.41     $ 17.73    $ 18.59     $ 18.62
   Gas (perMcf)                        $  1.47     $  1.32    $  1.22     $  1.95    $  2.69     $  1.73    $  2.45     $  2.86
   Total Gas Equivalents (per Mcfe)    $  1.99     $  2.14    $  2.54     $  2.98    $  3.12     $  2.47    $  2.67     $  2.92
Sales Revenue (in thousands):
   Oil                                 $ 3,875     $ 3,164    $ 2,064     $ 2,189    $ 2,155     $ 1,828    $ 2,737     $ 3,124
   Gas                                 $ 3,611     $ 1,932    $   522     $   825    $ 1,082     $   689    $ 4,139     $ 8,647
   Oil and Gas                         $ 7,486     $ 5,096    $ 2,586     $ 3,014    $ 3,237     $ 2,517    $ 6,876     $11,771
Expenses (per Mcfe):
   Lease Operating Expenses            $  0.45     $  0.56    $  0.81     $  0.94    $  1.02     $  0.96    $  0.40     $  0.38
   Production Taxes                    $  0.19     $  0.20    $  0.28     $  0.34    $  0.35     $  0.27    $  0.10     $  0.09
   Depreciation, Depletion
     and Amortization                  $  0.89     $  0.89    $  1.06     $  1.04    $  1.12     $  1.21    $  1.16     $  1.30
   General and Administrative, Net     $  0.32     $  0.43    $  0.79     $  0.83    $  0.76     $  0.80    $  0.33     $  0.31

</TABLE>

                                       22

<PAGE>

           REVENUE. Oil and gas sales for 1997 increased by $6.2 million, or 
34%, to $24.4 million, due largely to improved average price realizations. An 
83% increase in gas prices, offset by a 6% decrease in oil prices, yielded a 
26% increase in revenue per net equivalent unit produced, from $2.23 per Mcfe 
in 1996 to $2.82 per Mcfe in 1997. Hedging transactions had the effect of 
reducing oil and gas sales by $0.5 million in both years.

           Production increased by 6% in net equivalent units, from 8,160 
MMcfe in 1996 to 8,653 MMcfe in 1997. The relatively small change in 
production volumes from year-to-year masks significant changes during each 
year due to the D-J Sales in March and June 1996 and the commencement of Gulf 
of Mexico production in August 1997.

           In conjunction with the second D-J Sale transaction, which closed 
in June 1996, the Company recognized a non-recurring $22.5 million gain. 
Other revenue reported in both 1996 and 1997 primarily represented interest 
income on cash equivalents held after the second D-J Sale transaction prior 
to redeploying those proceeds into investments in oil and gas properties.

           LEASE OPERATING EXPENSES. LOE declined in 1997 from the prior year 
by $0.2 million, or 4%, and LOE per Mcfe produced declined by 10%, to $0.53 
in 1997, compared to $0.59 in 1996. Again, the relatively small changes from 
year-to-year do not reflect significant variances within each year. Average 
LOE per Mcfe by quarter reflects that both the properties included in the D-J 
Sales and the Gulf of Mexico properties that began contributing in the second 
half of 1997 have significantly lower unit operating costs than the Company's 
retained Rocky Mountain assets, which have high unit operating costs due to 
relatively low average production rates per well and a high proportion of oil 
production, which is generally more costly to produce than gas.

           PRODUCTION TAXES. Production taxes for 1997 decreased by $0.6 
million, or 31%, as the result of reduced sales from onshore properties in 
1997, due to inclusion in 1996 of production from D-J Basin properties prior 
to the D-J Sales. Production from properties in federal waters offshore is 
generally not subject to production taxes and such taxes did not increase in 
the second half of 1997 as the Company added Gulf of Mexico production. 
Production taxes therefore declined as a percentage of oil and gas sales, 
averaging 5.2% for all of 1997 and 3.3% in the second half of the year, 
compared to 10.1% in 1996.

           DEPRECIATION, DEPLETION AND AMORTIZATION. Depreciation, depletion 
and amortization expense increased by $3.0 million, or 40%, in 1997 to $10.6 
million. The average depletion rate of $1.12 per Mcfe of production in 1997 
represents a 37% increase from the $0.82 per Mcfe recorded in 1996. The 
higher rate is due to the addition of proved reserves in 1997 at a higher 
average unit cost than the Company's historical average and to the 
unfavorable impact on estimated proved reserve quantities of using lower 
assumed future oil and gas prices at the end of 1997 than at the end of 1996. 
The increased unit cost of additions in 1997 reflects the substantial portion 
of the Company's capital expenditures in 1997 related to the Gulf of Mexico, 
where higher unit costs are generally associated with reserves having a 
higher value per unit than the Company's onshore properties, due to typically 
faster recoveries of reserves, lower production costs, and higher average 
realizable gas prices.

           GENERAL AND ADMINISTRATIVE EXPENSES, NET. General and 
administrative expenses in 1997 decreased by $0.2 million, or 4%, from 1996 
levels, to $3.7 million. The decrease in 1997 resulted primarily from staff 
reductions made in mid-1996 in conjunction with the D-J Sales and related 
reductions in office rent expense attributable to the Company's relocation to 
smaller space. These savings, which benefitted all of 1997 but only a portion 
of 1996, were partially offset by higher bonus awards and stock-based 
incentive compensation costs recorded in 1997. On a per Mcfe basis, general 
and administrative expenses during the two-year period generally varied 
inversely with production volumes.

           INTEREST AND OTHER EXPENSE. Interest and other expense for 1997 
was $0.8 million, representing a decrease of $1.5 million, or 66%, compared 
to 1996. The variance was attributable to a decrease in average borrowings 
after the D-J Sales and a reduction in the Company's average effective 
interest rate, reflecting lower prevailing market interest rates and more 
favorable borrowing terms obtained after the D-J Sales. During 1997, the 
Company had average outstanding debt of $10.2 million with an average 
effective interest rate of 6.7%, compared to average borrowings of $28.2 
million and an average interest rate of 8.0% in 1996. Substantially all of 
the borrowings in both years were under the Credit Facility.

                                       23
<PAGE>

           INCOME TAX PROVISION. The income tax provision for 1997 
approximates the amount that would be calculated by applying statutory income 
tax rates to income before income taxes. The 1997 current provision for 
income taxes was decreased, and the deferred provision was increased, by 
approximately $0.5 million due to a change in estimate of current taxes 
payable for fiscal 1996. The difference between the income tax provision 
recorded for 1996 and the amount that would be calculated by applying 
statutory income tax rates to income before income taxes is due primarily to 
reversal of a previously established $2.2 million deferred tax asset 
valuation allowance.

LIQUIDITY AND CAPITAL RESOURCES

           Historically, the Company's principal sources of capital have been 
cash flow from operations, the Credit Facility, proceeds from asset sales, 
and proceeds from sales of common stock. The Company's principal uses of 
capital have been for the exploration, acquisition, development and 
exploitation of oil and gas properties.

           The Company's oil and gas capital expenditures during 1998 totaled 
approximately $106.7 million. Net cash provided by operations before changes 
in working capital totaled $33.7 million. The remainder of 1998 capital 
expenditures was funded primarily through a $69.0 million increase in 
borrowings under the Credit Facility and a $3.2 million reduction in net 
working capital. The Company closed 1998 with a working capital deficit of 
approximately $13.2 million and long-term debt of $80.0 million, all of which 
was outstanding under the Credit Facility. The borrowing base established 
under the Credit Facility as of January 1, 1999 was $110 million.

           For 1999, the Company has established an initial budget for 
exploration and development activities of approximately $65 million, subject 
to potential increase for proceeds from asset sales, if any. The Company 
plans to fund such investments with cash flow from operations, which is 
expected to increase from 1998 levels because of projected production 
increases, and additional borrowings under the Credit Facility. This budget 
is subject to revision to reflect future developments. It may be impacted by 
oil and gas price levels, future re-determinations of the borrowing base 
under the Credit Facility, and other factors. Although this budget is not 
predicated on a future sale of securities, the Company may choose to issue 
securities in certain circumstances, in which case the level of the Company's 
capital expenditures in 1999 would likely increase. Compared to actual 
capital expenditures in 1998, the lower budget presently established for 1999 
reflects a number of considerations including, but not limited to, lower 
assumed oil and gas prices and higher initial debt levels. The impact on 
drilling activity in the current year, compared to 1998, is expected to be 
modest, as most of the decline in expenditures is expected to be offset by 
lower service sector costs or reflected in reduced investments for 
acquisitions of prospect leaseholds. The Company's investments in leaseholds 
in 1998 significantly increased its inventory of exploratory prospects in the 
Gulf of Mexico, to a level representing a multi-year set of drilling 
opportunities. The Company's initial budget for 1999 anticipates investments 
at a level to approximately maintain, rather than significantly expand, its 
inventory of Gulf of Mexico prospects.

           PRODUCTION AND CASH FLOW. The Company's cash flow from operations 
is generally determined largely by its production level and oil and gas 
prices. Since 1996, the Company has made significant investments to initiate 
and then expand its operations in the Gulf of Mexico. These investments have 
resulted in a production ramp-up that increased the Company's production from 
an average rate of 11.2 MMcfe per day in the second quarter of 1997, prior to 
commencement of Gulf of Mexico production, to 68.8 MMcfe per day in the third 
quarter of 1998, before a decline to 65.9 MMcfe per day in the fourth quarter 
of 1998 when a significant well was taken off-line for re-completion 
operations. Based primarily on estimates reflected in the Company's year-end 
1998 reserve reports, the Company anticipates that its net production in 1999 
will be at least 50% greater than during 1998, when production totaled 21,966 
MMcfe. The expected increase is attributable to projected production from 
Gulf of Mexico properties with proved reserves at the end of 1998 that were 
either on-line for only a portion of 1998 or had not yet commenced producing. 
Partially offsetting these additions will be natural depletion-related 
declines in production from existing producing wells. Actual realization of 
the production increases projected for 1999 will be dependent upon meeting 
scheduled dates for commencement of production from wells not yet on-line at 
the end of 1998, and upon achieving projected performance from major wells, 
including certain wells with little or no production history to-date. 
Although management and the Company's independent engineering consultants 
believe the projections are reasonable, there is no assurance that they will 
be met.

           MARKETING AND HEDGING TRANSACTIONS. The Company's production is 
generally sold under month-to-month contracts at prevailing prices. From 
time-to-time, however, as conditions are deemed to warrant, Basin has entered 
into 

                                       24

<PAGE>

hedging transactions or fixed price sales contracts for a portion of its oil 
and gas production. The purposes of these transactions are to limit the 
Company's exposure to future oil and gas price declines and achieve a more 
predictable cash flow. However, such contracts also limit the benefits the 
Company would realize if prices increase. Hedging contracts reduced the 
Company's total revenue by $0.5 million in each of 1996 and 1997, and 
increased revenue by $3.5 million in 1998.

           As of February 24, 1999, the Company was a party to the following 
fixed price swap arrangements (one MMBtu approximates one Mcf of natural gas):

<TABLE>
<CAPTION>
                                       Oil                           Gas
                             -----------------------      -------------------------
                             Average Daily                Average Daily
Time Period                  Volume (Bbl)      $/Bbl      Volume (MMBtu)     $/MMBtu
- -----------                  -------------     -----      --------------     -------
<S>                          <C>               <C>        <C>                <C>
1/1/99 - 3/31/99                1,000          17.00         30,167           2.15
4/1/99 - 6/30/99                1,000          17.00         33,297           2.18
7/1/99 - 9/30/99                                             30,000           2.20
10/1/99 - 12/31/99                                           25,000           2.16
1/1/00 - 12/31/01                                            10,000           2.15

</TABLE>

           In addition, the Company periodically enters into spread trades or 
options transactions related to oil or natural gas futures markets. Under a 
spread trade, fixed prices under a hedging contract are determined in the 
future by reference to the price of an underlying contract. Such positions 
may enable the Company to lock in favorable fixed prices for future hedging 
positions, but can also result in unfavorable fixed price contracts if the 
reference price represented by the underlying contract declines. As of 
February 24, 1999, the Company had entered into spread trades for natural gas 
providing for a fixed price for 20,000 MMBtu per day for the period of March 
2000 through September 2000 to be established in the future upon an election 
by the Company by reference to the underlying NYMEX October 1999 contract 
price less $0.28. The Company also had sold call options for 10,000 MMBtu of 
natural gas per day for the period from March 1999 through April 1999 with a 
strike price of $1.93 per MMBtu, and from January 1999 through December 2001 
with an average strike price of $2.50 per MMBtu. Call options had also been 
sold covering a quantity of 1,000 barrels of oil per day for the period from 
July 1999 through December 1999, at a strike price of $16.75 per barrel. At 
December 31, 1998, the estimated fair value of the open oil and gas price 
hedging contracts was an unrealized gain of approximately $1,170,000.

           CREDIT FACILITY. Effective January 1, 1999, the Company entered 
into an Amended and Restated Credit Agreement (the "Credit Agreement") with 
its existing bank group. The Credit Agreement provides for borrowings of up 
to $110 million under two combined facilities. Facility A was initially 
established at $90 million and represents the borrowing base that is 
considered to be "conforming" based upon the bank's customary practices and 
standards in making conventional borrowing base determinations for oil and 
gas producers. Facility B, initially established at $20 million, is a 
shorter-term supplemental line of credit. The Credit Agreement provides for 
the interest rate on borrowings to be determined by reference to the prime 
rate or LIBOR, at the Company's election. Facility A provides for a varying 
spread of 0% to 0.25% to be added to the prime rate, or 0.75% to 1.5% to be 
applied to LIBOR, based upon the Company's facility usage ratio. Facility B 
provides for a spread of 3.5% to be added to the prime rate, or 4.75% to be 
applied to LIBOR subject to a 0.25% increase in such spreads, effective June 
1, 1999. The Credit Agreement provides for borrowings to be revolving loans 
until November 30, 2001, at which time the outstanding balance will be 
converted into a four-year amortizing term loan unless the Credit Agreement 
is amended, and subject to the scheduled termination of Facility B effective 
May 31, 2000. The borrowing base under the Credit Agreement is scheduled to 
be re-determined at three-month intervals until Facility B is retired, and 
then at six-month intervals until converted into a term loan. The Credit 
Agreement contains various covenants, including ones that could limit the 
Company's ability to incur other debt, dispose of assets, pay dividends, or 
repurchase stock. Pursuant to the Credit Agreement, substantially all of the 
Company's producing properties are subject to mortgages in favor of the banks 
and the Company's remaining properties are subject to a negative pledge.

           The weighted average interest rate on borrowings outstanding under 
the Credit Agreement at December 31, 1998 was 6.2%. The Company's annual 
interest costs will fluctuate based upon fluctuations in short-term interest 
rates. Assuming debt outstanding during 1999 remained unchanged from the 
amount outstanding at the end of 1998, the impact on interest expense, before 
amounts capitalized, of a ten percent change in the average interest rate 
would be 

                                       25

<PAGE>

approximately $500,000. As the interest rate is variable and is reflective of 
current market conditions, the carrying value of the Company's debt 
approximates its fair value.

           Borrowing base re-determinations conducted by the bank group 
reflect a number of estimates and assumptions including, but not limited to, 
future production from the Company's proved properties, risk factors for 
proved reserves, projected oil and gas prices, future operating and 
development costs, and interest rates. Changes in such estimates and 
assumptions can significantly impact the size of the borrowing base 
established by the banks. Because these factors will be influenced by future 
events, which cannot be forecast with certitude, the Company cannot predict 
what level of borrowing base will be established at any future determination 
date. The provision for Facility B was intended, in part, to provide 
short-term funds to develop the Company's proved undeveloped and proved 
developed nonproducing reserves in the Gulf of Mexico. It is anticipated that 
funds drawn under Facility B will be retired through expansion of Facility A, 
if the Company's reserve values are sufficiently increased, or that Facility 
B will be repaid from cash flows or proceeds from asset or security sales. At 
March 19, 1999, $90 million was outstanding under Facility A and $2.5 million 
was outstanding under Facility B.

           Positive or negative changes in the borrowing base during 1999 
would be likely to affect the Company's capital expenditures during the year. 
Increases, supported by performance of the Company's properties, drilling 
results, and/or higher oil and gas prices, could improve the Company's 
ability to grow. Decreases would adversely affect the Company's liquidity and 
capital resources, potentially resulting in a reduction of planned capital 
expenditures or the sale of assets or securities.

           CAPITAL EXPENDITURES. Since the beginning of 1996, Basin has 
focused its exploration activities in the shallow waters of the Gulf of 
Mexico, primarily off the coast of Louisiana. Recently, the Company began to 
direct a small portion of its exploration budget toward onshore 
opportunities, and it pursues acquisition, development, and exploitation 
opportunities in the vicinity of the Company's Gulf of Mexico exploration 
operations, in the Rocky Mountain region where Basin has an existing base of 
proved reserves and producing wells, and in certain other major domestic 
producing basins where the Company believes significant upside potential 
exists. The Company's capital expenditures are generally discretionary and 
activity levels are determined by a number of factors, including oil and gas 
prices, availability of funds, quantity and character of identified 
investment projects, availability of service providers, and competition.

           The Company's capital expenditures in 1998 totaled approximately 
$107 million, of which 96% related to operations in the Gulf of Mexico. 
Approximately $28 million was invested in acquisitions of exploratory 
leaseholds and geological and geophysical data in the Gulf of Mexico. 
Approximately $68 million related to Gulf of Mexico drilling, completion, and 
related development costs. The remainder related to small proved property 
acquisitions and activities onshore. Gulf of Mexico operations in 1998 
included ongoing development of nine productive wells drilled or acquired in 
1997, participation in the drilling of 17 wells, of which 11 were successful, 
and development costs related to the successful wells drilled during the year.

           The Company currently estimates that its capital expenditures for 
exploration and development in 1999 will be approximately $65 million, 
subject to potential increase if proceeds are realized from asset sales. This 
budget primarily provides for: development of seven properties with one or 
more successful wells yet to commence sustained production as of the end of 
1998; investments in seismic data and prospect leaseholds; participation in 
approximately six net (13 to 15 gross) exploratory wells in the Gulf of 
Mexico; participation in a small number of onshore exploration opportunities; 
development of assumed 1999 prospect discoveries; and continued exploitation 
of the Company's other offshore and onshore properties. Although several 
locations for planned 1999 exploratory drilling have been identified, a 
significant portion of the 1999 exploration budget is currently unallocated, 
pending acquisition of drilling partners and formation of joint ventures to 
conduct exploratory operations. The smaller budget in 1999, compared to 
actual expenditures in 1998, is not expected to require a significant 
reduction in drilling activity because of a planned substantial reduction in 
acquisitions of exploratory leaseholds in 1999 and benefits expected to be 
realized from the substantial decline in service sector costs during the past 
year. The reduced budget for exploratory leaseholds reflects the unusually 
large investment made by the Company in 1998 to initially establish a 
multi-year inventory of drilling prospects. New investments planned for 1999 
will seek to approximately maintain this inventory level rather than 
significantly expand it.

           The Company also intends to pursue acquisitions of properties with 
proved and probable reserves as an integral part of its overall business 
strategy, with the expectation that these efforts will result in significant 
investment activity over time. At this time, no portion of the Company's 1999 
budget has been specifically allocated for acquisitions of proved 

                                       26

<PAGE>

properties. If such a transaction is executed, it will likely require a 
re-allocation of budget from other planned activities and/or external 
financing.

           The amount and allocation of future capital expenditures will 
depend on a number of factors that are not entirely within the Company's 
control or ability to forecast, including drilling results, scheduling of 
activities by other operators, availability of service providers, success in 
acquiring prospect leaseholds, and success in consummating acquisitions of 
proved properties. The Company's planned capital expenditures are also based 
on estimates regarding availability of capital that depend on assumptions and 
estimates regarding production, oil and gas prices, and borrowing base 
re-determinations under the Company's Credit Agreement. Due to these 
uncertainties, actual capital expenditures may vary significantly from 
current expectations.

           Should the Company seek to increase its capital expenditure budget 
for 1999 to respond to drilling opportunities that it deems exceptional, to 
fund development of a greater number or larger-sized exploratory successes 
than assumed, or for acquisitions of proved and probable reserves or prospect 
leaseholds, the Company may consider raising additional capital through 
issuance of debt and/or equity securities. The Company may also seek 
additional debt or equity financing in the absence of a specific planned 
increase in capital expenditures, in order to increase financial flexibility 
to capitalize on future opportunities.

           YEAR 2000 READINESS DISCLOSURE AND STATEMENT

           Readers are cautioned that the forward-looking statements 
contained in the following Year 2000 discussion should be read in conjunction 
with the Company's disclosures under the headings "Forward Looking 
Statements" and "Risk Factors" in this report.

           Year 2000 issues result from the inability of many computer 
programs to accurately calculate, store or use a date subsequent to December 
31, 1999. The date can be erroneously interpreted in a number of different 
ways; typically the year 2000 is interpreted as the year 1900. This could 
result in a system failure or miscalculations causing disruptions of or 
errors in operations. Systems potentially affected include not only 
information technology ("IT") systems -- computer systems controlling a 
company's accounting, land, operations, seismic processing, and other 
specialized functions -- but also non-IT systems controlled by embedded 
chips, which include many common and specialized machines and support 
systems. The effects of the Year 2000 problem can be exacerbated by the 
interdependence of computer and telecommunications systems in the United 
States and throughout the world. This interdependence can affect the Company 
and the parties with whom it does business.

           STATE OF READINESS. The Company has created an internal committee 
to assess the Company's Year 2000 readiness and to lead its remediation 
efforts. The committee is composed of the general counsel, chief financial 
officer, controller, and manager of information systems. The committee's 
objective is to prevent loss or impairment of those functions material to the 
Company's operations and business continuity or to avoid potential liability 
to third parties. At the direction of the committee, department heads and 
managers have assessed and remediated the Company's IT and non-IT systems, 
and have communicated with the Company's business partners regarding the 
status of their assessment and remediation efforts, with the results 
summarized below.

           The Company has completed an assessment of its IT systems to 
determine whether they are Year 2000 compliant. The licensors of both the 
Company's core financial, land and operations software system and its 
underlying operating system have certified that such software is Year 2000 
compliant. The Company's Gulf of Mexico seismic data interpretation software 
system is not currently Year 2000 compliant, but the Company has begun an 
upgrade of that system with software which the licensor has represented will 
be compliant. The Company is also upgrading its reservoir economics software 
to make it Year 2000 compliant. The Company expects the upgrade and testing 
of these software systems to be completed by July 1999. Additionally, the 
Company has assessed other less critical IT systems and believes them to be 
compliant.

           The Company also relies on non-IT systems, such as office 
telephones, facsimile machines, HVAC systems and elevators in its leased 
offices, security systems, and automated measuring equipment on platforms and 
other production facilities, which may have embedded technology such as 
micro-controllers. Department heads and managers have identified those non-IT 
systems which may be susceptible to failure or impairment by reason of Year 
2000 problems and which are potentially critical to the Company's operations 
and business continuity. Based on that review, the Company 

                                       27

<PAGE>

has sent written inquiries to the suppliers of those systems to determine 
their Year 2000 compliance. The vendors of the Company's communications 
systems and the property managers of the buildings in which the Company's 
Houston and Denver offices are situated have certified their systems to be 
Year 2000 compliant. The Company is still receiving and analyzing responses 
from vendors of those non-IT systems that may affect the Company's production 
operations. The operations department will follow up those inquiries with 
telephone interviews to assess the status of such systems. Assessment and 
remediation of non-IT systems should be completed by September 1999.  

           The Company has sent written inquiries to its significant 
suppliers, customers, banks, government agencies, benefit plan providers, and 
others with whom the Company has significant business relationships to 
determine the extent to which the Company is vulnerable to those third 
parties' failure to correct their own Year 2000 issues. To date, the Company 
has not received definitive responses from many of these entities and 
therefore cannot assess whether they are Year 2000 compliant or how their 
failure to be compliant would affect the Company. Those third parties who 
have responded have generally indicated that they are either Year 2000 
compliant or expect to be compliant. Department heads and managers have 
compiled a list of critical third parties to whom telephone follow-up will be 
made. For Gulf of Mexico operations, these include representative vendors and 
suppliers who could supply necessary goods and services to maintain the 
Company's production operations and continue any ongoing or planned drilling 
activities. The Company expects to have this follow-up inquiry completed by 
July 1999 and will utilize those vendors and suppliers providing adequate 
assurances regarding their compliance.

           ESTIMATED COMPLIANCE COSTS. The Company has relied primarily on 
its internal staff to assess its current Year 2000 readiness and does not 
anticipate extensive use of external resources to complete its assessment or 
remediation. The Company has not separately quantified its costs of internal 
resources on this project but does not expect that it will incur material 
costs in remediating its IT systems to be Year 2000 compliant. Costs incurred 
for the purchase of new software and hardware are capitalized and all other 
costs are expensed as incurred. The Company has not incurred, and does not 
anticipate that it will incur, costs for external resources in excess of 
$100,000 relating to the assessment and remediation of Year 2000 issues. That 
estimate does not include the cost of remediating problems caused by 
third-party vendors, customers, or other business partners, which the Company 
will not be able to estimate until the extent, if any, of their Year 2000 
non-compliance is known.

           RISKS OF NON-COMPLIANCE AND CONTINGENCY PLANS. As indicated above, 
the only critical IT systems which the Company believes are not yet Year 2000 
compliant are its seismic data interpretation and reservoir economics 
systems, which should be compliant by July 1999. Accordingly, the Company 
does not expect Year 2000 issues to cause its IT systems to have any material 
adverse impact on its business, operations or financial condition. The 
Company believes that the potential impact, if any, of its non-critical IT 
systems not being Year 2000 compliant will at most require employees to 
manually complete otherwise automated tasks or calculations and should not 
impact the Company's ability to continue exploration, drilling, production or 
sales activities. The Company is not able to predict at this time what the 
impact could be of non-IT system failures but does not believe that there 
will be a material disruption of the Company's operations.

           Until the Company has completed its inquiries to third parties, it 
will not be able to assess the potential impact of their failure to be Year 
2000 compliant on the Company's operations, business, or financial condition. 
The most reasonably likely "worst case" impacts could be impairment of the 
Company's ability to deliver its production to, or receive payment from, 
third parties gathering and/or purchasing the Company's production from 
affected facilities, impairment of the ability of third-party suppliers or 
service companies to provide needed materials or services to the Company's 
planned or ongoing operations, thereby necessitating deferral or shut-in of 
exploration, development or production operations, and the inability of the 
Company to execute financial transactions with its banks or other third 
parties whose systems fail or misfunction. The Company currently has no 
reason to believe that any of these contingencies will occur or that its 
principal vendors, customers, and business partners will not be Year 2000 
compliant.

            The Company does not currently have a contingency plan under 
development or in place to address these potential problems. The Company does 
intend to develop contingency plans in response to testing its IT and non-IT 
systems and in response to the results of its third-party inquiries. These 
contingency plans may include installing back-up computer systems or 
equipment, temporarily replacing systems or equipment with manual processes, 
and identifying alternate suppliers, service companies and purchasers. The 
Company expects these plans to be complete by October 1999.

           Basin's Year 2000 program is a continuing process that may result 
in changes to cost estimates and schedules as testing and business partner 
assessment progresses. Unexpected Year 2000 compliance problems of either the 
Company 

                                       28

<PAGE>

or its vendors, customers, service providers, or other entities with whom it 
does business could have a material adverse impact on the Company's business, 
financial condition or operating results.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

           The Company's exposure to interest rate risk and commodity price 
risk is discussed in Item 7. Management's Discussion and Analysis of 
Financial Condition and Results of Operations under the headings "Operating 
Environment", "Liquidity and Capital Resources - Marketing and hedging 
transactions" and "Liquidity and Capital Resources - Credit facility". The 
Company has no exposure to foreign currency exchange rate risks or to any 
other market risks.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

           The Consolidated Financial Statements that constitute Item 8 are 
attached at the end of this report. An index to the Consolidated Financial 
Statements appears in Item 14 of this report.

ITEM 9. CHANGES AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
FINANCIAL DISCLOSURE.

           None.

                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.

           The information required by this item is incorporated by reference 
from the sections entitled "Management" and "Disclosure of Filings by 
Insiders" in the Company's definitive Proxy Statement for its 1999 Annual 
Meeting of Stockholders (the "Proxy Statement") to be filed with the 
Securities and Exchange Commission no later than April 30, 1999.

ITEM 11. EXECUTIVE COMPENSATION.

           The information required by this item is incorporated by reference 
from the section entitled "Executive Compensation" in the Proxy Statement. 
Nothing in this report shall be construed to incorporate by reference the 
Board Compensation Committee Report on Executive Compensation or the 
Performance Graph which are contained in the Proxy Statement, which are 
expressly not incorporated herein.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.

           The information required by this item is incorporated by reference 
from the section entitled "Security Ownership of Certain Beneficial Owners 
and Management" in the Proxy Statement.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.

           The information required by this item is incorporated by reference 
from the section entitled "Certain Relationships and Other Transactions" in 
the Proxy Statement.

                                       29

<PAGE>

                               CERTAIN DEFINITIONS

           The terms defined in this section are used throughout this report.

           ACREAGE HELD BY PRODUCTION. Acreage covered by an oil and gas 
lease which has a producing well on it, or which is pooled with a lease or 
leases having one or more producing wells on them, so the lease is maintained 
in effect for the duration of such production.

           BBL.  One stock tank  barrel,  or 42 U.S.  gallons  liquid  
volume,  used herein in  reference to crude oil or other liquid hydrocarbons.

           BCF. Billion cubic feet (of gas).

           BCFE. Billion cubic feet (of gas) equivalent.

           BEHIND-PIPE RESERVES. Proved reserves in a formation in which 
production casing has already been set in the wellbore, but from which 
production has not commenced.

           BTU. British thermal unit.

           COMMINGLE.  The combining of production from more than one zone in 
the same well to produce from multiple zones at the same time.

           DEVELOPMENT LOCATION. A location on which a development well can 
be drilled.

           DEVELOPMENT WELL. A well drilled within the proved area of an oil 
or gas reservoir to the depth of a stratigraphic horizon known to be 
productive in an attempt to recover proved undeveloped reserves.

           DRILLING LOCATIONS. A site on which a well can be drilled 
consistent with local spacing rules for the purpose of recovering possible, 
probable or proved reserves.

           DRY WELL. A well found to be incapable of producing either oil or 
gas in sufficient quantities to justify completion as an oil or gas well.

           EXPLOITATION. The conduct of a drilling or recompletion operation 
intended to recover reserves from a formation known to be productive in the 
area or on trend with existing production but not classifiable as proved.

           EXPLORATORY WELL. A well drilled to find and produce oil or gas in 
an unproved area, to find a new reservoir in a field previously found to be 
productive of oil or gas in another reservoir, or to extend a known reservoir.

           FARMOUT.  An assignment of an interest in a drilling  location and 
related acreage  conditional upon the drilling of a well on that location.

           GROSS ACRES. An acre in which a working interest is owned.

           GROSS WELL. A well in which a working interest is owned.

           MBBL. One thousand barrels of crude oil or other liquid 
hydrocarbons.

           MBTU. One thousand Btus.

           MCF. One thousand cubic feet (of gas).

                                       30

<PAGE>

           MCFE. One thousand cubic feet of natural gas equivalent. In 
reference to crude oil or other liquid hydrocarbons, equivalents are 
determined using the ratio of one Bbl of crude oil or other liquid 
hydrocarbon to 6 Mcf of gas.

           MMBBL. One million barrels of crude oil or other liquid 
hydrocarbons.

           MMBTU. One million Btus.

           MMCF. One million cubic feet.

           MMCFE. One million cubic feet (of gas) equivalent.

           NET ACRES OR NET WELLS. The sum of the fractional working 
interests owned in gross acres or gross wells.

           OVERRIDING ROYALTY INTEREST. An interest in an oil and gas 
property entitling the owner to a share of oil and gas production free of 
costs of production.

           PRESENT VALUE OF FUTURE NET REVENUES. Estimated future net 
revenues discounted at a rate of ten percent per annum.

           PRODUCTIVE WELL. A well that is producing oil or gas or that is 
capable of production.

           PROVED DEVELOPED RESERVES. Reserves that can be expected to be 
recovered through existing wells with existing equipment and operating 
methods.

           PROVED RESERVES. The estimated quantities of crude oil, natural 
gas and natural gas liquids which geological and engineering data demonstrate 
with reasonable certainty to be recoverable in future years from known 
reservoirs under existing economic and operating conditions.

           PROVED UNDEVELOPED LOCATION. A site on which a development well 
can be drilled consistent with local spacing rules for the purpose of 
recovering proved reserves.

           PROVED UNDEVELOPED RESERVES. Reserves that are expected to be 
recovered from new wells on undrilled acreage, or from existing wells where a 
relatively major expenditure is required for recompletion.

           RECOMPLETION.  The completion for production of an existing  
wellbore in another  formation from that in which the well has previously 
been completed.

           UNDEVELOPED ACREAGE. Lease acreage on which wells have not been 
drilled or completed to a point that would permit the production of 
commercial quantities of oil and gas regardless of whether such acreage 
contains proved reserves.

           WORKING INTEREST. The operating interest which gives the owner the 
right to drill, produce and conduct operating activities on the property and 
a share of production.

                                       31

<PAGE>

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

       (a)(1) and (a)(2) Financial Statements and Financial Statement Schedules

<TABLE>
<CAPTION>
                                                                         PAGE
                                                                         ----
<S>                                                                      <C>
Report of Independent Public Accountants...............................    33

Consolidated Balance Sheets as of December 31, 1997 and 1998...........    34

Consolidated Statements of Operations for the years ended
  December 31, 1996, 1997, and 1998....................................    35

Consolidated Statements of Cash Flow for the years
  ended December 31, 1996, 1997 and 1998...............................    36

Consolidated Statements of Changes in Stockholders' Equity
  for the years ended December 31, 1996, 1997 and 1998.................    37

Notes to Consolidated Financial Statements.............................    38

</TABLE>

           All other schedules are omitted because the required information 
is not applicable or 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.

                                       32

<PAGE>

                     REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the Stockholders and Board of Directors of
  Basin Exploration, Inc.:

           We have audited the accompanying consolidated balance sheets of 
Basin Exploration, Inc. and subsidiaries as of December 31, 1998 and 1997, 
and the related consolidated statements of operations, changes in 
stockholders' equity and cash flow for each of the three years in the period 
ended December 31, 1998. These consolidated financial statements are the 
responsibility of the Company's management. Our responsibility is to express 
an opinion on these consolidated 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 consolidated financial 
statements are free of material misstatement. An audit includes examining, on 
a test basis, evidence supporting the amounts and disclosures in the 
consolidated 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 consolidated financial statements referred to 
above present fairly, in all material respects, the consolidated financial 
position of Basin Exploration, Inc. and subsidiaries as of December 31, 1998 
and 1997, and the results of their operations and their cash flow 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 24, 1999.


                                       33

<PAGE>

BASIN EXPLORATION, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>

December 31, (in thousands, except per share data)                            1997            1998  
- ---------------------------------------------------------------------------------------------------
<S>                                                                       <C>             <C>
ASSETS
CURRENT ASSETS:
   Cash and Equivalents                                                   $      531      $     331
   Accounts Receivable                                                         8,348         10,036
   Prepaids and Other                                                          3,805          2,752
                                                                          ----------      ---------
                                                                              12,684         13,119
                                                                          ----------      ---------
PROPERTY AND EQUIPMENT, at cost:
   Oil and Gas Properties, Under the Full Cost Method of Accounting -
      Proved                                                                 177,704        265,826
      Unproved                                                                15,669         34,039
   Less Accumulated Depreciation, Depletion and Amortization                 (46,284)      (113,462)
                                                                          ----------      ---------
                                                                             147,089        186,403
   Furniture and Equipment, Net                                                2,086          1,408
                                                                          ----------      ---------
                                                                             149,175        187,811

OTHER ASSETS                                                                     100            233
                                                                          ----------      ---------
                                                                          $  161,959      $ 201,163
                                                                          ----------      ---------
                                                                          ----------      ---------
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
   Accounts Payable                                                       $    8,087      $  12,465
   Accrued Liabilities                                                        12,067         11,998
   Accrued Ad Valorem Taxes                                                    2,394          1,622
   Income Taxes Payable                                                           19              -
   Current Portion of Long-Term Debt                                             153            258
                                                                          ----------      ---------
                                                                              22,720         26,343

LONG-TERM DEBT, net of current portion                                        11,053         80,000
OTHER LONG-TERM OBLIGATIONS                                                      266            601
DEFERRED INCOME TAXES                                                          6,555              -
COMMITMENTS AND CONTINGENCIES (Note 5)
STOCKHOLDERS' EQUITY:
   Preferred Stock, Par Value $.01 Per Share; 10,000,000 Shares 
     Authorized, No Shares Issued and Outstanding                                  -              -
   Common Stock, $.01 Par Value, 50,000,000 Shares Authorized,
     13,833,000 and 14,151,000 Shares Issued, Respectively                       138            142
   Additional Paid-In Capital                                                110,627        113,136
   Retained Earnings (Accumulated Deficit)                                    12,012        (16,488)
   Common Stock Held In Treasury, At Cost, 120,000 and 186,000 
     Shares, Respectively                                                     (1,412)        (2,571)
                                                                          ----------      ---------
                                                                             121,365         94,219
                                                                          ----------      ---------
                                                                          $  161,959      $ 201,163
                                                                          ----------      ---------
                                                                          ----------      ---------

</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.

                                       34

<PAGE>

BASIN EXPLORATION, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
For the years ended December 31, (in thousands, except per share data)        1996            1997          1998
- -------------------------------------------------------------------------------------------------------------------
<S>                                                                       <C>             <C>             <C>

REVENUE:
   Oil Sales                                                              $   11,292      $   9,844       $   9,735
   Gas Sales                                                                   6,890         14,557          38,885
   Gain On Sale of Assets                                                     22,472              -               -
  Interest and Other                                                           1,009            319              79
                                                                          ----------      ---------       ---------
                                                                              41,663         24,720          48,699
                                                                          ----------      ---------       ---------
COSTS AND EXPENSES:
   Lease Operating Expenses                                                    4,776          4,600           8,276
   Production Taxes                                                            1,829          1,260             770
   Depreciation, Depletion, and Amortization                                   7,606         10,622          29,775
   General and Administrative, Net                                             3,850          3,694           4,380
   Interest and Other                                                          2,272            764           2,030
   Property Impairment                                                             -              -          38,500
                                                                          ----------      ---------       ---------
                                                                              20,333         20,940          83,731
                                                                          ----------      ---------       ---------

INCOME (LOSS) BEFORE INCOME TAXES                                             21,330          3,780         (35,032)
INCOME TAX (PROVISION) BENEFIT                                                (5,760)        (1,324)          6,532
                                                                          ----------      ---------       ---------
NET INCOME (LOSS)                                                         $   15,570      $   2,456       $ (28,500)
                                                                          ----------      ---------       ---------
                                                                          ----------      ---------       ---------
BASIC:
   Earnings (Loss) Per Share                                              $     1.45      $    0.22       $   (2.06)
   Weighted Average Shares Outstanding                                        10,700         11,228          13,859
DILUTED:
   Earnings (Loss) Per Share                                              $     1.45      $    0.22       $   (2.06)
   Weighted Average Shares Outstanding                                        10,730         11,345          13,859

</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.

                                       35

<PAGE>


BASIN EXPLORATION, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOW

<TABLE>
<CAPTION>
For the years ended December 31, (in thousands)                               1996            1997          1998 
- -------------------------------------------------------------------------------------------------------------------
<S>                                                                       <C>             <C>             <C>

CASH FLOWS FROM OPERATING ACTIVITIES:
   Net Income (Loss)                                                      $  15,570       $   2,456       $ (28,500)
     Adjustments To Reconcile Net Income (Loss)
        To Net Cash Provided By Operating Activities -
        Gain On Sale of Assets                                              (22,472)             --              --
        Depreciation, Depletion and Amortization                              7,606          10,622          29,775
        Deferred Income Tax Expense (Benefit)                                 4,760           1,795          (6,555)
        Property Impairment                                                      --              --          38,500
        Stock Compensation Expense                                               98             439             452
        Amortization of Debt Issuance Costs                                     118              --              --
        Other                                                                    --             (15)            (14)
   Changes In Operating Assets and Liabilities -
        Decrease (Increase) In -
            Restricted Cash                                                     578              --              --
            Receivables                                                       1,664          (3,188)         (1,693)
            Prepaids and Other                                               (1,861)         (1,438)            919
        (Decrease) Increase In -
            Accounts Payable and Accrued Liabilities                            103           5,692           5.406
            Ad Valorem Taxes and Other                                       (2,255)            107            (437)
            Income Taxes Payable                                              1,000            (981)            (19)
                                                                          ----------      ---------       ---------
   Net Cash Provided By Operating Activities                                  4,909          15,489          37,834
                                                                          ----------      ---------       ---------
CASH FLOWS FROM INVESTING ACTIVITIES:
   Capital Additions                                                        (27,741)        (98,245)       (107,716)
   Proceeds From Sale of Property and Equipment                             125,625             195              52
   Asset Sale Transaction Costs                                              (5,257)             --              --
                                                                          ----------      ---------       ---------
   Net Cash Provided By (Used In) Investing Activities                       92,627         (98,050)       (107,664)
                                                                          ----------      ---------       ---------
CASH FLOWS FROM FINANCING ACTIVITIES:
   Proceeds From Notes Payable and Long-Term Debt                             8,594          53,000          85,245
   Principal Payments On Notes Payable                                      (85,517)        (42,218)        (16,193)
   Proceeds From Sale of Stock, Net                                              84          50,320             629
   Purchase of Treasury Stock and Options                                      (287)            (33)            (51)
                                                                          ----------      ---------       ---------
   Net Cash Provided By (Used In) Financing Activities                      (77,126)         61,069          69,630
                                                                          ----------      ---------       ---------
INCREASE (DECREASE) IN CASH AND EQUIVALENTS                                  20,410         (21,492)           (200)
CASH AND EQUIVALENTS, Beginning of Year                                       1,613          22,023             531
                                                                          ----------      ---------       ---------
CASH AND EQUIVALENTS, End of Year                                          $ 22,023       $     531       $     331
                                                                          ----------      ---------       ---------
                                                                          ----------      ---------       ---------
SUPPLEMENTAL CASH FLOW INFORMATION:
   Cash Paid For Interest                                                  $  2,327       $     637       $   3,133
   Cash Paid For Taxes                                                     $     --       $     981       $     (23)

</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.

                                       36

<PAGE>


BASIN EXPLORATION, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

For the years ended December 31, 1996, 1997 and 1998 (in thousands)
- -------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                                                       Retained
                                                  Common Stock      Additional     Treasury Stock      Earnings
                                                 ---------------      Paid-In    -----------------   (Accumulated   Stockholders'
                                                 Shares   Amount      Capital    Shares     Amount     Deficit)        Equity    
                                                 ------   ------    ----------   ------     ------   ------------   -------------
<S>                                              <C>      <C>       <C>          <C>       <C>       <C>            <C>
BALANCES, December 31, 1995                      10,724    $ 107    $  59,288       (32)   $   (94)    $  (6,014)    $ 53,287
   Purchase of Treasury Stock
   and Options                                       --       --         (250)      (24)       (38)           --         (288)
   Issuance and Vesting of Restricted
     Stock and Stock Options                         33        1          181        --         --            --          182
   Net Income                                        --       --           --        --         --        15,570       15,570
                                                 ------    -----    ---------      ----    -------     ---------     --------
BALANCES, December 31, 1996                      10,757      108       59,219       (56)      (132)        9,556       68,751
   Issuance of Common Stock                       3,001       30       51,340        --         --            --       51,370
   Common Stock Offering Costs                       --       --         (499)       --         --            --         (499)
   Purchase of Treasury Stock                        --       --           --       (64)    (1,280)           --       (1,280)
   Issuance and Vesting of Restricted Stock          75       --          567        --         --            --          567
   Net Income                                        --       --           --        --         --         2,456        2,456
                                                 ------    -----    ---------      ----    -------     ---------     --------
BALANCES, December 31, 1997                      13,833      138      110,627      (120)    (1,412)       12,012      121,365
   Issuance of Common Stock                         130        2          627        --         --            --          629
   Exercise of warrants for Common Stock             79        1        1,107       (62)    (1,108)           --           --
   Purchase of Treasury Stock                        --       --           --        (4)       (51)           --          (51)
   Issuance and Vesting of Restricted Stock         109        1          775        --         --            --          776
   Net Income (Loss)                                 --       --           --        --         --       (28,500)     (28,500)
                                                 ------    -----    ---------      ----    -------     ---------     --------
BALANCES, December 31, 1998                      14,151    $ 142    $ 113,136      (186)   $(2,571)    $ (16,488)    $ 94,219
                                                 ------    -----    ---------      ----    -------     ---------     --------
                                                 ------    -----    ---------      ----    -------     ---------     --------

</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.

                                       37

<PAGE>

                  BASIN EXPLORATION, INC. AND SUBSIDIARIES
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(1)   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

           ORGANIZATION AND OPERATIONS - The consolidated financial 
statements include the financial statements of Basin Exploration, Inc. and 
its wholly owned subsidiaries (collectively referred to as "Basin" or the 
"Company"). Basin operates its business and reports its operations as one 
business segment. Basin is engaged in the exploration, development and 
production of natural gas and crude oil. The Company's principal producing 
area is offshore in the Gulf of Mexico. Basin, as operator of jointly-owned 
oil and gas properties, sells a significant amount of such production to 
certain major customers (see Note 8), and pays vendors for oil and gas 
services. Joint interest receivables are subject to collection under terms of 
operating agreements which generally provide lien rights.

           The accompanying financial statements present the operations of 
the Company on a consolidated basis. All significant intercompany accounts 
and transactions have been eliminated in consolidation. 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 and disclosure of contingent 
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.

           CASH EQUIVALENTS - Cash equivalents are comprised of highly liquid 
instruments with original maturities of three months or less. The total 
carrying amount of cash and equivalents approximates the fair value of such 
instruments.

           OIL AND GAS PROPERTIES - The Company follows the full cost method 
of accounting for oil and gas properties. Under this method, all costs 
associated with the development, exploration and acquisition of oil and gas 
properties are capitalized in the Company's one cost center (full cost pool), 
which is the continental United States including the Gulf of Mexico. Payroll 
and other internal costs capitalized include salaries and related fringe 
benefits paid to employees directly engaged in the acquisition, exploration 
and development of oil and gas properties as well as all other directly 
identifiable, internal costs associated with these activities. Payroll and 
other internal costs associated with production operations and general 
corporate activities are expensed in the period incurred. Future development, 
site restoration, dismantlement and abandonment costs, net of salvage values, 
are estimated on a property-by-property basis based on prevailing prices and 
are amortized to expense, along with the capitalized costs discussed above, 
using the unit-of-production method based upon actual production and 
estimates of proved reserve quantities. Accumulated depreciation, depletion 
and amortization is recorded on the balance sheet as a reduction to property, 
plant and equipment costs. The Company invests in unevaluated oil and gas 
properties and related assets for the purpose of future exploration for 
proved reserves. The costs of such assets are included in unproved oil and 
gas properties at the lower of cost or estimated fair market value and are 
not subject to amortization. Proceeds from sales of oil and gas properties 
are credited to the full cost pool with no gain or loss recognized unless 
such adjustments would significantly alter the relationship between 
capitalized costs and proved reserves of oil and gas.

           Under full cost accounting rules promulgated by the Securities and 
Exchange Commission, if net capitalized costs of oil and gas properties, less 
related deferred income taxes, exceed the full cost ceiling at the end of a 
fiscal quarter, the excess is charged to expense in that period. The full 
cost ceiling is calculated as the estimated present value of future net 
revenues from proved oil and gas reserves using a 10% discount factor and 
unescalated oil and gas prices as of the end of the period, or shortly 
thereafter, plus the book value of unproved oil and gas properties. 
Calculation of the full cost ceiling may be particularly sensitive to changes 
in expected production rates or the level of oil and gas prices, which may be 
volatile due to seasonal factors and other influences.

           The Company recognized a $38,500,000 non-cash impairment charge 
($30,750,000 after income tax) for the quarter ended December 31, 1998, based 
on a ceiling test calculation that utilized average realized prices of $10.23 
per barrel of oil and $1.87 per Mcf of natural gas. A decline in prices could 
result in a requirement that the Company recognize additional impairment 
expense in a future period.

           FURNITURE AND EQUIPMENT - Furniture and equipment are depreciated 
over estimated useful lives of four to seven years. Maintenance and repair 
costs are expensed as incurred.

                                       38

<PAGE>

           INCOME TAXES - The Company computes income taxes in accordance 
with Statement of Financial Accounting Standards ("SFAS") No. 109, 
"Accounting for Income Taxes." SFAS 109 requires an asset and liability 
approach which results in the recognition of deferred tax liabilities and 
assets for the expected future tax consequences of temporary differences 
between the carrying amounts and the tax bases of those assets and 
liabilities. SFAS 109 also requires the recording of a valuation allowance if 
it is more likely than not that some portion or all of a deferred tax asset 
will not be realized.

           HEDGING ACTIVITIES - The Company periodically enters into 
commodity derivative contracts and fixed-price physical contracts to manage 
its exposure to oil and gas price volatility. Commodity derivatives 
contracts, which are placed with major financial institutions or other 
counterparties of high credit quality that the Company believes are minimal 
credit risks, may take the form of futures contracts, swaps or options. The 
reference prices of these commodity derivatives contracts are based upon 
crude oil and natural gas futures which have a high degree of historical 
correlation with actual prices received by the Company. The Company accounts 
for its commodity derivatives contracts using the hedge (deferral) method of 
accounting. Under this method, realized gains and losses from the Company's 
price risk management activities are recognized in oil and gas revenue when 
the associated production occurs and the resulting cash flows are reported as 
cash flows from operating activities. Gains and losses from commodity 
derivatives contracts that are closed before the hedged production occurs are 
deferred until the production month originally hedged. In the event of a loss 
of correlation between changes in oil and gas reference prices under a 
commodity derivatives contract and actual oil and gas prices, a gain or loss 
would be recognized currently to the extent the commodity derivatives 
contract did not offset changes in actual oil and gas prices.

           The Company recognized a reduction in oil revenue of $480,000 and 
$144,000 under hedging agreements in 1996 and 1997, respectively. The Company 
recognized a reduction in gas revenue of $383,000 under hedging agreements in 
1997. The Company recognized increases in oil and gas revenue of $1,175,000 
and $2,357,000, respectively, under hedging agreements in 1998.

           As of February 24, 1999, the Company was a party to the following 
fixed price swap arrangements (one MMBtu approximates one Mcf of natural gas):

<TABLE>
<CAPTION>
                                      Oil                            Gas
                             -----------------------      --------------------------
                             Average Daily                Average Daily
Time Period                  Volume (Bbl)      $/Bbl      Volume (MMbtu)     $/MMbtu
- -----------                  -------------     -----      --------------     -------
<S>                          <C>               <C>        <C>                <C>
1/1/99 - 3/31/99                 1,000         17.00          30,167          2.15
4/1/99 - 6/30/99                 1,000         17.00          33,297          2.18
7/1/99 - 9/30/99                                              30,000          2.20
10/1/99 - 12/31/99                                            25,000          2.16
1/1/00 - 12/31/01                                             10,000          2.15

</TABLE>

           In addition, the Company periodically enters into spread trades or 
options transactions related to oil or natural gas futures markets. Under a 
spread trade, fixed prices under a hedging contract are determined in the 
future by reference to the price of an underlying contract. Such positions 
may enable the Company to lock in favorable fixed prices for future hedging 
positions, but can also result in unfavorable fixed price contracts if the 
reference price represented by the underlying contract declines. As of 
February 24, 1999, the Company had entered into spread trades for natural gas 
providing for a fixed price for 20,000 MMBtu per day for the period of March 
2000 through September 2000 to be established in the future upon an election 
by the Company by reference to the underlying NYMEX October 1999 contract 
price less $0.28. The Company also had sold call options for 10,000 MMBtu of 
natural gas per day for the period from March 1999 through April 1999 with a 
strike price of $1.93 per MMBtu, and from January 1999 through December 2001 
with an average strike price of $2.50 per MMBtu. Call options had also been 
sold covering a quantity of 1,000 barrels of oil per day for the period from 
July 1999 through December 1999, at a strike price of $16.75 per barrel.

           In accordance with SFAS 107, "Disclosures About Fair Value of 
Financial Instruments," the Company has estimated the fair value of its 
hedging arrangements at December 31, 1998, utilizing the then-applicable 
crude oil and natural gas strips. While it is not the Company's intention to 
terminate any of the arrangements, it is estimated that the Company would 
have 

                                       39

<PAGE>

received approximately $1,170,000 to terminate the then-existing arrangements 
on December 31, 1998. Due to the volatility of crude oil and natural gas 
prices, the fair market value may not be representative of the actual gain or 
loss that will ultimately be realized by the Company.

           In June 1998, the Financial Accounting Standards Board issued 
Statement of Financial Accounting Standards No. 133, "Accounting for 
Derivative Instruments and Hedging Activities" ("SFAS 133"). SFAS 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 market value and that changes in the 
derivative's fair market value be recognized currently in earnings unless 
specific hedge accounting criteria are met. SFAS 133 is effective for the 
Company in 2000, but early adoption is allowed. The Company has not yet 
quantified the impacts of adopting SFAS 133 or determined the timing or 
method of adoption. However, SFAS 133 could increase volatility in earnings 
and other comprehensive income.

           EARNINGS (LOSS) PER SHARE - The Company adopted SFAS 128, 
"Earnings Per Share," beginning with the fourth quarter of 1997. All prior 
period earnings per share have been restated to conform to the provisions of 
the statement. Basic earnings per share is computed based on the weighted 
average number of common shares outstanding. Diluted earnings per share is 
computed based on the weighted average number of common shares outstanding 
adjusted for the incremental shares attributed to outstanding options and 
warrants to purchase common stock. Options to purchase 171,500 and 30,000 
shares in 1996 and 1997, respectively, were not included in the computation 
of diluted earnings per share because the option exercise price was greater 
than the average market price of the Company's common stock. All options and 
warrants to purchase common shares were excluded from the computation of 
diluted earnings per share in 1998 because they were antidilutive as a result 
of the Company's net loss in that year.

           In connection with the acquisition of Sterling Energy Corp. in 
November 1994, the Company issued warrants to purchase 300,000 shares of the 
Company's common stock at an exercise price of $14.00 per share. Such 
warrants became exercisable on October 13, 1994 and have an expiration date 
of December 31, 1999. During 1997 and 1998, 48,523 and 79,145 warrants were 
exercised, respectively. The remaining 172,332 warrants were outstanding at 
December 31, 1998.

           COMPREHENSIVE INCOME - The Company adopted SFAS 130, 
"Comprehensive Income," beginning with the fourth quarter of 1997. There are 
no components of comprehensive income which have been excluded from net 
income and, therefore, no separate statement of comprehensive income has been 
presented.

(2)   ACQUISITIONS AND DIVESTITURES OF OIL AND GAS PROPERTIES

           In February 1996, the Company entered into agreements pursuant to 
which it sold all of its assets in the D-J Basin in two transactions closed 
in March and June 1996, respectively, for an aggregate sales price of 
$123,500,000, effective January 1, 1996. Combined, these transactions 
resulted in Basin selling its interests in approximately two-thirds of its 
producing wells and 70% of its proved oil and gas reserves at December 31, 
1995. The Company recognized a gain of $22,472,000 in conjunction with the 
second transaction. Revenue and expenses associated with the sold properties 
were included in the Company's results of operations through the respective 
closing dates.

           Basin consummated an acquisition of certain oil and gas properties 
from Midcon Offshore, Inc. on November 26, 1997. The purchase price was 
approximately $31,300,000, subject to normal post-closing adjustments. Basin 
was the high bidder at a bankruptcy court proceeding conducted to sell such 
assets, which were comprised principally of working interests in six federal 
lease blocks on the outer-continental shelf in the Gulf of Mexico, and the 
related platforms and production facilities. Approximately $5,000,000 of the 
purchase price was attributed to prospective drilling locations. The 
acquisition was accounted for as a purchase and, accordingly, the operating 
results of the acquired assets have been included in the Company's 
consolidated financial statements since the closing date.

                                       40

<PAGE>

(3)   LONG-TERM DEBT

<TABLE>
<CAPTION>
                                                 December 31,
                                            -----------------------
(in thousands)                                1997          1998
                                              ----          ----
<S>                                         <C>           <C>
Revolving Credit Facility                   $ 11,000      $ 80,000
Other Notes                                      206           258
                                            --------      --------
                                              11,206        80,258
           Less: Current Portion                (153)         (258)
                                            --------      --------
Long-Term Debt, Net of Current Portion      $ 11,053      $ 80,000
                                            --------      --------
                                            --------      --------

</TABLE>

           Effective January 1, 1999, the Company entered into an Amended and 
Restated Credit Agreement (the "Credit Agreement") with its existing bank 
group. The Credit Agreement provides for borrowings of up to $110,000,000 
under two combined facilities. Facility A, initially established at 
$90,000,000, represents the borrowing base that is considered to be 
"conforming" , based upon the bank's then-current customary practices and 
standards in making conventional borrowing base determinations for oil and 
gas producers. Such practices and standards are intended to be substantially 
similar to the bank group's present practices, except for market-induced 
changes relating to pricing, costs and risk factors related to oil and gas 
reserves. Facility B, initially established at $20,000,000, is a shorter-term 
supplemental line of credit. The Credit Agreement provides for the interest 
rate on borrowings to be determined by reference to the prime rate or LIBOR, 
at the Company's election. Facility A provides for a varying spread of 0% to 
0.25% to be added to the prime rate, or 0.75% to 1.5% to be applied to LIBOR, 
based upon the Company's facility usage ratio at the time. Facility B 
provides for a spread of 3.5% to be added to the prime rate or 4.75% to be 
applied to LIBOR, subject to a 0.25% increase in such spreads effective June 
1, 1999. The Credit Agreement provides for borrowings to be revolving loans 
until November 30, 2001, at which time the outstanding balance will be 
converted into a four-year amortizing term loan unless the Credit Agreement 
has been amended to extend the revolving period, and subject to the scheduled 
termination of Facility B effective May 31, 2000. The borrowing base under 
the Credit Agreement is scheduled to be re-determined as of March l, 1999 and 
generally at three-month intervals thereafter until Facility B is retired, 
and then at six-month intervals until converted into a term loan. The Credit 
Agreement contains various covenants, including ones that could limit the 
Company's ability to incur other debt, dispose of assets, pay dividends, or 
repurchase stock. Pursuant to the agreement governing the Credit Agreement, 
substantially all of the Company's producing properties are subject to 
mortgages in favor of the banks and the Company's remaining properties are 
subject to a negative pledge. The weighted average interest rate on 
borrowings outstanding under the Credit Agreement at December 31, 1998 was 
6.2%.

Outstanding debt at December 31, 1998 is payable as follows (in thousands):

<TABLE>
<S>                          <C>
1999                         $    258
2000                               --
2001                               --
2002                           20,000
2003                           20,000
Thereafter                     40,000
                             --------
                             $ 80,258
                             --------
                             --------
</TABLE>

(4)   BENEFIT PLANS

           401(k) SAVINGS - The Company has a 401(k) profit sharing plan (the 
"Plan"). Eligible employees may make voluntary contributions to the Plan, 
which may be matched by the Company, at its discretion, up to 6 percent of 
the employee's eligible compensation. The Company has historically matched 
the first three percent of employees' eligible compensation that is 
contributed under the Plan. The amount of employee contributions is limited 
as specified in the Plan. At its discretion, the Company may also make 
additional contributions to the Plan. The Company expensed $96,000, $183,000 
and $208,000, with respect to the Plan for the years ended December 31, 1996, 
1997 and 1998, respectively.

           STOCK PLAN - Under the Company's Equity Incentive Plan, officers, 
key employees, consultants and directors of the Company are eligible to 
receive incentive stock options, non-qualified stock options, restricted 
stock and performance shares. The restricted stock and performance shares 
awarded under the plan entitle the grantee to the rights of a shareholder, 
including the right to receive any dividends and to vote such shares, but the 
shares are restricted as to sale, transfer or encumbrance. 

                                       41

<PAGE>

At December 31, 1998, a total of approximately 1,758,000 shares were 
available for grant under the plans. Options granted generally vest over 
three to four years, and expire after ten years. A total of 1,175,000 shares 
of the Company's common stock are subject to such plans as of December 31, 
1998, including 186,000 non-vested shares of restricted stock and performance 
shares and 989,000 outstanding stock options.

The following table summarizes stock options activity for the years presented:

<TABLE>
<CAPTION>
                                             Year Ended December 31,
                                       ------------------------------------
                                          1996          1997        1998
                                       ---------     --------     ---------
<S>                                    <C>           <C>          <C>
Balance, Beginning of Period            702,500      649,000       773,500
Granted                                 252,500      202,500       345,000
Exercised                               (33,500)     (78,000)     (129,500)
Forfeited/Canceled                     (272,500)          --            --
                                       --------      -------      --------
Balance, End of Period                  649,000      773,500       989,000
                                       --------      -------      --------
                                       --------      -------      --------

</TABLE>

Additional information regarding outstanding options at December 31, 1998 is 
as follows:

<TABLE>
<CAPTION>

    Range of           Number of         Weighted         Weighted Average       Number of        Weighted
 Exercise Prices       Options           Average           Remaining Life        Options          Average
    Per Share        Outstanding      Exercise Price         in Years          Exercisable     Exercise Price
- -----------------    -----------      --------------      ----------------     -----------     --------------
<S>                  <C>              <C>                 <C>                  <C>             <C>
$ 13.25 - $ 20.38      464,000           $ 15.48               8.0               109,000          $ 16.13
$  7.63 - $ 11.00      165,000           $  9.64               4.4               131,667          $  9.52
$  5.13 - $  7.00      215,000           $  6.32               7.6               138,333          $  6.15
$  3.88 - $  4.94      145,000           $  4.27               7.1               100,833          $  4.21
                       -------           -------               ---               -------          -------
                       989,000           $ 10.87               7.0               479,833          $  8.94
                       -------           -------               ---               -------          -------
                       -------           -------               ---               -------          -------

</TABLE>

           The Company granted 25,000, 23,000 and 59,000 shares of restricted 
stock during 1996, 1997 and 1998, respectively. Related compensation expense 
was recognized in the amounts of approximately $98,000, $120,000 and $409,000 
for the years ended December 31, 1996, 1997, and 1998, respectively. 
Cumulatively through December 31, 1998, 73,000 shares of restricted stock had 
been forfeited, 53,000 shares were no longer subject to restriction, and 
81,000 shares of restricted stock remained subject to forfeiture.

           The Company granted 55,000 and 50,000 performance shares during 
1997 and 1998, respectively. In order for the performance shares to be 
released to the grantee, the Company must attain certain performance goals by 
the end of a three-year performance cycle which begins with the year of 
award. Related compensation expense was recognized in the amount of $447,000 
and $367,000 for the years ended December 31, 1997 and 1998, respectively.

           In October 1995, the Financial Accounting Standards Board issued 
SFAS 123, "Accounting for Stock-Based Compensation." SFAS 123 is effective 
for 1996 and after and recommends a fair value based method of accounting for 
employee stock compensation, including stock options. However, companies may 
choose to account for stock compensation using the intrinsic value based 
method as prescribed by Accounting Principles Board Opinion No. 25, 
"Accounting for Stock Issued to Employees," and provide pro forma disclosures 
of net income and earnings per share as if the fair value based method had 
been applied. The Company has elected to continue to account for stock 
compensation using the intrinsic value based method.

                                       42

<PAGE>

           Had the Company elected to follow SFAS 123, the fair value of each 
option grant would have been estimated on the date of grant using the 
Black-Sholes option-pricing model with the following weighted-average 
assumptions and effects:

<TABLE>
<CAPTION>
                                                  Year Ended December 31,
                                       --------------------------------------
                                          1996         1997         1998
                                       --------     --------     ---------

<S>                                    <C>          <C>          <C>
Assumptions:
   Risk Free Interest Rate                6.75%        5.75%         5.75%
   Expected Dividend Yield                   0%           0%            0%
   Expected Life in Years                    5            5             5
   Expected Volatility                      55%          58%           58%
Weighted Average
   Fair Value Per Share                $  2.73      $  5.66      $   8.40
Pro Forma Net Income
   (Loss)(in thousands)                $15,468      $ 2,285      $(29,315)
Pro Forma Diluted Earnings
   (Loss) Per Share                    $  1.44      $  0.20      $  (2.12)

</TABLE>

(5)   COMMITMENTS AND CONTINGENCIES

           LEASES - The Company is the primary obligor under various 
noncancelable office space operating lease arrangements. The Company also 
subleases certain office space to and from third parties under various 
noncancelable lease arrangements. The following is a schedule of future 
minimum lease payments under these leases at December 31, 1998:

<TABLE>
<CAPTION>
             Future minimum        Future minimum
            lease obligations      lease receipts
            -----------------      --------------
(in thousands)
<S>         <C>                    <C>
1999             $  596                  $ 186
2000                136                     --
                 ------                  -----
                 $  732                  $ 186
                 ------                  -----
                 ------                  -----

</TABLE>

           Payments related to these lease obligations were approximately 
$707,000, $990,000 and $1,096,000 for the years ended December 31, 1996, 1997 
and 1998, respectively. Related receipts were $89,000, $502,000 and $506,000 
in the years ended December 31, 1996, 1997 and 1998.

           LEGAL PROCEEDINGS - The Company, from time to time, is involved in 
various legal and administrative proceedings and claims of various types 
which arise in the ordinary course of its business. While any litigation 
contains an element of uncertainty, in the opinion of management, none of 
these actions, either individually or in the aggregate, are likely to have a 
material adverse effect on the Company's financial condition, liquidity or 
results of operations.

                                       43

<PAGE>

(6)   INCOME TAXES

           The components of the provision (benefit) for income taxes are as 
follows:

<TABLE>
<CAPTION>
                                            Year Ended December 31,
                                       ---------------------------------
(in thousands)                          1996         1997         1998
                                       -------     -------      --------
<S>                                    <C>         <C>          <C>
Current Provision (Benefit):
   Federal                             $   950     $  (434)     $    (58)
   State                                    50         (37)           81
                                       -------     -------      --------
                                         1,000        (471)           23
                                       -------     -------      --------
Deferred Provision (Benefit):
   Federal                               4,760       1,795        (6,555)
   State                                    --          --            --
                                       -------     -------      --------
                                         4,760       1,795        (6,555)
                                       -------     -------      --------
Provision (Benefit)
   For Income Taxes                    $ 5,760     $ 1,324      $ (6,532)
                                       -------     -------      --------
                                       -------     -------      --------

</TABLE>

           Reconciliations of income tax provisions (benefit) computed at the 
federal statutory rate with income tax provisions recorded by the Company for 
each of the past three years are as follows:

<TABLE>
<CAPTION>
                                            Year Ended December 31,
                                       ---------------------------------
(in thousands)                          1996         1997         1998
                                       -------     -------      --------
<S>                                    <C>         <C>          <C>
Income (Loss) Before Income Taxes      $21,330     $ 3,780      $(35,032)
Computed Tax (Benefit) at The 
  Applicable Federal Statutory Rate    $ 7,252     $ 1,285      $(11,911)
State Income Tax (Benefit),
  Net of Federal Tax Effect                704          39          (350)
Deferred Tax 
  Assets Valuation Allowance            (2,196)          -         5,729
                                       -------     -------      --------
Income Tax Provision (Benefit)         $ 5,760     $ 1,324      $ (6,532)
                                       -------     -------      --------
                                       -------     -------      --------

</TABLE>

           The tax effects of significant temporary differences representing 
deferred tax assets and liabilities are as follows:

<TABLE>
<CAPTION>
                                                        December 31,
                                                   ---------------------
(in thousands)                                       1997         1998
                                                   --------     --------
<S>                                                <C>          <C>
Deferred Tax (Assets) Liabilities:
   Oil and Gas Properties
       and Equipment                               $  7,581     $ (2,357)
   Net Operating Loss Carryforward                        -       (2,505)
   Percentage Depletion Carryforward                      -         (589)
   Alternative Minimum Tax
       Credit Carryforward                           (1,026)        (278)
   Valuation Allowance                                    -        5,729
                                                   --------     --------
Net Deferred Tax Liability                         $  6,555     $      -
                                                   --------     --------
                                                   --------     --------

</TABLE>

(7)   RELATED PARTY TRANSACTIONS

           Prior to its initial public offering, the Company advanced 
$559,000 to its principal stockholder at an annual interest rate of 9 
percent. Pursuant to the terms of the note, the principal stockholder elected 
to surrender 28,217 shares of Basin's common stock to the Company in the 
fourth quarter of 1997 to settle the note. The surrendered shares are 
reflected as treasury stock in the accompanying statement of changes in 
stockholders' equity. 

                                       44

<PAGE>

(8) OIL AND GAS ACTIVITIES

            The Company's oil and gas operations are conducted solely in the 
United States. Certain information concerning these activities follows:

           MAJOR PURCHASERS - The following parties purchased ten percent or 
more of the Company's oil and gas production:

<TABLE>
<CAPTION>
                                          Year Ended December 31,
                                       ---------------------------
Purchaser                               1996       1997      1998
- ---------                              ------     ------    ------
<S>                                    <C>        <C>       <C>
Texaco                                    (a)     46%       28%
Dynegy                                    (a)       (a)     26%
Eighty-Eight Oil                        26%       21%         (a)
PanEnergy                               43%         (a)       (a)

</TABLE>

(a) less than ten percent

           COSTS INCURRED - Costs incurred in oil and gas operations and 
related depletion per equivalent  unit-of- production were as follows:

<TABLE>
<CAPTION>
                                                                  Year Ended December 31,
                                                                ---------------------------
(in thousands, except for gas equivalent data)                   1996       1997      1998
                                                                ------     ------    ------
<S>                                                             <C>        <C>       <C>
Property Acquisition-
   Unproved(1)                                                  $ 5,056    $ 11,057  $ 22,920
   Proved                                                         3,067      48,680     3,018
Exploration Costs                                                10,250      27,995    58,063
Development Costs                                                 4,472      17,901    22,671
                                                                -------    --------   -------
Gross Expenditures                                              $22,845    $105,633  $106,672
                                                                -------    --------   -------
                                                                -------    --------   -------
Depletion Per One Thousand
   Cubic Feet of Gas Equivalent                                 $  0.82    $   1.12  $   1.31
                                                                -------    --------   -------
                                                                -------    --------   -------

</TABLE>

(1) Excludes $4,914,000, $1,113,000 and $150,000 of costs recouped through 
the resale of partial interests in prospects to industry partners in 1996, 
1997 and 1998, respectively.

           COSTS NOT BEING AMORTIZED - Oil and gas property costs not being 
amortized at December 31, 1998, consisted of $34,039,000 of leasehold and 
seismic costs, of which $2,669,000, $3,312,000 and $28,058,000 were incurred 
in 1996, 1997 and 1998, respectively. The Company anticipates that 
substantially all unevaluated costs will be classified as evaluated costs 
within three years.

UNAUDITED SUPPLEMENTAL OIL AND GAS RESERVE INFORMATION

           There are numerous uncertainties inherent in estimating quantities 
of proved reserves and projected future rates of production and timing of 
development expenditures, including many factors beyond the control of the 
producer. The reserve data and standardized measures set forth herein 
represent only estimates. Reserve engineering is a subjective process of 
estimating underground accumulations of oil and gas that cannot be measured 
in an exact way, and 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 
often vary. In addition, results of drilling, testing and production 
subsequent to the date of an estimate may justify revision of such estimate. 
Accordingly, reserve estimates will vary from the quantities of oil and gas 
that are ultimately recovered. Further, the estimated future net revenues 
from proved reserves and the present value thereof are based upon certain 
assumptions, including geologic success, and future prices, production levels 
and costs, that may not prove correct over time. Predictions of future 
production levels are subject to great uncertainty, and the meaningfulness of 
such estimates is highly dependent upon the accuracy of the assumptions upon 
which they are based. Oil and gas prices have fluctuated widely in recent 
years. The calculated weighted average sales prices utilized for the purposes 
of estimating the 

                                       45

<PAGE>

Company's proved reserves and future net revenue were: $25.35 per barrel of 
oil and $3.02 per Mcf of gas at December 31, 1996; $16.34 per barrel of oil 
and $2.32 per Mcf of gas at December 31, 1997 and $10.31 per barrel of oil 
and $1.99 per Mcf of gas at December 31, 1998. Estimated reserve quantities 
and standardized measures set forth herein utilize such prices (which were 
based on prevailing sales prices at the time) held constant in future periods 
and a 10% discount rate.

           All of the Company's reserves are located onshore or offshore in 
the United States. The following tables include estimates for the Company's 
onshore and offshore reserves combined. Estimates of onshore reserves were 
prepared by the Company's engineers and audited by Netherland, Sewell & 
Associates, Inc. at December 31, 1995, 1996 and 1997 and by Ryder Scott 
Company Petroleum Engineers at December 31, 1998. Estimates of offshore 
reserves were either prepared by Ryder Scott Company Petroleum Engineers, or 
prepared by the Company's engineers and audited by Ryder Scott Company 
Petroleum Engineers.

                                       46

<PAGE>

ANALYSES OF CHANGES IN PROVED RESERVES

           The following table sets forth information regarding the Company's 
estimated net total proved and proved developed oil and gas reserve 
quantities:

<TABLE>
<CAPTION>
                                                       OIL                GAS
                                                      (MBbls)            (MMcf)
                                                      ------            ---------
<S>                                                   <C>               <C>
Balance, December 31, 1995                            12,606              131,436
   Revisions                                              52                 (451)
   Extensions, Discoveries and Additions                  49                6,391
   Production                                           (564)              (4,776)
   Sales of Reserves In-place                         (6,559)            (104,140)
   Purchases of Reserves In-place                      2,286                1,253
                                                      ------            ---------
Balance, December 31, 1996                             7,870               29,713
   Revisions                                          (1,439)              (6,488)
   Extensions, Discoveries and Additions               1,458               32,911
   Production                                           (524)              (5,509)
   Sales of Reserves In-place                            (56)              (1,015)
   Purchases of Reserves In-place                        845               39,922
                                                      ------            ---------
Balance, December 31, 1997                             8,154               89,534
   Revisions                                          (1,486)              (6,136)
   Extensions, Discoveries and Additions               2,057               57,888
Production                                              (725)             (17,616)
   Purchases of Reserves In-place                        667                3,832
                                                      ------            ---------
Balance, December 31, 1998                             8,667              127,502
                                                      ------            ---------
                                                      ------            ---------
Proved Developed Reserves -
   December 31, 1996                                   4,046               19,182
   December 31, 1997                                   4,863               82,571
   December 31, 1998                                   3,352              103,271

</TABLE>

STANDARDIZED MEASURE

   The following table presents the standardized measure of discounted future 
net cash flows related to proved oil and gas reserves:


<TABLE>
<CAPTION>
                                                                          December 31,
                                                                -------------------------------
(in thousands)                                                    1996         1997        1998
                                                                 ------       ------      ------
<S>                                                             <C>          <C>         <C>
Future Production Revenues                                      $ 289,105    $ 341,310   $342,618
Future Production Costs                                          (108,522)     (79,550)   (71,609)
Future Development Costs                                          (20,583)     (40,829)   (54,905)
Future Income Taxes                                               (39,101)     (31,723)   (17,894)
                                                                ---------    ---------   --------
Future Net Cash Flows                                             120,899      189,208    198,210
Discount Factor at 10% Per Annum                                  (57,593)     (53,726)   (48,255)
                                                                ---------    ---------   --------
Standardized Measure
   of Discounted Future
   Net Cash Flows(1)                                            $  63,306    $ 135,482   $149,955
                                                                ---------    ---------   --------
                                                                ---------    ---------   --------

</TABLE>

(1) Total future net cash flows before income taxes  discounted at 10% per 
annum are  $83,656,000,  $160,230,000  and $164,485,000 as of December 31, 
1996, 1997 and 1998, respectively.

           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.

                                       47

<PAGE>

           A summary of changes in the standardized measure of discounted 
future net cash flows is as follows:

<TABLE>
<CAPTION>
                                                                    Year Ended December 31,
                                                                -------------------------------
(in thousands)                                                    1996         1997        1998
                                                                 ------       ------      ------
<S>                                                             <C>          <C>         <C>
Standardized Measure of Discounted Future
   Net Cash Flows, Beginning of Year                            $117,248     $ 63,306    $135,482
Changes in Sales Prices and Production Costs                      17,693      (34,217)    (51,857)
Changes in Estimated Future
   Development Costs                                              (1,819)       6,973       3,061
Sales of Minerals-in-place                                       (83,530)      (1,019)         --
Purchase of Minerals-in-place                                     10,887       65,644       7,537
Revisions of Previous Quantity Estimates                            (169)     (11,065)     (9,015)
Costs Incurred That Reduced Future
   Development Costs                                                 --         2,253         474
Extensions, Discoveries and Improved Recovery                     16,286       67,973      91,660
Sales of Oil and Gas, Net of Production
   Costs and Taxes                                               (11,577)     (18,541)    (39,574)
Accretion of Discount                                             12,907        8,366      16,023
Net Change in Future Income Taxes                                 (8,530)      (4,398)     10,218
Changes in Timing Of Production and Other                         (6,090)      (9,793)    (14,054)
                                                                ---------    ---------   --------
Standardized Measure of Discounted Future
   Net Cash Flows, End of Year                                  $ 63,306     $135,482    $149,955
                                                                ---------    ---------   --------
                                                                ---------    ---------   --------

</TABLE>

UNAUDITED SUPPLEMENTAL QUARTERLY FINANCIAL DATA

<TABLE>
<CAPTION>
(in thousands, except per share amounts)
                                             First              Second        Third         Fourth         Total
                                             -----              ------        -----         ------         -----
<S>                                         <C>              <C>              <C>           <C>           <C>
1997
Revenue                                       $ 3,412          $ 2,566         $ 6,906       $ 11,836      $ 24,720
Gross Profit From Operations                    1,814            1,269           5,589          9,869        18,541
Net Income (Loss)                                   9             (570)            966          2,051         2,456
Earnings (Loss) Per Share:
   Basic                                           --            (0.05)           0.09           0.16          0.22
   Diluted                                         --            (0.05)           0.09           0.16          0.22
1998
Revenue                                       $10,256          $11,908         $14,144        $12,391       $48,699
Gross Profit From Operations                    7,858            9,262          11,932         10,522        39,574
Net Income (Loss)                                 239              746           1,242        (30,727)      (28,500)
Earnings (Loss) Per Share:
   Basic                                         0.02             0.05            0.09          (2.21)        (2.06)
   Diluted                                       0.02             0.05            0.09          (2.21)        (2.06)

</TABLE>

Gross profit from operations is comprised of oil and gas sales less lease 
operating expenses and production taxes. The net loss for the fourth quarter 
of 1998 includes a property impairment of $38,500,000. Earnings (loss) per 
share is computed independently for each of the quarters presented and, 
therefore, may not sum to the totals for the year.

                                       48

<PAGE>

   (a)(3) Exhibits

<TABLE>
<CAPTION>
   EXHIBIT
   NUMBER                                          DESCRIPTION OF EXHIBITS
   ------                                          -----------------------
<S>                 <C>
        2.1    --   Agreement and Plan of Merger between Sterling Energy Corporation, 
                    Basin Energy, Inc. and Basin Exploration, Inc. dated October 13, 1994(5)
        2.2    --   Plan of Merger between Basin Sterling, Inc. and Basin Exploration, Inc. 
                    dated November 22, 1994(5)
        2.3    --   Plan of Merger between Basin Operating Company and Basin Exploration, Inc. 
                    dated December 14, 1994(7)
        3.1    --   Restated Certificate of Incorporation of Basin.(2)
        3.2    --   Restated Bylaws of Basin.(2)
        4.1    --   Common Stock Certificate of Basin.(2)
       10.1    --   Equity Incentive Plan as amended May 5, 1998.(14)
       10.3    --   Key Employee Participation Plan.(2)
       10.4    --   Employment Agreement dated March 31, 1992 by and between Basin and Michael S. Smith.(3)
       10.5    --   Gulf Coast Geoscientist Overriding Royalty Interest Plan dated November 30, 1995.(9)
       10.6    --   Form of Rights Agreement dated as of February 24, 1996, between Basin 
                    Exploration, Inc. and Corporate Stock Transfer, Inc. as Rights Agent.(8)
       10.7    --   Performance Shares Plan approved February 4, 1997.(10)
       10.8    --   Change of Control Employment Agreement dated October 13, 1995 between Basin
                    Exploration, Inc. and Howard L. Boigon.(9)
       10.9    --   Employment Agreement dated August 28, 1995 between Basin Exploration, Inc. 
                    and Samuel D. Winegrad.(9)
       10.10   --   Employment Agreement dated June 28, 1995 between Basin Exploration, Inc. 
                    and Neil L. Stenbuck.(9)
       10.11   --   Employment Agreement dated November 10, 1995 between Basin Exploration, Inc. 
                    and David A. Pustka.(9)
       10.12   --   Employment Agreement dated February 23, 1996 between Basin Exploration, Inc. 
                    and Thomas J. Corley.(10)
       10.13   --   Assignment and Assumption of Lease dated December 18, 1995 by and between 
                    Team, Inc., as original Tenant, Basin Exploration, Inc., as New Tenant, and 
                    FC Tower Property Partners, L.P., as Landlord.(8)
       10.16   --   Lease of Office Space dated September 25, 1992, between Brookfield Republic Inc. 
                    and Basin Operating Company, as amended(4)+
       10.17   --   First Lease of Additional Office Space dated as of December 1, 1994, between 
                    Brookfield  Republic, Inc. and Basin Operating Company.(6)+
       10.18   --   Purchase and Sale Agreement dated February 13, 1997, between Hall-Houston Oil 
                    Company et al as Sellers and Basin Exploration, Inc. as Buyer.(10)+
       10.19   --   First Amendment of Amended and Restated Credit Agreement dated August 6, 1996 
                    between the Company and Colorado National Bank, Union Bank of California, N.A. 
                    and NationsBank of Texas, N.A. dated June 11, 1997.(11)
       10.20   --   Order of the United States Bankruptcy Court for the Southern District of Texas 
                    Corpus Christi Division, dated November 18, 1997, with exhibits, including the 
                    Agreement of Purchase and Sale.(12)
       10.21   --   Second Amendment of Amended and Restated Credit Agreement dated August 6, 1996 
                    between the Company and Colorado National Bank, Union Bank of California, N.A. 
                    and NationsBank of Texas, N.A. dated November 1, 1997.(13)
       10.22   --   Third Amendment of Amended and Restated Credit Agreement dated August 6, 1996 
                    between the Company and U.S. Bank National Association, Union Bank of 
                    California, N.A. and NationsBank of Texas, N.A. dated April 30, 1998.(14)
       10.23   --   Fourth Amendment of Amended and Restated Credit Agreement dated August 6, 1996 
                    between the Company and U.S. Bank National Association, Union Bank of 
                    California, N.A. and Nationsbank, N.A., dated August 20, 1998.(15)
       10.24   --   Amended and Restated Credit Agreement dated January 1, 1999 among the Company and  
                    Nationsbank, N.A., U.S. National Association and Union Bank of California, N.A.(1)
       10.25   --   Employment Agreement dated January 28, 1999, between Basin Exploration, Inc. and Patrick A. Jackson.(1)
       10.26   --   Employment Agreement dated February 1, 1999, between Basin Exploration, Inc. and David A. Pustka.(1)

</TABLE>

                                       49

<PAGE>

<TABLE>
<S>                 <C>

       21      --   Subsidiaries.(1)
       23.1    --   Consent of Arthur Andersen LLP.(1)
       23.2    --   Consent of Ryder Scott Company.(1)
       27      --   Financial Data Schedule.(1)

</TABLE>

- -------------------
 (1)   Filed herewith.

 (2)   Filed as an Exhibit to Basin's Registration Statement on Form S-1 as 
       filed on March 17, 1992, Registration No. 33-46486, and incorporated 
       herein by reference.

 (3)   Filed as an Exhibit to Amendment No. 1 to Basin's Registration 
       Statement on Form S-1 as filed on April 21, 1992, Registration No. 
       33-46486, and incorporated herein by reference.

 (4)   Filed as an Exhibit to Basin's Registration Statement on Form S-1 as 
       filed on October 25, 1993, Registration No. 33-70802, and incorporated 
       herein by reference.

 (5)   Filed as an Exhibit to Form 8-K filed on December 10, 1994, and 
       incorporated herein by reference.

 (6)   Filed as an Exhibit to Form 10-K/A-1 filed on June 26, 1995 and 
       incorporated herein by reference.

 (7)   Filed as an Exhibit to Form 10-K filed on March 28, 1995, and 
       incorporated herein by reference.

 (8)   Filed as an Exhibit to Form 8-K filed on February 26, 1996, and 
       incorporated herein by reference.

 (9)   Filed as an Exhibit to Form 10-K filed on March 28, 1996, and 
       incorporated herein by reference.

(10)   Filed as an Exhibit to Form 10-K filed on March 31, 1997, and 
       incorporated herein by reference.

(11)   Filed as an Exhibit to Form 10-Q filed on August 12, 1997, and 
       incorporated herein by reference.

(12)   Filed as an Exhibit to Form 8-K filed on December 11, 1997, and 
       incorporated herein by reference.

(13)   Filed as an Exhibit to Form 10-K filed on March 31, 1998, and 
       incorporated herein by reference.

(14)   Filed as an Exhibit to Form 10-Q filed on May 14, 1998, and 
       incorporated herein by reference.

(15)   Filed as an Exhibit to Form 10-Q filed on November 13, 1998, and 
       incorporated herein by reference.

+      Confidential treatment has been granted for portions of these Exhibits.


  (b) Reports on Form 8-K

             None.

                                       50

<PAGE>

                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the 
registrant has duly caused this report to be signed on its behalf by the 
undersigned, thereunto duly authorized.


                                       BASIN EXPLORATION, INC.


                                       By: /s/ MICHAEL S. SMITH
                                          ---------------------------
Date: March 29, 1999                      Michael S. Smith
                                          PRESIDENT, CHIEF EXECUTIVE OFFICER
                                          AND CHAIRMAN OF THE BOARD

Pursuant to the requirements of the Securities Exchange Act of 1934, this 
report has been signed below by the following persons in the capacities and 
on the dates indicated.

     Signature                        Title                             Date
     ---------                        -----                             ----

 /s/ MICHAEL S. SMITH        President, Chief Executive           March 29, 1999
- ------------------------     Officer and Chairman of the
   Michael S. Smith          Board (Principal Executive Officer)

 /s/ HOWARD L. BOIGON        Vice President - General Counsel,    March 29, 1999
- ------------------------     Secretary and Director
   Howard L. Boigon          


 /s/ NEIL L. STENBUCK        Vice President, Chief Financial      March 29, 1999
- ------------------------     Officer and Director
   Neil L. Stenbuck          


  /s/ JAMES A. TUELL         Controller, Principal Accounting     March 29, 1999
- ------------------------     Officer
    James A. Tuell           

/s/ DONALD H. ANDERSON       Director                             March 29, 1999
- ------------------------
  Donald H. Anderson

  /s/ JOHN F. GREENE         Director                             March 29, 1999
- ------------------------
    John F. Greene

 /s/ J. PAUL HELLSTROM       Director                             March 29, 1999
- ------------------------
   J. Paul Hellstrom

/s/ MICHAEL A. NICOLAIS      Director                             March 29, 1999
- ------------------------
  Michael A. Nicolais

 /s/ LARRY D. UNRUH          Director                             March 29, 1999
- ------------------------
   Larry D. Unruh


                                       51


<PAGE>

                       AMENDED AND RESTATED CREDIT AGREEMENT

          THIS AMENDED AND RESTATED CREDIT AGREEMENT, dated as of January 1, 
1999, is by and among BASIN EXPLORATION, INC., a Delaware corporation 
("Borrower"), NATIONSBANK, N.A. ("NBNA"), a national banking association, 
U.S. BANK NATIONAL ASSOCIATION ("USB"), a national banking association, and 
UNION BANK OF CALIFORNIA, N.A., a national banking association ("Union").  
Each of NBNA, USB and Union shall act hereunder as a lender with respect to 
the Loan, as more fully described below; NBNA shall act hereunder as agent, 
on behalf of NBNA, USB and Union, with respect to the Loan, as more fully 
described below; and NBNA shall act as collateral agent, on behalf of NBNA, 
USB and Union, with respect to the Security Documents and any other 
collateral for the Loan, as more fully described below.

                                      RECITALS

          A.  Borrower, NBNA's predecessor, USB and Union entered into an 
Amended and Restated Credit Agreement dated as of August 6, 1996, as the same 
has heretofore been amended (the "Prior Credit Agreement"), in order to set 
forth the terms upon which USB, Union and NBNA's predecessor would make loans 
to Borrower and issue letters of credit at the request of Borrower and by 
which such loans and letters of credit would be governed.

          B.  Borrower, NBNA, USB and Union wish to enter into this Amended 
and Restated Credit Agreement in order to amend and restate in their entirety 
the terms and provisions of the Prior Credit Agreement and to provide for the 
terms upon which NBNA, USB and Union will make loans to Borrower and issue 
letters of credit at the request of Borrower and by which such loans and 
letters of credit will be governed.

                                     AGREEMENT

          NOW, THEREFORE, in consideration of the premises and the mutual 
covenants and agreements contained herein, the parties hereto agree as 
follows:

                                     ARTICLE I

                             DEFINITIONS AND REFERENCES

          Section 1.1.  DEFINED TERMS.  As used in this Agreement, each of the
following terms has the meaning given 

<PAGE>

it in this Section 1.1 or in the recitals, sections and subsections referred 
to below:

          "ADVANCE" means any advance to be made to Borrower pursuant to 
Article II hereof.

          "AFFILIATE" means, as to any Person, each other Person that 
directly or indirectly (through one or more intermediaries or otherwise) 
controls, is controlled by, or is under common control with, such Person.

          "AGENT" means NBNA, in its capacity as agent for Lenders hereunder 
and any successor Agent appointed and accepting such appointment as described 
in Article VIII below.

          "AGREEMENT" means this Amended and Restated Credit Agreement.

          "ALTERNATE BASE RATE" means: (a) for any Business Day, the greater 
of: (1) the Federal Funds Rate for such Business Day, plus 0.50 percentage 
points per annum, or (2) the Base Rate in effect as of the close of business 
on such Business Day; and (b) for any day which is not a Business Day, the 
"Alternate Base Rate" for the immediately preceding Business Day.

          "AMORTIZATION PERIOD" means the time period commencing upon the 
termination of the Revolving Period and ending four years thereafter.

          "AUTHORIZED OFFICER" means, with respect to any act to be performed 
or duty to be discharged by or on behalf of any Person who is not an 
individual, any partner, officer, agent or representative thereof who is at 
the time in question authorized to perform such act or discharge such duty on 
behalf of such Person.

          "BASE RATE" means the rate of interest established by Agent from 
time to time as its "prime rate". Such rate is set by Agent as a general 
reference rate of interest, taking into account such factors as it may deem 
appropriate, it being understood that many of Agent's commercial or other 
loans are priced in relation to such rate, that it is not necessarily the 
lowest or the best rate actually charged to any customer, that it may not 
correspond with further increases and decreases in interest rates charged by 
other lenders or market rates in general and that Agent may make various 
commercial or other loans at rates of interest having no relationship to such 
rate.

                                       2

<PAGE>

          "BASE RATE PORTION" means any portion of the unpaid principal 
balance of the Loan which is not a Fixed Rate Portion.

          "BASE RATE SPREAD" means: (a) as to that portion of the Loan 
included in Facility A: (1) for any and all days as to which the Usage Ratio 
is less than or equal to 90 percent, 0.00 percentage points per annum; and 
(2) for any and all days as to which the Usage Ratio is greater than 90 
percent, 0.25 percentage points per annum; (b) as to that portion of the Loan 
included in Facility B: (1) for any and all times through and including May 
31, 1999, 3.50 percentage points per annum; and (2) for any and all times 
after May 31, 1999, 3.75 percentage points per annum.

          "BORROWER" means Basin Exploration, Inc., a Delaware corporation.

          "BORROWING BASE" means, at any time, the sum of the Borrowing Base 
(Conforming) at that time and the Borrowing Base (Supplemental) at that time.

          "BORROWING BASE (CONFORMING)" means, at any time prior to the 
Maturity Date, that portion of the Borrowing Base attributable to Facility A, 
which shall be the aggregate loan value of all Borrowing Base Properties, as 
determined by Lenders in their sole and absolute discretion, in accordance 
with the procedures for conforming oil and gas borrowing base loans set forth 
in Section 3.2 below; provided that the Borrowing Base (Conforming) for the 
time period from January 1, 1999 through the next determination of the 
Borrowing Base (Conforming) by Lenders shall be $90,000,000.

          "BORROWING BASE (SUPPLEMENTAL)" means that portion of the Borrowing 
Base attributable to Facility B, which shall be: (a) at any time prior to 
June 1, 2000, the supplemental loan value attributable to the Borrowing Base 
Properties, as determined by Lenders in their sole and absolute discretion, 
in accordance with the procedures for supplemental oil and gas borrowing base 
loans set forth in Section 3.2 below; and (b) at any time on or after June 1, 
2000, zero; provided that, the Borrowing Base (Supplemental) for the time 
period from January 1, 1999 through the next determination of the Borrowing 
Base (Supplemental) by Lenders shall be $40,000,000.

          "BORROWING BASE PROPERTIES" means, at any time, the properties of 
Borrower which have been reflected as containing proved developed reserves or 
proved undeveloped reserves in the most recent engineering report submitted 
by Borrower to Lenders pursuant to Section 6.1(b)(5) below and which have 
been evaluated by Lenders in making the then-most-recent determination of the 
Borrowing Base (Conforming) or the Borrowing Base (Supplemental).

                                       3

<PAGE>

          "BUSINESS DAY" means a day on which commercial banks are open for 
business with the public in Denver, Colorado, in Los Angeles, California and 
in Dallas, Texas. Any Business Day in any way relating to Fixed Rate 
Portions (such as the day on which an Interest Period begins or ends) must 
also be a day on which, in the judgment of Lenders, significant transactions 
in dollars are carried out in the interbank eurocurrency market.

          "CLOSING DATE" means January 5, 1999.

          "COLLATERAL" means all tangible or intangible real or personal 
property which, under the terms of any Security Document, is or is purported 
to be covered thereby or subject thereto.

          "COLLATERAL AGENT" means NBNA, in its capacity as the holder of 
Lenders' Liens on the Collateral on behalf of Lenders and any successor 
Collateral Agent appointed and accepting such appointment as described in 
Article VIII below.

          "COMMITMENT" means the agreement of each Lender to make Advances to 
Borrower of amounts up to its Proportionate Share of the Commitment Amount on 
the terms and subject to the conditions hereof.

          "COMMITMENT AMOUNT" means, at any time, the lesser of: (a) the 
Borrowing Base, or (b) the Maximum Loan Amount.

          "COMMITMENT AMOUNT (FACILITY A)" means, at any time, the lesser of: 
(a) the Borrowing Base (Conforming), or (b) the Maximum Loan Amount.

          "COMMITMENT AMOUNT (FACILITY B)" means, at any time, the lesser of: 
(a) the Borrowing Base (Supplemental), or (b)(1) the Maximum Loan Amount, 
minus (2) the Commitment Amount (Facility A).

          "COMMITMENT EXPIRATION DATE (FACILITY A)" means the date after 
which no further Advances under Facility A are to be made hereunder, which 
shall be the close of business on the earlier of: (a) the last day of the 
Revolving Period, or (b) the date of any termination of the Commitment 
insofar as it relates to Facility A.

          "COMMITMENT EXPIRATION DATE (FACILITY B)" means the date after 
which no further Advances under Facility B are to be made hereunder, which 
shall be the close of business on the earlier of: (a) May 31, 2000, or (b) 
the date of any termination of the Commitment insofar as it relates to 
Facility B.

                                       4

<PAGE>

          "COMMITMENT FEE RATE" means: (a) as to that portion of the Loan 
included in Facility A: (1) for any and all days as to which the Usage Ratio 
is less than or equal to 50 percent, 0.25 percentage points per annum; (2) 
for any and all days as to which the Usage Ratio is greater than 50 percent 
but less than or equal to 75 percent, 0.30 percentage points per annum; (3) 
for any and all days as to which the Usage Ratio is greater than 75 percent 
but less than or equal to 90 percent, 0.35 percentage points per annum; and 
(4) for any and all days as to which the Usage Ratio is greater than 90 
percent, 0.375 percentage points per annum; and (b) as to that portion of the 
Loan included in Facility B, 0.50 percentage points per annum.

          "CONSOLIDATED" refers to the consolidation of any Person, in 
accordance with GAAP, with its properly consolidated Affiliates. References 
herein to a Person's Consolidated financial statements, financial position, 
financial condition, liabilities, etc. refer to the consolidated financial 
statements, financial position, financial condition, liabilities, etc. of 
such Person and its properly consolidated Affiliates.

          "CUMULATIVE NET INCOME" means, with respect to any Person, the sum 
of such Person's net income, determined in accordance with GAAP, on a 
Consolidated basis, for each completed fiscal quarter after January 1, 1999.

          "CURRENT RATIO" means, at any time and from time to time, the ratio 
of: (a) Borrower's current assets, including without limitation any and all 
undrawn amounts then available for borrowing hereunder by Borrower; to (b) 
Borrower's current liabilities (excluding current maturities of long-term 
debt), all determined on a Consolidated basis and in accordance with GAAP.

          "DEBT" means, as to any Person, all indebtedness, liabilities and 
obligations of such Person, whether primary or secondary, direct or indirect, 
absolute or contingent.

          "DEFAULT" means any Event of Default and any default, event or 
condition which would, with the giving of any requisite Default Notice and/or 
the passage of any requisite Grace Period, constitute an Event of Default.

          "DEFAULT NOTICE" has the meaning given such term in Section 7.1 
below.

          "DISCLOSURE SCHEDULE" means: (a) Schedule 1 attached hereto, and 
(b) any documents listed on such Schedule 1 and expressly incorporated 
therein by reference, so long as 

                                       5

<PAGE>

Borrower has heretofore delivered true and correct copies of such documents 
to Lenders. Insofar as any representations and warranties made herein are 
incorporated by reference or otherwise remade in Loan Documents delivered as 
of a date after the date hereof, the term "Disclosure Schedule" shall in such 
representations and warranties be deemed to refer to all documents, 
instruments or other writings which have at the time in question been 
delivered to Lenders in connection with the transactions contemplated herein.

          "DISTRIBUTION" means any dividend payable in cash or property with 
respect to any shares of capital stock of any Person (other than dividends 
payable in shares of the same class of common, preferred or other capital 
stock as the shares upon which the dividend is being paid), any other 
distribution made with respect to any shares of capital stock of any Person, 
or any purchase, redemption or retirement of, or other payment with respect 
to, any shares of capital stock of any Person.

          "ERISA" means the Employee Retirement Income Security Act of 1974, 
as amended from time to time, together with all rules and regulations 
promulgated with respect thereto.

          "ERISA PLAN" means any pension benefit plan subject to Title IV of 
ERISA maintained by Borrower or any Affiliate of Borrower to which Borrower 
is required to contribute.

          "EURODOLLAR RATE" means, with respect to each particular Fixed Rate 
Portion and the related Interest Period, the rate of interest per annum 
(expressed as a percentage) determined by Lenders, in accordance with their 
customary practices, to be representative of the rates at which deposits of 
U.S. dollars are offered to Agent at approximately 9:00 a.m., Dallas, Texas 
time, two Business Days prior to the first day of such Interest Period (by 
prime banks in the interbank eurocurrency market which have been selected by 
Agent in accordance with their customary practices) for delivery on the first 
day of such Interest Period in an amount equal or comparable to the amount of 
such Fixed Rate Portion and for a period of time equal or comparable to the 
length of such Interest Period. The Eurodollar Rate determined by Agent with 
respect to a particular Fixed Rate Portion shall be fixed at such rate for 
the duration of the associated Interest Period. If Agent is unable so to 
determine the Eurodollar Rate for any Fixed Rate Portion, or if the 
associated Fixed Rate would cause the interest limitations set forth in 
Section 9.6 below to be applicable, Borrower shall be deemed not to have 
elected such Fixed Rate Portion.

                                       6

<PAGE>

          "EVENT OF DEFAULT" has the meaning given such term in Section 7.1 
below.

          "FACILITY A" means, at any time, that portion of the Loan which has 
been identified as being part of Facility A at the times that the Advances or 
Letters of Credit comprising such portion of the Loan were requested.

          "FACILITY B" means, at any time, that portion of the Loan which has 
been identified as being part of Facility B at the times that the Advances or 
Letters of Credit comprising such portion of the Loan were requested.

          "FEDERAL FUNDS RATE" means, for any day, the rate per annum 
(rounded upwards, if necessary, to the nearest 0.01 of one percent) equal to 
the weighted average of the rates on overnight Federal funds transactions 
with members of the Federal Reserve System arranged by federal funds brokers 
on such day, as published by the Federal Reserve Bank of Dallas, Texas on the 
Business Day next succeeding such day, provided that: (a) if the day for 
which such rate is to be determined is not a Business Day, the Federal Funds 
Rate for such day shall be such rate on such transactions on the next 
preceding Business Day as so published on the next succeeding Business Day, 
and (b) if such rate is not so published for any day, the Federal Funds Rate 
for such day shall be the average rate quoted to Agent on such day on such 
transactions, as determined by Agent.

          "FISCAL QUARTER" means a three-month period ending on the last day 
of March, June, September or December of any year.

          "FISCAL YEAR" means a twelve-month period ending on December 31 of 
any year.

          "FIXED RATE" means, with respect to each particular Fixed Rate 
Portion and the associated Eurodollar Rate and Reserve Requirement, the rate 
of interest per annum calculated by Agent (rounded upward, if necessary, to 
the next higher 0.01 percent) determined pursuant to the following formula:

                           EURODOLLAR RATE 
         Fixed   =  ----------------------------   +  Fixed Rate
         Rate       1.00  -  Reserve Requirement       Spread

If the Reserve Requirement changes during the Interest Period for a Fixed 
Rate Portion, Agent may, at its option, either change the Fixed Rate for such 
Fixed Rate Portion or leave it unchanged for the duration of such Interest 
Period. The Fixed Rate for any Fixed Rate Portion (other than Fixed Rate 
Portions in outstanding and unexpired Interest Periods) shall 

                                       7

<PAGE>

change only if Lenders receive notice from Borrower that the Usage Ratio has 
increased or decreased pursuant to Section 6.1(p) below; provided, however, 
that Lenders may make such change without receiving notice from Borrower 
based on information then available to Lenders, but Lenders will have no 
obligation to do so.

          "FIXED RATE PORTION" means any portion of the unpaid principal 
balance of the Loan which Borrower designates as such in a Rate Election.

          "FIXED RATE SPREAD" means: (a) as to that portion of the Loan 
included in Facility A: (1) for any and all days as to which the Usage Ratio 
is less than or equal to 50 percent, 0.75 percentage points per annum; (2) 
for any and all days as to which the Usage Ratio is greater than 50 percent 
but less than or equal to 75 percent, 1.00 percentage points per annum; (3) 
for any and all days as to which the Usage Ratio is greater than 75 percent 
but less than or equal to 90 percent, 1.25 percentage points per annum; and 
(4) for any and all days as to which the Usage Ratio is greater than 90 
percent, 1.50 percentage points per annum; and (b) as to that portion of the 
Loan included in Facility B: (1) for any and all times through and including 
May 31, 1999, 4.75 percentage points per annum; and (2) for any and all times 
after May 31, 1999, 5.00 percentage points per annum.

          "GAAP" means those generally accepted accounting principles and 
practices which are recognized as such by the Financial Accounting Standards 
Board (or any generally recognized successor) and which, in the case of 
Borrower and its Consolidated Affiliates, (a) are applied for all periods 
after the date hereof in a manner consistent with the manner in which such 
principles and practices were applied to the Initial Financial Statements, 
and (b) are consistently applied for all periods after the date hereof so as 
to properly reflect the financial condition, and the results of operations 
and changes in financial position, of Borrower and, on a Consolidated basis, 
of Borrower and its Consolidated Affiliates.

          "GRACE PERIOD" shall have the meaning given such term in Section 
7.1 below.

          "HEDGING OBLIGATIONS" means, with respect to any Person, all 
liabilities of such Person under: (a) interest rate swap agreements, interest 
rate cap agreements, interest rate collar agreements and all other agreements 
and arrangements designed to protect such Person against fluctuations in 
interest rates, or (b) commodity hedge, commodity swap, exchange, collar or 
cap agreements, fixed  

                                       8

<PAGE>

price agreements and all other agreements and arrangements designed to 
protect such Person against fluctuations in the price of oil, gas or other 
hydrocarbons.

          "INITIAL ENGINEERING REPORT" means a report prepared as of December 
1, 1998, prepared by Borrower, true and correct copies of which have been 
furnished to Lenders.

          "INITIAL FINANCIAL STATEMENTS" means (a) the audited annual 
Consolidated financial statements of Borrower, dated as of December 31, 1997, 
and (b) the quarterly Consolidated financial statements of Borrower dated as 
of March 31, 1998, June 30, 1998 and September 30, 1998, copies of all of 
which Initial Financial Statements have heretofore been delivered by Borrower 
to Lenders.

          "INTEREST PERIOD" means, with respect to each particular Fixed Rate 
Portion, a period of one, two, three, six or twelve months, as specified in 
the Rate Election applicable thereto, beginning on and including the date 
specified in such Rate Election (which must be a Business Day) and ending on 
but not including the date which corresponds numerically to such beginning 
date one, two, three, six or twelve months thereafter (or if such month has 
no numerically corresponding date, on the last Business Day of such month); 
provided that each Interest Period which would otherwise end on a day which 
is not a Business Day shall end on the next succeeding Business Day unless 
such next succeeding Business Day is the first Business Day of a calendar 
month, in which case such Interest Period shall end on the Business Day next 
preceding such numerically corresponding day. No Interest Period may be 
elected which would end after the date on which the Loan is due and payable 
in full.

          "LATE PAYMENT RATE" means, at the option of Lenders in each 
particular instance and as to any particular portion of the Loan: (a) the 
interest rate that would otherwise have been applicable to that portion of 
the Loan plus two percentage points per annum, or (b) any other rate of 
interest which may, with respect to the Obligation in question, be provided 
for in any other applicable Loan Document.

          "LENDERS" means NBNA, USB and Union and their respective permitted 
successors and assigns, in their respective capacities as lenders of the Loan.

          "LETTER OF CREDIT" means a standby or commercial letter of credit 
requested by Borrower and agreed to be issued by Lenders pursuant to Article 
II below. Any and all Letters of Credit shall actually be issued in the name 
of Agent, but 

                                       9

<PAGE>

any such issuance shall be on behalf of all Lenders, and each Lender shall 
participate in the risks and benefits relating to each such Letter of Credit 
to the extent of such Lender's Proportionate Share.

          "LIEN" means, with respect to any property or assets, any right or 
interest therein of a creditor to secure Debt owed to him or any other 
arrangement with such creditor which provides for the payment of such Debt 
out of such property or assets or which allows him to have such Debt 
satisfied out of such property or assets prior to the general creditors of 
any owner thereof, including without limitation any lien, mortgage, security 
interest, pledge, deposit, production payment, rights of a vendor under any 
title retention or conditional sale agreement or lease substantially 
equivalent thereto, or any other charge or encumbrance for security purposes, 
whether arising by law or agreement or otherwise, but excluding any right of 
offset which arises without agreement in the ordinary course of business.

          "LOAN" has the meaning given such term in Section 2.1 below.

          "LOAN DOCUMENTS" means this Agreement, the Security Documents, the 
Notes, Letters of Credit, applications for Letters of Credit, the Transfer 
Orders and all other agreements, certificates, legal opinions and other 
documents, instruments and writings heretofore or hereafter delivered in 
connection herewith or therewith.

          "MAJORITY LENDERS" means any two or more Lenders whose aggregate 
Proportionate Shares are not less than two-thirds.

          "MATURITY DATE" means the last day of the Amortization Period.

          "MAXIMUM LOAN AMOUNT" means, at any time, $110,000,000; provided 
that, upon the request of Borrower, Lenders may, in their sole discretion, 
increase said amount to an amount not greater than $200,000,000 by giving 
written notice of such increase to Borrower, but nothing contained in this 
Agreement, the Notes or any other Loan Document shall be deemed to commit or 
require Lenders to grant any such increase; provided further that, at any 
time prior to the end of the Revolving Period, Borrower may irrevocably 
elect, by giving written notice to Lenders, to decrease the Maximum Loan 
Amount to an amount less than the Maximum Loan Amount theretofore in effect.

                                       10

<PAGE>

          "NON-RECOURSE DEBT" means any and all indebtedness and other 
obligations of Borrower, to the extent that the rights of the holders thereof 
to enforce the indebtedness and other obligations of Borrower thereunder are 
limited to certain specific assets of Borrower and such holders have no 
recourse beyond such specific assets to the general credit of Borrower, all 
upon terms which are satisfactory in form and substance to Lenders.

          "NOTES" means: (a) the Promissory Note of even date herewith, made 
by Borrower, payable to the order of NBNA, substantially in the form of 
Exhibit A-1 attached hereto and made a part hereof, (b) the Promissory Note 
of even date herewith, made by Borrower, payable to the order of USB, 
substantially in the form of Exhibit A-2 attached hereto and made a part 
hereof, and (c) the Promissory Note of even date herewith, made by Borrower, 
payable to the order of Union, substantially in the form of Exhibit A-3 
attached hereto and made a part hereof, all as now in effect or as hereafter 
amended, modified, extended, restated or replaced.

          "OBLIGATIONS" means all Debt from time to time owing by Borrower to 
any Lender under or pursuant to any of the Loan Documents.  "OBLIGATION" 
means any part of the Obligations.

          "PAYMENT AMOUNT" means: (a) with respect to any Payment Date during 
the Revolving Period, the amount of interest accrued on the Base Rate Portion 
through such Payment Date; and (b) with respect to any Payment Date during 
the Amortization Period, 6.25 percent of the outstanding principal balance of 
the Loan as of the end of the Revolving Period plus interest accrued on the 
Base Rate Portion through such Payment Date.

          "PAYMENT DATE" means: (a) the last day of each February, May, 
August and November, commencing February 28, 1999, and (b) if all Obligations 
due and payable on any such date are not then paid, each succeeding day until 
all due and payable Obligations are paid in full.

          "PERMITTED INVESTMENT" means:

          (a)  Any evidence of indebtedness issued or guaranteed by the 
United States Government, maturing not more than one year after the date of 
acquisition by Borrower; or

          (b)  Commercial paper, maturing not more than nine months from the 
date of issuance thereof, which is issued by: (1) a corporation (other than 
an Affiliate of Borrower) organized under the laws of any state of the United 
States or of the District of Columbia and rated A-1 by Standard & Poor's 
Corporation or P-1 by Moody's Investors Service, Inc., or (2) any Lender (or 
its holding company); or

                                       11

<PAGE>

          (c)  Any certificate of deposit, maturing not more than one year 
from the date of issuance thereof, which is issued by a commercial banking 
institution that is a member of the Federal Reserve System and has a combined 
capital and surplus and undivided profits of not less than U.S. $500,000,000; 
or

          (d)  Any repurchase agreement entered into with a commercial 
banking institution that is a member of the Federal Reserve System and has a 
combined capital and surplus and undivided profits of not less than U.S. 
$500,000,000, which: (1) is secured by a fully perfected security interest in 
any obligation of the type described in any of clauses (a) through (c) above, 
and (2) has a market value at the time such repurchase agreement is entered 
into of not less than 100 percent of the repurchase obligation of such 
commercial banking institution thereunder; or

          (e)  Any deposit account at a commercial banking institution that 
is a member of the Federal Reserve System and has a combined capital and 
surplus and undivided profits of not less than U.S. $500,000,000; or

          (f)  Hedging Obligations of Borrower;

          (g)  Any other investment owned by Borrower as of the date of this 
Agreement, so long as Borrower does not increase such investment after the 
date hereof; or

          (h)  Other short-term investments of durations and involving credit 
risks comparable to the investments described above.

          "PERSON" means an individual, corporation, partnership, 
association, joint-stock company, trust or trustee thereof, estate or 
executor thereof, unincorporated organization or joint venture, court or 
governmental unit or any agency or subdivision thereof, or any other legally 
recognizable entity.

          "PRIOR CREDIT AGREEMENT" has the meaning given such term in Recital 
A above.

          "PROHIBITED LIEN" means any Lien not expressly allowed under 
Section 6.2(b) below.

          "PROPORTIONATE SHARE" means, for any Lender, the fractional share 
equal to that Lender's share of all of the rights and obligations of Lenders 
hereunder, including without  

                                       12

<PAGE>

limitation the obligations of Lenders to make Advances hereunder and the 
rights of Lenders to receive payments hereunder. Unless hereafter amended, 
the Proportionate Share of each Lender shall be as follows:

<TABLE>
<S>                              <C>
                         NBNA:   36.363636%
                         USB:    36.363636%
                         Union:  27.272728%
</TABLE>

          "RATE ELECTION" has the meaning given such term in Section 2.8 
below.

          "REGULATION D" means Regulation D of the Board of Governors of the 
Federal Reserve System, as from time to time in effect.

          "RESERVE REQUIREMENT" means, on any day with respect to each 
particular Fixed Rate Portion, the maximum reserve requirement, as determined 
by Lenders (including without limitation any basic, emergency, supplemental, 
marginal or similar reserves), expressed as a decimal and rounded to the next 
higher 0.0001, which would then apply to Lenders under Regulation D with 
respect to "Eurocurrency liabilities" (as such term is defined in Regulation 
D) equal in amount to such Fixed Rate Portion, were Lenders to have any such 
"Eurocurrency liabilities". If such reserve requirement shall change after 
the date hereof, the Reserve Requirement shall be automatically increased or 
decreased, as the case may be, from time to time as of the effective time of 
each such change in such reserve requirement.

          "REVOLVING PERIOD" means the time period from the date of this 
Agreement through November 30, 2001; provided that, upon the request of 
Borrower, Lenders may, in their sole discretion, extend such time period at 
any time and from time to time to a date not later than December 31, 2006 by 
giving written notice of such extension to Borrower, but nothing contained in 
this Agreement, the Notes or any other Loan Document shall be deemed to 
commit or require Lenders to grant any such increase.

          "SECURITY DOCUMENTS" means any and all security agreements, deeds 
of trust, mortgages, chattel mortgages, pledges, guaranties, financing 
statements, continuation statements, extension agreements and other 
agreements or instruments now, heretofore, or hereafter delivered by Borrower 
to, or for the benefit of, Lenders, or any of them, in connection with the 
Prior Credit Agreement or this Agreement or any transaction contemplated 
hereby or thereby to secure or guarantee the payment of any part of the 
Obligations or the performance of any other duties and obligations of 
Borrower under the Loan Documents, whenever made or delivered.

                                       13

<PAGE>

          "SUBORDINATED DEBT" means any indebtedness or other obligations of 
Borrower, to the extent that the rights of the holders thereof to enforce the 
indebtedness and other obligations of Borrower thereunder have been 
subordinated to the rights of Lenders hereunder or in connection herewith by 
subordination agreements executed by the holders of the Subordinated Debt and 
satisfactory in form and substance to Lenders.

          "TERMINATION EVENT" means: (a) the occurrence with respect to any 
ERISA Plan of (1) a reportable event described in Section 4043(b)(5) of ERISA 
or (2) any other reportable event described in Section 4043 of ERISA other 
than a reportable event not subject to the provision for 30-day notice to the 
Pension Benefit Guaranty Corporation under such regulations, or (b) the 
withdrawal of Borrower or of any Affiliate of Borrower from an ERISA Plan 
during a plan year in which it was a "substantial employer" as defined in 
Section 4001(a)(2) of ERISA, or (c) the filing of a notice of intent to 
terminate any ERISA Plan or the treatment of any ERISA Plan amendment as a 
termination under Section 4041 of ERISA, or (d) the institution of 
proceedings to terminate any ERISA Plan by the Pension Benefit Guaranty 
Corporation under Section 4042 of ERISA, or (e) any other event or condition 
which might constitute grounds under Section 4042 of ERISA for the 
termination of, or the appointment of a trustee to administer, any ERISA Plan.

          "TRANSFER ORDERS" means transfer orders in proper form acceptable 
to Lenders and to the purchasers of production, covering the properties 
included in the Collateral, directing the purchasers of production to pay 
proceeds of such properties to Collateral Agent for the account of Borrower.

          "USAGE RATIO" means: (a) for any Business Day, the ratio of: (1) 
the outstanding principal balance of the Loan as of the close of business on 
such day plus the face amount of any and all outstanding Letters of Credit as 
of the close of business on such day, to (2) the Borrowing Base (Conforming) 
as of the close of business on such day; and (b) for any day which is not a 
Business Day, the "Usage Ratio" for the immediately preceding Business Day.

          "YEAR 2000 COMPLIANT" has the meaning given such term in Section 
5.1(n) below.

          "YEAR 2000 PROBLEM" has the meaning given such term in Section 
5.1(n) below.

                                       14

<PAGE>

          Section 1.2.  INCORPORATION OF EXHIBITS AND SCHEDULES.  All 
Exhibits and Schedules attached to this Agreement are a part hereof for all 
purposes. Reference is hereby made to such Schedules for the meaning of 
certain terms defined therein and used but not defined herein, which 
definitions are incorporated herein by reference.

          Section 1.3.  AMENDMENT OF DEFINED INSTRUMENTS.  Unless the context 
otherwise requires or unless otherwise provided herein the terms defined in 
this Agreement which refer to a particular agreement, instrument or document 
also refer to and include all renewals, extensions and modifications of such 
agreement, instrument or document, provided that nothing contained in this 
section shall be construed to authorize any such renewal, extension or 
modification.

          Section 1.4.  REFERENCES AND TITLES.  All references in this 
Agreement to Exhibits, Schedules, articles, sections, subsections and other 
subdivisions refer to the Exhibits, Schedules, articles, sections, 
subsections and other subdivisions of this Agreement unless expressly 
provided otherwise. Titles appearing at the beginning of any subdivisions 
are for convenience only and do not constitute any part of such subdivisions 
and shall be disregarded in construing the language contained in such 
subdivisions. The words "this Agreement", "this instrument", "herein", 
"hereof", "hereby", "hereunder" and words of similar import refer to this 
Agreement as a whole and not to any particular subdivision unless expressly 
so limited. The phrases "this section" and "this subsection" and similar 
phrases refer only to the sections or subsections hereof in which such 
phrases occur. Pronouns in masculine, feminine and neuter genders shall be 
construed to include any other gender, and words in the singular form shall 
be construed to include the plural and vice versa, unless the context 
otherwise requires.

          Section 1.5.  CALCULATIONS AND DETERMINATIONS.  All interest 
accruing under the Loan Documents shall be calculated on the basis of actual 
days elapsed (including the first day but excluding the last) and a year of 
360 days. Unless otherwise expressly provided herein or unless Lenders 
otherwise consent, all financial statements and reports furnished to Lenders 
hereunder shall be prepared and all financial computations and determinations 
pursuant hereto shall be made in accordance with GAAP. Each determination by 
Lenders of amounts to be paid under Sections 2.9 through 2.12 below or any 
other matters which are to be determined hereunder by Lenders (such as any 
Eurodollar Rate, Fixed Rate, Business Day, Interest Period or Reserve 
Requirement) shall, in the absence of manifest error, be conclusive and 
binding.

                                       15

<PAGE>

                                  ARTICLE II

                                   THE LOAN

          Section 2.1.  THE LOAN.  (a)  Subject to the terms and conditions 
hereof, each Lender agrees to:

          (1)  make its Proportionate Share of advances ("Advances") to 
Borrower from time to time requested by notice from Borrower to Agent, on 
behalf of Lenders (as to each of which notices Agent shall give prompt notice 
to Lenders), not later than 10:00 a.m., Denver, Colorado time on the Business 
Day on which any such Advance is requested; and

          (2)  participate, to the extent of its Proportionate Share, in the 
issuance of Letters of Credit from time to time requested upon written notice 
to Agent, on behalf of Lenders (as to each of which notices Agent shall give 
prompt notice to Lenders), from Borrower no later than five days prior to the 
requested date of issuance of each such Letter of Credit (any request by 
Borrower for an Advance or for the issuance of a Letter of Credit being 
deemed to be a certification that the conditions precedent contained in 
Sections 4.1 and 4.2 below have been satisfied);

provided that within the limitation of the Commitment Amount and subject to 
the other terms and provisions hereof, Borrower may borrow, repay and 
reborrow hereunder; provided further that Lenders shall have no obligation to:

                    (A)  make any Advance which has been requested by Borrower
          to be included in Facility A or issue any Letter of Credit which has
          been requested by Borrower to be included in Facility A after the
          Commitment Expiration Date (Facility A);

                    (B)  make any Advance which has been requested by Borrower
          to be included in Facility B or issue any Letter of Credit which has
          been requested by Borrower to be included in Facility B after the
          Commitment Expiration Date (Facility B);

                    (C)  issue or renew a Letter of Credit which has been
          requested by Borrower to be included in Facility A if such Letter of
          Credit would not expire prior to the Commitment Expiration Date
          (Facility A);

                    (D)  issue or renew a Letter of Credit which has been
          requested by Borrower to be included in Facility B if such Letter of
          Credit would not expire prior to the Commitment Expiration Date
          (Facility B);

                                       16

<PAGE>

                    (E)  issue or renew a Letter of Credit if, after the
          issuance or renewal of such Letter of Credit, the aggregate amount of
          all Letters of Credit outstanding hereunder would exceed $10,000,000;

                    (F)  make an Advance which has been requested by Borrower to
          be included in Facility A or issue or renew a Letter of Credit which
          has been requested by Borrower to be included in Facility A, if, after
          the making of such Advance or the issuance or renewal of such Letter
          of Credit, the aggregate amount of all Advances outstanding hereunder
          which have been requested by Borrower to be included in Facility A
          plus the face amount of all Letters of Credit outstanding hereunder
          which have been requested by Borrower to be included in Facility A
          would exceed the Borrowing Base (Conforming); or

                    (G)  make an Advance which has been requested by Borrower to
          be included in Facility B or issue or renew a Letter of Credit which
          has been requested by Borrower to be included in Facility B, if, after
          the making of such Advance or the issuance or renewal of such Letter
          of Credit, the aggregate amount of all Advances outstanding hereunder
          which have been requested by Borrower to be included in Facility B
          plus the face amount of all Letters of Credit outstanding hereunder
          which have been requested by Borrower to be included in Facility B
          would exceed the Borrowing Base (Supplemental).

          (b)  Subject to the satisfaction (or waiver by Lenders) of all of 
the conditions precedent to the initial Advance, as more fully set forth in 
Article IV below, Borrower shall be deemed to have requested, and each Lender 
shall be deemed to have made its Proportionate Share of, the initial Advance 
on the Closing Date, in an aggregate amount equal to the entire balance of 
principal, interest, fees and other amounts outstanding in connection with 
the Prior Credit Agreement. The intent of Lenders is that each Lender will 
participate in accordance with its Proportionate Share and with equal 
priority in the extension and refinancing of the indebtedness outstanding 
under the Prior Credit Agreement, and Lenders hereby assign and cross-assign 
to one another all rights and interests with respect to the indebtedness 
under the Prior Credit Agreement in order to accomplish such result.

                                       17

<PAGE>

On the Closing Date, Lenders will make such payments by wire transfer among 
themselves as Agent may determine to be necessary so that each Lender has 
made its Proportionate Share of the outstanding principal balance of the Loan 
as of that date.

          (c)  Each request by Borrower for an Advance shall be in the form 
of Exhibit B attached hereto and made a part hereof and shall be sent by 
Borrower to Agent, on behalf of Lenders (as to each of which notices Agent 
shall give prompt notice to Lenders). Each request by Borrower for the 
issuance of a Letter of Credit shall be in the form of Exhibit C attached 
hereto and made a part hereof, shall be sent by Borrower to Agent, on behalf 
of Lenders (as to each of which notices Agent shall give prompt notice to 
Lenders), and shall be accompanied by an application for issuance of a letter 
of credit on Agent's then-standard form, duly executed by Borrower.

          (d)  Each payment by any Lender under or in connection with a 
Letter of Credit issued under: (1) Facility A shall be deemed to be an 
Advance under Facility A, or (2) Facility B shall be deemed to be an Advance 
under Facility B. Each such Advance shall bear interest from the date of such 
Advance, shall be entitled to all benefits of the Security Documents and 
shall be subject to all terms of this Agreement and any and all other 
applicable Loan Documents.

          (e)  The above-described Advances and Letters of Credit, in the 
aggregate, shall be herein referred to as the "Loan". Borrower hereby 
expressly requests and irrevocably authorizes each Lender to make its 
Proportionate Share of the Loan.

          Section 2.2.   THE NOTES.  Borrower's obligation to repay the 
Advances, with interest thereon, shall be evidenced by the Notes. In the 
event any provision contained in the Notes conflicts with a provision 
contained in this Agreement, the provisions of this Agreement will control.  
The Notes shall bear interest at the rates per annum provided in the Notes.  
Borrower shall pay all accrued and unpaid interest due on the Notes on each 
Payment Date.

          Section 2.3.   MANDATORY PAYMENTS.

               (a)  Borrower shall make a payment of principal and/or 
interest on each Payment Date, commencing February 28, 1999, each such 
payment to be in an amount equal to the Payment Amount in effect for such 
Payment Date; provided that any and all such payments shall be in addition to 
any amount 

                                       18

<PAGE>

payable by Borrower pursuant to the other provisions of this Section 2.3 or 
pursuant to the provisions of Section 3.2 below. Interest accrued on each 
Fixed Rate Portion shall be due and payable on the last day of the Interest 
Period for such Fixed Rate Portion (and, in the case of any Fixed Rate 
Portion having an Interest Period in excess of three months, on each 
three-month anniversary of the first day of such Interest Period). On the 
last day of the Amortization Period, the entire unpaid principal balance of 
the Loan and all accrued and unpaid interest thereon shall be due and payable 
unless Lenders have extended the term of the Loan.

               (b)  In the event that, on or before the Commitment Expiration 
Date (Facility B), Borrower sells, farms-out or otherwise transfers any oil 
or gas property or any interest therein and receives cash or cash-equivalents 
in exchange therefor, and if in connection therewith Lenders have the right 
to redetermine the Borrowing Base pursuant to Section 3.2(b) below, Borrower 
shall, within one Business Day after receipt of such cash or 
cash-equivalents, make a mandatory prepayment on the Loan (or, if necessary 
to avoid a breakage fee on a Fixed Rate Portion, a temporary deposit to be 
held by Agent in an interest-bearing account either until the expiration of 
such Fixed Rate Portion or, if there is availability for additional Advances 
to be made in accordance with the terms of this Agreement, until redrawn by 
Borrower) to Agent, on behalf of Lenders, in the amount of the net proceeds 
of any such transfer (gross proceeds minus reasonable brokers' fees and other 
reasonable expenses incurred by Borrower in connection with such transfer).  
Any such mandatory prepayment shall be applied to the repayment of the Loan 
as follows: first, to Facility B, to the extent that any amount remains 
outstanding under Facility B, and second, to Facility A.

               (c)  In the event that, on or before the Commitment Expiration 
Date (Facility B), Borrower issues additional equity after the date hereof in 
exchange for cash, cash-equivalents or any other consideration, Borrower 
shall, within one Business Day after receipt of such consideration, make a 
mandatory prepayment on the Loan to Agent, on behalf of Lenders, in an amount 
equal to the lesser of: (1) the net value of the consideration received by 
Borrower for such equity issuance (gross proceeds minus reasonable 
underwriters' fees and other reasonable expenses incurred by Borrower in 
connection with such equity issuance), or (2) the amount required to repay 
Facility B in its entirety. In addition, the Borrowing Base (Supplemental) 
will be permanently reduced (but not below zero) by the amount of any such 
mandatory prepayment which is applied to the repayment of Facility B.

                                       19

<PAGE>

               (d)  In the event that, on or before the Commitment Expiration 
Date (Facility B), Borrower issues Subordinated Debt after the date hereof in 
exchange for cash, cash-equivalents or any other consideration, Borrower 
shall, within one Business Day after receipt of such consideration, make a 
mandatory prepayment on the Loan to Agent, on behalf of Lenders, in an amount 
equal to the lesser of: (1) the net value of the consideration received by 
Borrower for such Subordinated Debt issuance (gross proceeds minus reasonable 
underwriters' fees and other reasonable expenses incurred by Borrower in 
connection with such Subordinated Debt issuance), (2) the amount required to 
repay Facility B in its entirety. In addition, the Borrowing Base 
(Supplemental) will be permanently reduced (but not below zero) by the amount 
of any such mandatory prepayment which is applied to the repayment of 
Facility B.

          Section 2.4.  VOLUNTARY PREPAYMENTS.  Borrower shall have the 
right to prepay the Notes at any time, in whole or in part, without penalty 
or premium, except that Borrower shall be required to pay any amount payable 
pursuant to Section 2.12 below.

          Section 2.5.  TERMINATION OF COMMITMENT.  Borrower shall have the 
right at any time and from time to time, upon not less than three business 
days' prior written or telegraphic notice to Lenders, to terminate the 
Commitment. Upon any termination of the Commitment, Borrower shall, at the 
time of such termination, prepay the Notes in full. Any such prepayment 
shall be without penalty or premium, except that Borrower shall be required 
to pay any amount payable pursuant to Section 2.12 below.

          Section 2.6.  PAYMENTS TO LENDERS.

               (a)  REQUIRED PAYMENTS.  Borrower will pay to Agent, on behalf 
of Lenders (and Agent shall pay each Lender its respective Proportionate 
Share thereof on the Business Day that any such payment is deemed to be 
received from Borrower), each payment which Borrower owes under the Loan 
Documents, not later than 11:00 a.m., Denver, Colorado time, in lawful money 
of the United States of America and in immediately available funds. Any 
payment received after such time will be deemed to have been made on the next 
following Business Day. Except as otherwise provided in this Agreement with 
respect to Fixed Rate Portions, should any such payment become due and 
payable on a day other than a Business Day, the maturity of such payment 
shall be extended to the next succeeding Business Day, and, in the case of a 
payment of principal or past due interest, interest shall accrue and be 
payable thereon for the 

                                       20

<PAGE>

period of such extension. Each payment under a Loan Document shall be due 
and payable at the place provided therein and, if no specific place of 
payment is provided, shall be due and payable at the respective places of 
payment of the Notes.

               (b)  OPTIONAL PREPAYMENTS.  All prepayments made by Borrower 
pursuant to Section 2.4 above or Section 2.5 above shall be paid by Borrower 
to Agent, on behalf of Lenders (and Agent shall pay each Lender its 
respective Proportionate Share thereof on the Business Day that any such 
payment is deemed to be received from Borrower). Any such payment received 
after 11:00 a.m. Denver, Colorado time will be deemed to have been made on 
the next following Business Day. Lenders shall apply any such prepayment: 
(1) as Borrower specifies at the time the prepayment is made, or (2) if 
Borrower does not so specify, as Agent may elect on behalf of Lenders.

          Section 2.7.  REGULATION U.  In no event shall the funds from the 
Loan be used directly or indirectly for the purpose, whether immediate, 
incidental or ultimate, of purchasing, acquiring or carrying any "margin 
stock" (as such term is defined in Regulation U promulgated by the Board of 
Governors of the Federal Reserve System) or to extend credit to others 
directly or indirectly for the purpose of purchasing or carrying any such 
margin stock. Borrower represents and warrants to Lenders that Borrower is 
not engaged principally, or as one of Borrower's important activities, in the 
business of extending credit to others for the purpose of purchasing or 
carrying such margin stock.

          Section 2.8.  RATE ELECTIONS.  Borrower may from time to time 
designate all or any portion of the Loan (including any yet-to-be-made 
Advances which are to be made prior to or at the beginning of the designated 
Interest Period but excluding any portion of the Loan which is required to be 
repaid prior to the end of the designated Interest Period) as a Fixed Rate 
Portion; provided that, without the consent of Lenders, Borrower may make no 
such election during the continuance of a Default and Borrower may make such 
an election with respect to an already existing Fixed Rate Portion only if 
such election will take effect at or after the termination of the Interest 
Period applicable to such already existing Fixed Rate Portion. Each election 
by Borrower of a Fixed Rate Portion shall:

          (a)  Be made in writing in the form and substance of the "Rate
     Election" attached hereto as Exhibit D, duly completed;

          (b)  Specify the amount of the Loan which Borrower desires to
     designate as a Fixed Rate Portion, the first day of the Interest Period
     which is to apply thereto, and the length of such Interest Period; and

                                       21

<PAGE>

          (c)  Be received by Lenders not later than 10:00 a.m., Denver,
     Colorado time, on the third Business Day preceding the first day of the
     specified Interest Period.

Each election which meets the requirements of this Section 2.8 (herein called 
a "Rate Election") shall be irrevocable. Borrower may make no Rate Election 
which does not specify an Interest Period complying with the definition of 
"Interest Period" in Section 1.1 above, and the amount of the Fixed Rate 
Portion elected in any Rate Election must be an amount greater than or equal 
to $4,000,000 and an integral multiple of $1,000,000. Upon the termination 
of each Interest Period, the portion of the Loan theretofore constituting the 
related Fixed Rate Portion shall, unless the subject of a new Rate Election 
then taking effect, automatically become a part of the Base Rate Portion and 
become subject to all provisions of the Loan Documents governing the Base 
Rate Portion. Borrower shall have no more than eight Fixed Rate Portions in 
effect at any time.

          Section 2.9.  INCREASED COST OF FIXED RATE PORTIONS.  If any 
applicable domestic or foreign law, treaty, rule or regulation (whether now 
in effect or hereafter enacted or promulgated, including Regulation D) or any 
interpretation or administration thereof by any governmental authority 
charged with the interpretation or administration thereof (whether or not 
having the force of law):

               (a)  Shall change the basis of taxation of payments to Lenders of
     any principal, interest, or other amounts attributable to any Fixed Rate
     Portion or otherwise due under this Agreement in respect of any Fixed Rate
     Portion (other than taxes imposed on the overall net income of any Lender
     or any lending office of any Lender by any jurisdiction in which any Lender
     or any such lending office is located); or

               (b)  Shall change, impose, modify, apply or deem applicable any
     reserve, special deposit or similar requirements in respect of any Fixed
     Rate Portion (excluding those for which Lenders are fully compensated
     pursuant to adjustments made in the definition of Fixed Rate) or against
     assets of, deposits with or for the account of, or credit extended by, any
     Lender to the extent the same relate to a Fixed Rate Portion; or

               (c)  Shall impose on any Lender or the interbank eurocurrency
     deposit market any other condition affecting any Fixed Rate Portion, the
     result of which is to increase the cost to any Lender of funding or
     maintaining any Fixed Rate Portion or to reduce the amount of any sum
     receivable by any Lender in respect of any Fixed Rate Portion by an amount
     deemed by such Lender to be material;

                                       22

<PAGE>

then: (x) Lenders shall promptly notify Borrower in writing of the happening 
of such event, (y) Borrower shall upon demand pay to Lenders such additional 
amount or amounts as will compensate Lenders for any such event (on an 
after-tax basis), and (z) Borrower may elect, by giving to Lenders not less 
than three Business Days' notice, to convert all (but not less than all) of 
any such Fixed Rate Portion into a part of the Base Rate Portion.

          Section 2.10.  AVAILABILITY.  If Lenders shall determine, in a 
manner consistent with determinations with respect to other borrowers (which 
determination shall, upon notice thereof to Borrower, be conclusive and 
binding on Borrower and Lenders), that: (a) the introduction of or any change 
in or in the interpretation of any law, treaty, rule or regulation makes it 
unlawful or impracticable, or any central bank or other governmental 
authority asserts that it is unlawful, for Lenders to make, continue or 
maintain any Fixed Rate Portion or shall materially restrict the authority of 
Lenders to purchase or take offshore deposits of dollars (i.e., 
"eurodollars"), or (b) matching deposits appropriate to fund or maintain any 
Fixed Rate Portion are not available to them, or (c) the formula for 
calculating the Eurodollar Rate does not fairly reflect the cost to Lenders 
of making or maintaining loans based on such rate, then Borrower's right to 
elect Fixed Rate Portions shall be suspended to the extent and for the 
duration of such illegality, impracticability or restriction and all Fixed 
Rate Portions (or portions thereof) which are then outstanding or are then 
the subject of any Rate Election and which cannot lawfully or practicably be 
maintained or funded shall immediately become or remain part of the Base Rate 
Portion. Borrower agrees to indemnify Lenders and hold them harmless against 
all costs, expenses, claims, penalties, liabilities and damages which may 
result from any such change in law, treaty, rule, regulation, interpretation 
or administration.

          Section 2.11.  REIMBURSABLE TAXES.  Borrower covenants and agrees 
that:

               (a)  Borrower will indemnify Lenders against, and reimburse 
Lenders for, all present and future income, excise, stamp or franchise taxes 
and other taxes, fees, duties, withholdings or other charges of any nature 
whatsoever imposed, assessed, levied or collected on or in respect of this 
Agreement insofar as it pertains to a Fixed Rate Portion or any Fixed Rate 
Portions (whether or not legally imposed, assessed, levied or collected), but 
excluding taxes imposed on or measured by any Lender's net income or receipts 
(such non-excluded items being called "Reimbursable Taxes"). Such 
indemnification shall be on an after-tax basis, taking into account any 
income taxes imposed on the amounts paid as indemnity.

                                       23

<PAGE>

               (b)  All payments by Borrower on account of principal of, and 
interest on, the Loan and all other amounts payable by Borrower to Lenders 
hereunder shall be made in full without set-off or counterclaim and shall be 
made free and clear of and without deduction or withholding for any 
Reimbursable Taxes, all of which shall be for the account of Borrower. In 
the event that any withholding or deduction from any payment to be made by 
Borrower hereunder is required in respect of any Reimbursable Taxes pursuant 
to any applicable law, rule or regulation, Borrower shall pay on the due date 
of such payment, by way of additional interest, such additional amounts as 
are needed to ensure that the amount actually received by Lenders will equal 
the full amount Lenders would have received had no such withholding or 
deduction been required. If Borrower shall make any deduction or withholding 
as aforesaid, Borrower shall within 60 days thereafter forward to Lenders an 
official receipt or other official document evidencing payment of such 
deduction or withholding.

               (c)  If Borrower is ever required to pay any Reimbursable Tax 
with respect to any Fixed Rate Portion, Borrower may elect, by giving to 
Lenders not less than three Business Days' notice, to convert all (but not 
less than all) of any such Fixed Rate Portion into a part of the Base Rate 
Portion, but such election shall not diminish Borrower's obligation to pay 
all Reimbursable Taxes.

          Section 2.12.  FUNDING LOSSES.  In addition to its other 
obligations hereunder, Borrower will indemnify Lenders against, and reimburse 
Lenders on demand for, any loss or expense (including any loss or expense 
incurred by reason of the liquidation or reemployment of deposits or other 
funds acquired by Lenders to make, continue or maintain any Fixed Rate 
Portion or any Advance) as a result of: (a) any payment or prepayment 
(whether authorized or required hereunder or otherwise) of all or any portion 
of a Fixed Rate Portion on a date other than the scheduled last day of the 
Interest Period applicable thereto; (b) any payment or prepayment, whether 
required hereunder or otherwise, of the Loan made after the delivery, but 
before the effective date, of a Rate Election, if such payment or prepayment 
prevents such Rate Election from becoming fully effective; (c) the failure of 
any Advance to be made or of any Rate Election to become effective due to any 
condition precedent not being satisfied or due to any other action or 
inaction of Borrower; or (d) any conversion (whether authorized or required 
hereunder or otherwise) of all or any portion of any Fixed Rate Portion into 
the Base Rate Portion or into a different Fixed Rate Portion on a day other 
than the day on which the applicable Interest Period ends.

                                       24

<PAGE>

          Section 2.13.  CAPITAL REIMBURSEMENT.  If either: (a) the 
introduction or implementation of or the compliance with or any change in or 
in the interpretation of any law, rule or regulation, or (b) the introduction 
or implementation of or the compliance with any request, directive or 
guideline from any central bank or other governmental authority (whether or 
not having the force of law) affects or would affect the amount of capital 
required or expected to be maintained by any Lender or any corporation 
controlling any Lender, then, upon demand by such Lender, Borrower will pay 
to such Lender, from time to time as specified by such Lender, such 
additional amount or amounts which such Lender shall determine to be 
appropriate to compensate such Lender or any corporation controlling such 
Lender in light of such circumstances, to the extent that such Lender 
reasonably determines that the amount of any such capital would be increased 
or the rate of return on any such capital would be reduced by or in whole or 
in part based on the existence of the face amount of such Lender's 
Proportionate Share of the Loan or such Lender's commitments under this 
Agreement or the existence of the Letters of Credit issued hereunder.

                                  ARTICLE III

                SECURITY; BORROWING BASE DETERMINATIONS; FEES

          Section 3.1.  THE SECURITY.  The Obligations will be secured by the 
Security Documents delivered by Borrower to, or for the benefit of Lenders, 
or any of them, contemporaneously herewith or at any time prior hereto, and 
any additional Security Documents hereafter delivered by Borrower and 
accepted by, or on behalf of, Lenders.

          Section 3.2.  BORROWING BASE PROCEDURES.  At the times described 
below, Lenders will perform a review of the Borrowing Base Properties and 
will determine the Borrowing Base (Conforming) and, if applicable, the 
Borrowing Base (Supplemental), based upon their then-current customary 
practices and standards in making conforming and supplemental borrowing base 
determinations applied generally to their substantial energy credits (which 
will be substantially similar to their present practices, except for 
market-induced changes relating to pricing, costs and risk factors relating 
to types of oil and gas reserves) and taking into account such other factors 
as Lenders in their reasonable discretion deem appropriate. The timing of 
Borrowing Base determinations will be as follows:

                                       25
<PAGE>

          (a)  regular quarterly or semi-annual determinations: (1) on or 
before the Commitment Expiration Date (Facility B), as of approximately March 
1, June 1, September 1 and December 1 of each year, commencing in March, 
1999, and (2) after the Commitment Expiration Date (Facility B), as of 
approximately June 1 and December 1 of each year;

          (b)  at the option of Lenders, at any time that Borrower has sold 
properties having an aggregate value in excess of $5,000,000 since the 
previous determination of the Borrowing Base;

          (c)  at the option of Lenders, at any time that Borrower issues 
Subordinated Debt;

          (d)  at the option of Lenders, up to one additional time per 
calendar year; and

          (e)  at the option of Borrower, up to one additional time per 
calendar year.

Promptly after each such determination of the Borrowing Base (Conforming) 
and/or the Borrowing Base (Supplemental), Lenders shall advise Borrower of 
the new Borrowing Base (Conforming) and/or the new Borrowing Base 
(Supplemental). If, at the time of any such determination or at any other 
time:

          (y)  the then-outstanding principal balance of all Advances plus the 
face amount of all Letters of Credit outstanding hereunder exceeds the 
Commitment Amount, Borrower shall:

                    (1)  within 30 days of any such determination, mortgage, by
          instruments satisfactory in form and substance to Lenders, sufficient
          additional available collateral owned by Borrower and satisfactory to
          Lenders to increase the Commitment Amount by an amount sufficient to
          eliminate such excess; or

                    (2)  within 90 days of any such determination, prepay the
          principal of the Loan in an amount at least equal to the amount of
          such excess; or

                    (3)  within 30 days of any such determination, commence (and
          thereafter continue) an amortization schedule under which Borrower
          repays the Loan in an amount at least equal to the excess in six equal
          monthly principal installments on the last Business Day of each
          calendar month,

                                       26

<PAGE>

          which amounts shall be in addition to the monthly interest payments 
          and any other principal payments otherwise due, such that the entire 
          excess is paid within six months;

          (z) clause (y) above does not apply, but either: (1) the 
then-outstanding principal balance of all Advances under Facility A plus the 
face amount of all Letters of Credit outstanding under Facility A exceeds the 
Borrowing Base (Conforming), or the then-outstanding principal balance of all 
Advances under Facility B plus the face amount of all Letters of Credit 
outstanding under Facility B exceeds the Borrowing Base (Supplemental), Agent 
shall reallocate the Loan between Facility A and Facility B so as to 
eliminate any such excess.

Failure by Borrower to comply with the provisions of clause (y) above shall 
be deemed an Event of Default hereunder.

          Section 3.3.  PERFECTION AND PROTECTION OF SECURITY INTERESTS AND 
LIENS.  Borrower will from time to time deliver to Lenders any financing 
statements, continuation statements, extension agreements and other 
documents, properly completed and executed (and acknowledged when required) 
by Borrower, in form and substance reasonably satisfactory to Lenders, which 
Lenders may request for the purpose of perfecting, confirming or protecting 
Lenders' Liens and other rights in the Collateral.

          Section 3.4.  BANK ACCOUNTS AND OFFSET.  To secure the repayment of 
the Obligations, Borrower hereby grants to Lenders a security interest, a 
lien, and a right of offset, each of which shall be upon and against (a) any 
and all moneys, securities or other property (and the proceeds therefrom) of 
Borrower now or hereafter held or received by or in transit to any Lender 
from or for the account of Borrower, whether for safekeeping, custody, 
pledge, transmission, collection or otherwise, (b) any and all deposits 
(general or special, time or demand, provisional or final) of Borrower with 
any Lender, and (c) any other credits and claims of Borrower at any time 
existing against any Lender, including without limitation claims under 
certificates of deposit; provided that the foregoing security interest, lien 
and right of offset shall not apply to amounts held by Borrower in trust for 
the benefit of Persons other than Borrower. Upon the occurrence of any Event 
of Default, Lenders are hereby authorized to foreclose upon, offset, 
appropriate, and apply, at any time and from time to time, without notice to 
Borrower, any and all items hereinabove referred to against the Obligations 
(whether or not such Obligations are then due and payable).

                                       27

<PAGE>

          Section 3.5.  PROCEEDS OF RUNS.  By the terms of the Security 
Documents, Borrower is and will be assigning to Collateral Agent, for the 
benefit of Lenders, all of the proceeds of production accruing to the 
property covered thereby. Until and unless an Event of Default has occurred 
and is continuing, Collateral Agent, on behalf of Lenders, shall permit 
Borrower to continue to receive such proceeds of production.

          Section 3.6.  FEES.  (a)  Borrower shall pay to Agent, on behalf of 
Lenders (and Agent shall pay each Lender its respective Proportionate Share 
thereof on the Business Day that any such payment is deemed to be received 
from Borrower), within 30 days after the end of each three-month period 
ending on the last day of February, May, August or November during the 
Revolving Period, commencing with the period from the Closing Date through 
February 28, 1999, a commitment fee, computed on a daily basis for such time 
period, in an amount equal to:

                    (1) for Facility A: (A) the Commitment Fee Rate applicable
          to Facility A, times (B)(i)the Commitment Amount (Facility A), less
          (ii) the principal balance of all Advances outstanding under
          Facility A, less (iii) the face amount of all Letters of Credit
          outstanding under Facility A; and

                    (2) for Facility B: (A) the Commitment Fee Rate applicable
          to Facility B, times (B)(i) the Commitment Amount (Facility B), less
          (ii) the principal balance of all Advances outstanding under
          Facility B, less (iii) the face amount of all Letters of Credit
          outstanding under Facility B.

               (b)  Borrower shall pay to Agent, on behalf of Lenders (and, 
as to the fee described in (1) below, Agent shall pay each Lender its 
respective Proportionate Share thereof on the Business Day that any such 
payment is deemed to be received from Borrower), with respect to each Letter 
of Credit the following fees:

                    (1)  for the account of all Lenders, an amount equal to the
          greater of: (A) $250.00, or (B)(i) the applicable Fixed Rate Spread in
          effect at the time of issuance of such Letter of Credit (which shall
          be the Fixed Rate Spread applicable to Facility A, if the Letter of
          Credit is to be included in Facility A, or the Fixed Rate Spread
          applicable to Facility B, if the Letter of Credit is to be included in
          Facility B), times (ii) the face amount of such Letter of Credit,
          times (iii) the term of such Letter of Credit, expressed in years; and

                                       28

<PAGE>

                    (2)  for the account of the Lender issuing such Letter of
          Credit: (A) one-eighth of one percentage point per annum, times
          (B) the face amount of such Letter of Credit, times (C) the term of
          such Letter of Credit, expressed in years.

Such Letter of Credit fees shall be payable at the time of issuance (and 
again at the time of any renewal) of such Letter of Credit.

               (c)  As of March 1 and September 1 of each year, commencing 
March 1, 1999, through the Commitment Expiration Date (Facility B), Borrower 
shall pay to Agent, on behalf of Lenders (and Agent shall pay each Lender its 
respective Proportionate Share thereof on the Business Day that any such 
payment is deemed to be received from Borrower), an engineering fee in an 
amount equal to $2,500 per Lender.

                                  ARTICLE IV

                          CONDITIONS PRECEDENT TO LOAN

          Section 4.1.  CONDITIONS PRECEDENT TO LOAN.  Lenders shall have no 
obligation to extend and refinance (as more fully described in Section 2.1(b) 
above) the loan made pursuant to the Prior Credit Agreement unless Lenders 
shall have received all of the following in Denver, Colorado, duly executed 
and delivered and in form, substance and date satisfactory to Lenders:

          (a)  An "Omnibus Certificate" of the Secretary of Borrower, which 
shall contain the names and signatures of the officers of Borrower authorized 
to execute Loan Documents and which shall certify to the truth, correctness 
and completeness of the following exhibits attached thereto: (1) a copy of 
resolutions duly adopted by the Board of Directors of Borrower and in full 
force and effect at the time this Agreement is entered into, authorizing the 
execution of this Agreement and any and all other Loan Documents delivered or 
to be delivered by Borrower in connection herewith and with the consummation 
of the transactions contemplated herein and therein, (2) a copy of the 
articles of incorporation of Borrower and all amendments thereto, and (3) a 
copy of the bylaws of Borrower and all amendments thereto.

          (b)  A "Compliance Certificate" of an officer of Borrower in which 
such officer certifies to the satisfaction of the conditions set out in 
subsections (a), (b), and (c) of Section 4.2 below.

                                       29

<PAGE>

          (c)  Each Security Document required by Lenders.

          (d)  An opinion of Borrower's counsel in form and substance 
satisfactory to Lenders, relating to authority, enforceability and other 
related matters.

          (e)  Such title opinions, supplemental title opinions, UCC searches 
and other title information concerning the Borrowing Base Properties or any 
portions thereof as may be requested by Lenders.

          (f)  All fees owing to any Lender and, if available, legal fees 
incurred by any Lender through the date hereof in connection with the 
negotiation and preparation of this Agreement.

          (g)  Any and all other Loan Documents.

          Section 4.2.  ADDITIONAL CONDITIONS PRECEDENT.  No Lender shall 
have any obligation to make its Proportionate Share of the initial Advance or 
any subsequent Advance hereunder unless the following conditions precedent 
have been satisfied:

          (a)  All representations and warranties made by Borrower in any 
Loan Document shall be true on and as of the date of such Advance as if such 
representations and warranties had been made as of the date hereof.

          (b)  No Default shall exist as of the date of such Advance.

          (c)  Borrower shall have performed and complied with all agreements 
and conditions herein required to be performed or complied with by it on or 
prior to the date of such Advance.

          (d)  The Loan shall not be prohibited by any law or any regulation 
or order of any court or governmental agency or authority and shall not 
subject any Lender to any penalty or other onerous condition under or 
pursuant to any such law, regulation or order.

          (e)  Lenders shall have received all documents and instruments 
which any Lender has then reasonably requested, in addition to those 
described in Section 4.1 above (including without limitation opinions of 
legal counsel for Borrower; corporate documents and records; documents 
evidencing governmental authorizations, consents, approvals, licenses and 
exemptions; and certificates of public officials and of officers and 
representatives of Borrower and other persons),

                                       30

<PAGE>

as to: (1) the accuracy and validity of or compliance with all 
representations, warranties and covenants made by Borrower in this Agreement 
and the other Loan Documents, (2) the satisfaction of all conditions 
contained herein or therein, and (3) all other matters pertaining hereto and 
thereto.  All such additional documents and instruments shall be reasonably 
satisfactory to Lenders in form, substance and date.

          (f)  All legal matters relating to the Loan Documents and the 
consummation of the transactions contemplated thereby shall be reasonably 
satisfactory to Lenders and their counsel.

                                  ARTICLE V

                         REPRESENTATIONS AND WARRANTIES

          Section 5.1.  BORROWER'S REPRESENTATIONS AND WARRANTIES.  To 
induce Lenders to enter into this Agreement and to make the Loan, Borrower 
represents and warrants to Lenders that:

          (a)  NO DEFAULT.  Borrower is not in default in any material 
respect in the performance of any of the covenants and agreements contained 
herein. No event has occurred and is continuing which constitutes a Default.

          (b)  ORGANIZATION AND GOOD STANDING.  Borrower is duly organized, 
validly existing and in good standing under the laws of its state of 
organization, having all corporate powers required to carry on its business 
and enter into and carry out the transactions contemplated hereby. Borrower 
is duly qualified, in good standing, and authorized to do business in all 
other jurisdictions wherein the character of the properties owned or held by 
it or the nature of the business transacted by it makes such qualification 
necessary.

          (c)  AUTHORIZATION.  Borrower has duly taken all corporate action 
necessary to authorize the execution and delivery by it of the Loan Documents 
to which it is a party and to authorize the consummation of the transactions 
contemplated thereby and the performance of its obligations thereunder.

          (d)  NO CONFLICTS OR CONSENTS.  The execution and delivery by 
Borrower of the Loan Documents, the performance by Borrower of its 
obligations under such Loan Documents and the consummation of the 
transactions contemplated by the various Loan Documents, do not and will not: 
(1) conflict with any provision of: (A) any domestic or foreign law, statute, 
rule or regulation, (B) the articles or certificate of incorporation, bylaws 
or other governing documents of 

                                       31

<PAGE>

Borrower, or (C) any agreement, judgment, license, order or permit applicable 
to or binding upon Borrower; (2) result in the acceleration of any Debt owed 
by Borrower; or (3) result in or require the creation of any Lien upon any 
assets or properties of Borrower except as expressly contemplated in the Loan 
Documents. Except as expressly contemplated in the Loan Documents, no 
consent, approval, authorization or order of, and no notice to or filing 
with, any court or governmental authority or third party is required in 
connection with the execution, delivery or performance by Borrower of any 
Loan Document or to consummate any transactions contemplated by the Loan 
Documents.

          (e)  ENFORCEABLE OBLIGATIONS.  This Agreement is, and the other 
Loan Documents when duly executed and delivered will be, legal and binding 
obligations of Borrower, enforceable in accordance with their respective 
terms, except as limited by bankruptcy, insolvency or similar laws of general 
application relating to the enforcement of creditors' rights and as limited 
by general equitable principles.

          (f)  INITIAL FINANCIAL STATEMENTS.  The Initial Financial 
Statements fairly present Borrower's Consolidated financial position at the 
respective dates thereof and the results of Borrower's Consolidated 
operations and the changes in Borrower's Consolidated cash flows for the 
respective periods thereof. Since the date of the annual Initial Financial 
Statements no material adverse change has occurred in Borrower's Consolidated 
financial condition or businesses, except as reflected in the quarterly 
Initial Financial Statements or in the Disclosure Schedule. All Initial 
Financial Statements were prepared in accordance with GAAP.

          (g)  OTHER OBLIGATIONS.  Except as consented to by Lenders pursuant 
to the terms of this Agreement, Borrower has no outstanding Debt of any kind 
(including contingent obligations, tax assessments, and unusual forward or 
long-term commitments) which is, in the aggregate, material to Borrower or 
material with respect to Borrower's financial condition and not shown in the 
Initial Financial Statements or disclosed in the Disclosure Schedule.

          (h)  FULL DISCLOSURE.  To the best of Borrower's knowledge after 
due inquiry, no certificate, statement or other information delivered 
herewith or heretofore by Borrower to any Lender in connection with the 
negotiation of this Agreement or in connection with any transaction 
contemplated hereby contains any untrue statement of a material fact or omits 
to state any material fact known to Borrower (other than industry-wide risks 
normally associated with the type of business conducted by Borrower) 
necessary to make the

                                       32

<PAGE>

statements contained herein or therein not misleading in any material respect 
as of the date made or deemed made. At the date of this Agreement, Borrower 
is not aware of any material fact (other than industry-wide risks normally 
associated with the type of business conducted by Borrower) of which Lenders 
should not reasonably be otherwise aware that has not been disclosed to 
Lenders in writing which could materially and adversely affect Borrower's 
properties, business, prospects or condition (financial or otherwise) or 
Borrower's Consolidated properties, businesses, prospects or condition 
(financial or otherwise). In connection with the preparation of the Initial 
Engineering Report, to the best of Borrower's knowledge, Borrower furnished 
to the preparer thereof factual information that was complete and accurate in 
all material respects, it being understood that the Initial Engineering 
Report is necessarily based upon professional opinions, estimates and 
projections and that Borrower does not warrant that such opinions, estimates 
and projections will ultimately prove to have been accurate. Borrower has 
heretofore delivered to Lenders true, correct and complete copies of any 
letters and documents listed in the Disclosure Schedule.

          (i)  LITIGATION.  Except as disclosed in the Initial Financial 
Statements or in the Disclosure Schedule: (1) there are no actions, suits or 
legal, equitable, arbitrative or administrative proceedings pending, or to 
the knowledge of Borrower threatened, against Borrower before any federal, 
state, municipal or other court, department, commission, body, board, bureau, 
agency, or instrumentality, domestic or foreign, which do or may materially 
and adversely affect Borrower, Affiliates of Borrower, their ownership or use 
of any of their assets or properties, their businesses or financial condition 
or prospects, or the right or ability of Borrower to enter into the Loan 
Documents to which it is a party or perform its obligations thereunder and 
(2) there are no outstanding judgments, injunctions, writs, rulings or orders 
by any such governmental entity against Borrower which have or may have any 
such effect.

          (j)  ERISA LIABILITIES.  Except as disclosed in the Initial 
Financial Statements or in the Disclosure Schedule, no Termination Event has 
occurred with respect to any ERISA Plan, and Borrower is in compliance with 
ERISA in all material respects. Borrower is not required to contribute to, 
or has any other absolute or contingent liability in respect of, any 
"multiemployer plan" as defined in Section 4001 of ERISA.

          (k)  TITLE TO PROPERTIES.  Subject to, and not in limitation of, 
any representations or covenants on title contained in the Security 
Documents, to the best of Borrower's knowledge and subject to typical 
oil-industry operating 

                                       33

<PAGE>

agreements and product-purchase contracts and other matters listed on the 
Disclosure Schedule, Borrower has good and defensible title to the Borrowing 
Base Properties, free and clear of all Prohibited Liens, except that no 
representation or warranty is made with respect to any gas or mineral 
property or interest which does not have proved oil or gas reserves 
attributed to it in any information or report prepared for Borrower or 
submitted to Lenders.

          (l)  BORROWER'S AFFILIATES.  Borrower is not a member of any 
general or limited partnership, joint venture or association of any type 
whatsoever except those listed in the Disclosure Schedule and except for 
associations, joint ventures or other relationships: (1) which are 
established pursuant to a standard form oil and gas operating agreement, (2) 
which are not corporations or partnerships (or subject to the Uniform 
Partnership Act) under applicable state law, and (3) whose businesses are 
limited to the exploration, development and operation of oil, gas or mineral 
properties and interests owned directly by the parties in such associations, 
joint ventures or relationships. Borrower has no subsidiaries other than 
Basin Offshore Oil & Gas, Inc., a wholly-owned subsidiary. As of the date 
hereof Borrower owns, directly or indirectly, the interest identified in the 
Disclosure Schedule in each entity listed in the Disclosure Schedule.

          (m)  NAMES AND PLACES OF BUSINESS.  Borrower has not, during the 
preceding five years, been known by or used any other partnership or 
fictitious name, except as disclosed in the Disclosure Schedule. Except as 
otherwise indicated in the Disclosure Schedule, the chief executive office 
and principal place of business of Borrower are (and for the preceding five 
years have been) located at the address of Borrower set out in Section 8.3 
below. Except as indicated in the Disclosure Schedule, Borrower has no other 
office or place of business.

          (n)  YEAR 2000 COMPLIANCE.  Borrower has: (1) initiated a review 
and assessment of all areas within its business and operations (including 
those affected by suppliers and vendors) that could be adversely affected by 
the "Year 2000 Problem" (that is, the risk that computer applications used by 
Borrower (or its suppliers or vendors) may be unable to recognize and 
properly perform date-sensitive functions involving certain dates prior to 
and any date after December 31, 1999), (b) developed a plan and a time line 
for addressing the Year 2000 Problem on a timely basis, and (c) to date, 
implemented that plan in accordance with that time line. Borrower reasonably 
believes that all computer applications that are material to its business and 
operations will on a timely basis be able to perform properly date-sensitive 

                                       34

<PAGE>

functions for all dates before and after January 1, 2000 (that is, be "Year 
2000 Compliant"), except to the extent that a failure to do so would not 
present a material risk of having a material adverse effect upon Borrower, 
and Borrower is making all reasonable efforts to assure that its suppliers 
and vendors will be Year 2000 Compliant on a timely basis, except to the 
extent that a failure to do so would not present a material risk of having a 
material adverse effect upon Borrower.

          Section 5.2.  REPRESENTATIONS BY LENDERS.  Each Lender hereby 
represents that it will acquire its Note for its own account in the ordinary 
course of its commercial banking business; however, the disposition of each 
Lender's property shall at all times be and remain within its control and 
this section does not prohibit any Lender's sale of its Note or of any 
participation in its Note to any bank, financial institution or similar 
purchaser.

                                  ARTICLE VI

                             COVENANTS OF BORROWER

          Section 6.1.  AFFIRMATIVE COVENANTS.  Borrower warrants, covenants 
and agrees that until the full and final payment of the Obligations and the 
termination of this Agreement, unless Lenders have previously agreed 
otherwise in writing:

          (a)  PAYMENT AND PERFORMANCE.  Borrower will pay all amounts due 
under the Loan Documents in accordance with the terms thereof and will in all 
material respects observe, perform and comply with every covenant, term and 
condition express or implied in the Loan Documents.

          (b)  BOOKS, FINANCIAL STATEMENTS AND RECORDS.  Borrower will at all 
times maintain full and accurate books of account and records. Borrower will 
maintain a standard system of accounting and will furnish the following 
statements and reports to Lenders at Borrower's expense:

          (1)  As soon as available, and in any event within 90 days after the
               end of each Fiscal Year, complete Consolidated financial
               statements of Borrower, together with all notes thereto, prepared
               in reasonable detail in accordance with GAAP, together with an
               opinion, based on an audit using generally accepted auditing
               standards, by Arthur Andersen 

                                       35

<PAGE>

               LLP or other independent certified public accountants 
               reasonably acceptable to Lenders, stating that such 
               Consolidated financial statements have been so prepared. 
               Borrower shall also submit a report signed by the chief 
               financial officer or the chief accounting officer of Borrower 
               stating that he has read this Agreement and the Security 
               Documents and further stating that in making the examination 
               and reporting on the Consolidated financial statements 
               described above he has concluded that there did not exist any 
               condition or event at the end of such Fiscal Year or at the 
               time of his report which constituted an Event of Default or a 
               Default, or, if he did conclude that such condition or event 
               existed, specifying the nature and period of existence of any 
               such condition or event. These Consolidated financial 
               statements shall contain a Consolidated balance sheet as of 
               the end of such Fiscal Year and Consolidated statements of 
               earnings, cash flows and changes in stockholders' equity, 
               setting forth in comparative form the corresponding figures 
               for the preceding Fiscal Year.

          (2)  As soon as available and in any event within 45 days after the
               end of each Fiscal Quarter, complete Consolidated financial
               statements of Borrower, including at least a balance sheet and a
               statement of the earnings and cash flow of Borrower from the
               beginning of the then-current Fiscal Year to the end of such
               Fiscal Quarter, prepared in reasonable detail and in accordance
               with GAAP, together with a report showing the calculation of all
               applicable financial covenants and signed by the chief financial
               officer or the chief accounting officer of Borrower stating that
               he has read this Agreement and the Security Documents and further
               stating that in making the examination and reporting on the
               financial statements described above, he concluded that there did
               not exist any condition or event at the end of such 

                                       36

<PAGE>

               Fiscal Quarter or at the time of his report which constituted 
               an Event of Default or Default, or, if he did conclude that 
               such condition or event existed, specifying the nature and 
               period of existence of any such condition or event.

          (3)  As soon as available and in any event within 90 days after the
               end of each Fiscal Year, an estimate of the Consolidated cash
               flow of Borrower for the then-current Fiscal Year in a form
               substantially similar to the form of such estimates heretofore
               provided by Borrower to Lenders.

          (4)  Promptly upon their becoming available, copies of all financial
               statements, reports, notices and proxy statements sent by
               Borrower to its stockholders and all registration statements,
               periodic reports and other statements and schedules filed by
               Borrower with any securities exchange, the Securities and
               Exchange Commission or any similar governmental authority.

          (5)  By: (A) April 1 of each year, an engineering report and economic
               evaluation prepared by Ryder-Scott Company, Netherland, Sewell &
               Associates, Inc. or one or more other independent petroleum
               engineers chosen by Borrower and reasonably acceptable to
               Lenders, concerning all oil and gas properties and interests
               included in the Borrowing Base Properties, and (B) October 1 of
               each year, an engineering report and economic evaluation prepared
               by Borrower, concerning all oil and gas properties and interests
               included in the Borrowing Base Properties. These engineering
               reports shall be in form and substance satisfactory to Lenders
               and shall contain information and analysis comparable in scope to
               that contained in the Initial Engineering Report.

                                       37

<PAGE>

          (6)  At least 30 days prior to the date of any regularly-scheduled
               determination of the Borrowing Base pursuant to Section 3.2 above
               and at any other time requested by Lenders, a report describing:
               (A) by lease or unit, the gross volume of production and sales
               attributable to production (and the prices at which such sales
               were made and the revenues derived from such sales) during each
               of the three most recent calendar months for which data is
               available from the Borrowing Base Properties and from all other
               properties owned by Borrower, (B) the related severance taxes,
               other taxes and leasehold operating expenses attributable thereto
               and incurred during each such calendar month, (C) the status of
               any and all drilling and development activities being carried out
               by Borrower during each such calendar month, and (D) Borrower's
               financial forecast for the ensuing four Fiscal Quarters of
               Borrower, including Borrower's estimates of production revenues,
               capital expenditures, operating expenses, other expenses, capital
               requirements and such other information as may be requested by
               Lenders.

          (c)  OTHER INFORMATION AND INSPECTIONS.  Borrower will furnish to 
Lenders any information which any Lender may from time to time reasonably 
request concerning any covenant, provision or condition of the Loan Documents 
or any matter in connection with Borrower's business and operations that 
could reasonably be deemed to materially and adversely affect the Loan. 
Borrower will permit representatives appointed by any Lender, including 
independent accountants, agents, attorneys, appraisers and any other persons, 
to visit and inspect, at their sole risk, any of Borrower's property, 
including its books of account, other books and records, and any facilities 
or other business assets, and to make extra copies therefrom and photocopies 
and photographs thereof, and to write down and record any information such 
representatives obtain, and Borrower shall permit any Lender or its 
representatives to investigate and verify the accuracy of the information 
furnished to any Lender in connection with the Loan Documents and to discuss 
all such matters with its officers, employees and representatives. Each 
Lender agrees that, until the occurrence of a Default, it will take all 
reasonable steps to keep confidential any such proprietary information, 
provided, however, that this restriction shall not apply to information 
which: (1) has at the time in question entered the public 

                                       38

<PAGE>

domain, (2) is required to be disclosed by law or by any order, rule or 
regulation (whether valid or invalid) of any court or governmental agency, or 
(3) is furnished to purchasers or prospective purchasers of participations or 
interests in the Loan or the Notes so long as such purchasers and prospective 
purchasers have agreed to be subject to restrictions identical to those 
imposed upon Lenders under this sentence.

          (d)  NOTICE OF MATERIAL EVENTS.  Borrower will promptly notify 
Lenders: (1) of any material adverse change in Borrower's financial condition 
or Borrower's Consolidated financial condition, (2) of the occurrence of any 
Default, (3) of the acceleration of the maturity of any Debt owed by Borrower 
or of any default by Borrower under any indenture, mortgage, agreement, 
contract or other instrument to which any of them is a party or by which any 
of them or any of their properties is bound, if such acceleration or default 
might reasonably be expected to have a material adverse effect upon 
Borrower's Consolidated financial condition, (4) of any uninsured claim of 
$250,000 or more asserted against Borrower or its properties, (5) of the 
occurrence of any Termination Event, (6) of the filing of any suit or 
proceeding against Borrower in which an adverse decision could have a 
material adverse effect upon Borrower's financial condition, business or 
operations (or could result in a judgment not covered by insurance of 
$250,000 or more against Borrower), (7) of the merger or consolidation of 
Borrower or any of its Affiliates with any other business entity not 
previously affiliated with Borrower, and (8) of the sale, transfer, lease, 
exchange or disposal by Borrower of any material assets or properties or any 
assets or properties with a value in excess of $500,000, except sales of 
already-severed hydrocarbons and other products in the ordinary course of 
Borrower's business and except any transaction of a type described in Section 
6.2(d)(1), (2), (3) or (4) below (regardless of whether any such transaction 
involves Borrowing Base Properties or other properties owned by Borrower). 
Upon the occurrence of any of the foregoing Borrower will take all necessary 
or appropriate steps to remedy promptly any such material adverse change, 
Default, or default, to protect against any such adverse claim, to defend any 
such suit or proceeding, and to resolve all controversies on account of any 
of the foregoing. Borrower will also notify Lenders in writing at least 
twenty Business Days prior to the date that Borrower changes its name or the 
location of its chief executive office or principal place of business or the 
place where it keeps its books and records concerning the Collateral, 
furnishing with such notice any necessary financing statement amendments or 
requesting Lenders and their counsel to prepare the same.

                                       39

<PAGE>

          (e)  MAINTENANCE OF EXISTENCE AND QUALIFICATIONS.  Borrower will 
maintain and preserve its corporate existence and its rights and franchises 
in full force and effect and will qualify to do business as a foreign 
corporation in all states or jurisdictions where required by applicable law, 
except where the failure so to qualify will not have any material adverse 
effect on Borrower.

          (f)  MAINTENANCE OF PROPERTIES.  Borrower will in all material 
respects maintain, preserve, protect, and keep all property used or useful in 
the conduct of its business in accordance with the standards of a reasonable 
and prudent operator.

          (g)  PAYMENT OF TRADE DEBT, TAXES, ETC.  Borrower will: (1) timely 
file all required tax returns; (2) timely pay all taxes, assessments, and 
other governmental charges or levies imposed upon it or upon its income, 
profits or property; (3) pay all Debt owed by it on ordinary trade terms to 
vendors, suppliers and other Persons providing goods and services used by it 
in the ordinary course of its business; and (4) maintain appropriate accruals 
and reserves for all of the foregoing Debt in accordance with GAAP. Borrower 
will pay and discharge in all material respects, when due, all other Debt, 
taxes or assessments now or hereafter owed by it. Borrower may, however, 
delay paying or discharging any such Debt so long as it is in good faith 
contesting the validity thereof by appropriate proceedings and has set aside 
on its books adequate reserves therefor.

          (h)  INSURANCE.  Borrower will maintain with financially sound and 
reputable insurance companies, insurance with respect to its business, 
operations and properties in at least such amounts and against at least such 
risks as are usually insured against in the same general area by companies of 
established repute engaged in the same or a similar business, including 
property insurance, public liability insurance for bodily injury and property 
damage, well-control coverage insurance, workmen's compensation insurance and 
insurance against loss or damage by employee dishonesty, theft, fire, 
lightning, hail, windstorm, explosion, hazards, casualties and other 
contingencies; will apply the proceeds of any such insurance to pay for, or 
to reimburse itself for, the cost of repairing or replacing property covered 
by such insurance; and will furnish to Lenders, upon any Lender's written 
request, full information as to the insurance carried.

          (i)  PAYMENT OF EXPENSES.  Whether or not the transactions 
contemplated by this Agreement are consummated, Borrower will promptly (and 
in any event within 30 days after any invoice or other statement or notice) 
pay all reasonable costs and expenses incurred by or on behalf of any Lender  

                                       40

<PAGE>

(including attorneys' fees) in connection with: (1) the preparation, 
execution and delivery of the Loan Documents, and any and all consents, 
waivers or other documents or instruments relating thereto, (2) the filing, 
recording, refiling and re-recording of any Security Documents and any other 
documents or instruments or further assurances required to be filed or 
recorded or refiled or re-recorded by the terms of any Loan Document, and/or 
(3) the enforcement, after the occurrence of a Default or an Event of 
Default, of the Loan Documents.

          (j)  PERFORMANCE ON BORROWER'S BEHALF.  If Borrower fails to pay 
any taxes, insurance premiums or other amounts it is required to pay under 
any Loan Document, Lenders may pay the same. Borrower shall immediately 
reimburse Lenders for any such payments and each amount paid shall constitute 
a part of the Obligations, shall be secured by the Security Documents and 
shall bear interest at the Late Payment Rate from the date such amount is 
paid by Lenders until the date such amount is repaid to Lenders.

          (k)  COMPLIANCE WITH AGREEMENTS AND LAW.  Borrower will perform all 
material obligations it is required to perform under the terms of each 
indenture, mortgage, deed of trust, security agreement, lease, franchise, 
agreement, contract or other instrument or obligation to which it is a party 
or by which it or any of its properties is bound in such a way that they 
result in no material adverse effect upon the Borrowing Base Properties or 
Borrower's ability to perform its obligations under this Agreement. Borrower 
will in all material respects conduct its business and affairs in compliance 
with all laws, regulations, and orders applicable thereto (including those 
relating to pollution and other environmental matters).

          (l)  CERTIFICATIONS OF COMPLIANCE.  Borrower will furnish to 
Lenders at Borrower's expense all certifications which any Lender from time 
to time reasonably requests, including but not limited to the forms of 
evidence and assurance described in Section 4.2(e) above, as to the accuracy 
and validity of or compliance with all representations, warranties and 
covenants made by Borrower in the Loan Documents, the satisfaction of all 
conditions contained therein, and all other matters pertaining thereto.

          (m)  ADDITIONAL SECURITY DOCUMENTS.  Promptly after a request 
therefor by Lenders at any time and from time to time, Borrower will execute 
and deliver to Collateral Agent, for the benefit of Lenders, such additional 
Security Documents and/or amendments to existing Security Documents as 
Lenders may reasonably deem necessary or appropriate in order to grant to 

                                       41

<PAGE>

Collateral Agent, for the benefit of Lenders, a perfected lien on and 
security interest (subject to any other then-existing Liens, except 
Prohibited Liens) in any or all Borrowing Base Properties not previously 
mortgaged to Collateral Agent, for the benefit of Lenders.

          (n)  USE OF PROCEEDS.  Borrower will use the proceeds of the Loan 
initially to refinance the amounts payable under or in connection with the 
Prior Credit Agreement and thereafter for the exploration, acquisition and/or 
the improvement of oil and gas properties and for general working capital 
purposes.

          (o)  ENVIRONMENTAL MATTERS.  Borrower will not in any material 
respect cause or permit the Borrowing Base Properties, the Associated 
Collateral or Borrower to be in violation of, or do anything or permit 
anything to be done which will subject the Borrowing Base Properties or the 
Associated Collateral to, any remedial obligations under any applicable 
Environmental Laws, assuming disclosure to the applicable governmental 
authorities of all relevant facts, conditions and circumstances, if any, 
pertaining to the Borrowing Base Properties or the Associated Collateral, and 
Borrower will promptly notify Lenders in writing of any existing, pending or, 
to the best knowledge of Borrower, threatened investigation or inquiry by any 
governmental authority in connection with any Applicable Environmental Laws. 
Borrower will take all reasonable steps necessary to determine that no 
hazardous substances or solid wastes have been disposed of or otherwise 
released on or to the Borrowing Base Properties or the Associated Collateral. 
Borrower will not cause or permit the disposal or other release of any 
hazardous substance or solid waste (as defined in the Applicable 
Environmental Laws) on or to the Borrowing Base Properties or the Associated 
Collateral and covenants and agrees to keep or cause the Borrowing Base 
Properties or the Associated Collateral to be kept free of any hazardous 
substance or solid waste and to remove the same (or if removal is prohibited 
by law, to take whatever actions is required by law) promptly upon discovery 
at its sole expense. Upon any Lender's reasonable request, at any time and 
from time to time during the existence of this Agreement, Borrower will 
provide at Borrower's sole expenses, an inspection or audit of the Borrowing 
Base Properties and the Associated Collateral from an engineering or 
consulting firm approved by Lenders, indicating the presence or absence of 
hazardous substances and solid waste on the Borrowing Base Properties and/or 
the Associated Collateral. Insofar and only insofar as Borrower's obligations 
under this Section 6.1(o) relate to Associated Collateral which is not owned 
or controlled by Borrower, Borrower shall not be deemed to be in default 
hereunder if 

                                       42

<PAGE>

Borrower has taken any and all reasonable and practical actions available to 
it in attempting to comply with the provisions of this Section 6.1(o).

          "Associated Collateral" as used in this Section and in Section 7.3 
below shall mean any and all interest in and to (and or carved out of) the 
lands which are described or referred to in the Security Documents in 
connection with the Borrowing Base Properties, or which are otherwise 
described in any of the oil, gas and/or mineral leases or other instruments 
described in or referred to in the Security Documents whether or not such 
collateral interests are owned by Borrower.

          "Applicable Environmental Laws" as used in this Section and in 
Section 7.3 below means any laws, orders, rules, or regulations pertaining to 
health of the environment (as the same now exist or are hereafter enacted 
and/or amended), including without limitation the Comprehensive Environmental 
Response, Compensation, and Liability Act of 1980, as amended by the 
Superfund Amendments and Reauthorization Act of 1986 (as amended, hereinafter 
called "CERCLA"), the Resource Conservation and Recovery Act of 1976, as 
amended by the Used Oil Recycling Act of 1980, the solid Waste Disposal Act 
Amendments of 1980, and the Hazardous and Solid Waste Amendments on 1984 (as 
amended, hereinafter called "RCRA") and applicable state law.

          (p)  USAGE RATIO.  Borrower will notify Lenders of any change in 
the Usage Ratio that would cause a change in the applicable Base Rate Spread 
or Fixed Rate Spread, such notice to be received by Lenders not later than 
five Business Days after such change.

          (q)  YEAR 2000 COMPLIANCE.  Borrower will promptly notify Agent in 
the event Borrower discovers or determines that any computer application 
(including those of its suppliers and vendors) that is material to its 
business and operations will not be Year 2000 Compliant on a timely basis, 
except to the extent that such failure would not present a material risk of 
having a material adverse effect upon Borrower.

          Section 6.2.  NEGATIVE COVENANTS.  Borrower warrants, covenants and 
agrees that until the full and final payment of the Obligations and the 
termination of this Agreement, unless Lenders have previously agreed 
otherwise in writing:

          (a)  CURRENT RATIO.  The Current Ratio of Borrower shall not at any 
time be less than 1.0:1.0.

                                       43

<PAGE>

          (b)  LIMITATION ON LIENS.  Borrower will not create, assume or 
permit to exist any mortgage, deed of trust, pledge, encumbrance, lien or 
charge of any kind (including any security interest in or vendor's lien on 
property purchased under conditional sales or other title retention 
agreements and including any lease intended as security or in the nature of a 
title retention agreement) upon any of its properties or assets, whether now 
owned or hereafter acquired except:

               (1)  Liens at any time existing in favor of Collateral Agent, for
                    the benefit of Lenders;

               (2)  statutory Liens for taxes, statutory or contractual
                    mechanics' and materialmen's Liens incurred in the ordinary
                    course of business, and other similar Liens incurred in the
                    ordinary course of business, provided such Liens secure only
                    Debt which is not delinquent or which is being contested as
                    provided in Section 6.1(g) above;

               (3)  any Liens expressly permitted under the terms of any
                    Security Documents hereafter accepted by Lenders; and

               (4)  Liens securing Debt owing by Borrower to any third party, if
                    the existence of such Debt does not violate this Agreement;
                    provided that no such Lien (except any Lien for the benefit
                    of Lenders) shall cover or affect any of the Borrowing Base
                    Properties.

          (c)  ADDITIONAL DEBT.  Borrower will not create, incur, assume or 
permit to exist Debt not existing on the date of this Agreement, except: (1) 
trade debt owed to suppliers, pumpers, mechanics, materialmen and others 
furnishing goods or services to Borrower in the ordinary course of Borrower's 
business, (2) Hedging Obligations of Borrower in an amount not to exceed: (A) 
85 percent of the proved developed producing reserves projected to be 
produced within 120 days of the date thereof, as shown in the most recent 
engineering report delivered to Lenders pursuant to Section 6.1(b)(5) above, 
and (B) 75 percent of the proved developed producing reserves projected to be 
produced after 120 days from the date thereof, as shown in the most recent 
engineering report delivered to Lenders pursuant to Section 6.1(b)(5) above, 
(3) other Debt in the aggregate outstanding amount of not more than 
$1,000,000 at any time, (4) Subordinated Debt, and (5) Non-Recourse Debt.

                                       44

<PAGE>

          (d)  LIMITATION ON SALES OF PROPERTY.  Borrower will not sell, 
transfer, lease, exchange, alienate or dispose of any Borrowing Base 
Properties except as follows (and the following exceptions shall be subject 
to any limitations contained in the Security Documents):

          (1)  equipment which is worthless or obsolete, which is replaced by
               equipment of equal suitability and value or which is salvaged
               from wells which have been plugged and abandoned by or on behalf
               of Borrower;

          (2)  inventory (including oil and gas sold as produced and seismic
               data) which is sold in the ordinary course of business;

          (3)  personal property located on oil and gas properties operated 
               by third parties, the sale of which personal property cannot 
               be prevented by Borrower;

          (4)  farmouts, promotions, acreage swaps, acreage sales and similar 
               oil-industry arrangements for exploration or development of 
               undeveloped reserves included in the Borrowing Base 
               Properties; provided that no such arrangement shall affect in 
               any way any developed reserves included in the Borrowing Base 
               Properties; and

          (5)  properties having an aggregate value of not more than 
               $5,000,000 during any period subsequent to the then 
               most-recent determination of the Borrowing Base pursuant to 
               Section 3.2 above.

          (e)  ERISA PLANS.  Borrower will not incur any obligation to 
contribute to any "multiemployer plan" as defined in Section 4001 of ERISA.

          (f)  LIMITATION ON CREDIT EXTENSIONS.  Borrower will not extend 
credit, make advances or make loans other than: (1) normal and prudent 
extensions of credit to customers buying goods and services in the ordinary 
course of business, which extensions shall not be for longer periods than 
those extended by similar businesses operated in a normal and prudent manner, 
and (2) advances to employees of Borrower in an aggregate amount of not more 
than $15,000 outstanding at any time.

                                       45

<PAGE>

          (g)  FISCAL YEAR.  Borrower will not change its fiscal year without 
Lenders' consent, which will not be unreasonably withheld.

          (h)  AMENDMENT OF CONTRACTS.  Borrower will not amend or permit any 
amendment to any contract which could reasonably be foreseen to release, 
qualify, limit, make contingent or otherwise detrimentally affect, in any 
material way, the rights and benefits of Collateral Agent or any Lender under 
or acquired pursuant to any of the Security Documents.

          (i)  LIMITATION ON GUARANTIES.  Borrower will not guaranty or be or 
become secondarily liable for any Debt which is the primary obligation of any 
other Person.

          (j)  DISTRIBUTIONS.  Borrower will not make any Distributions; 
provided that the foregoing shall not be deemed to prevent Borrower from 
granting stock options or making restricted stock awards to the extent that 
the foregoing actions are taken in connection with Borrower's presently 
existing Equity Incentive Plan, Borrower's presently-existing Non-Employee 
Directors Stock Option Plan or any similar employee or director incentive 
program granting reasonable incentives to Borrower's employees and/or 
directors; provided further that, after the Commitment Expiration Date 
(Facility B) has occurred and Facility B has been repaid in full, Borrower 
may pay dividends and/or purchase outstanding stock of Borrower so long as, 
immediately after any such purchase or payment, the aggregate amount expended 
for such purchases and payments after the date hereof does not exceed the 
lesser of: (1) $5,000,000, or (2) 50 percent of Borrower's Cumulative Net 
Income, except that no such dividend payment or stock purchase shall be made 
at any time that a Default has occurred and is continuing or would result 
from any such payment or purchase.

          (k)  REORGANIZATIONS; COMBINATIONS.  Borrower will not change its 
name or the nature of its business, reorganize, liquidate, dissolve or enter 
into any merger, joint venture, partnership or other combination.

          (l)  INVESTMENTS.  Borrower will not purchase, acquire, hold or 
otherwise invest in, or deposit any money into, any stock, bond, evidence of 
indebtedness, deposit account or other security or investment other than any 
Permitted Investment.

                                  ARTICLE VII

                         EVENTS OF DEFAULT AND REMEDIES

          Section 7.1.  EVENTS OF DEFAULT.  Each of the following events 
constitutes an Event of Default under this Agreement:

                                       46

<PAGE>

          (a)  Borrower fails to pay any Obligation when due and payable, 
whether at a date for the payment of a fixed installment or contingent or 
other payment to any Lender or as a result of acceleration or otherwise, and 
such failure is not remedied within the applicable Grace Period; or

          (b)  Any "default" or "event of default" occurs under any Loan 
Document which defines either term, and the same is not remedied within the 
applicable period of grace (if any) provided in such Loan Document; or

          (c)  Borrower fails (other than as referred to in subsections (a) 
and (b) above) to duly observe, perform or comply with any covenant, 
agreement, condition or provision (other than those referred to in 
subsections (a) and (b) above) of any Loan Document, and such failure is not 
remedied within the applicable Grace Period; or

          (d)  Any representation or warranty previously, presently or 
hereafter made in writing by or on behalf of Borrower in connection with any 
Loan Document shall prove to have been false or incorrect in any material 
respect on any date on or as of which made, and the represented or warranted 
state of affairs does not become true within the applicable Grace Period; or

          (e)  Either: (1) any "accumulated funding deficiency" (as defined 
in Section 412(a) of the Internal Revenue Code of 1986, as amended) in excess 
of $10,000 exists with respect to any ERISA Plan, whether or not waived by 
the Secretary of the Treasury or his delegate, or (2) any Termination Event 
occurs with respect to any ERISA Plan and the then current value of such 
ERISA Plan's benefits guaranteed under Title IV of ERISA exceeds the then 
current value of such ERISA Plan's assets available for the payment of such 
benefits by more than $10,000 (or in the case of a Termination Event 
involving the withdrawal of a substantial employer, the withdrawing 
employer's proportionate share of such excess exceeds such amount); or

          (f)  Borrower:

               (1)  suffers the entry against it of a judgment, decree or order
                    for relief by a court of competent jurisdiction in an
                    involuntary proceeding commenced under any applicable
                    bankruptcy, insolvency or other similar law of any
                    jurisdiction now or hereafter in effect, including the
                    federal Bankruptcy 

                                       47

<PAGE>

                    Code, as from time to time amended, or has any such 
                    proceeding commenced against it which remains undismissed 
                    for a period of 120 days (or, if applicable, such longer 
                    or shorter period as may be necessary to ensure that 
                    Borrower has a reasonable opportunity to respond to such 
                    proceeding and request that it be dismissed); or

               (2)  suffers the appointment of a receiver, liquidator, assignee,
                    custodian, trustee, sequestrator or similar official for a
                    substantial part of its assets or for any part of the
                    Borrowing Base Properties in a proceeding brought against or
                    initiated by it, and such appointment is neither made
                    ineffective nor discharged within 30 days after the making
                    thereof, or such appointment is consented to, requested by,
                    or acquiesced to by it (or, if applicable, such longer or
                    shorter period as may be necessary to ensure that Borrower
                    has a reasonable opportunity to respond to such proceeding
                    and request that it be dismissed); or

               (3)  commences a voluntary case under any applicable bankruptcy,
                    insolvency or similar law now or hereafter in effect,
                    including the federal Bankruptcy Code, as from time to time
                    amended; or applies for or consents to the entry of an order
                    for relief in an involuntary case under any such law or to
                    the appointment of or taking possession by a receiver,
                    liquidator, assignee, custodian, trustee, sequestrator or
                    other similar official of any substantial part of its assets
                    or any part of the Borrowing Base Properties; or makes a
                    general assignment for the benefit of creditors; or fails
                    generally to pay (or admits in writing its inability to pay)
                    its debts as such debts become due; or takes corporate or
                    other action in furtherance of any of the foregoing; or

               (4)  suffers the entry against it of a final judgment for the
                    payment of money in excess of $1,000,000 (not covered by
                    insurance), unless the same is discharged within 30 

                                       48

<PAGE>

                    days after the date of entry thereof or an appeal or 
                    appropriate proceeding for review thereof is taken within 
                    such period and a stay of execution pending such appeal 
                    is obtained; or

               (5)  suffers the entry of an order issued by any court or
                    tribunal taking, seizing or apprehending all or any
                    substantial part of its property or any part of the
                    Borrowing Base Properties having a present worth, determined
                    using a 10-percent discount factor, of $2,000,000 or more
                    and bringing the same into the custody of such Court or
                    tribunal, and such order is not stayed or released within
                    thirty days after the entry thereof; or

          (g)  Any Person or Persons acting in concert (other than Michael S. 
Smith and his immediate family and entities controlled by Michael S. Smith or 
his immediate family) acquire 35 percent or more of Borrower's common stock; 
or

          (h)  Changes occur in the membership of the Board of Directors of 
Borrower (except for any change arising by reason of the death of any 
director) such that a majority of the members of the Board of Directors of 
Borrower is changed within any 12-month period; or

          (i)  Borrower fails to comply with the provisions of Section 3.2 
above within the time periods for compliance specified in Section 3.2 above.

Upon the occurrence of an Event of Default described in subsection (f)(1), 
(f)(2) or (f)(3) of this section, all of the Obligations shall thereupon be 
immediately due and payable, without presentment, demand, protest, notice of 
protest, declaration or notice of acceleration or intention to accelerate, or 
any other notice or declaration of any kind, all of which are hereby 
expressly waived by Borrower. During the continuance of any other Event of 
Default, Lenders may declare any or all of the Obligations immediately due 
and payable, and all such Obligations shall thereupon be immediately due and 
payable. The term "Grace Period," as used herein with respect to an Event of 
Default for which a Grace Period is expressly provided, means the period 
beginning on the date of the related Default and ending the number of days 
provided below after written notice of such Default (a "Default Notice") is 
given by any Lender to Borrower: (x) in the case of a Default described in 
Section 7.1(a) above 

                                       49

<PAGE>

involving a principal payment, one Business Day; (y) in the case of any 
Default described in Section 7.1(a) above not involving a principal payment, 
five Business Days; and (z) in the case of any other Default for which a 
Grace Period is expressly provided, 30 days.

          Section 7.2.  REMEDIES.  If any Default shall occur and be 
continuing, the obligation of Lenders to make Advances under this Agreement 
shall terminate immediately. If any Event of Default shall occur, Lenders may 
protect and enforce their rights under the Loan Documents by any appropriate 
proceedings, including proceedings for specific performance of any covenant 
or agreement contained in any Loan Document, and Lenders may enforce the 
payment of any Obligations due or enforce any other legal or equitable right. 
All rights, remedies and powers conferred upon Lenders under the Loan 
Documents shall be deemed cumulative and not exclusive of any other rights, 
remedies or powers available under the Loan Documents or at law or in equity.

          Section 7.3.  INDEMNITY.  Borrower hereby agrees to indemnify, 
defend and hold harmless Lenders and their agents, affiliates, officers, 
directors, and employees from and against any and all claims, losses, 
demands, actions, causes of action, and liabilities whatsoever (including 
without limitation reasonable attorney's fees and expenses, and costs and 
expenses reasonably incurred in investigating, preparing or defending against 
any litigation or claim, action, suit, proceeding or demand of any kind or 
character) arising out of or resulting from: (a) the Loan Documents 
(including without limitation the enforcement thereof), except to the extent 
such claims, losses, and liabilities are proximately caused by a Lender's 
gross negligence or willful misconduct, (b) any violation on or prior to the 
Release Date (as hereinafter defined) of any Applicable Environmental Law, 
(c) any act, omission, event or circumstance existing or occurring on or 
prior to the Release Date (including without limitation the presence on the 
Borrowing Base Properties or the Associated Collateral or release from the 
Borrowing Base Properties or the Associated Collateral of hazardous 
substances or solid wastes disposed of or otherwise released, resulting from 
or in connection with the ownership, construction, occupancy, operation, use 
and/or maintenance of the Borrowing Base Properties or the Associated 
Collateral, regardless of whether the act, omission, event or circumstance 
constituted a violation of any Applicable Environmental Law at the time of 
its existence of occurrence, and (d) any and all claims or proceedings 
(whether brought by a private party or governmental agencies) for bodily 
injury, property damage, abatement or remediation, environmental damage or 
impairment 

                                       50
<PAGE>

or any other injury or damage resulting from or relating to any hazardous or 
toxic substance, solid waste or contaminated material located upon or 
migrating into, from or through the Borrowing Base Properties or Associated 
Collateral (whether or not the release of such materials was caused by 
Borrower, a tenant or subtenant or a prior owner or tenant, or subtenant on 
the Borrowing Base Properties or the Associated Collateral and whether or not 
the alleged liability is attributable to the handling, storage, generation, 
transportation, removal or disposal of such substance, waste or material or 
the mere presence of such substance, waste or material on the Borrowing Base 
Properties or the Associated Collateral), which the any Lender may have 
liability with respect to due to the making of the Loan, the granting of the 
Security Documents, the exercise of its rights under the Loan Documents, or 
otherwise. The "Release Date" as used herein shall mean the earlier of the 
following two dates: (1) the date on which the Obligations have been paid and 
performed in full and the Security Documents have been released of record, or 
(2) the date on which the liens of the Security Documents are foreclosed or a 
deed in lieu of such foreclosure is fully effective and recorded. WITHOUT 
LIMITATION, IT IS THE INTENTION OF BORROWER, AND BORROWER AGREES, THAT THE 
FOREGOING INDEMNITIES SHALL APPLY TO EACH INDEMNIFIED PARTY WITH RESPECT TO 
CLAIMS, DEMANDS, LIABILITIES, LOSSES, DAMAGES, CAUSES OF ACTION, JUDGMENTS, 
PENALTIES, COSTS AND EXPENSES (INCLUDING WITHOUT LIMITATION REASONABLE 
ATTORNEYS' FEES) WHICH IN WHOLE OR IN PART ARE CAUSED BY OR ARISE OUT OF THE 
NEGLIGENCE OF SUCH (AND/OR ANY OTHER) INDEMNIFIED PARTY. However, such 
indemnities shall not apply to any particular indemnified party (but shall 
apply to the other indemnified parties) to the extent the subject of the 
indemnification is caused by or arises out of the gross negligence or willful 
misconduct of such particular indemnified party. The foregoing indemnities 
shall not terminate upon the Release Date or upon the release, foreclosure or 
other termination of the Security Documents, but will survive the Release 
Date, foreclosure of the Security Documents or conveyances in lieu of 
foreclosure, and the repayment of the Loan and the discharge and release of 
the Security Documents and the other documents evidencing and/or securing the 
Loan.

                                 ARTICLE VIII

                            AGENT; COLLATERAL AGENT

          Section 8.1.  ACTIONS.  Each Lender hereby irrevocably appoints 
Agent to act as agent for Lenders under and for purposes of this Agreement 
and each other Loan Document (other than the Security Documents), to the 
extent 

                                       51

<PAGE>

provided herein. Each Lender hereby irrevocably appoints Collateral Agent to 
act as collateral agent under the Security Documents. Each Lender authorizes 
Agent to act on behalf of such Lender hereunder and under the other Loan 
Documents (other than the Security Documents) and to exercise such powers 
hereunder and thereunder as are specifically delegated to or required of 
Agent by the terms hereof and thereof, together with such other powers as may 
be reasonably incidental thereto. Each Lender authorizes Collateral Agent to 
act on behalf of such Lender under the Security Documents and to exercise 
such powers thereunder as are specifically delegated to or required of 
Collateral Agent by the terms hereof and thereof, together with such other 
powers as may be reasonably incidental thereto. Without limiting the 
generality of the foregoing, each Lender authorizes Collateral Agent to act 
on behalf of such Lender to execute and accept on its behalf any and all of 
the Security Documents. Each Lender hereby indemnifies (which indemnity shall 
survive any termination of this Agreement) Agent and Collateral Agent (and 
agrees to make payment thereof to Agent within 10 days after demand is made 
by Agent), pro rata according to such Lender's Proportionate Share, from and 
against any and all liabilities, obligations, losses, damages, claims, costs 
or expenses of any kind or nature whatsoever which may at any time be imposed 
upon, incurred by, or asserted against, Agent or Collateral Agent in any way 
relating to or arising out of this Agreement or any other Loan Document, 
including reasonable attorneys' fees, and as to which Agent or Collateral 
Agent is not reimbursed by Borrower or either of them; provided, however, 
that no Lender shall be liable to Agent or Collateral Agent for the payment 
of any portion of such liabilities, obligations, losses, damages, claims, 
costs or expenses which are determined by a court of competent jurisdiction 
in a final proceeding to have resulted solely from Agent's or Collateral 
Agent's gross negligence or wilful misconduct. Agent or Collateral Agent 
shall not be required to take any action hereunder or under any other Loan 
Document, or to prosecute or defend any suit in respect of this Agreement or 
any other Loan Documents, unless it is indemnified hereunder to its 
satisfaction. If any indemnity in favor of Agent or Collateral Agent shall be 
or become, in Agent's or Collateral Agent's determination, inadequate, Agent 
or Collateral Agent may call for additional indemnification from Lenders and 
cease to do the acts indemnified against hereunder until such additional 
indemnity is given. The relationship of Agent to Lenders is only that of one 
commercial bank acting as administrative agent for others, and nothing in the 
Loan Documents shall be construed to constitute Agent a trustee or other 
fiduciary for any holder of any of the Notes or of any participation therein 
nor to impose on Agent duties and obligations other than those expressly 
provided for in the 

                                       52

<PAGE>

Loan Documents. With respect to any matters not expressly provided for in the 
Loan Documents and any matters which the Loan Documents place within the 
discretion of Agent, Agent shall not be required to exercise any discretion 
or take any action, and it may request instructions from Lenders with respect 
to any such matter, in which case it shall be required to act or to refrain 
from acting (and shall be fully protected and free from liability to all 
Lenders in so acting or refraining from acting) upon the instructions of 
Majority Lenders (including itself); provided, however, that Agent shall not 
be required to take any action which exposes it to a risk of personal 
liability that it considers unreasonable or which is contrary to the Loan 
Documents or to applicable law.

          Section 8.2.  EXCULPATION.  None of Agent, Collateral Agent or any 
Lender, nor any of their respective directors, officers, employees or agents, 
shall be liable to any Lender for any action taken or omitted to be taken by 
it under this Agreement or any other Loan Document, or in connection herewith 
or therewith, except for its own wilful misconduct or gross negligence, nor 
responsible for any recitals or warranties herein or therein, nor for the 
effectiveness, enforceability, validity or due execution of this Agreement or 
any other Loan Document, nor for the creation, perfection or priority of any 
Liens purported to be created by any of the Loan Documents, or the validity, 
genuineness, enforceability, existence, value or sufficiency of any 
collateral security, nor to make any inquiry respecting the performance by 
Borrower of its obligations hereunder or under any other Loan Document. Any 
such inquiry which may be made by any Lender, Agent or Collateral Agent shall 
not obligate it to make any further inquiry or to take any action. Each 
Lender, Agent and Collateral Agent shall be entitled to rely upon advice of 
counsel concerning legal matters and upon any notice, consent, certificate, 
statement or writing which such Lender, Agent or Collateral Agent believes to 
be genuine and to have been presented by a proper Person.

          Section 8.3.  SUCCESSOR.  Agent or Collateral Agent may resign as 
such at any time upon at least 30 days' prior notice to Borrower and all 
Lenders. If Agent or Collateral Agent at any time shall resign, Lenders may 
appoint another Lender as a successor Agent or Collateral Agent which shall 
thereupon become Agent or Collateral Agent hereunder. If no successor Agent 
or Collateral Agent shall have been so appointed by Lenders, and shall have 
accepted such appointment, within 30 days after the retiring Agent or 
Collateral Agent's giving notice of resignation, then the retiring Agent or 
Collateral Agent may, on behalf of Lenders, appoint a successor Agent or 
Collateral Agent, which shall be one of Lenders or a commercial banking 
institution organized 

                                       53

<PAGE>

under the laws of the U.S. or Canada (or any State or Province thereof) or a 
U.S. or Canadian branch or agency of a commercial banking institution, and 
having a combined capital and surplus of at least $200,000,000. Upon the 
acceptance of any appointment as Agent or Collateral Agent hereunder by a 
successor Agent or Collateral Agent, such successor Agent or Collateral Agent 
shall be entitled to receive from the retiring Agent or Collateral Agent such 
documents of transfer and assignment as such successor Agent or Collateral 
Agent may reasonably request, and shall thereupon succeed to and become 
vested with all rights, powers, privileges and duties of the retiring Agent 
or Collateral Agent, and the retiring Agent or Collateral Agent shall be 
discharged from its duties and obligations under this Agreement. After any 
retiring Agent's or Collateral Agent's resignation hereunder as Agent or 
Collateral Agent, the provisions of (a) this Article VIII shall inure to its 
benefit as to any actions taken or omitted to be taken by it while it was 
Agent or Collateral Agent under this Agreement; and (b) Section 8.2 above 
shall continue to inure to its benefit.

          Section 8.4.  OTHER LOANS BY LENDERS.  Each Lender and its 
Affiliates may accept deposits from, lend money to, and generally engage in 
any kind of business with Borrower or any Affiliate of Borrower.

          Section 8.5.  CREDIT DECISIONS.  Each Lender acknowledges that it 
has, independently of Agent, Collateral Agent and each other Lender, and 
based on such Lender's review of the financial information of Borrower, this 
Agreement, the Security Documents, the other Loan Documents (the terms and 
provisions of which being satisfactory to such Lender) and such other 
documents, information and investigations as such Lender has deemed 
appropriate, made its own credit decision to extend its Proportionate Share 
of the Commitment. Each Lender also acknowledges that it will, independently 
of Agent, Collateral Agent and each other Lender, and based on such other 
documents, information and investigations as it shall deem appropriate at any 
time, continue to make its own credit decisions as to exercising or not 
exercising from time to time any rights and privileges available to it under 
this Agreement, the Security Documents or any other Loan Document.

          Section 8.6.  PAYMENT OF COLLECTED AMOUNTS.  (a)  If any Lender 
receives any payment or other amount on account of the Loan (whether by 
exercise of such Lender's rights of setoff or banker's lien or by any other 
method) other than such Lender's Proportionate Share of any payment made by 
or on behalf of Borrower, such Lender shall, no later than the next Business 
Day after such Lender's receipt of any such payment 

                                       54

<PAGE>

or other amount, pay over to the other Lenders, their respective 
Proportionate Shares of the payment or other amount received by such Lender.

          (b)  Subject to the rights of any other persons in the Borrowing 
Base Properties, in the event of the acquisition of title to any portion of 
the Borrowing Base Properties, either through foreclosure or otherwise, this 
Agreement shall continue in full force and effect and (1) each Lender shall 
pay its Proportionate Share (determined as of the date such expenses are 
incurred) of expenses for maintenance and taxes and any and all other 
expenses necessary in connection with the acquisition, holding, sale or other 
disposition of the Borrowing Base Properties and (2) each Lender shall be 
deemed to have an undivided interest in the Borrowing Base Properties (as 
tenants-in-common) equal to such Lender's Proportionate Share.

          Section 8.7.  APPLICATION OF COLLATERAL PROCEEDS.  The Security 
Documents secure: (a) obligations of Borrower to Lenders, or any of them, or 
Collateral Agent under or in connection with this Agreement, and (b) other 
obligations of Borrower to Lenders, or any of them. The parties agree that, 
from and after the occurrence of an Event of Default and upon the election of 
Lenders to foreclose against or otherwise realize upon the Collateral, any 
amounts collected as proceeds of the Collateral shall be applied as follows: 
first, to the repayment of the obligations described in (a) above until such 
obligations have been repaid in full (with any amount collected by any Lender 
or Collateral Agent being divided pro rata among Lenders according to their 
respective Proportionate Shares of the obligations described in (a) above and 
applied by each Lender at its discretion to the principal, interest, fees and 
other amounts due under or in connection with any or all of such 
obligations); and second, to the repayment of the obligations described in 
(b) above (with any amount collected by any Lender or Collateral Agent being 
applied pro rata among all obligations owed to any Lender pursuant to (b) 
above) until such obligations have been repaid in full.

          Section 8.8.  ASSIGNMENTS; PARTICIPATIONS.  Each Lender shall have 
the right to assign all or any portion of its Proportionate Share of the Loan 
to another Person (including without limitation to another Lender) only with 
the prior written consent of Agent and Borrower, which consent shall not be 
unreasonably withheld. Each Lender shall have the right to sell limited 
participations in its Proportionate Share to another Person (including 
without limitation to another Lender), with the voting rights of any such 
transferred share being limited to those matters requiring unanimous consent 
of Lenders pursuant to Section 8.9 below. 

                                       55

<PAGE>

Prior to the time that any such assignment shall be made or participation 
shall be sold, the assigning or selling Lender shall pay to Agent a transfer 
fee in the amount of $3,500.

          Section 8.9.  MAJORITY LENDERS.  Any and all decisions to be made 
and actions to be taken by Lenders hereunder or under any of the Loan 
Documents (including without limitation any determination or re-determination 
of the Borrowing Base (Conforming) or the Borrowing Base (Supplemental), any 
consent or waiver of, or amendment to, any covenant, or any acceleration of 
the maturity of the Loan) may be made or taken by Majority Lenders on behalf 
of all Lenders; provided that Agent shall have the authority to release from 
the Security Documents properties being transferred by Borrower in accordance 
with the provisions of Section 6.2(d)(4) above (other than transfers of 
reserves to which Lenders have attributed value in determining the Borrowing 
Base); provided further that the agreement of all Lenders shall be required 
in order to: (a) waive or consent to any default in the timely payment of 
principal or interest, (b) approve any release of all or substantially all of 
the Collateral, (c) change any interest rate or fee payable with respect to 
the Loan, (d) change the Maximum Loan Amount, (e) extend the Amortization 
Period or the Revolving Period, (f) on or before the Commitment Expiration 
Date (Facility B), determine the Borrowing Base (Conforming) or the Borrowing 
Base (Supplemental), and (g) after the Commitment Expiration Date (Facility 
B), increase the Borrowing Base (Conforming) from the Borrowing Base 
(Conforming) previously in effect.

                                   ARTICLE IX

                                 MISCELLANEOUS

          Section 9.1.  WAIVER AND AMENDMENT.  No failure or delay by any 
Lender in exercising any right, power or remedy which it may have under any 
of the Loan Documents shall operate as a waiver thereof or of any other 
right, power or remedy, nor shall any single or partial exercise by any 
Lender of any such right, power or remedy preclude any other or further 
exercise thereof or of any other right, power or remedy. No waiver of any 
provision of any Loan Document and no consent to any departure therefrom 
shall ever be effective unless it is in writing and signed by all Lenders, 
and then such waiver or consent shall be effective only in the specific 
instances and for the purposes for which given and to the extent specified in 
such writing. No notice to or demand on Borrower shall in any case of itself 
entitle Borrower to any other or further notice or demand in similar or other 
circumstances. This Agreement and the other Loan Documents 

                                       56

<PAGE>

set forth the entire understanding between the parties hereto, and no 
modification or amendment of or supplement to this Agreement or the other 
Loan Documents shall be valid or effective unless the same is in writing and 
signed by the party against whom it is sought to be enforced.

          Section 9.2.  SURVIVAL OF AGREEMENTS; CUMULATIVE NATURE.  All of 
Borrower's various representations, warranties, covenants and agreements in 
the Loan Documents shall survive the execution and delivery of this Agreement 
and the other Loan Documents and the performance hereof and thereof, 
including without limitation the making or granting of the Loan and the 
delivery of the Notes and the other Loan Documents, and shall further survive 
until all of the Obligations are paid in full to Lenders and all of Lenders' 
obligations to Borrower are terminated. All statements and agreements 
contained in any certificate or other instrument delivered by Borrower to any 
Lender under any Loan Document shall be deemed representations and warranties 
by Borrower to Lenders and/or agreements and covenants of Borrower under this 
Agreement. The representations, warranties, and covenants made by Borrower in 
the Loan Documents, and the rights, powers, and privileges granted to Lenders 
in the Loan Documents, are cumulative, and no Loan Document shall be 
construed in the context of another to diminish, nullify, or otherwise reduce 
the benefit to any Lender of any such representation, warranty, covenant, 
right, power or privilege. In particular and without limitation, no exception 
set out in this Agreement to any representation, warranty or covenant herein 
contained shall apply to any similar representation, warranty or covenant 
contained in any other Loan Document, and each such similar representation, 
warranty or covenant shall be subject only to those exceptions which are 
expressly made applicable to it by the terms of the various Loan Documents.

          Section 9.3.  NOTICES.  All notices, requests, consents, demands 
and other communications required or permitted under any Loan Document shall 
be in writing and, unless otherwise specifically provided in such Loan 
Document, shall be deemed sufficiently given or furnished if delivered by 
personal delivery, by expedited delivery service with proof of delivery, or 
by registered or certified United States mail, return receipt requested, 
postage prepaid, at the addresses specified below (unless changed by similar 
notice in writing given by the particular Person whose address is to be 
changed). Any such notice or communication shall be deemed to have been given 
either at the time of personal delivery or, in the case of delivery service 
or mail, as of the date of first attempted delivery at the address and in the 
manner provided herein (provided that the notifying party promptly takes 
reasonable steps to effect actual delivery if the first attempted delivery is 
unsuccessful):

                                       57

<PAGE>

Borrower's address:  370 Seventeenth Street
                     Suite 3400
                     Denver, Colorado  80202
                     Attention: Neil Stenbuck

NBNA's address:      901 Main Street, 64th Floor
                     Dallas, Texas 75283
                     Attention: Energy Banking Group

with an additional
 copy to NBNA at:    370 Seventeenth Street
                     Suite 3250
                     Denver, Colorado  80202
                     Attention: David C. Rubenking

USB's address:       918 Seventeenth Street, 3rd Floor
                     Denver, Colorado  80202
                     Attention: Kathryn A. Gaiter

Union's address:     500 North Akard Street
                     Suite 4200
                     Dallas, Texas  75201
                     Attention: Randall L. Osterberg

          Section 9.4.  PARTIES IN INTEREST.  All grants, covenants and 
agreements contained in the Loan Documents shall bind and inure to the 
benefit of the parties thereto and their respective successors and assigns; 
provided, however, that Borrower may not assign or transfer any of its rights 
or delegate any of its duties or obligations under any Loan Document without 
the prior consent of Lenders.

          Section 9.5.  GOVERNING LAW.  The Loan Documents shall be deemed 
contracts and instruments made under the laws of the State of Colorado and 
shall be construed and enforced in accordance with and governed by the laws 
of the State of Colorado and the laws of the United States of America, 
except: (1) to the extent that the law of another jurisdiction is expressly 
elected in a Loan Document, and (2) with respect to specific Liens, or the 
perfection thereof, evidenced by Security Documents covering real or personal 
property which by the laws applicable thereto are required to be construed 
under the laws of another jurisdiction. Borrower hereby irrevocably submits 
itself to the non-exclusive jurisdiction of the state and federal courts of 
the State of Colorado.

          Section 9.6.  LIMITATION ON INTEREST.  Lenders and Borrower intend 
to contract in strict compliance with applicable usury law from time to time 
in effect. In furtherance thereof such persons stipulate and agree that none 

                                       58

<PAGE>

of the terms and provisions contained in the Loan Documents shall ever be 
construed to create a contract to pay, for the use, forbearance or detention 
of money, interest in excess of the maximum amount of interest permitted to 
be charged by applicable law from time to time in effect. Neither Borrower 
nor any present or future guarantors, endorsers, or other Persons hereafter 
becoming liable for payment of any Obligation shall ever be liable for 
unearned interest thereon or shall ever be required to pay interest thereon 
in excess of the maximum amount that may be lawfully charged under applicable 
law from time to time in effect, and the provisions of this section shall 
control over all other provisions of the Loan Documents which may be in 
conflict or apparent conflict herewith. Lenders expressly disavow any 
intention to charge or collect excessive unearned interest or finance charges 
in the event the maturity of any Obligation is accelerated. If: (a) the 
maturity of any Obligation is accelerated for any reason, (b) any Obligation 
is prepaid and as a result any amounts held to constitute interest are 
determined to be in excess of the legal maximum, or (c) any Lender or any 
other holder of any or all of the Obligations shall otherwise collect moneys 
which are determined to constitute interest which would otherwise increase 
the interest on any or all of the Obligations to an amount in excess of that 
permitted to be charged by applicable law then in effect, then all such sums 
determined to constitute interest in excess of such legal limit shall, 
without penalty, be promptly applied to reduce the then outstanding principal 
of the related Obligations or, at Lenders' option, promptly returned to 
Borrower or the other payor thereof upon such determination.

          Section 9.7.  SEVERABILITY.  If any term or provision of any Loan 
Document shall be determined to be illegal or unenforceable all other terms 
and provisions of the Loan Documents shall nevertheless remain effective and 
shall be enforced to the fullest extent permitted by applicable law.

          Section 9.8.  COUNTERPARTS.  This Agreement may be separately 
executed in any number of counterparts and by different parties hereto in 
separate counterparts, each of which when so executed shall be deemed to 
constitute one and the same Agreement.

          Section 9.9.  CONFLICTS.  To the extent of any irreconcilable 
conflicts between the provisions of this Agreement and the provisions of any 
of the Loan Documents, the provisions of this Agreement shall prevail.

          Section 9.10.  WAIVER OF JURY TRIAL, PUNITIVE DAMAGES, ETC. EACH OF 
BORROWER, AGENT AND LENDERS HEREBY KNOWINGLY, VOLUNTARILY, INTENTIONALLY, AND 
IRREVOCABLY:  

                                       59

<PAGE>

(a) WAIVES, TO THE MAXIMUM EXTENT NOT PROHIBITED BY LAW, ANY RIGHT IT MAY 
HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED HEREON, OR 
DIRECTLY OR INDIRECTLY AT ANY TIME ARISING OUT OF, UNDER OR IN CONNECTION 
WITH THE LOAN DOCUMENTS OR ANY TRANSACTION CONTEMPLATED THEREBY OR ASSOCIATED 
THEREWITH, BEFORE OR AFTER MATURITY; (b) WAIVES, TO THE MAXIMUM EXTENT NOT 
PROHIBITED BY LAW, ANY RIGHT IT MAY HAVE TO CLAIM OR RECOVER IN ANY SUCH 
LITIGATION ANY SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES, OR 
DAMAGES OTHER THAN, OR IN ADDITION TO, ACTUAL DAMAGES; (c) CERTIFIES THAT NO 
PARTY HERETO NOR ANY REPRESENTATIVE OR AGENT OR COUNSEL FOR ANY PARTY HERETO 
HAS REPRESENTED, EXPRESSLY OR OTHERWISE, OR IMPLIED THAT SUCH PARTY WOULD 
NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVERS, AND 
(d) ACKNOWLEDGES THAT IT HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT, THE 
OTHER LOAN DOCUMENTS AND THE TRANSACTIONS CONTEMPLATED HEREBY AND THEREBY BY, 
AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS CONTAINED IN THIS 
SECTION.

          Section 9.11.  SUPERSESSION.  Upon the repayment of all amounts due 
under or in connection with the Prior Credit Agreement, the terms of this 
Agreement shall supersede the terms of the Prior Credit Agreement in their 
entirety.

          IN WITNESS WHEREOF, this Agreement is executed as of the date first 
above written.


                                       BASIN EXPLORATION, INC.


                                       By: /s/ Michael S. Smith
                                          ---------------------------
                                          Michael S. Smith,
                                          President



                                       NATIONSBANK, N.A., as a LENDER,
                                        AGENT and COLLATERAL AGENT


                                       By: /s/ David C. Rubenking
                                          ---------------------------
                                          David C. Rubenking,
                                          Senior Vice President



                                       U.S. BANK NATIONAL ASSOCIATION


                                       By: /s/ Kathryn A. Gaiter
                                          ---------------------------
                                          Kathryn A. Gaiter,
                                          Vice President

                                       60

<PAGE>

                                       UNION BANK OF CALIFORNIA, N.A.


                                       By: /s/ Randall L. Osterberg
                                          ---------------------------
                                          Randall L. Osterberg,
                                          Vice President


                                       By: [Illegible]
                                          ---------------------------
                                                                     
                                          ---------------------------,
                                          Senior Vice President

                                       61

<PAGE>

                                     SCHEDULE 1

                                DISCLOSURE SCHEDULE

1.  Section 5.1(f). Changes in Financial Position.

          Borrower follows the full-cost method of accounting for oil and gas
     properties. Under this method, all costs associated with the development,
     exploration and acquisition of oil and gas properties are capitalized. If
     capitalized costs, net of amortization and related deferred taxes, exceed
     the full-cost ceiling, the excess would be expensed in the period such
     excess occurs. Calculation of the full-cost ceiling includes an estimate
     of the discounted value of future net revenue attributable to proved
     reserves using various assumptions and parameters consistent with
     promulgations of the Securities and Exchange Commission, and such
     calculation is sensitive to changes in prevailing oil and gas prices.

          Oil and natural gas prices are volatile and reflect seasonal factors,
     as well as other supply and demand conditions. Declines in prices at
     December 31, 1998, or in the future, could result in a requirement that
     Borrower recognize an impairment expense at December 31, 1998 or in a
     future period.

2.   Section 5.1(g). Other Obligations.       NONE

3.   Section 5.1(i).  Litigation.       NONE

4.   Section 5.1(j).  ERISA Liabilities.

          In connection with reductions in Borrower's staff during 1996,
     Borrower voluntarily treated some departing staff members as having been
     vested in Borrower's pension plan, even though such staff members may not
     have qualified for such vesting under the express provisions of the plan. 
     On or about August 31, 1996, a partial plan termination relating to
     accelerated vesting occurred with respect to Borrower's 401(k) plan.

5.   Section 5.1(m).  Names and Places of Business.

          Other names: Basin Operating Company

          Former address of chief executive office:

               633 Seventeenth Street
               Denver, Colorado 80202

          Address of Borrower's Houston office:

               1001 Fannin Street
               Houston, Texas 77002

                                       1-1

<PAGE>

                                    EXHIBIT A-1

                                  PROMISSORY NOTE

$40,000,000                                       January 1, 1999
                                                  Denver, Colorado

          FOR VALUE RECEIVED, BASIN EXPLORATION, INC., a Delaware corporation 
("Borrower"), promises to pay to the order of NATIONSBANK, N.A. ("Payee"), 
the principal sum of $40,000,000, or so much thereof as may be advanced 
hereunder, together with interest on the outstanding balance of such 
principal amount at the rates provided below.

          This Note in part represents a refinancing and a continuation of 
the indebtedness evidenced by a Promissory Note dated November 22, 1994, as 
amended, made by Borrower, payable to the order of Payee's predecessor, in 
the face amount of $34,000,000. This Note is issued pursuant to, and is 
subject to the terms and provisions of, the Amended and Restated Credit 
Agreement dated as of January 1, 1999, among Borrower, Payee, U.S. Bank 
National Association, and Union Bank of California, N.A., as heretofore or 
hereafter amended, modified, extended, restated or replaced (the "Credit 
Agreement"). Except as otherwise defined herein, terms defined in the Credit 
Agreement shall have the same meanings when used herein.

          The outstanding principal amount of this Note shall be due and 
payable as provided in the Credit Agreement, in monthly installments due on 
the last day of each calendar month, as described in the Credit Agreement. 
The entire outstanding principal balance of this Note shall be due and 
payable on December 31, 2010 (unless due and payable sooner pursuant to the 
terms of the Credit Agreement) and shall bear interest as provided in the 
Credit Agreement.

          Interest shall accrue daily and shall be due and payable as 
provided in the Credit Agreement.

          All payments of principal and interest hereon shall be made at 
Payee's offices at 901 Main Street, 64th Floor, Dallas, Texas 75283, 
Attention: Energy Banking Group, or at such other place as Payee shall have 
designated to Borrower in writing by 10:00 A.M. Denver time on the date due 
or the date of prepayment (as the case may be) in immediately available funds 
and without set-off or counterclaim or deduction of any kind. All payments 
received hereunder shall be applied first to costs of collection, second to 
accrued interest as of the date of payment and third to the outstanding 
principal balance of this Note.

                                     A-1-1

<PAGE>

          Notwithstanding anything to the contrary contained in this Note, 
from and after the expiration of any applicable period of grace provided for 
in the Credit Agreement, overdue principal, and (to the extent permitted 
under applicable law) overdue interest, whether caused by acceleration of 
maturity or otherwise, shall bear interest at a fluctuating rate, adjustable 
the day of any change in such rate, equal to five percentage points above the 
Base Rate, until paid, and shall be payable monthly or, at the option of the 
holder hereof, on demand.

          It is not intended hereby to charge interest at a rate in excess of 
the maximum rate of interest that Payee may charge to Borrower under 
applicable usury and other laws, but if, notwithstanding, interest in excess 
of such rate shall be paid hereunder, the interest rate on this Note shall be 
adjusted to the maximum permitted under applicable law during the period or 
periods that the interest rate otherwise provided herein would exceed such 
rate and any excess amount applied at Payee's option to reduce the 
outstanding principal balance of this Note or to be returned to Borrower.

          This Note is secured by, and the holder of this Note is entitled to 
the benefits of, the documents described in the Credit Agreement (the 
"Security Documents"). Reference is made to the Security Documents for a 
description of the property covered thereby and the rights, remedies and 
obligations of the holder hereof in respect thereto.

          Subject to the expiration of any applicable period of grace 
provided for in the Credit Agreement, in the event of: (a) any default in any 
payment of the principal of or interest on this Note when due and payable, or 
(b) any other "Event of Default" (as such term is defined in the Credit 
Agreement), then the whole principal sum of this Note plus accrued interest 
and all other obligations of Borrower to holder, direct or indirect, absolute 
or contingent, now existing or hereafter arising, shall, at the option of 
Payee, become immediately due and payable, and any or all of the rights and 
remedies provided herein and in the Credit Agreement and the Security 
Documents, as they may be amended, modified or supplemented from time to 
time, may be exercised by Payee.

          If Borrower fails to pay any amount due under this Note and Payee 
has to take any action to collect the amount due or to exercise its rights 
under the Security Documents, including without limitation retaining 
attorneys for collection of this Note, or if any suit or proceeding is 
brought for the recovery of all or any part of or for protection of the 
indebtedness or to foreclose the Security Documents or to enforce Payee's 
rights under the Security Documents, then Borrower agrees to pay on demand 
all reasonable costs and expenses of any such action to collect, suit or 
proceeding, or any appeal of any such suit or 

                                     A-1-2

<PAGE>

proceeding, incurred by Payee, including without limitation the reasonable 
fees and disbursements of Payee's attorneys and their staff.

          Borrower waives presentment, notice of dishonor and protest, and 
assents to any extension of time with respect to any payment due under this 
Note, to any substitution or release of collateral and to the addition or 
release of any party, except as provided in the Credit Agreement. No waiver 
of any payment or other right under this Note shall operate as a waiver of 
any other payment or right.

          If any provision in this Note shall be held invalid, illegal or 
unenforceable in any jurisdiction, the validity, legality or enforceability 
of any defective provisions shall not be in any way affected or impaired in 
any other jurisdiction.

          No delay or failure of the holder of this Note in the exercise of 
any right or remedy provided for hereunder shall be deemed a waiver of such 
right by the holder hereof, and no exercise of any right or remedy shall be 
deemed a waiver of any other right or remedy that the holder may have.

          All notices given hereunder shall be given as provided in the 
Credit Agreement.

          At the option of the holder hereof, an action may be brought to 
enforce this Note in the District Court in and for the City and County of 
Denver, State of Colorado, in the United States District Court for the 
District of Colorado or in any other court in which venue and jurisdiction 
are proper. Borrower and all signers or endorsers hereof consent to venue and 
jurisdiction in the District Court in and for the City and County of Denver, 
State of Colorado and in the United States District Court for the District of 
Colorado and to service of process under Sections 13-1-124(1)(a) and 
13-1-125, Colorado Revised Statutes (1992), as amended, in any action 
commenced to enforce this Note.

          This Note is to be governed by and construed according to the laws 
of the State of Colorado.


                                       BASIN EXPLORATION, INC.


                                       By: 
                                          ---------------------------
                                          Michael S. Smith,
                                          President

                                     A-1-3

<PAGE>

                                 EXHIBIT A-2

                               PROMISSORY NOTE

$40,000,000                                       January 1, 1999
                                                  Denver, Colorado

          FOR VALUE RECEIVED, BASIN EXPLORATION, INC., a Delaware corporation 
("Borrower"), promises to pay to the order of U.S. BANK NATIONAL ASSOCIATION 
("Payee"), the principal sum of $40,000,000, or so much thereof as may be 
advanced hereunder, together with interest on the outstanding balance of such 
principal amount at the rates provided below.

          This Note in part represents a refinancing and a continuation of 
the indebtedness evidenced by a Promissory Note dated November 22, 1994, as 
amended, made by Borrower, payable to the order of Payee's predecessor, in 
the face amount of $34,000,000. This Note is issued pursuant to, and is 
subject to the terms and provisions of, the Amended and Restated Credit 
Agreement dated as of January 1, 1999, among Borrower, Payee, Nationsbank, 
N.A., and Union Bank of California, N.A., as heretofore or hereafter amended, 
modified, extended, restated or replaced (the "Credit Agreement"). Except as 
otherwise defined herein, terms defined in the Credit Agreement shall have 
the same meanings when used herein.

          The outstanding principal amount of this Note shall be due and 
payable as provided in the Credit Agreement, in monthly installments due on 
the last day of each calendar month, as described in the Credit Agreement. 
The entire outstanding principal balance of this Note shall be due and 
payable on December 31, 2010 (unless due and payable sooner pursuant to the 
terms of the Credit Agreement) and shall bear interest as provided in the 
Credit Agreement.

          Interest shall accrue daily and shall be due and payable as 
provided in the Credit Agreement.

          All payments of principal and interest hereon shall be made at 
Payee's offices at 918 Seventeenth Street, Denver, Colorado 80202, or at such 
other place as Payee shall have designated to Borrower in writing by 10:00 
A.M. Denver time on the date due or the date of prepayment (as the case may 
be) in immediately available funds and without set-off or counterclaim or 
deduction of any kind. All payments received hereunder shall be applied first 
to costs of collection, second to accrued interest as of the date of payment 
and third to the outstanding principal balance of this Note.

                                     A-2-1

<PAGE>

          Notwithstanding anything to the contrary contained in this Note, 
from and after the expiration of any applicable period of grace provided for 
in the Credit Agreement, overdue principal, and (to the extent permitted 
under applicable law) overdue interest, whether caused by acceleration of 
maturity or otherwise, shall bear interest at a fluctuating rate, adjustable 
the day of any change in such rate, equal to five percentage points above the 
Base Rate, until paid, and shall be payable monthly or, at the option of the 
holder hereof, on demand.

          It is not intended hereby to charge interest at a rate in excess of 
the maximum rate of interest that Payee may charge to Borrower under 
applicable usury and other laws, but if, notwithstanding, interest in excess 
of such rate shall be paid hereunder, the interest rate on this Note shall be 
adjusted to the maximum permitted under applicable law during the period or 
periods that the interest rate otherwise provided herein would exceed such 
rate and any excess amount applied at Payee's option to reduce the 
outstanding principal balance of this Note or to be returned to Borrower.

          This Note is secured by, and the holder of this Note is entitled to 
the benefits of, the documents described in the Credit Agreement (the 
"Security Documents"). Reference is made to the Security Documents for a 
description of the property covered thereby and the rights, remedies and 
obligations of the holder hereof in respect thereto.

          Subject to the expiration of any applicable period of grace 
provided for in the Credit Agreement, in the event of: (a) any default in any 
payment of the principal of or interest on this Note when due and payable, or 
(b) any other "Event of Default" (as such term is defined in the Credit 
Agreement), then the whole principal sum of this Note plus accrued interest 
and all other obligations of Borrower to holder, direct or indirect, absolute 
or contingent, now existing or hereafter arising, shall, at the option of 
Payee, become immediately due and payable, and any or all of the rights and 
remedies provided herein and in the Credit Agreement and the Security 
Documents, as they may be amended, modified or supplemented from time to 
time, may be exercised by Payee.

          If Borrower fails to pay any amount due under this Note and Payee 
has to take any action to collect the amount due or to exercise its rights 
under the Security Documents, including without limitation retaining 
attorneys for collection of this Note, or if any suit or proceeding is 
brought for the recovery of all or any part of or for protection of the 
indebtedness or to foreclose the Security Documents or to enforce Payee's 
rights under the Security Documents, then Borrower agrees to pay on demand 
all reasonable costs and expenses of any such action to collect, suit or 
proceeding, or any appeal of any such suit or 

                                     A-2-2

<PAGE>

proceeding, incurred by Payee, including without limitation the reasonable 
fees and disbursements of Payee's attorneys and their staff.

          Borrower waives presentment, notice of dishonor and protest, and 
assents to any extension of time with respect to any payment due under this 
Note, to any substitution or release of collateral and to the addition or 
release of any party, except as provided in the Credit Agreement. No waiver 
of any payment or other right under this Note shall operate as a waiver of 
any other payment or right.

          If any provision in this Note shall be held invalid, illegal or 
unenforceable in any jurisdiction, the validity, legality or enforceability 
of any defective provisions shall not be in any way affected or impaired in 
any other jurisdiction.

          No delay or failure of the holder of this Note in the exercise of 
any right or remedy provided for hereunder shall be deemed a waiver of such 
right by the holder hereof, and no exercise of any right or remedy shall be 
deemed a waiver of any other right or remedy that the holder may have.

          All notices given hereunder shall be given as provided in the 
Credit Agreement.

          At the option of the holder hereof, an action may be brought to 
enforce this Note in the District Court in and for the City and County of 
Denver, State of Colorado, in the United States District Court for the 
District of Colorado or in any other court in which venue and jurisdiction 
are proper. Borrower and all signers or endorsers hereof consent to venue and 
jurisdiction in the District Court in and for the City and County of Denver, 
State of Colorado and in the United States District Court for the District of 
Colorado and to service of process under Sections 13-1-124(1)(a) and 
13-1-125, Colorado Revised Statutes (1992), as amended, in any action 
commenced to enforce this Note.

          This Note is to be governed by and construed according to the laws 
of the State of Colorado.


                                       BASIN EXPLORATION, INC.


                                       By: 
                                          ---------------------------
                                          Michael S. Smith,
                                          President

                                     A-2-3

<PAGE>

                                   EXHIBIT A-3

                                 PROMISSORY NOTE

$30,000,000                                       January 1, 1999
                                                  Denver, Colorado

          FOR VALUE RECEIVED, BASIN EXPLORATION, INC., a Delaware corporation 
("Borrower"), promises to pay to the order of UNION BANK OF CALIFORNIA, N.A. 
("Payee"), the principal sum of $30,000,000, or so much thereof as may be 
advanced hereunder, together with interest on the outstanding balance of such 
principal amount at the rates provided below.

          This Note in part represents a refinancing and a continuation of 
the indebtedness evidenced by a Promissory Note dated November 22, 1994, as 
amended, made by Borrower, payable to the order of Payee's predecessor, in 
the face amount of $34,000,000. This Note is issued pursuant to, and is 
subject to the terms and provisions of, the Amended and Restated Credit 
Agreement dated as of January 1, 1999, among Borrower, Payee, Nationsbank, 
N.A. and U.S. Bank National Association, as heretofore or hereafter amended, 
modified, extended, restated or replaced (the "Credit Agreement"). Except as 
otherwise defined herein, terms defined in the Credit Agreement shall have 
the same meanings when used herein.

          The outstanding principal amount of this Note shall be due and 
payable as provided in the Credit Agreement, in monthly installments due on 
the last day of each calendar month, as described in the Credit Agreement. 
The entire outstanding principal balance of this Note shall be due and 
payable on December 31, 2010 (unless due and payable sooner pursuant to the 
terms of the Credit Agreement) and shall bear interest as provided in the 
Credit Agreement.

          Interest shall accrue daily and shall be due and payable as 
provided in the Credit Agreement.

          All payments of principal and interest hereon shall be made at 
Payee's offices at 500 North Akard Street, Suite 4200, Dallas, Texas 75201, 
or at such other place as Payee shall have designated to Borrower in writing 
by 10:00 A.M. Denver time on the date due or the date of prepayment (as the 
case may be) in immediately available funds and without set-off or 
counterclaim or deduction of any kind. All payments received hereunder shall 
be applied first to costs of collection, second to accrued interest as of the 
date of payment and third to the outstanding principal balance of this Note.

                                     A-3-1

<PAGE>

          Notwithstanding anything to the contrary contained in this Note, 
from and after the expiration of any applicable period of grace provided for 
in the Credit Agreement, overdue principal, and (to the extent permitted 
under applicable law) overdue interest, whether caused by acceleration of 
maturity or otherwise, shall bear interest at a fluctuating rate, adjustable 
the day of any change in such rate, equal to five percentage points above the 
Base Rate, until paid, and shall be payable monthly or, at the option of the 
holder hereof, on demand.

          It is not intended hereby to charge interest at a rate in excess of 
the maximum rate of interest that Payee may charge to Borrower under 
applicable usury and other laws, but if, notwithstanding, interest in excess 
of such rate shall be paid hereunder, the interest rate on this Note shall be 
adjusted to the maximum permitted under applicable law during the period or 
periods that the interest rate otherwise provided herein would exceed such 
rate and any excess amount applied at Payee's option to reduce the 
outstanding principal balance of this Note or to be returned to Borrower.

          This Note is secured by, and the holder of this Note is entitled to 
the benefits of, the documents described in the Credit Agreement (the 
"Security Documents"). Reference is made to the Security Documents for a 
description of the property covered thereby and the rights, remedies and 
obligations of the holder hereof in respect thereto.

          Subject to the expiration of any applicable period of grace 
provided for in the Credit Agreement, in the event of: (a) any default in any 
payment of the principal of or interest on this Note when due and payable, or 
(b) any other "Event of Default" (as such term is defined in the Credit 
Agreement), then the whole principal sum of this Note plus accrued interest 
and all other obligations of Borrower to holder, direct or indirect, absolute 
or contingent, now existing or hereafter arising, shall, at the option of 
Payee, become immediately due and payable, and any or all of the rights and 
remedies provided herein and in the Credit Agreement and the Security 
Documents, as they may be amended, modified or supplemented from time to 
time, may be exercised by Payee.

          If Borrower fails to pay any amount due under this Note and Payee 
has to take any action to collect the amount due or to exercise its rights 
under the Security Documents, including without limitation retaining 
attorneys for collection of this Note, or if any suit or proceeding is 
brought for the recovery of all or any part of or for protection of the 
indebtedness or to foreclose the Security Documents or to enforce Payee's 
rights under the Security Documents, then Borrower agrees to pay on demand 
all reasonable costs and expenses of any such action to collect, suit or 
proceeding, or any appeal of any such suit or 

                                     A-3-2

<PAGE>

proceeding, incurred by Payee, including without limitation the reasonable 
fees and disbursements of Payee's attorneys and their staff.

          Borrower waives presentment, notice of dishonor and protest, and 
assents to any extension of time with respect to any payment due under this 
Note, to any substitution or release of collateral and to the addition or 
release of any party, except as provided in the Credit Agreement. No waiver 
of any payment or other right under this Note shall operate as a waiver of 
any other payment or right.

          If any provision in this Note shall be held invalid, illegal or 
unenforceable in any jurisdiction, the validity, legality or enforceability 
of any defective provisions shall not be in any way affected or impaired in 
any other jurisdiction.

          No delay or failure of the holder of this Note in the exercise of 
any right or remedy provided for hereunder shall be deemed a waiver of such 
right by the holder hereof, and no exercise of any right or remedy shall be 
deemed a waiver of any other right or remedy that the holder may have.

          All notices given hereunder shall be given as provided in the 
Credit Agreement.

          At the option of the holder hereof, an action may be brought to 
enforce this Note in the District Court in and for the City and County of 
Denver, State of Colorado, in the United States District Court for the 
District of Colorado or in any other court in which venue and jurisdiction 
are proper. Borrower and all signers or endorsers hereof consent to venue and 
jurisdiction in the District Court in and for the City and County of Denver, 
State of Colorado and in the United States District Court for the District of 
Colorado and to service of process under Sections 13-1-124(1)(a) and 
13-1-125, Colorado Revised Statutes (1992), as amended, in any action 
commenced to enforce this Note.

          This Note is to be governed by and construed according to the laws 
of the State of Colorado.


                                       BASIN EXPLORATION, INC.


                                       By:
                                          ---------------------------
                                          Michael S. Smith,
                                          President

                                     A-3-3

<PAGE>

                                   EXHIBIT B

                                ADVANCE REQUEST

                                   _______, 199_

Nationsbank, N.A.

Gentlemen:

          1.  This Advance Request is delivered to you pursuant to Section 
2.1(c) of the Amended and Restated Credit Agreement dated as of January 1, 
1999, as amended (the "Credit Agreement"), among Basin Exploration, Inc. 
("Borrower") and the Lenders named therein (collectively, "Lenders"). Except 
as otherwise defined herein, terms defined in the Credit Agreement shall have 
the same meanings when used herein.

          2.  Borrower hereby requests an Advance as follows:
              (a) Proposed Date of Advance:
              (b) Amount of Advance:
              (c) Facility A or Facility B:

          3.  Borrower hereby represents and warrants that as of the date 
hereof and as of the date of the Advance requested hereunder, all statements 
contained in Section 4.2 of the Credit Agreement are and will be true and 
correct in all material respects.

          4.  Borrower agrees that if, at any time prior to the date of the 
Advance requested by Borrower hereunder, any representation or warranty of 
Borrower contained herein is not true and correct as of such time, Borrower 
will immediately so notify Lenders. Except to the extent of any such 
notification by Borrower, the acceptance by Borrower of any Advance requested 
hereunder shall be deemed a re-certification by Borrower as of the date of 
such Advance of the representations and warranties made by Borrower herein.


                                       BASIN EXPLORATION, INC.


                                       By:
                                          ---------------------------
                                          Title:

                                       B-1

<PAGE>

                                     EXHIBIT C

                      REQUEST FOR ISSUANCE OF LETTER OF CREDIT

                                   ________, 199_

Nationsbank, N.A.

Gentlemen:

          1.  This Request for Issuance of Letter of Credit is delivered to 
you pursuant to Section 2.1(c) of the Amended and Restated Credit Agreement 
dated as of January 1, 1999, as amended (the "Credit Agreement"), among Basin 
Exploration, Inc. ("Borrower") and the Lenders named therein (collectively, 
"Lenders"). Except as otherwise defined herein, terms defined in the Credit 
Agreement shall have the same meanings when used herein.

          2.  Borrower hereby requests that Lenders issue a Letter of Credit 
as follows:

              (a) Name of Beneficiary:
              (b) Proposed Issuance Date:
              (c) Expiration Date:
              (d) Face Amount:
              (e) Payment Instructions (if any):
              (f) Facility A or Facility B:

          3.  Borrower hereby represents and warrants that as of the date 
hereof and as of the date of issuance of the requested Letter of Credit, all 
statements contained in Section 4.2 of the Credit Agreement are and will be 
true and correct in all material respects.

          4.  Borrower agrees that if, at any time prior to the date of 
issuance of the Letter of Credit requested by Borrower hereunder, any 
representation or warranty of Borrower contained herein is not true and 
correct as of such time, Borrower will immediately so notify Lenders. Except 
to the extent of any such notification by Borrower, the acceptance by 
Borrower of any Letter of Credit requested hereunder shall be deemed a 
re-certification by Borrower as of the date of such Advance of the 
representations and warranties made by Borrower herein.


                                       BASIN EXPLORATION, INC.


                                       By:
                                          ---------------------------
                                          Title:

                                       C-1

<PAGE>

                                    EXHIBIT D

                                  RATE ELECTION

                                   ________, 199_

Nationsbank, N.A.

Gentlemen:

          1.  This Rate Election is delivered to you pursuant to Section 
2.8(a) of the Amended and Restated Credit Agreement dated as of January 1, 
1999, as amended (the "Credit Agreement"), among Basin Exploration, Inc. 
("Borrower") and the Lenders named therein (collectively, "Lenders"). Except 
as otherwise defined herein, terms defined in the Credit Agreement shall have 
the same meanings when used herein.

          2.  Borrower hereby elects a Fixed Rate Portion as follows:

              (a) Amount of Fixed Rate Portion:
              (b) Beginning Date of Interest Period:
              (c) Length of Interest Period (Months):
              (d) Facility A or Facility B:

          3.  Borrower hereby represents and warrants that as of the date 
hereof and as of the requested beginning date of the Interest Period, all 
statements contained in Section 4.2 of the Credit Agreement are and will be 
true and correct in all material respects.

          4.  Borrower agrees that if, at any time prior to the beginning 
date of the Interest Period requested by Borrower hereunder, any 
representation or warranty of Borrower contained herein is not true and 
correct as of such time, Borrower will immediately so notify Lenders. Except 
to the extent of any such notification by Borrower, the beginning of any 
Interest Period as to any Fixed Rate Portion requested hereunder shall be 
deemed a re-certification by Borrower as of such date of the representations 
and warranties made by Borrower herein.

          5.  On the date hereof, the Usage Ratio is _________.


                                       BASIN EXPLORATION, INC.


                                       By:
                                          ---------------------------
                                          Title:

                                       D-1

<PAGE>

                                 EMPLOYMENT AGREEMENT


     THIS EMPLOYMENT AGREEMENT is entered into this 28th day of January, 
1999, between BASIN EXPLORATION, INC., a Delaware corporation (the 
"Corporation"), and PATRICK A. JACKSON (the "Officer").

                                       RECITAL

     The Officer has accepted the Corporation's appointment as the 
Corporation's Vice President of Onshore Exploration, and the Corporation and 
the Officer desire to set forth herein the terms and conditions of his 
employment.

                                      AGREEMENT

     The parties hereto agree as follows:

     1.  AGREEMENT TO SERVE.

          1.1 TITLE.  The Corporation shall employ the Officer and the 
Officer shall serve in the employ of the Corporation as its Vice President of 
Onshore Exploration to establish, implement and direct an exploration and 
development program in the onshore areas of the United States and such other 
areas as may from time to time be directed or requested by the Corporation 
acting through its President.

          1.2 DUTIES.  The Officer shall assume and discharge the 
responsibilities of Vice President (as set forth in the Bylaws of the 
Corporation), as well as such other responsibilities as may be assigned to 
him by the Board of Directors (the "Board") of the Corporation and as are 
appropriate to the offices he holds. Such responsibilities shall include, 
without limitation, those activities allocated to the position in an Onshore 
Business Plan to be developed by the Officer in conjunction with other 
executives of the Corporation (the "Plan") including the hiring and direction 
of geoscientists and support personnel consistent with the Plan.  The Officer 
shall perform his responsibilities to the best of his abilities and shall 
devote his entire business time and attention to the good faith performance 
of his responsibilities.  The Officer shall report to the Corporation's Chief 
Executive Officer.  The Officer shall maintain his offices at both the 
Corporation's offices in Houston, Texas and in Denver, Colorado until the 
first to occur of (i) the Officer determines to relocate to Denver full time 
or (ii) the Corporation determines, no sooner than September 2000, to assign 
a primary location to the Officer in either Houston or Denver. This decision 
will integrate such factors as relative activity levels between the Houston 
and Denver offices and continuity of senior management decision-making and 
communication.  Attached as Exhibit A are the terms and conditions governing 
the Officer's commuting and relocation.

<PAGE>

          1.3 TERMINATION OF PRESENT EMPLOYMENT.  No later than January 31, 
1999, the Officer will give notice of termination of his Employment Agreement 
with Amoco Production Company ("Amoco").  The Officer represents to the 
Corporation that he is under no contractual or other restriction with Amoco 
that would prevent him from terminating his employment with that company or 
from accepting employment with the Corporation or that would subject the 
Corporation to liability for negotiating and executing this Agreement with 
the Officer.  

     2.  TERMS OF EMPLOYMENT.

          2.1 BASIC TERM.  The term of the Officer's employment under this 
Agreement (the "Term") shall commence on February 1, 1999, and end three 
years from the commencement date.  After the Term, if the Officer continues 
as the Vice President of Onshore Exploration of the Corporation, the 
Corporation will enter into a separate agreement to provide protection 
against Termination Upon a Change of Control, with compensation no less 
favorable to the Officer than the compensation provided for in Sections 2.7, 
4.1(a), 4.1(c), 4.1(d) and 4.1(e) of this Agreement or the compensation 
provided for in the change of control agreements accorded other vice 
presidents of the Corporation.  The Officer has the right to elect which 
arrangement shall apply.

          2.2 TERMINATION FOR CAUSE.  The Corporation shall have the right to 
terminate the Officer for cause and said termination shall be effected by 
written notification to Officer.  Grounds for termination for cause shall 
include only, (i) the Officer's material breach of any terms of this 
Agreement,  if such material breach has not been substantially cured within 
thirty (30) days following written notice to the Officer from the Corporation 
of such breach setting forth with specificity the nature of the breach or, if 
cure cannot reasonably be effected within such 30-day period, if the Officer 
does not commence such cure within such 30-day period and thereafter pursue 
such cure continuously and with due diligence until cure has been effected; 
(ii) willful and continual failure or refusal to (a) follow written policies 
or directives established by the Board of Directors of the Corporation or (b) 
perform Officer's duties set forth in Section 1.2 of this Agreement (other 
than failure resulting from the Officer's incapacity due to physical or 
mental illness); (iii) the Officer's willful dishonesty towards, fraud upon, 
felony crime against, deliberate material injury or material bad faith action 
with respect to, or deliberate or attempted injury to the Corporation; or 
(iv) the Officer's conviction for any felony crime (whether in connection 
with the Corporation's affairs or otherwise).  Upon the date of termination 
of his employment, the Corporation shall immediately pay all Accrued 
Compensation to the date of termination, but no other compensation or 
reimbursement of any kind, including, without limitation, the compensation 
contemplated by Article 4, and all of the Officer's stock options and other 
incentive compensation shall be void to the extent not previously exercised 
or vested.

          2.3 TERMINATION WITHOUT CAUSE OR FOR GOOD REASON.  The Corporation 
shall have the right, upon 30 days written notification to the Officer, to 
terminate the Officer's employment without cause.  The Officer shall have the 
right, upon 30 days written notification to the Corporation, to terminate the 
Officer's employment for Good Reason (as defined in Section 2.7(a)).  Upon 
any termination by the Corporation without cause or termination by the 
Officer for Good Reason in the absence of a Change in Control, (i) the 
Officer shall be paid all accrued salary, vested deferred 

                                       2
<PAGE>

compensation (other than pension plan or profit-sharing plan benefits, which 
will be paid in accordance with the applicable plan), any benefits then due 
under any plans of the Corporation in which the Officer is a participant,  
and any appropriate business expenses incurred by the Officer in connection 
with his duties hereunder, all to the effective date of termination ("Accrued 
Compensation"), and all compensation provided for in Section 4.1(b) and (ii) 
and all of the Officer's options shall be deemed fully vested and exercisable.

          2.4 DISABILITY.  If, during the Term of this Agreement, the 
Officer, in the reasonable judgment of the Chief Executive Officer of the 
Corporation, has failed to perform his duties under this Agreement on account 
of illness or physical or mental disability, which condition renders the 
Officer incapable of performing the duties of his office, and such condition 
continues for a period of more than six (6) consecutive months or for a total 
of six months during any 12-month period, the Corporation shall have the 
right to terminate the Officer's employment hereunder by written notification 
to the Officer and payment to the Officer of all Accrued Compensation to the 
date of termination, but no other compensation or reimbursement of any kind, 
without prejudice to his claims for payments from any benefit plans.

          2.5 DEATH.  In the event of the Officer's death during the Term of 
this Agreement, the Officer's employment shall be deemed to have terminated 
as of the last day of the month during which his death occurs, and the 
Corporation shall pay to his estate all Accrued Compensation to the date of 
termination, but no other compensation or reimbursement of any kind, unless 
provided by a welfare benefit plan for which the Officer is eligible as an 
employee of the Corporation or as otherwise provided by law (i.e. workers 
compensation law).

          2.6 VOLUNTARY TERMINATION.  In the event Sections 2.2, 2.3, and 2.7 
are not applicable, the Officer may, upon 30 days written notification to 
the Corporation, voluntarily terminate his employment hereunder.  Upon the 
date of termination of his employment, the Corporation shall immediately pay 
all Accrued Compensation to the date of termination, but no other 
compensation or reimbursement of any kind, including, without limitation, the 
compensation contemplated by Article 4.

          2.7 TERMINATION UPON A CHANGE IN CONTROL.  In the event of a 
Termination Upon a Change in Control, the Officer shall immediately be paid 
all Accrued Compensation and the severance compensation provided for in 
Section 4.1(c). "Termination Upon a Change in Control" shall mean a 
termination by the Corporation without Cause or a termination by the Officer 
for Good Reason (as defined below) of the Officer's employment with the 
Corporation, in each case following a "Change in Control" (as defined below).

               (a)  For purposes of this Agreement "Good Reason" shall 
include any of the following (without the Officer's express written consent):

                         (i)  the assignment to the Officer by the 
     Corporation of any duties materially inconsistent with, or a substantial 
     alteration in the nature or status of, the Officer's responsibilities as 
     contemplated by this Agreement;

                                       3
<PAGE>

                         (ii)  a reduction by the Corporation in the 
     Officer's compensation, benefits or perquisites as in effect during the 
     Term of this Agreement;

                         (iii)  a relocation of the Corporation's principal 
     offices to a location outside Denver, Colorado, or Houston, Texas, or 
     the Corporation's relocation of the Officer to any place other than the 
     offices of the Corporation located in Houston, Texas, or Denver, 
     Colorado, it being understood that such relocation shall not be deemed 
     to have occurred on the basis of reasonably required travel by the 
     Officer on the Corporation's business to an extent substantially 
     consistent with the Plan;

                         (iv)  any material breach by the Corporation of any 
     provision of this Agreement, if such material breach has not been cured 
     within thirty (30) days following written notice by the Officer to the 
     Corporation of such breach setting forth with specificity the nature of 
     the breach; or

                         (v)  any failure by the Corporation to obtain the 
     assumption and performance of this Agreement by any successor (by 
     merger, consolidation or otherwise) or assign of the Corporation.

               (b)  For purposes of this Agreement, "Change in Control" shall
mean the following: 

                         (i)  Any "person" or "group" (within the meaning
     of Sections 13(d) and 14(d)(2) of the Securities Exchange Act of 1934,
     as amended (the "1934 Act")), other than a trustee or other fiduciary
     holding securities under an employee benefit plan of the Corporation
     or Mr. Michael Smith (or his affiliates or associates) is or becomes
     the "beneficial owner" (as defined in Rule 13d-3 under the 1934 Act),
     directly or indirectly, of more than thirty-three and one-third
     percent (33-1/3%) of the then outstanding voting stock of the
     Corporation; or

                         (ii)  Individuals who, as of the date hereof,
     constitute the Board (and any new director whose election by the Board
     or whose nomination for election by the Corporation's stockholders is
     approved by a vote of at least two-thirds of the directors then still
     in office who either were directors as of the date hereof or whose
     election or nomination for election is subsequently so approved) cease
     for any reason to constitute a majority thereof; or

                                       4
<PAGE>

                         (iii)  The stockholders of the Corporation
     approve a merger or consolidation of the Corporation with any other
     corporation, other than a merger or consolidation which would result
     in the voting securities of the Corporation outstanding immediately
     prior thereto continuing to represent (either by remaining outstanding
     or by being converted into voting securities of the surviving entity)
     at least 51% of the combined voting power of the voting securities of
     the Corporation or such surviving entity outstanding immediately after
     such merger or consolidation, or the stockholders approve a plan of
     complete liquidation of the Corporation or an agreement for the sale
     or disposition by the Corporation of all or substantially all of the
     Corporation's assets; provided, however, that if the merger, plan of
     liquidation or sale of substantially all assets is not consummated
     following such stockholder approval and the transaction is abandoned,
     then the Change of Control shall be deemed not to have occurred; or

                         (iv)  Michael Smith voluntarily terminates his
     employment as Chief Executive Officer or his employment as Chief
     Executive Officer is terminated following any of the events described
     in subsections (i), (ii) or (iii) above, if the Officer elects to
     treat such occurrence as a Change of Control by written notice to the
     Corporation no later than 120 days from the date of termination of Mr.
     Smith's employment as Chief Executive Officer.    

               (c)  Notwithstanding anything else in this Agreement, solely 
in the event of a Termination Upon a Change in Control pursuant to Section 
2.7, the aggregate of the amount of severance compensation paid to the 
Officer under this Agreement or otherwise shall not include any amount that 
the Corporation is prohibited from deducting for federal income tax purposes 
by virtue of Section 280G of the Internal Revenue Code or any successor 
provision.

     3.  COMPENSATION.

          3.1 BASE SALARY.  The Corporation agrees to pay the Officer for his 
services hereunder a salary at the rate of $14,166.67 per month ("Base 
Salary") payable in equal semimonthly installments in arrears during the term 
of this Agreement. Such amount may be increased, but not decreased below the 
amount stated in this section 3.1, during the term of this Agreement.

          3.2 BENEFITS.  The Officer shall be entitled to participate in any 
of the Corporation's benefit and deferred compensation plans as are from time 
to time available to the officers of the Corporation, including the 
Corporation's 401(k) plan, medical and dental plans, and life and disability 
insurance plans (provided, however, that the Officer's benefits may be 
modified or the Officer may be denied participation in any such plan because 
of a condition or restriction imposed by law or regulation or third-party 
insurer or other provider relating to participation of officers).  

                                       5
<PAGE>

          3.3 BONUS.  The Officer shall be entitled to participate in the 
Corporation's bonus program applicable to other officers and employees of the 
Corporation, provided, however, that in determining the appropriate amount of 
the Officer's bonus for any period, the Board of Directors will take into 
account the amount, if any, of proceeds received by the Officer from the 
onshore overriding royalty plan described in Section 3.6. In addition, on 
February 15, 1999 the Corporation will pay to the Officer a bonus of $65,000 
(subject to required withholding taxes and other deductions required by law), 
subject to reduction or refund by the Officer to the Corporation when and to 
the extent, if any, (i) the Officer voluntarily terminates his employment 
with the Corporation pursuant to Section 2.6 within two years from the 
commencement of his employment hereunder, (ii) is terminated for cause as 
provided in Section 2.2, or (iii) receives prior to or during the term of 
this Agreement a severance payment from Amoco in connection with termination 
of his employment with Amoco.  The Officer agrees to attempt to use 
reasonable diligence to attempt to collect such severance payment from Amoco 
but shall not be obligated to pursue legal action.

          3.4 STOCK OPTIONS.  The Officer shall be granted an option under 
the Corporation's Equity Incentive Plan to purchase 60,000 shares of the 
Corporation's common stock, at a purchase price equal to the fair market 
value of the common stock at the close of business on November 30, 1998, such 
options to be incentive stock options to the extent permissible under Section 
422 of the Internal Revenue Code of 1986 or, at the Officer's election, 
non-qualified stock options if the Officer does not elect to meet the tests 
required under Section 422.  The options will vest in three equal 
installments over the three-year period commencing February 1, 1999, will be 
exercisable for the Term of this Agreement and for any additional period 
during the Officer is employed by the Corporation (to the extent vested at 
termination) and will have a term of ten years.  The exercise price may be 
paid by delivery to the Corporation of a properly executed notice of exercise 
together with irrevocable instructions to a broker to deliver to the 
Corporation the amount of the proceeds of the sale of all or a portion of the 
shares of stock or of a loan from the broker to the Officer necessary to pay 
the exercise price. The grant of stock options hereunder shall be 
memorialized by a written Stock Option Agreement on the Corporation's 
standard form, a copy of which is attached hereto as Exhibit B. The Officer 
shall be eligible to receive additional grants of incentive compensation 
under the Equity Incentive Plan at the discretion of the Compensation and 
Incentive Committee of the Board of Directors; provided, however, that the 
Officer shall  receive a guaranteed minimum grant of 5,000 performance shares 
during the Performance Cycle beginning in 1999 under the Corporation's 
Performance Shares Plan. 

          3.5 OTHER PERQUISITES.  The Officer shall be entitled to expense 
reimbursements, vacation and other benefits in accordance with the practices 
of the Corporation.

          3.6  OVERRIDING ROYALTY. The Officer shall be entitled to 
participate in an onshore overriding royalty plan to be established by the 
Corporation for the Officer, geoscientists hired by the Officer and other 
personnel on terms to be approved by the Compensation and Incentive Committee 
of the Board of Directors but providing for a total amount of available 
overriding royalty in the amount of 2.5% of the working interest acquired by 
the Corporation and its investors and program participants, an allocation to 
individual participants of no greater than .625%, and other 

                                       6
<PAGE>

terms and conditions comparable to the Gulf Coast Geoscientists Overriding 
Royalty Plan currently in effect for the Corporation's offshore activities. 

     4.  COMPENSATION UPON TERMINATION.

          4.1 CALCULATION AND PAYMENT OF COMPENSATION.

               (a) In the event the Officer's employment is terminated under 
Sections 2.3 or 2.7, the parties acknowledge that the Officer will sustain 
actual damages, the amount of which is indefinite, uncertain and difficult of 
exact ascertainment because of the uncertainties of successfully relocating 
and seeking a comparable position.  In order to avoid dispute as to the 
amount of such damages and the mutual expense and inconvenience such dispute 
would entail, the Corporation and the Officer have agreed hereby that the 
Corporation shall pay to the Officer compensation as provided in Sections 
4.1(b) or 4.1(c), as applicable.  It is hereby agreed that in the event of 
any such termination, the Officer shall receive such amounts as herein 
provided, not as a penalty, but as the Officer's agreed compensation and sole 
damages for the termination of this Agreement, in lieu of the Officer's proof 
of his actual damages on that account.  All such compensation shall be 
without prejudice to the Officer's right to receive all Accrued Compensation 
(as defined in Section 2.3) earned and unpaid up to the time of termination.

               (b) In the event the Corporation or the Officer terminates the 
Officer's employment at any time prior to the end of the Term pursuant to 
Section 2.3, then the Corporation shall pay compensation in an amount equal 
to the Officer's Base Salary (at the rate payable at the time of such 
termination) for the balance of the Term on the dates specified in Section 
3.1, plus a bonus for each year (or pro rata part thereof) remaining in the 
Term equal to the  average annualized bonus received by the Officer prior to 
termination. 

               (c) In the event the Officer's employment is terminated at any 
time prior to the end of the Term pursuant to Section 2.7, then the 
Corporation (i) shall pay to the Officer in a lump sum in cash within five 
(5) days of the date of termination an amount equal to three times the sum of 
(x) the Officer's Base Salary (calculated at the rate of his Base Salary for 
the 12 months preceding the date of termination) plus (y) a bonus equal to 
the average annualized bonus received by the Officer prior to termination, 
and (ii) shall make all of the Officer's options fully vested and 
exercisable.  

               (d) Following a termination under Section 2.3, the Officer may 
in the Officer's sole discretion, by delivery of a notice to the Corporation 
within thirty (30) days following such termination, elect to receive from the 
Corporation a lump sum payment by bank cashier's check equal to the present 
value of the flow of cash payments that would otherwise be paid to the 
Officer pursuant to Section 4.1.  Such present value shall be determined as 
of the date of delivery of the notice of election of the Officer and shall be 
based on a discount rate equal to the interest rate on 90-day U.S. Treasury 
Bills, as reported in the Wall Street Journal (or similar publication) on the 
date of delivery of the election notice.  If the Officer elects to receive a 
lump sum payment pursuant to this Section 4.1(d), the Corporation shall make 
such payment to the Officer 

                                       7
<PAGE>

within sixty (60) days following the date on which the Officer notifies the 
Corporation of the Officer's election.  

               (e) No deduction shall be made by the Corporation under this 
Section 4.1 for any compensation earned by the Officer from any other 
employment or for any other monies otherwise received by the Officer from any 
third parties subsequent to termination of employment hereunder.

     5. PROTECTION OF CORPORATION INTERESTS.

          5.1. CONFIDENTIALITY.  The Officer acknowledges that in the course 
of his employment by the Corporation he will receive, obtain or develop 
certain trade secrets, programs, geologic, geophysical, engineering and 
exploration data, and other confidential information relating to the 
Corporation's business. The Officer understands that such information is 
confidential and agrees not to reveal such information and knowledge to 
anyone outside the Corporation or use the information in competing with the 
Corporation for his own benefit while he is employed by the Corporation 
hereunder or for a period of three years following the termination of his 
employment with the Corporation, subject to Section 5.2(c) below with respect 
to the Officer's right to compete with the Corporation after termination of 
employment. Upon termination of employment, the Officer shall surrender to 
the Corporation all papers, documents, writings, work product and other 
property produced by him or coming into his possession during such 
employment.  The Officer agrees that all such material will at all times 
remain the property of the Corporation.  

          5.2. NONCOMPETE.  The Officer further understands and agrees that:

               (a)  During his employment hereunder the Officer shall not 
directly or indirectly, unless the Corporation gives its prior written 
consent:

                         (i)  consult with, act as agent for, or otherwise
     intentionally assist any Competitor to compete or prepare to compete
     with the Corporation in any of the Corporation's then businesses;

                         (ii)  own any interest (other than a passive 
     investment interest of not more than 5% of the voting securities) in any 
     Competitor; or

                         (iii)  take any action specifically intended to divert
     from the Corporation to any Competitor or to the Officer or any person
     directly or indirectly related thereto any opportunity which would be
     within the scope of the Corporation's existing or planned or
     contemplated business.

For purposes of this Agreement, a "Competitor" means any entity which at 
relevant times engages or is making plans to engage, in whole or in part, in 
the oil and gas exploration and production business.

                                       8
<PAGE>

               (b)  Prior to the effective date of termination of this 
Agreement, except in the performance of his duties for the Corporation, the 
Officer will not directly or indirectly, individually or as an agent, officer 
or employee of another, participate in or otherwise be involved in (i) the 
review, interpretation or evaluation of geological or geophysical data 
pertaining to, (ii) the negotiation, acquisition, or disposition of, or (iii) 
the supervision of the development of, in each case, "Prospects," which for 
purposes hereof are defined as those leads, opportunities, projects and other 
ideas identified or generated by the Corporation's employees or consultants 
or other parties during the Officer's employment under this Agreement; and

               (c)   After the effective date of termination of this 
Agreement, the Officer shall be released of the foregoing covenant in Section 
5.2(b) as to all areas of the United States or any other country not 
designated by the parties as "Reserved Prospects" in the following manner.  
The Officer shall submit to the Corporation a list of all Prospects 
identified or generated by the Corporation's employees or consultants during 
the Officer's employment under this Agreement which the Corporation intends 
to evaluate or is actively evaluating or in which the Corporation is 
conducting or planning to conduct exploration, acquisition, or development 
activities ("Reserved Prospects"). The Corporation will either approve such 
list within 30 days of submittal or 30 days after the date of termination of 
this Agreement, whichever last occurs, or within such period notify the 
Officer of any additions to, subtractions from, or other proposed changes to 
such list.  As to those Reserved Prospects to which the parties agree, the 
Officer will not directly or indirectly, individually or as an agent, officer 
or employee of or advisor to another undertake any action for a period of two 
years from the effective date of termination of this Agreement.  As to those 
Prospects over which the parties disagree regarding their designation as 
Reserved Prospects, the parties shall resolve such dispute pursuant to 
binding arbitration under the Rules of the American Arbitration Association 
("AAA") in effect on the date of the demand for arbitration, and until such 
resolution the covenant contained in subparagraph (b) above shall continue to 
apply to all potentially affected Reserved Prospects designated by either 
party.  Any party desiring arbitration shall give written notice to the other 
party setting forth those disputed Reserved Prospects to be subject to 
arbitration.  The party receiving the demand shall have ten days to either 
(i) resolve the dispute as to the disputed Reserved Prospects or (ii) provide 
written notice of acceptance of arbitration as to those disputed Reserved 
Prospects which remain unresolved; failure to respond shall be deemed an 
election to arbitrate all matters specified in the notice.  Following 
acceptance of arbitration, each party shall have thirty days to select an 
arbitrator. Those arbitrators will then, in turn, have 14 days to select a 
third arbitrator. Notwithstanding any rule of the AAA to the contrary, any 
disinterested adult can serve as an arbitrator and need not be listed or 
provided by the AAA.  Once selected, the arbitrators will schedule and 
conduct arbitration as soon as practicable.  The costs of arbitration shall 
be allocated to the parties as determined by the arbitrators.  Section 6.4 of 
this Agreement shall apply to any arbitration hereunder to the extent not in 
conflict with the specific provisions hereof.

               (d) The Officer shall (i) review the written policies of the 
Corporation regarding the dealing in securities of the Corporation and (ii) 
comply where relevant with every rule of law or regulation of the Nasdaq 
Stock Market or other stock exchange on which the Corporation's securities 
are or may be traded, all applicable regulatory authority and every rule or 
code of conduct of the Corporation in relation to dealings in securities of 
the Corporation or any associated company.

                                       9
<PAGE>

     6. MISCELLANEOUS.

          6.1  SEVERABILITY.  Should a court or other body of competent 
jurisdiction determine that any provision of this Agreement is excessive in 
scope or otherwise invalid or unenforceable, such provision shall be adjusted 
rather than voided, if possible, so that it is enforceable to the maximum 
extent possible, and all other provisions of the Agreement shall be deemed 
valid and enforceable to the extent possible.

          6.2  WITHHOLDINGS.  All compensation and benefits to the 
Officer hereunder, including, without limitation, those payments contemplated 
by Article 4, shall be reduced by all federal, state, local and other 
withholdings and similar taxes and payments required by applicable law.

          6.3 INDEMNIFICATION.  Subject to the Officer's representation 
under Section 1.3, the Corporation hereby agrees to indemnify the Officer 
from and against any and all liability, loss, or expense (including 
reasonable attorneys' fees) that the Officer may suffer as a result of any 
claims, suits, actions, or proceedings arising out of any allegation that the 
Officer's duties and responsibilities hereunder conflict with the Officer's 
obligations to a former employer.

          6.4  ARBITRATION.  In addition to the matters to be resolved under 
Section 5.2, the parties hereby submit all controversies, claims and matters 
of difference in any way related to this Agreement or the performance or 
breach of the whole or any part hereof to arbitration by three arbitrators in 
Denver, Colorado, according to the rules and practices of the American 
Arbitration Association from time to time in force.  If such rules and 
practices shall conflict with the Colorado Rules of Civil Procedure or any 
other provisions of Colorado law then in force, such Colorado rules and 
provisions shall govern. Arbitration of any such controversy, claim or matter 
of difference shall be a condition precedent to any legal action thereon.  
This submission and agreement to arbitration shall be specifically 
enforceable.

     Within 30 days of the receipt by one party of a written notice to 
arbitrate delivered by the other party, each party shall select one 
arbitrator by written notice to the other party.  Within 30 days of the 
delivery of both notices, the two arbitrators will select a third arbitrator. 
 If the two cannot agree on such third arbitrator, the selection of a third 
arbitrator shall be made by the Chief Judge of the U.S. District Court for 
the District of Colorado or, if such judge refuses to act, such selection 
shall be made in accordance with the procedures of the American Arbitration 
Association.

     Awards shall be final and binding on all parties to the extent and in 
the manner provided by Colorado law.  Each award shall expressly entitle the 
prevailing party to recover such party's attorneys' fees and costs, and the 
award shall specifically allocate such fees and costs between the parties.  
All awards may be filed by any party with the Clerk of the District Court in 
the City and County of Denver, Colorado, and an appropriate judgment entered 
thereon and execution issued therefor.  At the election of any party, said 
award may also be filed, and judgment entered thereon and execution issued 
therefor, with the clerk of one or more other courts, state or federal, 
having jurisdiction over the party against whom such an award is rendered or 
its property.

                                       10
<PAGE>

          6.5  ENTIRE AGREEMENT; MODIFICATIONS.  This Agreement represents 
the entire agreement between the parties and may be amended, modified, 
superseded, or cancelled, and any of the terms hereof may be waived, only by 
a written instrument executed by each party hereto or, in the case of a 
waiver, by the party waiving compliance.  The failure of any party at any 
time or times to require performance of any provisions hereof shall not 
affect the right at a latter time to enforce the same.  No waiver by any 
party of the breach of any provision contained in this Agreement, whether by 
conduct or otherwise, in any one or more instances, shall be deemed to be or 
construed as a further or continuing waiver of any such breach or of any 
other term of this Agreement.

          6.6  APPLICABLE LAW.  This Agreement shall be construed under and 
governed by the laws of the State of Colorado.

          6.7  SURVIVAL.  Termination of this Agreement shall not terminate 
any right or obligation accrued prior to the date of termination, except as 
otherwise provided herein.  Article 5 shall survive the termination of this 
Agreement for the period of the Officer's employment with the Corporation.
 
          6.8  ASSIGNMENT.  Except in connection with a transfer of this 
Agreement to a successor of the Corporation by reason of a Change of Control, 
the Corporation shall not assign this Agreement other than to an affiliate of 
the Corporation without the consent of the Officer, which consent may be 
withheld in the Officer's sole discretion.  The Officer shall not assign his 
rights or obligations under this Agreement without the consent of the 
Corporation, which consent may be withheld in the Corporation's sole 
discretion.
 
     IN WITNESS WHEREOF, the parties have executed this Agreement on the day 
and year first above entered.

                                           BASIN EXPLORATION, INC.



                                           By   
                                             -------------------------------
                                             President




                                           ---------------------------------
                                           PATRICK A. JACKSON

                                       11

<PAGE>

                                 EMPLOYMENT AGREEMENT


This Agreement is made as of February 1, 1999 (the "Effective Date"), between 
BASIN EXPLORATION, INC., a Delaware corporation (the "Company"), whose 
mailing address is 370 17th Street, Suite 3400, Denver, Colorado 80202, and 
DAVID A. PUSTKA, a resident of Houston, Texas (the "Officer"), whose mailing 
address is 2504 Brentwood Drive, Houston, Texas 77019.

                                       RECITALS

A.   The Officer and the Company are parties to an Employment Agreement dated 
as of November 10, 1995 (the "Original Agreement"), whereby the Officer 
agreed to serve as the Company's Vice President of Gulf Coast Exploration and 
Division General Manager.

B.   The Officer and the Company desire to renew, extend and modify the 
Original Agreement on the terms set forth herein.

                                      AGREEMENT
     
NOW, THEREFORE, in consideration of the premises and the mutual covenants 
contained herein, the Company and the Officer agree as follows:

1.   EMPLOYMENT: The Company hereby employs the Officer to direct an 
exploration and development program in the offshore areas of the Gulf Coast 
region of the continental United States, and to perform such other duties for 
the benefit of the Company as may from time to time be directed or requested 
by the Company acting through the Company's Chief Executive Officer. 
Officer's primary responsibility will be to continue to head the Gulf Coast 
Division of the Company in its Houston, Texas office and to continue to 
implement the Business Plan executed by the Officer and the Company as of 
November 10, 1995 (the "Business Plan"), with such modifications as the 
Officer and the Company through its Chief Executive Officer have agreed to or 
will in the future agree to in order to reflect the results and evolution of 
the Company's offshore program. The Officer's title will remain Vice 
President of Gulf Coast Exploration and Division General Manager and Officer 
will continue to report directly to the Company's Chief Executive Officer.  
The Officer will not have responsibility for overseeing the Company's onshore 
Gulf of Mexico activities but will coordinate the administrative integration 
(e.g., office and sytems utilization) of the Gulf Coast Division with any 
onshore division that may be established by the Company in Houston.

2.   TERM.  The employment provided for herein shall commence on the 
Effective Date and end on February 1, 2002 (the "Term"), provided that the 
Term will be automatically extended for one year on each anniversary of the 
Effective Date beginning on February 1, 2002 unless either party gives 
written notice to the other no later than 60 days prior to the end of the 
Term (as extended) that the notifying party does not elect to extend the 
Term. Upon expiration of the Term, the Officer's employment with the Company 
will terminate unless the parties agree for the 

                                       1
<PAGE>

Officer to remain employed as an employee at will of the Company or unless 
the parties enter into an additional written agreement governing their 
relationship.

3.   EXTENT OF SERVICES.  The Officer shall devote his best efforts and full 
business time and attention to furthering the business of the Company and 
shall not during the Term hereof be engaged in other activities either 
directly or indirectly that require similar services or that require such 
substantial services on the part of the Officer that the Officer is unable to 
perform the duties assigned to him by the Company.  The foregoing shall not 
be construed as preventing the Officer from maintaining or making investments 
in any class of securities of a company or from holding working interests, 
overriding royalty interests or royalty interests in any oil and gas 
property, or from owning interests in partnerships engaged in the oil and gas 
business, provided that such investments do not require services on the part 
of the Officer that would impair the performance of his duties under this 
Agreement or would create a conflict of interest for the Officer with the 
Company.

4.   COMPENSATION.  

(a)  SALARY.  Officer shall be compensated by a salary in the amount of 
$170,000 per annum payable in substantially equal monthly installments during 
the term hereof.  The Officer's salary shall be subject to review annually 
and any variation resulting from such review shall take effect thereafter as 
if such salary amount was specifically provided for herein; provided, 
however, that the Officer's salary during the Term shall never be reduced and 
shall be raised annually beginning in 2000 no less than the percentage equal 
to the annual rate of inflation for the prior full calendar  year as measured 
by the U.S. Consumer Price Index or an alternative comparable national index 
if that index is not published..   

(b)  BENEFITS.  Officer shall be entitled to participate in any of the 
Company's benefit and deferred compensation plans as are from time to time 
generally available to the officers of the Company, including the Company's 
401(k) plan, medical and dental plans, and life and disability insurance 
plans (provided, however, that the Officer's benefits may be modified or the 
Officer may be denied participation in any such plan because of a condition 
or restriction imposed by the plan, applicable law or regulation of a 
third-party insurer or other provider in relation to participation of 
officers; and provided further that the Officer's benefits may be modified as 
reasonably necessary in order to account for differences in plans available 
in Houston).  The current employee benefit plans of the Company are described 
in Exhibit A attached hereto.

(c)  BONUS.  Officer shall be entitled to participate in the Company's bonus 
program applicable to other officers of the Company.  The parties intend and 
anticipate that the Company will have a bonus program based on the success of 
the Company in meeting its goals for each year and on the success of 
individual officers in meeting their individual goals; however, nothing in 
this paragraph shall be construed as obligating the Company to award bonuses 
in any given year to Company officers in general or to Officer provided that 
the Company does not discriminate against Officer in failing to award a bonus 
to him under circumstances in which it is awarding bonuses to other officers. 

                                       2
<PAGE>

(d)  STOCK OPTIONS.  Officer shall be granted an option under the Company's 
Equity Incentive Plan to purchase 75,000 shares of the Company's common 
stock, at a purchase price equal to the fair market value of the common stock 
on the Effective  Date, such options to be incentive stock options to the 
extent permissible under Section 422 of the Internal Revenue Code of 1986, to 
vest in three equal installments over the three year-period commencing on the 
Effective Date, to be exercisable during Officer's employment with the 
Company to a maximum term of 10 years, and to be subject to such other terms 
as are contained in the Company's standard stock option agreement, a copy of 
which has previously been executed by the Officer.  During the first three 
years of the Term, the Officer shall not be eligible to receive additional 
grants of options to purchase common stock under the Equity Incentive Plan 
but shall continue to be eligible to receive performance shares, restricted 
stock and other incentive compensation at the discretion of the Compensation 
and Incentive Committee of the Board of Directors (the "Committee"), and 
during any subsequent one-year extensions of the Term the Officer shall be 
eligible to receive additional stock option grants at the discretion of the 
Committee.  

(e)  OTHER PERQUISITES.  Officer shall be entitled to expense reimbursements, 
vacation (including no less than four weeks per year), athletic club 
membership and other benefits in accordance with the practices of the Company 
but in no event less than available to other officers of the Company..  

5.   OVERRIDING ROYALTY PLAN.  The Company has established effective November 
30, 1995 and will continue to maintain during the Term hereof a Gulf Coast 
Geoscientist Overriding Royalty Interest Plan for the benefit of the gulf 
coast exploration team (the "Override Plan").  The Override Plan will 
continue to provide, among other terms, for an award to the participants, 
including the Officer, of an overriding royalty interest on properties 
acquired by the Company for exploration as a result of the efforts of the 
Officer's Gulf Coast team.  A copy of the Override Plan is attached hereto as 
Exhibit B.

6.   PROTECTION OF COMPANY INTERESTS.

(a)  The Officer acknowledges that in the course of his employment by the 
Company he will receive, obtain or develop certain trade secrets, programs, 
geologic, geophysical, engineering and exploration data, lists of investors, 
customers and business contacts and other confidential information relating 
to the Company's business.  The Officer understands that such information is 
confidential and agrees not to reveal such information and knowledge to 
anyone outside the Company or use the information in competing with the 
Company for his own benefit for the term of such employment.  Upon 
termination of employment, the Officer shall surrender to the Company all 
papers, documents, writings, work product and other property produced by him 
or coming into his possession during the Term of such employment.  The 
Officer agrees that all such material will at all times remain the property 
of the Company.  

(b)  The Officer further understands and agrees that:

     (i)  Prior to the  Date of Termination, except in the performance of his
     duties for the Company, the Officer will not directly or indirectly,
     individually or as an agent, officer or 

                                       3
<PAGE>

     employee of another, participate in or otherwise be involved in (aa) the
     review, interpretation or evaluation of geological or geophysical data 
     pertaining to, (bb) the negotiation, acquisition, or disposition of, or 
     (cc) the supervision of the development of, in each case, Prospects 
     identified or generated by the Company's Gulf Coast exploration team 
     during the Term of this Agreement; and

     (ii) After the Date of Termination, the Officer shall be released of the
     foregoing covenant as to all areas, including but not limited to the Gulf 
     region, of the continental United States which are not designated by the
     parties as "Reserved Prospects" in the following manner.  The Officer shall
     submit to the Company a list of all Prospects identified or generated by
     the Company's Gulf Coast team during the Term of this Agreement which have
     not been either acquired or rejected for acquisition by the Company, and
     the Company will either approve such list within 30 days of submittal or 30
     days after the Date of Termination, whichever last occurs, or within such
     period notify the Officer of any additions to, subtractions from, or other
     proposed changes to such list.  As to those Reserved Prospects to which the
     parties agree, the Officer will not directly or indirectly, individually or
     as an agent, officer or employee of or advisor to another undertake any
     action for a period of one year from the Date of Termination, and the
     Officer will continue to be entitled to his share (determined as of the
     date on which notice of termination is delivered to or by the Company) of
     any overriding royalty burdening interests in such Reserved Prospects that
     become vested in the Company's Gulf Coast exploration team within one year
     from the Date of Termination.  As to those Prospects over which the parties
     disagree regarding their designation as Reserved Prospects, the parties
     shall resolve such dispute pursuant to binding arbitration under the Rules
     of the American Arbitration Association ("AAA") in effect on the date of
     the demand for arbitration, and until such resolution the covenant
     contained in subparagraph (i) above shall continue to apply to all
     potentially affected Reserved Prospects designated by either party.  Any
     party desiring arbitration shall give written notice to the other party
     setting forth those disputed Reserved Prospects to be subject to
     arbitration.  The party receiving the demand shall have ten days to either
     (i) resolve the dispute as to the disputed Reserved Prospects or (ii)
     provide written notice of acceptance of arbitration as to those disputed
     Reserved Prospects which remain unresolved; failure to respond shall be
     deemed an election to arbitrate all matters specified in the notice. 
     Following acceptance of arbitration, each party shall have thirty days to
     select an arbitrator.  Those arbitrators will then, in turn, have 14 days
     to select a third arbitrator.  Notwithstanding any rule of the AAA to the
     contrary, any disinterested adult can serve as an arbitrator and need not
     be listed or provided by the AAA.  Once selected, the arbitrators will
     schedule and conduct arbitration as soon as practicable.  The costs of
     arbitration shall be allocated to the parties as determined by the
     arbitrators.

     (iii) The Officer shall (aa) review the written policies of the Company
     regarding the dealing in securities of the Company and (bb) comply where
     relevant with every rule of law or regulation of the Nasdaq Stock Market or
     other stock exchange on which the Company's securities are or may be
     traded, all applicable regulatory authority and every rule or code of
     conduct of the Company in relation to dealings in securities of the 

                                       4
<PAGE>

     Company or any associated company.

7.   TERMINATION OF EMPLOYMENT.  

(a)  The employment provided for herein will terminate as provided in 
paragraph 2 hereof unless earlier terminated by any of the following:

     (i)  Upon the death of the Officer; or

     (ii)  Upon the disability of the Officer, which for purposes of this
     Agreement shall be the physical or mental inability of the Officer to carry
     out the normal and usual duties of his employment on a full time basis for
     the entire period of ninety (90) continuous days with the reasonable
     likelihood as determined by the Company, upon the advice of a qualified
     physician, that the Officer will be unable to carry out the normal and
     usual duties of his employment on a full time basis for the following
     continuous period of ninety (90) days, and within thirty (30) days after
     notice of termination is given by the Company to the Officer, the Officer
     shall not have returned to the performance of his duties on a full time
     basis; or 

     (iii) "For cause" (as defined in clause (b) of this Paragraph 7) upon
     written notice of such termination given by the Company to the Officer or
     by the Officer to the Company, as applicable.

(b)  As used herein, "for cause" with respect to the Officer shall mean:

     (i)  The commission of acts amounting to willful misconduct, gross
     negligence, or intentional and continual neglect of duties to the detriment
     of the Company which in the business judgment of the Board of Directors of
     the Company has adversely affected the Company; or

     (ii)  Theft or conviction of a felony or any other crime involving
     dishonesty or moral turpitude; or

     (iii)  Willful and continual failure or refusal to follow written policies
     or directives established by the Board of Directors of the Company or
     substantially perform duties in accordance with this Agreement (other than
     failure resulting from the Officer's incapacity due to physical or mental
     illness); or

     (iv)  A material breach by the Officer of this Agreement including a
     material failure to achieve the standards, objectives or performance
     required or contemplated to be achieved by the Officer in the Business Plan
     approved by the parties.

     As used herein "for cause" with respect to the Company shall mean:

     (v)  A material breach by the Company of the Override Plan, or a material
     alteration or 

                                       5
<PAGE>

     termination of the Override Plan by the Company; or

     (vi)  The Company should permit the termination of the Insurance (as
     defined in Paragraph 9 hereof), or the material modification of the
     indemnity established in Article VI, Section 1 of the Company's bylaws or
     of the Insurance which results in the reduction or restriction as to
     amounts or coverages provided for Officer's benefit by the Company; or

     (vii)  A material breach by the Company of this Agreement including a
     material failure to achieve the standards, objectives or performance
     required or contemplated to be achieved by the Company in the Business Plan
     approved by the parties; or

     (viii) The assignment to the Officer by the Company of any duties
     materially inconsistent with, or a substantial alteration in the nature or
     status of, the Officer's responsibilities or title from those described in
     this Agreement; or the reduction of the Officer's compensation, benefits or
     perquisites as in effect during the Term of this Agreement; or the
     relocation of the Company's Gulf Coast Division office away from downtown
     Houston, Texas; or the Company's relocation of the Officer to any place
     other than the offices of the Company located in Houston, Texas, it being
     understood that such relocation shall not be deemed to have occurred on the
     basis of reasonably required travel by the Officer on the Company's
     business to an extent substantially consistent with the Business Plan; or

     (ix) The occurrence of a Change of Control of the Company.  For purposes of
     this Agreement, "Change of Control" is defined as follows:

          (i)  Any "person" or "group" (within the meaning of Sections
          13(d) and 14(d)(2) of the Securities Exchange Act of 1934, as
          amended (the "1934 Act")), other than a trustee or other
          fiduciary holding securities under an employee benefit plan of
          the Company or Mr. Michael Smith is or becomes the "beneficial
          owner" (as defined in Rule 13d-3 under the 1934 Act), directly or
          indirectly, of more than thirty-three and one-third percent
          (33-1/3%) of the then outstanding voting stock of the Company; or

          (ii) Individuals who, as of the date hereof, constitute the Board
          of Directors of the Company (and any new director whose election
          by the Board or whose nomination for election by the Company's
          stockholders is approved by a vote of at least two-thirds of the
          directors then still in office who either were directors as of
          the date hereof or whose election or nomination for election is
          subsequently so approved) cease for any reason to constitute a
          majority thereof; or

          (iii) The stockholders of the Company approve a merger or
          consolidation of the Company with any other corporation, other
          than a 

                                       6
<PAGE>

          merger or consolidation which would result in the voting
          securities of the Company outstanding immediately prior thereto
          continuing to represent (either by remaining outstanding or by
          being converted into voting securities of the surviving entity)
          at least 51% of the combined voting power of the voting
          securities of the Company or such surviving entity outstanding
          immediately after such merger or consolidation; or the
          stockholders approve a plan of complete liquidation of the
          Company or an agreement for the sale or disposition by the
          Company of all or substantially all of the Company's assets;
          provided, however, that if the merger, plan of liquidation or
          sale of all or substantially all assets is not consummated
          following such stockholder approval and the transaction is
          abandoned, then the Change of Control shall be deemed not to have
          occurred; or

          (iv) Michael Smith voluntarily terminates his employment as Chief
          Executive Officer or his employment as Chief Executive Officer is
          terminated following any of the events described in subsections
          (i), (ii) or (iii) above, if the Officer elects to treat such
          occurrence as a Change of Control by written notice to the
          Company no later than 120 days from the date of termination of
          Mr. Smith's employment as Chief Executive Officer.     

(c)  Termination of employment by the Company or by the Officer (other than 
termination resulting from death) shall be communicated by written notice to 
the other party hereto.  For purposes of this Agreement, any such notice of 
termination shall indicate the specific termination provision in this 
Agreement relied upon and shall set forth in reasonable detail the facts and 
circumstances being the basis for termination.  Any such written notice shall 
be conclusively presumed to have been given if signed by the Company or the 
Officer, as applicable and deposited in the United States mail with adequate 
postage affixed, return receipt requested,  and addressed to the Officer or 
to the Company as applicable, at the respective mailing addresses shown in 
the initial recitals of this Agreement.  Actual delivery of any such written 
notice shall also constitute satisfaction of the requirement for written 
notice hereunder.

(d)  The Date of Termination shall mean (i) if the employment is terminated 
by the death of the Officer, the date of death, (ii) if the employment is 
terminated by the disability of the Officer, thirty (30) days after notice of 
termination is given, provided the Officer shall not have returned to the 
performance of his duties on a full time basis during such thirty (30) day 
period, or (iii) if the employment is terminated "for cause" pursuant to 
clause (a) (iii) or for any other reason, 30 days after the date on which the 
notice of termination is given if the basis for termination stated in the 
termination notice is not cured by the end of such 30-day period.

8.   COMPENSATION UPON TERMINATION OR DURING DISABILITY.

(a)  During any period that the Officer fails to perform his duties hereunder 
as a result of incapacity due to physical or mental illness (a "disability"), 
the Officer shall continue to receive a

                                       7
<PAGE>

salary and other benefits in effect for such period until the Officer's 
employment is terminated as in Paragraph 7(a) (ii) hereof, provided that 
payments so made to the Officer during the disability period shall be reduced 
by the amounts, if any, paid to the Officer under any disability benefits 
plans maintained by the Company.

(b)  If the Officer's employment is terminated pursuant to Paragraph 7(a) 
(ii) hereof because of his disability, the Company shall pay to the Officer 
the Officer's salary through the end of the month during which such 
termination occurs,  and shall deliver any assignments, correction of 
assignments, or other instruments reasonable or necessary in order to provide 
the Officer with record title to the interests earned by the Officer prior to 
the date of termination pursuant to the Override Plan.  If the Officer should 
die prior to the time that he has received all payments provided for pursuant 
to this Paragraph 8(b), the balance of such payments shall be made to the 
Officer's estate.

(c)  If the Officer's employment is terminated pursuant to Paragraph 7(a) (i) 
hereof because of his death, the Company shall pay to the Officer's estate 
that portion of the Officer's salary that would have accrued through the end 
of the month during which the Officer's death occurred,  and the Company 
shall deliver or cause to deliver any assignments, correction of assignments, 
or other instruments reasonable or necessary in order to provide the 
Officer's estate with record title to the interests earned by the Officer 
prior to the date of termination pursuant to the Override Plan.

(d)  If the employment is terminated pursuant to Paragraph 7 hereof and for 
any cause other than the Officer's death or disability, the Company shall pay 
or otherwise account to the Officer for all compensation and benefits 
provided for herein and in the Override Plan through the Date of Termination 
provided for in Paragraph 7 (d) hereof; provided, however, that subject to 
Paragraph 8(e), if the Company terminates the Officer's employment for any 
reason other than specifically provided in Paragraph 7(a) or if the Officer 
terminates his employment for cause as defined in Paragraph 7(b), the Company 
shall pay to the Officer the amount of salary that would otherwise have 
accrued from the Date of Termination through the balance of the Term and 
shall deliver or cause to deliver any assignments, correction of assignments 
or other instruments reasonable or necessary in order to provide the Officer 
with record title to (i) the overriding royalty interests vested in the 
Officer prior to the Date of Termination pursuant to the Override Plan and 
(ii) overriding royalty interests burdening interests acquired by the Company 
in Reserved Prospects within one year after the Date of Termination that 
would have been vested in the Officer pursuant to the Override Plan 
(determined as of the date on which notice of termination is delivered to or 
by the Company) if he had been employed with the Company at the time of such 
acquisition.

(e)  If the employment is terminated by the Officer following a Change of 
Control, then in lieu of the salary for the balance of the Term payable as 
provided in Paragraph 8(d), and subject to paragraph 8(g), then the Company 
(i) shall pay to the Officer in a lump sum in cash within five (5) days of 
the Date of Termination an amount equal to three times the sum of (x) the 
Officer's salary (calculated at the rate of his salary for the 12 months 
preceding the date of termination) plus (y) a bonus equal to the average 
annualized bonus received by the Officer prior to 

                                       8
<PAGE>

termination, and (ii) shall make all of the Officer's options, performance 
shares, and restricted stock fully vested and exercisable.

(f)  Following a termination "for cause" under paragraph 7(b) other than in 
connection with a Change of Control, the Officer may in the Officer's sole 
discretion, by delivery of a notice to the Company within thirty (30) days 
following such termination, elect to receive from the Company a lump sum 
payment by bank cashier's check equal to the present value of the flow of 
cash payments that would otherwise be paid to the Officer pursuant to 
paragraph 8(d) (not including any payments attributable to overriding 
royalties granted under the Override Plan).  Such present value shall be 
determined as of the date of delivery of the notice of election of the 
Officer and shall be based on a discount rate equal to the interest rate on 
90-day U.S. Treasury Bills, as reported in the Wall Street Journal (or 
similar publication) on the date of delivery of the election notice.  If the 
Officer elects to receive a lump sum payment pursuant to this paragraph 8(f), 
the Company shall make such payment to the Officer within sixty (60) days 
following the date on which the Officer notifies the Company of the Officer's 
election.  

(g)  Notwithstanding any other provision of this Agreement, and except as 
provided in paragraph (i). below, the payments or benefits to which the 
Officer will be entitled under paragraph 8(e) will be reduced to the extent 
necessary so that the Officer will not be liable for the federal excise tax 
levied on certain "excess parachute payments" under section 4999 of the 
Internal Revenue Code.

          (i)   The limitation of paragraph 8(g) will not apply if the
          difference between (w) the present value of all payments to which the
          Officer is entitled under paragraph 8(e) determined without regard to
          paragraph 8(g) less (x) the present value of all federal, state and
          other income and excise taxes for which the Officer is liable as a
          result of such payments exceeds the difference between (y) the present
          value of all payments to which the Officer is entitled under paragraph
          8(e) calculated as if the limitation of paragraph 8(g) applies less
          (z) the present value of all federal, state and other income and
          excise taxes for which the Officer is liable as a result of such
          reduced payments.  Present values will be determined using the
          interest rate specified in section 280G of the Internal Revenue Code
          and will be the present values as of the date on which the Officer's
          employment terminates (unless it is necessary to use a different date
          in order to avoid adverse consequences under section 280G).

          (ii)   Whether payments to the Officer are to be reduced pursuant to
          paragraph 8(g), and the extent to which they are to be so reduced,
          will be determined by the Officer.  The Officer may, at the expense of
          the Company, hire an accounting firm, law firm or employment
          consulting firm selected by the Officer to assist him in such
          determination.  If a reduction is made pursuant to paragraph 8(g), the
          Officer will have the right to determine which payments and benefits
          will be reduced.

          (iii)   The Officer shall receive the benefit of any change made by
          the Company in 

                                       9
<PAGE>

          the calculation or entitlement of severance compensation following a 
          Change of Control for any other officer of the Company, such as an 
          agreement by the Company to "gross up" the compensation paid to an 
          officer by paying the excise tax imposed by Section 280G of the 
          Internal Revenue Code .

9.   INDEMNIFICATION AND RELATED INSURANCE.  As an inducement to Officer's 
acceptance of this Agreement, the Company hereby represents, warrants and 
covenants as follows:

(a)  Article VI, Section 1 of the Company's bylaws (i) establishes an 
indemnity in favor of the Company's officers for acts undertaken in 
connection with performance of the business of the Company, (ii) has not 
previously been amended, modified, rescinded or revoked, in whole or in part 
and (iii) is applicable to the Officer, in accordance with its terms;

(b)  The Company maintains directors and officers insurance summarized in 
Exhibit  attached hereto that is applicable to Officer and will acquire and 
maintain during the Term of this Agreement general liability, employers' 
liability and other insurance required by law or otherwise customary in 
connection with the operations to be undertaken by the Company in 
implementation of the Business Plan ("Insurance").

(c)  The Company will maintain a true and correct copy of  its bylaws and 
copies of the policies or cover notes evidencing the Insurance as are in 
effect, from time to time, during the term of this Agreement at the Company's 
principal place of business.  The Officer may inspect and copy any of these 
materials during the Company's normal business hours at the Company's 
principal place of business, or otherwise as the Company and the Officer may 
reasonably agree.

(d)  During the term of this Agreement, the Company will use reasonable 
efforts to maintain the bylaws and the Insurance to provide substantially the 
same indemnity and substantially the same or greater insurance coverages and 
policy amounts as result from the bylaws as they currently exist and the 
Insurance as currently existing or obtained by the Company following the date 
hereof. Nevertheless, in the event the Company decides to alter the bylaws or 
the Insurance, or the Company is no longer able to obtain the Insurance 
coverage and policy amounts presently in effect, the Company shall provide 
written notice, as soon as reasonably practicable (and advance notice if 
possible) if the terms of the indemnity or if the insurance coverages are (i) 
reduced or restricted as to the policy amount or coverage of risks or (ii) 
otherwise modified in any material respect.

10.  GOVERNING LAW.  This agreement shall be governed, construed and enforced 
in accordance with the laws of the State of Colorado.

11.  WAIVER.  Waiver by either party of a breach of any provision of this 
Agreement shall not operate or be construed as a waiver of any subsequent 
breach thereof or of any other provision.

12.  ENTIRE AGREEMENT.  This Agreement (and the Exhibits attached hereto) 
constitute 

                                       10
<PAGE>

the entire agreement between the parties hereto with respect to the subject 
matter hereof and the same supersedes any and all prior or contemporaneous 
promises or agreements and representations not set forth herein. This 
Agreement may not be amended except by written agreement executed by both the 
Company and the Officer.

13.  SEVERABILITY.  Should any one or more provision hereof be determined to 
be illegal or unenforceable, all other provisions hereof shall be given 
effect separately therefrom and should not be affected thereby.

IN WITNESS WHEREOF, the Company and the Officer have executed and delivered 
this Agreement as of the Effective Date.

                                          BASIN EXPLORATION, INC.

                                          ----------------------------------
                                          Title:
                                                ----------------------------



                                          ----------------------------------
                                          David A. Pustka

                                       11

<PAGE>

                                                                Exhibit 21


                SUBSIDIARIES OF BASIN EXPLORATION, INC. AT 12/31/97


                               Basin Drilling, Inc.

                          Basin Offshore Oil & Gas, Inc.


<PAGE>

                                                                Exhibit 23.1


                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


           As independent public accountants, we hereby consent to the 
incorporation of our report included in this Form 10-K, into Basin 
Exploration, Inc.'s previously filed registration statements 
File Nos. 33-63528 and 333-36143.


                                       /s/ ARTHUR ANDERSEN LLP


Denver, Colorado
  March 29, 1999.



<PAGE>

                                                                Exhibit 23.2

Basin Exploration, Inc.
370 Seventeenth Street, Suite 3400
Denver, Colorado 80202


Ladies and Gentlemen:

           We hereby authorize the reference to the following report prepared 
by Ryder Scott Company in a Registration Statement on Forms S-3 and S-8 and 
in any prospectus contained therein of filed by Basin Exploration, Inc. with 
the United States Securities and Exchange Commission:

           1.   Estimated Future Reserves and Income Attributable to
                Certain Leasehold and Royalty Interests (SEC
                Parameters) as of January 1, 1999.

           We further consent to the reference to our firm under the caption 
"Experts" in such Registration Statement and prospectuses, as such 
Registration Statement may be amended.


                                       /s/ RYDER SCOTT COMPANY
                                           PETROLEUM ENGINEERS


Houston, Texas
  March 26, 1999



<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 1998
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                             331
<SECURITIES>                                         0
<RECEIVABLES>                                   10,036
<ALLOWANCES>                                         0
<INVENTORY>                                        206
<CURRENT-ASSETS>                                13,119
<PP&E>                                         306,180
<DEPRECIATION>                                 118,369
<TOTAL-ASSETS>                                 201,163
<CURRENT-LIABILITIES>                           26,343
<BONDS>                                         80,000
                                0
                                          0
<COMMON>                                           142
<OTHER-SE>                                      94,077
<TOTAL-LIABILITY-AND-EQUITY>                   201,163
<SALES>                                         48,620
<TOTAL-REVENUES>                                48,699
<CGS>                                            9,046
<TOTAL-COSTS>                                   81,701
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               2,030
<INCOME-PRETAX>                               (35,032)
<INCOME-TAX>                                   (6,532)
<INCOME-CONTINUING>                           (28,500)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (28,500)
<EPS-PRIMARY>                                   (2.06)
<EPS-DILUTED>                                   (2.06)
        

</TABLE>


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