BROWN TOM INC /DE
10-Q, 1998-05-14
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1


                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM 10-Q


[X]      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES 
         EXCHANGE ACT OF 1934

FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1998

                                       OR

[  ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES 
         EXCHANGE ACT OF 1934

COMMISSION FILE NUMBER 0-3880

                                 TOM BROWN, INC.
             ------------------------------------------------------
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

                  DELAWARE                         95-1949781
      -------------------------------           -------------------
      (STATE OR OTHER JURISDICTION OF           (I.R.S. EMPLOYER
      INCORPORATION OR ORGANIZATION)            IDENTIFICATION NO.)

                                 P. O. BOX 2608
                             500 EMPIRE PLAZA BLDG.
                                 MIDLAND, TEXAS                      79701
                    ----------------------------------------       ----------
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)       (ZIP CODE)

                                  915-682-9715
              ----------------------------------------------------
              (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE)

                                 NOT APPLICABLE
              ----------------------------------------------------
              (FORMER NAME, FORMER ADDRESS AND FORMER FISCAL YEAR,
                          IF CHANGED SINCE LAST REPORT)


Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934
during the preceding 12 months (or for such shorter period that the registrant
was required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. YES _X_   NO ___

                      APPLICABLE ONLY TO CORPORATE ISSUERS:

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of May 12, 1998.

    CLASS OF COMMON STOCK                     OUTSTANDING AT MAY 12, 1998
    ---------------------                     ---------------------------
       $.10 PAR VALUE                                  29,259,489


<PAGE>   2


                        TOM BROWN, INC. AND SUBSIDIARIES
                           QUARTERLY REPORT FORM 10-Q

                                      INDEX



                                                                  Page No.

Part I.      Financial Information:

             Consolidated Balance Sheets,
               March 31, 1998 and December 31, 1997                   4

             Consolidated Statements of Operations,
               Three Months ended March 31, 1998 and 1997             6

             Consolidated Statements of Cash Flows,
               Three Months ended March 31, 1998 and 1997             7

             Notes to Condensed Consolidated Financial Statements     9

             Management's Discussion and Analysis of
               Financial Condition and Results of
               Operations                                            13


Part II.     Other Information:

             Item 6.  Exhibits and Reports on Form 8-K               18

             Signature                                               19

                                       2
<PAGE>   3















                                 TOM BROWN, INC.
                                 P. O. Box 2608
                             500 Empire Plaza Bldg.
                              Midland, Texas 79701

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


                                QUARTERLY REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


                                    FORM 10-Q

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


                               PART I OF TWO PARTS

                              FINANCIAL INFORMATION



                                       3
<PAGE>   4

                        TOM BROWN, INC. AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
                                     ASSETS
                                 (in thousands)
<TABLE>
<CAPTION>

                                                       March 31, 1998           December 31, 1997
                                                       --------------           -----------------
                                                         (Unaudited)
<S>                                                    <C>                      <C>
CURRENT ASSETS:
     Cash and cash equivalents                            $  4,200                   $  6,537
     Accounts receivable                                    28,116                     40,949
     Inventories                                               767                        365
     Other                                                     242                        271
                                                          --------                   --------
            Total current assets                            33,325                     48,122
                                                          --------                   --------

PROPERTY AND EQUIPMENT, AT COST:
     Oil and gas properties, based on the
       successful efforts accounting method                517,057                    500,561
     Other equipment                                        71,631                     55,735
                                                          --------                   --------
                                                           588,688                    556,296
     Less:  Accumulated depreciation,
              depletion, and amortization                  170,594                    160,480
                                                          --------                   --------
            Net property and equipment                     418,094                    395,816
                                                          --------                   --------

OTHER ASSETS:
Deferred income taxes, net                                   3,808                      2,606
Other assets                                                 3,825                      4,382
                                                          --------                   --------
       Total other assets                                    7,633                      6,988
                                                          --------                   --------

                                                          $459,052                   $450,926
                                                          ========                   ========
</TABLE>
                                                                    (continued)


See accompanying notes to consolidated financial statements.

                                       4
<PAGE>   5






                        TOM BROWN, INC. AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
                      LIABILITIES AND STOCKHOLDERS' EQUITY
                                 (in thousands)
<TABLE>
<CAPTION>

                                                    March 31, 1998           December 31, 1997
                                                    --------------           -----------------
                                                     (Unaudited)
<S>                                                 <C>                      <C>
CURRENT LIABILITIES:
     Accounts payable                                  $ 21,699                   $ 32,367
     Accrued expenses                                     6,593                      7,332
     Note payable, current                                  -                        5,168
                                                       --------                   --------
            Total current liabilities                    28,292                     44,867
                                                       --------                   --------

BANK DEBT                                                50,500                     23,000
                                                       --------                   --------

OTHER NON-CURRENT LIABILITIES                             5,371                      6,661
                                                       --------                   --------

COMMITMENTS AND CONTINGENCIES

STOCKHOLDERS' EQUITY:
     Convertible preferred stock,
       $.10 par value.
       Authorized 2,500,000 shares;
       1,000,000 shares outstanding
       with a liquidation preference
       of $25,000,000.                                      100                        100
     Common stock, $.10 par value.
       Authorized 40,000,000 shares;
       Outstanding 29,254,489 and
       29,210,354 shares, respectively.                   2,925                      2,921
     Additional paid-in capital                         431,021                    430,502
     Accumulated deficit                                (59,157)                   (57,125)
                                                       --------                   --------
            Total stockholders' equity                  374,889                    376,398
                                                       --------                   --------

                                                       $459,052                   $450,926
                                                       ========                   ========
</TABLE>



See accompanying notes to consolidated financial statements.

                                       5
<PAGE>   6







                        TOM BROWN, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                    (in thousands, except per share amounts)
<TABLE>
<CAPTION>

                                                            Three Months ended
                                                                March 31,
                                                        --------------------------
                                                          1998             1997
                                                          ----             ----
                                                                (Unaudited)
<S>                                                    <C>               <C>
 REVENUES:
     Gas and oil sales                                  $ 20,174          $ 28,546
     Marketing, gathering and processing                  11,012             7,318
     Drilling                                              1,194               -
     Interest income and other                               161               486
                                                        --------          --------
         Total revenues                                   32,541            36,350
                                                        --------          --------

 COSTS AND EXPENSES:
     Gas and oil production                                4,350             4,227
     Taxes on gas and oil production                       1,846             2,090
     Cost of gas sold                                     10,359             6,196
     Cost of drilling operations                             976               -
     Exploration costs                                     2,336             1,121
     Impairments of leasehold costs                          965               180
     General and administrative                            3,705             2,397
     Depreciation, depletion and
       amortization                                        9,816             8,696
     Interest expense and other                              783             1,962
                                                        --------          --------
         Total costs and expenses                         35,136            26,869
                                                        --------          --------

 Income (loss) before income taxes                        (2,595)            9,481
 Income tax benefit (provision)                            1,001            (3,028)
                                                        --------          --------

 Net income (loss)                                        (1,594)            6,453
                                                        --------          --------

 Preferred stock dividend                                   (438)             (438)
                                                        --------          --------

 Net income (loss) attributable to
   common stock                                         $ (2,032)         $  6,015
                                                        ========          ========

 Weighted average number of 
   common shares outstanding:
   Basic                                                  29,226            23,943
                                                        ========          ========
   Diluted                                                30,676            25,104
                                                        ========          ========

 Net income (loss) per common share:
   Basic                                                $   (.07)         $    .25
                                                        ========          ========
   Diluted                                              $   (.07)         $    .24
                                                        ========          ========
</TABLE>

 See accompanying notes to consolidated financial statements.

                                       6
<PAGE>   7






                        TOM BROWN, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)
<TABLE>
<CAPTION>

                                                                     Three Months ended
                                                                           March 31,
                                                                  --------------------------
                                                                     1998             1997
                                                                     ----             ----
                                                                             (Unaudited)
<S>                                                              <C>               <C>
Cash flows from operating activities:
     Net income (loss)                                            $ (1,594)         $  6,453
     Adjustments to reconcile net income (loss)
       to net cash provided by operating
       activities:
       Depreciation, depletion and amortization                      9,816             8,696
       Gain on sale of assets                                           (2)                -
       Exploration costs                                             2,336             1,121
       Impairments of leasehold costs                                  965               180
       Provision (benefit) for deferred income taxes                (1,202)            2,865
       Changes in operating assets and
         liabilities:
         Decrease in accounts receivable                            12,332            11,658
         Increase in inventories                                      (402)              (68)
         Decrease in other current assets                               29               362
         Decrease in accounts
           payable and accrued expenses                             (9,219)           (4,411)
         Decrease in other non-current assets                        1,058                13
        (Decrease) increase in other non-current liabilities        (1,290)              816
                                                                  --------          --------


Net cash provided by operating activities                         $ 12,827          $ 27,685
                                                                  --------          --------
</TABLE>
                                                                   (continued)


See accompanying notes to consolidated financial statements.



                                       7

<PAGE>   8






                        TOM BROWN, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)

<TABLE>
<CAPTION>

                                                                     Three Months ended
                                                                           March 31,
                                                                  --------------------------
                                                                     1998             1997
                                                                     ----             ----
                                                                             (Unaudited)
<S>                                                              <C>               <C>
Cash flows from investing activities:
     Capital and exploration expenditures                         $(37,791)         $(11,879)
     Changes in accounts payable and
       accrued expenses for oil and gas
       expenditures                                                 (2,188)           (1,260)
     Proceeds from sale of assets                                    2,398             1,603
                                                                  --------          --------

Net cash used in investing activities                              (37,581)          (11,536)
                                                                  --------          --------

Cash flows from financing activities:
     Repayments of long-term debt                                      -             (14,000)
     Repayment of note payable, current                             (5,168)              -
     Borrowings of long-term debt                                   27,500               -
     Preferred stock dividends                                        (438)             (438)
     Proceeds from exercise of stock options                           523               132
                                                                  --------          --------

Net cash provided by (used in) financing activities                 22,417           (14,306)
                                                                  --------          --------

Net increase (decrease) in cash and cash
  equivalents                                                       (2,337)            1,843
                                                                  --------          --------

Cash and cash equivalents at beginning
  of period                                                          6,537            20,504
                                                                  --------          --------

Cash and cash equivalents at end of period                        $  4,200          $ 22,347
                                                                  ========          ========

Cash paid during the period for:
     Interest                                                     $    479          $    800
     Income taxes                                                      150               116
</TABLE>


See accompanying notes to consolidated financial statements.

                                       8
<PAGE>   9


                        TOM BROWN, INC. AND SUBSIDIARIES
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                   THREE MONTHS ENDED MARCH 31, 1998 AND 1997
                                   (Unaudited)


(1)     SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

        The condensed consolidated financial statements included herein have
been prepared by Tom Brown, Inc. (the "Company") and are unaudited, except for
the balance sheet at December 31, 1997 which has been prepared from the audited
financial statements at that date. The financial statements reflect necessary
adjustments, all of which were of a recurring nature, and are in the opinion of
management, necessary for a fair presentation. Certain information and footnote
disclosures normally included in financial statements prepared in accordance
with generally accepted accounting principles have been omitted pursuant to the
rules and regulations of the Securities and Exchange Commission. The Company
believes that the disclosures presented are adequate to allow the information
presented not to be misleading. Users of financial information produced for
interim periods are encouraged to refer to the footnotes contained in the Annual
Report to Stockholders when reviewing interim financial results.

(2)     ACQUISITIONS AND DIVESTITURES

        Acquisition of Sauer Drilling Company

        In January 1998, the Company completed the acquisition of W. E. Sauer
Companies L.L.C. of Casper, Wyoming for approximately $8.1 million. The assets
purchased include five drilling rigs, tubular goods, a yard and related assets.
The Company operates the assets under the name Sauer Drilling Company and will
continue to serve the drilling needs of operators in the central Rocky Mountain
region in addition to drilling for the Company.

        Acquisition of Gathering and Processing Assets by Wildhorse

        In December 1997, KNE completed the acquisition of all of the assets of
Interenergy Corporation, ("Interenergy"). The assets consist of gas gathering
and processing facilities located in Wyoming, Montana, North Dakota and South
Dakota, as well as a marketing division. KNE retained the marketing assets and
Wildhorse Energy Partners, L.L.C. ("Wildhorse") acquired the gathering and
processing assets valued at $23.4 million. Wildhorse is owned fifty-five percent
(55%) by KNE and forty-five percent (45%) by the Company. The Company's share of
this purchase was approximately $10.5 million. These assets consist of over 300
miles of pipeline and a processing plant. The Company will benefit from the
acquisition as it develops its acreage in the Big Horn Basin.


        Acquisition of the Assets of Genesis Gas and Oil, L.L.C.

        In October 1997, the Company completed the acquisition of the assets of
Genesis Gas and Oil, L.L.C. ("Genesis"). The Genesis assets are located
primarily in the Piceance Basin of western Colorado and the Green River Basin of
Wyoming and are principally operated by the Company. The properties provide
current net production of approximately 6 million cubic feet of gas and 150
barrels of oil per day. The acquisition increases the Company's acreage position
in the Piceance Basin from approximately 54,000 to 86,000 net developed and
100,000 to 148,000 net undeveloped acres. The Company's working interest has
doubled from 23% to 46% in 238 producing wells and from 34% to 68% in 500
potential development locations. The purchase price for these assets was
approximately $35.5 million.


                                       9
<PAGE>   10
                       TOM BROWN, INC. AND SUBSIDIARIES
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (continued)


        Pro Forma Information

The following table presents the unaudited pro forma revenues, net income (loss)
and net income (loss) per share of the Company for the three months ended March
31, 1998 and 1997 assuming that the Sauer acquisition, the Gathering and
Processing acquisition and the Genesis acquisition occurred on January 1, 1997.
<TABLE>
<CAPTION>

                                                       Three Months ended March 31,
                                                       ----------------------------
                                                      1998                       1997
                                                      ----                       ----
                                              (in  thousands, except for per share amounts)
<S>                                               <C>                        <C>
  Revenues                                          $ 32,541                   $ 39,216
                                                    ========                   ========

  Net income (loss)                                   (1,594)                     7,612
                                                    ========                   ========

  Net income (loss) attributable to common
     stock                                            (2,032)                     7,174
                                                    ========                   ========

  Net income (loss) per common share:
      Basic                                         $   (.07)                  $    .30
                                                    ========                   ========
      Diluted                                       $   (.07)                  $    .29
                                                    ========                   ========
</TABLE>

(3)     DEBT

        In December 1996, the Company entered into a bank credit agreement. The
credit agreement provided for a $125 million revolving credit facility (the
"Credit Facility") maturing in December 1999. Borrowings under the Credit
Facility are unsecured and bear interest, at the election of the Company, at a
rate equal to (i) the greater of the agent bank's prime rate or the federal
funds effective rate plus 0.50% or (ii) the agent bank's Eurodollar rate plus a
margin ranging from .75% to 1.00%. Interest on amounts outstanding under the
Credit Facility is due on the last day of each month in the case of loans
bearing interest at the prime rate or federal funds rate and, in the case of
loans bearing interest at the Eurodollar rate, interest payments are due on the
last day of each applicable interest period of one, two, three or six months, as
selected by the Company at the time of borrowing. At March 31, 1998, the
outstanding balance was $50.5 million at an average interest rate of 6.80%.

        Financial covenants of the Credit Facility require the Company to
maintain a minimum consolidated tangible net worth of not less than $289 million
as of March 31, 1998. The Company is also required to maintain a ratio of (i)
earnings before interest expense, state and federal taxes and depreciation,
depletion and amortization to (ii) consolidated fixed charges, as defined in the
credit agreement, of not less than 2.5:1. Additionally, the Company is required
to maintain a ratio of consolidated debt to consolidated total capitalization of
less than 0.45:1 and a current ratio of not less than 1.1:1. 

        During the quarter ended March 31, 1998, the Company was out of
compliance with one of the non-

                                       10

<PAGE>   11



                        TOM BROWN, INC. AND SUBSIDIARIES
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (continued)


financial covenants of the Credit Facility. The Company received a waiver
from the lenders regarding this event of noncompliance. The Company was in
compliance with all financial covenants at March 31, 1998.

        Standby letters of credit of approximately $3,880,000 have been issued
under two agreements. One agreement expires in April 1999 and the letter of
credit being maintained is security for performance on a long-term contract
entered into by Presidio. The second letter of credit is held as security by a
surety company for two oil and gas performance bonds issued to agencies of the
U.S. Government. The bonds will remain in place until released by the government
agencies. In connection with the acquisition of gathering and processing assets
of Interenergy, Wildhorse assumed $11.5 million in debt, $5.2 million net to the
Company. This debt was extinguished in February 1998.

(4)     INCOME TAXES

        The Company has not paid Federal income taxes due to its net operating
loss carryforward, but is required to pay alternative minimum tax ("AMT"). This
tax can be partially offset by an AMT net operating loss carryforward.

        Temporary differences and carryforwards which gave rise to significant
portions of deferred tax assets (liabilities) are as follows:
<TABLE>
<CAPTION>

                                                                  March 31,     December 31,
                                                                   1998             1997
                                                                  ---------     ------------ 
                                                                       (in thousands)
<S>                                                               <C>            <C>
Net operating loss carryforwards                                   $17,644        $17,072
Gas and oil acquisition, exploration and development
  costs deducted for tax purposes in excess of book                (16,687)       (16,819)
Investment tax credit carryforwards                                    857            857
Option plan compensation                                             1,559          1,559
Other                                                                5,990          5,492
                                                                    ------        -------
  Net deferred tax asset                                             9,363          8,161

Valuation allowance                                                 (5,555)        (5,555)
                                                                    ------        -------

  Recognized net deferred tax asset                                $ 3,808       $  2,606
                                                                    ======        =======
</TABLE>

        A valuation allowance of approximately $5.6 million at March 31, 1998
and December 31, 1997, has been provided against the Company's net deferred tax
assets based on management's estimate of the recoverability of future tax
benefits. The valuation allowance relates primarily to the ability to use net
operating loss and investment tax credit carryforwards. The Company evaluated
all appropriate factors to determine the proper valuation allowance for these
carryforwards, including any limitations concerning their use, the year the
carryforwards expire and the levels of taxable income necessary for utilization.
In this regard, full valuation allowances were provided for investment tax
credit carryforwards. Based on its expected levels of future earnings, the
Company believes it will, more likely than not, generate sufficient taxable
income to realize the benefit attributable to the net operating loss
carryforwards for which valuation allowances were not provided.

        At March 31, 1998, the Company had investment tax credit carryforwards
of approximately $.9 million and net operating loss carryforwards of
approximately $50.4 million. The Company currently has no liability for deferred
Federal income taxes because of these net operating loss and investmenttax
credit carryforwards. Realization of the benefits of these carryforwards is
dependent upon the Company's ability to generate taxable earnings in future 
periods. In addition, the availability of these carryforwards

                                       11
<PAGE>   12

                        TOM BROWN, INC. AND SUBSIDIARIES
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (continued)

is subject to various limitations. The remainder of the carryforwards will
expire between 1998 and 2004. Additionally, the Company has approximately $1.7
million of statutory depletion carryforwards and $4.2 million of AMT credit
carryforwards that may be carried forward until utilized.




                                       12
<PAGE>   13

                        TOM BROWN, INC. AND SUBSIDIARIES

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS


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

 RESULTS OF OPERATIONS

        Revenues

      During the three-month period ended March 31, 1998, revenues from natural
 gas and oil production decreased $8.4 million to $20.2 million compared to the
 same period in 1997. Such decrease in gas and oil revenues was the result of a
 decrease in (i) average natural gas sales prices received by the Company from
 $2.86 per Mcf to $2.03 per Mcf which decreased revenues by approximately $6.4
 million, (ii) oil sales volumes of 18% which decreased revenues by
 approximately $.8 million and (iii) average crude oil sales prices from $20.29
 to $12.91 per barrel which decreased revenues $2.4 million. An increase in gas
 and oil sales was the result of an increase in natural gas sales volumes of 8%
 which increased revenues by approximately $1.2 million.

      Marketing, gathering and processing revenues increased $3.7 million for
 the three-month period ended March 31, 1998 as a result of increased activity
 in the Company's natural gas marketing operations through Wildhorse, a joint
 venture with KN Energy, Inc., and due to gathering revenues from a December
 1997 purchase of gas gathering and processing facilities, also through
 Wildhorse.

      Drilling revenue is the result of the purchase of Sauer Drilling Company
 in January, 1998. Drilling revenues compared to cost of drilling netted a gross
 margin for the first quarter of approximately $218 thousand.

      Selected Operating Data
                                                       Three Months ended
                                                             March 31,
                                                  ----------------------------
                                                    1998                 1997
                                                    ----                 ----
 Revenues (in thousands):
     Natural gas sales                            $ 16,817            $ 22,074
     Crude oil sales                                 3,357               6,472
     Marketing, gathering and processing            11,012               7,318
     Drilling                                        1,194                  -
     Other                                             161                 486
                                                  --------            --------

           Total revenues                         $ 32,541            $ 36,350
                                                  ========            ========

 Net income (loss) attributable to common
     stock, (in thousands)                        $ (2,032)           $  6,015
                                                  ========            ========

 Natural gas production (MMcf)                       8,303               7,709
 Crude oil production (MBbls)                          260                 319
 Average natural gas sales price ($/Mcf)          $   2.03            $   2.86
 Average crude oil sales price ($/Bbl)            $  12.91            $  20.29



                                       13
<PAGE>   14
     Costs and Expenses

     Costs and expenses for the three months ended March 31, 1998 increased
approximately 31% to $35.1 million as compared to the same period in 1997.
Natural gas and oil production expense increased $.1 million as a result of
increased production. Taxes on gas and oil production decreased $.2 million due
to lower prices received during the first quarter of 1998 as compared to the
same period in 1997. Cost of gas sold increased $4.2 million as a result of the
addition of the December 1997 purchase of gas gathering and processing
facilities and the increased cost of transportation due to the narrowing margin
received between pipelines. Exploration costs increased $1.2 million due to
exploratory dry hole costs in the first quarter of 1998. Impairments of
leasehold costs increased by $.8 million as a result of additional accruals for
future impairment. General and administrative expenses increased $1.3 million
due to increases in salaries, professional fees and insurance. Depreciation,
depletion and amortization increased $1.1 million due to the additional oil and
gas volumes produced in the first quarter, as well as the addition of
depreciation expense from Sauer Drilling in the first quarter.

     A valuation allowance of approximately $5.6 million at March 31, 1998 has
been provided against the Company's net deferred tax assets based on
management's estimate of the recoverability of future tax benefits. The
valuation allowance relates primarily to the ability to use net operating loss
and investment tax credit carryforwards. The Company evaluated all appropriate
factors to determine the proper valuation allowance for these carryforwards,
including any limitations concerning their use, the year the carryforwards
expire and the levels of taxable income necessary for utilization. In this
regard, full valuation allowances were provided for investment tax credit
carryforwards. Based on its expected levels of future earnings, the Company
believes it will, more likely than not, generate sufficient taxable income to
realize the benefit attributable to the net operating loss carryforwards for
which valuation allowances were not provided.

CAPITAL RESOURCES AND LIQUIDITY

     Growth and Acquisitions

     Most of the growth of the Company has resulted from recent acquisitions
and, to a lesser extent, from the Company's successful development drilling. The
Company continues to pursue opportunities which will add value by increasing its
reserve base and presence in significant natural gas areas, and further
developing the Company's ability to control and market the production of natural
gas. As the Company continues to evaluate potential acquisitions and property
development opportunities, it will benefit from its financing flexibility and
the leverage potential of the Company's overall capital structure.

     Capital Expenditures

     The Company's capital and exploration expenditures for the three-month
period ended March 31, 1998 were approximately $37.8 million as compared to
$11.9 million in the same period in 1997.

     The Company has historically funded capital expenditures and working
capital requirements with internally generated cash and borrowings. During the
three months ended March 31, 1998, net cash provided by operating activities was
$12.8 million as compared to $27.7 million for the same period of 1997.

        Bank Credit Facility

        The Company's Credit Facility provides for a $125 million revolving line
of credit with a current borrowing base of $125 million. The amount of the
borrowing base is determined by reference to the collateral value of the
Company's net proved reserves. At March 31, 1998, the aggregate outstanding
balance under the Credit Facility was $50.5 million, bearing interest at
approximately 6.8% per annum, 


                                       14
<PAGE>   15
and the Company was in compliance with the covenants contained in the Credit
Facility. Borrowings under the Credit Facility are unsecured and bear interest,
at the election of the Company, at (i) the greater of the agent bank's prime
rate or the federal funds effective rate, plus 0.50% or (ii) the agent bank's
Eurodollar rate, plus a margin ranging from 0.75% to 1.00%. The Credit Facility
contains certain financial covenants which require the Company to maintain a
minimum consolidated tangible net worth as well as certain financial ratios. See
Note 3 to Notes to Consolidated Financial Statements of the Company included
elsewhere herein.

        Markets and Prices

        Wildhorse, which was created to provide gathering, processing,
marketing, storage and field services to Rocky Mountain gas and oil producers,
will continue to pursue the construction or acquisition of gathering, processing
and storage areas of the Rocky Mountain region. During the three months ended
March 31,1998, Wildhorse invested approximately $6.8 million for gas gathering
and processing assets. The Company (45 percent) and KNE (55 percent) jointly own
Wildhorse. Wildhorse is operated by KNE under the direction of an operating team
with equal representation from KNE and the Company.

        The Company has dedicated significant amounts of its Rocky Mountain gas
production to Wildhorse for gathering, processing and marketing. KNE contributed
gas marketing contracts and storage assets in western Colorado.

        The Company's revenues and associated cash flows are significantly
impacted by changes in gas and oil prices. All of the Company's gas and oil
production is currently market sensitive as no amounts of the Company's future
gas and oil production have been sold at contractually specified prices. During
the first quarter of 1998, the average prices received for gas and oil by the
Company were $2.03 per Mcf and $12.91 per barrel, respectively, as compared to
$2.86 Mcf and $20.29 per barrel for the same period in 1997.

        Year 2000

        The Company utilizes software and technologies throughout its operations
that will be affected by the date change in the year 2000 (Year 2000 Issue). An
assessment of the systems that will be affected by the Year 2000 Issue is
underway. The Company does not believe the costs related to the Year 2000 Issue
will materially impact its results of operations. However, there can be no
guarantee that the systems of other companies, on which the Company's systems
rely, will be timely converted or that a failure to convert by another company
or a conversion that is incompatible with the Company's systems would not have a
material adverse effect on the Company.

        Forward-Looking Statements and Risk

        Certain statements in this report, including statements of the future
plans, objectives, and expected performance of the Company, are forward-looking
statements that are dependent on certain events, risks and uncertainties that
may be outside the Company's control which could cause actual results to differ
materially from those anticipated. Some of these include, but are not limited
to, economic and competitive conditions, inflation rates, legislative and
regulatory changes, financial market conditions, political and economic
uncertainties, future business decisions, and other uncertainties, all of which
are difficult to predict.

        There are numerous uncertainties inherent in estimating quantities of
proven oil and gas reserves and in projecting future rates of production and
timing of development expenditures. The total amount or timing of actual future
production may vary significantly from reserves and production estimates. The
drilling of exploratory wells can involve significant risks including those
related to timing, success rates and cost overruns. Lease and rig availability,
complex geology and other factors can affect these risks. Future oil and gas
prices also could affect results of operations and cash flows.


                                       15
<PAGE>   16
        Recent Accounting Pronouncements

        In the first quarter of 1998, the Company adopted SFAS No. 130
"Reporting Comprehensive Income", which requires the display of comprehensive
income and its components in the financial statements. Comprehensive income
represents all changes in equity of an entity during the reporting period,
including net income and charges directly to equity which are excluded from net
income. For the quarters ended March 31, 1998 and 1997, there is no difference
between the Company's "traditional" and "comprehensive" net income.

        In June 1997, the FASB also issued SFAS No. 131, "Disclosures about
Segments of an Enterprise and Related Information" which establishes standards
for the way public enterprises are to report information about operating
segments in annual financial statements and requires the reporting of selected
information about operating segments in interim financial reports issued to
shareholders. SFAS No. 131 also establishes standards for related disclosures
about products and services, geographic areas, and major customers. SFAS No. 131
is effective for the Company for its fiscal year ending December 31, 1998, at
which time the Company will adopt the provision. This statement is not
anticipated to have a material impact on the Company's financial disclosures.

        In March 1998, the American Institute of Certified Public Accountants
(AICPA) issued Statement of Position (SOP) 98-1, "Accounting for the Costs of
Computer Software Developed or Obtained for Internal Use". The SOP provides
guidance with respect to accounting for the various types of costs incurred for
computer software developed or obtained for the Company's use. The Company is
required to and will adopt SOP 91-1 by the first quarter of fiscal 1999 and
believes that adoption will not have a significant effect on its consolidated
financial statements.

        In April 1998, the AICPA issued SOP 98-5, "Reporting on the Costs of
Start-Up Activities", which requires costs of start-up activities to be expensed
as incurred. The statement is effective for financial statement beginning after
December 15, 1998. The Company expects to expense currently capitalized costs
related to start-up activities as a cumulative effect of a change in accounting
principle when the statement is adopted in January 1999. The adoption of this
standard is not expected to have a significant effect on the Company's financial
position or results of operations.


                                       16
<PAGE>   17




                                 TOM BROWN, INC.
                                 P. O. Box 2608
                             500 Empire Plaza Bldg.
                              Midland, Texas 79701



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



                                QUARTERLY REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


                                    FORM 10-Q



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



                              PART II OF TWO PARTS


                                OTHER INFORMATION



<PAGE>   18


                        TOM BROWN, INC. AND SUBSIDIARIES

                                OTHER INFORMATION


 Item 6.   Exhibits and Reports on Form 8-K and Form 8-K/A

     (a)       Exhibits                     Description
               --------                     -----------
               Exhibit No. 10.1*            Credit Agreement, dated as of April
                                            17, 1998, among the Registrant, The
                                            Chase Manhattan Bank and the other 
                                            lenders parties thereto.

               Exhibit No. 27               Financial Data Schedule

- ----------------------
*  Filed herewith

     (b)        Reports on Form 8-K

               None



                                       18
<PAGE>   19


                        TOM BROWN, INC. AND SUBSIDIARIES

                                OTHER INFORMATION

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.




                                                      TOM BROWN, INC.
                                               -----------------------------
                                                        (Registrant)




May 12, 1998                                   /s/ Kim Harris
- ------------                                   --------------------------------
    Date                                           Kim Harris
                                                   Controller

                                              (Mr. Harris is the Chief Financial
                                              Officer and is duly authorized to
                                              sign on behalf of the Registrant)


                                       19
<PAGE>   20

                               INDEX TO EXHIBITS


       Exhibits                     Description
       --------                     -----------
       Exhibit No. 10.1*            Credit Agreement, dated as of April
                                    17, 1998, among the Registrant, The
                                    Chase Manhattan Bank and the other 
                                    lenders parties thereto.

       Exhibit No. 27               Financial Data Schedule

- ----------------------
*  Filed herewith

<PAGE>   1
                                                                  EXECUTION COPY





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



                                CREDIT AGREEMENT


                                     among


                                TOM BROWN, INC.


                              The Several Lenders
                        from Time to Time Parties Hereto


                                      and


                           THE CHASE MANHATTAN BANK,
                            as Administrative Agent



                           Dated as of April 17, 1998


================================================================================
<PAGE>   2
                              TABLE OF CONTENTS
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SECTION 1.  DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1

         1.1  Defined Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
         1.2  Other Definitional Provisions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12

SECTION 2.  AMOUNT AND TERMS OF COMMITMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12

         2.1  Commitments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
         2.2  Procedure for Revolving Credit Borrowing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
         2.3  Fees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
         2.4  Termination or Reduction of Commitments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
         2.5  Repayment of Revolving Credits; Evidence of Debt  . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
         2.6  Borrowing Base  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
         (a)  Initial Borrowing Base  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
         (b)  Determinations of the Borrowing Base  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
         2.7  Optional and Mandatory Prepayments  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
         2.8  Conversion and Continuation Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  16
         2.9  Minimum Amounts and Maximum Number of Tranches  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
         2.10  Interest Rates and Payment Dates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
         2.11  Computation of Interest and Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
         2.12  Inability to Determine Interest Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
         2.13  Pro Rata Treatment and Payments  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
         2.14  Illegality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
         2.15  Requirements of Law  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
         2.16  Taxes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
         2.17  Indemnity  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         2.18  Change of Lending Office . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22

SECTION 3.  REPRESENTATIONS AND WARRANTIES  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22

         3.1  Financial Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         3.2  No Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         3.3  Corporate Existence; Compliance with Law  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         3.4  Corporate Power; Authorization; Enforceable Obligations . . . . . . . . . . . . . . . . . . . . . . . .  23
         3.5  No Legal Bar  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         3.6  No Material Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         3.7  No Default  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         3.8  Ownership of Property; Liens  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         3.9  Intellectual Property . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         3.10  No Burdensome Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         3.11  Taxes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         3.12  Federal Regulations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         3.13  ERISA  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         3.14  Investment Company Act; Public Utility Holding Company Act; Other 
                 Regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
</TABLE>


                                      2
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         3.15  Purpose of Revolving Credit Loans   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         3.16  Environmental Matters   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         3.17  Insurance   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
         3.18  Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26

SECTION 4.  CONDITIONS PRECEDENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27

         4.1  Conditions to Effectiveness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
         (a)  Loan Documents  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
         (b)  Effective Certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
         (c)  Corporate Proceedings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
         (d)  Incumbency Certificate  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
         (e)  Corporate Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
         (f)  Fees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
         (g)  Legal Opinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
         (h)  Reserve Report  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
         (i)  Existing Agreement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
         4.2  Conditions to Each Revolving Credit Loan  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
         (a)  Representations and Warranties  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
         (b)  No Default  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
         (c)  Maintenance of Borrowing Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
         (d)  No Material Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
         (e)  Borrowing Base Certificate  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
         (f)  Additional Matters  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

SECTION 5.  AFFIRMATIVE COVENANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

         5.1  Financial Statements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
         5.2  Certificates; Other Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
         5.3  Payment of Obligations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
         5.4  Conduct of Business and Maintenance of Existence  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
         5.5  Maintenance of Property; Insurance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
         5.6  Inspection of Property; Books and Records; Discussions  . . . . . . . . . . . . . . . . . . . . . . . . . 31
         5.7  Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
         5.8  Environmental Laws  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
         5.9  Borrowing Base Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

SECTION 6.  NEGATIVE COVENANTS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

         6.1  Financial Condition Covenants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
         (a)  Maintenance of Consolidated Tangible Net Worth  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
         (b)  Fixed Charge Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
         (c)  Leverage  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
         6.2  Limitation on Indebtedness  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
         6.3  Limitation on Liens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
         6.4  Limitation on Guarantee Obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
         6.5  Limitation on Fundamental Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
</TABLE>





                                      3
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         6.6  Limitation on Sale of Assets  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
         6.7  Limitation on Dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
         6.8  Limitation on Investments, Acquisitions, Loans and Advances . . . . . . . . . . . . . . . . . . . . . . . 35
         6.9  Limitation on Transactions with Affiliates  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
         6.10  Limitation on Sales and Leasebacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
         6.11  Limitation on Operating Leases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
         6.12  Limitation on Changes in Fiscal Year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
         6.13  Limitation on Negative Pledge Clauses  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
         6.14  Limitation on Lines of Business  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
         6.15  Limitation on Certain Agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

SECTION 7.  EVENTS OF DEFAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
                                                                                                                         

SECTION 8.  THE AGENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

         8.1  Appointment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
         8.2  Delegation of Duties  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
         8.3  Exculpatory Provisions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
         8.4  Reliance by Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
         8.5  Notice of Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
         8.6  Non-Reliance on Agent and Other Lenders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
         8.7  Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
         8.8  Agent in Its Individual Capacity  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
         8.9  Successor Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
         8.10  Co-Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

SECTION 9.  MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

         9.1  Amendments and Waivers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
         9.2  Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
         9.3  No Waiver; Cumulative Remedies  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
         9.4  Survival of Representations and Warranties  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
         9.5  Payment of Expenses and Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
         9.6  Successors and Assigns; Participations and Assignments  . . . . . . . . . . . . . . . . . . . . . . . . . 44
         9.7  Adjustments; Set-off  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
         9.8  Counterparts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
         9.9  Severability  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
         9.10  Integration  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
         9.11  GOVERNING LAW  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
         9.12  Submission To Jurisdiction; Waivers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
         9.13  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
         9.14  WAIVERS OF JURY TRIAL  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
         9.15  Limitation of Interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
         9.16  Existing Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
</TABLE>





                                      4
<PAGE>   5



<TABLE>
<S>              <C>
Schedule I       Commitments and Addresses for Notices
Schedule 3.18    Subsidiaries

EXHIBITS

Exhibit A        Form of Revolving Credit Note
Exhibit B        Form of Subsidiaries Guarantee
Exhibit C        Form of Effective Certificate
Exhibit D        Form of Opinion of Lynch, Chappell & Alsup
Exhibit E        Form of Borrowing Base Certificate
Exhibit F        Form of Assignment and Acceptance
</TABLE>





                                      5

<PAGE>   6


          CREDIT AGREEMENT, dated as of April 17, 1998 (this "Agreement"),
among Tom Brown, Inc., a Delaware corporation (the "Borrower"), the several
banks and other financial institutions from time to time parties to this
Agreement (individually, a "Lender", and collectively, the "Lenders") and The
Chase Manhattan Bank, a New York banking corporation ("Chase"), as
administrative agent for the Lenders hereunder (in such capacity, the "Agent").

          The parties hereto hereby agree as follows:

                           SECTION 1.  DEFINITIONS

          1.1  Defined Terms.  As used in this Agreement, the following
terms shall have the following meanings:

                 "ABR":  for any day, a rate per annum (rounded upwards, if
         necessary, to the next 1/16 of 1%) equal to the greater of (a) the
         Prime Rate in effect on such day and (b) the Federal Funds Effective
         Rate in effect on such day plus 1/2 of 1%.  For purposes hereof:
         "Prime Rate" shall mean the rate of interest per annum publicly
         announced from time to time by the Agent as its prime rate in effect
         at its principal office in New York City (the Prime Rate not being
         intended to be the lowest rate of interest charged by Chase in
         connection with extensions of credit to debtors); "Federal Funds
         Effective Rate" shall mean, for any day, the weighted average of the
         rates on overnight federal funds transactions with members of the
         Federal Reserve System arranged by federal funds brokers, as published
         on the next succeeding Business Day by the Federal Reserve Bank of New
         York, or, if such rate is not so published for any day which is a
         Business Day, the average of the quotations for the day of such
         transactions received by the Agent from three federal funds brokers of
         recognized standing selected by it.  Any change in the ABR due to a
         change in the Prime Rate or the Federal Funds Effective Rate shall be
         effective as of the opening of business on the effective day of such
         change in the Prime Rate or the Federal Funds Effective Rate,
         respectively.

                 "ABR Loans":  Revolving Credit Loans the rate of interest
         applicable to which is based upon the ABR.

                 "Affiliate":  as to any Person, any other Person (other than a
         Subsidiary) which, directly or indirectly, is in control of, is
         controlled by, or is under common control with, such Person.  For
         purposes of this definition, "control" of a Person means the power,
         directly or indirectly, either to (a) vote 10% or more of the
         securities having ordinary voting power for the election of directors
         of such Person or (b) direct or cause the direction of the management
         and policies of such Person, whether by contract or otherwise.

                 "Agent":  The Chase Manhattan Bank, as the administrative
         agent for the Lenders under this Agreement and the other Loan
         Documents.

                 "Agreement":  this Credit Agreement, as amended, supplemented
         or otherwise modified from time to time.

                 "Applicable Margin":  on each day when the Utilization
         Percentage is less than 50%, 0.625% per annum, on each day when the
         Utilization Percentage is equal to or
<PAGE>   7
                                                                               2


         greater than 50% but less than or equal to 75%, 0.75% per annum, and
         on each day when the Utilization Percentage is greater than 75%, 1.00%
         per annum.

                 "Assignee":  as defined in subsection 9.6(c).

                 "Available Commitment":  at any time any amount equal to the
         lesser of (i) the aggregate Commitments of the Lenders and (ii) the
         Borrowing Base at that time.

                 "Board":  the Board of Governors of the Federal Reserve
         System.

                 "Borrowing Base":  at any date, the amount determined pursuant
         to subsection 2.6(a) as the amount of credit available to the Borrower
         under this Agreement at such date.

                 "Borrowing Base Assets":  the proven reserves of the Borrower
         and each Subsidiary Guarantor described in the most recent Reserve
         Report submitted by the Borrower to the Agent in accordance with
         subsection 2.6(b).

                 "Borrowing Date":  any Business Day specified in a notice
         pursuant to subsection 2.2 as a date on which the Borrower requests
         the Lenders to make Revolving Credit Loans hereunder.

                 "Business":  as defined in subsection 3.16(b).

                 "Business Day":  a day other than a Saturday, Sunday or any
         other day on which commercial banks in New York City are authorized or
         required by law to close.

                 "Capital Stock":  any and all shares, interests,
         participations or other equivalents (however designated) of capital
         stock of a corporation, any and all equivalent ownership interests in
         a Person (other than a corporation) and any and all warrants or
         options to purchase any of the foregoing.

                 "Cash Equivalents":  (a) securities with maturities of one
         year or less from the date of acquisition issued or fully guaranteed
         or insured by the United States Government or any agency thereof, (b)
         certificates of deposit and eurodollar time deposits with maturities
         of one year or less from the date of acquisition and overnight bank
         deposits of any Lender or of any commercial bank having capital and
         surplus in excess of $500,000,000, (c) repurchase obligations of any
         Lender or of any commercial bank satisfying the requirements of clause
         (b) of this definition, having a term of not more than 30 days with
         respect to securities issued or fully guaranteed or insured by the
         United States Government, (d) commercial paper of a domestic issuer
         rated at least A-2 by Standard and Poor's Rating Group ("S&P") or P-2
         by Moody's Investors Service, Inc. ("Moody's"), (e) securities with
         maturities of one year or less from the date of acquisition issued or
         fully guaranteed by any state, commonwealth or territory of the United
         States, by any political subdivision or taxing authority of any such
         state, commonwealth or territory or by any foreign government, the
         securities of which state, commonwealth, territory, political
         subdivision, taxing authority or foreign government (as the case may
         be) are rated at least A by S&P or A by Moody's, (f) securities with
         effective maturities of one year or less from the date of acquisition
         backed by an Aaa/AAA insurer or standby
<PAGE>   8
                                                                               3


         letters of credit issued by any Lender or any commercial bank
         satisfying the requirements of clause (b) of this definition, (g)
         securities with maturities of six months or less from the date of
         acquisition overcollateralized with United States' Government
         obligations as collateral or (h) shares of money market mutual or
         similar funds which invest exclusively in assets satisfying the
         requirements of clauses (a) through (g) of this definition.

                 "Chase":  The Chase Manhattan Bank.

                 "Co-Agent":  NationsBank of Texas, N.A., as co-agent for the
         Lenders under this Agreement and the other Loan Documents.

                 "Code":  the Internal Revenue Code of 1986, as amended from
         time to time.

                 "Commitment":  as to any Lender, the obligation of such Lender
         to make Revolving Credit Loans to the Borrower hereunder in an
         aggregate principal amount at any one time outstanding not to exceed
         the amount set forth opposite such Lender's name on Schedule I, as
         such amount may be reduced from time to time in accordance with the
         provisions of this Agreement.

                 "Commitment Fee Rate":  on each day when the Utilization
         Percentage is less than 50%, a rate per annum equal to .20% and on
         each day when the Utilization Percentage is equal to or greater than
         50%, a rate per annum equal to .25%.

                 "Commitment Percentage":  as to any Lender at any time, the
         percentage which such Lender's Commitment then constitutes of the
         aggregate Commitments (or, at any time after the Commitments shall
         have expired or terminated, the percentage which the aggregate
         principal amount of such Lender's Revolving Credit Loans then
         outstanding constitutes of the aggregate principal amount of the
         Revolving Credit Loans then outstanding).

                 "Commitment Period":  the period from and including the
         Effective Date to but not including the Termination Date or such
         earlier date on which the Commitments shall terminate as provided
         herein.

                 "Commonly Controlled Entity":  an entity, whether or not
         incorporated, which is under common control with the Borrower within
         the meaning of Section 4001 of ERISA or is part of a group which
         includes the Borrower and which is treated as a single employer under
         Section 414 of the Code.

                 "Consolidated Debt": as of the date of determination, of any
         Person at such date, (a) all indebtedness of such Person for borrowed
         money or for the deferred purchase price of property or services
         (other than current trade liabilities incurred in the ordinary course
         of business and payable in accordance with customary practices), (b)
         any other indebtedness of such Person which is evidenced by a note,
         bond, debenture or similar instrument, (c) all obligations of such
         Person under Financing Leases, (d) all obligations of such Person in
         respect of acceptances issued or created for the account of such
         Person and (e) all Guarantee Obligations of such Person in respect of
         obligations described in (a), (b), (c) and (d).
<PAGE>   9
                                                                               4



                 "Consolidated EBITDA":  for any period, the revenues of the
         Borrower and its Subsidiaries for such period from continuing
         operations, minus associated costs (generally excluding Consolidated
         Interest Expense, income taxes, unallocated depreciation, depletion,
         and amortization and other non-cash expenses), determined in each case
         on a consolidated basis in accordance with GAAP.

                 "Consolidated Fixed Charges":  for any period, the sum
         (without duplication) of (i) Consolidated Interest Expense for such
         period, (ii) provision for cash income taxes made by the Borrower or
         any of its Subsidiaries on a consolidated basis in respect of such
         period and (iii) scheduled payments made during such period on account
         of principal of Indebtedness of the Borrower or any of its
         Subsidiaries.

                 "Consolidated Interest Expense:"  for any period, the amount
         of interest expense, both expensed and capitalized, of the Borrower
         and its Subsidiaries determined on a consolidated basis in accordance
         with GAAP, for such period on the aggregate principal amount of their
         Indebtedness, determined on a consolidated basis in accordance with
         GAAP.

                 "Consolidated Net Income":  for any period, the consolidated
         net income (or loss) of the Borrower and its Subsidiaries determined
         on a consolidated basis in accordance with GAAP.

                 "Consolidated Net Worth":  as of the date of determination,
         all items which in conformity with GAAP would be included under
         shareholders' equity on a consolidated balance sheet of the Borrower
         and its Subsidiaries at such date.

                 "Consolidated Tangible Net Worth":  as of the date of
         determination, Consolidated Net Worth after deducting therefrom the
         following:

                          (a)     any surplus resulting from the write-up of
                 assets subsequent to December 31, 1997;

                          (b)     goodwill, including any amounts (however
                 designated on the balance sheet) representing the cost of
                 acquisitions of Subsidiaries in excess of underlying tangible
                 assets;

                          (c)     patents, trademarks, copyrights;

                          (d)     leasehold improvements not recoverable at the
                 expiration of a lease; and

                          (e)     deferred charges (including, but not limited
                 to, unamortized debt discount and expense, organization
                 expenses and experimental and development expenses, but
                 excluding prepaid expenses and expensed general and
                 administrative and geological and geophysical expenses).

                 "Consolidated Total Capitalization":  as of the date of
         determination, the sum of Consolidated Tangible Net Worth and
         Consolidated Debt.
<PAGE>   10
                                                                               5



                 "Contractual Obligation":  as to any Person, any provision of
         any security issued by such Person or of any agreement, instrument or
         other undertaking to which such Person is a party or by which it or
         any of its property is bound.

                 "Convertible Preferred Stock":  the $1.75 Convertible
         Preferred Stock, Series A, of the Borrower.

                 "Default":  any of the events specified in Section 7, whether
         or not any requirement for the giving of notice, the lapse of time, or
         both, or any other condition, has been satisfied.

                 "Dollars" and "$":  dollars in lawful currency of the United
         States of America.

                 "Effective Date":  the date on which the conditions precedent
         set forth in subsection 4.1 shall be satisfied.

                 "Environmental Laws":  any and all foreign, Federal, state,
         local or municipal laws, rules, orders, regulations, statutes,
         ordinances, codes, decrees, requirements of any Governmental Authority
         or other Requirements of Law (including common law) regulating,
         relating to or imposing liability or standards of conduct concerning
         protection of human health or the environment, as now or may at any
         time hereafter be in effect.

                 "ERISA":  the Employee Retirement Income Security Act of 1974,
         as amended from time to time.

                 "Eurocurrency Reserve Requirements":  for any day as applied
         to a Eurodollar Loan, the aggregate (without duplication) of the rates
         (expressed as a decimal fraction) of reserve requirements in effect on
         such day (including, without limitation, basic, supplemental, marginal
         and emergency reserves under any regulations of the Board of Governors
         of the Federal Reserve System or other Governmental Authority having
         jurisdiction with respect thereto) dealing with reserve requirements
         prescribed for eurocurrency funding (currently referred to as
         "Eurocurrency Liabilities" in Regulation D of such Board) maintained
         by a member bank of such System.

                 "Eurodollar Base Rate":  with respect to each day during each
         Interest Period pertaining to a Eurodollar Loan, the rate per annum
         equal to the rate at which Chase is offered Dollar deposits at or
         about 10:00 A.M., New York City time, two Business Days prior to the
         beginning of such Interest Period in the interbank eurodollar market
         where the eurodollar and foreign currency and exchange operations in
         respect of its Eurodollar Loans are then being conducted for delivery
         on the first day of such Interest Period for the number of days
         comprised therein and in an amount comparable to the amount of its
         Eurodollar Loan to be outstanding during such Interest Period.

                 "Eurodollar Loans":  Revolving Credit Loans the rate of
         interest applicable to which is based upon the Eurodollar Rate.

                 "Eurodollar Rate":  with respect to each day during each
         Interest Period pertaining to a Eurodollar Loan, a rate per annum
         determined for such day in accordance with the following formula
         (rounded upward to the nearest 1/100th of 1%):

                             Eurodollar Base Rate        
                 ----------------------------------------
                 1.00 - Eurocurrency Reserve Requirements
<PAGE>   11
                                                                               6




                 "Eurodollar Tranche":  with reference to Eurodollar Loans, the
         then current Interest Periods with respect to all of which begin on
         the same date and end on the same later date (whether or not such
         Loans shall originally have been made on the same day).

                 "Event of Default":  any of the events specified in Section 7;
         provided that any requirement for the giving of notice, the lapse of
         time, or both, or any other condition, has been satisfied.

                 "Existing Agreement":  the Credit Agreement, dated as of
         December 23, 1996, as amended, supplemented or otherwise modified
         through the Effective Date, among the Borrower, the several banks and
         financial institutions parties thereto and The Chase Manhattan Bank,
         as Agent.

                 "Fee Letter":  the fee letter, dated April 10, 1998, between
         Chase, Chase Securities Inc. and the Borrower.

                 "Financing Lease":  any lease of property, real or personal,
         the obligations of the lessee in respect of which are required in
         accordance with GAAP to be capitalized on a balance sheet of the
         lessee.

                 "GAAP":  generally accepted accounting principles in the
         United States of America in effect from time to time.

                 "Governmental Authority":  any nation or government, any state
         or other political subdivision thereof and any entity exercising
         executive, legislative, judicial, regulatory or administrative
         functions of or pertaining to government.

                 "Guarantee Obligation":  as to any Person (the "guaranteeing
         person"), any obligation of (a) the guaranteeing person or (b) another
         Person (including, without limitation, any bank under any letter of
         credit) to induce the creation of which the guaranteeing person has
         issued a reimbursement, counterindemnity or similar obligation, in
         either case guaranteeing or in effect guaranteeing any Indebtedness,
         leases, dividends or other obligations (the "primary obligations") of
         any other third Person (the "primary obligor") in any manner, whether
         directly or indirectly, including, without limitation, any obligation
         of the guaranteeing person, whether or not contingent, (i) to purchase
         any such primary obligation or any property constituting direct or
         indirect security therefor, (ii) to advance or supply funds (1) for
         the purchase or payment of any such primary obligation or (2) to
         maintain working capital or equity capital of the primary obligor or
         otherwise to maintain the net worth or solvency of the primary
         obligor, (iii) to purchase property, securities or services primarily
         for the purpose of assuring the owner of any such primary obligation
         of the ability of the primary obligor to make payment of such primary
         obligation or (iv) otherwise to assure or hold harmless the owner of
         any such primary obligation against loss in respect thereof; provided,
         however, that the term Guarantee Obligation shall not include
         indorsements of instruments for deposit or collection in the ordinary
         course of business.  The amount of any Guarantee Obligation of any
<PAGE>   12
                                                                               7


         guaranteeing person shall be deemed to be the lower of (a) an amount
         equal to the stated or determinable amount of the primary obligation
         in respect of which such Guarantee Obligation is made and (b) the
         maximum amount for which such guaranteeing person may be liable
         pursuant to the terms of the instrument embodying such Guarantee
         Obligation, unless such primary obligation and the maximum amount for
         which such guaranteeing person may be liable are not stated or
         determinable, in which case the amount of such Guarantee Obligation
         shall be such guaranteeing person's maximum reasonably anticipated
         liability in respect thereof as determined by the Borrower in good
         faith.

                 "Indebtedness":  of any Person at any date, (a) all
         indebtedness of such Person for borrowed money or for the deferred
         purchase price of property or services (other than current trade
         liabilities incurred in the ordinary course of business and payable in
         accordance with customary practices), (b) any other indebtedness of
         such Person which is evidenced by a note, bond, debenture or similar
         instrument, (c) all obligations of such Person under Financing Leases,
         (d) all obligations of such Person in respect of acceptances issued or
         created for the account of such Person and (e) all liabilities secured
         by any Lien on any property owned by such Person even though such
         Person has not assumed or otherwise become liable for the payment
         thereof.

                 "Independent Engineer": Williamson Petroleum Consultants,
         Inc., and/or such other independent petroleum engineering company as
         the Borrower may designate that is acceptable to the Agent and the
         Co-Agent.

                 "Insolvency":  with respect to any Multiemployer Plan, the
         condition that such Plan is insolvent within the meaning of Section
         4245 of ERISA.

                 "Insolvent":  pertaining to a condition of Insolvency.

                 "Intellectual Property": as defined in subsection 3.9.

                 "Interest Payment Date":  (a) as to any ABR Loan, the last day
         of each calendar month to occur while such ABR Loan is outstanding and
         the Termination Date, (b) as to any Eurodollar Loan having an Interest
         Period of one, two or three months, the last day of such Interest
         Period, and (c) as to any Eurodollar Loan having an Interest Period of
         six months, each day which is three months after the first day of such
         Interest Period and the last day of such Interest Period.

                 "Interest Period":  with respect to any Eurodollar Loan:

                          (i) initially, the period commencing on the borrowing
                 or conversion date, as the case may be, with respect to such
                 Eurodollar Loan and ending one, two, three or six months
                 thereafter, as selected by the Borrower in its notice of
                 borrowing or notice of conversion, as the case may be, given
                 with respect thereto; and

                          (ii)  thereafter, each period commencing on the last
                 day of the next preceding Interest Period applicable to such
                 Eurodollar Loan and ending one, two, three or six months
                 thereafter, as selected by the Borrower by irrevocable notice
<PAGE>   13
                                                                               8


                 to the Agent not less than three Business Days prior to the
                 last day of the then current Interest Period with respect
                 thereto;

         provided that, all of the foregoing provisions relating to Interest
         Periods are subject to the following:

                          (1)  if any Interest Period pertaining to a
                 Eurodollar Loan would otherwise end on a day that is not a
                 Business Day, such Interest Period shall be extended to the
                 next succeeding Business Day unless the result of such
                 extension would be to carry such Interest Period into another
                 calendar month in which event such Interest Period shall end
                 on the immediately preceding Business Day;

                          (2) any Interest Period that would otherwise extend
                 beyond the Termination Date shall end on the Termination Date;
                 and

                          (3) any Interest Period pertaining to a Eurodollar
                 Loan that begins on the last Business Day of a calendar month
                 (or on a day for which there is no numerically corresponding
                 day in the calendar month at the end of such Interest Period)
                 shall end on the last Business Day of a calendar month.

                 "Interest Rate Protection Agreement":  any interest rate
         protection agreement, interest rate futures contract, interest rate
         option, interest rate cap, interest rate swap or other interest rate
         hedge arrangement, to or under which the Borrower or any of its
         Subsidiaries is a party or a beneficiary on the date hereof or becomes
         a party or a beneficiary after the date hereof.

                 "KNE":  K N Energy, Inc., a Kansas corporation.

                 "Lien":  any mortgage, pledge, hypothecation, assignment,
         deposit arrangement, encumbrance, lien (statutory or other), charge or
         other security interest or any preference, priority or other security
         agreement or preferential arrangement of any kind or nature whatsoever
         (including, without limitation, any conditional sale or other title
         retention agreement and any Financing Lease having substantially the
         same economic effect as any of the foregoing).

                 "Loan Documents":  this Agreement, the Subsidiaries Guarantee
         and any Notes.

                 "Majority Lenders":  at any time, Lenders the Commitment
         Percentages of which aggregate more than 50%.

                 "Material Adverse Effect":  a material adverse effect on (a)
         the business, operations, property, condition (financial or
         otherwise), results of operations, assets, liabilities or prospects of
         the Borrower and its Subsidiaries taken as a whole, (b) the ability of
         the Borrower to perform any of its obligations under the Loan
         Documents or (c) the validity or enforceability of this or any of the
         other Loan Documents or the rights or remedies of the Agent or the
         Lenders hereunder or thereunder.

                 "Material Environmental Amount":  an amount not otherwise
         covered by insurance payable by the Borrower and/or its Subsidiaries
         in excess of $5,000,000 for
<PAGE>   14
                                                                               9


         remedial costs, compliance costs, compensatory damages, punitive
         damages, fines, penalties or any combination thereof.

                 "Materials of Environmental Concern":  any hazardous or toxic
         substances, materials or wastes, defined or regulated as such in or
         under any Environmental Law, including, without limitation, asbestos,
         polychlorinated biphenyls and urea-formaldehyde insulation.

                 "Maximum Loan Amount":  $75,000,000, or such lesser amount to
         which the aggregate Commitments may be reduced pursuant to subsection
         2.4 hereof.

                 "Multiemployer Plan":  a Plan which is a multiemployer plan as
         defined in Section 4001(a)(3) of ERISA.

                 "Net Cash Proceeds":  means, with respect to any sale or other
         disposition of securities, the cash proceeds (including cash
         equivalents and any cash payments received by way of deferred payment
         of principal pursuant to a note or installment receivable or purchase
         price adjustment receivable or otherwise, but only as and when
         received) of such sale or other disposition received by the Borrower
         or any of its Subsidiaries, net of all attorneys' fees, accountants'
         fees, investment banking fees and other customary fees actually
         incurred by the Borrower or any of its Subsidiaries and documented in
         connection therewith and net of taxes paid or reasonably expected to
         be payable by the Borrower or any of its Subsidiaries as a result
         thereof.

                 "Non-Excluded Taxes":  as defined in subsection 2.16.

                 "Notes":  the Revolving Credit Notes.

                 "Optional Reserve Report":  as defined in subsection
         2.6(b)(ii).

                 "Participant":  as defined in subsection 9.6(b).

                 "Partnership":  Wind River - Pavillion, Ltd., a Texas limited
         partnership.

                 "PBGC":  the Pension Benefit Guaranty Corporation established
         pursuant to Subtitle A of Title IV of ERISA.

                 "Person":  an individual, partnership, corporation, business
         trust, joint stock company, trust, unincorporated association, joint
         venture, Governmental Authority or other entity of whatever nature.

                 "Petroleum":  oil, gas and other liquid or gaseous
         hydrocarbons, including, without limitation, all liquefiable
         hydrocarbons and other products which may be extracted from gas and
         gas condensate by the processing thereof in a gas processing plant.

                 "Petroleum Price Hedge Agreement":  any hedge arrangement,
         commodity swap agreement, commodity futures, forwards, options, and
         other similar agreements relating to Petroleum.
<PAGE>   15
                                                                              10



                 "Plan":  at a particular time, any employee benefit plan which
         is covered by ERISA and in respect of which the Borrower or a Commonly
         Controlled Entity is (or, if such plan were terminated at such time,
         would under Section 4069 of ERISA be deemed to be) an "employer" as
         defined in Section 3(5) of ERISA.

                 "Properties":  as defined in subsection 3.16(a).

                 "Register":  as defined in subsection 9.6(d).

                 "Regulation U":  Regulation U of the Board of Governors of the
         Federal Reserve System as in effect from time to time.

                 "Reorganization":  with respect to any Multiemployer Plan, the
         condition that such plan is in reorganization within the meaning of
         Section 4241 of ERISA.

                 "Reportable Event":  any of the events set forth in Section
         4043(b) of ERISA, other than those events as to which the thirty day
         notice period is waived under subsections .13, .14, .16, .18, .19 or
         .20 of PBGC Reg. ' 2615.

                 "Required Lenders":  at any time, Lenders the Commitment
         Percentages of which aggregate at least 66-2/3%.

                 "Requirement of Law":  as to any Person, the Certificate of
         Incorporation and By-Laws or other organizational or governing
         documents of such Person, and any law, treaty, rule or regulation or
         determination of an arbitrator or a court or other Governmental
         Authority, in each case applicable to or binding upon such Person or
         any of its property or to which such Person or any of its property is
         subject.

                 "Reserve Report":  as defined in subsection 2.6(b).

                 "Responsible Officer":  the Chairman of the Board of
         Directors, President or Executive Vice-President of the Borrower or,
         with respect to financial matters, the Chief Financial Officer or the
         principal accounting or financial officer of the Borrower.

                 "Retex":  Retex Gathering Company, Inc., a Wyoming
         corporation.

                 "Revolving Credit Loans":  as defined in subsection 2.1.

                 "Revolving Credit Note":  as defined in subsection 2.5(e).

                 "Single Employer Plan":  any Plan which is covered by Title IV
         of ERISA, but which is not a Multiemployer Plan.

                 "Subsidiary":  as to any Person, a corporation, partnership or
         other entity of which shares of stock or other ownership interests
         having ordinary voting power (other than stock or such other ownership
         interests having such power only by reason of the happening of a
         contingency) to elect a majority of the board of directors or other
         managers of such corporation, partnership or other entity are at the
         time owned, or the management of which is otherwise controlled,
         directly or indirectly through one or more
<PAGE>   16
                                                                              11


         intermediaries, or both, by such Person.  Unless otherwise qualified,
         all references to a "Subsidiary" or to "Subsidiaries" in this
         Agreement shall refer to a Subsidiary or Subsidiaries of the Borrower.

                 "Subsidiary Guarantor":  each of TBI Production Company, TBI
         Exploration Inc. and TBI West Virginia Inc.

                 "Subsidiaries Guarantee":  the Subsidiaries Guarantee, to be
         entered into by each Subsidiary Guarantor, substantially in the form
         of Exhibit B attached hereto as the same may be amended, supplemented
         or otherwise modified from time to time.

                 "Termination Date":  the third anniversary of the Effective
         Date.

                 "Transferee":  as defined in subsection 9.6(f).

                 "Type":  as to any Revolving Credit Loan, its nature as an ABR
         Loan or a Eurodollar Loan.

                 "Utilization Percentage":  on any day, the aggregate
         outstanding principal amount of the Revolving Credit Loans outstanding
         on such date divided by the Borrowing Base on such date.

                 "Wildhorse":  Wildhorse Energy Partners, LLC, a Delaware
         limited liability company.

                 "Wildhorse Limited Liability Company Agreement":  the Limited
         Liability Company Agreement between KNE and the Borrower for the
         formation of Wildhorse, dated January 31, 1996 and delivered by the
         Borrower to the Lenders.

                 "Wind River Joint Venture":  the joint venture between Retex
         and K N Gas Gathering, Inc., pursuant to the Wind River Joint Venture
         Agreement.

                 "Wind River Joint Venture Agreement":  the Amended and
         Restated Joint Venture Agreement, dated June 1, 1993, between Retex
         and K N Gas Gathering, Inc., a Colorado corporation.

                 1.2  Other Definitional Provisions.  (a)  Unless otherwise
specified therein, all terms defined in this Agreement shall have the defined
meanings when used in any Notes or any certificate or other document made or
delivered pursuant hereto.

                 (b)  As used herein and in any Notes, and any certificate or
other document made or delivered pursuant hereto, accounting terms relating to
the Borrower and its Subsidiaries not defined in subsection 1.1 and accounting
terms partly defined in subsection 1.1, to the extent not defined, shall have
the respective meanings given to them under GAAP.

                 (c)  The words "hereof", "herein" and "hereunder" and words of
similar import when used in this Agreement shall refer to this Agreement as a
whole and not to any particular provision of this Agreement, and Section,
subsection, Schedule and Exhibit references are to this Agreement unless
otherwise specified.
<PAGE>   17
                                                                              12



                 (d)      The meanings given to terms defined herein shall be
equally applicable to both the singular and plural forms of such terms.

                  SECTION 2.  AMOUNT AND TERMS OF COMMITMENTS

                 2.1  Commitments.  (a)  Subject to the terms and conditions
hereof (including, without limitation, Section 4.2(c)), each Lender severally
agrees to make revolving credit loans ("Revolving Credit Loans") to the
Borrower from time to time during the Commitment Period in an aggregate
principal amount at any one time outstanding not to exceed the amount of such
Lender's Commitment Percentage of the Available Commitment.  During the
Commitment Period the Borrower may use the Commitments by borrowing, prepaying
the Revolving Credit Loans in whole or in part, and reborrowing, all in
accordance with the terms and conditions hereof.

                 (b)      The Revolving Credit Loans may from time to time be
(i) Eurodollar Loans, (ii) ABR Loans or (iii) a combination thereof, as
determined by the Borrower and notified to the Agent in accordance with
subsections 2.2 and 2.8; provided that no Revolving Credit Loan shall be made
as a Eurodollar Loan after the day that is one month prior to the Termination
Date.

                 2.2  Procedure for Revolving Credit Borrowing.   The Borrower
may borrow under the Commitments during the Commitment Period on any Business
Day; provided that the Borrower shall give the Agent irrevocable notice (which
notice must be received by the Agent prior to 10:00 A.M., New York City time,
(a) three Business Days prior to the requested Borrowing Date, if all or any
part of the requested Revolving Credit Loans are to be initially Eurodollar
Loans, or (b) one Business Day prior to the requested Borrowing Date,
otherwise), specifying (i) the amount to be borrowed, (ii) the requested
Borrowing Date, (iii) whether the borrowing is to be of Eurodollar Loans, ABR
Loans, or a combination thereof and (iv) if the borrowing is to be entirely or
partly of Eurodollar Loans, the respective amounts of each such Type of
Revolving Credit Loan and the respective lengths of the initial Interest
Periods therefor.  Each borrowing under the Commitments shall be in an amount
equal to (x) in the case of ABR Loans, $500,000 or a whole multiple thereof and
(y) in the case of Eurodollar Loans, $1,000,000 or a whole multiple of $100,000
in excess thereof.  Upon receipt of any such notice from the Borrower, the
Agent shall promptly notify each Lender thereof.  Each Lender will make the
amount of its pro rata share of each borrowing available to the Agent for the
account of the Borrower at the office of the Agent specified in subsection 9.2
prior to 11:00 A.M., New York City time, on the Borrowing Date requested by the
Borrower in funds immediately available to the Agent.  Such borrowing will then
be made available to the Borrower by the Agent crediting the account of the
Borrower on the books of such office with the aggregate of the amounts made
available to the Agent by the Lenders and in like funds as received by the
Agent.

                 2.3  Fees.  The Borrower agrees to pay to the Agent for the
account of the Lenders a commitment fee for the period from and including the
first day of the Commitment Period to the Termination Date, computed at the
Commitment Fee Rate on the average daily amount of the unutilized part of the
Available Commitment of such Lender during the period for which payment is
made, payable quarterly in arrears on the last day of each March, June,
September and December and on the Termination Date or such earlier date as the
Commitments shall terminate as provided herein, commencing on the first of such
dates to occur after the date hereof.
<PAGE>   18
                                                                              13



                 2.4  Termination or Reduction of Commitments.  The Borrower
shall have the right, upon not less than five Business Days' notice to the
Agent, to terminate the Commitments or, from time to time, to reduce the amount
of the Commitments.  Any such reduction shall be in an amount equal to
$1,000,000 or a whole multiple thereof and shall reduce permanently the
Commitments then in effect.

                 2.5  Repayment of Revolving Credits; Evidence of Debt.  (a)
The Borrower hereby unconditionally promises to pay to the Agent for the
account of each Lender the then unpaid principal amount of each Revolving
Credit Loan of such Lender in full on the Termination Date (or such earlier
date on which the Revolving Credit Loans become due and payable pursuant to
Section 7).  The Borrower hereby further agrees to pay interest on the unpaid
principal amount of the Revolving Credit Loans from time to time outstanding
from the date hereof until payment in full thereof at the rates per annum, and
on the dates, set forth in subsection 2.10.

                 (b)  Each Lender shall maintain in accordance with its usual
practice an account or accounts evidencing indebtedness of the Borrower to such
Lender resulting from each Revolving Credit Loan of such Lender from time to
time, including the amounts of principal and interest payable and paid to such
Lender from time to time under this Agreement.

                 (c)  The Agent shall maintain the Register pursuant to
subsection 9.6(d), and a subaccount therein for each Lender, in which shall be
recorded (i) the amount of each Revolving Credit Loan made hereunder, the Type
thereof and each Interest Period applicable thereto, (ii) the amount of any
principal or interest due and payable or to become due and payable from the
Borrower to each Lender hereunder and (iii) both the amount of any sum received
by the Agent hereunder from the Borrower and each Lender's share thereof.

                 (d)  The entries made in the Register and the accounts of each
Lender maintained pursuant to subsection 2.5(b) shall, to the extent permitted
by applicable law, be prima facie evidence of the existence and amounts of the
obligations of the Borrower therein recorded; provided, however, that the
failure of any Lender or the Agent to maintain the Register or any such
account, or any error therein, shall not in any manner affect the obligation of
the Borrower to repay (with applicable interest) the Revolving Credit Loans
made to such Borrower by such Lender in accordance with the terms of this
Agreement.

                 (e)  The Borrower agrees that the Borrower will execute and
deliver to each Lender a promissory note of the Borrower evidencing the
Revolving Credit Loans of such Lender, substantially in the form of Exhibit A
with appropriate insertions as to date and principal amount (a "Revolving
Credit Note").

                 2.6  Borrowing Base.  The Borrowing Base shall be determined
as follows:

                 (a)  Initial Borrowing Base.  The amount of the Borrowing Base
shall be  $130,000,000 during the period from the Effective Date to the date on
which the Borrower receives notice of the first determination of the Borrowing
Base by the Agent and the Co-Agent pursuant to subsection 2.6(b) and thereafter
the amount of the Borrowing Base shall be the Borrowing Base most recently
determined pursuant to subsection 2.6(b).
<PAGE>   19
                                                                              14



                 (b)  Determinations of the Borrowing Base.  (i)  No later than
45 days after June 30 and December 31 of each calendar year, commencing June
30, 1998, the Borrower shall, at its own expense, furnish to the Agent, the
Co-Agent and the Lenders a report ("Reserve Report"), in a form and substance
reasonably satisfactory to the Agent and the Co-Agent which report shall be
dated as of such June 30 or December 31 and shall set forth the Borrower's and
its Subsidiary Guarantors' interest (broken down by category) in all Borrowing
Base Assets and, in the case of the December 31 report only, a projection of
the rate of production and net operating income with respect thereto as of such
date.  Each June 30 Reserve Report shall be prepared by the Borrower and each
December 31 Reserve Report shall be prepared or audited by the Independent
Engineer.  Each June 30 Reserve Report may be prepared in summary form and
shall include a review of any material production variances, if any, from the
immediately preceding December 31 Reserve Report.

                          (ii)    At any date the Borrower may at its expense
furnish additional Reserve Reports to the Agent and the Co-Agent ("Optional
Reserve Reports"), which Optional Reserve Reports need not be prepared or
audited by an independent petroleum engineer (unless the Agent or the Co-Agent
so requests), each dated a date other than June 30 or December 31.

                          (iii)   Notwithstanding the provisions of subsection
2.6(b)(i), upon the Borrower's written request, and upon submission of an
Optional Reserve Report, the Agent and the Co-Agent shall review the Borrowing
Base and make any adjustments thereto they deem appropriate under the
circumstances; provided that in no event shall the Agent and the Co-Agent be
required to make more than two such unscheduled Borrowing Base determinations
during any calendar year.

                          (iv)    Within forty-five days after they both
receive each Reserve Report or Optional Reserve Report, the Agent and the
Co-Agent shall make a determination of the Borrowing Base provided that such
determination shall be approved by the Required Lenders, and shall notify the
Borrower of the new Borrowing Base, if any.

                          (v)     Within forty-five days after the Borrower has
notified the Agent and the Co-Agent pursuant to subsection 2.7(c) that it or
any Subsidiary Guarantor has determined to sell or otherwise dispose of any of
the Borrowing Base Assets (other than sales permitted by subsections 6.6(a),
(b), (c), (d) and (e)), the Agent and the Co-Agent shall make a redetermination
of the Borrowing Base, and shall notify the Borrower of the new Borrowing Base,
if any; provided that such redetermination and notification shall occur only if
the aggregate amount of consideration paid for Borrowing Base Assets disposed
of since the last determination of the Borrowing Base exceeds $5,000,000.

                          (vi)    The Borrower agrees to pay or reimburse the
Agent and the Co-Agent for all reasonable out-of-pocket costs and expenses
incurred in connection with (a) the examination of each Optional Reserve Report
furnished to the Agent and the Co-Agent by the Borrower, (b) the determination
of the Borrowing Base pursuant to such Reserve Report or Optional Reserve
Report, (c) the redetermination of the Borrowing Base pursuant to subsection
2.6(b)(v) and (d) the notification of the Borrower of such Borrowing Base.

                          (vii)   Each determination of the Borrowing Base
shall be made by the Agent and the Co-Agent in the exercise of their sole
discretion in accordance with the then current standards and practices of the
Agent and the Co-Agent for similar oil and gas loans,
<PAGE>   20
                                                                              15


taking into account such factors as the Agent and the Co-Agent may deem
appropriate, including, without limitation the nature and extent of the
Borrower's interest in the Borrowing Base Assets and the anticipated timing and
extent of net operating income therefrom; provided that each such determination
shall be approved by the Required Lenders.  The Agent and the Co-Agent may in
their sole discretion discount the value of any Borrowing Base Asset set forth
in a Reserve Report or an Optional Reserve Report by the same factors utilized
by it in discounting the value of comparable borrowing base assets in
comparable transactions.

                          (viii)  Each delivery by the Borrower to the Agent and
the Co-Agent of a Reserve Report or an Optional Reserve Report shall be deemed
to constitute a representation and warranty by the Borrower to the Agent and the
Co-Agent that the Borrower or the Subsidiary Guarantors, to the extent of the
interest specified in such report (and subject to exceptions disclosed in
writing to the Agent and the Co-Agent by the Borrower), has good and marketable
title to the Borrowing Base Assets and any other property rights or interests
described in such report, and that none of such Borrowing Base Assets or other
property rights or interests is subject to any Lien other than as permitted by
subsection 6.3.

                 2.7  Optional and Mandatory Prepayments.  (a)  The Borrower
may at any time and from time to time prepay the Revolving Credit Loans, in
whole or in part, without premium or penalty (subject to subsection 2.17), upon
at least four Business Days' irrevocable notice to the Agent, specifying the
date and amount of prepayment and whether the prepayment is of Eurodollar
Loans, ABR Loans or a combination thereof, and, if of a combination thereof,
the amount allocable to each.  Upon receipt of any such notice the Agent shall
promptly notify each Lender thereof.  If any such notice is given, the amount
specified in such notice shall be due and payable on the date specified
therein, together with any amounts payable pursuant to subsection 2.17.
Partial prepayments shall be in an aggregate principal amount of $1,000,000 or
a whole multiple thereof.

                 (b)  In the event the aggregate unpaid principal amount of the
Revolving Credit Loans shall at any time be in excess of the Borrowing Base at
such time, the Agent shall so notify the Borrower, and the Borrower shall,
within 30 days after such notification, either (i) prepay the principal of the
Revolving Credit Loans, in an aggregate amount at least equal to such excess,
together with accrued interest on the amount prepaid to the date of such
prepayment or (ii) take such actions as may be approved by the Agent and the
Co-Agent in their sole discretion to increase the Borrowing Base by the amount
of such excess in a manner satisfactory to the Agent and the Co-Agent.

                 (c)  In the event the Borrower or any Subsidiary Guarantor
determines to sell or otherwise dispose of any of the Borrowing Base Assets
(other than sales permitted by subsections 6.6 (a), (b), (c), (d) and (e)), the
Borrower shall immediately notify the Agent and the Co-Agent (but in no event
later than five Business Days prior to the date of such sale or disposition)
and, no later than three Business Days following the consummation of such sale
or disposition, the Borrower shall prepay the Revolving Credit Loans in an
aggregate amount equal to the net proceeds of such sale or disposition;
provided that no later than three Business Days following the redetermination
of the Borrowing Base by the Agent and the Co-Agent to reflect such sale or
disposition to the extent required by subsection 2.6(b)(v), the Borrower shall
additionally prepay the Revolving Credit Loans in an aggregate amount equal to
the excess, if any, of (i) the aggregate principal amount of outstanding
Revolving Credit Loans after reflecting payment of the net proceeds of such
asset sale or disposition over (ii) the Borrowing Base as
<PAGE>   21
                                                                              16


redetermined by the Agent and the Co-Agent to reflect such sale or disposition.

                 (d)  In the event that both ABR Loans and Eurodollar Loans are
outstanding on the date of any such mandatory prepayment made in accordance
with the terms of paragraph (b) or (c) of this Section 2.7, the Borrower shall
apply such mandatory prepayment first to prepay any or all of such outstanding
ABR Loans and next to prepay any or all of such outstanding Eurodollar Loans;
provided that in the event the Borrower shall apply such mandatory prepayment
to prepay a Eurodollar Loan on a date other than the last day of an Interest
Period with respect thereto, any losses or costs incurred by the Lenders shall
be indemnified by the Borrower in accordance with the provisions of Section
2.17.

                 2.8  Conversion and Continuation Options. (a)  The Borrower
may elect from time to time to convert Eurodollar Loans to ABR Loans by giving
the Agent at least two Business Days' prior irrevocable notice of such
election; provided that any such conversion of Eurodollar Loans may only be
made on the last day of an Interest Period with respect thereto.  The Borrower
may elect from time to time to convert ABR Loans to Eurodollar Loans by giving
the Agent at least three Business Days' prior irrevocable notice of such
election.  Any such notice of conversion to Eurodollar Loans shall specify the
length of the initial Interest Period or Interest Periods therefor.  Upon
receipt of any such notice the Agent shall promptly notify each Lender thereof.
All or any part of outstanding Eurodollar Loans and ABR Loans may be converted
as provided herein; provided that (i) no Revolving Credit Loan may be converted
into a Eurodollar Loan when any Event of Default has occurred and is continuing
and the Agent has or the Required Lenders have determined that such a
conversion is not appropriate and (ii) no Revolving Credit Loan may be
converted into a Eurodollar Loan after the date that is one month prior to the
Termination Date.

                 (b)  Any Eurodollar Loans may be continued as such upon the
expiration of the then current Interest Period with respect thereto by the
Borrower giving notice to the Agent, in accordance with the applicable
provisions of the term "Interest Period" set forth in subsection 1.1, of the
length of the next Interest Period to be applicable to such Revolving Credit
Loans; provided that no Eurodollar Loan may be continued as such (i) when any
Event of Default has occurred and is continuing and the Agent has or the
Required Lenders have determined that such a continuation is not appropriate or
(ii) after the date that is one month prior to the Termination Date; and
provided, further, that if the Borrower shall fail to give such notice or if
such continuation is not permitted such Revolving Credit Loans shall be
automatically converted to ABR Loans on the last day of such then expiring
Interest Period.

                 2.9  Minimum Amounts and Maximum Number of Tranches.  All
borrowings, conversions and continuations of Revolving Credit Loans hereunder
and all selections of Interest Periods hereunder shall be in such amounts and
be made pursuant to such elections so that, after giving effect thereto, the
aggregate principal amount of the Revolving Credit Loans comprising each
Eurodollar Tranche shall be equal to $1,000,000 or a whole multiple of $100,000
in excess thereof.  In no event shall there be more than eight Eurodollar
Tranches outstanding at any time.

                 2.10  Interest Rates and Payment Dates.  (a)  Each Eurodollar
Loan shall bear interest for each day during each Interest Period with respect
thereto at a rate per annum equal to the Eurodollar Rate determined for such
day plus the Applicable Margin.

                 (b)  Each ABR Loan shall bear interest at a rate per annum
equal to the ABR.
<PAGE>   22
                                                                              17



                 (c)  If all or a portion of (i) any principal of any Revolving
Credit Loan, (ii) any interest payable thereon, (iii) any commitment fee or
(iv) any other amount payable hereunder shall not be paid when due (whether at
the stated maturity, by acceleration or otherwise), the principal of the
Revolving Credit Loans and any such overdue interest, commitment fee or other
amount shall bear interest at a rate per annum which is (x) in the case of
principal, the rate that would otherwise be applicable thereto pursuant to the
foregoing provisions of this subsection plus 2% or (y) in the case of any such
overdue interest, commitment fee or other amount, the rate described in
paragraph (b) of this subsection plus 2%, in each case from the date of such
non-payment until such overdue principal, interest, commitment fee or other
amount is paid in full (as well after as before judgment).

                 (d)  Interest shall be payable in arrears on each Interest
Payment Date; provided that interest accruing pursuant to paragraph (c) of this
subsection shall be payable from time to time on demand.

                 2.11  Computation of Interest and Fees.  (a) Commitment fees
and, whenever it is calculated on the basis of the Prime Rate, interest shall
be calculated on the basis of a 365-(or 366-, as the case may be) day year for
the actual days elapsed; and, otherwise, interest shall be calculated on the
basis of a 360-day year for the actual days elapsed.  The Agent shall as soon
as practicable notify the Borrower and the Lenders of each determination of a
Eurodollar Rate.  Any change in the interest rate on a Revolving Credit Loan
resulting from a change in the ABR or the Eurocurrency Reserve Requirements
shall become effective as of the opening of business on the day on which such
change becomes effective.  The Agent shall as soon as practicable notify the
Borrower and the Lenders of the effective date and the amount of each such
change in interest rate.

                 (b)  Each determination of an interest rate by the Agent
pursuant to any provision of this Agreement shall be conclusive and binding on
the Borrower and the Lenders in the absence of manifest error.  The Agent
shall, at the request of the Borrower, deliver to the Borrower a statement
showing the quotations used by the Agent in determining any interest rate
pursuant to subsection 2.10(a).

                 2.12  Inability to Determine Interest Rate.  If prior to the
first day of any Interest Period:

                 (a)  the Agent shall have determined (which determination
         shall be conclusive and binding upon the Borrower) that, by reason of
         circumstances affecting the relevant market, adequate and reasonable
         means do not exist for ascertaining the Eurodollar Rate for such
         Interest Period, or

                 (b)  the Agent shall have received notice from the Majority
         Lenders that the Eurodollar Rate to be determined for such Interest
         Period will not adequately and fairly reflect the cost to such Lenders
         (as conclusively certified by such Lenders) of making or maintaining
         their affected Revolving Credit Loans during such Interest Period,

the Agent shall give telecopy or telephonic notice thereof to the Borrower and
the Lenders as soon as practicable thereafter.  If such notice is given (x) any
Eurodollar Loans requested to be made on the first day of such Interest Period
shall be made as ABR Loans, (y) any Revolving
<PAGE>   23
                                                                              18


Credit Loans that were to have been converted on the first day of such Interest
Period to Eurodollar Loans shall be converted to or continued as ABR Loans and
(z) any outstanding Eurodollar Loans shall be converted, on the first day of
such Interest Period, to ABR Loans.  Until such notice has been withdrawn by
the Agent, no further Eurodollar Loans shall be made or continued as such, nor
shall the Borrower have the right to convert Revolving Credit Loans to
Eurodollar Loans.

                 2.13  Pro Rata Treatment and Payments.  (a)  Each borrowing by
the Borrower from the Lenders hereunder, each payment by the Borrower on
account of any commitment fee hereunder and any reduction of the Commitments of
the Lenders shall be made pro rata according to the respective Commitment
Percentages of the Lenders.  Each payment (including each prepayment) by the
Borrower on account of principal of and interest on the Revolving Credit Loans
shall be made to the Agent and allocated to the Lenders pro rata according to
the respective outstanding principal amounts of the Revolving Credit Loans then
held by the Lenders.  All payments (including prepayments) to be made by the
Borrower hereunder, whether on account of principal, interest, fees or
otherwise, shall be made without set off or counterclaim and shall be made
prior to 12:00 Noon, New York City time, on the due date thereof to the Agent,
for the account of the Lenders, at the Agent's office specified in subsection
9.2, in Dollars and in immediately available funds.  The Agent shall distribute
such payments to the Lenders promptly upon receipt in like funds as received.
If any payment hereunder becomes due and payable on a day other than a Business
Day, such payment shall be extended to the next succeeding Business Day, and,
with respect to payments of principal, interest thereon shall be payable at the
then applicable rate during such extension.

                 (b)  Unless the Agent shall have been notified in writing by
any Lender prior to a borrowing that such Lender will not make the amount that
would constitute its Commitment Percentage of such borrowing available to the
Agent, the Agent may assume that such Lender is making such amount available to
the Agent, and the Agent may, in reliance upon such assumption, make available
to the Borrower a corresponding amount.  If such amount is not made available
to the Agent by the required time on the Borrowing Date therefor, such Lender
shall pay to the Agent, on demand, such amount with interest thereon at a rate
equal to the daily average Federal Funds Effective Rate for the period until
such Lender makes such amount immediately available to the Agent.  A
certificate of the Agent submitted to any Lender with respect to any amounts
owing under this subsection shall be conclusive in the absence of manifest
error.  If such Lender's Commitment Percentage of such borrowing is not made
available to the Agent by such Lender within three Business Days of such
Borrowing Date, the Agent shall also be entitled to recover such amount with
interest thereon at the rate per annum applicable to ABR Loans hereunder, on
demand, from the Borrower.

                 2.14  Illegality.  Notwithstanding any other provision herein,
if the adoption of or any change in any Requirement of Law or in the
interpretation or application thereof shall make it unlawful for any Lender to
make or maintain Eurodollar Loans as contemplated by this Agreement, (a) the
commitment of such Lender hereunder to make Eurodollar Loans, continue
Eurodollar Loans as such and convert ABR Loans to Eurodollar Loans shall
forthwith be cancelled and (b) such Lender's Revolving Credit Loans then
outstanding as Eurodollar Loans, if any, shall be converted automatically to
ABR Loans on the respective last days of the then current Interest Periods with
respect to such Revolving Credit Loans or within such earlier period as
required by law.  If any such conversion of a Eurodollar Loan occurs on a day
which is not the last day of the then current Interest Period with respect
thereto, the Borrower shall pay to such
<PAGE>   24
                                                                              19


Lender such amounts, if any, as may be required pursuant to subsection 2.17.

                 2.15  Requirements of Law.  (a)  If the adoption of or any
change in any Requirement of Law or in the interpretation or application
thereof or compliance by any Lender with any request or directive (whether or
not having the force of law) from any central bank or other Governmental
Authority made subsequent to the date hereof:

                 (i)   shall subject any Lender to any tax of any kind
         whatsoever with respect to this Agreement, any Note or any Eurodollar
         Loan, or change the basis of taxation of payments to such Lender in
         respect thereof (except for Non-Excluded Taxes covered by subsection
         2.16 and changes in the rate of tax on the overall net income of such
         Lender);

                 (ii)  shall impose, modify or hold applicable any reserve,
         special deposit, compulsory loan or similar requirement against assets
         held by, deposits or other liabilities in or for the account of,
         advances, loans or other extensions of credit by, or any other
         acquisition of funds by, any office of such Lender which is not
         otherwise included in the determination of the Eurodollar Rate; or

                 (iii) shall impose on such Lender any other condition;

and the result of any of the foregoing is to increase the cost to such Lender,
by an amount which such Lender deems to be material, of making, converting
into, continuing or maintaining Eurodollar Loans or to reduce any amount
receivable hereunder in respect thereof, then, in any such case, the Borrower
shall promptly pay such Lender such additional amount or amounts as will
compensate such Lender for such increased cost or reduced amount receivable.

                 (b)   If any Lender shall have determined that the adoption of
or any change in any Requirement of Law regarding capital adequacy or in the
interpretation or application thereof or compliance by such Lender or any
corporation controlling such Lender with any request or directive regarding
capital adequacy (whether or not having the force of law) from any Governmental
Authority made subsequent to the date hereof shall have the effect of reducing
the rate of return on such Lender's or such corporation's capital as a
consequence of its obligations hereunder to a level below that which such
Lender or such corporation could have achieved but for such adoption, change or
compliance (taking into consideration such Lender's or such corporation's
policies with respect to capital adequacy) by an amount deemed by such Lender
to be material, then from time to time, the Borrower shall promptly pay to such
Lender such additional amount or amounts as will compensate such Lender for
such reduction.

                 (c)   If any Lender becomes entitled to claim any
additional amounts pursuant to this subsection, it shall promptly notify the
Borrower (with a copy to the Agent) of the event by reason of which it has
become so entitled.  A certificate as to any additional amounts payable
pursuant to this subsection submitted by such Lender to the Borrower (with a
copy to the Agent) shall be conclusive in the absence of manifest error.  The
agreements in this subsection shall survive the termination of this Agreement
and the payment of the Revolving Credit Loans and all other amounts payable
hereunder.

                 2.16  Taxes.  (a)  All payments made by the Borrower under
this Agreement and any Notes shall be made free and clear of, and without
deduction or withholding for or on account of, any present or future income,
stamp or other taxes, levies, imposts, duties, charges,
<PAGE>   25
                                                                              20


fees, deductions or withholdings, now or hereafter imposed, levied, collected,
withheld or assessed by any Governmental Authority, excluding net income taxes
and franchise taxes (imposed in lieu of net income taxes) imposed on the Agent
or any Lender as a result of a present or former connection between the Agent
or such Lender and the jurisdiction of the Governmental Authority imposing such
tax or any political subdivision or taxing authority thereof or therein (other
than any such connection arising solely from the Agent or such Lender having
executed, delivered or performed its obligations or received a payment under,
or enforced, this Agreement or any Note).  If any such non-excluded taxes,
levies, imposts, duties, charges, fees, deductions or withholdings
("Non-Excluded Taxes") are required to be withheld from any amounts payable to
the Agent or any Lender hereunder or under any Note, the amounts so payable to
the Agent or such Lender shall be increased to the extent necessary to yield to
the Agent or such Lender (after payment of all Non-Excluded Taxes) interest or
any such other amounts payable hereunder at the rates or in the amounts
specified in this Agreement; provided, however, that the Borrower shall not be
required to increase any such amounts payable to any Lender that is not
organized under the laws of the United States of America or a state thereof if
such Lender fails to comply with the requirements of paragraph (b) of this
subsection.  Whenever any Non-Excluded Taxes are payable by the Borrower, as
promptly as possible thereafter the Borrower shall send to the Agent for its
own account or for the account of such Lender, as the case may be, a certified
copy of an original official receipt received by the Borrower showing payment
thereof.  If the Borrower fails to pay any Non-Excluded Taxes when due to the
appropriate taxing authority or fails to remit to the Agent the required
receipts or other required documentary evidence, the Borrower shall indemnify
the Agent and the Lenders for any incremental taxes, interest or penalties that
may become payable by the Agent or any Lender as a result of any such failure.
The agreements in this subsection shall survive the termination of this
Agreement and the payment of the Revolving Credit Loans and all other amounts
payable hereunder.

                 (b)  Each Lender that is not incorporated under the laws of
the United States of America or a state thereof shall:

                 (i)  deliver to the Borrower and the Agent (A) two duly
         completed copies of United States Internal Revenue Service Form 1001
         or 4224, or successor applicable form, as the case may be, and (B) an
         Internal Revenue Service Form W-8 or W-9, or successor applicable
         form, as the case may be;

                 (ii)  deliver to the Borrower and the Agent two further copies
         of any such form or certification on or before the date that any such
         form or certification expires or becomes obsolete and after the
         occurrence of any event requiring a change in the most recent form
         previously delivered by it to the Borrower; and

                 (iii)  obtain such extensions of time for filing and complete
         such forms or certifications as may reasonably be requested by the
         Borrower or the Agent;

unless in any such case an event (including, without limitation, any change in
treaty, law or regulation) has occurred prior to the date on which any such
delivery would otherwise be required which renders all such forms inapplicable
or which would prevent such Lender from duly completing and delivering any such
form with respect to it and such Lender so advises the Borrower and the Agent.
Such Lender shall certify (i) in the case of a Form 1001 or 4224, that it is
entitled to receive payments under this Agreement without deduction or
withholding of any United States federal income taxes and (ii) in the case of a
Form W-8 or W-9, that it is entitled to
<PAGE>   26
                                                                              21


an exemption from United States backup withholding tax.  Each Person that shall
become a Lender or a Participant pursuant to subsection 9.6 shall, upon the
effectiveness of the related transfer, be required to provide all of the forms
and statements required pursuant to this subsection; provided that in the case
of a Participant such Participant shall furnish all such required forms and
statements to the Lender from which the related participation shall have been
purchased.

                 2.17  Indemnity.  The Borrower agrees to indemnify each Lender
and to hold each Lender harmless from any loss or expense which such Lender may
sustain or incur as a consequence of (a) default by the Borrower in making a
borrowing of, conversion into or continuation of Eurodollar Loans after the
Borrower has given a notice requesting the same in accordance with the
provisions of this Agreement, (b) default by the Borrower in making any
prepayment after the Borrower has given a notice thereof in accordance with the
provisions of this Agreement or (c) the making of a prepayment of Eurodollar
Loans on a day which is not the last day of an Interest Period with respect
thereto.  Such indemnification may include an amount equal to the excess, if
any, of (i) the amount of interest which would have accrued on the amount so
prepaid, or not so borrowed, converted or continued, for the period from the
date of such prepayment or of such failure to borrow, convert or continue to
the last day of such Interest Period (or, in the case of a failure to borrow,
convert or continue, the Interest Period that would have commenced on the date
of such failure) in each case at the applicable rate of interest for such
Revolving Credit Loans provided for herein (excluding, however, the Applicable
Margin included therein, if any) over (ii) the amount of interest (as
reasonably determined by such Lender) which would have accrued to such Lender
on such amount by placing such amount on deposit for a comparable period with
leading banks in the interbank eurodollar market.  This covenant shall survive
the termination of this Agreement and the payment of the Revolving Credit Loans
and all other amounts payable hereunder.

                 2.18  Change of Lending Office.  Each Lender agrees that if it
makes any demand for payment under subsection 2.15 or 2.16(a), or if any
adoption or change of the type described in subsection 2.14 shall occur with
respect to it, it will use reasonable efforts (consistent with its internal
policy and legal and regulatory restrictions and so long as such efforts would
not be disadvantageous to it, as determined in its sole discretion) to
designate a different lending office if the making of such a designation would
reduce or obviate the need for the Borrower to make payments under subsection
2.15 or 2.16(a), or would eliminate or reduce the effect of any adoption or
change described in subsection 2.14.

                   SECTION 3.  REPRESENTATIONS AND WARRANTIES

                 To induce the Agent and the Lenders to enter into this
Agreement and to make the Revolving Credit Loans, the Borrower hereby
represents and warrants to the Agent and each Lender that:

                 3.1  Financial Condition.  The consolidated balance sheet of
the Borrower and its consolidated Subsidiaries as at December 31, 1997 and the
related consolidated statements of income and of cash flows for the fiscal year
ended on such date, reported on by Arthur Andersen LLP, copies of which have
heretofore been furnished to each Lender, are complete and correct and present
fairly the consolidated financial condition of the Borrower and its
consolidated Subsidiaries as at such date, and the consolidated results of
their operations and their consolidated cash flows for the fiscal year then
ended.  All such financial statements, including
<PAGE>   27
                                                                              22


the related schedules and notes thereto, have been prepared in accordance with
GAAP applied consistently throughout the periods involved (except as approved
by such accountants or Responsible Officer, as the case may be, and as
disclosed therein).  Neither the Borrower nor any of its consolidated
Subsidiaries had, at the date of the balance sheet referred to above, any
material Guarantee Obligation, contingent liability or liability for taxes, or
any long-term lease or unusual forward or long-term commitment, including,
without limitation, any interest rate or foreign currency swap or exchange
transaction, which is not reflected in the foregoing statements or in the notes
thereto.  During the period from December 31, 1997 to and including the date
hereof there has been no sale, transfer or other disposition by the Borrower or
any of its consolidated Subsidiaries of any material part of its business or
property and no purchase or other acquisition of any business or property
(including any capital stock of any other Person) material in relation to the
consolidated financial condition of the Borrower and its consolidated
Subsidiaries at December 31, 1997.

                 3.2  No Change.  (a) Since December 31, 1997 there has been no
development or event which has had or could reasonably be expected to have a
Material Adverse Effect and (b) during the period from December 31, 1997 to and
including the date hereof, except for dividends paid on the Convertible
Preferred Stock, no dividends or other distributions have been declared, paid
or made upon the Capital Stock of the Borrower nor has any of the Capital Stock
of the Borrower been redeemed, retired, purchased or otherwise acquired for
value by the Borrower or any of its Subsidiaries.

                 3.3  Corporate Existence; Compliance with Law.  Each of the
Borrower and its Subsidiaries (a) is duly organized, validly existing and in
good standing under the laws of the jurisdiction of its organization, (b) has
the corporate power and authority, and the legal right, to own and operate its
property (including, without limitation, the Borrowing Base Assets), to lease
the property it operates as lessee and to conduct the business in which it is
currently engaged, (c) is duly qualified as a foreign corporation and in good
standing under the laws of each jurisdiction where its ownership, lease or
operation of property or the conduct of its business requires such
qualification and (d) is in compliance with all Requirements of Law except to
the extent that the failure to comply therewith could not, in the aggregate,
reasonably be expected to have a Material Adverse Effect.

                 3.4  Corporate Power; Authorization; Enforceable Obligations.
The Borrower has the corporate power and authority, and the legal right, to
make, deliver and perform the Loan Documents to which it is a party and to
borrow hereunder and has taken all necessary corporate action to authorize the
borrowings on the terms and conditions of this Agreement and any Notes and to
authorize the execution, delivery and performance of the Loan Documents to
which it is a party.  No consent or authorization of, filing with, notice to or
other act by or in respect of, any Governmental Authority or any other Person
is required in connection with the borrowings hereunder or with the execution,
delivery, performance, validity or enforceability of the Loan Documents to
which the Borrower is a party.  This Agreement has been, and each other Loan
Document to which it is a party will be, duly executed and delivered on behalf
of the Borrower.  This Agreement constitutes, and each other Loan Document to
which it is a party when executed and delivered will constitute, a legal, valid
and binding obligation of the Borrower enforceable against the Borrower in
accordance with its terms, subject to the effects of bankruptcy, insolvency,
fraudulent conveyance, reorganization, moratorium and other similar laws
relating to or affecting creditors' rights generally, general equitable
principles (whether considered in a proceeding in equity or at law) and an
implied covenant of good faith and fair dealing.
<PAGE>   28
                                                                              23



                 3.5  No Legal Bar.  The execution, delivery and performance of
the Loan Documents to which the Borrower is a party, the borrowings hereunder
and the use of the proceeds thereof will not violate any Requirement of Law or
Contractual Obligation of the Borrower or of any of its Subsidiaries and will
not result in, or require, the creation or imposition of any Lien on any of its
or their respective properties or revenues pursuant to any such Requirement of
Law or Contractual Obligation.

                 3.6  No Material Litigation.  No litigation, investigation or
proceeding of or before any arbitrator or Governmental Authority is pending or,
to the knowledge of the Borrower, threatened by or against the Borrower or any
of its Subsidiaries or against any of its or their respective properties or
revenues (a) with respect to any of the Loan Documents or any of the
transactions contemplated hereby or thereby, or (b) which could reasonably be
expected to have a Material Adverse Effect.

                 3.7  No Default.  Neither the Borrower nor any of its
Subsidiaries is in default under or with respect to any of its Contractual
Obligations in any respect which could have a Material Adverse Effect.  No
Default or Event of Default has occurred and is continuing.

                 3.8  Ownership of Property; Liens.  Each of the Borrower and
its Subsidiaries has good record and marketable title in fee simple to, or a
valid leasehold interest in, all its real property (including, without
limitation, the Borrowing Base Assets), and good title to, or a valid leasehold
interest in, all its other property, and none of such property is subject to
any Lien except as permitted by subsection 6.3.

                 3.9  Intellectual Property.  The Borrower and each of its
Subsidiaries owns, or is licensed to use, all trademarks, tradenames,
copyrights, technology, know-how and processes necessary for the conduct of its
business as currently conducted except for those the failure to own or license
which could not reasonably be expected to have a Material Adverse Effect (the
"Intellectual Property").  No claim has been asserted and is pending by any
Person challenging or questioning the use of any such Intellectual Property or
the validity or effectiveness of any such Intellectual Property, nor does the
Borrower know of any valid basis for any such claim.  The use of such
Intellectual Property by the Borrower and its Subsidiaries does not infringe on
the rights of any Person, except for such claims and infringements that, in the
aggregate, could not reasonably be expected to have a Material Adverse Effect.

                 3.10  No Burdensome Restrictions.  No Requirement of Law or
Contractual Obligation of the Borrower or any of its Subsidiaries could
reasonably be expected to have a Material Adverse Effect.

                 3.11  Taxes.  Each of the Borrower and its Subsidiaries has
filed or caused to be filed all tax returns which, to the knowledge of the
Borrower, are required to be filed and has paid all taxes shown to be due and
payable on said returns or on any assessments made against it or any of its
property and all other taxes, fees or other charges imposed on it or any of its
property by any Governmental Authority (other than any the amount or validity
of which are currently being contested in good faith by appropriate proceedings
and with respect to which reserves in conformity with GAAP have been provided
on the books of the Borrower or its Subsidiaries, as the case may be); no tax
Lien has been filed, and, to the knowledge of the Borrower, no claim is being
asserted, with respect to any such tax, fee or other charge.
<PAGE>   29
                                                                              24



                 3.12  Federal Regulations.  No part of the proceeds of any
Revolving Credit Loans will be used for "purchasing" or "carrying" any "margin
stock" within the respective meanings of each of the quoted terms under
Regulation U of the Board of Governors of the Federal Reserve System as now and
from time to time hereafter in effect.  If requested by any Lender or the
Agent, the Borrower will furnish to the Agent and each Lender a statement to
the foregoing effect in conformity with the requirements of Regulation U.

                 3.13  ERISA.  Neither a Reportable Event nor an "accumulated
funding deficiency" (within the meaning of Section 412 of the Code or Section
302 of ERISA) has occurred during the five-year period prior to the date on
which this representation is made or deemed made with respect to any Plan, and
each Plan has complied in all material respects with the applicable provisions
of ERISA and the Code.  No termination of a Single Employer Plan has occurred,
and no Lien in favor of the PBGC or a Plan has arisen, during such five-year
period.  The present value of all accrued benefits under each Single Employer
Plan (based on those assumptions used to fund such Plans) did not, as of the
last annual valuation date prior to the date on which this representation is
made or deemed made, exceed the value of the assets of such Plan allocable to
such accrued benefits.  Neither the Borrower nor any Commonly Controlled Entity
has had a complete or partial withdrawal from any Multiemployer Plan, and
neither the Borrower nor any Commonly Controlled Entity would become subject to
any liability under ERISA if the Borrower or any such Commonly Controlled
Entity were to withdraw completely from all Multiemployer Plans as of the
valuation date most closely preceding the date on which this representation is
made or deemed made.  No such Multiemployer Plan is in Reorganization or
Insolvent.

                 3.14  Investment Company Act; Public Utility Holding Company
Act; Other Regulations.  The Borrower is not (a) an "investment company", or a
company "controlled" by an "investment company", within the meaning of the
Investment Company Act of 1940, as amended or (b) a "holding company" as
defined in, or otherwise subject to regulation under, the Public Utility
Holding Company Act of 1935.  The Borrower is not subject to regulation under
any Federal or State statute or regulation (other than Regulation X of the
Board of Governors of the Federal Reserve System) which limits its ability to
incur Indebtedness.

                 3.15  Purpose of Revolving Credit Loans.  The proceeds of the
Revolving Credit Loans shall be used by the Borrower to refinance the loans
outstanding under the Existing Agreement and for general corporate purposes in
the ordinary course of business.

                 3.16  Environmental Matters.  Except for environmental matters
which in the aggregate, could not reasonably be expected to either (a) result
in the existence of an unsatisfied liability in excess of a Material
Environmental Amount or (b) have a Material Adverse Effect:

                 (a)  To the best of the Borrower's knowledge, the facilities
         and properties owned, leased or operated by the Borrower or any of its
         Subsidiaries (the "Properties") do not contain, and have not
         previously contained, any Materials of Environmental Concern in
         amounts or concentrations which (i) constitute or constituted a
         violation of, or (ii) could give rise to liability under, any
         Environmental Law.

                 (b)  To the best of the Borrower's knowledge, the Properties
         and all operations at the Properties are in compliance, and have in
         the last five years been in compliance, with
<PAGE>   30
                                                                              25


         all applicable Environmental Laws, and there is no contamination at,
         under or about the Properties or violation of any Environmental Law
         with respect to the Properties or the business operated by the
         Borrower or any of its Subsidiaries (the "Business").

                 (c)  Neither the Borrower nor any of its Subsidiaries has
         received any notice of violation, alleged violation, non-compliance,
         liability or potential liability regarding environmental matters or
         compliance with Environmental Laws with regard to any of the
         Properties or the Business, nor does the Borrower have knowledge or
         reason to believe that any such notice will be received or is being
         threatened.

                 (d)  To the best of the Borrower's knowledge, materials of
         Environmental Concern have not been transported, or disposed of, from
         the Properties in violation of, or in a manner or to a location which
         could reasonably be expected to give rise to liability under, any
         Environmental Law, nor have any Materials of Environmental Concern
         been generated, treated, stored or disposed of at, on or under any of
         the Properties in violation of, or in a manner that could reasonably
         be expected to give rise to liability under, any applicable
         Environmental Law.

                 (e)  No judicial proceeding or governmental or administrative
         action is pending or, to the knowledge of the Borrower, threatened,
         under any Environmental Law to which the Borrower or any Subsidiary is
         or will be named as a party with respect to the Properties or the
         Business, nor are there any consent decrees or other decrees, consent
         orders, administrative orders or other orders, or other administrative
         or judicial requirements outstanding under any Environmental Law with
         respect to the Properties or the Business.

                 (f)  To the best of the Borrower's knowledge, there has been
         no release or threat of release of Materials of Environmental Concern
         at or from the Properties, or arising from or related to the
         operations of the Borrower or any Subsidiary in connection with the
         Properties or otherwise in connection with the Business, in violation
         of or in amounts or in a manner that could reasonably be expected to
         give rise to liability under Environmental Laws.

                 3.17  Insurance.  The Borrower and each of its Subsidiaries
maintain with financially sound and reputable insurance companies insurance in
at least such amounts and against at least such risks (but including in any
event public liability) as are usually insured against in the same general area
by companies engaged in the same or a similar business and such insurance is
otherwise in compliance with the Loan Documents.

                 3.18  Subsidiaries.  On the Effective Date, the Subsidiaries
of the Borrower, and its respective direct or indirect ownership interest in
each thereof, shall be as set forth in Schedule 3.18 hereto.

                        SECTION 4.  CONDITIONS PRECEDENT

                 4.1  Conditions to Effectiveness.  This Agreement shall become
effective upon, and the agreement of each Lender to make the initial Revolving
Credit Loan requested to be made by it is subject to, the satisfaction no later
than May 15, 1998 of the following conditions precedent:
<PAGE>   31
                                                                              26



                 (a)  Loan Documents.  The Agent shall have received (i) this
         Agreement, executed and delivered by a duly authorized officer of the
         Borrower, with a counterpart for each Lender, (ii) the Subsidiaries
         Guarantee, executed and delivered by a duly authorized officer of each
         Subsidiary Guarantor, with a counterpart for each Lender, and (iii)
         for the account of each Lender, a Revolving Credit Note in form and
         substance reasonably acceptable to the Agent and the Agent's counsel
         executed and delivered by a duly authorized officer of the Borrower.

                 (b)  Effective Certificate.  The Agent shall have received,
         with a counterpart for each Lender, a certificate of the Borrower and
         each Subsidiary Guarantor, dated the Effective Date, substantially in
         the form of Exhibit C, with appropriate insertions and attachments,
         satisfactory in form and substance to the Agent, executed by the
         Chairman of the Board of Directors, President, any Vice President or
         the Secretary or any Assistant Secretary of the Borrower and each
         Subsidiary Guarantor.

                 (c)  Corporate Proceedings.  The Agent shall have received,
         with a counterpart for each Lender, a copy of the resolutions, in form
         and substance satisfactory to the Agent, of the Board of Directors of
         the Borrower and each Subsidiary Guarantor authorizing (i) the
         execution, delivery and performance of the Loan Documents to which it
         is a party and (ii) in the case of the Borrower, the borrowings
         contemplated hereunder, certified by the Secretary or an Assistant
         Secretary of the Borrower and of each such Subsidiary Guarantor, as
         the case may be, as of the Effective Date, which certificate shall be
         in form and substance satisfactory to the Agent and the Agent's
         counsel and shall state that the resolutions thereby certified have
         not been amended, modified, revoked or rescinded.

                 (d)  Incumbency Certificates.  The Agent shall have received,
         with a counterpart for each Lender, a Certificate of the Borrower and
         each Subsidiary Guarantor, dated the Effective Date, as to the
         incumbency and signature of the officers of the Borrower and the
         Subsidiary Guarantors executing any Loan Document satisfactory in form
         and substance to the Agent, executed by the Chairman of the Board of
         Directors, President or any Vice President and the Secretary or any
         Assistant Secretary of the Borrower and each Subsidiary Guarantor.

                 (e)  Corporate Documents.  The Agent shall have received, with
         a counterpart for each Lender, true and complete copies of the
         certificate of incorporation and by-laws of the Borrower certified as
         of the Effective Date as complete and correct copies thereof by the
         Secretary or an Assistant Secretary of the Borrower.

                 (f)  Fees.  The Agent shall have received any fees and
         expenses required to be received by it on the Effective Date pursuant
         to the Loan Documents and the Fee Letter.

                 (g)  Legal Opinion.  The Agent shall have received, with a
         counterpart for each Lender, the executed legal opinion of Lynch,
         Chappell & Alsup, a professional corporation, counsel to the Borrower
         and each Subsidiary Guarantor, substantially in the form of Exhibit D;
         such legal opinion shall cover such other matters incident to the
         transactions contemplated by this Agreement as the Agent and the
         Agent's counsel may reasonably require.
<PAGE>   32
                                                                              27



                 (h)  Reserve Report.  Notwithstanding the provisions of
         subsection 2.6(b), the Agent and the Co-Agent shall have received,
         with a counterpart for each Lender, a Reserve Report with respect to
         the Borrower and its Subsidiaries dated as of December 31, 1997
         complying in all other respects with the provisions of subsection
         2.6(b) and such other reserve information as may be requested by the
         Agent and the Co-Agent, all of which shall be satisfactory in form and
         substance to the Agent and the Co-Agent.

                 (i)  Existing Agreement.  All amounts owed with respect to the
         Existing Agreement shall have been paid in full and the Existing
         Agreement and all commitments thereunder shall have been terminated.

                 4.2  Conditions to Each Revolving Credit Loan.  The agreement
of each Lender to make any Revolving Credit Loan requested to be made by it on
any date (including, without limitation, its initial Revolving Credit Loan) is
subject to the satisfaction of the following conditions precedent:

                 (a)  Representations and Warranties.  Each of the
         representations and warranties made by the Borrower and the Subsidiary
         Guarantors in or pursuant to the Loan Documents shall be true and
         correct in all material respects on and as of such date as if made on
         and as of such date.

                 (b)  No Default.  No Default or Event of Default shall have
         occurred and be continuing on such date or after giving effect to the
         Revolving Credit Loans requested to be made on such date.

                 (c)  Maintenance of Borrowing Base.  Notwithstanding
         subsection 2.7(b), after giving effect to the Revolving Credit Loans
         requested to be made on any date, the aggregate amount of the
         Revolving Credit Loans then outstanding shall not exceed the Borrowing
         Base then in effect.

                 (d)  No Material Litigation.  No litigation, investigation or
         proceeding of or before any arbitrator or Governmental Authority shall
         be pending or, to the knowledge of the Borrower, threatened by or
         against the Borrower or any of its Subsidiaries or against any of its
         or their respective properties or revenues (a) with respect to any of
         the Loan Documents or any of the transactions contemplated hereby or
         thereby, or (b) which could reasonably be expected to have a Material
         Adverse Effect.

                 (e)  Borrowing Base Certificate.  The Agent shall have
         received, with a counterpart for each Lender, a Borrowing Base
         certificate substantially in the form of Exhibit E, with appropriate
         insertions.

                 (f)  Additional Matters.  All corporate and other proceedings,
         and all documents, instruments and other legal matters in connection
         with the transactions contemplated by this Agreement and the other
         Loan Documents shall be satisfactory in form and substance to the
         Agent, and the Agent shall have received such other documents and
         legal opinions in respect of any aspect or consequence of the
         transactions contemplated hereby or thereby as it shall reasonably
         request.

Each borrowing by the Borrower hereunder shall constitute a representation and
warranty by the
<PAGE>   33
                                                                              28


Borrower as of the date thereof that the conditions contained in this subsection
have been satisfied.

                       SECTION 5.  AFFIRMATIVE COVENANTS

                 The Borrower hereby agrees that, so long as the Commitments
remain in effect or any amount is owing to any Lender or the Agent hereunder or
under any other Loan Document, the Borrower shall and (except in the case of
delivery of financial information, reports and notices) shall cause each of its
Subsidiaries to:

                 5.1  Financial Statements.  Furnish to each Lender:

                 (a)  as soon as available, but in any event within 90 days
         after the end of each fiscal year of the Borrower, a copy of the
         consolidated balance sheet of the Borrower and its consolidated
         Subsidiaries as at the end of such year and the related consolidated
         statements of income and retained earnings and of cash flows for such
         year, setting forth in each case in comparative form the figures for
         the previous year, reported on without a "going concern" or like
         qualification or exception, or qualification arising out of the scope
         of the audit, by Arthur Andersen LLP or other independent certified
         public accountants of nationally recognized standing; and

                 (b)  as soon as available, but in any event not later than 45
         days after the end of each of the first three quarterly periods of
         each fiscal year of the Borrower, the unaudited consolidated balance
         sheet of the Borrower and its consolidated Subsidiaries as at the end
         of such quarter and the related unaudited consolidated statements of
         income and retained earnings and of cash flows of the Borrower and its
         consolidated Subsidiaries for such quarter and the portion of the
         fiscal year through the end of such quarter, setting forth in each
         case in comparative form the figures for the previous year, certified
         by a Responsible Officer as being fairly stated in all material
         respects (subject to normal year-end audit adjustments);

all such financial statements shall be complete and correct in all material
respects and shall be prepared in reasonable detail and in accordance with GAAP
applied consistently throughout the periods reflected therein and with prior
periods (except as approved by such accountants or officer, as the case may be,
and disclosed therein).

                 5.2  Certificates; Other Information.  Furnish to each Lender:

                 (a)  concurrently with the delivery of the financial
         statements referred to in subsection 5.1(a), a certificate of the
         independent certified public accountants reporting on such financial
         statements stating that in making the examination necessary therefor
         no knowledge was obtained of any Default or Event of Default, except
         as specified in such certificate;

                 (b)  concurrently with the delivery of the financial
         statements referred to in subsections 5.1(a) and (b), a certificate of
         a Responsible Officer stating that, to the best of such officer's
         knowledge, the Borrower during such period has observed or performed
         all of its covenants and other agreements, and satisfied every
         condition, contained in this Agreement and the other Loan Documents to
         be observed, performed or satisfied by it,
<PAGE>   34
                                                                              29


         and that such officer has obtained no knowledge of any Default or
         Event of Default except as specified in such certificate, which
         certificate shall include the detailed calculations of such
         Responsible Officer demonstrating the Borrower's compliance with the
         financial covenants set forth in subsection 6.1;

                 (c)  not later than sixty days after the end of each fiscal
         year of the Borrower, a copy of the projections by the Borrower of the
         operating budget and cash flow budget (including capital expenditures)
         of the Borrower and its consolidated Subsidiaries for the succeeding
         fiscal year, such projections to be accompanied by a certificate of a
         Responsible Officer to the effect that such projections have been
         prepared on the basis of sound financial planning practice and that
         such Officer has no reason to believe they are incorrect or misleading
         in any material respect;

                 (d)  within five Business Days after the same are sent, copies
         of all financial statements and reports which the Borrower sends to
         its stockholders, and within five days after the same are filed,
         copies of all financial statements and reports which the Borrower may
         make to, or file with, the Securities and Exchange Commission or any
         successor or analogous Governmental Authority;

                 (e)  promptly, such additional financial and other information
         as any Lender may from time to time reasonably request.

                 5.3  Payment of Obligations.  Pay, discharge or otherwise
satisfy at or before maturity or before they become delinquent, as the case may
be, all its obligations of whatever nature, except where the amount or validity
thereof is currently being contested in good faith by appropriate proceedings
and reserves in conformity with GAAP with respect thereto have been provided on
the books of the Borrower or its Subsidiaries, as the case may be.

                 5.4  Conduct of Business and Maintenance of Existence.
Continue to engage in business of the same general type as now conducted by it
and preserve, renew and keep in full force and effect its corporate existence
and take all reasonable action to maintain all rights, privileges and
franchises necessary or desirable in the normal conduct of its business except
as otherwise permitted pursuant to subsection 6.5; comply with all Contractual
Obligations and Requirements of Law except to the extent that failure to comply
therewith could not, in the aggregate, be reasonably expected to have a
Material Adverse Effect.

                 5.5  Maintenance of Property; Insurance.  Keep all property
useful and necessary in its business in good working order and condition;
maintain with financially sound and reputable insurance companies insurance in
at least such amounts and against at least such risks (but including in any
event public liability) as are usually insured against in the same general area
by companies engaged in the same or a similar business; and furnish to each
Lender, upon written request, full information as to the insurance carried.

                 5.6  Inspection of Property; Books and Records; Discussions.
Keep proper books of records and accounts in which full, true and correct
entries in conformity with GAAP and all Requirements of Law shall be made of
all dealings and transactions in relation to its business and activities; and
permit representatives of any Lender to visit and inspect any of its properties
and examine and make abstracts from any of its books and records at any
reasonable time and as often as may reasonably be desired and to discuss the
business, operations, properties (including,
<PAGE>   35
                                                                              30


without limitation, the Borrowing Base Assets) and financial and other
condition of the Borrower and its Subsidiaries with officers and employees of
the Borrower and its Subsidiaries and with its independent certified public
accountants.

                 5.7  Notices.  Promptly give notice to the Agent and each
Lender of:

                 (a)  the occurrence of any Default or Event of Default;

                 (b)  any (i) default or event of default under any Contractual
         Obligation of the Borrower or any of its Subsidiaries or (ii)
         litigation, investigation or proceeding which may exist at any time
         between the Borrower or any of its Subsidiaries and any Governmental
         Authority, which in either case, if not cured or if adversely
         determined, as the case may be, could reasonably be expected to have a
         Material Adverse Effect;

                 (c)  any litigation or proceeding affecting the Borrower or
         any of its Subsidiaries in which the amount involved is $3,000,000
         (individually or when aggregated with any other such litigation or
         proceeding) or more and not covered by insurance or in which
         injunctive or similar relief is sought;

                 (d)  the following events, as soon as possible and in any
         event within 30 days after the Borrower knows or has reason to know
         thereof:  (i) the occurrence or expected occurrence of any Reportable
         Event with respect to any Plan, a failure to make any required
         contribution to a Plan, the creation of any Lien in favor of the PBGC
         or a Plan or any withdrawal from, or the termination, Reorganization
         or Insolvency of, any Multiemployer Plan or (ii) the institution of
         proceedings or the taking of any other action by the PBGC or the
         Borrower or any Commonly Controlled Entity or any Multiemployer Plan
         with respect to the withdrawal from, or the terminating,
         Reorganization or Insolvency of, any Plan; and

                 (e)  any development or event which could reasonably be
         expected to have a Material Adverse Effect.

Each notice pursuant to this subsection shall be accompanied by a statement of
a Responsible Officer setting forth details of the occurrence referred to
therein and stating what action the Borrower proposes to take with respect
thereto.

                 5.8  Environmental Laws.  (a)  Except as, in the aggregate,
could not reasonably be expected to either (i) result in the payment of a
Material Environmental Amount or (ii) have a Material Adverse Effect, (x)
comply with, and ensure compliance by all tenants and subtenants, if any, with,
all applicable Environmental Laws and obtain and comply with and maintain, and
ensure that all tenants and subtenants obtain and comply with and maintain, and
ensure that any and all licenses, approvals, notifications, registrations or
permits required by applicable Environmental Laws are maintained and complied
with and (y) conduct and complete all investigations, studies, sampling and
testing, and all remedial, removal and other actions required under
Environmental Laws and promptly comply with all lawful orders and directives of
all Governmental Authorities.

                 (b)  Defend, indemnify and hold harmless the Agent and the
Lenders, and their respective parents, subsidiaries, affiliates, employees,
agents, officers and directors, from and
<PAGE>   36
                                                                              31


against any and all claims, demands, penalties, fines, liabilities,
settlements, damages, costs and expenses of whatever kind or nature known or
unknown, contingent or otherwise, arising out of, or in any way relating to,
the violation of, noncompliance with or liability under any Environmental Laws
applicable to the operations of the Borrower or any of its Subsidiaries or to
the Borrowing Base Assets, or any orders, requirements or demands of
Governmental Authorities related thereto, including, without limitation,
attorneys' and consultants' fees, investigation and laboratory fees, response
costs, court costs and litigation expenses, except to the extent that any of
the foregoing are found by a final and nonappealable decision of a court of
competent jurisdiction to have resulted from the gross negligence or willful
misconduct of the party seeking indemnification therefor.  This indemnity shall
continue in full force and effect regardless of the termination of this
Agreement.

                 5.9  Borrowing Base Certificates.  Provide the Agent with a
Borrowing Base certificate substantially in the form of Exhibit E, with
appropriate insertions, (i) concurrently with the provision of a notice of
borrowing under the Commitments pursuant to subsection 2.2, (ii) concurrently
with the provision of a notice of prepayment of the Revolving Credit Loans by
the Borrower to the Agent pursuant to subsection 2.7(a), (iii) concurrently
with a prepayment of the Revolving Credit Loans pursuant to subsection 2.7(c)
and (iv) not later than 3 Business Days following a redetermination of the
Borrowing Base pursuant to subsection 2.6(b).

                         SECTION 6.  NEGATIVE COVENANTS

                 The Borrower hereby agrees that, so long as the Commitments
remain in effect or any amount is owing to any Lender or the Agent hereunder or
under any other Loan Document, the Borrower shall not, and shall not permit any
of its Subsidiaries to, directly or indirectly:

                 6.1  Financial Condition Covenants.

                 (a)  Maintenance of Consolidated Tangible Net Worth.  Permit
         Consolidated Tangible Net Worth to be less than the sum, without
         duplication, of (i) $350,000,000, (ii) 50% of the Consolidated Net
         Income for each fiscal quarter of the Borrower ending after December
         31, 1997 (so long as Consolidated Net Income is positive for the
         relevant period) and (iii) 50% of the Net Cash Proceeds of any primary
         offering (public or private) of equity securities consummated by the
         Borrower after the Effective Date.

                 (b)  Fixed Charge Coverage.  Permit for any period of four
         consecutive fiscal quarters (each such period a "Test Period") of the
         Borrower the ratio of (i) Consolidated EBITDA for such Test Period to
         (ii) Consolidated Fixed Charges for such Test Period to be less than
         2.5 to 1.0.

                 (c)  Leverage.  Permit the ratio of Consolidated Debt to
         Consolidated Total Capitalization any time to be greater than 0.45 to
         1.0.

                 6.2  Limitation on Indebtedness.  Create, incur, assume or
 suffer to exist any Indebtedness, except:

                 (a)  Indebtedness of the Borrower under this Agreement;

                 (b)  Indebtedness of the Borrower to any Subsidiary and of any
         Subsidiary
<PAGE>   37
                                                                              32


         Guarantor to the Borrower or any other Subsidiary Guarantor;

                 (c)  Indebtedness permitted under subsection 6.3;

                 (d)  Guarantee Obligations permitted under subsection 6.4;

                 (e)  additional Indebtedness of the Borrower and Retex not
         exceeding $1,500,000 in aggregate principal amount at any one time
         outstanding;

                 (f)  Indebtedness of the Partnership not exceeding $2,000,000
         in aggregate principal amount at any one time outstanding;

                 (g)  additional Indebtedness of the Partnership so long as
         such Indebtedness is non-recourse in all respects to the Borrower and
         its other Subsidiaries; and

                 (h)  letters of credit issued in the ordinary course of
         business for the account of the Borrower and its Subsidiaries in an
         aggregate face amount not exceeding $6,000,000 at any time.

                 6.3  Limitation on Liens.  Create, incur, assume or suffer to
exist any Lien upon any of its property, assets or revenues, whether now owned
or hereafter acquired, except for:

                 (a)  Liens for taxes not yet due or which are being contested
         in good faith by appropriate proceedings; provided that adequate
         reserves with respect thereto are maintained on the books of the
         Borrower or its Subsidiaries, as the case may be, in conformity with
         GAAP;

                 (b)  carriers', warehousemen's, mechanics', materialmen's,
         repairmen's, operator's or other like Liens arising in the ordinary
         course of business which are not overdue for a period of more than 60
         days or which are being contested in good faith by appropriate
         proceedings;

                 (c)  pledges or deposits in connection with workers'
         compensation, unemployment insurance and other social security
         legislation and deposits securing liability to insurance carriers
         under insurance or self-insurance arrangements;

                 (d)  deposits to secure the performance of bids, trade
         contracts (other than for borrowed money), leases, statutory
         obligations, surety and appeal bonds, performance bonds and other
         obligations of a like nature incurred in the ordinary course of
         business;

                 (e)  easements, rights-of-way, restrictions, title defects and
         other similar encumbrances incurred in the ordinary course of business
         which, in the aggregate, are not substantial in amount and which do
         not in any case materially detract from the value of the property
         subject thereto or materially interfere with the ordinary conduct of
         the business of the Borrower or such Subsidiary; and

                 (f)  Liens on properties of the Partnership securing
         Indebtedness permitted by subsections 6.2(f) and 6.2(g); provided that
         the amount of the Borrowing Base shall be reduced by the amount of any
         such Indebtedness secured by such Liens.
<PAGE>   38
                                                                              33



                 6.4  Limitation on Guarantee Obligations.  Create, incur,
assume or suffer to exist any Guarantee Obligation except:

                 (a)  Guarantee Obligations in the nature of performance bonds
         in the ordinary course of business and not in the nature of
         Indebtedness;

                 (b)  Guarantee Obligations in an aggregate amount not to
         exceed $5,000,000 at any one time outstanding; and

                 (c)  the Subsidiaries Guarantee.

                 6.5  Limitation on Fundamental Changes.  Enter into any
merger, consolidation or amalgamation, or liquidate, wind up or dissolve itself
(or suffer any liquidation or dissolution), or convey, sell, lease, assign,
transfer or otherwise dispose of, all or substantially all of its property,
business or assets, or make any material change in its present method of
conducting business, except:

                 (a)  any Subsidiary of the Borrower may be merged or
consolidated with or into the Borrower (provided that the Borrower shall be the
continuing or surviving corporation) or with or into any one or more wholly
owned Subsidiaries of the Borrower (provided that the wholly owned Subsidiary
or Subsidiaries shall be the continuing or surviving corporation); and

                 (b)  any wholly owned Subsidiary may sell, lease, transfer or
otherwise dispose of any or all of its assets (upon voluntary liquidation or
otherwise) to the Borrower or any other wholly owned Subsidiary of the
Borrower.

                 6.6  Limitation on Sale of Assets.  Convey, sell, lease,
assign, transfer or otherwise dispose of any of its property, business or
assets (including, without limitation, receivables and leasehold interests),
whether now owned or hereafter acquired, or, in the case of any Subsidiary,
issue or sell any shares of such Subsidiary's Capital Stock to any Person other
than the Borrower or any wholly owned Subsidiary, except:

                 (a)  obsolete, worn out, depleted or "uneconomic" property
         disposed of in the ordinary course of business;

                 (b)  the sale, transportation and marketing of Petroleum in
         the ordinary course of business;

                 (c)  as permitted by subsection 6.5(b);

                 (d)  undeveloped, undrilled leasehold acreage held in the
         Borrower's inventory; provided that in any fiscal year of the Borrower
         the gross proceeds of such property so disposed of shall not exceed
         $5,000,000; and

                 (e)  the sale of producing properties of the Borrower and its
         Subsidiaries; provided that in any fiscal year of the Borrower the
         gross proceeds of such sale or sales shall not in the aggregate exceed
         $10,000,000.
<PAGE>   39
                                                                              34



                 6.7  Limitation on Dividends.  Declare or pay any dividend
(other than dividends payable solely in common stock of the Borrower) on, or
make any payment on account of, or set apart assets for a sinking or other
analogous fund for, the purchase, redemption, defeasance, retirement or other
acquisition of, any shares of any class of Capital Stock of the Borrower or any
warrants or options to purchase any such Stock, whether now or hereafter
outstanding, or make any other distribution in respect thereof, either directly
or indirectly, whether in cash or property or in obligations of the Borrower or
any Subsidiary except that, so long as no Default or Event of Default is in
existence, the Borrower may pay dividends on the Convertible Preferred Stock.

                 6.8  Limitation on Investments, Acquisitions, Loans and
Advances.  Make any advance, loan, extension of credit or capital contribution
to, or purchase any stock, bonds, notes, debentures or other securities of or
any assets constituting a business unit of, or make any other investment in,
any Person, except:

                 (a)  extensions of trade credit in the ordinary course of
         business;

                 (b)  investments in Cash Equivalents;

                 (c)  loans and advances to employees of the Borrower or its
         Subsidiaries for travel, entertainment and relocation expenses in the
         ordinary course of business;

                 (d)  investments made in the ordinary course of business in
         the Partnership, the Wind River Joint Venture and Wildhorse, and
         working capital contributions to Wildhorse; provided that such
         investments and working capital contributions (including those
         investments and working capital contributions made prior to the
         effectiveness of this Agreement) do not exceed $65,000,000 in the
         aggregate; and

                 (e)  Indebtedness permitted under subsection 6.2(b).

                 6.9  Limitation on Transactions with Affiliates.  Enter into
any transaction, including, without limitation, any purchase, sale, lease or
exchange of property or the rendering of any service, with any Affiliate unless
such transaction is (a) not otherwise prohibited under this Agreement, (b) in
the ordinary course of the Borrower's or such Subsidiary's business and (c)
upon fair and reasonable terms no less favorable to the Borrower or such
Subsidiary, as the case may be, than it would obtain in a comparable arm's
length transaction with a Person which is not an Affiliate.

                 6.10  Limitation on Sales and Leasebacks.  Enter into any
arrangement with any Person providing for the leasing by the Borrower or any
Subsidiary of real or personal property which has been or is to be sold or
transferred by the Borrower or such Subsidiary to such Person or to any other
Person to whom funds have been or are to be advanced by such Person on the
security of such property or rental obligations of the Borrower or such
Subsidiary.

                 6.11  Limitation on Operating Leases.  Enter into operating
leases with any Person, except:

                 (a)  operating leases with rental obligations in an aggregate
         principal amount not exceeding $5,000,000 in any fiscal year; and
<PAGE>   40
                                                                              35



                 (b)  oil and gas leases and oil and gas operating agreements
         entered into in the ordinary course of business.

                 6.12  Limitation on Changes in Fiscal Year.  Permit the fiscal
year of the Borrower to end on a day other than December 31.

                 6.13  Limitation on Negative Pledge Clauses.  Enter into with
any Person any agreement, other than (a) this Agreement, (b) the Loan
Documents, (c) the Wind River Joint Venture Agreement, (d) the Wildhorse
Limited Liability Company Agreement, and (e) any industrial revenue bonds,
purchase money mortgages or Financing Leases permitted by this Agreement (in
which cases, any prohibition or limitation shall only be effective against the
assets financed thereby), which prohibits or limits the ability of the Borrower
or any of its Subsidiaries to create, incur, assume or suffer to exist any Lien
upon any of its property, assets or revenues, whether now owned or hereafter
acquired.

                 6.14  Limitation on Lines of Business.  Enter into any
business, either directly or through any Subsidiary, except for those
businesses in which the Borrower and its Subsidiaries are engaged on the date
of this Agreement or which are directly related thereto.

                 6.15  Limitation on Certain Agreements.  Enter into any
Petroleum Price Hedge Agreement or Interest Rate Protection Agreement except
where such agreements are entered into in the ordinary course of business (and
not for speculative purposes) and designed to protect the Borrower or any of
its Subsidiaries against fluctuations in Petroleum prices and interest rates;
provided, that with respect to Petroleum Price Hedge Agreements that the
aggregate amount of volumes of Petroleum subject to such Petroleum Price Hedge
Agreements shall not exceed 75% of the anticipated production from the
Borrower's and its Subsidiaries' proved, developed Petroleum reserves for the
period covered by such Petroleum Hedge Agreements and provided, further, that
in the event that the Borrower enters into a Petroleum Price Hedge Agreement or
Interest Rate Protection Agreement with a Lender, or an Affiliate thereof, the
net liabilities of the Borrower under such Petroleum Price Hedge Agreement or
Interest Rate Protection Agreement will rank pari passu with the Borrower's
Indebtedness under this Agreement.

                         SECTION 7.  EVENTS OF DEFAULT

                 If any of the following events shall occur and be continuing:

                 (a)  The Borrower shall fail to pay any principal of any
         Revolving Credit Loan when due in accordance with the terms thereof or
         hereof; or the Borrower shall fail to pay any interest on any
         Revolving Credit Loan, or any other amount payable hereunder, within
         five days after any such interest or other amount becomes due in
         accordance with the terms thereof or hereof; or

                 (b)  Any representation or warranty made or deemed made by the
         Borrower or any of its Subsidiaries herein or in any other Loan
         Document or which is contained in any certificate, document or
         financial or other statement furnished by it at any time under or in
         connection with this Agreement or any such other Loan Document shall
         prove to have been incorrect in any material respect on or as of the
         date made or deemed made; or

                 (c)  The Borrower shall default in the observance or
         performance of any agreement contained in Section 6; or
<PAGE>   41
                                                                              36



                 (d)  The Borrower or any of its Subsidiaries shall default in
         the observance or performance of any other agreement contained in this
         Agreement or any other Loan Document (other than as provided in
         paragraphs (a) through (c) of this Section), and such default shall
         continue unremedied for a period of 30 days; or

                 (e)  The Borrower or any of its Subsidiaries shall (i) default
         in any payment of principal of or interest of any Indebtedness (other
         than the Revolving Credit Loans) or in the payment of any Guarantee
         Obligation, beyond the period of grace (not to exceed 30 days), if
         any, provided in the instrument or agreement under which such
         Indebtedness or Guarantee Obligation was created, if the aggregate
         amount of the Indebtedness and/or Guarantee Obligations in respect of
         which such default or defaults shall have occurred is at least
         $1,000,000; or (ii) default in the observance or performance of any
         other agreement or condition relating to any such Indebtedness or
         Guarantee Obligation or contained in any instrument or agreement
         evidencing, securing or relating thereto, or any other event shall
         occur or condition exist, the effect of which default or other event
         or condition is to cause, or to permit the holder or holders of such
         Indebtedness or beneficiary or beneficiaries of such Guarantee
         Obligation (or a trustee or agent on behalf of such holder or holders
         or beneficiary or beneficiaries) to cause, with the giving of notice
         if required, such Indebtedness to become due prior to its stated
         maturity or such Guarantee Obligation to become payable; or

                 (f)  (i) The Borrower or any of its Subsidiaries shall
         commence any case, proceeding or other action (A) under any existing
         or future law of any jurisdiction, domestic or foreign, relating to
         bankruptcy, insolvency, reorganization or relief of debtors, seeking
         to have an order for relief entered with respect to it, or seeking to
         adjudicate it a bankrupt or insolvent, or seeking reorganization,
         arrangement, adjustment, winding-up, liquidation, dissolution,
         composition or other relief with respect to it or its debts, or (B)
         seeking appointment of a receiver, trustee, custodian, conservator or
         other similar official for it or for all or any substantial part of
         its assets, or the Borrower or any of its Subsidiaries shall make a
         general assignment for the benefit of its creditors; or (ii) there
         shall be commenced against the Borrower or any of its Subsidiaries any
         case, proceeding or other action of a nature referred to in clause (i)
         above which (A) results in the entry of an order for relief or any
         such adjudication or appointment or (B) remains undismissed,
         undischarged or unbonded for a period of 60 days; or (iii) there shall
         be commenced against the Borrower or any of its Subsidiaries any case,
         proceeding or other action seeking issuance of a warrant of
         attachment, execution, distraint or similar process against all or any
         substantial part of its assets which results in the entry of an order
         for any such relief which shall not have been vacated, discharged, or
         stayed or bonded pending appeal within 60 days from the entry thereof;
         or (iv) the Borrower or any of its Subsidiaries shall take any action
         in furtherance of, or indicating its consent to, approval of, or
         acquiescence in, any of the acts set forth in clause (i), (ii), or
         (iii) above; or (v) the Borrower or any of its Subsidiaries shall
         generally not, or shall be unable to, or shall admit in writing its
         inability to, pay its debts as they become due; or

                 (g)  (i) Any Person shall engage in any "prohibited
         transaction" (as defined in Section 406 of ERISA or Section 4975 of
         the Code) involving any Plan, (ii) any "accumulated funding
         deficiency" (as defined in Section 302 of ERISA), whether or not
<PAGE>   42
                                                                              37


         waived, shall exist with respect to any Plan, or any Lien in favor of
         the PBGC or a Plan shall arise on the assets of the Borrower or any
         Commonly Controlled Entity, (iii) a Reportable Event shall occur with
         respect to, or proceedings shall commence to have a trustee appointed,
         or a trustee shall be appointed, to administer or to terminate, any
         Single Employer Plan, which Reportable Event or commencement of
         proceedings or appointment of a trustee is, in the reasonable opinion
         of the Required Lenders, likely to result in the termination of such
         Plan for purposes of Title IV of ERISA, (iv) any Single Employer Plan
         shall terminate for purposes of Title IV of ERISA, (v) the Borrower or
         any Commonly Controlled Entity shall, or in the reasonable opinion of
         the Required Lenders is likely to, incur any liability in connection
         with a withdrawal from, or the Insolvency or Reorganization of, a
         Multiemployer Plan or (vi) any other event or condition shall occur or
         exist with respect to a Plan; and in each case in clauses (i) through
         (vi) above, such event or condition, together with all other such
         events or conditions, if any, could reasonably be expected to have a
         Material Adverse Effect; or

                 (h)  One or more judgments or decrees shall be entered against
         the Borrower or any of its Subsidiaries involving in the aggregate a
         liability (not paid or fully covered by insurance) of $5,000,000 or
         more, and all such judgments or decrees shall not have been vacated,
         discharged, stayed or bonded pending appeal within 60 days from the
         entry thereof; or

                 (i)  Any of the Loan Documents shall cease, for any reason, to
         be in full force and effect, or the Borrower shall so assert; or

                 (j) (i) Any Person or "group" (within the meaning of Section
         13(d) or 14(d) of the Securities Exchange Act of 1934, as amended) (A)
         shall have acquired beneficial ownership of 20% or more of any
         outstanding class of Capital Stock having ordinary voting power in the
         election of directors of the Borrower, (B) (i) shall obtain the power
         (whether or not exercised) to elect a majority of the Borrower's
         directors or (ii) the Board of Directors of the Borrower shall not
         consist of a majority of Continuing Directors; "Continuing Directors"
         shall mean the directors of the Borrower on the Effective Date and
         each other director, if such other director's nomination for election
         to the Board of Directors of the Borrower is recommended by a majority
         of the then Continuing Directors; or (ii) the Borrower shall cease to
         own 100% of the issued and outstanding Capital Stock of each of its
         Subsidiaries, or, in the case of the Partnership, shall cease to be
         the general partner; or

                 (k)  Environmental liabilities aggregating in excess of a
         Material Environmental Amount shall be (i) outstanding at any time
         with respect to the Borrower or any of its Subsidiaries or (ii) paid
         in any fiscal year of the Borrower by the Borrower or any of its
         Subsidiaries,

then, and in any such event, (A) if such event is an Event of Default specified
in clause (i) or (ii) of paragraph (f) of this Section with respect to the
Borrower, automatically the Commitments shall immediately terminate and the
Loans hereunder (with accrued interest thereon) and all other amounts owing
under this Agreement shall immediately become due and payable, and (B) if such
event is any other Event of Default, either or both of the following actions
may be taken: (i) with the consent of the Required Lenders, the Agent may, or
upon the request of the Required Lenders, the Agent shall, by notice to the
Borrower declare the Commitments to be terminated
<PAGE>   43
                                                                              38


forthwith, whereupon the Commitments shall immediately terminate; and (ii) with
the consent of the Required Lenders, the Agent may, or upon the request of the
Required Lenders, the Agent shall, by notice to the Borrower, declare the Loans
hereunder (with accrued interest thereon) and all other amounts owing under
this Agreement to be due and payable forthwith, whereupon the same shall
immediately become due and payable.  Except as expressly provided above in this
Section, presentment, demand, protest and all other notices of any kind are
hereby expressly waived.

                             SECTION 8.  THE AGENT

                 8.1  Appointment.  Each Lender hereby irrevocably designates
and appoints the Agent as the agent of such Lender under this Agreement and the
other Loan Documents, and each such Lender irrevocably authorizes the Agent, in
such capacity, to take such action on its behalf under the provisions of this
Agreement and the other Loan Documents and to exercise such powers and perform
such duties as are expressly delegated to the Agent by the terms of this
Agreement and the other Loan Documents, together with such other powers as are
reasonably incidental thereto.   Notwithstanding any provision to the contrary
elsewhere in this Agreement, the Agent shall not have any duties or
responsibilities, except those expressly set forth herein, or any fiduciary
relationship with any Lender, and no implied covenants, functions,
responsibilities, duties, obligations or liabilities shall be read into this
Agreement or any other Loan Document or otherwise exist against the Agent.

                 8.2  Delegation of Duties.  The Agent may execute any of its
duties under this Agreement and the other Loan Documents by or through agents
or attorneys-in-fact and shall be entitled to advice of counsel concerning all
matters pertaining to such duties.  The Agent shall not be responsible for the
negligence or misconduct of any agents or attorneys in-fact selected by it with
reasonable care.

                 8.3  Exculpatory Provisions.  Neither the Agent nor any of its
officers, directors, employees, agents, attorneys-in-fact or Affiliates shall
be (i) liable for any action lawfully taken or omitted to be taken by it or
such Person under or in connection with this Agreement or any other Loan
Document (except for its or such Person's own gross negligence or willful
misconduct) or (ii) responsible in any manner to any of the Lenders for any
recitals, statements, representations or warranties made by the Borrower or any
officer thereof contained in this Agreement or any other Loan Document or in
any certificate, report, statement or other document referred to or provided
for in, or received by the Agent under or in connection with, this Agreement or
any other Loan Document or for the value, validity, effectiveness, genuineness,
enforceability or sufficiency of this Agreement or any other Loan Document or
for any failure of the Borrower to perform its obligations hereunder or
thereunder.  The Agent shall not be under any obligation to any Lender to
ascertain or to inquire as to the observance or performance of any of the
agreements contained in, or conditions of, this Agreement or any other Loan
Document, or to inspect the properties, books or records of the Borrower.

                 8.4  Reliance by Agent.  The Agent shall be entitled to rely,
and shall be fully protected in relying, upon any Note, writing, resolution,
notice, consent, certificate, affidavit, letter, telecopy, telex or teletype
message, statement, order or other document or conversation believed by it to
be genuine and correct and to have been signed, sent or made by the proper
Person or Persons and upon advice and statements of legal counsel (including,
without limitation, counsel to the Borrower), independent accountants and other
experts selected by the Agent.  The
<PAGE>   44
                                                                              39


Agent may deem and treat the payee of any Note as the owner thereof for all
purposes unless a written notice of assignment, negotiation or transfer thereof
shall have been filed with the Agent.  The Agent shall be fully justified in
failing or refusing to take any action under this Agreement or any other Loan
Document unless it shall first receive such advice or concurrence of the
Required Lenders as it deems appropriate or it shall first be indemnified to
its satisfaction by the Lenders against any and all liability and expense which
may be incurred by it by reason of taking or continuing to take any such
action.  The Agent shall in all cases be fully protected in acting, or in
refraining from acting, under this Agreement and the other Loan Documents in
accordance with a request of the Required Lenders, and such request and any
action taken or failure to act pursuant thereto shall be binding upon all the
Lenders and all future holders of the Revolving Credit Loans.

                 8.5  Notice of Default.  The Agent shall not be deemed to have
knowledge or notice of the occurrence of any Default or Event of Default
hereunder unless the Agent has received notice from a Lender or the Borrower
referring to this Agreement, describing such Default or Event of Default and
stating that such notice is a "notice of default".  In the event that the Agent
receives such a notice, the Agent shall give notice thereof to the Lenders.
The Agent shall take such action with respect to such Default or Event of
Default as shall be reasonably directed by the Required Lenders; provided that
unless and until the Agent shall have received such directions, the Agent may
(but shall not be obligated to) take such action, or refrain from taking such
action, with respect to such Default or Event of Default as it shall deem
advisable in the best interests of the Lenders.

                 8.6  Non-Reliance on Agent and Other Lenders.  Each Lender
expressly acknowledges that neither the Agent nor any of its officers,
directors, employees, agents, attorneys-in-fact or Affiliates has made any
representations or warranties to it and that no act by the Agent hereinafter
taken, including any review of the affairs of the Borrower, shall be deemed to
constitute any representation or warranty by the Agent to any Lender.  Each
Lender represents to the Agent that it has, independently and without reliance
upon the Agent or any other Lender, and based on such documents and information
as it has deemed appropriate, made its own appraisal of and investigation into
the business, operations, property, financial and other condition and
creditworthiness of the Borrower and made its own decision to make its
Revolving Credit Loans hereunder and enter into this Agreement.  Each Lender
also represents that it will, independently and without reliance upon the Agent
or any other Lender, and based on such documents and information as it shall
deem appropriate at the time, continue to make its own credit analysis,
appraisals and decisions in taking or not taking action under this Agreement
and the other Loan Documents, and to make such investigation as it deems
necessary to inform itself as to the business, operations, property, financial
and other condition and creditworthiness of the Borrower.  Except for notices,
reports and other documents expressly required to be furnished to the Lenders
by the Agent hereunder, the Agent shall not have any duty or responsibility to
provide any Lender with any credit or other information concerning the
business, operations, property, condition (financial or otherwise), prospects
or creditworthiness of the Borrower which may come into the possession of the
Agent or any of its officers, directors, employees, agents, attorneys-in-fact
or Affiliates.

                 8.7  Indemnification.  The Lenders agree to indemnify the
Agent in its capacity as such (to the extent not reimbursed by the Borrower and
without limiting the obligation of the Borrower to do so), ratably according to
their respective Commitment Percentages in effect on the date on which
indemnification is sought (or, if indemnification is sought after the date upon
<PAGE>   45
                                                                              40


which the Commitments shall have terminated and the Revolving Credit Loans
shall have been paid in full, ratably in accordance with their Commitment
Percentages immediately prior to such date), from and against any and all
liabilities, obligations, losses, damages, penalties, actions, judgments,
suits, costs, expenses or disbursements of any kind whatsoever which may at any
time (including, without limitation, at any time following the payment of the
Revolving Credit Loans) be imposed on, incurred by or asserted against the
Agent in any way relating to or arising out of, the Commitments, this
Agreement, any of the other Loan Documents or any documents contemplated by or
referred to herein or therein or the transactions contemplated hereby or
thereby or any action taken or omitted by the Agent under or in connection with
any of the foregoing; provided that no Lender shall be liable for the payment
of any portion of such liabilities, obligations, losses, damages, penalties,
actions, judgments, suits, costs, expenses or disbursements resulting solely
from the Agent's gross negligence or willful misconduct.  The agreements in
this subsection shall survive the payment of the Revolving Credit Loans and all
other amounts payable hereunder.

                 8.8  Agent in Its Individual Capacity.  The Agent and its
Affiliates may make loans to, accept deposits from and generally engage in any
kind of business with the Borrower as though the Agent were not the Agent
hereunder and under the other Loan Documents.  With respect to the Revolving
Credit Loans made by it, the Agent shall have the same rights and powers under
this Agreement and the other Loan Documents as any Lender and may exercise the
same as though it were not the Agent, and the terms "Lender" and "Lenders"
shall include the Agent in its individual capacity.

                 8.9  Successor Agent.  The Agent may resign as Agent upon 10
days' notice to the Lenders.  If the Agent shall resign as Agent under this
Agreement and the other Loan Documents, then the Required Lenders shall appoint
from among the Lenders a successor agent for the Lenders, which successor agent
shall be approved by the Borrower, whereupon such successor agent shall succeed
to the rights, powers and duties of the Agent, and the term "Agent" shall mean
such successor agent effective upon such appointment and approval, and the
former Agent's rights, powers and duties as Agent shall be terminated, without
any other or further act or deed on the part of such former Agent or any of the
parties to this Agreement or any holders of the Revolving Credit Loans.  After
any retiring Agent's resignation as Agent, the provisions of this Section 8
shall inure to its benefit as to any actions taken or omitted to be taken by it
while it was Agent under this Agreement and the other Loan Documents.

                 8.10  Co-Agent.  Notwithstanding any provision to the contrary
elsewhere in this Agreement, the Co- Agent shall not have any duties or
responsibilities, except those expressly set forth herein, or any fiduciary
relationship with any Lender, and no implied covenants, functions,
responsibilities, duties, obligations or liabilities shall be read into this
Agreement or any other Loan Document or otherwise exist against the Co-Agent.
<PAGE>   46
                                                                              41



                           SECTION 9.  MISCELLANEOUS

                 9.1  Amendments and Waivers.  Neither this Agreement nor any
other Loan Document, nor any terms hereof or thereof may be amended,
supplemented or modified except in accordance with the provisions of this
subsection. The Required Lenders may, or, with the written consent of the
Required Lenders, the Agent may, from time to time, (a) enter into with the
Borrower written amendments, supplements or modifications hereto and to the
other Loan Documents for the purpose of adding any provisions to this Agreement
or the other Loan Documents or changing in any manner the rights of the Lenders
or of the Borrower hereunder or thereunder or (b) waive, on such terms and
conditions as the Required Lenders or the Agent, as the case may be, may
specify in such instrument, any of the requirements of this Agreement or the
other Loan Documents or any Default or Event of Default and its consequences;
provided, however, that no such waiver and no such amendment, supplement or
modification shall (i) reduce the amount or extend the scheduled date of
maturity of any Revolving Credit Loan or of any installment thereof, or reduce
the stated rate of any interest or fee payable hereunder or extend the
scheduled date of any payment thereof or increase the amount or extend the
expiration date of any Lender's Commitment, in each case without the consent of
each Lender affected thereby, or (ii) amend, modify or waive any provision of
this subsection or reduce the percentage specified in the definition of
Required Lenders or Majority Lenders, or consent to the assignment or transfer
by the Borrower of any of its rights and obligations under this Agreement and
the other Loan Documents, in each case without the written consent of all the
Lenders, or (iii) amend, modify or waive any provision of Section 8 without the
written consent of the then Agent.  Any such waiver and any such amendment,
supplement or modification shall apply equally to each of the Lenders and shall
be binding upon the Borrower, the Lenders, the Agent and all future holders of
the Revolving Credit Loans.  In the case of any waiver, the Borrower, the
Lenders and the Agent shall be restored to their former positions and rights
hereunder and under the other Loan Documents, and any Default or Event of
Default waived shall be deemed to be cured and not continuing; no such waiver
shall extend to any subsequent or other Default or Event of Default or impair
any right consequent thereon.

                 9.2  Notices.  All notices, requests and demands to or upon
the respective parties hereto to be effective shall be in writing (including by
facsimile transmission) and, unless otherwise expressly provided herein, shall
be deemed to have been duly given or made (a) in the case of delivery by hand,
when delivered, (b) in the case of delivery by mail, three days after being
deposited in the mails, postage prepaid, or (c) in the case of delivery by
facsimile transmission, when sent and receipt has been confirmed, addressed as
follows in the case of the Borrower and the Agent, and as set forth in Schedule
I in the case of the Lenders, or to such other address as may be hereafter
notified by the respective parties hereto:



         The Borrower:            Tom Brown, Inc.
                                           508 W. Wall, Suite 500
                                           Midland, Texas  79701
                                           Attention: Treasurer
                                           Fax: (915) 682-8707
<PAGE>   47
                                                                              42




         The Agent:                        The Chase Manhattan Bank
                                           270 Park Avenue, 32nd Floor
                                           New York, New York  10017
                                           Attention: Oil and Gas Group
                                           Fax: (212) 270-3899

                                           with a copy to:

                                           Chase Securities Inc.
                                           270 Park Avenue, 21st Floor
                                           New York, New York  10017
                                           Attention: Oil and Gas Group
                                           Fax: (212) 270-2519

provided that any notice, request or demand to or upon the Agent or the Lenders
pursuant to subsection 2.2, 2.4, 2.8, 2.9 or 2.13 shall not be effective until
received.

                 9.3  No Waiver; Cumulative Remedies.  No failure to exercise
and no delay in exercising, on the part of the Agent or any Lender, any right,
remedy, power or privilege hereunder or under the other Loan Documents shall
operate as a waiver thereof; nor shall any single or partial exercise of any
right, remedy, power or privilege hereunder preclude any other or further
exercise thereof or the exercise of any other right, remedy, power or
privilege.  The rights, remedies, powers and privileges herein provided are
cumulative and not exclusive of any rights, remedies, powers and privileges
provided by law.

                 9.4  Survival of Representations and Warranties.  All
representations and warranties made hereunder, in the other Loan Documents and
in any document, certificate or statement delivered pursuant hereto or in
connection herewith shall survive the execution and delivery of this Agreement
and the making of the Revolving Credit Loans hereunder.

                 9.5  Payment of Expenses and Taxes.  The Borrower agrees (a)
to pay or reimburse the Agent for all its out-of-pocket costs and expenses
incurred in connection with the development, preparation and execution of, and
any amendment, supplement or modification to, this Agreement and the other Loan
Documents and any other documents prepared in connection herewith or therewith,
and the consummation and administration of the transactions contemplated hereby
and thereby, including, without limitation, the reasonable fees and
disbursements of counsel to the Agent, (b) to pay or reimburse each Lender and
the Agent for all its costs and expenses incurred in connection with the
enforcement or preservation of any rights under this Agreement, the other Loan
Documents and any such other documents, including, without limitation, the fees
and disbursements of counsel to each Lender and of counsel to the Agent, (c) to
pay, indemnify, and hold each Lender and the Agent harmless from, any and all
recording and filing fees and any and all liabilities with respect to, or
resulting from any delay in paying, stamp, excise and other taxes, if any,
which may be payable or determined to be payable in connection with the
execution and delivery of, or consummation or administration of any of the
transactions contemplated by, or any amendment, supplement or modification of,
or any waiver or consent under or in respect of, this Agreement, the other Loan
Documents and any such other documents, and (d) to pay, indemnify, and hold
each Lender and the Agent harmless from and against any and all other
liabilities, obligations, losses, damages, penalties, actions, judgments,
suits, costs, expenses or disbursements of any kind or nature whatsoever with
respect
<PAGE>   48
                                                                              43


to the execution, delivery, enforcement, performance and administration of this
Agreement, the other Loan Documents and any such other documents, including,
without limitation, any of the foregoing relating to the violation of,
noncompliance with or liability under, any Environmental Law applicable to the
operations of the Borrower, any of its Subsidiaries or any of the Properties
(all the foregoing in this clause (d), collectively, the "indemnified
liabilities"); provided, that the Borrower shall have no obligation hereunder
to the Agent or any Lender, as the case may be, with respect to indemnified
liabilities arising from (i) the gross negligence or willful misconduct of the
Agent or any such Lender, as the case may be, or (ii) legal proceedings
commenced against the Agent or any such Lender by any security holder or
creditor thereof arising out of and based upon rights afforded any such
security holder or creditor solely in its capacity as such.  The agreements in
this subsection shall survive repayment of the Revolving Credit Loans and all
other amounts payable hereunder.

                 9.6  Successors and Assigns; Participations and Assignments.
(a)  This Agreement shall be binding upon and inure to the benefit of the
Borrower, the Lenders, the Agent and their respective successors and assigns,
except that the Borrower may not assign or transfer any of its rights or
obligations under this Agreement without the prior written consent of each
Lender.

                 (b)  Any Lender may, in the ordinary course of its commercial
banking business and in accordance with applicable law, at any time sell to one
or more banks or other entities approved by the Borrower, which approval shall
not be unreasonably withheld ("Participants") participating interests in any
Revolving Credit Loan owing to such Lender, any Commitment of such Lender or
any other interest of such Lender hereunder and under the other Loan Documents.
In the event of any such sale by a Lender of a participating interest to a
Participant, such Lender's obligations under this Agreement to the other
parties to this Agreement shall remain unchanged, such Lender shall remain
solely responsible for the performance thereof, such Lender shall remain the
holder of any such Revolving Credit Loan for all purposes under this Agreement
and the other Loan Documents, and the Borrower and the Agent shall continue to
deal solely and directly with such Lender in connection with such Lender's
rights and obligations under this Agreement and the other Loan Documents.  The
Borrower agrees that if amounts outstanding under this Agreement are due or
unpaid, or shall have been declared or shall have become due and payable upon
the occurrence of an Event of Default, each Participant shall, to the maximum
extent permitted by applicable law, be deemed to have the right of setoff in
respect of its participating interest in amounts owing under this Agreement to
the same extent as if the amount of its participating interest were owing
directly to it as a Lender under this Agreement; provided that, in purchasing
such participating interest, such Participant shall be deemed to have agreed to
share with the Lenders the proceeds thereof as provided in subsection 9.7(a) as
fully as if it were a Lender hereunder.  The Borrower also agrees that each
Participant shall be entitled to the benefits of subsections 2.15, 2.16 and
2.17 with respect to its participation in the Commitments and the Revolving
Credit Loans outstanding from time to time as if it was a Lender; provided
that, in the case of subsection 2.16, such Participant shall have complied with
the requirements of said subsection; and provided, further, that no Participant
shall be entitled to receive any greater amount pursuant to any such subsection
than the transferor Lender would have been entitled to receive in respect of
the amount of the participation transferred by such transferor Lender to such
Participant had no such transfer occurred.

                 (c)  Any Lender may, in the ordinary course of its commercial
banking business and in accordance with applicable law, at any time and from
time to time assign to any Lender or
<PAGE>   49
                                                                              44


any affiliate thereof or, with the consent of the Borrower and the Agent (which
in each case shall not be unreasonably withheld), to an additional bank or
financial institution ("an Assignee") all or any part of its rights and
obligations under this Agreement and the other Loan Documents pursuant to an
Assignment and Acceptance, substantially in the form of Exhibit F, executed by
such Assignee, such assigning Lender (and, in the case of an Assignee that is
not then a Lender or an affiliate thereof, by the Borrower and the Agent) and
delivered to the Agent for its acceptance and recording in the Register.  Upon
such execution, delivery, acceptance and recording, from and after the
effective date determined pursuant to such Assignment and Acceptance, (x) the
Assignee thereunder shall be a party hereto and, to the extent provided in such
Assignment and Acceptance, have the rights and obligations of a Lender
hereunder with a Commitment as set forth therein, and (y) the assigning Lender
thereunder shall, to the extent provided in such Assignment and Acceptance, be
released from its obligations under this Agreement (and, in the case of an
Assignment and Acceptance covering all or the remaining portion of an assigning
Lender's rights and obligations under this Agreement, such assigning Lender
shall cease to be a party hereto).

                 (d)  The Agent, on behalf of the Borrower, shall maintain at
the address of the Agent referred to in subsection 9.2 a copy of each
Assignment and Acceptance delivered to it and a register (the "Register") for
the recordation of the names and addresses of the Lenders and the Commitment
of, and principal amount of the Revolving Credit Loans owing to, each Lender
from time to time.  The entries in the Register shall be conclusive, in the
absence of manifest error, and the Borrower, the Agent and the Lenders may
(and, in the case of any Revolving Credit Loan or other obligation hereunder
not evidenced by a Note, shall) treat each Person whose name is recorded in the
Register as the owner of a Revolving Credit Loan or other obligation hereunder
as the owner thereof for all purposes of this Agreement and the other Loan
Documents, notwithstanding any notice to the contrary.  Any assignment of any
Revolving Credit Loan or other obligation hereunder not evidenced by a Note
shall be effective only upon appropriate entries with respect thereto being
made in the Register.  The Register shall be available for inspection by the
Borrower or any Lender at any reasonable time and from time to time upon
reasonable prior notice.

                 (e)  Upon its receipt of an Assignment and Acceptance executed
by an assigning Lender and an Assignee (and, in the case of an Assignee that is
not then a Lender or an affiliate thereof, by the Borrower and the Agent),
together with payment by the Assignee to the Agent of a registration and
processing fee of $2500, the Agent shall (i) promptly accept such Assignment
and Acceptance and (ii) on the effective date determined pursuant thereto
record the information contained therein in the Register and give notice of
such acceptance and recordation to the Lenders and the Borrower.

                 (f)  The Borrower authorizes each Lender to disclose to any
Participant or Assignee (each, a "Transferee") and any prospective Transferee
any and all financial information in such Lender's possession concerning the
Borrower and its Affiliates which has been delivered to such Lender by or on
behalf of the Borrower pursuant to this Agreement or which has been delivered
to such Lender by or on behalf of the Borrower in connection with such Lender's
credit evaluation of the Borrower and its Affiliates prior to becoming a party
to this Agreement.

                 (g)      For avoidance of doubt, the parties to this Agreement
acknowledge that the provisions of this subsection concerning assignments of
Revolving Credit Loans and Notes relate only to absolute assignments and that
such provisions do not prohibit assignments creating
<PAGE>   50
                                                                              45


security interests, including, without limitation, any pledge or assignment by
a Lender of any Revolving Credit Loan or Note to any Federal Reserve Bank in
accordance with applicable law.

                 9.7  Adjustments; Set-off.  (a)  If any Lender (a "benefitted
Lender") shall at any time receive any payment of all or part of its Revolving
Credit Loans, or interest thereon, or receive any collateral in respect thereof
(whether voluntarily or involuntarily, by set-off, pursuant to events or
proceedings of the nature referred to in Section 7(f), or otherwise), in a
greater proportion than any such payment to or collateral received by any other
Lender, if any, in respect of such other Lender's Loans, or interest thereon,
such benefitted Lender shall purchase for cash from the other Lenders a
participating interest in such portion of each such other Lender's Loan, or
shall provide such other Lenders with the benefits of any such collateral, or
the proceeds thereof, as shall be necessary to cause such benefitted Lender to
share the excess payment or benefits of such collateral or proceeds ratably
with each of the Lenders; provided, however, that if all or any portion of such
excess payment or benefits is thereafter recovered from such benefitted Lender,
such purchase shall be rescinded, and the purchase price and benefits returned,
to the extent of such recovery, but without interest.

                 (b)  In addition to any rights and remedies of the Lenders
provided by law, each Lender shall have the right, without prior notice to the
Borrower, any such notice being expressly waived by the Borrower to the extent
permitted by applicable law, upon any amount becoming due and payable by the
Borrower hereunder (whether at the stated maturity, by acceleration or
otherwise) to set-off and appropriate and apply against such amount any and all
deposits (general or special, time or demand, provisional or final), in any
currency, and any other credits, indebtedness or claims, in any currency, in
each case whether direct or indirect, absolute or contingent, matured or
unmatured, at any time held or owing by such Lender or any branch or agency
thereof to or for the credit or the account of the Borrower.  Each Lender
agrees promptly to notify the Borrower and the Agent after any such set-off and
application made by such Lender; provided that the failure to give such notice
shall not affect the validity of such set-off and application.

                 9.8  Counterparts.  This Agreement may be executed by one or
more of the parties to this Agreement on any number of separate counterparts
(including by facsimile transmission), and all of said counterparts taken
together shall be deemed to constitute one and the same instrument.  A copy of
this Agreement signed by all the parties shall be lodged with the Borrower and
the Agent.

                 9.9  Severability.  Any provision of this Agreement which is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

                 9.10  Integration.  This Agreement and the other Loan
Documents represent the agreement of the Borrower, the Agent and the Lenders
with respect to the subject matter hereof, and there are no promises,
undertakings, representations or warranties by the Agent or any Lender relative
to the subject matter hereof not expressly set forth or referred to herein or
in the other Loan Documents.
<PAGE>   51
                                                                              46



                 9.11  GOVERNING LAW.  THIS AGREEMENT AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE GOVERNED BY, AND CONSTRUED AND
INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

                 9.12  Submission To Jurisdiction; Waivers.  The Borrower
hereby irrevocably and unconditionally:

                 (a)  submits for itself and its property in any legal action
         or proceeding relating to this Agreement and the other Loan Documents
         to which it is a party, or for recognition and enforcement of any
         judgment in respect thereof, to the non-exclusive general jurisdiction
         of the Courts of the State of New York, the courts of the United
         States of America for the Southern District of New York, and appellate
         courts from any thereof;

                 (b)  consents that any such action or proceeding may be
         brought in such courts and waives any objection that it may now or
         hereafter have to the venue of any such action or proceeding in any
         such court or that such action or proceeding was brought in an
         inconvenient court and agrees not to plead or claim the same;

                 (c)  agrees that service of process in any such action or
         proceeding may be effected by mailing a copy thereof by registered or
         certified mail (or any substantially similar form of mail), postage
         prepaid, to the Borrower at its address set forth in subsection 9.2 or
         at such other address of which the Agent shall have been notified
         pursuant thereto;

                 (d)  agrees that nothing herein shall affect the right to
         effect service of process in any other manner permitted by law or
         shall limit the right to sue in any other jurisdiction; and

                 (e)  waives, to the maximum extent not prohibited by law, any
         right it may have to claim or recover in any legal action or
         proceeding referred to in this subsection any special, exemplary,
         punitive or consequential damages.

                 9.13  Acknowledgements.  The Borrower hereby acknowledges
that:

                 (a)  it has been advised by counsel in the negotiation,
         execution and delivery of this Agreement and the other Loan Documents;

                 (b)  neither the Agent nor any Lender has any fiduciary
         relationship with or duty to the Borrower arising out of or in
         connection with this Agreement or any of the other Loan Documents, and
         the relationship between the Agent and the Lenders, on one hand, and
         the Borrower, on the other hand, in connection herewith or therewith
         is solely that of debtor and creditor; and

                 (c)  no joint venture is created hereby or by the other Loan
         Documents or otherwise exists by virtue of the transactions
         contemplated hereby among the Lenders or among the Borrower and the
         Lenders.

                 9.14  WAIVERS OF JURY TRIAL.  THE BORROWER, THE AGENT
<PAGE>   52
                                                                              47


AND THE LENDERS HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVE TRIAL BY JURY IN
ANY LEGAL ACTION OR PROCEEDING RELATING TO THIS AGREEMENT OR ANY OTHER LOAN
DOCUMENT AND FOR ANY COUNTERCLAIM THEREIN.

                 9.15  Limitation of Interest.  (a)  It is the intent of the
Borrower and the Lenders in the execution and performance of this Agreement and
all matters incidental and related hereto and the other Loan Documents or any
agreement or instrument executed in connection herewith or therewith or with
any Indebtedness of the Borrower to the Lenders to remain in strict compliance
with all laws applicable to the Lenders from time to time in effect, including,
without limitation, usury laws.  In furtherance hereof, the Borrower and the
Lenders stipulate and agree that none of the terms and provisions contained in
or pertaining to this Agreement or in the other Loan Documents or any other
agreement or instrument ("Other Agreement") executed in connection herewith or
with any Indebtedness of the Borrower to the Lenders shall ever be construed to
create a contract to pay for the use, forbearance or detention of money with
interest at a rate or in an amount in excess of the maximum amount of interest
permitted to be charged by the Lenders under all laws in effect and applicable
to the Lenders (the "Maximum Rate").  For purposes of this Agreement and the
Revolving Credit Notes, "interest" shall include the aggregate of all amounts
which constitute or are deemed to constitute interest under the respective laws
in effect and applicable to the Lenders that are contracted for, chargeable,
receivable (whether received or deemed to have been received) or taken under
this Agreement or the Revolving Credit Notes or any Other Agreement.  The
Borrower shall not be required to pay interest hereunder or on any Revolving
Credit Note or any Other Agreement at a rate or in an amount in excess of the
Maximum Rate with respect to the Lenders or the maximum amount of interest that
may be lawfully charged by the Lenders under any law which is in effect and
applicable to the Lenders, and the provisions of this subsection 9.15 shall
control over all other provisions of this Agreement and the Revolving Credit
Notes or any Other Agreement which may be in apparent conflict herewith.  If
the effective rate or amount of interest which would otherwise be payable under
this Agreement or any Revolving Credit Note or any Other Agreement, or all of
them, would exceed the Maximum Rate for the Lenders or the maximum amount of
interest the Lenders or any holder of any Revolving Credit Note or any Other
Agreement is allowed by the relevant applicable law to charge, contract for,
take or receive or in the event the Lenders or any holder of any Revolving
Credit Note or any Other Agreement shall charge, contract for, take or receive
monies that are deemed to constitute interest which could, in the absence of
this provision, increase the effective rate or amount of interest payable under
this Agreement or any Revolving Credit Note or any Other Agreement, or all of
them, to a rate or amount in excess of that permitted to be charged, contracted
for, taken or received under the applicable laws then in effect with respect to
the Lenders, then the principal amount of the Revolving Credit Notes or the
obligations of the Borrower to the Lenders under this Agreement, the Revolving
Credit Notes or any Other Agreement or the amount of interest which would
otherwise be payable to or for the account of the Lenders under this Agreement
or the Revolving Credit Notes or any Other Agreement or all of them, shall be
reduced to the amount allowed under said laws as now or hereafter construed by
the courts having jurisdiction, and all such monies so charged, contracted for,
or received that are deemed to constitute interest in excess of the Maximum
Rate for the Lenders or maximum amount of interest permitted by the relevant
applicable laws shall be immediately returned to or credited to the account of
the Company upon such determination.  In determining whether the interest paid
or payable under any specific contingency exceed the Maximum Rate, the Borrower
and the Lenders shall, to the maximum extent permitted by applicable law, (i)
characterize any non-principal payment as an expense, fee
<PAGE>   53
                                                                              48


(excluding attorneys' and accountants' fees) or premium rather than interest
and (ii) amortize, prorate, allocate and spread, in equal parts during the full
term of the relevant Revolving Credit Note, all interest at any time contracted
for, charged or received in connection with the relevant Revolving Credit Note.

                 (b)   To the extent the Lenders' Maximum Rate is at any time
determined by the laws of the State of Texas (i) such rate shall be the "weekly
ceiling" described in Section 303.201 of the Texas Finance Code, as supplemented
by Article 5069-1D.002 of the Texas Revised Civil Statutes; provided, however,
to the extent permitted by such Article, the Lenders by notice to the Borrower
may revise the aforesaid election of such weekly ceiling as such ceiling affects
the then current or future balances outstanding under the Revolving Credit Notes
and other Loan Documents and Other Agreements.

                 9.16  Existing Agreement.  Notwithstanding anything to the
contrary contained herein, all outstanding loans under the Existing Agreement
shall be deemed to be Revolving Credit Loans under this Agreement with the same
interest periods and Eurodollar Rate and interest with respect thereto (from
the date of the making of such loans except as provided in the next sentence)
and shall be paid under this Agreement on the last day of each current interest
period with respect to such loans.  On the date hereof U.S. Bank National
Association ("USB") shall be deemed to have made a Revolving Credit Loan to the
Borrower to repay the loans of CIBC Inc. under the Existing Agreement and such
Revolving Credit Loan made by USB shall be at the same interest rates and
interest periods with respect to the loans being repaid to CIBC Inc. and on the
last date of such interest periods with respect to such existing loans the
Borrower shall pay to USB interest accruing from the date hereof.  The
Applicable Margin for such existing loans being continued as Revolving Credit
Loans will be as provided in the Existing Agreement until but not including the
date hereof and from and after the date hereof the Applicable Margin for such
loans shall be as provided in this Agreement.
<PAGE>   54
                                                                              49


                 IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed and delivered by their proper and duly authorized
officers as of the day and year first above written.

                                TOM BROWN, INC.


                                By:  /s/ Donald L. Evans                  
                                    -------------------------------------------
                                   Name:  Donald L. Evans
                                   Title: Chairman of the Board of Directors
                                          and Chief Executive Officer


                                THE CHASE MANHATTAN BANK,
                                  as Agent and as a Lender


                                By:  /s/ Peter M. Ling                    
                                    -------------------------------------------
                                   Name:  Peter M. Ling
                                   Title: Vice President



                                NATIONSBANK OF TEXAS, N.A.,
                                  as Co-Agent and as a Lender


                                By:  /s/ Frank K. Stowers                 
                                    -------------------------------------------
                                   Name:  Frank K. Stowers
                                   Title: Vice President



                                U.S. BANK NATIONAL ASSOCIATION,
                                  as a Lender


                                By:  /s/ Charles S. Searle                   
                                    -------------------------------------------
                                   Name:  Charles S. Searle
                                   Title: Senior Vice President
<PAGE>   55


                                   Schedule I


                                  Commitments



<TABLE>
<S>                                                      <C>
The Chase Manhattan Bank                                 $30,000,000
NationsBank of Texas, N.A.                               $22,500,000
U.S. Bank National Association                           $22,500,000
                                                         -----------
                                                         $75,000,000
</TABLE>



                             Addresses for Notices





                 The Chase Manhattan Bank
                 270 Park Avenue, 32nd Floor
                 New York, New York  10017
                 Attention: Oil & Gas Group
                 Fax:  (212) 270-3899

                 NationsBank of Texas, N.A.
                 303 West Wall Street
                 Midland, Texas 79701
                 Attention:  Frank K. Stowers
                 Fax:  (915) 685-2009

                 U.S. Bank National Association
                 918 17th Street
                 CNBB0300
                 Denver, CO  80202
                 Attention:  Charles S. Searle
                 Fax:  (303) 585-4362


<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                           4,200
<SECURITIES>                                         0
<RECEIVABLES>                                   28,116
<ALLOWANCES>                                         0
<INVENTORY>                                        767
<CURRENT-ASSETS>                                33,325
<PP&E>                                         588,688
<DEPRECIATION>                                 170,594
<TOTAL-ASSETS>                                 459,052
<CURRENT-LIABILITIES>                           28,292
<BONDS>                                              0
                                0
                                        100
<COMMON>                                         2,925
<OTHER-SE>                                     371,864
<TOTAL-LIABILITY-AND-EQUITY>                   459,052
<SALES>                                         20,174
<TOTAL-REVENUES>                                32,541
<CGS>                                           17,531
<TOTAL-COSTS>                                   35,136
<OTHER-EXPENSES>                                 3,705
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 783
<INCOME-PRETAX>                                (2,595)
<INCOME-TAX>                                     1,001
<INCOME-CONTINUING>                            (2,032)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (2,032)
<EPS-PRIMARY>                                    (.07)
<EPS-DILUTED>                                    (.07)
        

</TABLE>


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