CROSS TIMBERS OIL CO
8-K, 1998-04-21
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>
 
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549



                                    FORM 8-K

                                 CURRENT REPORT

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



      Date of Report (Date of earliest event reported): FEBRUARY 12, 1998



                           CROSS TIMBERS OIL COMPANY
             (Exact name of registrant as specified in its charter)



         DELAWARE                      1-10662                  75-2347769
(State or other jurisdiction   (Commission File Number)        (IRS Employer
     of incorporation)                                       Identification No.)



           810 HOUSTON STREET, SUITE 2000, FORT WORTH, TEXAS       76102
             (Address of principal executive offices)            (Zip Code)



                                (817) 870-2800
             (Registrant's telephone number, including area code)
<PAGE>
 
ITEM 5. OTHER EVENTS.

     As previously reported in its Form 8-K dated February 25, 1998, Cross
Timbers Oil Company ("the Company") entered into a definitive agreement on
February 12, 1998 with EEX Corporation and EEX Operating L.P. to acquire
producing properties and undeveloped acreage in the East Texas Basin for a
purchase price of $265 million. The acquisition is effective January 1, 1998 and
is anticipated to close on April 24, 1998.  The purchase price is expected to be
reduced to $245 million by estimated net revenues from the effective date
through the closing date.  The acquisition is subject to third party consents
and other typical purchase price adjustments, and will be funded by borrowings
available under the Company's Revolving Credit Agreement with commercial banks
dated April 17, 1998. Such borrowings may be partially reduced by net proceeds
from a public offering of the Company's common stock.

     The Company's internal engineers estimate that proved reserves attributable
to this acquisition at the closing date will be 250 billion cubic feet of
natural gas and 1.6 million barrels of oil, concentrated in approximately 88,000
gross (59,000 net) acres.  Current net daily production is approximately 80
million cubic feet equivalent from about 900 (664 net) wells with a reserve-to-
production index of almost nine years.  The Company will operate more than 97%
of the value of the properties.  The acquisition also includes more than 12,800
net undeveloped acres located primarily in Anderson County, Texas.
 
 
ITEM 7.    FINANCIAL STATEMENTS AND EXHIBITS.                              PAGE
                                                                           ----
  (a) Financial statements of businesses acquired.
 
      EEX Acquisition:
 
         Report of Independent Public Accountants ........................   4
 
         Statements of Revenues and Direct Operating Expenses 
           for the Years Ended December 31, 1997 and 1996 ................   5
 
         Notes to Statements of Revenues and Direct Operating Expenses ...  6-7

  (b) Pro forma financial information.
 
      Cross Timbers Oil Company:
 
         Pro Forma Consolidated Financial Statements (Unaudited) .........   8
 
         Pro Forma Consolidated Balance Sheet at December 31, 1997 .......   9
 
         Pro Forma Consolidated Statement of Operations
           for the Year Ended December 31, 1997 ..........................  10
 
         Notes to Pro Forma Consolidated Financial Statements............. 11-13

                                      -2-
<PAGE>
 
  (c)  Exhibits.

       Exhibit Number
       and Description
       ---------------

         (2) Plan of acquisition, reorganization, arrangement, liquidation or
             succession

             2.1  Purchase and Sale Agreement between EEX Operating L.P. and EEX
                  Corporation as Seller and Cross Timbers Oil Company as Buyer,
                  dated February 12, 1998

             2.2  Letter Amendment dated March 20, 1998 to Purchase and Sale
                  Agreement dated February 12, 1998, between EEX Operating L.P.,
                  et al and Cross Timbers Oil Company

        (99) Additional Exhibits

             99.1 Revolving Credit Agreement, dated April 17, 1998, among the
                  Company and certain commercial banks named therein

                                      -3-
<PAGE>
 
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS



Cross Timbers Oil Company:

We have audited the accompanying statements of revenues and direct operating
expenses of the EEX Acquisition (see Note 1) for the years ended December 31,
1997 and 1996.  These financial statements are the responsibility of the
management of Cross Timbers Oil Company.  Our responsibility is to express an
opinion on these financial statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the statements.  An audit also includes assessing
the accounting principles used and significant estimates made by management, as
well as evaluating the overall financial statement presentation.  We believe
that our audits provide a reasonable basis for our opinion.

In our opinion, such statements present fairly, in all material respects, the
revenues and direct operating expenses of the EEX Acquisition described in Note
1 for the years ended December 31, 1997 and 1996 in conformity with generally
accepted accounting principles.



ARTHUR ANDERSEN LLP

Fort Worth, Texas
April 17, 1998

                                      -4-
<PAGE>
 
                                EEX ACQUISITION
              STATEMENTS OF REVENUES AND DIRECT OPERATING EXPENSES
                 FOR THE YEARS ENDED DECEMBER 31, 1997 AND 1996

                                 (in thousands)
<TABLE>
<CAPTION>
 
 
                                       1997       1996
                                     -------     -------
                                        (Unaudited)
<S>                                  <C>         <C>
REVENUES
 
 Oil...............................  $ 5,298     $ 5,734
 Gas...............................   88,747      92,532
                                     -------     -------
   Total...........................   94,045      98,266
                                     -------     -------
 
DIRECT OPERATING EXPENSES
 
 Production........................    6,933       8,055
 Taxes on production and property..   10,109      10,155
                                     -------     -------
   Total...........................   17,042      18,210
                                     -------     -------
 
EXCESS OF REVENUES OVER
 DIRECT OPERATING EXPENSES.........  $77,003     $80,056
                                     =======     =======
 
</TABLE>



See Accompanying Notes to Statements of Revenues and Direct Operating Expenses.

                                      -5-
<PAGE>
 
                                EEX ACQUISITION
         NOTES TO STATEMENTS OF REVENUES AND DIRECT OPERATING EXPENSES

1.    BASIS OF PRESENTATION

     On February 12, 1998, Cross Timbers Oil Company ("the Company") entered
into an agreement to acquire primarily gas-producing properties in the East
Texas Basin from EEX Corporation and EEX Operating L.P. ("EEX Acquisition") for
a stated purchase price of $265 million.  The Company deposited $26.5 million
toward the purchase price and expects the transaction to close on April 24,
1998.  After adjustments for other acquisition costs, estimated cash flows from
the effective date of January 1, 1998 and customary post-closing adjustments,
the Company estimates the ultimate purchase price will be reduced to $245
million.  The acquisition will be funded by borrowings available under the
Company's Revolving Credit Agreement with commercial banks dated April 17, 1998.
Such borrowings may be partially reduced by net proceeds from a public offering
of the Company's common stock.

     The accompanying statements of revenues and direct operating expenses do
not include general and administrative expense, interest income or expense, a
provision for depreciation, depletion and amortization or any provision for
income taxes because the property interests acquired represent only a portion of
a business and the costs incurred by EEX Corporation and EEX Operating L.P. are
not necessarily indicative of the costs to be incurred by the Company.

     Historical financial information reflecting financial position, results of
operations and cash flows of the EEX Acquisition are not presented because the
entire acquisition cost was assigned to the oil and gas property interests.
Accordingly, the historical statements of revenues and direct operating expenses
have been presented in lieu of the financial statements required under Rule 3-05
of Securities and Exchange Commission Regulation S-X.


2.    SUPPLEMENTAL OIL AND GAS RESERVE INFORMATION (UNAUDITED)

Estimated Quantities of Proved Oil and Gas Reserves

     The proved reserve information presented below has been estimated by the
Company's internal engineers, and reviewed by independent petroleum engineers,
using December 31, 1997 prices and costs.  Proved reserves are estimated
quantities of crude oil and natural gas which, based on geologic and engineering
data, are estimated to be reasonably recoverable in future years from known
reservoirs under existing economic and operating conditions. Proved developed
reserves are those which are expected to be recovered through existing wells
with existing equipment and operating methods.  Because of inherent
uncertainties and the limited nature of reservoir data, such estimates are
subject to change as additional information becomes available.
 
     Proved Oil and Gas Reserves at December 31, 1997
                                               Oil (Bbls)     Gas (Mcf)
                                               ----------   -------------
                                                   (in thousands)

     Proved reserves ..........................   1,599      260,000
                                                  =====      =======

     Proved developed reserves ................   1,365      217,764
                                                  =====      =======

                                      -6-
<PAGE>
 
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil
and Gas Reserves

     The standardized measure of discounted future net cash flows ("Standardized
Measure") is prepared using assumptions required by the Financial Accounting
Standards Board.  Such assumptions include the use of year-end prices for oil
and gas and year-end costs for estimated future development and production
expenditures to produce year-end estimated proved reserves.  Discounted future
net cash flows are calculated using a 10% rate.

     The Standardized Measure does not represent the Company's estimate of
future net cash flows or the value of proved oil and gas reserves.  Probable and
possible reserves, which may become proved in the future, are excluded from the
calculations.  Furthermore, year-end prices, used to determine the standardized
measure of discounted cash flows, are influenced by seasonal demand and other
factors and may not be the most representative in estimating future revenues or
reserve data.

     Standardized Measure of Discounted Future Net Cash Flows at December 31,
1997
<TABLE>
<CAPTION>
   
                                              (in thousands)
<S>                                              <C>
 
Future cash inflows........................      $ 658,436
Future costs:
 Production................................       (203,110)
 Development...............................        (36,754)
                                                 ---------
Future net cash inflows....................        418,572
10% annual discount........................       (171,173)
                                                 ---------
 
Standardized measure of discounted future
  net cash flows before income taxes.......      $ 247,399
                                                 =========
</TABLE>

                                      -7-
<PAGE>
 
                           CROSS TIMBERS OIL COMPANY
            PRO FORMA CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

   The accompanying Pro Forma Consolidated Financial Statements have been
prepared by recording pro forma adjustments to the historical consolidated
financial statements of Cross Timbers Oil Company ("the Company"). The Pro Forma
Consolidated Balance Sheet as of December 31, 1997 has been prepared as if the
EEX Acquisition (as described in Note 2) was consummated on December 31, 1997.
The Pro Forma Consolidated Statement of Operations for the year ended December
31, 1997 has been prepared as if the EEX Acquisition and the 1997 Acquisitions
(as described in Note 2) were consummated on January 1, 1997.

   The Pro Forma Consolidated Financial Statements are not necessarily
indicative of the financial position or results of operations that would have
occurred had the transactions been effected on the assumed dates. Additionally,
future results may vary significantly from the results reflected in the Pro
Forma Consolidated Statement of Operations due to normal production declines,
changes in prices, future transactions and other factors.  These statements
should be read in conjunction with the Company's audited consolidated financial
statements and the related notes for the year ended December 31, 1997 included
in the Company's 1997 Form 10-K and the statements of revenues and direct
operating expenses of the EEX Acquisition for the year ended December 31, 1997.

                                      -8-
<PAGE>
 
                                 CROSS TIMBERS OIL COMPANY

                     PRO FORMA CONSOLIDATED BALANCE SHEET (UNAUDITED)
                              DECEMBER 31, 1997
<TABLE>
<CAPTION>

 
                                                                                 Pro Forma
                                                                                 Adjustments
                                                                                  (Note 3)
                                                                                --------------
                                                                                    EEX                    Pro
                                                                   Historical   Acquisition(a)            Forma
                                                                   ----------   --------------            -----
<S>                                                            <C>              <C>                  <C>
ASSETS                                                                          (in thousands)
 
Current Assets:                                                   
 Cash and cash equivalents...................................       $   3,816        $       -       $     3,816
 Accounts receivable, net....................................          43,996                -            43,996
 Other current assets........................................           4,350                -             4,350
                                                                    ---------         --------        ----------
  Total Current Assets.......................................          52,162                -            52,162
                                                                    ---------         --------        ----------
                                                                                                    
Property and Equipment, at cost - successful efforts method..         961,368          245,000         1,206,368
 Accumulated depreciation, depletion and amortization........        (237,532)               -          (237,532)
                                                                    ---------         --------        ----------
  Net Property and Equipment.................................         723,836          245,000           968,836
                                                                    ---------         --------        ----------
                                                                                                    
Other Assets.................................................          12,457                -            12,457
                                                                    ---------         --------        ----------
                                                                                                    
TOTAL ASSETS.................................................       $ 788,455         $245,000        $1,033,455
                                                                    =========         ========        ==========
                                                                                                    
LIABILITIES AND STOCKHOLDERS' EQUITY                                                               
                                                                                                   
Current Liabilities:                                                                               
 Accounts payable and accrued liabilities....................       $  54,339        $      -         $   54,339
 Accrued stock incentive compensation........................             554               -                554
                                                                    ---------        --------         ----------
  Total Current Liabilities..................................          54,893               -             54,893
                                                                    ---------        --------         ----------
                                                                                                    
Long-term Debt...............................................         539,000         245,000            784,000
                                                                    ---------         -------         ----------
                                                                                                    
Deferred Income Taxes Payable................................          21,320               -             21,320
                                                                    ---------         -------         ----------
                                                                                                    
Other Long-term Liabilities..................................           2,999               -              2,999
                                                                    ---------         -------         ----------
                                                                                                     
Stockholders' Equity:                                                                              
 Series A convertible preferred stock ($.01 par value,                                             
   1,138,729 shares issued, at liquidation value of $25).....          28,468                -            28,468
 Common stock ($.01 par value, 46,310,710 shares issued).....             463                -               463
 Additional paid-in capital..................................         210,954                -           210,954
 Treasury stock (6,860,779 shares)...........................         (76,656)               -           (76,656)
 Retained earnings...........................................           7,014                -             7,014
                                                                    ---------         --------        ----------
  Total Stockholders' Equity.................................         170,243                -           170,243
                                                                    ---------         --------        ----------
                                                                                                    
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY...................       $ 788,455         $245,000        $1,033,455
                                                                    =========         ========        ==========
                                                                                                    
</TABLE>
    See Accompanying Notes to Pro Forma Consolidated Financial Statements.

                                      -9-
<PAGE>
 
                           CROSS TIMBERS OIL COMPANY
          PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS (UNAUDITED)
                     FOR THE YEAR ENDED DECEMBER 31, 1997
<TABLE>
<CAPTION>
                                                     Pro Forma Adjustments (Note 3)
                                                    ---------------------------------
                                                        EEX           1997
                                                    Acquisition   Acquisitions
                                     Historical         (b)            (c)      Other          Pro Forma
                                     ----------     -----------   ------------  -----          ---------
REVENUES                        (in thousands, except per share amounts)               
<S>                                   <C>            <C>            <C>        <C>             <C> 
 
 Oil and condensate...........        $ 75,223       $ 5,298        $ 1,623    $      -         $ 82,144
 Gas and natural gas liquids..         110,104        88,747         35,220           -          234,071
 Gas gathering, processing       
    and marketing.............           9,851             -              -           -            9,851
 Other........................           5,494             -              -           -            5,494
                                      --------       -------   ------------  ----------         --------
   Total Revenues.............         200,672        94,045         36,843           -          331,560
                                      --------       -------   ------------  ----------         --------
 
EXPENSES
 
 Production...................          43,580         6,933          5,049       6,718 (d)       62,280
 Exploration..................           2,088             -              -           -            2,088
 Taxes on production and         
  property....................          16,405        10,109          3,574           -           30,088
 Depreciation, depletion         
    and amortization..........          47,721             -              -      45,610 (e)       93,331
 General and administrative...          15,818             -              -      (4,737)(d)       11,081
 Gas gathering and processing.           8,517             -              -           -            8,517
 Interest, net................          26,677             -              -      28,628 (f)       55,305
 Trust development costs......             665             -              -           -              665
                                      --------       -------   ------------  ----------         --------
   Total Expenses.............         161,471        17,042          8,623      76,219          263,355
                                      --------       -------   ------------  ----------         --------
                                 
INCOME BEFORE INCOME TAX......          39,201        77,003         28,220     (76,219)          68,205
                                 
Income Tax Expense............          13,517             -              -       9,861 (g)       23,378
                                      --------       -------   ------------  ----------         --------
                                 
NET INCOME....................          25,684        77,003         28,220     (86,080)          44,827
                                 
Preferred Stock Dividends.....           1,779             -              -           -            1,779
                                      --------       -------   ------------  ----------         --------
                                 
EARNINGS AVAILABLE TO            
 COMMON STOCK.................        $ 23,905       $77,003        $28,220    $(86,080)         $43,048
                                      ========       =======   ============  ==========          =======
                                 
EARNINGS PER COMMON SHARE        
 Basic........................           $0.60                                                     $1.08
                                      ========                                                   =======
 Diluted......................           $0.59                                                     $1.05
                                      ========                                                   =======
                                 
Weighted Average                 
 Common Shares Outstanding....          39,773                                                    39,773
                                      ========                                                   =======
 
</TABLE>



    See Accompanying Notes to Pro Forma Consolidated Financial Statements.

                                      -10-
<PAGE>
 
                           CROSS TIMBERS OIL COMPANY
        NOTES TO PRO FORMA CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

1.    BASIS OF PRESENTATION

     The accompanying Pro Forma Consolidated Balance Sheet at December 31, 1997
has been prepared assuming Cross Timbers Oil Company ("the Company") consummated
the EEX Acquisition (Note 2) on December 31, 1997.  The accompanying Pro Forma
Consolidated Statement of Operations for the year ended December 31, 1997 has
been prepared assuming that the Company consummated the EEX Acquisition and the
1997 Acquisitions (Note 2) on January 1, 1997.  The Pro Forma Consolidated
Statement of Operations is not necessarily indicative of the results of
operations had the above described transactions occurred on the assumed dates.


2.    ACQUISITIONS

EEX Acquisition

     On February 12, 1998, Cross Timbers Oil Company ("the Company") entered
into an agreement to acquire primarily gas-producing properties in the East
Texas Basin from EEX Corporation and EEX Operating L.P. ("EEX Acquisition") for
a stated purchase price of $265 million.  The Company deposited $26.5 million
toward the purchase price and expects the transaction to close on April 24,
1998.  After adjustments for other acquisition costs, estimated cash flows from
the effective date of January 1, 1998 and customary post-closing adjustments,
the Company estimates the ultimate purchase price will be reduced to $245
million.  The acquisition will be funded by borrowings available under the
Company's Revolving Credit Agreement with commercial banks dated April 17, 1998.
Such borrowings may be partially reduced by net proceeds from a public offering
of the Company's common stock.

1997 Acquisitions

     The acquisitions described in the following three paragraphs are
collectively referred to as the "1997 Acquisitions."

     On December 1, 1997, the Company acquired interests in certain producing
oil and gas properties in the San Juan Basin of New Mexico from a subsidiary of
Amoco Corporation ("Amoco") at an estimated purchase price of $195 million,
including $5.7 million value for warrants issued to Amoco to purchase 937,500
shares of the Company's common stock at price of $15.31 per share for a period
of five years.  Amoco elected to accept certain producing properties owned by
the Company valued at $15.7 million in lieu of cash, reducing cash consideration
to $173.6 million, which was primarily funded with bank debt.

     On May 14, 1997, the Company acquired primarily gas-producing properties in
Oklahoma, Kansas and Texas for an estimated adjusted purchase price of $39
million from a subsidiary of Burlington Resources Inc.  The properties are
primarily operated interests.  The Company funded the acquisition with bank debt
and cash flow from operations.

     From January through May 1997, the Company purchased an additional 370,500
units of beneficial interest, or 6%, of the outstanding units of beneficial
interest in the Cross Timbers Royalty Trust at a cost of $5.4 million, funded
primarily with bank debt.

                                      -11-
<PAGE>
 
3.    PRO FORMA ADJUSTMENTS

     Pro forma adjustments necessary to adjust the Consolidated Balance Sheet
and Statement of Operations are as follows:

     (a) To record the EEX Acquisition.

     (b) To record revenue and direct operating expenses of the EEX Acquisition.

     (c) To record revenue and direct operating expenses of the 1997
          Acquisitions.

     (d) To record the estimated increase in general and administrative expense
         ($2,735,000) and an allocation from general and administrative expense
         to production expense ($7,472,000, less billing to joint owners of
         $754,000) attributable to the EEX Acquisition and the 1997
         Acquisitions.

     (e) To record estimated depreciation and depletion expense attributable to
         the EEX Acquisition and the 1997 Acquisitions using the unit-of-
         production method applied to the cost of the properties acquired.

     (f) To record estimated interest expense attributable to the increase in
         long-term debt to finance the purchase of the EEX Acquisition and the
         1997 Acquisitions. Interest expense was determined using the weighted
         average interest rate incurred by the Company under its revolving
         credit facilities, assuming the entire cost of the acquisitions had
         been funded with bank borrowings at January 1, 1997.

     (g) To record federal income tax at a corporate statutory rate of 34%
         related to net pro forma adjustments.


4.    PRO FORMA SUPPLEMENTAL OIL AND GAS RESERVE INFORMATION

Estimated Quantities of Pro Forma Proved Oil and Gas Reserves

     Pro forma reserve estimates at December 31, 1997 are based on reports
prepared by independent petroleum engineers for proved reserves of the Company
and reports prepared by the Company's internal engineers and reviewed by
independent engineers for proved reserves of the EEX Acquisition.

     Proved reserves are estimated quantities of crude oil and natural gas
which, based on geologic and engineering data, are estimated to be reasonably
recoverable in future years from known reservoirs under existing economic and
operating conditions.  Proved developed reserves are those which are expected to
be recovered through existing wells with existing equipment and operating
methods.  Because of inherent uncertainties and the limited nature of reservoir
data, such estimates are subject to change as additional information becomes
available.
<TABLE>
<CAPTION>
 
     Pro Forma Proved Oil and Gas Reserves at December 31, 1997
                                                                               Natural Gas
                                      Oil (Bbls)         Gas (Mcf)            Liquids (Bbls)
                                      ----------        -----------           --------------
                                                       (in thousands)
<S>                                    <C>               <C>                      <C> 
Proved reserves............             49,453           1,075,775                 13,810
                                        ======           =========                 ======
 
Proved developed reserves..             35,200             895,474                 11,494
                                        ======           =========                 ======
</TABLE>

                                      -12-
<PAGE>
 
Standardized Measure of Discounted Future Net Cash Flows Relating to Pro Forma
Proved Oil and Gas Reserves

     The standardized measure of discounted future net cash flows ("Standardized
Measure") is prepared using assumptions required by the Financial Accounting
Standards Board.  Such assumptions include the use of year-end prices for oil
and gas and year-end costs for estimated future development and production
expenditures to produce year-end estimated proved reserves.  Discounted future
net cash flows are calculated using a 10% rate.

     The Standardized Measure does not represent the Company's estimate of
future net cash flows or the value of proved oil and gas reserves.  Probable and
possible reserves, which may become proved in the future, are excluded from the
calculations.  Furthermore, year-end prices, used to determine the standardized
measure of discounted cash flows, are influenced by seasonal demand and other
factors and may not be the most representative in estimating future revenues or
reserve data.

     Pro Forma Standardized Measure of Discounted Future Net Cash Flows at
December 31, 1997
<TABLE>
<CAPTION>
                                                              (in thousands)
<S>                                                             <C>
Future cash inflows.........................................    $ 3,262,889
Future costs:
 Production.................................................     (1,182,427)
 Development................................................       (177,348)
                                                                -----------
Future net cash inflows before income tax...................      1,903,114
Future income tax...........................................       (350,389)
                                                                -----------
Future net cash flows.......................................      1,552,725
10% annual discount.........................................       (696,902)
                                                                -----------
 
  Standardized measure of discounted future net cash flows      $   855,823
                                                                ===========
</TABLE>

                                      -13-
<PAGE>
 
                                   SIGNATURES


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

 
                                    CROSS TIMBERS OIL COMPANY


Date: April 20, 1998                By: BENNIE G. KNIFFEN
                                        ------------------------------------
                                        Bennie G. Kniffen
                                        Senior Vice President and Controller

                                      -14-

<PAGE>
 
                                                               EXHIBIT 2.1








                           PURCHASE AND SALE AGREEMENT


                                     BETWEEN


                               EEX OPERATING L.P.

                                       AND

                                 EEX CORPORATION


                                    AS SELLER


                                       AND

                            CROSS TIMBERS OIL COMPANY

                                    AS BUYER


                                      DATED


                                FEBRUARY 12, 1998
<PAGE>
 
                                TABLE OF CONTENTS

<TABLE>


<S>     <C>                                                                                                   <C>   
1.     Assets to be Sold and Purchased..................................................................       1
       -------------------------------
2.     Purchase Price...................................................................................       2
       --------------
3.     Representations of Seller........................................................................       2
       -------------------------
4.     Representations of Buyer.........................................................................       3
       ------------------------
5.     Certain Covenants of Seller Pending Closing......................................................       4
       -------------------------------------------
6.     Due Diligence Reviews............................................................................       5
       ---------------------
7.     Certain Purchase Price Adjustments...............................................................       9
       ----------------------------------
8.     Certain Covenants of Buyer Pending Closing.......................................................      10
       ------------------------------------------
9.     Conditions Precedent to the Obligations of Buyer.................................................      10
       ------------------------------------------------
10.    Conditions Precedent to the Obligations of Seller................................................      11
       -------------------------------------------------
11.    Termination of Agreement.........................................................................      11
       ------------------------
12.    The Closing......................................................................................      12
       -----------
13.    Certain Accounting Adjustments...................................................................      13
       ------------------------------
14.    Assumption and Indemnification...................................................................      14
       ------------------------------
15.    Disclaimer of Warranties.........................................................................      15
       ------------------------
16.    Commissions......................................................................................      15
       -----------
17.    Casualty Loss....................................................................................      16
       -------------
18.    Notices..........................................................................................      16
       -------
19.    Survival of Provisions...........................................................................      16
       ----------------------
20.    Operations.......................................................................................      17
       ----------
21.    Miscellaneous Matters............................................................................      17
       ---------------------

</TABLE>
<PAGE>
 
                           PURCHASE AND SALE AGREEMENT
                           ---------------------------


         This Purchase and Sale Agreement  ("Agreement") is entered into this 12
day of February,  1998, by and between EEX CORPORATION ("EEX") and EEX OPERATING
L.P. ("EOP") (collectively  "Seller"),  whose mailing address is 4849 Greenville
Avenue, Suite 1200, Dallas, Texas 75206 and CROSS TIMBERS OIL COMPANY ("Buyer"),
whose  mailing  address is 810  Houston,  Ste 2000,  Fort  Worth,  TX 76102.  In
consideration of the mutual covenants and conditions contained in this Agreement
and other good and valuable consideration, the adequacy and sufficiency of which
are hereby acknowledged, the parties agree as follows:

                              W I T N E S S E T H:

         1.  ASSETS TO BE SOLD AND  PURCHASED.  Seller  agrees to sell and Buyer
             --------------------------------
agrees to purchase, for the consideration  hereinafter set forth, and subject to
the terms and provisions herein contained,  the following described  properties,
rights and interests:

                  (a) All of Seller's  right,  title and  interest in and to the
         oil, gas and/or mineral leases described in Exhibit "A", Exhibit "A-1",
         and  Exhibit  "A-2"  (collectively  called  "Exhibit  A")  hereto,  any
         ratifications  and/or  amendments  to such leases  (whether or not such
         ratifications or amendments are described in Exhibit A), subject to the
         exceptions and reservations contained in Exhibit A; and

                  (b)  Without  limitation  of the  foregoing,  all of  Seller's
         right, title and interest (of whatever kind or character, whether legal
         or equitable,  and whether vested or contingent) in and to the oil, gas
         and other  minerals in and under or that may be produced from the lands
         or leases described in Exhibit A hereto, including, without limitation,
         interests in all oil, gas and/or  mineral  leases  covering such lands,
         overriding  royalties,  production  payments and net profits interests,
         fee mineral interests, fee royalty interests and all other interests in
         such oil, gas and other minerals, even though Seller's interest in such
         oil, gas and other minerals may be incorrectly described in, or omitted
         from,  such Exhibit A, but subject in each case to the  exceptions  and
         reservations contained in such Exhibit A; and

                  (c)  All  of  Seller's  rights,  titles  and  interests in and
         to, or otherwise  derived from,  all presently  existing and valid oil,
         gas  and/or  mineral  unitization,   pooling,   and/or  communitization
         agreements,  declarations  and/or  orders and in and to the  properties
         covered and the units created thereby  (including,  without limitation,
         all units formed under orders,  rules,  regulations,  or other official
         acts of any federal, state, or other authority having jurisdiction, and
         voluntary  unitization  agreements,  designations and/or  declarations)
         relating to the properties  described in subsections (a) and (b) above;
         and

                  (d) All of Seller's rights, titles and interests in and to all
         presently existing and valid rights-of-way and easements, production
         sales contracts, operating agreements, unit agreements, and other
         agreements and contracts which relate to any of the properties
         described in subsections (a), (b) and (c) above; provided that Seller
         will retain all obligations and liabilities under any agreements
         entered into with ENCOGEN ONE PARTNERS, LTD, and Seller will indemnify
         and hold Buyer (and the said properties) harmless from any claims,
         liability or obligations related to the said agreements with ENCOGEN;
         and

                  (e) All of Seller's rights, titles and interests in and to all
         materials,  supplies,  machinery,  equipment,  improvements  and  other
         personal  property  and  fixtures   (including,   but  not  by  way  of
         limitation,  all wells, wellhead equipment,  pumping units,  flowlines,
         tanks, buildings, injection facilities,  saltwater disposal facilities,
         compression facilities, gathering
<PAGE>
 
         
         systems, and other equipment) located on the properties described in
         subsections (a), (b) and (c) above or on the lands identified on
         Exhibit "E" attached hereto being the Field Offices of Seller (which
         lands, to the extent of the Fee or leasehold interest of Seller, are
         included in the properties conveyed) and used in connection with the
         exploration, development, operation or maintenance thereof; and

                  (f) All of Seller's lease files, abstracts and title opinions,
         production records,  well files,  accounting records (but not including
         general financial accounting or tax accounting records), electric logs,
         geological  data  and  records  (subject  to any  contractual  or other
         restrictions  relating to the transfer of such data and  records),  and
         other  files,  documents  and  records  which  directly  relate  to the
         properties described above, but nothing contained herein shall preclude
         Seller from retaining copies of the same.

The interests of the Seller in the  properties  and  interests  specified in the
foregoing subsections (a), (b) and (c) are herein sometimes  collectively called
the "Oil and Gas  Properties," and the interests of the Seller in the properties
and interests specified in the foregoing subsections (a), (b), (c), (d), (e) and
(f) are herein sometimes collectively called the "Assets".

         2.  PURCHASE  PRICE.  The  purchase  price for the Assets  shall be Two
             ---------------
hundred and sixty-five million  ($265,000,000) (herein called the "Base Purchase
Price").  Such Base Purchase  Price may be adjusted as provided  herein  (herein
called the Base Purchase Price, as so adjusted, and as the same may otherwise be
adjusted by mutual  agreement of the parties,  being herein called the "Purchase
Price").  The Purchase Price shall be paid in cash at the Closing as hereinafter
provided.  Buyer has previously paid to Seller the sum of  $26,500,000.00  which
shall  hereinafter  be  referred  to as  the  "Deposit".  If  Buyer  and  Seller
consummate the transaction  contemplated by this Agreement, the Deposit shall be
applied  to the  Purchase  Price.  If Buyer  and  Seller do not  consummate  the
transaction  contemplated by this Agreement  because of a refusal by Seller,  in
the  absence of a default by Buyer,  Seller  shall  return the Deposit to Buyer.
Except as  provided  in the  preceding  sentences,  if Buyer fails or refuses to
consummate the transaction contemplated by this Agreement, or if the transaction
contemplated  by this  Agreement  otherwise  fails to close on the Closing Date,
Seller shall retain the Deposit as  liquidated  damages.  The parties agree that
damages in such an event would be  extremely  difficult to  determine,  that the
Deposit  represents a fair and  reasonable  estimate of such  damages  under the
circumstances,  and that such a retention of the Deposit  does not  constitute a
penalty.

         3. REPRESENTATIONS OF SELLER. Seller represents to Buyer that:
            -------------------------

                  (a) EEX is a corporation and EOP is a limited partnership both
         duly  organized,  and legally  existing  under the laws of the State of
         Texas.  Seller is qualified  to do business and is in good  standing in
         each state in which the Assets are located where the laws of such state
         require a  corporation  and a limited  partnership  owning  the  Assets
         located in such state to qualify to do business.

                  (b)  Seller  has  full  power to enter  into and  perform  its
         obligations  under this  Agreement  and has taken all proper  action to
         authorize   entering  into  this  Agreement  and   performance  of  its
         obligations  hereunder,  upon  obtaining  Board  approval  pursuant  to
         Section 10(c) below.

                  (c)  Other  than   requirements  (if  any)  that  consents  to
         assignment,  or waivers of preferential rights to purchase, be obtained
         from third  parties,  and except for approvals  ("Routine  Governmental
         Approvals") required to be obtained from governmental  entities who are
         lessors under leases forming a part of the Oil and Gas  Properties,  or
         who administer such leases on

                                       2
<PAGE>
 
         behalf of such lessors, which are customarily obtained post-closing, or
         as otherwise  set forth on Schedule  3(c),  neither the  execution  and
         delivery of this Agreement,  nor the  consummation of the  transactions
         contemplated  hereby,  nor the compliance  with the terms hereof,  will
         result in any default under any agreement or instrument to which Seller
         is a party or by which the  Assets are  bound,  or  violate  any order,
         writ,  injunction,  decree,  statute,  rule or regulation applicable to
         Seller or to the Assets.

                  (d) This Agreement and the  Conveyance  provided for herein to
         be delivered at Closing will,  when executed and delivered,  constitute
         the legal,  valid and  binding  obligation  of Seller,  enforceable  in
         accordance  with its terms,  except as limited by  bankruptcy  or other
         laws  applicable  generally  to  creditor's  rights  and as  limited by
         general equitable principles.

                  (e)  Except  as  set  forth  on Schedule  3(e)  hereto,  there
         are no pending suits,  actions, or other proceedings in which Seller is
         a party which affect the Assets  (including,  without  limitation,  any
         actions  challenging  or  pertaining  to  Seller's  title to any of the
         Assets),  or affecting the execution and delivery of this  Agreement or
         the consummation of the transactions contemplated hereby.

         4. REPRESENTATIONS OF BUYER. Buyer represents to Seller that:
            ------------------------
                  (a) Buyer is a corporation duly organized and legally existing
         under  the  laws of the  State  of  Delaware,  and is  qualified  to do
         business  and is in good  standing  in each of the  states in which the
         Assets  are  located  where  the laws of such  state  would  require  a
         corporation  owning the  Assets  located in such state to qualify to do
         business.

                  (b)  Buyer  has  full  power to enter  into  and  perform  its
         obligations  under this  Agreement  and has taken all proper  action to
         authorize   entering  into  this  Agreement  and   performance  of  its
         obligations  hereunder,  upon  obtaining  Board  approval  pursuant  to
         Section 9(c) below.

                  (c) Neither the execution and delivery of this Agreement,  nor
         the  consummation  of the  transactions  contemplated  hereby,  nor the
         compliance with the terms hereof,  will result in any default under any
         agreement  or  instrument  to which  Buyer  is a party or by which  the
         Assets are bound,  or violate  any  order,  writ,  injunction,  decree,
         statute, rule or regulation applicable to Buyer or to the Assets.

                  (d) This Agreement and the  Conveyance  provided for herein to
         be delivered at Closing will,  when executed and delivered,  constitute
         the  legal,  valid and  binding  obligation  of Buyer,  enforceable  in
         accordance  with its terms,  except as limited by  bankruptcy  or other
         laws  applicable  generally  to  creditor's  rights  and as  limited by
         general equitable principles.

                  (e) There are no pending suits,  actions, or other proceedings
         in which Buyer is a party which  affect the  execution  and delivery of
         this Agreement or the  consummation  of the  transactions  contemplated
         hereby.

                  (f) Buyer is a knowledgeable purchaser,  owner and operator of
         oil and  gas  properties,  has  the  ability  to  evaluate  oil and gas
         properties,  and in fact has evaluated the Assets for purchase,  and is
         acquiring  the Assets  based upon its own  evaluation,  and for its own
         account  and not with the  intent  to make a  distribution  within  the
         meaning of the Securities Act of 1933

                                       3
<PAGE>
 
         (and the rules and  regulations  pertaining  thereto) or a distribution
         thereof in violation of any other applicable securities laws.

                  (g) With regard to those  Assets which Buyer seeks to operate,
         Buyer is qualified to operate  such Assets under the  applicable  laws,
         rules and  regulations  of the  jurisdiction  in which such  Assets are
         located, or will become so qualified before operating such Assets.

         5. CERTAIN  COVENANTS OF SELLER  PENDING  CLOSING.  Between the date of
            ----------------------------------------------
this Agreement and the Closing Date:

                  (a)  Seller  will  give  Buyer  and its  attorneys  and  other
         representatives  access at all  reasonable  times to the Assets and, at
         Seller's office, to Seller's records  (including,  without  limitation,
         title files,  division  order files,  well files,  production  records,
         accounting  records,   marketing  files,  equipment  inventories,   and
         production,  severance  and ad valorem tax records)  pertaining  to the
         ownership and/or operation of the Assets. Seller shall not be obligated
         to provide  Buyer  with  access to any  records  or data  which  Seller
         considers  to be  proprietary  or  confidential  to it or which  Seller
         cannot legally provide to Buyer without, in its opinion,  breaching, or
         risking a breach of,  confidentiality  agreements  with other  parties.
         Buyer  recognizes  and agrees that all materials  made  available to it
         (whether  pursuant to this Section or otherwise) in connection with the
         transaction  contemplated  hereby  are  made  available  to  it  as  an
         accommodation, and without representation or warranty of any kind as to
         the  accuracy  and  completeness  of such  materials.  Buyer waives and
         releases all claims against Seller, its parent or subsidiary  companies
         or other affiliates, and its and their directors,  officers,  employees
         and  agents,  for  injury  to, or death of,  persons  or for  damage to
         property arising in any way from the conduct of the  investigations and
         examinations  contemplated  by  this  Section  or  the  conduct  of its
         employees, agents or contractors in connection with such investigations
         and  examinations  (or the  exercise of such  rights of access).  BUYER
         SHALL RELEASE,  INDEMNIFY,  DEFEND,  AND HOLD HARMLESS SELLER,  AND ITS
         PARENT  OR  SUBSIDIARY  COMPANIES  AND  OTHER  AFFILIATES,   AND  THEIR
         RESPECTIVE OFFICERS, DIRECTORS, EMPLOYEES, ATTORNEYS,  CONTRACTORS, AND
         AGENTS  (HEREINAFTER  COLLECTIVELY  REFERRED TO AS THE "SELLER GROUP"),
         FROM  ANY AND ALL  CLAIMS,  ACTIONS,  CAUSES  OF  ACTION,  LIABILITIES,
         DAMAGES,  LOSSES,  COSTS, OR EXPENSES  (INCLUDING,  WITHOUT LIMITATION,
         COURT COSTS AND ATTORNEYS' FEES), OR LIENS OR ENCUMBRANCES FOR LABOR OR
         MATERIALS  ARISING  OUT OF OR IN ANY WAY  CONNECTED  WITH SUCH  ACCESS,
         EXAMINATIONS, OR INSPECTIONS. THE FOREGOING RELEASE AND INDEMNIFICATION
         SHALL  APPLY  WHETHER OR NOT SUCH  CLAIMS,  ACTIONS,  CAUSES OF ACTION,
         LIABILITIES,  DAMAGES,  LOSSES,  COSTS,  OR  EXPENSES  ARISE OUT OF (i)
         NEGLIGENCE  (INCLUDING  CONCURRENT  NEGLIGENCE,  ACTIVE NEGLIGENCE,  OR
         PASSIVE  NEGLIGENCE,  BUT EXPRESSLY NOT INCLUDING SOLE NEGLIGENCE GROSS
         NEGLIGENCE OR WILLFUL  MISCONDUCT)  OF SELLER OR ANY OTHER  INDEMNIFIED
         PARTY, OR (ii) STRICT LIABILITY.

                  (b) Seller will  continue  the  operation of the Assets in the
         ordinary course of its business; where Seller is not the operator of an
         Asset,  Seller  will  continue  its  actions as a  non-operator  in the
         ordinary course of its business. Seller will not sell or dispose of any
         portion of the leases,  wells,  or property  or  equipment  used in the
         operation of the wells, without the prior consent of Buyer.

                                       4
<PAGE>
 
                  (c)  Seller  will  use  reasonable  efforts,  consistent  with
         industry  practices in  transactions  of this type, to identify (i) all
         preferential rights to purchase and all rights to require that consents
         to assignment be obtained which would be applicable to the transactions
         contemplated  hereby  and (ii) the  parties  holding  such  rights;  in
         attempting to identify the same,  Seller shall in no event be obligated
         to go beyond its own records.  Seller will request, from the parties so
         identified (and in accordance with the documents creating such rights),
         waivers of the preferential  rights to purchase and  requirements  that
         consents to assignment  be obtained  which were so  identified.  Seller
         shall have no obligation hereunder other than to so attempt to identify
         such  preferential  rights and  requirements for consents to assignment
         and to so  request  such  waivers,  and  shall in no event be under any
         obligation  to obtain  such  waivers.  Except to the extent that Seller
         failed to fulfill the obligations  set forth above in this  subsection,
         Buyer shall  indemnify  and hold Seller  harmless  from and against all
         claims,  actions,  liabilities,  damages,  losses,  costs or  expenses,
         including,   without  limitation,  court  costs  and  attorney's  fees,
         whatsoever  that  arise  out  of  the  failure  to  obtain  waivers  of
         preferential  rights  to  purchase  or  requirements  for  consents  to
         assignment  with respect to any transfer by Seller to Buyer of any part
         of the Assets and with respect to any subsequent transfers.  If a party
         from whom a waiver of a  preferential  right to purchase  is  requested
         fails or refuses to give such  waiver,  Seller  will tender (at a price
         equal to the amount specified in Exhibit B hereto for the wells located
         on such  Asset  and for the  units in which  such  Asset  participates,
         reduced appropriately, as determined by Seller, if less than the entire
         Asset should be tendered) the required  interest in the Asset  affected
         by such unwaived  preferential right to the holder, or holders, of such
         right who have elected not to waive such preferential right to purchase
         and if, and to the extent that, such preferential  right to purchase is
         exercised by such party or parties,  and such interest in such Asset is
         actually sold to such party or parties so exercising  such right,  such
         interest  in  such  Asset  will  be  excluded   from  the   transaction
         contemplated  hereby and the Base Purchase Price will be reduced by the
         amount paid to Seller by the party or parties exercising such right.

                  (d) Notwithstanding  any other provision in this Section,  (i)
         Seller may take any action  prohibited  by this  Section if  reasonably
         necessary under emergency conditions provided that Buyer is notified as
         soon as  practicable  thereafter;  (ii)  except  to the  extent  that a
         "Defect" (as hereinafter  defined) may result  therefrom,  Seller shall
         have no liability to Buyer for any incorrect  payment of delay rentals,
         royalties,  shut-in royalties or similar payments or for any failure to
         make such payments;  (iii)  Seller's  failure to comply with any of the
         requirements  of this  Section 5 shall not be deemed to be a default by
         Seller  hereunder  or  grant  to  Buyer  the  right  not to  close  the
         transaction  contemplated hereby,  unless such failure has a materially
         adverse impact on the value of the Assets taken as a whole.

         6.       DUE DILIGENCE REVIEWS.
                  ---------------------

                  (a) Immediately upon execution of this Agreement, Buyer shall,
         to the extent it deems  appropriate,  conduct,  at its sole cost,  such
         title  examination  or  investigation,   and  other   examinations  and
         investigations, as it may choose to conduct with respect to the Assets.
         Should,  as a  result  of  such  examinations  and  investigations,  or
         otherwise,  matters come to Buyer's  attention  which would  constitute
         "Defects" (as defined  below),  and should there be one or more of such
         Defects  which Buyer is  unwilling  to waive and close the  transaction
         contemplated  hereby  notwithstanding the fact that such Defects exist,
         Buyer  shall  notify  Seller  in  writing  of such  Defects  as soon as
         practicable,  but in no event later than April 17, 1998 (herein  called
         the

[FN]

Seller  agrees  that it shall  promptly  (within ten days of  execution  hereof)
provide Buyer copies of historical  financial  data for the  Properties  for the
years 1995, 1996 and 1997, and year-to-date information,  (including monthly and
calendar quarter summaries within those periods),  including but not limited to,
lease  operating  statements  and lease  operating  costs  reports  (detailed by
property  with  related  summaries),  and  shall  allow  Buyer's  employees  and
representatives  reasonable  access  upon  prior  written  notice to  supporting
records,  invoices  and other source  documents  insofar as required to complete
necessary audits and due diligence  procedures,  and shall reasonably  cooperate
with Buyer to enable  Buyer to  complete  audits and due  diligence  on a timely
basis, provided,  however, that Seller shall provide only such data as it has in
its  possession  and  shall  not be  obligated  to  generate  such  data  in any
particular form or format.
</FN>

                                       5
<PAGE>
 
         "Defect  Date").  Buyer's  notice of Defects  (herein  called a "Defect
         Notice")   must  include  (i)  a  brief   description   of  the  matter
         constituting  the Defect so  asserted,  (ii) the title  opinion,  other
         reports of experts,  or other  documentation on which Buyer's assertion
         of a Defect  is  based,  (iii)  such  supporting  documents  reasonably
         necessary  for  Seller (or a title  attorney  retained  by  Seller,  if
         applicable,)  to verify  the  existence  of any such  Defect,  and (iv)
         Buyer's  estimate  of the  diminution  in the sum to be paid at Closing
         resulting  from such  alleged  Defect.  Such  Defects of which Buyer so
         provides a Defect  Notice  prior to the Defect  Date are herein  called
         "Asserted  Defects".  All matters which might constitute a Defect other
         than Asserted Defects will be deemed waived for all purposes under this
         Agreement. In the event that Buyer notifies Seller of Asserted Defects,
         Seller (i) shall have the right (but not the  obligation) to attempt to
         cure,  prior to Closing,  such  Asserted  Defects;  (ii) shall have the
         right (which may be  exercised at any time before the Closing  Date) to
         require that the Closing take place, deposit the Purchase Price paid by
         Buyer and  attributable to the Assets having the Asserted Defects in an
         escrow  account and attempt to cure one or more Asserted  Defects after
         the  Closing;  (iii)  shall  have the  right  to elect  not to cure the
         Asserted Defect and adjust the Purchase Price as set forth in Section 7
         below; and (iv) shall have the right in lieu of curing or attempting to
         cure an Asserted  Defect,  to elect,  at any time prior to Closing,  to
         indemnify and hold Buyer  harmless from and against any actual  damages
         or loss (but specifically excluding consequential,  special,  punitive,
         or similar damages) Buyer may suffer as a result of a third party claim
         based on such  Asserted  Defect.  Each such  Asserted  Defect  shall be
         treated  under this  Agreement  as cured.  Should the title  opinion or
         other  materials  reviewed by Buyer  indicate  that Seller has a higher
         "Net Revenue Interest" (as hereinafter  defined) than that specified on
         Exhibit  B,  then  Buyer  shall  inform  Seller  of the same as soon as
         possible,  but in any event not later  than five (5) days  prior to the
         Closing.

                  (b)  Buyer  shall  have  the  right  to make an  environmental
         assessment of the Assets during the period beginning on the date this
         Agreement is fully executed and ending on April 17, 1998 at 5:00 P.M.
         local time, Dallas, Texas. Buyer and its agents shall have the right to
         enter upon the Assets and all buildings and improvements thereon,
         inspect the same, conduct soil and water tests and borings, and
         generally conduct such tests, examinations, investigations, and studies
         as may be necessary or appropriate for the preparation of appropriate
         engineering and other reports in relation to the Assets, their
         condition, and the presence of Hazardous Substances (as the term
         "Hazardous Substance" is defined in the Comprehensive Environmental
         Response, Compensation and Liability Act, 42 U.S.C. Sec. 9601, et seq).
         Buyer agrees to provide Seller with a copy of the environmental
         assessment promptly upon Buyer's completion thereof, including any
         reports, data, and conclusions. Buyer shall keep any data or
         information acquired by such examinations and the results of all
         analyses of such data and information strictly confidential and shall
         not disclose same to any person or agency without the prior written
         approval of Seller. BUYER SHALL RELEASE, INDEMNIFY, DEFEND, AND HOLD
         HARMLESS THE SELLER GROUP FROM AND AGAINST ANY AND ALL LOSS, COST,
         DAMAGE, EXPENSE, OR LIABILITY WHATSOEVER, INCLUDING ATTORNEYS' FEES,
         ARISING OUT OF ANY INJURY TO OR DEATH OF PERSONS OR DAMAGE TO PROPERTY
         OCCURRING IN, ON, OR ABOUT THE ASSETS AS A RESULT OF SUCH ENVIRONMENTAL
         ASSESSMENT (EXCEPT ANY SUCH INJURIES OR DAMAGES CAUSED SOLELY BY THE
         GROSS NEGLIGENCE OR WILLFULL MISCONDUCT OF ANY MEMBER OF THE SELLER
         GROUP). After March 18, 1998, Buyer shall be deemed to have inspected
         the properties or waived its right to inspect the Assets for all
         purposes and satisfied itself as to their physical and environmental
         condition, both surface and subsurface, including, but not limited to,
         conditions specifically related to the presence, release, or disposal
         of Hazardous Substances.

                                       6
<PAGE>
 
                  (c) Buyer shall assume full  responsibility for, and agrees to
         indemnify,  hold  harmless and defend Seller from and against all loss,
         liability,  claims, fines,  expenses,  costs (including attorney's fees
         and  expenses)  and causes of action  caused by or  arising  out of any
         violation  of any  environmental  law,  rule or  regulation  (including
         common law), relating to the protection of health or the environment of
         any  kind  or  character  ("Applicable  Environmental  Law(s)")  or the
         presence,  disposal,  release or  threatened  release of any  hazardous
         substance   ("Hazardous   Substance")   (as  the  terms  "release"  and
         "hazardous  substance" are defined in the  Comprehensive  Environmental
         Response,   Compensation   and  Liability   Act  (CERCLA),   42  U.S.C.
         ss.ss.9601,  et seq.) from the Assets  into the  atmosphere  or into or
         upon land or any water course or body of water,  including groundwater,
         whether  or  not  attributable  to  the  Seller's   activities  or  the
         activities  of third parties  (regardless  of whether or not the Seller
         was or is  aware of such  activities)  after  the  period  of  Seller's
         ownership of the Assets.  This  indemnification  and  assumption  shall
         apply, but is not limited to, liability for response actions undertaken
         pursuant to CERCLA or any other environmental law or regulation.

                  (d) As used in this  Agreement,  the term "Defect"  shall mean
         any  matter,  other  than a  "Permitted  Encumbrance"  (as  hereinafter
         defined),  which  causes one or more of the  following  to be a correct
         statement:

                           (i)  Seller's  ownership  of the Assets is such that,
                  with  respect to a well or unit listed on Exhibit "B" attached
                  hereto,  such ownership shall (a) not be sufficient to entitle
                  it to  receive  its  decimal  share of the oil,  gas and other
                  hydrocarbons produced from, or allocated to, such well or unit
                  which is at least that decimal share set forth on Exhibit B in
                  connection  with such well or unit in the column  headed  "Net
                  Revenue Interest" or (b) obligate it to bear its decimal share
                  of the cost of operation  of such well or unit (herein  called
                  the "Operating  Interest")  greater than the decimal share set
                  forth on Exhibit B in connection with such well or unit in the
                  column headed  "Operating  Interest"  (without a proportionate
                  increase in Net Revenue  Interest above that set forth on such
                  exhibits); or

                           (ii)  Seller's  ownership  of an Oil and Gas Property
                  shall be subject to an outstanding mortgage, deed of trust, or
                  other enforceable lien or encumbrance,  or other adverse claim
                  or  imperfection  in title,  which if asserted would cause the
                  statement  contained  in  Paragraph  (d)(i)  to  be a  correct
                  statement; or

                           (iii)  An Oil and Gas  Property  is in  violation  of
                  Applicable Environmental Laws in any material respect; or

                           (iv)   To  the   extent   Seller   has   inaccurately
                  represented  the amount of any gas  imbalances as set forth on
                  Exhibit "B".

                           (v) The Net Lease Operating Statements presented with
                  the Core East Texas  Package  do not  accurately  reflect  net
                  operating income to Seller.

                  (e) As used herein,  the term  "Permitted  Encumbrance"  shall
         mean any and all of the following:

                           (i) The terms, conditions,  restriction,  exceptions,
                  reservations  limitations  and other matters  contained in the
                  agreements,  instruments  and other  documents which create or
                  reserve to Seller its interest in any Asset, provided that the
                  same do not reduce the Net  Revenue  Interest of Seller in the
                  Asset affected  thereby to less than that set forth on Exhibit
                  B hereto;

                                       7
<PAGE>
 
                           (ii)  Royalties,   overriding  royalties  (including,
                  without limitation,  those specifically described on Exhibit A
                  hereto), division orders,  reversionary interests,  production
                  payments,  net profits interests and similar burdens affecting
                  any Oil and Gas Property if the net cumulative  effect of such
                  burdens does not operate to reduce the Net Revenue Interest in
                  the  Asset  affected  thereby  to less  than  the Net  Revenue
                  Interest set forth beside the same on Exhibit B hereto;

                           (iii)  Preferential  rights to purchase  and required
                  third party consents to assignment and similar agreements with
                  respect to which waivers or consents  shall have been obtained
                  from the appropriate  parties,  or the appropriate time period
                  for  asserting  such  rights  shall  have  expired  without an
                  exercise of such rights;

                           (iv)  Liens for taxes and  assessments  which are not
                  yet delinquent or which are being  contested by Seller in good
                  faith;

                           (v) Rights existing under  applicable laws (including
                  without limitation statutory liens) or operating agreements or
                  similar contracts to assert liens against the Assets,  but not
                  including  liens and other  rights  which have  actually  been
                  asserted, unless Seller disputes the validity of such liens or
                  the amount claimed to be owed in connection therewith, or such
                  lien or other right is not enforceable against the interest of
                  Seller;

                           (vi) Conventional  rights of reassignment  requiring
                  90 days or less notice to the holder of such rights;

                           (vii) Easements, rights-of-way,  servitudes, permits,
                  surface   leases  and  other  rights  in  respect  to  surface
                  operations, pipelines, logging, canals, ditches, reservoirs or
                  the  like;   conditions,   covenants  or  other  restrictions;
                  easements of streets, alleys, highways,  pipelines,  telephone
                  lines,   power  lines,   railways   and  other   easements  or
                  rights-of-way on, over or with respect of any Asset which does
                  not materially and adversely affect the Asset affected thereby
                  or its current use;

                           (viii) Any  obligations or duties  affecting an Asset
                  to any  municipality  or public  authority with respect to any
                  franchise,  grant,  license or permit and all applicable laws,
                  rules and order of any governmental authority;

                           (ix) All rights to consent by,  required  notices to,
                  filings  with or other  action  by  governmental  entities  in
                  connection  with the sale or conveyance of oil and gas leases,
                  permits,  or interests  therein,  if the same are  customarily
                  obtained  contemporaneously with or subsequent to such sale or
                  conveyance;

                           (x) Existing operating  agreements,  unit agreements,
                  gas purchase  contracts and any and all other agreements which
                  are  customary  in the oil and gas  exploration,  development,
                  production  or  extraction  business  or in  the  business  of
                  processing of gas and gas  condensate  or  production  for the
                  extraction of proper  products  therefrom,  to the extent that
                  the same do not reduce the Net  Revenue  Interest of Seller in
                  the Asset  affected  thereby below that set forth on Exhibit B
                  hereto;

                                       8
<PAGE>
 
                           (xii) Any other matter  waived or deemed to be waived
                  by Buyer  pursuant to the  provisions of paragraph (a) of this
                  section.

                  (f) Should  either  Seller or Buyer  determine  that Seller is
         entitled to a Net  Revenue  Interest in any Asset in excess of that set
         forth on  Exhibit B (herein  called an "NRI  Increase"),  notice  shall
         promptly be given to the other party,  and the  adjustments  to be made
         under Section 7 below shall include  adjustments  which are the subject
         of such notice.

         7. CERTAIN PURCHASE PRICE ADJUSTMENTS.  In the event that, as a part of
            ----------------------------------
the due diligence  reviews provided for in Section 6 above, (i) Asserted Defects
are  presented  to  Seller  and  Seller is unable  (or  unwilling)  to cure such
Asserted Defects prior to the Defect Cure Date, (ii) in the event that Buyer has
elected to treat an Oil and Gas  Property  affected by a casualty  loss as if it
was an Oil and Gas  Property  affected by an Asserted  Defect,  or (iii)  should
there be a NRI Increase, then:

                  (a) Buyer and Seller  shall,  with respect to each Oil and Gas
         Property affected by such matters, attempt to agree upon an appropriate
         adjustment to the Purchase Price to account for such matters; and

                  (b)  with  respect  to each Oil and Gas  Property  as to which
         Buyer and Seller are unable to agree upon  appropriate  adjustment with
         respect to all such matters affecting such Oil and Gas Property, then:

                           (i) If  the  Asserted  Defect  is a  mortgage,  lien,
                  encumbrance or other charge which is undisputed and liquidated
                  in amount,  then (subject to the  provisions of paragraph (iv)
                  below) the adjustment shall be the amount necessary to be paid
                  to remove the Asserted Defect from the affected Asset;

                           (ii) If there  shall  be an  Asserted  Defect  or NRI
                  Increase  which (a)  represents a discrepancy  between (1) the
                  Net Revenue  Interest  to which  Seller is entitled to receive
                  from any  Asset  and (2) the Net  Revenue  Interest  stated on
                  Exhibit  B,  and (b)  there  is a  Operating  Interest  change
                  proportionate  to the  change  in  the  Net  Revenue  Interest
                  resulting from the Asserted  Defect or NRI Increase,  then the
                  amount of the  adjustment  shall be the  product  of the value
                  allocated  to such  Asset as set  forth on  Exhibit  B (herein
                  called the "Allocated  Value")  multiplied by a fraction,  the
                  numerator shall be the change in the Net Revenue  Interest and
                  the denominator of which shall be the Net Revenue Interest set
                  forth on Exhibit B;

                           (iii)   If  the   Asserted   Defect   represents   an
                  obligation, encumbrance, burden, discrepancy or charge upon or
                  other  defect  in  title to the  affected  Asset of a type not
                  described  in  paragraphs  (i) or (ii) above,  the  adjustment
                  amount  shall  be   determined  by  taking  into  account  the
                  Allocated  Value of the Asset so affected,  the portion of the
                  Asset affected by the Asserted Defect, the legal effect of the
                  Asserted Defect, the potential economic effect of the Asserted
                  Defect  over the life of the  affected  Asset  and such  other
                  factors as are  necessary to make a proper  evaluation  of the
                  value of the Asserted Defect;

                                       9
<PAGE>
 
                           (iv)  Notwithstanding  any other provision  contained
                  herein,  (a)  the  aggregate  adjustment  attributable  to the
                  effect of all Asserted  Defects related to a given Asset shall
                  not exceed the Allocated Value of such Property, provided that
                  if the Asserted  Defects  exceed the  Allocated  Value of such
                  Property, the Buyer may elect to exclude such Property and the
                  Purchase  Price will be reduced by the Allocated  Value of the
                  wells on such  Property;  and (b) no adjustment  shall be made
                  with respect to an Asserted  Defect if the  diminution  in the
                  Allocated Value resulting therefrom will not exceed $1,000.00.

                           (v)  Should  the  parties  be unable to agree upon an
                  appropriate  adjustment  in light  of the  factors  set  forth
                  above,  then,  subject  to the  final  two  sentences  of this
                  Section 7, Seller may elect to either (a) exclude such Oil and
                  Gas Property from the transaction contemplated hereby, and the
                  Purchase  Price will be reduced by the Allocated  Value of the
                  wells  located on such Oil and Gas  Property  and the units in
                  which such Oil and Gas  Property  participates;  or (b) employ
                  for the purpose of  Closing,  an average of the  Seller's  and
                  Buyer's estimates of the value of the Asserted Defect, subject
                  to final  resolution  in the  context of the final  accounting
                  under the  provisions  of Section 13 hereof;  or (c) indemnify
                  and hold Buyer harmless from and against any actual damages or
                  loss (but  specifically  excluding  consequential,  special or
                  similar damages) Buyer may suffer as a result of a third-party
                  claim based on such Asserted Defect.

If the Purchase Price  reduction  which would result from the above provided for
procedure does not exceed five percent (5%) of the Base Purchase Price, then the
Purchase  Price shall not be  adjusted,  and none of the Oil and Gas  Properties
which would be excluded by such  procedure  (except for those  properties  which
Buyer, may, nevertheless,  elect to have excluded  notwithstanding the fact that
no Purchase Price  adjustment  occurs) shall be excluded.  If the Purchase Price
increase which would result from the above  provided for procedure  exceeds five
percent (5%) of the Base Purchase Price, the Purchase Price shall be adjusted by
the amount by which such increase exceeds five percent (5%) of the Base Purchase
Price.

         8. CERTAIN COVENANTS OF BUYER PENDING CLOSING.  From and after the date
            ------------------------------------------
of  this  Agreement,  Buyer  will  give  Seller  and  its  attorneys  and  other
representatives  access at all reasonable times and upon reasonable notice for a
period of seven (7) years from and after the  Closing,  to all files and records
(including  all  computer  records)  delivered  by or on  behalf  of  Seller  in
connection with the transaction  contemplated hereby, and shall permit Seller to
make  copies of any such files and  records.  Should the Assets be  subsequently
transferred  by  Buyer,  Buyer  agrees  to take all  action  in its  contractual
arrangements  relating  to such  transfer  necessary  to  allow  Seller  to have
continued access to all such files and records.

         9. CONDITIONS PRECEDENT TO THE OBLIGATIONS OF BUYER. The obligations of
            ------------------------------------------------
Buyer under this Agreement are subject to each of the following conditions being
met:

                  (a)  Each  and  every  representation  of  Seller  under  this
         Agreement  shall be true and  accurate in all  material  respects as of
         Closing  except  as  to  changes  specifically   contemplated  by  this
         Agreement or consented to by Buyer.

                  (b) Seller shall have  performed  and complied in all material
         respects with (or compliance therewith shall have been waived by Buyer)
         each and every  covenant,  agreement  and  condition  required  by this
         Agreement to be performed or complied with by Seller prior to or at the
         Closing.

                                       10
<PAGE>
 
                  (c) On or before February 24, 1998,  Buyer shall have obtained
         the approval of its Board of Directors to enter into this Agreement and
         to consummate the transactions contemplated by the Agreement.

                  (d) No suit, action or other proceedings shall, on the date of
         Closing,  be pending  or  threatened  before any court or  governmental
         agency seeking to restrain, prohibit, or obtain damages or other relief
         in connection with the consummation of the transactions contemplated by
         this Agreement.

         10. CONDITIONS  PRECEDENT TO THE OBLIGATIONS OF SELLER. The obligations
             --------------------------------------------------
of Seller under this  Agreement are subject to each of the following  conditions
being met:

                  (a)  Each  and  every   representation  of  Buyer  under  this
         Agreement  shall be true and  accurate in all  material  respects as of
         Closing  except  as  to  changes  specifically   contemplated  by  this
         Agreement or consented to by Seller.

                  (b) Buyer shall have  performed  and  complied in all material
         respects  with (or  compliance  therewith  shall  have  been  waived by
         Seller) each and every  covenant,  agreement and condition  required by
         this Agreement to be performed or complied with by Buyer prior to or at
         the Closing.

                  (c) On or before  February  24,  1998,  Seller shall each have
         obtained the approval of their  respective  Board of Directors to enter
         into this Agreement and to consummate the transactions  contemplated by
         the Agreement.

                  (d) No suit, action or other proceedings shall, on the date of
         Closing,  be pending  or  threatened  before any court or  governmental
         agency seeking to restrain, prohibit, or obtain damages or other relief
         in connection with the consummation of the transactions contemplated by
         this Agreement.

         11.      TERMINATION OF AGREEMENT.
                  ------------------------

                  (a) If any condition on the  obligations of Buyer as set forth
         in Section 9 above is not met as of the Closing  Date,  or in the event
         the Closing does not occur on or before May 1, 1998,  the  "Termination
         Date",  and in either  case  Buyer is not in breach of its  obligations
         hereunder,  this Agreement may, at the option of Buyer,  be terminated.
         Upon such termination, the parties shall have no further obligations to
         one another  hereunder  (other than the  obligations  under  Section 16
         hereof  and  under  Section  5(a)  hereof,   which  will  survive  such
         termination).

                  (b) If any condition to the obligations of Seller as set forth
         in Section 10 is not met as of the  Closing  Date,  or in the event the
         Closing does not occur on or before the Termination Date, and in either
         case Seller is not in breach of its obligations hereunder (unless Buyer
         shall also be in breach of its Obligations  hereunder),  this Agreement
         may, at the option of Seller,  be terminated.  Thereafter,  the parties
         shall have no further  obligations to one another hereunder (other than
         the obligations  under Section 16 hereof and under Section 5(a) hereof,
         which will survive such termination).

                  (c) Upon the termination of this Agreement,  whether  pursuant
         to paragraph (a) or (b) above,  Seller shall be free to sell the Assets
         (or any  portion  thereof) to any other  party  without any  limitation
         under or by reason of this  Agreement,  unless at such time a condition
         of Seller  Default shall exist.  Buyer shall  cooperate  with Seller in
         effectuating  any such sale and shall  promptly  execute any instrument
         evidencing  the  termination  of Buyer's right to acquire the Assets as
         may be  reasonably  requested by Seller.  Buyer shall also  immediately
         return  to  Seller  all  data and  other  information  (and all  copies
         thereof)  furnished  to Buyer by or on behalf  of Seller in  connection
         with this transaction

                                       11
<PAGE>
 
         12. THE  CLOSING.  The closing  (herein  called the  "Closing")  of the
             ------------
transaction  contemplated  hereby shall take place in the offices of Seller,  in
Dallas,  Texas, on April 24, 1998, at 10:00 a.m.  Central Time, or at such other
date and time as the Buyer and Seller may  mutually  agree  upon,  being  herein
called the "Closing Date"). At the Closing:

                  (a)      Seller shall:

                           (i)  execute,  acknowledge  and  deliver  to  Buyer a
                  conveyance of the Assets, (herein called the "Conveyance"), in
                  the form  attached  hereto as  Exhibit  C (and with  Exhibit A
                  hereto being  attached  thereto),  effective as to runs of oil
                  and deliveries of gas as of 7 o'clock a.m.,  Central  Standard
                  Time on January 1, 1998 (herein called the "Effective  Date");
                  and

                           (ii) execute and deliver to Buyer  letters in lieu of
                  transfer orders (or similar documentation), in form acceptable
                  to both parties; and

                           (iii)   deliver  to  Buyer  an   affidavit  or  other
                  certification (as permitted by such code) that Seller is not a
                  "foreign  person"  within  the  meaning  of  Section  1445 (or
                  similar  provisions)  of the Internal  Revenue Code of 1986 as
                  amended; and

                           (iv)     turn over possession of the Assets; and

                           (v) provide Buyer with Seller's  Officer  Certificate
                  having  the form  and  language  of  Exhibit  "D-1",  which is
                  attached hereto and made a part hereof for all purposes.  Such
                  certificate  shall  certify that Seller has complied  with and
                  performed or waived all provisions  and conditions  pertaining
                  to Seller, to be performed prior to the Closing.

                  (b)      Buyer shall:

                           (i)  deliver to the  Seller,  by wire  transfer to an
                  account  designated  by Seller in a bank located in the United
                  States,  an amount equal to (a) the Purchase  Price,  less (b)
                  the  Deposit,  less  (or  plus,  as the  case  may be) (c) any
                  adjustments made at Closing under Section 13 hereof; and

                           (ii) with  respect to the Assets  operated by Seller,
                  execute and deliver to Seller appropriate  evidence reflecting
                  change of  operator  as  required  by  applicable  authorities
                  (including,  without limitation,  Form P-4 for filing with the
                  Railroad Commission of Texas), and such evidence as Seller may
                  require  that  Buyer is  qualified  with such  authorities  to
                  succeed Seller as operator; and

                           (iii) provide Seller with Buyer's Officer Certificate
                  having  the  form  and  language  of  Exhibit  "D-2"  which is
                  attached hereto and made a part hereof for all purposes.  Such
                  Certificate  shall  certify that Buyer has  complied  with and
                  performed or waived all provisions  and conditions  pertaining
                  to Buyer, to be performed prior to the Closing.

                                       12
<PAGE>
 
         Within twenty (20) days after Closing, Seller will deliver to Buyer the
         records and other  materials  described  in Section  1(f)  above.  With
         respect  to each  Asset  with  respect  to which  Seller is  disbursing
         proceeds of production  attributable to other parties entitled thereto,
         (i) Seller shall continue to collect proceeds of production  during the
         month in which  Closing  occurs  and shall be  responsible  for  making
         disbursements,  in accordance with its normal procedures (and at normal
         times),  of such  proceeds of  production  so  collected to the parties
         entitled to same, with any proceeds of production  thereafter collected
         by Seller to be  promptly  forwarded  to Buyer  (who  shall  thereafter
         account for same to the parties entitled  thereto),  (ii) Seller shall,
         as promptly as possible after  Closing,  deliver to Buyer (a) a copy of
         its "proceeds  distribution  list" for each such Asset (which  proceeds
         distribution  list shall  include the name,  address,  social  security
         number and applicable share of proceeds of production for each party to
         whom Seller is disbursing  proceeds of production  with respect to such
         Asset),  (b) a list of all  parties  for whom it is holding in suspense
         proceeds  of  production,  (c) a list  of all  parties  for  whom it is
         holding any advance  payments made by other working interest owners for
         operations to be conducted on the Assets,  and (d) a check (which shall
         be delivered within 30 days after the end of the month in which Closing
         occurs) in an amount equal to all suspended funds and advance payments.
         Following  delivery of the materials  referred to in clause (ii), Buyer
         shall  become   responsible  for  all   disbursements  of  proceeds  of
         production (including suspense and other disbursements  attributable to
         periods prior to the Effective Date) and such  disbursement  activities
         shall be included in the matters which Buyer assumes,  and  indemnifies
         Seller with respect to, under Section 14 below.  It is  understood  and
         agreed that Seller does not  represent or warrant to Buyer the accuracy
         of the "proceeds distribution lists" so delivered.

         13.      CERTAIN ACCOUNTING ADJUSTMENTS.
                  ------------------------------

                  (a)  Appropriate  adjustments  shall be made between Buyer and
         Seller so that (i) all expenses  which are incurred in the operation of
         the Assets  before the  Effective  Date will be borne by Seller and all
         proceeds (net of applicable production,  severance,  and similar taxes)
         from sale of oil, gas and/or other minerals  produced  therefrom before
         the  Effective  Date will be received by Seller,  and (ii) all expenses
         which are  incurred in the  ownership  and/or  operation  of the Assets
         after the  Effective  Date will be borne by Buyer and all proceeds (net
         of applicable production,  severance,  and similar taxes) from the sale
         of  oil,  gas  and/or  other  minerals  produced  therefrom  after  the
         Effective Date will be received by Buyer.  It is agreed that, in making
         such  adjustments:  (i) oil  which  was  produced  from the Oil and Gas
         Properties  and  which  was,  on the  Effective  Date,  stored in tanks
         located on the Oil and Gas Properties (or located elsewhere but used by
         Seller to store oil produced from the Oil and Gas  Properties  prior to
         delivery to oil  purchasers)  and above pipeline  connections  shall be
         deemed to have been produced before the Effective Date, (ii) ad valorem
         taxes  assessed  with  respect  to a period  which the  Effective  Date
         splits, regardless of the basis on which such taxes are computed, shall
         be prorated  based on the number of days in such  period  which fall on
         each side of the  Effective  Date (with the day on which the  Effective
         Date falls being counted in the period after the Effective  Date),  and
         shall,  where the current  year's taxes are not yet known,  be based on
         the previous year's taxes, and (iii) no consideration shall be given to
         the local, state or federal income tax liabilities of any party.

                  (b) On or before five (5) days before  Closing,  Seller  shall
         prepare  and  submit to Buyer,  in  accordance  with this  Agreement  a
         proposed  statement  (herein  called the "Closing  Statement")  setting
         forth the amount by which the Purchase Price shall be adjusted  (either
         upward or downward)  based upon the  adjustments  provided in paragraph
         (a) above and

                                       13
<PAGE>
 
         otherwise  in this  Agreement.  Not  later  than two days  prior to the
         Closing Date, Buyer shall deliver to Seller a written report containing
         such  changes,  if any,  which Buyer  proposes be made to the  Purchase
         Price  Adjustment   Statement.   Seller  and  Buyer  shall  make  every
         reasonable  effort to agree upon a mutually  acceptable  Purchase Price
         prior to  Closing,  but if the  parties  fail to reach such  Agreement,
         Seller's  estimation  of the  adjustments  shall  be  employed  for the
         purpose of Closing.

                  (c) As soon as  practicable  after  Closing,  but in any event
         within sixty (60) days  thereafter,  Seller shall prepare and submit to
         Buyer, in accordance with this Agreement a proposed  statement  (herein
         called the "Final  Statement"),  which shall show the final calculation
         of the Purchase Price (herein called the "Final Settlement  Price"). As
         soon as possible after receipt of the Final Statement, but in any event
         within sixty (60) days after  receipt  thereof,  Buyer shall deliver to
         Seller a written  report  containing  the changes,  if any, which Buyer
         proposes being made to the Final Statement. In the event no response is
         made  by  Buyer  within  such  sixty  (60)  day  period,  it  shall  be
         conclusively presumed that Buyer concurs with the Final Statement,  and
         such Final Statement shall be the basis for the Final Settlement Price.
         In the event that Buyer submits a response,  the parties shall exercise
         all  reasonable  efforts to agree with  respect to the  amounts due not
         later than one hundred twenty (120) days after the Closing,  but in any
         event prior to August 15, 1998. After agreement upon a Final Settlement
         Price  setting  forth the amount by which the  Purchase  Price shall be
         adjusted  (either  upward or  downward),  the  amount due shall be paid
         within five (5) business days thereafter by the party owing the same in
         immediately available funds.

         14.  ASSUMPTION  AND  INDEMNIFICATION.  Buyer  shall,  on the  date  of
              --------------------------------
Closing,  agree  (and,  upon the  delivery to Buyer of the  Conveyance  shall be
deemed to have agreed) (a) to assume, and to timely pay and perform, all duties,
obligations and liabilities  relating to the ownership  and/or  operation of the
Assets after the Effective Date (including,  without  limitation,  those arising
under the contracts and agreements  described in Section 1(d) above), and (b) to
release,  indemnify and hold the Seller Group  harmless from and against any and
all claims, actions, liabilities,  losses, damages, costs or expenses (including
court  costs and  attorneys'  fees) of any kind or  character  arising out of or
otherwise  relating to the  ownership  and/or  operation of the Assets after the
Effective Date. In connection with (but not in limitation of) the foregoing,  it
is  specifically  understood and agreed that matters arising out of or otherwise
relating to the  ownership  and/or  operation of the Assets after the  Effective
Date shall be deemed to include all matters  arising out of the condition of the
Assets on the Effective Date (including, without limitation, within such matters
all obligations to properly plug and abandon,  or replug and  re-abandon,  wells
located on the Assets,  to restore the surface of the Assets and to comply with,
or to bring the Assets  into  compliance  with,  Applicable  Environmental  Laws
including all liability and expense for any restoration,  clean-up, disposal, or
removal  that may be  incurred  as a result of the  existence  or  discovery  of
Hazardous  Substances  or other  deleterious  substances  in,  on,  or under the
Assets, regardless of when the events occurred that give rise to such condition,
and the  assumptions,  and  indemnifications  by Buyer set forth in this Section
shall   expressly   cover  and  include  such  matters.   THE   ASSUMPTIONS  AND
INDEMNIFICATIONS  SET FORTH IN THIS  SECTION  SHALL  APPLY  WHETHER  OR NOT SUCH
DUTIES,  OBLIGATIONS, OR LIABILITIES, OR SUCH CLAIMS, ACTIONS, CAUSES OF ACTION,
LIABILITIES,  DAMAGES,  LOSSES,  COSTS,  OR EXPENSES ARISE OUT OF (i) NEGLIGENCE
(INCLUDING CONCURRENT  NEGLIGENCE,  ACTIVE OR PASSIVE NEGLIGENCE,  BUT EXPRESSLY
NOT INCLUDING SOLE NEGLIGENCE, GROSS NEGLIGENCE OR WILLFUL MISCONDUCT) OF SELLER
OR ANY OTHER INDEMNIFIED PARTY, OR (ii) STRICT LIABILITY.

                                       14
<PAGE>
 
         15.  DISCLAIMER  OF  WARRANTIES.   THE  EXPRESS   REPRESENTATIONS   AND
              --------------------------
WARRANTIES  OF SELLER  CONTAINED  IN SECTION 3. (OR IN THE  CONVEYANCE  EXECUTED
PURSUANT  TO  THIS  AGREEMENT)  ARE  EXCLUSIVE  AND  ARE IN  LIEU  OF ALL  OTHER
REPRESENTATIONS AND WARRANTIES,  EXPRESS, IMPLIED,  STATUTORY, OR OTHERWISE, AND
SELLER  EXPRESSLY   DISCLAIMS  ANY  AND  ALL  SUCH  OTHER   REPRESENTATIONS  AND
WARRANTIES.  WITHOUT  LIMITATION OF THE FOREGOING,  THE ASSETS SHALL BE CONVEYED
PURSUANT  HERETO  WITHOUT  ANY  WARRANTY  OR  REPRESENTATION,  WHETHER  EXPRESS,
IMPLIED,  STATUTORY, OR OTHERWISE RELATING TO THE CONDITION,  QUANTITY, QUALITY,
FITNESS  FOR A  PARTICULAR  PURPOSE,  CONFORMITY  TO THE  MODELS OR  SAMPLES  OF
MATERIALS,  OR  MERCHANTABILITY OF ANY EQUIPMENT OR ITS FITNESS FOR ANY PURPOSE,
AND,  EXCEPT AS PROVIDED  OTHERWISE  IN THE FIRST  SENTENCE  OF THIS  PARAGRAPH,
WITHOUT  ANY  OTHER   EXPRESS,   IMPLIED,   STATUTORY,   OR  OTHER  WARRANTY  OR
REPRESENTATION  WHATSOEVER.  BUYER  SHALL HAVE  INSPECTED,  OR WAIVED  (AND UPON
CLOSING  SHALL BE DEEMED TO HAVE WAIVED) ITS RIGHT TO INSPECT THE ASSETS FOR ALL
PURPOSES AND SATISFIED ITSELF AS TO THEIR PHYSICAL AND ENVIRONMENTAL  CONDITION,
BOTH  SURFACE  AND  SUBSURFACE,   INCLUDING,  BUT  NOT  LIMITED  TO,  CONDITIONS
SPECIFICALLY  RELATED  TO  THE  PRESENCE,  RELEASE,  OR  DISPOSAL  OF  HAZARDOUS
SUBSTANCES,  SOLID  WASTES,  ASBESTOS  OR  OTHER  MANMADE  FIBERS  OR  NATURALLY
OCCURRING  RADIOACTIVE  MATERIALS ("NORM") IN, ON, OR UNDER THE ASSETS. BUYER IS
RELYING SOLELY UPON ITS OWN INSPECTION OF THE ASSETS, AND BUYER SHALL, EXCEPT AS
PROVIDED  OTHERWISE  HEREIN,  ACCEPT ALL OF THE SAME "AS IS, WHERE IS".  WITHOUT
LIMITATION  OF THE  FOREGOING,  SELLER  MAKES  NO  WARRANTY  OR  REPRESENTATION,
EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, AS TO THE ACCURACY OR COMPLETENESS OF
ANY  DATA  REPORTS,  RECORDS,   PROJECTIONS,   INFORMATION,   OR  MATERIALS  NOW
HERETOFORE, OR HEREAFTER FURNISHED OR MADE AVAILABLE TO BUYER IN CONNECTION WITH
THIS AGREEMENT,  INCLUDING, WITHOUT LIMITATION PRICING ASSUMPTIONS OR QUALITY OR
QUANTITY OF  HYDROCARBON  RESERVES  (IF ANY)  ATTRIBUTABLE  TO THE ASSETS OR THE
ABILITY OR POTENTIAL OF THE ASSETS TO PRODUCE  HYDROCARBONS OR THE ENVIRONMENTAL
CONDITION OF THE ASSETS OR ANY OTHER  MATERIALS  FURNISHED OR MADE  AVAILABLE TO
BUYER BY SELLER OR BY SELLER'S AGENTS OR REPRESENTATIVES. ANY AND ALL SUCH DATA,
RECORDS,  REPORTS,  PROJECTIONS,  INFORMATION,  AND OTHER MATERIALS  (WRITTEN OR
ORAL)  FURNISHED BY SELLER OR OTHERWISE MADE AVAILABLE OR DISCLOSED TO BUYER ARE
PROVIDED  TO BUYER AS A  CONVENIENCE  AND SHALL  NOT  CREATE OR GIVE RISE TO ANY
LIABILITY OF OR AGAINST SELLER,  AND ANY RELIANCE ON OR USE OF THE SAME SHALL BE
AT BUYER'S SOLE RISK TO THE MAXIMUM EXTENT PERMITTED BY LAW.

         16.  COMMISSIONS.  Seller agrees to indemnify  and hold harmless  Buyer
              -----------
from and against any and all claims, obligations,  actions, liabilities, losses,
damages,  costs or expenses  (including  court costs and attorneys  fees) of any
kind or character arising out of or resulting from any agreement, arrangement or
understanding  alleged  to have been made by, or on behalf of,  Seller  with any
broker  or  finder  in  connection   with  this  Agreement  or  the  transaction
contemplated hereby. Buyer agrees to indemnify and hold harmless Seller from and
against any and all claims, obligations,  actions, liabilities, losses, damages,
costs or  expenses  (including  court costs and  attorneys  fees) of any kind or
character  arising  out of or  resulting  from  any  agreement,  arrangement  or
understanding alleged to have been made

                                       15
<PAGE>
 
by, or on behalf of,  Buyer with any  broker or finder in  connection  with this
Agreement or the transaction contemplated hereby.

         17.  CASUALTY LOSS. In the event of damage by fire or other casualty to
              -------------
the Assets prior to the Closing,  then this Agreement shall remain in full force
and effect, and (unless Buyer and Seller shall otherwise agree) in such event:

                  (a) as to each such Asset so  damaged  which is an Oil and Gas
         Property,  then,  at Buyer's  election,  either (i) such Asset shall be
         treated  as if it had an  Asserted  Defect  associated  with it and the
         procedure  provided for in Section 6 shall be  applicable  thereto,  or
         (ii) the Purchase  Price will not be adjusted,  and if Seller should be
         entitled to make any claims under any insurance  policy with respect to
         such damage,  Seller shall, at Seller's  election,  either collect (and
         when collected pay over to Buyer), or assign to Buyer, such claims; and

                  (b) as to each such  Asset  which is other than an Oil and Gas
         Property,  Seller shall, at Seller's election,  either collect for (and
         when  collected  pay over to  Buyer),  or assign to Buyer,  any and all
         insurance  claims  relating to such loss, and Buyer shall take title to
         the Asset  affected  by such loss  without  reduction  of the  Purchase
         Price.

         18. NOTICES. All notices and other  communications  required under this
             -------
Agreement shall (unless  otherwise  specifically  provided herein) be in writing
and be  delivered  personally,  by  recognized  commercial  courier or  delivery
service  (which  provides  a  receipt),  by telex or  telecopier  (with  receipt
acknowledged),  during normal  business hours or by registered or certified mail
(postage prepaid), at the following addresses:

         If to Seller:              EEX Corporation
                                    EEX Operating L.P.
                                    4849 Greenville Avenue
                                    Suite 1200
                                    Dallas, Texas 75206
                                    Attention:  Ms. Leslie Wylie
                                    Fax:  (214) 987-6682

         If to Buyer:               Cross Timbers Oil Company
                                    810 Houston St.
                                    Suite 2000
                                    Fort Worth, Texas 76102
                                    Attention:   Mr. Vaughn O. Vennerberg, II
                                    Fax: (817) 882-7224

and shall be considered delivered on the date of receipt. Either Buyer or Seller
may  specify as its proper  address  any other post  office  address  within the
continental  limits of the United States by giving notice to the other party, in
the  manner  provided  in this  Section,  at least  ten (10)  days  prior to the
effective date of such change of address.

         19.   SURVIVAL  OF   PROVISIONS.   The   obligations   covered  by  the
               -------------------------
representations  made  herein by Seller in  Section 3 and by Buyer in  Section 4
shall be true and correct on the Closing Date and shall thereafter terminate two
(2) years after the Closing Date. The obligations of the parties under Section 6

                                       16
<PAGE>
 
(to the extent the same are, by mutual agreement, not performed at Closing), and
Sections  13, 14, 15, 16, 18, and 21 shall  survive the Closing and the delivery
of the Conveyance.

         20.  OPERATIONS.  Subject to the terms and  provisions  of any existing
              ----------
agreements covering the Assets, Seller agrees to turn over to Buyer, at Closing,
the  operations  of those Assets for which it is currently  serving as operator.
Seller  shall take all  reasonable  actions  necessary  to cause Buyer to become
operator as contemplated herein.

         21.      MISCELLANEOUS MATTERS.
                  ---------------------

                  (a) After the  Closing,  Seller and Buyer  shall  execute  and
         deliver,  and shall otherwise cause to be executed and delivered,  from
         time to time,  such  further  instruments,  notices,  division  orders,
         transfer orders and other documents, and do such other and further acts
         as  reasonably  may be necessary to more fully and  effectively  grant,
         convey and assign the Assets to Buyer.

                  (b) Except as  provided  in the  following  sentence,  neither
         party  shall have the right to assign its rights  under this  Agreement
         and any such  assignment in violation of this provision  shall be void.
         Without  Buyer's  consent,  Seller may  assign  its  rights  under this
         Agreement  to a direct or  indirect  parent of  Seller,  to a direct or
         indirect  subsidiary  of  Seller,  or to an entity  that is a direct or
         indirect subsidiary of a direct or indirect parent of Seller.

                  (c) No  waiver of any  provision  of this  Agreement  shall be
         deemed or shall  constitute a waiver of any provision of this Agreement
         (whether or not similar), nor shall such waiver constitute a continuing
         waiver unless otherwise expressly provided.

                  (d) To the extent  applicable to the transaction  contemplated
         hereby,  or any portion  thereof,  Buyer waives the  provisions  of the
         Texas Deceptive Trade Practices Act, Chapter 17, Subchapter E, Sections
         17.41 through 17.63,  inclusive (other than Section 17.555 which is not
         waived),  Texas  Business and Commerce  Code. In  connection  with such
         waiver,  Buyer hereby  represents and warrants to Seller that Buyer (a)
         is in the  business  of seeking or  acquiring,  by  purchase  or lease,
         goods,  or services,  for commercial or business use, (b) has assets of
         Five Million and No/100  Dollars  ($5,000,000.00)  or more according to
         its most recent financial  statement,  (c) has knowledge and experience
         in financial and business matters that enable it to evaluate the merits
         and risks of the  transaction  contemplated  hereby and (d) is not in a
         significantly disparate bargaining position.

                  (e) In  connection  with  Buyer's  evaluation  of the  Assets,
         Seller shall disclose to Buyer certain confidential information,  which
         is  proprietary,  and  includes,  but is not  necessarily  limited  to,
         geological and geophysical data; maps, models, and interpretations; and
         commercial,  contractual,  and  financial  information.  All such  data
         disclosed  by Seller to Buyer shall  hereinafter  be referred to as the
         "Confidential  Information".  If, for any reason the  Closing  does not
         occur,  Buyer agrees that the  Confidential  Information  shall be kept
         strictly  confidential  and shall not be sold,  traded,  published,  or
         otherwise  disclosed to anyone in any manner  whatsoever,  including by
         means of photocopy or  reproduction,  without  Seller's  prior  written
         consent,  except  as  provided  in  Sections  21.e(i),   21.e(ii),  and
         21.e.(iii) below.

                           (i) Buyer may disclose the  Confidential  Information
                  without Seller's prior written consent only to the extent such
                  information:

                                       17
<PAGE>
 
                                    (a)     is already known to Buyer as of the 
                           date of disclosure hereunder;

                                    (b) is already in  possession  of the public
                           or becomes available to the public other than through
                           the act or omission of Buyer;

                                    (c)  is  required  to  be  disclosed   under
                           applicable  law or by a governmental  order,  decree,
                           regulation,  or rule  (provided that Buyer shall give
                           written  notice to Seller prior to such  disclosure);
                           or

                                    (d) is acquired  independently  from a third
                           party  that  has  the  right  to   disseminate   such
                           information at the time it is acquired by Buyer.

                           (ii) Buyer may disclose the Confidential  Information
                  without  Seller's  prior  written  consent  to  an  Affiliated
                  Company  (as   hereinafter   defined),   provided  that  Buyer
                  guarantees  the  adherence of such  Affiliated  Company to the
                  terms of this Agreement.  "Affiliated  Company" shall mean any
                  company or legal entity that (a) controls  either  directly or
                  indirectly  a party,  or (b) that is  controlled  directly  or
                  indirectly  by such party,  or (c) is  directly or  indirectly
                  controlled  by a company or entity that directly or indirectly
                  controls  such  party.  "Control"  means the right to exercise
                  fifty  percent  (50%)  or more  of the  voting  rights  in the
                  appointment of the directors of such company.

                           (iii)  Buyer  shall  be  entitled  to  disclose   the
                  Confidential   Information   without  Seller's  prior  written
                  consent to such of the following persons who have a clear need
                  to know in order to evaluate  Seller's  petroleum  exploration
                  and production rights:

                                    (a)     employees, officers, and directors 
                           of Buyer;

                                    (b)     employees, officers, and directors
                           of an Affiliated Company;

                                    (c) any  professional  consultant  or  agent
                           retained by Buyer for the purpose of  evaluating  the
                           Confidential Information.

                           (iv) Prior to making any such  disclosures to persons
                  under subparagraph  21.e.(iii)(c) above, however,  Buyer shall
                  obtain an undertaking of confidentiality, in the same form and
                  content as this Agreement, from each such person.

                           (v) Buyer and its Affiliated Companies, if any, shall
                  use,  or  permit  the  use  of  the  Confidential  Information
                  disclosed under Section  21.(e)(ii) or 21.(e)(iii) above, only
                  to evaluate  petroleum  exploration and production rights held
                  by Seller.

                           (vi) Buyer shall be responsible for ensuring that all
                  persons  to whom the  Confidential  Information  is  disclosed
                  under this Agreement shall keep such information  confidential
                  and shall not disclose or divulge the same to any unauthorized
                  person.  Neither party shall be liable in an action  initiated
                  by  one  against   the  other  for   special,   indirect,   or
                  consequential  damages  resulting  from or arising out of this
                  Agreement,  including,  without limitation,  loss of profit or
                  business interruptions, however same may be caused.

                                       18
<PAGE>
 
                           (vii) The Confidential  Information  shall remain the
                  property of Seller,  and Seller may demand the return  thereof
                  at any time upon giving  written  notice to Buyer.  Within ten
                  (10) days of receipt of such notice, Buyer shall return all of
                  the original  Confidential  Information  and shall destroy all
                  copies and reproductions  (both written and electronic) in its
                  possession  and in the  possession  of  persons to whom it was
                  disclosed  pursuant to  Sections  21.(e)(ii)  and  21.(e)(iii)
                  hereof.

                           (viii) The term of this Section 21.(e) and the rights
                  and obligations created hereunder shall commence upon the date
                  hereof  and  shall  continue  for a  period  of two (2)  years
                  thereafter.

                           (ix) Seller makes no  representations  or warranties,
                  express  or  implied,  as  to  the  quality,   accuracy,   and
                  completeness  of  the   Confidential   Information   disclosed
                  hereunder.  Seller  and its  Affiliated  Companies,  and their
                  officers,  directors,   employees,  shall  have  no  liability
                  whatsoever  with  respect to the use of or  reliance  upon the
                  Confidential Information by Buyer.

                  (f) This Agreement and that certain Confidentiality  Agreement
         dated  February  10, 1998 between  Seller and Buyer  contain the entire
         understanding  of the parties hereto with respect to the subject matter
         hereof   and   supersede   all   prior   agreements,    understandings,
         negotiations,  and  discussions  among the parties with respect to such
         subject matter between Seller and Buyer. The headings contained in this
         Agreement are for convenience  only and shall not control or affect the
         meaning or construction of any provision of this Agreement. Within this
         Agreement, words of any gender shall be held and construed to cover any
         other gender,  and words in the singular shall be held and construed to
         cover the plural, unless the context otherwise requires. Time is of the
         essence in this Agreement.

                  (g) This  Agreement  may be amended,  modified,  supplemented,
         restated,  or discharged (and provisions  hereof may be waived) only by
         an instrument in writing  signed by the party against whom  enforcement
         of the amendment, modification,  supplement,  restatement, or discharge
         (or waiver) is sought.

                  (h) Each party shall bear and pay all  expenses it incurred in
         connection with the transaction contemplated by this Agreement.

                  (i) This Agreement  shall be binding on the parties hereto and
         their respective successors and assigns.

                  (j) This  Agreement  shall not confer  any rights or  remedies
         upon any  person  other  than  Seller  and Buyer  and their  respective
         successors and permitted assigns.

                  (k) All  production  from oil and gas wells,  and all proceeds
         from the sale thereof,  including  proceeds from the sale of any oil in
         storage  above the pipeline  connection,  and any  accounts  receivable
         balances,   funds  held  in  suspense  or  escrow,  any  of  which  are
         attributable to production  prior to the Effective  Date,  shall be the
         property  of Seller.  All  production  from oil and gas wells,  and all
         proceeds from the sale thereof  attributable  to  production  after the
         Effective Date shall be the property of Buyer.

                                       19
<PAGE>
 
                  (l)  This   Agreement   may  be   executed   in  two  or  more
         counterparts,  each of which  shall be deemed an  original,  but all of
         which shall  constitute  one and the same  instrument.  It shall not be
         necessary for both parties to sign the same counterpart.

                  (m) Buyer shall  properly  execute,  acknowledge  and file the
         Conveyance for record immediately upon receipt thereof and will furnish
         to  Seller  a copy of the  recorded  document  promptly  after  Buyer's
         receipt  of such  recorded  instrument  from the clerk in the county or
         parish  in  which  the  Conveyance  is  recorded.  In  addition,  where
         applicable,  Buyer shall execute any forms  required to effect a change
         of operator for all wells conveyed herein.

                  (n)  Pursuant  to the  Federal  Arbitration  Act,  the parties
         hereby agree that any controversy,  claim, or alleged breach, including
         but not  limited  to torts  and  statutory  claims,  arising  out of or
         related to this  Agreement  shall be  settled  by  binding  arbitration
         administered  by  the  American  Arbitration   Association  ("AAA")  in
         accordance   with  its  Commercial   Arbitration   Rules.   Demand  for
         arbitration  may be made no later than the time that such action  would
         be permitted  under the  applicable  Texas statute of  limitation.  Any
         disputes  regarding the timeliness of the demand for arbitration  shall
         be decided by the  arbitrator(s).  Judgment upon the award  rendered by
         the  arbitrator(s)  may be  entered  in any Court  having  jurisdiction
         thereof in order to obtain compliance therewith.  Any case in which any
         claim, or combination of claims,  exceeds  $500,000.00 shall be subject
         to the AAA's Large, Complex Case Procedures and decided by the majority
         of a panel of three (3) neutral  arbitrators.  In rendering  the award,
         the  arbitrator's  shall  determine the rights and  obligations  of the
         parties  according to the laws of the State of Texas.  The  arbitration
         proceedings  and hearings  shall be  conducted at the Houston  Regional
         Office of the AAA or at such other  place as may be  selected by mutual
         agreement.  No party nor the  arbitrator(s) may disclose the existence,
         content,  or results of any  arbitration  hereunder  without  the prior
         written consent of all parties.

                  (o) Prior to and subsequent to Closing,  Buyer shall not issue
         any  publicity  or  press  release  concerning  this  Agreement  or the
         transaction  contemplated  hereby without the prior written  consent of
         Seller,  unless, in the written opinion of legal counsel  acceptable to
         Seller,  such  disclosure  is  required  by  applicable  law  or  other
         applicable rules or regulations of any governmental  authority or stock
         exchange and such publicity or press release  contains no more than the
         minimum information necessary to comply therewith. This provision shall
         not replace or restrict any  provision in any prior  agreement  between
         the parties affecting  confidentiality or the disclosure of information
         about the Assets.

         IN WITNESS WHEREOF, this Agreement is executed by the parties hereto on
the date set forth above.

SELLER:                                     BUYER:
EEX CORPORATION                             CROSS TIMBERS OIL COMPANY



By:    /s/ C. L. Elsey                      By:    /s/ Bob R. Simpson
       ---------------                             ------------------

Name:  C. L. Elsey                          Name:     Bob. R. Simpson
                                                   ------------------
Title:  Attorney-In-Fact                    Title:       Chairman
                                                   ------------------

                                       20
<PAGE>
 
EEX OPERATING L.P.
By:    EEX CORPORATION
       General Partner


By:    /s/ C.L. Elsey
      ---------------
Name:   C. L. Elsey
Title:    Attorney-In-Fact

                                       21
<PAGE>
 
                                ACKNOWLEDGEMENTS
                                ----------------


STATE OF TEXAS                                      ss.
                                                    ss.
COUNTY OF TARRANT                                   ss.

         This instrument was  acknowledged  before me, Notary Public,  this 16th
day of February,  1998,  by C. L. Elsey,  Attorney-In-Fact  of EEX  CORPORATION,
General Partner for EEX OPERATING L.P., a Texas limited  liability  partnership,
on behalf of the partnership.

         IN WITNESS WHEREOF, I hereunto set my hand and official seal.


                                                    /s/ Kim Fields Rhoads
                                                    ---------------------
                                                    Notary Public

My commission expires:

          11/13/99
- ---------------------



STATE OF TEXAS                                    (S)
                                                  (S)
COUNTY OF TARRANT                                 (S)

     This instrument was acknowledged before me, Notary Public, this 16th day of
February,  1998, by C. L. Elsey,  Attorney-In-Fact  of EEX CORPORATION,  a Texas
corporation, on behalf of the corporation.

     IN WITNESS WHEREOF, I hereunto set my hand and official seal.



                                                        /s/ Kim Fields Rhoads
                                                        --------------------
                                                        Notary Public

My commission expires:

           11/13/99
- --------------------

                                       22
<PAGE>
 
STATE OF TEXAS                                            (S)
                                                          (S)
COUNTY OF TARRANT                                         (S)

         This instrument was  acknowledged  before me, Notary Public,  this 16th
day of February, 1998, by Bob R. Simpson, Chairman of Cross Timbers Oil Company,
a Delaware corporation, on behalf of the corporation.

         IN WITNESS WHEREOF, I hereunto set my hand and official seal.



                                                           /s/ Kim Fields Rhoads
                                                           ---------------------
                                                           Notary Public

My commission expires:

         11/13/99
- ---------------------

                                       23
<PAGE>
 
                                    EXHIBITS

           Exhibit "A"      -     Core East Texas Package, Ownership Summary
           Exhibit "A-1"    -     Proposed Asset Sale
           Exhibit "A-2"    -     Cotton Valley Reef Play, East Texas Basin
           Exhibit "B"      -     Properties and Gas Imbalances
           Exhibit "C"      -     Conveyance
           Exhibit "D-1"    -     Officer's Certificate
           Exhibit "D-2"    -     Officer's Certificate
           Exhibit "E"      -     Field Offices

                                       24

<PAGE>
 
                                                                  EXHIBIT 2.2
[CROSS TIMBERS OIL COMPANY LETTERHEAD]

March 20, 1998


EEX Corporation
EEX Operating L.P.
4849 Greenville Avenue, Suite 1200
Dallas, Texas  75206
Attention:  Ms. Leslie Wylie

Re:      Amendment to Purchase and Sale Agreement dated February 12, 1998,
         between EEX Operating L.P., et al. and Cross Timbers Oil Company

Dear Ms. Wylie:

This letter,  when  executed by all parties,  will evidence the agreement of EEX
Corporation,  EEX Operating  L.P.,  and Cross Timbers Oil Company,  to amend the
referenced  Purchase and Sale Agreement dated February 12, 1998,  related to oil
and gas properties in East Texas and Louisiana, in the following respects:

1.       The March 18, 1998 date, appearing in the 22nd line of Section 6(b), is
         hereby amended to April 17, 1998.

2.       The  following  sentence  shall be added  to the end of  Section  5(a),
         to-wit:  "IT IS  EXPRESSLY  AGREED  BETWEEN THE PARTIES  THAT  SELLER'S
         OBLIGATIONS  TO BUYER  RELATING TO SELLER'S  SOLE  NEGLIGENCE  OR GROSS
         NEGLIGENCE  AS  PROVIDED  ABOVE  SHALL BE LIMITED  TO CLAIMS  RAISED OR
         THREATENED  IN WRITING  DURING THE TWO YEAR  PERIOD  AFTER THE  CLOSING
         DATE."

3.  Section  13(a)  shall be  deleted  in its  entirety  and  replaced  with the
following provision:

         "        (a)      At Closing, appropriate adjustments shall be made
         between Buyer and Seller as follows:

                  (i)      All expenses  which are incurred in the  operation of
                           the Assets before the Effective Date will be borne by
                           Seller.

                  (ii)     All  revenue  attributable  to the  sale of oil,  gas
                           and/or other minerals produced from the Assets before
                           the  Effective  Date  will  be  retained  by  Seller,
                           including oil which was produced from the Oil and Gas
                           Properties  and which  was,  on the  Effective  Date,
                           stored in tanks located on the Oil and Gas Properties
                           (or located elsewhere but used by Seller to store oil
                           produced from such
<PAGE>
 
EEX Corporation
EEX Operating L.P.
March 20, 1998
Page 2




               Properties  prior  to  delivery  to  oil  purchasers)  and  above
               pipeline  connections.  (Such  oil  shall be  deemed to have been
               produced before the Effective Date.)

         (iii) An amount  representing  the estimate of revenue  attributable to
               production from the Assets for the period from the Effective Date
               to the  Closing  Date shall be  credited  to Buyer on the Closing
               Statement,  which amount shall be agreed to by the parties  prior
               to Closing.  For purposes of this item (iii), the phrase "revenue
               attributable  to  production  from the Assets"  shall include all
               value,  credits  or  bonuses to be  received  by Seller  from the
               purchasers of production (excluding any amounts received pursuant
               to contracts with Encogen One Partners,  Ltd.); provided that, on
               any gas  delivered  under  contracts  with Encogen One  Partners,
               Ltd., or its agent or any related  party,  for the benefit of the
               cogeneration  plant near Sweetwater,  Texas, then the estimate of
               revenue to be  credited  to Buyer at Closing  shall be based upon
               the  price  payable  for  gas,  produced  in  each  given  month,
               reflected in the Index (large  packages only) posted in the first
               monthly  publication for the given month of Inside F.E.R.C.'s Gas
                                                           ---------------------
               Market Report under the heading "Houston Ship Channels/Beaumont,
               -------------
               Texas", less $.13 per MMBtu.

          (iv) An amount  shall be  charged  to Buyer on the  Closing  Statement
               reflecting  an  estimate of  expenses  which are  incurred in the
               ownership  and/or  operation of the Assets  incurring  during the
               period  from the  Effective  Date to the date of  Closing,  which
               amount  shall be agreed to by the parties  prior to Closing.  For
               purposes  of this  item  (iv),  the  phrase  "expenses  which are
               incurred in the ownership  and/or  operation of the Assets" shall
               mean normal and  recurring  direct  field  operational  costs and
               expenses  attributable  to Seller's  interest in the Assets,  and
               shall  expressly  exclude  any  general  and   administrative  or
               overhead  charges, except for any such charges properly billed by
               third  parties  pertaining  to non-operated properties. (It being
               agreed  that  any  overhead  charges  directly  billed  by EEX to
               unrelated  working  interest  partners  for  the  period from the
               Effective Date to the date of Closing shall be retained by EEX.)

  It  is  agreed  that  the  volumes  of  production  used in calculation of the
  estimated  revenue in item (iii) above and the estimated expenses in item (iv)
  above  shall be adjusted based upon actuals identified for the purposes of the
  Final Statement called for in subparagraph (c) below."
<PAGE>
 
                           EEX Corporation
EEX Operating L.P.
March 20, 1998
Page 3



4.       The following sentence shall be added to the end of Section 14, to-wit:
         "IT IS EXPRESSLY  AGREED BETWEEN THE PARTIES THAT SELLER'S  OBLIGATIONS
         TO BUYER  RELATING TO SELLER'S SOLE  NEGLIGENCE OR GROSS  NEGLIGENCE AS
         PROVIDED  ABOVE  SHALL BE LIMITED  TO CLAIMS  RAISED OR  THREATENED  IN
         WRITING DURING THE TWO YEAR PERIOD AFTER THE CLOSING DATE."

To evidence the  agreement of EEX  Corporation  and EEX  Operating  L.P. to this
Amendment to the Purchase and Sale  Agreement  dated  February 12, 1998,  please
have  two  copies  of  this  letter  executed  in the  spaces  provided  for the
respective organizations, and return a fully executed copy to this writer.

Executed on behalf of Cross Timbers Oil Company:



By:      /s/ Bob R. Simpson
         ------------------    
         Bob R. Simpson
         Chairman



Acknowledged and agreed to, effective as of February 12, 1998.

EEX CORPORATION                            EEX OPERATING L.P.
                                           By:  EEX CORPORATION, General Partner


By:      /s/ C. L. Elsey                          By:       /s/ C. L. Elsey
         ---------------                                    ---------------
         C. L. Elsey                                        C. L. Elsey
         Attorney-in-Fact                                   Attorney-in-Fact

<PAGE>
 
                                                                    EXHIBIT 99.1

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

                                   $750,000

                          REVOLVING CREDIT AGREEMENT


                                     among


                          CROSS TIMBERS OIL COMPANY,
                                  as Borrower


                               The Several Banks
                       from Time to Time Parties Hereto


                  MORGAN GUARANTY TRUST COMPANY OF NEW YORK,
                            as Administrative Agent


                          NATIONSBANK OF TEXAS, N.A.,
                             as Syndication Agent


                                      and


                          CHASE BANK OF TEXAS, N.A.,
                            as Documentation Agent


                          Dated as of April 17, 1998


- --------------------------------------------------------------------------------
<PAGE>
 
                               TABLE OF CONTENTS

                                   ARTICLE I

                              DEFINITION OF TERMS


                                   ARTICLE 2

                          THE REVOLVING CREDIT LOANS

2.01.   Revolving Loan Commitments...........................................22
2.02.   Manner of Borrowing..................................................24
2.03.   Interest Rate........................................................26
2.04.   Borrowing Base Increase Fee..........................................28
2.05.   Up-Front Fees........................................................28
2.06.   Maximum Number of Eurodollar Borrowings..............................28


                                   ARTICLE 3

                                   GUARANTY

3.01.   Guaranty.............................................................29


                                   ARTICLE 4

                            NOTES AND NOTE PAYMENTS

4.01.   Notes................................................................29
4.02.   Prepayments..........................................................29
4.03.   Payment of Interest on the Notes.....................................30
4.04.   Calculation of Interest Rates........................................30
4.05.   Manner and Application of Payments...................................31


<PAGE>
 
4.06.   Pro Rata Treatment...................................................31
4.07.   Lending Office.......................................................31
4.08.   Taxes................................................................32
4.09.   Sharing of Payments, etc.............................................33

                                   ARTICLE 5

                                BORROWING BASE

5.01.   Borrowing Base Tests.................................................34
5.02.   Initial Borrowing Base...............................................35
5.03.   Subsequent Determination of Borrowing Base...........................35
5.04.   Special Determination of Borrowing Base..............................38
5.05.   Interim Sales of Mineral Properties..................................39
5.06.   Borrowing Base Deficiency............................................41
5.07.   Reserve Report and Gas Report Matters................................44

                                   ARTICLE 6

                        REPRESENTATIONS AND WARRANTIES

6.01.   Organization and Good Standing.......................................45
6.02.   Authorization and Power..............................................45
6.03.   No Conflicts or Consents.............................................46
6.04.   Enforceable Obligations..............................................46
6.05.   No Liens.............................................................46
6.06.   Financial Condition..................................................46
6.07.   Full Disclosure......................................................46


                                     - ii
<PAGE>
 
6.08.   No Default...........................................................47
6.09.   Material Agreements..................................................47
6.10.   No Litigation........................................................47
6.11.   Burdensome Contracts.................................................47
6.12.   Estimated Oil and Gas Reserves.......................................47
6.13.   Use of Proceeds; Margin Stock........................................47
6.14.   Taxes................................................................48
6.15.   Principal Office, Etc................................................48
6.16.   ERISA................................................................48
6.17.   Compliance with Law..................................................48
6.18.   Government Regulation................................................48
6.19.   Insider..............................................................48
6.20.   No Subsidiaries......................................................49
6.21.   Environmental Matters................................................50
6.22.   Title to Properties..................................................50
6.23.   Gas Marketing Subsidiaries' Obligations..............................50
6.24.   Formation of Proposed Royalty Trust..................................50
6.25.   Representations and Warranties.......................................50
6.26.   Survival of Representations, Etc.....................................50

                                   ARTICLE 7

                             CONDITIONS PRECEDENT

7.01.   Commitment...........................................................51
7.02.   All Advances.........................................................52


                                     - iii
<PAGE>
 
7.03.   EEX Acquisition......................................................53

                                   ARTICLE 8

                             AFFIRMATIVE COVENANTS

8.01.   Financial Statements, Reports and Documents..........................53
8.02.   Payment of Taxes and Other Indebtedness..............................56
8.03.   Maintenance of Existence and Rights; Conduct of Business.............57
8.04.   Notice of Default....................................................57
8.05.   Other Notices........................................................57
8.06.   Compliance with Loan Papers..........................................57
8.07.   Compliance with Material Agreements..................................57
8.08.   Operations and Properties............................................57
8.09.   Books and Records; Access............................................59
8.10.   Compliance with Law..................................................59
8.11.   Leases...............................................................59
8.12.   Development and Maintenance..........................................59
8.13.   Insurance............................................................58
8.14.   Authorization and Approvals..........................................59
8.15.   Experienced Management...............................................59
8.16.   ERISA Compliance.....................................................59
8.17.   Further Assurances...................................................59
8.18.   Environmental........................................................59
8.19.   Pledge of Properties.................................................60
8.20.   Gas Marketing Subsidiaries Guaranties................................60

                                     -iv-
<PAGE>
 
8.21.   Guaranty of Cross Timbers Trading Company............................60
8.22.   Formation of Proposed Royalty Trust..................................61


                                   ARTICLE 9

                              NEGATIVE COVENANTS

9.01.   Limitation on Indebtedness...........................................61
9.02.   Negative Pledge......................................................62
9.03.   Dividends and Distributions..........................................62
9.04.   Limitation on Investments............................................62
9.05.   Alteration of Material Agreements....................................62
9.06.   Certain Transactions.................................................63
9.07.   Limitation on Sale of Properties.....................................63
9.08.   Name, Fiscal Year and Accounting Method..............................64
9.09.   Current Ratio........................................................64
9.10.   Liquidation, Mergers, Consolidations and Dispositions
        of Substantial Assets................................................64
9.11.   Lines of Business....................................................64
9.12.   No Amendments........................................................64
9.13.   Purchase of Substantial Assets.......................................64
9.14.   Guaranties...........................................................64
9.15.   Leases; Sale and Leaseback...........................................65
9.16.   Restriction on Loans.................................................65
9.17.   Speculative Trading..................................................65
9.18.   Hedging Agreements...................................................65

                                      - v
<PAGE>
 
9.19.   Prepayment or Redemption of Subordinated Indebtedness................65
9.20.   Payments Respecting Permitted Margin Debt............................66
9.21.   Formation of Proposed Royalty Trust..................................66
9.22.   Strict Compliance....................................................66

                                  ARTICLE 10

                               EVENTS OF DEFAULT

10.01.  Events of Default....................................................67
10.02.  Remedies Upon Event of Default.......................................69
10.03.  Performance by Banks.................................................70
10.04.  Formation of Proposed Royalty Trust..................................70

                                  ARTICLE 11

                               AGENCY PROVISIONS

11.01.  Appointment and Authorization........................................70
11.02.  Consultation with Counsel............................................71
11.03.  Documents............................................................71
11.04.  Resignation..........................................................71
11.05.  Responsibility.......................................................71
11.06.  Notices of Event of Default..........................................72
11.07.  Independent Investigation............................................72
11.08.  Indemnification......................................................72
11.09.  Forwarding of Information to Banks...................................73
11.10.  Benefit of Article 11................................................73

                                     - vi
<PAGE>
 
                                  ARTICLE 12

       SPECIAL PROVISIONS FOR EURODOLLAR AND CD LOANS; YIELD PROTECTION

12.01.  Inadequacy of Pricing................................................73
12.02.  Illegality...........................................................74
12.03.  Increased Costs for Loans............................................74
12.04.  Effect on Other Loans................................................75
12.05.  Payments Not At End of Interest Period...............................75
12.06.  Capital Adequacy.....................................................75

                                  ARTICLE 13

                                 MISCELLANEOUS

13.01.  Modification.........................................................76
13.02.  Accounting Terms and Reports.........................................76
13.03.  Waiver...............................................................76
13.04.  Payment of Expenses; Documentary Taxes; Indemnification..............77
13.05.  Notices..............................................................78
13.06.  Governing Law........................................................78
13.07.  Choice of Forum; Consent to Service of Process and Jurisdiction;
        Waiver of Rights to Jury Trial.......................................79
13.08.  Invalid Provisions...................................................79
13.09.  Maximum Interest Rate................................................80
13.10.  Offset...............................................................80
13.11.  Chapter 346..........................................................80
13.12.  Entirety.............................................................81


                                     - vii
<PAGE>
 
13.13.  Headings.............................................................81
13.14.  Survival.............................................................81
13.15.  Successors and Assigns...............................................81
13.16.  Foreign Banks, Participants, and Assignees...........................82
13.17.  No Third Party Beneficiary...........................................83
13.18.  Acknowledgements.....................................................83
13.19.  Multiple Counterparts................................................83
13.20.  Notice and Acknowledgement of No Oral Agreements.....................83

                                     -viii
<PAGE>
 
                          REVOLVING CREDIT AGREEMENT
                          --------------------------

     This REVOLVING CREDIT AGREEMENT (the "Loan Agreement") is entered into as
of this 17th day of April, 1998 by and among CROSS TIMBERS OIL COMPANY, a
Delaware corporation (hereinafter called "Company"), each Bank which from time
to time become parties hereto, MORGAN GUARANTY TRUST COMPANY OF NEW YORK, as
Administrative Agent for Banks (herein the "Administrative Agent"), NATIONSBANK
OF TEXAS, N.A. as Syndication Agent for Banks (herein the "Syndication Agent")
and CHASE BANK OF TEXAS, N.A., as Documentation Agent for Banks (herein the
"Documentation Agent").


                              W I T N E S S E T H:
                              - - - - - - - - - - 

     WHEREAS, Company, Agents, and certain Banks parties hereto have entered
into the Prior Loan Agreement (as defined herein); and

     WHEREAS, Company desires to increase the credit available under the Prior
Loan Agreement and to amend and restate the Prior Loan Agreement in its entirety
by entering into this Loan Agreement; and

     WHEREAS, Company and Banks are willing to increase the credit available
under the Prior Loan Agreement and to amend and restate the Prior Loan Agreement
in its entirety upon the terms and subject to the conditions set forth in this
Loan Agreement.

     WHEREAS, J. P. Morgan Securities, Inc. and NationsBanc Montgomery
Securities LLC, have acted in the capacity of Arrangers for Company and Banks in
connection with the consummation of the transactions contemplated by this Loan
Agreement.

     NOW, THEREFORE, in consideration of the mutual promises herein contained
and for other valuable consideration, the parties hereto do hereby agree as
follows:


                                   ARTICLE 1
                                   ---------

                              DEFINITION OF TERMS
                              -------------------

     For the purposes of this Loan Agreement, unless the context otherwise
requires, the following terms shall have the respective meanings assigned to
them in this Article 1 or in the section or recital referred to below:

     "Adjusted PV Borrowing Base Test":  Section 5.01(a)(ii).

     "Adjusted CD Rate" shall, with respect to each Interest Period, mean on any
day thereof the quotient of (a) the CD Quoted Rate with respect to such Interest
Period divided by (b) the remainder of 1.00 minus the CD Reserve Requirement in
effect on such day.
<PAGE>
 
     "Adjusted InterBank Rate" shall, with respect to each Interest Period, mean
on any day thereof the quotient of (a) the InterBank Offered Rate with respect
to such Interest Period, divided by (b) the remainder of 1.00 minus the
Eurodollar Reserve Requirement in effect on such day.

     "Administrative Agent":  The preamble, and as otherwise provided in Article
11.

     "Advance":  Section 2.01.

     "Affected Borrowings":  Section 12.01.

     "Affiliate" of any Person shall mean any Person which, directly or
indirectly, controls, is controlled by, or is under common control with, such
Person.  For the purposes of this definition, "control" (including, with
correlative meanings, the terms "controlled by" and "under common control
with"), as used with respect to any Person, shall mean the possession, directly
or indirectly, of the power to direct or cause the direction of the management
and policies of such Person, whether through the beneficial or record ownership
of a majority of the outstanding voting securities or equity interests or by
contract or otherwise.

     "Agent" or "Agents":  Administrative Agent and Syndication Agent, and as
otherwise provided in Article 11.

     "Applicable Margin" shall mean, at such times and from time to time as the
Borrowing Base Percentage then in effect is within one of the following ranges
or, during the period from the Closing Date to April 15, 1999, the Total
Outstandings are less than or greater than the Threshold Amount for the
applicable range, as the case may be, with respect to any Borrowing, the
percentage per annum set forth below opposite the relevant type of Borrowing and
the relevant range.

     Type of Borrowing                                Applicable Margin
     -----------------                                -----------------

A.   Floating Base Borrowing:
 
Range 1:  The Borrowing Base Percentage is 
          less than or equal to 75%                          0.00%
 
Range 2:  The Borrowing Base Percentage is 
          greater than 75% and (for the period 
          from the Closing Date to April 15, 
          1999) the Total Outstandings are less 
          than the Threshold Amount                          1/4%

 
Range 3:  During the period from the Closing 
          Date to April 15, 1999, the Total 
          Outstandings are equal to or greater 
          than the Threshold Amount                          3/8%

                                      -2-
<PAGE>
 
B.   Eurodollar Borrowing:
     ---------------------
 
Range 1:  The Borrowing Base Percentage is 
          less than or equal to 50%                          3/4%
 
Range 2:  The Borrowing Base Percentage is 
          greater than 50% but less than or equal 
          to 75%                                             1%

Range 3:  The Borrowing Base Percentage is 
          greater than 75% and (for the period 
          from the Closing Date to April 15, 
          1999) the Total Outstandings are less  
          than the Threshold Amount                          1 1/4%

Range 4:  During the period from the Closing 
          Date to April 15, 1999, the Total 
          Outstandings are equal to or greater 
          than the Threshold Amount                          1 3/8%
 
 
C.   CD Borrowing:
     ------------
 
Range 1:  The Borrowing Base Percentage is less 
          than or equal to 50%                               7/8%
 
Range 2:  The Borrowing Base Percentage is 
          greater than 50% but less than or equal to 
          75%                                                1 1/8%

Range 3:  The Borrowing Base Percentage is 
          greater than 75% and (for the period from 
          the Closing Date to April 15, 1999) the 
          Total Outstandings are less than the 
          Threshold Amount                                   1 3/8%

Range 4:  During the period from the Closing 
          Date to April 15, 1999, the Total 
          Outstandings are equal to or greater 
          than the Threshold Amount                          1 1/2%
 

provided, however, that with respect to any Eurodollar Borrowing or CD Borrowing
and except as provided in Section 2.03(d) below, if the Applicable Margin for
such Borrowing is established while the Borrowing Base Percentage is within one
of the ranges set forth above, but the 

                                      -3-
<PAGE>
 
Borrowing Base Percentage subsequently should become within one of the other
ranges set forth above during the Interest Period in effect for such Borrowing,
then (i) if, as of the Business Day (or Eurodollar Business Day) that the
Borrowing Base Percentage changes, 30 days or more remain until the termination
of such Interest Period, then the Applicable Margin for such Borrowing shall
automatically change on such Business Day (or Eurodollar Business Day) without
prior notice to Company to the Applicable Margin for the actual Borrowing Base
Percentage then in effect or (ii) if, as of the Business Day (or Eurodollar
Business Day) that the Borrowing Base Percentage changes, less than 30 days
remain until the termination of such Interest Period, then the Applicable Margin
then in effect shall not change until the termination of such Interest Period.

          "April 1997 Indenture" shall mean that certain Indenture dated as of
April 1, 1997, from Company to The Bank of New York, Trustee, pursuant to which
the securities and notes evidencing $125,000,000 of the Subordinated
Indebtedness are issued.

          "Arrangers": J. P. Morgan Securities, Inc. and NationsBanc Montgomery
Securities, LLC.

          "Assignee":  Section 13.15.

          "Assumed Amortization Schedule":  Section 5.01(a)(iii).

          "Bank" or "Banks":  The Banks identified on the signature pages
hereof, and each Assignee which becomes a Bank pursuant to Section 13.15 and
their respective successors.

          "Base Dedicated Percentage":  Section 5.06(a).

          "Beneficial Owner" shall be determined in accordance with Rules 13d-3
and 13d-5 promulgated by the Security and Exchange Commission under the
Securities Exchange Act of 1934 as it may be amended from time to time, or any
successor provision thereto, except that a Person shall be deemed to have
"beneficial ownership" of all shares that such Person has the right to acquire,
whether such right is exercisable immediately or only after the passage of time.

          "Borrowing":  Section 2.01.

          "Borrowing Base":  Section 5.01.

          "Borrowing Base Assets":  Section 5.01(a)(i).

          "Borrowing Base Deficiency":  Section 5.06(a).

          "Borrowing Base Deficiency Certificate":  Section 5.06(a).

          "Borrowing Base Percentage" shall mean, for the purpose of determining
the applicable commitment fee under Section 2.01(c) hereof or the interest rate
under Section 2.03 hereof, the Total Outstandings as a percentage of the
Borrowing Base then in effect.

                                      -4-
<PAGE>
 
          "Borrowing Base Tests" shall mean, collectively, the PV Borrowing Base
Test, the Adjusted PV Borrowing Base Test and the Cash Flow Borrowing Base Test.

          "Business Day" shall mean any day except a Saturday, Sunday or other
day on which commercial banks in New York City or Fort Worth, Texas are
authorized by law to close.

          "Capital Lease" shall mean, as of any date, any lease of property,
real or personal, which would be capitalized on a balance sheet of the lessee
prepared as of such date, in accordance with Generally Accepted Accounting
Principles, together with any other lease by such lessee which is in substance a
financing lease, including without limitation, any lease under which (i) such
lessee has or will have an option to purchase the property subject thereto at a
nominal amount or an amount less than a reasonable estimate of the fair market
value of such property as of the date such lease is entered into or (ii) the
term of the lease approximates or exceeds the expected useful life of the
property leased thereunder.

          "Capital Stock" shall mean any and all shares, interests,
participations, or equivalents (however designated) of capital stock of a
corporation and 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 Flow" shall mean for any period, (i) the gross cash operating
revenues properly allocable to Proved Reserves attributable to the Mineral
Properties (except that at least eighty-five percent (85%) of such Proved
Reserves shall consist of Proved Developed Producing Reserves) and operations of
the Gas Marketing Subsidiaries which are not subject to any Lien except
Permitted Liens, and (ii) the cash dividends and distributions projected to be
paid to Company or any Subsidiary on account of its CRT Units that are not
subject to any Lien (except as provided below), less the following cash items:
royalties, operating costs (including, with respect to the Gas Marketing
Subsidiaries, any lease or rental payments respecting the Lease Agreements),
severance and wellhead taxes, general and administrative expenses and current
income and other taxes, if any, properly allocable to such period, cash capital
expenditures made during such period, to the extent such items are properly
allocable to the Mineral Properties or such Gas Marketing Subsidiaries, and the
scheduled installments of interest due on the Loan (based upon the Projected
Interest Rate), the outstanding Permitted Margin Debt, and the Subordinated
Indebtedness during such period.  If any CRT Units are pledged to secure
outstanding Permitted Margin Debt, only the dividends and distributions
allocable to that portion of the CRT Units that have a value in excess of the
publicly traded value of the CRT Units that are necessary under any collateral
maintenance provisions to secure the Permitted Margin Debt shall be utilized in
determining the Cash Flow attributable to the CRT Units.  Cash Flow shall be
determined for the purpose of establishing the Cash Flow Borrowing Base Test
according to Section 5.01(a)(iii).

          "Cash Flow Borrowing Base Test":  Section 5.01(a)(iii).

          "Cash Flow Projections":  Section 5.03.

                                      -5-
<PAGE>
 
          "CD Advance" shall mean any principal amount under a Note with respect
to which the interest rate is calculated by reference to the Adjusted CD Rate
for a particular Interest Period.

          "CD Borrowing" shall mean any Borrowing composed of CD Advances.

          "CD Quoted Rate" shall mean, with respect to any Interest Period, the
rate of interest determined by Administrative Agent to be the arithmetic average
(rounded upward, if necessary, to the next higher 1/100 of 1%) of the prevailing
rates per annum bid at 10:00 A.M. (New York City time) (or as soon thereafter as
practicable) on the first day of such Interest Period by two or more New York
certificate of deposit dealers of recognized standing for the purchase at face
value from each Reference Bank of its certificates of deposit in an amount
comparable to the unpaid principal amount of the CD Advance of such Reference
Bank to which such Interest Period applies and having a maturity comparable to
such Interest Period.

          "CD Reserve Requirement" shall, on any day, mean that percentage
(expressed as a decimal) which is in effect on such day, as prescribed by the
Board of Governors of the Federal Reserve System (or any successor) for
determining the maximum reserve requirement (including without limitation any
basic, supplemental or emergency reserves) for a member bank of the Federal
Reserve System in New York City with deposits exceeding five billion dollars in
respect of new non-personal time deposits in dollars in New York City having a
maturity comparable to the related Interest Period and in an amount of $100,000
or more.  The Adjusted CD Rate shall be adjusted automatically on and as of the
effective date of any changes in the CD Reserve Requirement.

          "CERCLA" shall mean the Comprehensive Environmental Response,
Compensation, and Liability Act of 1980, as amended by the Superfund Amendments
and Reauthorization Act of 1986, as amended.

          "Change in Control" shall mean an occurrence where (a) any Person, or
any Persons acting together in a manner which would constitute a "group" (a
"Group") for purposes of Section 13(d) of the Securities Exchange Act of 1934 as
it may be amended from time to time, or any successor provision thereto,
together with any Affiliates thereof, (i) become the Beneficial Owners of
capital stock of the Company through a purchase, merger or other acquisition
transaction, entitling such Person or Persons and its or their Affiliates to
exercise more than 50% of the total voting power of all classes of the Company's
capital stock entitled to vote generally in the election of directors or (ii)
shall succeed in having sufficient of its or their nominees who are not
supported by a majority of the then current board of directors of the Company
elected to the board of directors of the Company such that such nominees, when
added to any existing directors remaining on the board of directors of the
Company after such election who are Affiliates of or acting in concert with any
such Persons, shall constitute a majority of the board of directors of the
Company, (b) a plan is adopted relating to the liquidation or dissolution of the
Company or (c) the Company shall consolidate with or merge into any other Person
or convey, transfer or lease its properties and assets substantially as an
entirety to any Person other than a Subsidiary, or any other Person shall
consolidate with or merge into the Company (other than, in the case of this
clause (c), pursuant to any consolidation or merger where Persons who are
Beneficial Owners of the Company's capital stock entitled to vote generally in
the election of directors 

                                      -6-
<PAGE>
 
immediately prior thereto become the Beneficial Owners of shares of capital
stock of the surviving corporation entitling such Persons to exercise more than
50% of the total voting power of all classes of such surviving corporation's
capital stock entitled to vote generally in the election of directors or persons
holding similar positions).

          "Closing Date" shall mean the date of this Loan Agreement as set forth
in the preamble hereof.

          "Collateral Documents":  Section 8.19.

          "Commitment" shall mean at any time Banks' commitment to make the Loan
and any Borrowing thereunder available to Company in an aggregate amount at any
time not to exceed the lesser of (i) the Borrowing Base then in effect or (ii)
the Facility Amount.  With respect to each Bank, its Commitment shall never
exceed its Percentage of the lesser of (i) the Borrowing Base then in effect or
(ii) the Facility Amount.  The amount of each Bank's Commitment may be
terminated or reduced from time to time in accordance with the provisions
hereof.  The initial Commitment is $365,000,000, and, upon closing of the EEX
Acquisition, the Commitment shall increase to (a) $575,000,000 if Company and
EEX do not enter into the Contingency Agreement at closing of the EEX
Acquisition or (b) $560,000,000 if Company and EEX enter into the Contingency
Agreement at closing of the EEX Acquisition but subject to further adjustment as
provided in Section 5.05(c).

          "Company":  The preamble.

          "Consequential Loss" shall, with respect to Company's payment of all
or any portion of the then-outstanding principal amount of a Bank's Eurodollar
Advance or CD Advance on a day other than the last day of the Interest Period
related thereto, mean any loss, cost or expense incurred by such Bank as a
result of the timing of such payment or in redepositing such principal amount,
including the sum of (i) the interest which, but for such payment, such Bank
would have earned in respect of such principal amount so paid, for the remainder
of the Interest Period applicable to such sum, reduced, if such Bank is able to
redeposit such principal amount so paid for the balance of such Interest Period,
by the interest earned by such Bank as a result of so redepositing such
principal amount plus (ii) any expense or penalty incurred by such Bank on
redepositing such principal amount.

          "Consolidated Current Assets" shall mean, as of any date, the current
assets which would be reflected on a consolidated balance sheet of Company and
the Subsidiaries prepared as of such date in accordance with Generally Accepted
Accounting Principles, but excluding (i) all accounts receivable in respect of
products, goods and/or services which were delivered or performed by Company or
any Subsidiary at least 90 days prior to such date (or, with respect to
receivables attributable to proceeds of production from the Mineral Properties,
periods longer than 90 days if such receivables are otherwise payable in the
ordinary course of business at periods longer than 90 days) and any notes
receivable due from any Subsidiary, (ii) Intangible Assets, and (iii) assets
held primarily for resale other than hydrocarbons severed from the Mineral
Properties in the ordinary course of business and gas and other hydrocarbons
(including by-products thereof) that are held by the Gas Marketing Subsidiaries
for resale; provided, further, Company's 

                                      -7-
<PAGE>
 
Consolidated Current Assets shall include an amount equal to the difference, if
any, between the Borrowing Base then in effect and the Total Outstandings.

          "Consolidated Current Liabilities" shall mean, as of any date, the
current liabilities which would be reflected on a consolidated balance sheet of
Company and the Subsidiaries prepared as of such date in accordance with
Generally Accepted Accounting Principles, but excluding (i) current maturities
of funded Indebtedness of Company and Subsidiaries; (ii) accrued stock
appreciation right expenses of Company, as reflected on the most recent
financial statement of such Persons which are delivered to Banks pursuant to
this Loan Agreement; and (iii) Permitted Margin Debt.

          "Contingency Agreement" shall mean the agreement that may be entered
into between Company and EEX at the closing of the EEX Acquisition, pursuant to
which, in order for EEX to satisfy a gas production imbalance arising under the
Encogen Agreements that affect certain oil and gas properties to be acquired
under the EEX Acquisition that are located in the Opelika Field area in East
Texas, the purchase price of the EEX Acquisition will be reduced by
approximately $33,000,000 and Company will grant to EEX the EEX Interest.

          "Conversion Date":  Section 2.02(c).

          "CRT Units" shall mean any publicly traded units of Cross Timbers
Royalty Trust.

          "CT Energy" shall mean Cross Timbers Energy Services, Inc., a Texas
corporation, and a Subsidiary of Company.

          "CT Operating" shall mean Cross Timbers Operating Company, a Texas
corporation, and a Subsidiary of Company.

          "Determination Date" shall mean each June 30.

          "Dividends", in respective of any corporation, shall mean:

               (1)  Cash distributions or any other distributions on, or in
                    respect of, any class of capital stock of such corporation,
                    except for distributions made solely in shares of stock of
                    the same class: and

               (2)  Any and all funds, cash or other payments in respect of the
                    redemption, repurchase or acquisition of such stock, unless
                    such stock shall be redeemed or acquired through the
                    exchange of such stock with stock of the same class.

          "Documentation Agent": The preamble, and as otherwise provided in
Article 11.

          "Dollars" and the sign "$" shall mean lawful currency of the United
States of America.

          "EEX" shall mean, collectively, EEX Operating L.P. and EEX
Corporation.

                                      -8-
<PAGE>
 
          "EEX Acquisition" shall mean the acquisition transaction to be
consummated pursuant to that certain Purchase and Sale Agreement dated February
12, 1998 between EEX, as Seller, and Company, as Buyer.

          "EEX Properties" shall mean the oil and gas properties to be acquired
by Company upon closing of the EEX Acquisition.

          "EEX Interest" shall mean the interest in the gas production from the
Opelika Field properties expected to commence January 1, 2002 that will be
conveyed to EEX by Company pursuant to the Contingency Agreement.  The EEX
Interest will not be perpetual and will terminate at the end of a stated term or
upon Company's delivery of certain volumes of gas to EEX pursuant to the EEX
Interest.

          "Encogen Agreements" shall mean, collectively, (i) that certain
Balancing and Delivery Agreement dated February 29, 1988 between EP Operating
Company and Encogen One Partners, Ltd., and (ii) that certain Assignment and
Conveyance from EP Operating Company to Encogen One Partners, Ltd., both of
which concern the production and delivery of gas from the Opelika Field
properties to be conveyed to Company pursuant to the EEX Acquisition.

          "Environmental Laws" shall mean CERCLA, RCRA and any other applicable
laws, statutes, regulations, judicial interpretations, ordinances, rules,
orders, decrees, permits, concessions, grants, franchises, licenses, agreements
or other government restriction of the United States or any state where the
Mineral Properties are located or any other Governmental Authority having
jurisdiction over Company or the Subsidiaries or any of their respective
properties or assets, pertaining to health or the environment, as they now exist
or are hereafter enacted and/or amended, including, without limitation, those
matters relating to the emissions, discharges or releases of pollutants,
contaminants, petroleum or petroleum products, chemicals or industrial, toxic or
hazardous substances or wastes into the environment including, without
limitation, ambient air, surface water, ground water, or land, or otherwise
relating to the manufacture, processing, distribution, use, treatment, storage,
disposal, transport or handling of pollutants, contaminants, petroleum or
petroleum products, chemicals or industrial, toxic or hazardous substances or
wastes or the clean-up or other remediation thereof.

          "ERISA" shall mean the Employee Retirement Income Security Act of
1974, as amended, together with all regulations issued pursuant thereto.

          "Eurodollar Advance" shall mean any principal amount under a Note with
respect to which the interest rate is calculated by reference to the Adjusted
Interbank Rate for a particular Interest Period.

          "Eurodollar Borrowing" shall mean any Borrowing composed of Eurodollar
Advances.

          "Eurodollar Business Day" shall mean a Business Day on which dealings
in Dollars are carried out in the London interbank market.

                                      -9-
<PAGE>
 
          "Eurodollar Reserve Percentage" shall mean, for any day, that
percentage (expressed as a decimal) which is in effect on such day, as
prescribed by the Board of Governors of the Federal Reserve System (or any
successor) for determining the maximum reserve requirement for a member bank of
the Federal Reserve System in New York City with deposits exceeding five billion
dollars in respect of "Eurocurrency liabilities" (or in respect of any other
category of liabilities which includes deposits by reference to which the
interest rate on Eurodollar Advances is determined or any category of extensions
of credit or other assets which includes loans by a non-United States office of
any Bank to United States residents).

          "Event of Default":  Article 10.

          "Excess Interest Amount":  Section 4.03(b).

          "Facility Amount" shall mean, on any date, $750,000,000.

          "FDIC Percentage" shall mean for any Interest Period the net annual
assessment rate (rounded upwards, if necessary, to the next higher 1/100 of 1%)
actually incurred by Morgan Guaranty Trust Company of New York to the Federal
Deposit Insurance Corporation (or any successor) for such Corporation's (or such
successor's) insuring time deposits at offices of Morgan Guaranty Trust Company
of New York in the United States during the most recent period for which such
rate has been determined prior to the commencement of such Interest Period.

          "Federal Funds Rate" means, for any day, the rate per annum (rounded
upwards, if necessary, to the nearest 1/100th of 1%) equal to the weighted
average of the rates on overnight federal funds transactions with members of the
Federal Reserve System arranged by federal funds brokers on such day, as
published by the Federal Reserve Bank of New York on the Business Day next
succeeding such day, provided that (i) if such day is not a Business Day, the
Federal Funds Rate for such day shall be such rate on such transactions on the
next preceding Business Day as so published on the next succeeding Business Day
and (ii) if no such rate is so published on such next succeeding Business Day,
the Federal Funds Rate for such day shall be the average rate quoted to Morgan
Guaranty Trust Company of New York on such day on such transactions as
determined by Administrative Agent.

          "Floating Base Advance" shall mean any principal amount under a Note
with respect to which the interest rate is calculated by reference to the
Floating Base Rate.

          "Floating Base Borrowing" shall mean any Borrowing composed of
Floating Base Advances.

          "Floating Base Rate" shall mean, for any day, a rate per annum equal
to the higher of (i) the Prime Rate for such day or (ii) the sum of 1/2 of 1%
plus the Federal Funds Rate for such day.

          "Gas Marketing Subsidiary" shall mean (i) Ringwood, (ii) CT Energy,
(iii) Timberland, and (iv) any other Subsidiary of Company whose assets,
business or operations consists 

                                      -10-
<PAGE>
 
primarily of gas gathering and transmission pipelines and/or the sale, resale,
transportation, processing and marketing of natural gas and by-products thereof.

          "Gas Report" means a report delivered by Company to Banks pursuant to
Section 5.03, Section 5.04 or Section 8.01(d).

          "Gas Subsidiaries' Loan Value":  Section 5.01(a)(i).

          "Generally Accepted Accounting Principles" shall mean those generally
accepted accounting principles and practices which are recognized as such by the
American Institute of Certified Public Accountants acting through its Accounting
Principles Board or by the Financial Accounting Standards Board or through other
appropriate boards or committees thereof and which are consistently applied for
all periods after the date hereof so as to properly reflect the financial
condition, and the results of operations and changes in financial position, of
Company and the Subsidiaries, except that any accounting principle or practice
required to be changed by the said Accounting Principles Board or Financial
Accounting Standards Board (or other appropriate board or committee of the said
Boards) in order to continue as a generally accepted accounting principle or
practice may so be changed on or as of the date such change is adopted.

          "Governmental Authority" shall mean any government (or any political
subdivision or jurisdiction thereof), court, bureau, agency or other
governmental authority having jurisdiction over Company or any Subsidiary or any
of its or their business, operations or properties.

          "Guaranty" of any Person shall mean any contract, agreement or
understanding of such Person pursuant to which such Person guarantees, or in
effect guarantees, any Indebtedness of any other Person (the "Primary Obligor")
in any manner, whether directly or indirectly, including without limitation
agreements:

          (1) to purchase such Indebtedness or any property constituting 
security therefor;

          (2) to advance or supply funds (a) for the purchase or payment of such
Indebtedness, or (b) to maintain working capital or other balance sheet
conditions, or otherwise to advance or make available funds for the purchase or
payment of such Indebtedness;

          (3) to purchase property, securities or services primarily for the
purpose of assuring the holder of such Indebtedness of the ability of the
Primary Obligor to make payment of the Indebtedness; or

          (4) otherwise to assure the holder of the Indebtedness of the Primary
Obligor against loss in respect thereof; except that "Guaranty" shall not
include the endorsement by Company or a Subsidiary in the ordinary course of
business of negotiable instruments or documents for deposit or collection.

          "Hedge Agreement" shall mean any commodity pricing agreement, forward
sale, "price swap" agreement or commodity rate-shifting agreement or similar
agreement or contractual relationship between Company or any Subsidiary and any
Person (including any Bank) pursuant 

                                      -11-
<PAGE>
 
to which Company holds a position in the price of any quantity of crude oil,
natural gas or other hydrocarbons to be produced from the Mineral Properties
such that the price derived from the first sale of any quantity of oil, gas or
other hydrocarbons produced from the Mineral Properties is established prior to
the actual production of such oil, gas or other hydrocarbons; provided, however,
that a Hedge Agreement shall not include any monthly spot sales of Company's gas
production from the Mineral Properties that occur in the ordinary course of its
business. A Hedge Agreement shall also include the option of Company or any
Subsidiary to buy or sell a Hedge Agreement.

          "Indebtedness" with respect to any Person shall mean as of any date,
all liabilities and contingent liabilities which would be reflected on a balance
sheet and related notes thereto of such Person prepared as of such date in
accordance with Generally Accepted Accounting Principles, including without
limitation: (i) all obligations for money borrowed; (ii) all obligations under
conditional sale or other title retention agreements and all obligations issued
or assumed as full or partial payment for property, whether or not any such
obligations represent obligations for borrowed money; (iii) all indebtedness
secured by a lien existing on property owned or acquired by such Person subject
to any such lien, whether or not the obligations secured thereby shall have been
assumed; (iv) all obligations, direct or indirect, to any joint venture,
partnership or other entity of which such Person is a member; (v) all
obligations under any Guaranty, note purchase agreement and other document
having similar effect; (vi) all obligations for accounts payable or trade
credit; (vii) indebtedness of any joint venture, partnership or other Person for
which such Person is directly or indirectly liable; (viii) all obligations under
any Capital Lease, operating lease or any other leases only to the extent such
leases would be treated as indebtedness in accordance with Generally Accepted
Accounting Principles; (ix) all obligations under an Interest Swap Agreement;
and (x) all obligations under a Hedge Agreement.

          "Intangible Assets" of any Person shall mean those assets of such
Person which are (i) deferred assets, other than prepaid insurance and prepaid
taxes; (ii) patents, copyrights, trademarks, trade names, franchises, goodwill,
experimental expenses and other similar assets which would be classified as
intangible assets on a balance sheet of such Person, prepared in accordance with
Generally Accepted Accounting Principles; (iii) unamortized debt discount and
expense; and (iv) assets located, and notes and receivables due from obligors
domiciled, outside of the United States of America.

          "Interbank Offered Rate" shall mean, with respect to each Interest
Period, the average (rounded upward, if necessary, to the next higher 1/16 of
1%) of the respective rates per annum at which deposits in dollars are offered
to  each of the Reference Banks in the London interbank market at approximately
11:00 A.M. (London time) two Business Days before the first day of such Interest
Period in an amount approximately equal to the principal amount of the
Eurodollar Advance of such Reference Banks to which such Interest Period is to
apply and for a period of time comparable to such Interest Period.

          "Interest Period" shall mean, with respect to a Eurodollar Advance 
or CD Advance, a period commencing:

                                      -12-
<PAGE>
 
          (i)   on the borrowing date of such Eurodollar Advance or CD Advance
made pursuant to Section 2.01 of this Loan Agreement; or

          (ii)  on the Conversion Date pertaining to such Eurodollar Advance or
CD Advance, if such Eurodollar Advance or CD Advance is made pursuant to a
conversion as described in Section 2.02(c) hereof; or

          (iii) on the date of borrowing specified in the Request for Borrowing
in the case of a rollover to a successive Interest Period,

and ending one, two, three or six months thereafter (in the case of a Eurodollar
Advance), or 30, 60, 90 or 180 days thereafter (in the case of a CD Advance) as
Company shall elect in accordance with Section 2.02(c) of this Loan Agreement;
provided, that:

          (A) any Interest Period which would otherwise end on a day which is
not a Business Day (or in the case of a Eurodollar Advance, a Eurodollar
Business Day) shall be extended to the next succeeding Business Day or
Eurodollar Business Day (as the case may be) unless, in the case of a Eurodollar
Advance, such Eurodollar Business Day falls in another calendar month in which
case such Interest Period shall end on the next preceding Eurodollar Business
Day;

          (B) in the case of a Eurodollar Advance, any Interest Period which
begins on the last Eurodollar Business Day of a calendar month (or on a day for
which there is no numerically corresponding day in the calendar month or at the
end of such Interest Period) shall, subject to clause (A) above, end on the last
Eurodollar Business Day of a calendar month;

          (C) if the Interest Period for any Eurodollar Advance or CD Advance
would otherwise end after the Maturity Date, such Interest Period shall end on
the Maturity Date; and

          (D) If (i) certificates of deposit are bid by two or more New York
certificate of deposit dealers of recognized standing for the purchase at face
value from each Reference Bank of its certificates of deposit having maturities
longer than the Interest Periods set forth above for a CD Advance, or (ii)
deposits in dollars are offered to each of the Reference Banks in the London
interbank market for periods of time which are longer than the Interest Periods
set forth above for a Eurodollar Advance, then, subject to the approval of all
Banks, longer Interest Periods shall be made available to Company for such CD
Advances and Eurodollar Advances which are identical to the longer maturities of
certificates of deposit or deposits in dollars as set forth above, but such
longer Interest Periods shall be further subject to subclauses (A), (B) and (C)
immediately above.

          "Interest Swap Agreement" shall mean an agreement between Company and
any Person (including any Bank) pursuant to which, with the intent to protect
against fluctuations in interest rates or the exchange of notional interest
obligations, either generally or under certain circumstances, such Persons agree
to exchange a series of cash flows or revenues measured by different interest
rates, and includes agreements providing for the exchange of a fixed rate of
interest for a floating rate of interest and vice versa, one floating rate of
interest for another 

                                      -13-
<PAGE>
 
floating rate of interest or fixed rate of interest in one currency for a
floating rate of interest in another currency.

          "Investment" in any Person shall mean any investment, whether by means
of share purchase, loan, advance, extension of credit, capital contribution or
otherwise, in or to such Person, the Guaranty of any Indebtedness of such
Person, or the subordination of any claim against such Person to other
Indebtedness of such Person.

          "Lease Agreements" shall mean the documents evidencing (i) the
equipment and facilities lease transaction among Timberland, as Lessee,
NationsBank Leasing Corporation and BancBoston Leasing Investment, Inc., as
Owner Participants, and Wilmington Trust Company, Trustee, as Lessor, pursuant
to which Timberland leases its Tyrone gas processing plant and related gas
gathering facilities and systems and (ii) the equipment and facilities lease
transaction among Ringwood, as Lessee, NationsBank Leasing Corporation and Banc
One Leasing Corporation, as Owner Participants, and Wilmington Trust Company,
Trustee, as Lessor, pursuant to which Ringwood leases its gas gathering facility
in Major County, Oklahoma.

          "Lien" shall mean any lien, mortgage, security interest, tax lien,
pledge, encumbrance, conditional sale or title retention arrangement, or any
other interest in property designed to secure the repayment of Indebtedness,
whether arising by agreement or under any statute or law, or otherwise.

          "Loan" shall mean the Revolving Credit Loans.

          "Loan Agreement":  The preamble.

          "Loan Papers" shall mean this Loan Agreement, the Notes (including any
renewals, extensions and refundings thereof), the Guaranties of the Gas
Marketing Subsidiaries, and any agreements, certificates or documents (and with
respect to this Loan Agreement, and such other agreements and documents, any
amendments or supplements thereto or modifications thereof) executed or
delivered pursuant to the terms of this Loan Agreement.  Loan Papers also
include any Collateral Documents executed by Company and the Gas Marketing
Subsidiaries pursuant to Section 8.19 hereof.

          "Majority Banks" shall mean, at any time, Banks holding Notes
representing at least fifty-one percent (51.00%) of the aggregate unpaid
principal amount of the Loan, or if no Loans are at the time outstanding, Banks
having at least fifty-one percent (51.00%) of the Commitment.

          "Material Adverse Effect" means any circumstance or event which (i)
would have or has had any adverse effect whatsoever upon the validity or
enforceability of any Loan Papers, (ii) is or would be material and adverse to
the financial condition or business operations of Company or any Subsidiary,
taken as a whole (iii) has impaired or would impair the ability of Company to
perform any of its material Obligations or substantially all of its Obligations
under the Loan Papers, or (iv) causes an Event of Default or any event which,
with notice or lapse of time or both, would become an Event of Default.

                                      -14-
<PAGE>
 
          "Maturity Date: shall mean June 30, 2003.

          "Maximum Rate" shall mean, on any day, the highest nonusurious rate of
interest (if any) permitted by applicable law on such day.  Banks hereby notify
Company that, and disclose to Company that, for purposes of Chapter 303 of the
Texas Finance Code, as supplemented by Texas Credit Title, as it may from time
to time be amended, the applicable ceiling shall be the "weekly ceiling" from
time to time in effect as specified in such Chapter 303; provided, however, that
to the extent permitted by applicable law, Banks reserve the right to change the
applicable ceiling from time to time by further notice and disclosure to
Company; and, provided further, that the "highest nonusurious rate of interest
permitted by applicable law" for purposes of this Loan Agreement and the Notes
shall not be limited to the applicable ceiling under the Texas Finance Code, as
supplemented by Texas Credit Title, if federal laws or other state laws now or
hereafter in effect and applicable to this Loan Agreement, and the Notes (and
the interest contracted for, charged and collected hereunder or thereunder)
shall permit a higher rate of interest.

          "Mineral Properties" shall mean, as of any date, Company's interest in
and to (i) oil, gas and/or mineral leases, royalty and overriding royalty
interests, production payments, net profits interests and mineral fee interests,
(ii) unitization, communitization and pooling arrangements (and all properties
covered and units created thereby), whether arising by contract or operation of
law, which include all or any part of the foregoing, (iii) lands subject to any
of the foregoing, (iv) equipment, fixtures, rights-of-way, easements, goods,
chattels, accounts, accounts receivable, contract rights, chattel paper, general
intangibles, and other items of personal property related to, located on or used
in connection with the foregoing; (v) processing facilities, pipelines, salt
water disposal wells and facilities, transportation rights and facilities, and
other equipment, machinery, rights or facilities related to or used in
connection with the marketing, transporting, producing, processing, or gathering
of oil, gas or hydrocarbons.  Upon Company's acquisition of the EEX Properties,
the EEX Properties shall be deemed Mineral Properties.  Upon formation of the
Proposed Royalty Trust, Mineral Properties shall include Company's ownership
interest in the units of the Proposed Royalty Trust, but Company's interest in
such Mineral Properties that are evidenced by units in the Proposed Royalty
Trust (for the purpose of determining the Borrowing Base) shall be
proportionately reduced by a percentage, the numerator of which is the number of
units of the Proposed Royalty Trust that are not owned by Company and the
denominator of which is the total number of units issued and outstanding for the
Proposed Royalty Trust.  Mineral Properties shall not include beneficial
ownership interests in oil and gas royalty interests or other oil and gas
interests attributable to CRT Units or Non-CT Royalty Trust Units.

          "Net Revenue" shall mean for each Reference Period shall mean the
remainder of (i) all cash proceeds received by Company or any Gas Marketing
Subsidiary during such Reference Period on account of (a) the sale of oil, gas
and/or other mineral production received by Company or any Gas Marketing
Subsidiary for the Reference Period and attributable to the Mineral Properties
and/or the business and operations of the Gas Marketing Subsidiaries; (b) the
processing, transporting, gathering or marketing of oil, gas and/or mineral
production received by Company or any Gas Marketing Subsidiary for the Reference
Period and attributable to the Mineral Properties and/or the business and
operations of the Gas Marketing Subsidiaries; (c) fees for the disposal of salt
water (or similar liquid) on the Mineral Properties received by Company 

                                      -15-
<PAGE>
 
for the Reference Period, (d) settlement, buy-out, compromise or renegotiation
of any gas purchase or sales contract which affects any of the Mineral
Properties, (e) amounts received by Company during such Reference Period on
account of any Hedge Agreement, and (f) the cash dividends and distributions
projected to be paid to Company or any Subsidiary during such Reference Period
on account of its CRT Units and its units in the Proposed Royalty Trust minus
(i) the actual cash payments made by Company or any Gas Marketing Subsidiary
during such Reference Period on account of the operating expenses attributable
to the Mineral Properties and/or the business and operations of the Gas
Marketing Subsidiaries, including without limitation, [w] taxes, other than
franchise taxes, [x] normal leasehold operator's expenses charged by third party
operators, including overhead expenses of third party operators which are
allowed as operating expenses pursuant to relevant operating agreements, [y]
with respect to the Mineral Properties operated by Company or an Affiliate of
Company, such expenses charged by Company or its Affiliate which are allowed as
"Direct Charges" under the Accounting Procedure recommended by the Council of
Petroleum Accountant Societies and [z] amounts paid by Company on account of any
Hedge Agreement and (ii) the payments of interest made by Company during such
Reference Period for scheduled installments of interest due on the Subordinated
Indebtedness, but only to the extent that such payments of interest are
permitted according to the April 1997 Indenture and/or the October 1997
Indenture and payments made by Company or any Subsidiary during such Reference
Period on any Permitted Margin Debt that is secured by any CRT Units.

     "Non-CT Royalty Trust Units" shall mean any units of beneficial or direct
ownership in any royalty trust other than CRT Units or the Proposed Royalty
Trust.

     "Notes" shall mean the Notes executed by Company and delivered to Banks
pursuant to the terms of this Agreement, together with any renewals, extensions
or modifications thereof.  "Note" shall mean any of the Notes.

     "Obligation" shall mean all present and future indebtedness, obligations,
and liabilities of Company to Banks or any of them, and all renewals and
extensions thereof, or any part thereof, arising pursuant to this Loan Agreement
or represented by the Notes, and all interest accruing thereon, and attorneys'
fees incurred in the enforcement or collection thereof, regardless of whether
such indebtedness, obligations and liabilities are direct, indirect, fixed,
contingent, joint, several or joint and several; together with all indebtedness,
obligations and liabilities of Company evidenced or arising pursuant to any of
the other Loan Papers, and all renewals and extensions thereof, or part thereof
or any Interest Swap Agreement between Company and any Bank or Banks that
involves the swap or exchange of interest rates under this Loan Agreement or any
Hedge Agreement between Company and any Bank or Banks.

     "October 1997 Indenture" shall mean that certain Indenture dated as of
October 28, 1997 from Company to The Bank of New York, Trustee, pursuant to
which the securities and notes evidencing $175,000,000 of the Subordinated
Indebtedness are issued.

     "Other Taxes":  Section 4.08.

     "Participant":  Section 13.15.

                                      -16-
<PAGE>
 
     "PBGC" shall mean the Pension Benefit Guaranty Corporation, and any
successor to all or any of the Pension Benefit Guaranty Corporation's functions
under ERISA.

     "Percentage" shall mean, with respect to any Bank, such Bank's
proportionate share of the Commitment in effect from time to time, as set forth
in Schedule I hereto.

     "Permitted Liens" shall mean, as of any date: (i) pledges or deposits made
to secure payment of worker's compensation (or to participate in any fund in
connection with worker's compensation), unemployment insurance, pensions or
social security programs; (ii) contractual liens for the benefit of operators of
the Mineral Properties, but only to the extent that such operators are not
asserting a claim or right to exercise their rights under such contractual
liens, except for such claims and rights of operators which Company contests in
good faith and for which adequate reserves are maintained according to Generally
Accepted Accounting Principles; (iii) liens imposed by mandatory provisions of
law such as for materialmen's, mechanic's, warehousemen's and other like liens
arising in the ordinary course of business; (iv) liens for taxes, assessments
and governmental charges or levies imposed upon a Person or upon such Person's
income or profits or property, if the same are not yet due and payable or if the
same are being contested in good faith and as to which adequate reserves have
been provided; (v) good faith deposits in connection with tenders, leases, real
estate bids or contracts (other than contracts involving the borrowing of
money), pledges or deposits to secure public or statutory obligations, deposits
to secure (or in lieu of) surety, stay, appeal or customs bonds and deposits to
secure the payment of taxes, assessments, customs duties as other similar
charges; (vi) encumbrances consisting of zoning restrictions, easements, or
other restrictions on the use of real property, provided that such do not impair
the use of real property for the uses intended, and none of which is violated in
any material respect by existing or proposed structures or land use; (vii) the
terms and provisions of the leases, assignments, unit agreements and other
instruments of conveyance or transfer applicable to or affecting the Mineral
Properties; (viii) the terms and provisions of the assignments and other title
transfer documents under which Comany acquired the Mineral Properties including
any right retained by a predecessor in title of Company to purchase hydrocarbons
produced therefrom; (ix) any inconsequential, insignificant or immaterial liens
or encumbrances against any Mineral Property which does not interfere with or
impair Company's ownership of, or right or ability to receive proceeds of
production from, such property, and which, singularly or collectively with other
inconsequential, insignificant or immaterial liens or encumbrances, do not
result in a Material Adverse Effect on Company or any Subsidiary, (x) the Liens
granted by Timberland to third-party lessors covering its compressor station and
interconnect facility, pursuant to certain lease agreements between Timberland
and such lessors, (xi) Liens granted pursuant to the Lease Agreements, (xii)
Liens against Investments of Company or its Subsidiaries that are Capital Stock
in publicly traded companies engaged primarily in the oil and gas industry, CRT
Units and Non-CT Royalty Trust Units that are pledged to secure Permitted Margin
Debt, (xiii) any Lien not otherwise included in subclauses (x) or (xi) above
that is granted by Company or a Subsidiary under any equipment lease agreement
in which Company or a Subsidiary is a lessee up to an aggregate face amount for
all of such equipment lease agreements of $5,000,000 during any calendar year,
(xiv) the Contingency Agreement, (xv) the Encogen Agreements, (xvi) the
Collateral Documents, and (xvii) any other liens or encumbrances to which
Majority Banks agree in writing.

                                      -17-
<PAGE>
 
     "Permitted Margin Debt" shall mean Indebtedness of Company and its
Subsidiaries that is secured by Capital Stock in publicly traded companies
engaged primarily in the oil and gas industry, CRT Units and Non-CT Royalty
Trust Units that are owned by Company and its Subsidiaries up to an aggregate
amount at any one time outstanding of (i) $25,000,000 plus (ii) that unused or
available portion of the Indebtedness permitted by subclause (xi) of Section
9.01 hereof that is secured by Capital Stock in publicly traded companies
engaged primarily in the oil and gas industry, CRT Units and Non-CT Royalty
Trust Units that are owned by Company and its Subsidiaries.

     "Person" shall include an individual, a corporation, a joint venture, a
partnership, a trust, an unincorporated organization or a government or any
agency or political subdivision thereof.

     "Plan" shall mean an employee benefit plan or other plan maintained by
Company for employees of Company and/or its Subsidiaries and covered by Title IV
of ERISA, or subject to the minimum funding standards under Section 412 of the
Internal Revenue Code of 1954, as amended.

     "Present Value of Borrowing Base Reserves":  Section 5.01 (a)(i).

     "Prime Rate" means the rate of interest publicly announced by Morgan
Guaranty Trust Company of New York in New York City from time to time as its
Prime Rate.

     "Prior Loan Agreement" shall mean that certain Revolving Credit Agreement
dated as of November 21, 1997 by and among Company, Morgan Guaranty Trust
Company of New York, as Administrative Agent, NationsBank of Texas, N. A., as
Syndication Agent, and the other lenders parties thereto.

     "Production Profile" shall mean the projected rates of production,
projected declines in production, the percentage of oil or gas production to the
total of all production of oil or gas, and other elements, characteristics, or
components of or respecting the production, recovery or projected production or
recovery of oil or gas attributable to the Proved Reserves of the Mineral
Properties, as set forth in the Reserve Reports covering the Mineral Properties
which were utilized in determining the initial Borrowing Base hereunder.

     "Projected Interest Rate" shall mean, for purposes of determining the Cash
Flow Projections as of the date of determining any such projections, a rate per
annum equal to the weighted average applicable rate of interest payable by
Company on all outstanding Indebtedness (exclusive of the Subordinated
Indebtedness) during the most recently ended period of 30 consecutive calendar
days, or, if no such Indebtedness is outstanding, the rate of interest which
would then be applicable for a Eurodollar Advance, in the amount of $5,000,000,
with an Interest Period of one month.

     "Proposed Royalty Trust" shall mean, collectively, one or more royalty
trusts to be formed by Company, pursuant to which Company shall assign and
convey to such royalty trusts a 75% net profits interest in primarily leasehold
Mineral Properties owned by Company in the 

                                      -18-
<PAGE>
 
Hugoton Field in Kansas and Oklahoma, in the San Juan Basin in New Mexico, in
the Green River Basin in Wyoming and in such other Mineral Properties as may be
selected by Company. Initially, all beneficial units representing ownership of
the Proposed Royalty Trust will be owned and held by Company. The Proposed
Royalty Trust is further described in Section 5.05(b). Company estimates that
the Borrowing Base value of the Mineral Properties to be conveyed to the
Proposed Royalty Trust will not exceed approximately $200,000,000 in the
aggregate.

     "Proved Developed Producing Reserves" shall have the meaning assigned to
that term by the Society of Petroleum Engineers, as it may be amended from time
to time, but generally shall mean the subcategory of "Proved Developed Reserves"
(as defined by the Society of Petroleum Engineers) which are recoverable from
the completion intervals currently open and producing to market.  Additional oil
and gas expected to be obtained through the application of fluid injection or
other improved recovery techniques for supplementing the natural forces and
mechanisms of primary recovery will be included as "Proved Developed Producing
Reserves" only after the operation of an installed program has confirmed through
production response through existing completions producing to market that
increased recovery will be achieved.  Proved Developed Producing Reserves shall
not include any Proved Developed Non-Producing Reserves.

     "Proved Developed Non-Producing Reserves" shall have the meaning assigned
to that term by the Society of Petroleum Engineers, as it may be amended from
time to time, but generally shall mean the subcategory of "Proved Developed
Reserves" (as defined by the Society of Petroleum Engineers) which will become
"Proved Developed Producing Reserves" upon minor capital expenditures being made
with respect to existing wells which will cause formerly non-producing
completions or intervals to become open and producing to market.

     "Proved Reserves" means and includes Proved Developed Producing Reserves,
Proved Developed Non-Producing Reserves and Proved Undeveloped Reserves.

     "Proved Undeveloped Reserves" shall have the meaning assigned to that term
by the Society of Petroleum Engineers, as it may be amended from time to time,
but generally shall mean those reserves that are expected to be recovered from
new wells on undrilled acreage, or from existing wells where a relatively major
expenditure is required for recompletion.  Proved Undeveloped Reserves on
undrilled acreage shall be limited to those drilling units offsetting productive
units that are reasonably certain of production when drilled.  Proved
Undeveloped Reserves for other undrilled units can be claimed only where it can
be demonstrated with certainty that there is continuity of production from the
existing productive formation.  Under no circumstances should estimates for
Proved Undeveloped Reserves be attributable to any acreage for which an
application of fluid injection or other improved recovery technique is
contemplated, unless such techniques have been proved effective by actual tests
in the area and in the same reservoir.

     "PV Borrowing Base Test":  Section 5.01(a)(i).

     "Quarterly Period" shall mean each three-month period(s) commencing on the
first day of January, April, July and October, and ending on the last day of
each March, June, September and December, respectively.

                                      -19-
<PAGE>
 
     "RCRA" shall mean the Resource Conservation and Recovery Act of 1976, as
amended by the Used Oil Recycling Act of 1980, the Hazardous and Solid Waste
Disposal Act Amendments of 1984 and the Hazardous and Solid Waste Amendments of
1984.

     "Reference Banks" shall mean Morgan Guaranty Trust Company of New York and
NationsBank of Texas, N.A., and with respect to a Eurodollar Borrowing,
Reference Banks shall refer to the principal London office, if any, of any
Reference Bank or their respective Affiliates.

     "Regulation D" shall mean Regulation D of the Board of Governors of the
Federal Reserve System from time to time in effect and shall include any
successor or other regulation relating to reserve requirements applicable to
member banks of the Federal Reserve System.

     "Regulation U" shall mean Regulation U promulgated by the Board of
Governors of the Federal Reserve System, 12 C.F.R. Part 221, or any other
regulation hereafter promulgated by said Board to replace the prior Regulation U
and having substantially the same function.

     "Regulation X" shall mean Regulation X promulgated by the Board of
Governors of the Federal Reserve System, 12 C.F.R. Part 224, or any other
regulation hereafter promulgated by said Board to replace the prior Regulation X
and having substantially the same function.

     "Reportable Event" shall have the meaning assigned to that term in Title IV
of ERISA.

     "Request for Borrowing":  Section 2.02(a).

     "Reserve Base" shall mean the type, character, location, field and nature
of ownership of the oil and gas leases, overriding royalty interests, mineral
interests, royalty interests, net profits interests, production payments and
other oil, gas and/or mineral interests or properties which comprise the Mineral
Properties, and the working interests and net revenue interests of Company in
and to the Mineral Properties, as set forth in the Reserve Reports for the
Mineral Properties which were utilized in determining the initial Borrowing Base
hereunder.

     "Reserve Report" means a report delivered by Company pursuant to Section
5.03, Section 5.04 or Section 8.01(c).

     "Revolving Credit Loans":  Section 2.01(a).

     "Ringwood" shall mean Ringwood Gathering Company, a Delaware corporation,
and a Subsidiary of Company.

     "Rollover Notice":  Section 2.02(c).

     "Scheduled Installment":  Section 5.06(a).

     "Speculative Trading" shall mean the holding by Company or any Subsidiary
of a position in, or forward sale respecting, any derivative or commodity
transaction, excluding any 

                                      -20-
<PAGE>
 
transaction respecting the physical sale, storage, transportation or marketing
of oil, gas or other hydrocarbons produced from the Mineral Properties, the
hedging of Company's position in oil, gas or other hydrocarbons produced from
the Mineral Properties or any portion thereof pursuant to a Hedge Agreement, but
only to the extent that such Hedge Agreement is permitted under Section 9.18
hereof, or any gas storage transaction entered into by any Gas Marketing
Subsidiary in the ordinary course of its business. Speculative Trading shall
also include any Interest Swap Agreement that is entered into for speculative
purposes and not for the purpose of protecting against fluctuations in interest
rates or the exchange of notional obligations, either generally or under
specific circumstances.

     "Subordinated Indebtedness" shall mean, collectively, the Indebtedness
evidenced by (i) the 9 1/4% Series A Senior Subordinated Notes and Series B
Senior Subordinated Notes, due April 1, 2007, in the aggregate principal amount
of $125,000,000, which have been issued pursuant to the April 1997 Indenture,
and (ii) the 8 3/4% Series A Senior Subordinated Notes and Series B Senior
Subordinated Notes due November 1, 2009, in the aggregate principal amount of
$175,000,000, which have been issued pursuant to the October 1997 Indenture.

     "Subsidiary" or "Subsidiaries" shall mean CT Energy, CT Operating,
Timberland, Ringwood, WTW Properties, Inc., a Texas corporation, Cross Timbers
Trading Company, a Texas corporation, and any and all other corporations,
partnerships, joint ventures, business trusts or other legal entities in which
Company, either directly or indirectly through one or more intermediaries, owns
or holds beneficial or record ownership of a majority of the outstanding voting
securities or equity interests therein.

     "Supplemental Borrowing Base Deficiency Certificate":  Section 5.06(b).

     "Syndication Agent":  The preamble, and as otherwise provided in Article
11.

     "Taxes":  Section 4.08.

     "Temporary Cash Investment" shall mean any Investment in (i) direct
obligations of the United States of America or any agency thereof, or
obligations fully guaranteed by the United States of America or any agency
thereof, provided that such obligations mature within 360 days of the date of
acquisition thereof, (ii) commercial paper rated in the highest grade by two or
more national credit rating agencies and maturing not more than 270 days from
the date of creation thereof, and (iii) time deposits with, and certificates of
deposit and banker's acceptances issued by, any United States bank having
capital surplus and undivided profits aggregating at least $1,000,000,000.

     "Threshold Amount" shall mean, at any time during the period between the
Closing Date to April 15, 1999, the lesser of (A) the amount determined under
the PV Borrowing Base Test or (B) the amount equal to the remainder of (i) the
quotient of (a) the Present Value of Borrowing Base Reserves that are
attributable to the Proved Reserves allocable to the Borrowing Base Assets
(provided that at least eighty-five percent (85%) of such Proved Reserves shall
consist of Proved Developed Producing Reserves) plus the Gas Subsidiaries' Loan
Value divided by (b) 1.35, less (ii) the unpaid principal balance of the
Subordinated Indebtedness then outstanding.  At 

                                      -21-
<PAGE>
 
the Closing Date, the Threshold Amount is $312,000,000. Upon closing of the EEX
Acquisition, the Threshold Amount shall be (a) $543,000,000 if Company and EEX
do not enter into the Contingency Agreement or (b) $525,000,000 if Company and
EEX enter into the Contingency Agreement but subject to further adjustment as
provided in Section 5.05(c). During the period between the Closing Date to April
15, 1999, the Threshold Amount shall be determined (and approved by Majority
Banks) as provided in Section 2.03(d) hereof and upon each redetermination of
the Borrowing Base.

     "Timberland" shall mean Timberland Gathering & Processing Company, Inc., a
Texas corporation, and a Subsidiary of Company.

     "Total Outstandings" shall mean, at any date, the aggregate of the
principal amount of, and accrued interest which is overdue and unpaid in respect
of, the Loan.

     "Trustee" shall mean the Trustee under the April 1997 Indenture and/or the
October 1997 Indenture, including any successor trustee designated pursuant to
the April 1997 Indenture and/or the October 1997 Indenture.

     Other Definitional Provisions.

          (a) All terms defined in this Loan Agreement shall have the above-
defined meanings when used in the Notes or any Loan Papers, certificate, report
or other document made or delivered pursuant to this Loan Agreement, unless the
context therein shall otherwise require.

          (b) Defined terms used herein in the singular shall import the plural
and vice versa.

          (c) The words "hereof," "herein," "hereunder" and similar terms when
used in this Loan Agreement shall refer to this Loan Agreement as a whole and
not to any particular provision of this Loan Agreement.

                                   ARTICLE 2
                                   ---------

                          THE REVOLVING CREDIT LOANS
                          --------------------------

    2.01. Revolving Loan Commitments.

          (a) Revolving Loan Commitments.  Subject to the terms and conditions
of this Loan Agreement, each Bank severally agrees to extend to Company, from
the date hereof through the term of this Loan Agreement, a revolving line of
credit which shall not exceed at any one time outstanding such Bank's Percentage
of the lesser of: (i) the Borrowing Base in effect and as redetermined from time
to time, or (ii) the Facility Amount.  No Bank shall be obligated to make any
Loan if, after giving effect thereto, the Total Outstandings exceed the lesser
of (i) the Borrowing Base then in effect or (ii) the Facility Amount.

                                      -22-
<PAGE>
 
     The Commitment shall never exceed the Borrowing Base then in effect.
Provided, however, if, upon the redetermination of the Borrowing Base, the
Borrowing Base exceeds the Commitment then in effect, the Commitment may be
increased to an amount (that shall not exceed the Borrowing Base as
redetermined) which all Banks shall, in their sole discretion, approve in
writing, following a request from Company for such increase, but the Commitment
shall never exceed the Facility Amount.  Except for the increase of the
Commitment to occur upon the closing of the EEX Acquisition, Banks shall have no
obligation to increase the Commitment.  The initial Commitment is $365,000,000,
and upon consummation of the EEX Acquisition, the Commitment shall be (a)
$575,000,000 if Company and EEX do not enter into the Contingency Agreement or
(b) $560,000,000 if Company and EEX enter into the Contingency Agreement but
subject to further adjustment as provided in Section 5.05(c), until redetermined
according to Section 5.03, 5.04 or 5.05 hereof.  The Loan may from time to time
be (i) Floating Base Borrowings, (ii) Eurodollar Borrowings or (iii) CD
Borrowings, as selected by Company and notified to Administrative Agent
according to Section 2.02 hereof.

     An initial Advance in an amount equal to the unpaid principal balance and
accrued interest due on the Indebtedness under the Prior Loan Agreement as of
the Closing Date shall be made by Banks on the Closing Date to refinance the
Indebtedness outstanding as of the Closing Date under the Prior Loan Agreement.
Within the limits of this Section 2.01, Company may borrow, prepay pursuant to
Section 4.02 hereof and reborrow under this Section 2.01.  Each Borrowing
pursuant to this Section 2.01 shall be funded ratably by Banks in proportion to
their respective Percentages.  Each Advance made by a Bank hereunder is herein
called an "Advance"; all Advances made by a Bank hereunder are herein
collectively called a "Loan;" the aggregate unpaid principal balance of all
Advances made by Banks hereunder are herein collectively called the "Loans;" and
the combined Advances made by Banks on any given day are herein collectively
called a "Borrowing."

          (b) Reduction of Commitment.  Company shall have the right, upon three
(3) Business Days' prior written notice to Administrative Agent, to terminate or
to permanently reduce the unborrowed portion of the Commitment, in whole or in
part (provided any partial reduction shall be in the minimum amount of
$10,000,000 or any integral multiple of $1,000,000), effective on the first day
of any Quarterly Period hereafter.  Each partial reduction of the Commitment
shall ratably reduce each Bank's Commitment.  There shall be no termination or
permanent reduction to any borrowed portion of the Commitment unless such
termination or reduction is accompanied by a mandatory prepayment on the Loan in
an amount that will cause the Total Outstandings to not exceed the Commitment as
reduced.

          (c) Commitment Fee.  In addition to the payments provided for in
Article 4 hereof, Company shall pay to Administrative Agent for the account of
each Bank, on the first day of each Quarterly Period, a revolving credit loan
commitment fee at the following rates per annum on the average daily amount of
such Bank's Commitment which was unused during the immediately preceding
Quarterly Period.

                                      -23-
<PAGE>
 
        Borrowing Base Percentage            Commitment Fee
        -------------------------            --------------

        Less than or equal to 50%            one-fourth of one percent (1/4%)

        Greater than 50%                     three-eighths of one percent (3/8%)

If the Borrowing Base Percentage during any Quarterly Period should increase
above 50% or decrease below 50% (or both), the Commitment Fee shall be prorated
as to the number of days during the Quarterly Period that the Borrowing Base
Percentage was above or below 50%, as the case may be.  Company and Banks
acknowledge and agree that the commitment fees payable hereunder are bona fide
commitment fees and are intended as reasonable compensation to Banks for
committing to make funds available to Company as described herein and for no
other purpose.  The commitment fees payable hereunder shall be calculated on the
basis of the actual days elapsed in a year consisting of 360 days.

          (d) Use of Proceeds.  The proceeds of the Loan shall be used (i) on
the Closing Date to refinance the Indebtedness under the Prior Loan Agreement,
(ii) to finance, in part, Company's acquisition of the EEX Properties, (iii) for
the payment of capital expenditures, drilling costs and other expenses incurred
by Company in the further development of the Mineral Properties, (iv) to
purchase additional Mineral Properties and (v) for working capital and general
corporate purposes of Company and its Subsidiaries, but only to the extent that
the use of proceeds for such purposes would be permitted under the terms of this
Loan Agreement.

    2.02. Manner of Borrowing.

          (a) Request for Borrowing.  Each request by Company to Administrative
Agent for a Borrowing under Section 2.01 hereof (a "Request for Borrowing")
shall specify the aggregate amount of such requested Borrowing, the requested
date of such Borrowing, and, when the request for Borrowing specifies a
Eurodollar Borrowing or a CD Borrowing, the Interest Period which shall be
applicable thereto.  Company shall furnish to Administrative Agent the Request
for Borrowing at least three (3) Eurodollar Business Days prior to the requested
Eurodollar Borrowing date (which must be a Eurodollar Business Day) and at least
two (2) Business Days prior to the requested borrowing date (which must be a
Business Day) for a CD Borrowing.  A Floating Base Borrowing may be made the
same date on which a Request for Borrowing is received by Administrative Agent.
Any such Request for Borrowing shall: (i) in the case of a Floating Base
Borrowing, be in the form attached hereto as Exhibit "B", (ii) in the case of a
CD Borrowing, be in the form attached hereto as Exhibit "C" and (iii) in the
case of a Eurodollar Borrowing, be in the form attached hereto as Exhibit "D".
Each Borrowing shall be in an aggregate principal amount of $5,000,000 or any
integral multiple of $1,000,000.  Any Request for Borrowing received by
Administrative Agent after 12:00 noon (New York City time) on any Business Day
shall be deemed to have been received on the next succeeding Business Day.

          Prior to making a Request for Borrowing, Company may (without
specifying whether the anticipated Borrowing shall be a Floating Base Borrowing,
CD Borrowing or Eurodollar Borrowing) request that Administrative Agent provide
Company with the most recent 

                                      -24-
<PAGE>
 
CD Quoted Rate and InterBank Offered Rate available to Reference Banks.
Administrative Agent shall provide such quoted rates to Company on the date of
such request.

          Each Request for Borrowing shall be irrevocable and binding on Company
and, in respect of the Borrowing specified in such Request for Borrowing,
Company shall indemnify each Bank against any cost, loss or expense incurred by
such Bank as a result of any failure to fulfill, on or before the date specified
for such Borrowing, the conditions to such Borrowing set forth herein, including
without limitation, any cost, loss or expense incurred by reason of the
liquidation or reemployment of deposits or other funds acquired by any Bank to
fund the Advance to be made by such Bank as part of such Borrowing when such
Advance, as a result of such failure, is not made on such date.

          After receiving a Request for Borrowing in the manner provided herein,
Administrative Agent shall promptly notify each Bank by telephone (confirmed
immediately by telex, telecopy or cable), telecopy, telex or cable of the amount
of the Borrowing and such Bank's pro rata share of such Borrowing, the date on
which the Borrowing is to be made, the interest option selected and, if
applicable, the Interest Period selected.

          (b) Funding.  Each Bank shall, before 1:00 P.M. (New York City time)
on the date of such Borrowing specified in the notice received from
Administrative Agent pursuant to Section 2.02(a), deposit such Bank's ratable
portion of such Borrowing in immediately available funds to an account
maintained by Administrative Agent as designated by Administrative Agent.  Upon
fulfillment of all applicable conditions set forth herein and after receipt by
the Administrative Agent of such funds, Administrative Agent shall pay or
deliver such proceeds to or upon the order of Company at the principal office of
Administrative Agent in immediately available funds.  The failure of any Bank to
make any Advance required to be made by it hereunder shall not relieve any other
Bank of its obligation to make its Advance hereunder.  If any Bank shall fail to
provide its ratable portion of such funds and if all conditions to such
Borrowing shall have apparently been satisfied, Administrative Agent will make
available such funds as shall have been received by it from the other Banks, in
accordance with this Section 2.02(b).  Neither Administrative Agent nor any Bank
shall be responsible for the performance by any other Bank of its obligations
hereunder.  In the event of any failure by a Bank to make an Advance required
hereunder, the other Banks may (but shall not be required to) purchase (on a pro
rata basis, according to their respective Percentages) such Bank's Note.  Upon
the failure of a Bank to make an Advance required to be made by it hereunder,
Administrative Agent may, in its sole discretion, attempt to obtain one or more
banks, acceptable to Banks, to replace such Bank, but neither Administrative
Agent nor any other Bank shall have any liability or obligation whatsoever as a
result of the failure to obtain a replacement for such Bank.

          Unless Administrative Agent shall have received notice from a Bank
prior to the date of any Borrowing that such Bank will not make available to
Administrative Agent such Bank's ratable portion of such Borrowing,
Administrative Agent may assume that such Bank has made such portion available
to Administrative Agent on the date of such Borrowing in accordance with Section
2.02(b) and Administrative Agent may, in reliance upon such assumption, make
available to or on behalf of Company on such date a corresponding amount.  If
and to the extent such Bank shall not have so made such ratable portion
available to 

                                      -25-
<PAGE>
 
Administrative Agent, such Bank and Company severally agree to repay to
Administrative Agent forthwith on demand such corresponding amount together with
interest at the Federal Funds Rate, for each day from the date such amount is
made available to or on behalf of Company until the date such amount is repaid
to Administrative Agent, at the rate per annum equal to the rate applicable to
the Borrowing in question. If such Bank shall repay to Administrative Agent such
corresponding amount, such amount so repaid shall constitute such Bank's Advance
as part of such Borrowing for purposes of this Loan Agreement.

          (c) Selection of Interest Option.  Upon making a Request for Borrowing
under Section 2.02(a) hereof, Company shall advise Administrative Agent as to
whether the Borrowing shall be (i) a Eurodollar Borrowing, in which case Company
shall specify the applicable Interest Period therefor, (ii) a CD Borrowing, in
which case Company shall specify the applicable Interest Period therefor, or
(iii) a Floating Base Borrowing.  At least two (2) Business Days or Eurodollar
Business Days, as the case may be, prior to the termination of each Interest
Period with respect to a Eurodollar Borrowing or a CD Borrowing (whether such
termination occurs before or after the Maturity Date) Company shall give
Administrative Agent written notice (the "Rollover Notice") of the interest
option which shall be applicable to such Borrowing upon the expiration of such
Interest Period.  If Company shall specify that such Borrowing shall be a
Eurodollar Borrowing or a CD Borrowing, such Rollover Notice shall also specify
the length of the succeeding Interest Period selected by Company with respect to
such Advance.  Each Rollover Notice shall be irrevocable and effective upon
notification thereof to Administrative Agent.  If the required Rollover Notice
shall not have been timely received by Administrative Agent prior to the
expiration of the then-relevant Interest Period, then Company shall be deemed
to have elected to have such Borrowing be a Floating Base Borrowing.  With
respect to any Floating Base Borrowing, Company shall have the right, on any
Business Day or Eurodollar Business Day as the case may be (a "Conversion Date")
to convert such Floating Base Borrowing to a Eurodollar Borrowing or to a CD
Borrowing, by giving Administrative Agent a Rollover Notice of such selection at
least two (2) Business Days or Eurodollar Business Days, as the case may be,
prior to such Conversion Date.

          Notwithstanding anything to the contrary contained herein, Company
shall have no right to request a Eurodollar Borrowing or CD Borrowing if the
interest rate applicable thereto under Section 2.03 hereof would exceed the
Maximum Rate in effect on the first day of the Interest Period applicable to
such Eurodollar Borrowing or CD Borrowing.

    2.03. Interest Rate.

          (a) Floating Base Advance.  The unpaid principal of each Floating Base
Advance shall bear interest from the date of advance until paid at a rate per
annum which shall from day to day be equal to the lesser of (a) the Maximum Rate
or (b) the sum of the Floating Base Rate in effect from day to day plus the
Applicable Margin.

          (b) Eurodollar Advance.  The unpaid principal of each Eurodollar
Advance (inclusive of any rollover of or conversion to a Eurodollar Borrowing)
shall bear interest from the date of advance until paid at a rate per annum
which shall from day to day be equal to the 

                                      -26-
<PAGE>
 
lesser of (i) the Maximum Rate or (ii) the sum of the Adjusted InterBank Rate
for the Interest Period in effect plus the Applicable Margin.

          (c) CD Advance.  The unpaid principal balance of each CD Advance
(inclusive of any rollover of or conversion to a CD Borrowing) shall bear
interest from the date of advance until paid at a rate per annum which shall
from day to day be equal to the lesser of (a) the Maximum Rate or (b) the sum of
(i) the FDIC Percentage in effect on such date plus (ii) the Adjusted CD Rate
for Interest Period in effect plus (iii) the Applicable Margin.

          (d) Threshold Amount.  During the period from the Closing Date to
April 15, 1999, changes to the Applicable Margin on account of the Total
Outstandings exceeding the Threshold Amount shall (a) take effect automatically
without prior notice to Company upon the occurrence of such event as to any
Floating Base Borrowing then outstanding and any CD Borrowing and Eurodollar
Borrowing then outstanding if 30 days or more remain until the termination of
the Interest Period for such CD Borrowing and Eurodollar Borrowing, or (b) take
effect as to any CD Borrowing and Eurodollar Borrowing then outstanding with
less than 30 days remaining until the termination of the Interest Period for
such CD Borrowing and Eurodollar Borrowing upon the termination of the Interest
Period for such CD Borrowing or Eurodollar Borrowing, as the case may be;
provided, however, that subsequent changes to the Applicable Margin that occur
when the Total Outstandings do not exceed the Threshold Amount shall take effect
on the next Business Day succeeding the date that either of the following shall
occur:

              (i)   Company makes a prepayment of principal on the Loan in an
     amount that will cause the resulting Total Outstandings to not exceed the
     Threshold Amount;

              (ii)  Company provides to Agents a Borrowing Base Certificate
     pursuant to Section 5.03, 5.04 or 5.05 hereof that certifies that the Total
     Outstandings do not exceed the Threshold Amount; or

              (iii) Company provides to Agents a certificate (a "Supplemental
     Certificate") signed by the chief financial officer of Company that
     certifies that Company has acquired additional Mineral Properties that are
     not included in the Borrowing Base then in effect, and if such additional
     Mineral Properties were to be included in the Borrowing Base then in effect
     the then Total Outstandings would not exceed the Threshold Amount
     calculated after giving effect to the Borrowing Base value allocable to the
     additional Mineral Properties, such certificate to also include (a) either
     a Reserve Report prepared by Miller and Lents or such other firm of
     independent petroleum engineers acceptable to Agents, or, if approved by
     Majority Banks, a Reserve Report prepared by the chief in-house petroleum
     engineer employed by Company that evaluates the additional Mineral
     Properties and (b) title opinions and other title information satisfactory
     to Agents that evidence that Company owns indefeasible title to such
     additional Mineral Properties, and such certificate shall take into account
     any adjustments to the Borrowing Base required under Section 5.05 hereof.
     The Threshold Amount calculated after giving effect to the Borrowing Base
     value allocable to the additional 

                                      -27-
<PAGE>
 
     Mineral Properties as set forth in Company's Supplemental Certificate shall
     not cause or constitute a redetermination of the Borrowing Base then in
     effect, but shall establish the Threshold Amount to be in effect until
     redetermined according to this Section 2.03(d) or Section 5.03, 5.04 or
     5.05 hereof. However, the Borrowing Base value allocable to the additional
     Mineral Properties shall be included with the Borrowing Base then in effect
     for sole and limited purpose of determining the Borrowing Base Percentage
     and the Applicable Margin in effect when the Total Outstandings do not
     exceed the Threshold Amount.

     Provided, however, that (a) in the case of subclause (ii) above, if
     pursuant to Section 5.03, 5.04 or 5.05 hereof, Majority Banks disapprove of
     the Borrowing Base proposed by Company under its Borrowing Base Certificate
     and Majority Banks approve a Borrowing Base that reflects that the then
     Total Outstandings exceed the Threshold Amount, or (b) in the case of
     subclause (iii) above, Majority Banks determine that the Borrowing Base
     value allocable to the additional Mineral Properties set forth in Company's
     Supplemental Certificate does not cause the then Total Outstandings to be
     less than the Threshold Amount calculated after giving effect to the
     Borrowing Base value allocable to the additional Mineral Properties, the
     Applicable Margin that is in effect when the Total Outstandings exceed the
     Threshold Amount shall again take effect retroactive to the prior date that
     the Applicable Margin took effect based upon Company's Borrowing Base
     Certificate or Supplemental Certificate, as the case may be, in which case
     Company shall pay to Administrative Agent, for the account of Banks, the
     amount of underpayment of interest resulting from the retroactive
     application of interest under this Section 2.03(d), such payment to be made
     by Company within five (5) Business Days following Company's receipt of
     notice from Administrative Agent of such underpayment of interest.
     Thereafter, the Applicable Margin that is in effect when the Total
     Outstandings exceed the Threshold Amount shall remain in effect until
     either of the events set forth above in subclause (i), (ii) or (iii) above
     shall occur.

     2.04.  Borrowing Base Increase Fee.  Company shall pay to Administrative
Agent, for the account of all Banks, an additional fee upon each subsequent
increase to the Borrowing Base that is agreed to by Banks according to Section
2.01(a) and Article 5 hereof in an amount that is agreed to between Company and
Banks as a condition precedent to the increase to the Borrowing Base by Banks.
 
     2.05   Up-Front Fees.  At the Closing Date, Company shall pay to
Administrative Agent the fee that is required to be paid by Company to Agents
pursuant to that certain fee letter agreement dated March 23, 1998 among
Company, Agents and Arrangers.  The Administrative Agent shall distribute such
fees to Banks according to the respective percentages for each Bank as set forth
in the memorandum dated March 27, 1998 from Agents to Banks.
 
     2.06   Maximum Number of Eurodollar Borrowings.  All Eurodollar Borrowings,
including rollovers of Eurodollar Borrowings and conversions to Eurodollar
Borrowings, shall be made in such manner that, after giving effect thereto,
there are no more than twelve (12) Interest Periods applicable to outstanding
Eurodollar Borrowings in effect at any time; provided, 

                                      -28-
<PAGE>
 
however, that more than twelve (12) such Interest Periods applicable to
outstanding Eurodollar Borrowings may be permitted to be in effect with the
prior approval of Administrative Agent.

                                   ARTICLE 3
                                   ---------

                                   GUARANTY
                                   --------

     3.01.  Guaranty.  The Loan shall be unconditionally guaranteed by CT
Operating and each of the Gas Marketing Subsidiaries pursuant to a form of
Guaranty satisfactory to Majority Banks.  CT Operating and each Gas Marketing
Subsidiary will be required to make customary representations and warranties
required by Majority Banks of guarantors.

                                   ARTICLE 4
                                   ---------

                            NOTES AND NOTE PAYMENTS
                            -----------------------

     4.01.  Notes.  The Advances made under Section 2.01(a) hereof by a Bank
shall be evidenced by the Revolving Promissory Notes executed by Company and
delivered to each Bank pursuant to the terms of this Agreement (each a "Note"
and collectively, the "Notes") which Notes shall (i) be dated the date hereof,
(ii) be in the amount of such Bank's Percentage of the Facility Amount, (iii) be
payable to the order of such Bank at the office of Administrative Agent, (iv)
bear interest in accordance with Section 2.03 hereof, and (v) be in the form of
Exhibit "A" attached hereto with blanks appropriately completed in conformity
herewith.  Each Note shall mature on the Maturity Date, at which time all
Obligations under such Note shall become immediately due and payable.
Notwithstanding the principal amount of any Bank's Note as stated on the face
thereof, (a) such Bank's Commitment shall never exceed its Percentage of the
Commitment then in effect, and (b) the amount of principal actually owing on
such Note at any given time shall be the aggregate of all Advances theretofore
made to Company hereunder, less all payments of principal theretofore actually
received hereunder, by such Bank.  Each Bank is authorized, but is not required,
to endorse on the schedule attached to its Note appropriate notations evidencing
the date and amount of each Advance as well as the amount of each payment made
by Company hereunder.

     4.02.  Prepayments.

            (a) Optional Prepayments.  Company may, without premium or penalty,
upon one (1) Business Days' prior written notice to Administrative Agent, prepay
the principal of the Notes then outstanding, in whole or in part, at any time or
from time to time; provided, however, that (i) each prepayment of less than the
full outstanding principal balance of any Note shall be in an amount equal to
$1,000,000 or an integral multiple thereof, (ii) if Company shall prepay the
principal of any Eurodollar Borrowing or CD Borrowing on any date other than the
last day of the Interest Period applicable thereto, Company shall also pay to
Administrative Agent, for the account of Banks, the amounts specified in Section
12.05 (with respect to a Eurodollar Borrowing or a CD Borrowing), and (iii)
Company shall at all times maintain a sufficient portion of the Loans as a
Floating Base Borrowing to allow Company to make regularly scheduled payments of
principal without paying a CD Borrowing or Eurodollar Borrowing prior to the end

                                      -29-
<PAGE>
 
of the applicable Interest Period.  Upon receipt of such notice of intention to
prepay, Administrative Agent shall promptly notify each Bank of the receipt of
such notice and of the date and amount of the proposed prepayment.

          (b) Mandatory Prepayments.  Company shall make mandatory prepayments
of the Notes, as appropriate, as required under Sections 8.13 and Section 9.07.
In addition, if Company should make a public offering of any of its Capital
Stock or its units in the Proposed Royalty Trust, then Company shall make a
mandatory prepayment of the Notes in an amount equal to the net proceeds
received by Company upon the closing of such offering.

          (c) General Prepayment Provisions.  Any prepayment of a Note hereunder
shall be (i) made together with interest accrued (through the date of such
prepayment) on the principal amount prepaid, and (ii) applied first to accrued
interest and then to principal.

   4.03.  Payment of Interest on the Notes.

          (a) Notes.  Interest on the unpaid principal amount of each Floating
Base Advance under the Notes shall be payable quarterly as it accrues on the
last Business Day of each Quarterly Period, commencing June 30, 1998, and at the
Maturity Date.  Interest on the unpaid principal amount of each Eurodollar
Advance and CD Advance under the Notes shall be payable on the last day of each
Interest Period applicable to such Advance or, if such Interest Period is longer
than three months for any Eurodollar Advance, at intervals of three months after
the first day thereof, or if such Interest Period is longer than 90 days for any
CD Advance, at intervals of 90 days after the first day thereof.

          (b) Recapture Rate.  If, on any interest payment date, Administrative
Agent does not receive (for the account of any Bank) interest on such Bank's
Note computed (as if no Maximum Rate limitations were applicable) at the
applicable contract rate described herein, because the applicable contract rate
exceeds or has exceeded the Maximum Rate, then Company shall, upon the written
demand of Administrative Agent or such Bank, pay to such Bank, in addition to
interest otherwise required hereunder, on each interest payment date thereafter,
the Excess Interest Amount (hereinafter defined) calculated as of such later
interest payment date; provided, however, that in no event shall Company be
required to pay, for any appropriate computation period, interest at a rate
exceeding the Maximum Rate effective during such period.  The term "Excess
Interest Amount" shall mean, on any date, with respect to the Note of any Bank,
the amount by which (a) the amount of all interest which would have accrued
prior to such date on the principal of such Note (had the applicable contract
rate(s) described herein at all times been in effect, without limitation by the
Maximum Rate) exceeds (b) the aggregate amount of interest actually paid to such
Bank on such Note on or prior to such date.

   4.04.  Calculation of Interest Rates.  Interest on the unpaid principal
of each CD Borrowing and Eurodollar Borrowing shall be calculated on the basis
of the actual days elapsed in a year consisting of 360 days.  Interest on the
unpaid principal of each Floating Base Borrowing shall be calculated on the
basis of the actual days elapsed in a year consisting of 365 or 366 days, as
appropriate.

                                      -30-
<PAGE>
 
     4.05.  Manner and Application of Payments.  All payments of principal
of, and interest on, any Note to or for the account of any Bank shall be made by
Company to Administrative Agent before 2:00 p.m. (New York City time), in
Federal or other immediately available funds at Administrative Agent's principal
banking office in New York City.  Should the principal of, or any installment of
the principal or interest on, any Note, or any commitment fee, become due and
payable on a day other than a Business Day, the maturity thereof shall be
extended to the next succeeding Business Day.  Each payment received by
Administrative Agent hereunder for the account of a Bank shall be promptly
distributed by Administrative Agent to such Bank.  All payments made on any Note
shall be credited, to the extent to the amount thereof, in the following manner:
(i) first to fees, costs and expenses which Company has agreed to pay under the
Loan Papers for which Company has received an invoice no later than five (5)
days prior to such payment, (ii) second, against the amount of interest accrued
and unpaid on such Note as of the date of such payment; (iii) third, against all
principal (if any) due and owing on such Note as of the date of such payment;
(iv) fourth, as a prepayment of outstanding Floating Base Advances under such
Note; (v) fifth, as a prepayment of outstanding Eurodollar Advances and CD
Advances under such Note; and (vi) sixth, as a prepayment of any remaining
Obligation.  Subject to the foregoing, payments and prepayments of principal of
the Notes shall be applied to such outstanding Floating Base Borrowings,
Eurodollar Borrowings and CD Borrowings under such Notes as Company shall
select; provided, however, that Company shall select Floating Base Borrowings,
Eurodollar Borrowings and CD Borrowings to be repaid in a manner designated to
minimize the Consequential Loss, if any, resulting from such payments; and
provided further that, if Company shall fail to select the Floating Base
Borrowings, Eurodollar Borrowings and CD Borrowings to which such payments are
to b applied, or if an Event of Default has occurred and is continuing at the
time of such payment, then Administrative Agent shall be entitled to apply the
payment to such Floating Base Borrowings, Eurodollar Borrowings and CD
Borrowings in the manner it shall deem appropriate.

     4.06.  Pro Rata Treatment.  Each payment received by Administrative
Agent hereunder for account of Banks or any of them on the Notes shall be
distributed to each Bank entitled to share in such payment, pro rata in
proportion to the then-unpaid principal balance of the Note of each Bank.
Unless Administrative Agent shall have received notice from Company prior to the
date on which any payment is due to Banks hereunder that Company will not make
such payment in full, Administrative Agent may assume that Company has made such
payment in full to Administrative Agent on such date and Administrative Agent
may, in reliance upon such assumption, cause to be distributed to each Bank on
such due date an amount equal to the amount then due such Bank.  If and to the
extent Company shall not have so made such payment in full to Administrative
Agent, each Bank shall repay to Administrative Agent forthwith on demand such
amount distributed to such Bank together with interest at the Federal Funds
Rate, for each day from the date such amount is distributed to such Bank until
the date such Bank repays such amount to Administrative Agent, at the rate
applicable to such portion of the Loan on its due date.

     4.07.  Lending Office.  Each Bank may (a) designate its principal office
or a foreign branch, subsidiary or affiliate of such Bank as its lending office
(and the office to whose accounts payments are to be credited) for any
Eurodollar Advance, (b) designate its principal office or a domestic branch,
subsidiary or affiliate as its lending office (and the office to whose accounts

                                      -31-
<PAGE>
 
payments are to be credited) for any CD Advance or Floating Base Advance and (c)
change its lending offices from time to time by notice to Administrative Agent
and Company.  In such event, such Bank shall continue to hold the Note
evidencing its loans for the benefit and account of such foreign branch,
subsidiary or affiliate.  Each Bank shall be entitled to fund all or any portion
of its Loan in any manner that it deems appropriate, but for the purposes of
this Agreement such Bank shall, regardless of such Bank's actual means of
funding, be deemed to have funded its Loan in accordance with the interest
option from time to time selected by Company for such Borrowing.

   4.08.  Taxes.

          (a) Any and all payments by Company hereunder or under the Notes shall
be made, in accordance with Section 4.05, free and clear of and without
deduction for any and all present or future taxes, levies, imposts, deductions,
charges or withholdings, and all liabilities with respect thereto (hereinafter
referred to as "Taxes"), excluding, in the case of each Bank and Administrative
Agent, taxes imposed on its income, and franchise taxes imposed on it, by the
jurisdiction under the laws of which such Bank or Administrative Agent (as the
case may be) is organized or is or should be qualified to do business or any
political subdivision thereof and, in the case of each Bank, taxes imposed on
its income, and franchise taxes imposed on it by the jurisdiction of such Bank's
lending office or any political subdivision thereof.  If Company shall be
required by law to deduct any taxes (i.e., such taxes, liens, imposts,
deductions, charges, withholdings and liabilities for which Company is
responsible under the preceding sentence) from or in respect of any sum payable
hereunder or under any Note to any Bank or Administrative Agent, (i) the sum
payable shall be increased as may be necessary so that after making all required
deductions (including deductions applicable to additional sums payable under
this Section 4.08) such Bank or Administrative Agent (as the case may be)
receives an amount equal to the sum it would have received had no such
deductions been made, (ii) Company shall make such deductions and (iii) Company
shall pay the full amount deducted to the relevant taxation authority or other
authority in accordance with applicable law.

          (b) In addition, Company agrees to pay any present or future stamp or
documentary taxes or any other excise or property taxes, charges or similar
levies which arise from any payment made hereunder or under the Loan Papers or
from the execution, delivery or registration of, or otherwise with respect to,
this Agreement or the other Loan Papers (hereinafter referred to as "Other
Taxes").

          (c) Company will indemnify each Bank and Administrative Agent for the
full amount of Taxes or Other Taxes (including, without limitation, any Taxes or
Other Taxes imposed by any jurisdiction on amounts payable under this Section
4.08) paid by such Bank or Administrative Agent (as the case may be) or any
liability (including penalties and interest) arising therefrom or with respect
thereto, whether or not such Taxes or Other Taxes were correctly or legally
asserted.  This indemnification shall be made within 30 days from the date such
Bank or Administrative Agent (as the case may be) makes written demand therefor,
which demand shall contain an invoice itemizing the Taxes, Other Taxes or
related liability which is subject to Company's indemnification according to
this Section 4.08.

                                      -32-
<PAGE>
 
          (d) Within 30 days after the date of any payment of Taxes, Company
will furnish to Administrative Agent, at its address referred to in Section
13.05, the original or a certified copy of a receipt evidencing payment thereof.

          (e) Without prejudice to the survival of any other agreement of
Company hereunder, the agreements and obligations of Company contained in this
Section 4.08 shall survive the payment in full of principal and interest
hereunder and under the other Loan Papers for the applicable period of
limitations respecting any Taxes, Other Taxes or related liability of Company
under this Section 4.08.

          (f) Each Bank agrees to use good faith efforts to carry out its
obligations under this Loan Agreement in such a way as to reduce the amount of
Taxes attributable to the Loan, including the use of a different lending office,
as long as in the good faith opinion of such Bank such actions would not
adversely affect it.

   4.09.  Sharing of Payments, etc.  If any Bank shall obtain any payment
(whether voluntary, involuntary, through the exercise of any right of set-off,
or otherwise) on account of the Advances made by it in excess of its ratable
share of payments on account of the Advances obtained by all Banks, such Bank
shall forthwith purchase from the other Banks such participations in the
Advances made by them as shall be necessary to cause such purchasing Bank to
share the excess payment ratably with each of them, provided, however, that if
all or any portion of such excess payment is thereafter recovered from such
purchasing Bank, such purchase from each Bank shall be rescinded and such Bank
shall repay to the purchasing Bank the purchase price to the extent of such
recovery together with an amount equal to such Bank's ratable share (according
to the proportion of (i) the amount of such Bank's required repayment, to (ii)
the total amount so recovered from the purchasing Bank) of any interest or other
amount paid or payable by the purchasing Bank in respect of the total amount
recovered.  Company agrees that any Bank so purchasing a participation from
another Bank pursuant to this Section 4.09 may, to the fullest extent permitted
by law, exercise all of its rights of payment (including the right of set-off)
with respect to such participation as fully as if such Bank were the direct
creditor of Company in the amount of such participation.  The foregoing
provisions shall also apply to any payments received by any Bank from a Gas
Marketing Subsidiary respecting a payment under the Guaranty of such Gas
Marketing Subsidiary.

                                   ARTICLE 5
                                   ---------

                                BORROWING BASE
                                ---------------

   5.01.  Borrowing Base Tests.

          (a) Borrowing Base Tests.  The Borrowing Base shall be determined,
redetermined and adjusted from time to time pursuant to this Article 5.  Upon
each determination and redetermination of the Borrowing Base pursuant to this
Loan Agreement, the Borrowing Base shall be the lesser of (i) the PV Borrowing
Base Test set forth in subsection 5.01(a)(i) below, (ii) the Adjusted PV
Borrowing Base Test set forth in subsection 5.01(a)(ii) below or (iii) the Cash
Flow Borrowing Base Test set forth in subsection 5.01(a)(iii) below.

                                      -33-
<PAGE>
 
          (i)   The PV Borrowing Base. The PV Borrowing Base shall be based upon
economic variables which evaluate the discounted present value of future net
income accruing to the Borrowing Base Assets as established by the Reserve
Reports delivered from time to time hereunder (herein called the "Present Value
of Borrowing Base Reserves") and the Gas Subsidiaries' Loan Value as determined
from time to time. The PV Borrowing Base Test shall equal the sum of (a) fifty
percent (50%) of the Present Value of Borrowing Base Reserves that are
attributable to the Proved Reserves allocable to the Borrowing Base Assets;
provided, however, that at least eighty-five percent (85%) of such Proved
Reserves shall consist of Proved Developed Producing Reserves, and (b) the loan
value assigned to the operations of the Gas Marketing Subsidiaries as determined
according to Section 5.07 herein (such loan value is herein called the "Gas
Subsidiaries' Loan Value"). The term "Borrowing Base Assets" shall mean only
such Mineral Properties (i) to which Company has good and indefeasible title and
(ii) which are not subject to any liens, encumbrances or charges, except for
Permitted Liens for or against which Indebtedness is not due and payable.

          (ii)  The Adjusted PV Borrowing Base Test. For the period from the
Closing Date to April 15, 1999, the Adjusted PV Borrowing Base Test shall equal
the remainder of (i) the quotient of (a) the Present Value of Borrowing Base
Reserves that are attributable to the Proved Reserves allocable to the Borrowing
Base Assets (provided that at least eighty-five percent (85%) of such Proved
Reserves shall consist of Proved Developed Producing Reserves) plus the Gas
Subsidiaries' Loan Value divided by (b) 1.29, less (ii) the unpaid principal
balance of the Subordinated Indebtedness then outstanding.  From and after April
15, 1999, the Adjusted PV Borrowing Base Test shall equal the remainder of (i)
the quotient of (a) the Present Value of Borrowing Base Reserves that are
attributable to the Proved Reserves allocable to the Borrowing Base Assets
(provided that at least eighty-five percent (85%) of such Proved Reserves shall
consist of Proved Developed Producing Reserves) plus the Gas Subsidiaries' Loan
Value divided by (b) 1.35, less (ii) the unpaid principal balance of the
Subordinated Indebtedness then outstanding.

          (iii) The Cash Flow Borrowing Base Test. The Cash Flow Borrowing Base
Test shall establish a Borrowing Base amount that, based on Company's Cash Flow,
will (i) cause the Borrowing Base to be fully amortized over a period of years
selected by Company and approved by Majority Banks (or selected by Majority
Banks in their sole discretion if Majority Banks do not agree with Company's
proposed amortization period), with such amortization to be accomplished through
assumed quarterly principal payments on the amortizing Borrowing Base at the end
of each Quarterly Period of such amortization period and (ii) cause (a) Company
to maintain a Cash Flow for each of the current year and next succeeding year of
the assumed amortization period (or partial current annual period in the case of
a special determination of the Borrowing Base under Section 5.04, with the
current year commencing on January 1 of the year in which the certificate
described in Section 5.06(a) is delivered) that is 1.25 times greater than the
cumulative payments of principal which are necessary to make the required
amortization of the Borrowing Base during each of such years, and (b) Company to
maintain a Cash Flow for each annual period of the assumed amortization period
thereafter that is 1.00 times greater than the cumulative payments of principal
which are necessary to make the required amortization of the Borrowing Base
during each of such years. (The amortization of the Borrowing Base that is

                                      -34-
<PAGE>
 
required to establish the Cash Flow Borrowing Base Test is herein called the
"Assumed Amortization Schedule.") Although the Assumed Amortization Schedule may
establish a Borrowing Base that may not be fully amortized until after the
Maturity Date, nothing contained herein shall be construed to extend the
Maturity Date.

     The Borrowing Base Tests and all components thereof shall be based upon the
information contained in the most recent Reserve Report and Gas Report delivered
by Company to Banks pursuant to Sections 5.03 and 5.04, together with any other
information reasonably requested by either Agent or Majority Banks, and shall be
determined in the manner and according to the procedures set forth in this
Article 5; provided further, that the components used to establish the Borrowing
Base Tests shall be subject to adjustment as determined by Majority Banks if
Majority Banks determine that there has been a material change in the Reserve
Base or Production Profile of the Proved Reserves attributable to the Mineral
Properties (such adjustment to the components used to establish the Borrowing
Base Tests to be effective upon written notice thereof from Agents to Company).
 
     Any Borrowing Base which becomes effective as a result of any
redetermination of the Borrowing Base according to this Article 5 shall be
subject to the following restrictions:  (a) such Borrowing Base shall not exceed
the Borrowing Base requested by Borrower pursuant to Section 5.03 or 5.04 (as
applicable), (b) such Borrowing Base shall not exceed the Commitment then in
effect, (c) to the extent such Borrowing Base represents an increase from the
Borrowing Base in effect prior to such redetermination, shall be approved by all
Banks, and (d) to the extent such Borrowing Base represents a decrease or
reaffirmation of the prior Borrowing Base, shall be approved by Majority Banks.
Notwithstanding the foregoing, provided that all conditions precedent set forth
in Sections 7.02 and 7.03 have been satisfied, the Borrowing Base and the
Commitment shall be increased to (a) $575,000,000 if Company and EEX do not
enter into the Contingency Agreement or (b) $560,000,000 if Company and EEX
enter into the Contingency Agreement upon closing of the EEX Acquisition but
subject to further adjustment as provided in Section 5.05(c).

     5.02.  Initial Borrowing Base.  During the period from the Closing Date
to the closing of the EEX Acquisition, the Borrowing Base shall be $365,000,000,
unless sooner redetermined according to Section 5.03, 5.04, or 5.05.  From
consummation of the EEX Acquisition to June 30, 1999, the Borrowing Base shall
be (a) $575,000,000 if Company and EEX do not enter into the Contingency
Agreement or (b) $560,000,000 if Company and EEX enter into the Contingency
Agreement but subject to further adjustment as provided in Section 5.05(c),
unless sooner redetermined according to Section 5.03, 5.04 or 5.05.

     5.03.  Subsequent Determination of Borrowing Base.  The Borrowing Base
shall be determined annually as of each Determination Date of each year during
the Loan commencing June 30, 1999.  Company shall deliver to Banks on or before
April 15 of each year, commencing April 15, 1999:

            (a) a report (the "Reserve Report") prepared as of December 31 of
the immediately preceding year by Miller and Lents or such other firm or firms
of independent petroleum engineers acceptable to Agents, in accordance with
customary standards and 

                                      -35-
<PAGE>
 
procedures of the petroleum industry, which report shall evaluate the Proved
Reserves attributable to the Mineral Properties as Company desires to be
considered for Borrowing Base purposes (such evaluation shall include, without
limitation, a description of Proved Reserves, rates of production, gross
revenues, operating expenses, windfall profit taxes, ad valorem taxes, capital
costs, net revenues and present value of future net revenues attributable to
such reserves and production therefrom, and a statement of the assumptions upon
which such determinations were made), and each Reserve Report shall utilize in
its evaluation of the Proved Reserves attributable to the Mineral Properties the
economic variables agreed to by Company and Agents and approved by Majority
Banks (or designated by Majority Banks if Company and Majority Banks are unable
to agree to such variables) pursuant to Section 5.07 hereof;

          (b) a report (the "Gas Report"), prepared by Company as of December 31
of the immediately preceding year and certified by the chief financial officer
of Company as being true and correct, setting forth in reasonable detail the
results of the operations of the Gas Marketing Subsidiaries for the preceding
year, including income and expenses attributable to each of the Gas Marketing
Subsidiaries during such period, and a projection of cash flow setting forth for
each of the Gas Marketing Subsidiaries the projected (a) net earnings (before
income taxes) of such Gas Marketing Subsidiary for the current fiscal year and
each succeeding fiscal year during the remaining term of the Loan, as determined
in accordance with Generally Accepted Accounting Principles plus (b) any non-
cash changes, such as depreciation, depletion and amortization, which were
subtracted from gross earnings in determining projected net earnings for
purposes of clause (a) above, and each such Gas Report shall utilize in its
economic projections the economic variables, assumptions, computations and other
parameters agreed to by Company and Agents and approved by Majority Banks (or
designated by Majority Banks if Company and Majority Banks are unable to agree
to such variables, assumptions, computations and other parameters) for the
purpose of establishing the Gas Subsidiaries' Loan Value pursuant to Section
5.07 hereof;

          (c) a certificate signed by the chief financial officer of Company,
which sets forth Company's proposed Assumed Amortization Schedule and projects
(i) Company's Cash Flow for each annual period until the Borrowing Base has been
fully amortized according to the Assumed Amortization Schedule, with each such
annual period commencing January 1 of each applicable year and ending on
December 31 of such year, and with Cash Flow being based upon the most recent
Reserve Report and Gas Report submitted to Banks pursuant to Section 5.03 and
the financial information delivered to Banks according to Section 9.01 hereof,
(ii) the cumulative projected payments of interest on the Loan during each such
annual period, with such projected interest payments to be determined on the
basis of the Projected Interest Rate during such annual periods and (iii) the
projected cumulative payments of principal which are necessary to make the
amortization of the Borrowing Base according to the Assumed Amortization
Schedule during the current and each succeeding annual periods during the term
of the proposed Assumed Amortization Schedule, with each such annual period
commencing January 1 of each applicable year and ending on December 31 of such
year, such certificate to include all computations and derivations relating to
the Assumed Amortization Schedule and the projections specified in subclauses
(i) through (iii) above in reasonable detail (the projections set forth in
subclauses (i) through (iii) above are herein called the "Cash Flow
Projections");

                                      -36-
<PAGE>
 
          (d) if requested by either Agent, (a) title opinions or other title
information, satisfactory to such Agent to evidence that Company holds
indefeasible title to those additional Mineral Properties to be included in the
Borrowing Base, and/or (b) any Hedge Agreements then in force and effect, and/or
(c) such specific agreements and contracts which evidence the right of the Gas
Marketing Subsidiaries to receive any projected revenues or cash flow set forth
in the Gas Report; and

          (e) a certificate (the "Borrowing Base Certificate"), signed by the
chief financial officer of Company which sets forth Company's determination of
the Borrowing Base Tests and resulting Borrowing Base and components thereof as
set forth in Section 5.01 hereof, such certificate to include all computations
and derivations relating to Company's proposed Borrowing Base Tests and
resulting Borrowing Base, and components thereof in reasonable detail, all of
which shall be based upon the Reserve Report delivered pursuant to subclause (a)
above, the Gas Report delivered pursuant to subclause (b) above, and the Assumed
Amortization Schedule and Cash Flow Projections delivered pursuant to clause (c)
above.  Also, for Borrowing Base determinations prior to April 15, 1999,
Company's Borrowing Base Certificate shall also set forth Company's calculation
of the Threshold Amount.

     Within forty-five (45) days after their receipt of such information, Agents
shall give Company and Banks written notice of whether Majority Banks approve of
the proposed Borrowing Base as established by the Borrowing Base Tests set forth
in Company's Borrowing Base Certificate, or, alternatively, whether Majority
Banks disapprove of the proposed Borrowing Base as established by the Borrowing
Base Tests set forth in Company's Borrowing Base Certificate, including, without
limitation, Majority Banks disapproval of the Assumed Amortization Schedule and
the Cash Flow Projections set forth in such certificate.  If, for any reason,
Majority Banks disapprove of the Borrowing Base proposed by Company according to
its determination of the Borrowing Base Tests, then Company and Agents shall
consult with one another to determine the Borrowing Base Tests and the resulting
Borrowing Base which will be approved by Majority Banks.  Majority Banks shall
determine, in their sole discretion, the Borrowing Base Tests and the resulting
Borrowing Base if the Reserve Report, Gas Report, Assumed Amortization Schedule,
Cash Flow Projections and Borrowing Base Certificate required to be delivered to
Banks pursuant to this Section 5.03 are not delivered to Banks on or before
April 15 of the applicable year or if Majority Banks and Company are not able to
agree upon the Borrowing Base should Majority Banks disapprove of the Borrowing
Base Tests and resulting Borrowing Base proposed by Company.  The Borrowing Base
(and the resulting Commitment of Banks) established pursuant to this Section
5.03 shall be effective as of the ensuing Determination Date and shall remain in
effect until it is subsequently redetermined pursuant to this Section 5.03 or
Section 5.04 or is adjusted pursuant to Section 5.05; provided, however, if the
Borrowing Base as redetermined represents a decrease in the Borrowing Base then
in effect, the Bank's Commitment shall decrease to the amount of the
redetermined Borrowing Base effective as of the date that Agents provide Company
with written notice of the redetermined Borrowing Base.  Also, for Borrowing
Base determinations prior to April 15, 1999, the foregoing shall also apply to
Majority Banks' approval or determination of the Threshold Amount.

                                      -37-
<PAGE>
 
   5.04.  Special Determination of Borrowing Base.  In addition to the
determinations of the Borrowing Base required pursuant to Section 5.03 hereof,
special determinations thereof may be made for any reason not more than once
during any twelve month period during the Loan at the option of (i) Company,
(ii) either Agent or (iii) Majority Banks.  In order to request a special
determination of the Borrowing Base, the Person requesting such determination
shall provide Agents and Company with a written request of such determination.
Prior to any special determination of the Borrowing Base, Company shall submit
to Banks:

          (a) a current Reserve Report prepared by Miller and Lents or such
other firm of independent petroleum engineers acceptable to Majority Banks,
prepared in accordance with customary standards and procedures of the petroleum
industry, which report shall (A) evaluate the Mineral Properties subject to such
redetermination (in the same manner as provided in Section 5.03) and (B) be
dated within sixty (60) days of such requested redetermination;

          (b) a current Gas Report prepared by Company and certified by the
chief financial officer of Company, which report shall be dated within sixty
(60) days of the requested redetermination;

          (c) an Assumed Amortization Schedule and Cash Flow Projections
certified by the chief financial officer of Company, based upon the Reserve
Report and Gas Report delivered under subclauses (a) and (b) above;

          (d) if requested by either Agent, (a) title opinions or other title
information, acceptable to such Agent to evidence that Company holds
indefeasible title to those Mineral Properties which are to be considered within
the Borrowing Base, and/or (b) any Hedge Agreements then in force and effect,
and/or (c) such specific agreements and contracts which evidence the right of
the Gas Marketing Subsidiaries to receive any projected revenues or cash flow
set forth in the Gas Report; and

          (e) a Borrowing Base Certificate, signed by the chief financial
officer of Company, which sets forth Company's determination of the Borrowing
Base Tests and the resulting Borrowing Base and components thereof as set forth
in Section 5.01 hereof, such certificate to include all computations and
derivations relating to Company's proposed Borrowing Base Tests and resulting
Borrowing Base and components thereof in reasonable detail, all of which shall
be based upon the Reserve Report delivered pursuant to subclause (a) above, the
Gas Report delivered pursuant to subclause (b) above, and the Assumed
Amortization Schedule and Cash Flow Projections delivered pursuant to subclause
(c) above.  Also, for Borrowing Base determinations prior to April 15, 1999,
Company's Borrowing Base Certificate shall also set forth Company's calculation
of the Threshold Amount.

   Within forty-five (45) days after their receipt of such information, Agents
shall give Company and Banks written notice of whether Majority Banks approve of
the proposed Borrowing Base Tests and the resulting Borrowing Base set forth in
Company's Borrowing Base Certificate, or, alternatively, whether Majority Banks
disapprove of the proposed Borrowing Base Tests and the resulting Borrowing Base
set forth in Company's Borrowing Base Certificate including, without limitation,
Majority Banks disapproval of Company's Assumed Amortization 

                                      -38-
<PAGE>
 
Schedule or Cash Flow Projections. If, for any reason, Majority Banks disapprove
of the Borrowing Base Tests and the resulting Borrowing Base proposed by
Company, then Company and Agents shall consult with one another to determine the
Borrowing Base which will be approved by Majority Banks. If a Borrowing Base
Deficiency shall exist upon any redetermination of the Borrowing Base under this
Section 5.04 and such Borrowing Base Deficiency is not cured by the next
succeeding Borrowing Base determined pursuant to Section 5.03 hereof, then there
shall be a mandatory redetermination of the Borrowing Base as of the anniversary
date of the effective date of such Borrowing Base Deficiency. Such mandatory
redetermination shall be in addition to any special redetermination of the
Borrowing Base which may be made pursuant to this Section 5.04. (Also, as set
forth in Section 6.21, Section 6.22 and Section 9.19, a redetermination of the
Borrowing Base may be made according to such Sections, which redeterminations
shall be in addition to any other redetermination which may be made pursuant to
this Section 5.04.) Majority Banks shall determine, in their sole discretion,
the Borrowing Base Tests and resulting Borrowing Base if the Reserve Report, Gas
Report, Assumed Amortization Schedule and Cash Flow Projections and certificate
required to be delivered to Banks pursuant to this Section 5.04 are not
delivered to Banks within 60 days after request for a special determination or
Company and Majority Banks are nable to agree to the Borrowing Base Tests and
resulting Borrowing Base should Majority Banks disapprove of the Borrowing Base
Tests and resulting Borrowing Base proposed by Company. The effective date of
the Borrowing Base determined under this Section 5.04 shall be the first
Business Day of the calendar month succeeding the month that Majority Banks
approve the Borrowing Base as redetermined under this Section 5.04. Also, for
Borrowing Base determinations prior to April 15, 1999, the foregoing shall also
apply to Majority Banks' approval or determination of the Threshold Amount.

     5.05.  Interim Sales of Mineral Properties.

            (a) Sales of Mineral Properties.  After a Borrowing Base has been
     determined, upon the sale by Company of any Mineral Property (other than
     the sale of hydrocarbons after severance in the ordinary course of business
     or the transfer of Mineral Properties to the Proposed Royalty Trust), the
     Borrowing Base shall be reduced, effective on the date of consummation of
     such sale, by an amount which Company certifies to Banks is the Borrowing
     Base value last assigned to such Mineral Property according to the most
     recent Reserve Report and Borrowing Base Certificate delivered to Banks;
     provided, however, that if Majority Banks, for any reason, disapprove of
     the proposed Borrowing Base value certified by Company, then Majority Banks
     shall determine the Borrowing Base value last assigned to such Mineral
     Property according to the most recent Reserve Report and Borrowing Base
     Certificate delivered to Banks; provided, further, that no such reduction
     to the Borrowing Base shall be required with respect to aggregate net sales
     proceeds of up to $5,000,000 during any calendar year during the term of
     the Loan, and provided further, that all such sales shall be subject to the
     provisions of Section 9.07.  Pursuant to the terms of the Purchase and Sale
     Agreement evidencing the EEX Acquisition, at closing of the EEX
     Acquisition, certain of the EEX Properties may be excluded from the EEX
     Acquisition and the purchase price for the EEX Properties may be reduced by
     the value allocated to such excluded EEX Properties, on account of title
     defects and/or adverse environmental conditions.  After the purchase price
     for the EEX 

                                      -39-
<PAGE>
 
     Properties has been reduced by an aggregate amount of $10,000,000 on
     account of such title defects and/or environmental conditions, the
     Borrowing Base shall thereafter be reduced by the loan value assigned to
     any additional properties that are affected by such title defects and/or
     environmental conditions according to the reserve report covering the EEX
     Properties that was delivered by Company to Agents or, if available, the
     most recent Reserve Report deivered to Banks. During the period from the
     Closing Date to April 15, 1999, any reduction to the Borrowing Base
     according to this Section 5.05(a) shall cause a dollar-for-dollar reduction
     to the Threshold Amount. Company's certificate setting forth its proposed
     reduction to the Borrowing Base and Threshold Amount that is required under
     this Section 5.05(a) shall be submitted to Banks at least ten (10) Business
     Days prior to the consummation of any sale or transfer of the Mineral
     Properties the prior consent to which is required by Majority Banks
     according to Section 9.07 or not later than (10) Business Days after the
     consummation of any sale or transfer of the Mineral Properties the prior
     consent to which is not required by Majority Banks according to Section
     9.07.
 
          (b) Formation of Proposed Royalty Trust.  Upon formation of the
     Proposed Royalty Trust, the Borrowing Base shall include the entire
     Borrowing Base value of the undivided interest in the Mineral Properties
     that are assigned and conveyed by Company to the Proposed Royalty Trust for
     so long as Company owns all of the issued and outstanding units in the
     Proposed Royalty Trust.  Company has advised Bank that (a) Company may (but
     has no present plans to) make a public offering of some or all of the units
     in the Proposed Royalty Trust and (b) Company intends to grant options to
     individual members of Company's management to acquire units of the Proposed
     Royalty Trust.  If a public offering is made of the units of the Proposed
     Royalty Trust, the Borrowing Base shall be reduced by an amount equal to
     the amount derived by multiplying (a) the Borrowing Base value assigned to
     the Mineral Properties of the Proposed Royalty Trust by (b) a percentage,
     (i) the numerator of which is the number of units of the Proposed Royalty
     Trust that are acquired by Persons other than Company or any Subsidiary
     pursuant to such public offering and (ii) the denominator of which is the
     number of all issued and outstanding units in the Proposed Royalty Trust.
     The Borrowing Base shall not be reduced upon the issuance of options to
     members of Company's management to acquire units of the Proposed Royalty
     Trust.  If members of Company's management exercise their options to
     acquire any units of the Proposed Royalty Trust (such units acquired by
     Company's management are herein called the "Option Units"), the Borrowing
     Base shall be reduced by multiplying (a) the Borrowing Base value assigned
     to the Mineral Properties of the Proposed Royalty Trust by (b) a
     percentage, (i) the numerator of which is the number Option Units exercised
     by and issued to Company's management and (ii) the denominator of which is
     the number of all issued and outstanding units in the Proposed Royalty
     Trust; provided, however, that there shall be no such reduction to the
     Borrowing Base on account of the issuance of Option Units during any 12-
     month period for the initial $3,000,000 in Borrowing Base value for such
     Option Units issued during such 12-month period (as determined by the
     calculation set forth above).  During the period from the Closing Date to
     April 15, 1999, any reduction to the Borrowing Base according to this
     Section 5.05(b) shall cause a dollar-for-dollar reduction to the Threshold
     Amount.  Company shall submit a certificate to 

                                      -40-
<PAGE>
 
     Banks setting forth its proposed reduction to the Borrowing Base and
     Threshold Amount that is required under this Section 5.05(b) (i) not later
     than ten (10) Business Days after the consummation of a public offering of
     the units of the Proposed Royalty Trust or (ii) as to the transfer of
     Option Units to Company's management, not later than ten (10) Business Days
     after Company has transferred Option Units that have a Borrowing Base value
     of $3,000,000 in the aggregate and thereafter not later than ten (10)
     Business Days after Company has transferred such additional Option Units
     that have a Borrowing Base value of $1,000,000 in the aggregate; provided,
     however, that if Majority Banks, for any reason, disapprove of the proposed
     Borrowing Base value certified by Company, then Majority Banks shall
     determine the Borrowing Base.
 
          (c) Contingency Agreement.  At closing of the EEX Acquisition, if
     Company and EEX enter into the Contingency Agreement, Company shall provide
     to Banks according to Section 7.03(b) hereof a certificate that sets forth
     the Borrowing Base value to be assigned to the EEX Interest that is
     assigned and conveyed to EEX pursuant to the Contingency Agreement.  If
     Company's certificate reflects that the Borrowing Base value of the EEX
     Interest is greater than $10,000,000 but less than $20,000,000, then the
     Borrowing Base shall remain at $560,000,000 and the Threshold Amount shall
     remain at $525,000,000.  If Company's certificate reflects that the
     Borrowing Base value of the EEX Interest is greater than $20,000,000, then
     the Borrowing Base and the Threshold Amount shall each be reduced by the
     amount by which the Borrowing Base value of the EEX Interest as set forth
     in Company's certificate exceeds $15,000,000.  If Company's certificate
     reflects that the Borrowing Base value of the EEX Interest is less than
     $10,000,000, then the Borrowing Base and the Threshold Amount shall be
     increased by the amount by which $15,000,000 exceeds the Borrowing Base
     value of the EEX Interest as set forth in Company's certificate.  If
     Majority Banks do not provide written notice to Agents disapproving the
     Borrowing Base and Threshold Amount set forth in Company's certificate
     within 30 days following the closing date of the EEX Acquisition, then the
     Borrowing Base and Threshold Amount set forth in Company's certificate
     shall remain in effect until redetermined according to the terms of this
     Loan Agreement.  If Majority Banks provide written notice to Agents
     disapproving the Borrowing Base and Threshold Amount set forth in Company's
     certificate within 30 days from the closing date of the EEX Acquisition,
     then Majority Banks shall determine the Borrowing Base value of the EEX
     Interest and the resulting Borrowing Base and Threshold Amount, provided
     that there shall be no reduction to the Borrowing Base and Threshold Amount
     unless Majority Banks determine that the Borrowing Base value to be
     assigned to the EEX Interest exceeds $20,000,000.

     5.06.  Borrowing Base Deficiency.

            (a) Borrowing Base Deficiency.  If after determination of the
Borrowing Base under Section 5.03 hereof, or after a special determination of
the Borrowing Base under Section 5.04 hereof, the Borrowing Base is less than
the Total Outstandings as of the effective date of such Borrowing Base (the
amount by which the Borrowing Base is less than the Total Outstandings is herein
called a "Borrowing Base Deficiency"), then Majority Banks may cause Company to
commence paying to Administrative Agent, for the account of all Banks, a
quarterly 

                                      -41-
<PAGE>
 
principal installment (each a "Scheduled Installment") on the Notes and Loan to
be paid on the last Business Day of each successive Quarterly Period (commencing
on the last Business Day of the Quarterly Period during which Company provides
to Banks the Borrowing Base Deficiency Certificate or Agents provide Company
with written notice of the Borrowing Base Deficiency, whichever is the first to
occur), each such quarterly Scheduled Installment to be that percentage of Net
Revenue for the Quarterly Period (the "Reference Period") preceding the
Quarterly Period in which such installment is due that Company certifies to
Banks will cause the projected Borrowing Base (such projection being set forth
in the Borrowing Base Deficiency Certificate which Company provide to Banks, as
described below) to exceed the projected Total Outstandings (such projection
being set forth in the Borrowing Base Deficiency Certificate which Company
provide to Banks, as described below) as of the first anniversary date of the
effective date of the Borrowing Base Deficiency. That percentage of Net Revenue
which shall be applied to principal payments hereunder shall be referred to as
the "Base Dedicated Percentage." Company's certificate (herein called a
"Borrowing Base Deficiency Certificate") setting forth such Base Dedicated
Percentage of Net Revenue shall be delivered to Banks within ten (10) days
following (i) Company's receipt from Agents of written notice of the existence
of such Borrowing Base Deficiency or (ii) Company's delivery to anks of a
Borrowing Base Certificate that reflects the existence of a Cash Flow Deficiency
upon redetermination of the Borrowing Base set forth in such certificate,
whichever is the first to occur. The Borrowing Base Deficiency Certificate shall
include all computations and derivations relating to the proposed Base Dedicated
Percentage of Net Revenue in reasonable detail, and such certificate shall
further state (i) the Borrowing Base then in effect, (ii) the Total
Outstandings, (iii) the Borrowing Base Deficiency, and (iv) the projected
Borrowing Base and projected Total Outstandings as of the first anniversary date
of the Borrowing Base Deficiency. Regardless of the foregoing provisions of this
Section 5.06(a), Majority Banks shall jointly determine at their discretion the
Base Dedicated Percentage if Majority Banks, based on all information reasonably
available to them, disagree with Company's Borrowing Base Deficiency Certificate
as to the Base Dedicated Percentage of Net Revenue to be in effect or if Company
fails to provide the Borrowing Base Deficiency Certificate. The effective date
of any Borrowing Base Deficiency shall be the effective date of the Borrowing
Base to which causes the Borrowing Base Deficiency to exist.

     If a quarterly Scheduled Installment shall become payable on the basis of a
Base Dedicated Percentage of Net Revenue pursuant to this Section 5.06(a)
hereof, then, together with the payment of such Scheduled Installment, Company
shall deliver to Agents a certificate, in the form of Exhibit "E" attached
hereto, setting forth the revenues, expenses and computation of Net Revenue for
the Reference Period to which such Scheduled Installment relates and calculating
the amount of the Scheduled Installment due in accordance with this Section
5.06(a).  Company's calculation of Net Revenue and other calculations on the
certificate shall be subject to review by Banks, and if Majority Banks determine
that any portion of such certificate is materially incorrect, the calculation of
Net Revenue and applicable Scheduled Installment shall be subject to adjustment
by Majority Banks.  In the event such an adjustment results in the underpayment
by Company of the amount of Scheduled Installment due, then Company shall pay to
Administrative Agent, for the account of Banks, the amount of such underpayment
within five (5) Business Days following Company's receipt of notice from
Administrative Agent of such underpayment.  Further, upon such adjustment all
reasonable third party or out-of-pocket costs 

                                      -42-
<PAGE>
 
incurred by Banks in reviewing the certificate and adjusting the Net Revenue and
Scheduled Installment shall be borne by Company.

     (b)  Supplemental Borrowing Base Deficiency Determination. Within three (3)
Business Days prior to the Business Day that is 180 days following the effective
date of the Borrowing Base Deficiency, Company shall submit to Banks a
certificate (herein called "Supplemental Borrowing Base Deficiency
Certificate"), signed by the chief financial officer of Company, which sets
forth the projected Borrowing Base Deficiency as of (i) 180 days following the
effective date of the Borrowing Base Deficiency and (ii) the anniversary date of
the effective date of the Borrowing Base Deficiency, such Borrowing Base
Deficiency Certificate to include all compilations and derivations relating to
such projections so made by Company. If the Supplemental Borrowing Base
Deficiency Certificate (or Majority Banks' projections if Majority Banks should
disagree with the Supplemental Borrowing Base Deficiency Certificate or if
Company fails to provide such certificate) indicates that the Borrowing Base
Deficiency will not be reduced by sixty percent (60%) or more within 180 days
following the effective date of the Borrowing Base Deficiency, then the Base
Dedicated Percentage shall be automatically adjusted to one hundred percent
(100%) of Net Revenue (less (i) accrued interest due on the Notes during the
applicable Quarterly Period and (ii) Company's actual overhead and general and
administrative expenses (to the extent not already deducted in the determination
of Net Revenue) for the applicable Quarterly Period, which overhead and general
and administrative expenses shall not be materially greater than the overhead
and administrative expenses of Company as reflected in the most recent financial
statements of Company delivered to Banks hereunder) for so long as the Borrowing
Base Deficiency shall exist.

     (c)  Events of Default. Upon the occurrence of a Borrowing Base Deficiency,
an Event of Default shall occur if:

          (i)  the Borrowing Base Deficiency Certificate provided by Company to
Banks (or the determination made by Majority Banks if Majority Banks disagree
with Company's Borrowing Base Deficiency Certificate or if the Company fails to
provide such certificate) indicates that quarterly Scheduled Installments of one
hundred percent (100%) of Net Revenue is not sufficient to cause the projected
Borrowing Base to exceed the projected Total Outstandings as of the first
anniversary date of the effective date of the Borrowing Base Deficiency unless
no later than three (3) Business Days prior to the next ensuing date that a
scheduled installment of interest is due on any of the Subordinated Indebtedness
following the effective date of the Borrowing Base Deficiency Company makes a
principal payment on the Notes in an amount that Agents agree will cause the
projected Borrowing Base to exceed the Total Outstandings as of the date that
such principal payment is made.  The notice from Agents to Company of the
existence of a Borrowing Base Deficiency shall state (in addition to the other
matters set forth above) the amount of the principal payment required to be made
by Company to prevent the occurrence of such Event of Default should the
provisions of this subclause (i) be applicable; or

          (ii) the Borrowing Base Deficiency is not reduced by sixty percent
(60%) or more within 180 days following the effective date of the Borrowing Base
Deficiency unless no later than 180 days following the effective date of the
Borrowing Base Deficiency 

                                      -43-
<PAGE>
 
Company makes a principal payment on the Notes in an amount that Agents agree
will cause the Borrowing Base Deficiency to be reduced by sixty percent (60%) as
of the date that such principal payment is made; or

               (iii) the Supplemental Borrowing Base Deficiency Certificate
provided by Company to Banks (or the determination made Majority Banks if
Majority Banks disagree with Company's Supplemental Borrowing Base Deficiency
Certificate or if Company fails to provide such certificate) indicates that
quarterly Scheduled Installments of one hundred percent (100%) of Net Revenue is
not sufficient to cause the projected Borrowing Base to exceed the projected
Total Outstandings as of the first anniversary date of the effective date of the
Borrowing Base Deficiency unless no later than three (3) Business Days prior to
the next ensuing date that a scheduled installment of interest is due on any of
the Subordinated Indebtedness following 180 days after the effective date of the
Borrowing Base Deficiency Company makes a principal payment on the Notes in an
amount that Agents agree will cause the projected Borrowing Base to exceed the
projected Total Outstandings as of the date that such principal payment is made.
In the event the provisions of this subclause (iii) are applicable, Agents shall
provide notice to Company of the amount of principal payment required to be made
by Company to prevent the occurrence of an Event of Default under this subclause
(iii); or

               (iv)  the Borrowing Base does not exceed the Total Outstandings
as of the anniversary date of the effective date of the Borrowing Base
Deficiency.

   5.07.  Reserve Report and Gas Report Matters.  Each Reserve Report and
Gas Report required to be delivered by Company to Banks pursuant to Sections
5.03 and 5.04 shall utilize in its calculation of the Proved Reserves
attributable to the Mineral Properties the economic variables (including,
without limitation, the prevailing price for oil, gas and other hydrocarbons
produced from the Mineral Properties and the projected adjustments of such
prices) and economic variables, assumptions, computations and other parameters
respecting the projection of the Gas Subsidiaries' Loan Value and the Cash Flow
attributable to the operations of the Gas Marketing Subsidiaries agreed to by
Company and Agents and approved by Majority Banks, or if Company and Agent's
cannot agree to or Majority Banks do not approve of such economic variables and
Gas Report parameters by the dates specified below, then such economic variables
and Gas Report parameters shall be designated by Majority Banks, based upon
Majority Banks' determination of the economic variables and parameters then
being utilized by Majority Banks to evaluate Proved Reserves attributable to oil
and gas properties and gas gathering, processing, and marketing operations for
lending transactions similar to the Loan.  As to the Reserve Report and Gas
Report required under Section 5.03, Company shall provide Agents its proposed
economic variables for the Reserve Report and Gas Report parameters on or before
February 10 of the year in which such Reserve Report and Gas Report are to be
delivered  If Agents agree with such proposed economic variables and parameters,
Agents shall provide such proposed economic variables and parameters to Banks.
If Agents do not agree with such proposed economic variables and parameters,
Agents shall consult with Company in an effort to agree to the proposed economic
variables and parameters, and upon such agreement, Agents shall provide such
proposed economic variables and parameters to Banks (provided, however, if
Agents and Company cannot agree to such proposed economic variables and
paramters, such proposed economic variables and parameters shall be determined
by Majority Banks as set forth herein).  If 

                                      -44-
<PAGE>
 
Majority Banks do not provide written notice to Agents disapproving such
proposed economic variables and parameters by March 1, such economic variables
and parameters shall be utilized in the Reserve Report and Gas Report. If
Majority Banks provide written notice to Agents before March 1 disapproving such
economic variables and parameters, Company and Majority Banks shall attempt to
agree to such economic variables and parameters by March 1, but if Company and
Majority Banks cannot agree on such economic variables and parameters, such
economic variables and parameters shall be determined by Majority Banks as
provided above. As to the Reserve Report and Gas Report required under Section
5.04, Company and Majority Banks shall agree to such economic variables and Gas
Report parameters within ten (10) Business Days following the delivery to
Company of the notice of the special determination of the Borrowing Base under
Section 5.04. In any event, however, if the ultimate price received by Company
for the sale of any oil, gas or other hydrocarbons produced from the Mineral
Properties is established or determined by or subject to a Hedge Agreement, then
the price for such oil, gas or other hydrocarbons for the purpose of computing
Cash Flow shall be that price established or determined by the production of
oil, gas or other hydrocarbons that is subject to such Hedge Agreement.

                                   ARTICLE 6
                                   ---------

                        REPRESENTATIONS AND WARRANTIES
                        ------------------------------

     To induce Banks to make the Loan hereunder, Company represents and warrants
to Banks that:

     6.01.  Organization and Good Standing.  Company, CT Operating and each
Gas Marketing Subsidiary is a corporation duly organized and validly existing
under the laws of the jurisdiction of its incorporation and has the corporate
power and authority required to own its properties and assets, and to transact
the business in which it is engaged and that which it proposes to conduct.
Company, CT Operating and each Gas Marketing Subsidiary is qualified or licensed
to do business in those states wherein it owns or leases property or in which
the conduct of its business requires it so to qualify.

     6.02.  Authorization and Power.  Company has the corporate power and
requisite authority to execute, deliver and perform this Loan Agreement, the
Notes and the other Loan Papers to be executed by Company; Company is duly
authorized to, and has taken all corporate action necessary to authorize Company
to, execute, deliver and perform this Loan Agreement, the Notes and such other
Loan Papers and will continue to be duly authorized to perform this Loan
Agreement, the Notes and such other Loan Papers.  CT Operating and each Gas
Marketing Subsidiary has the corporate power and requisite authority to execute,
deliver and perform the Guaranty and the other Loan Papers to be executed by CT
Operating and each Gas Marketing Subsidiary; CT Operating and each Gas Marketing
Subsidiary is duly authorized to, and has taken all corporate action necessary
to authorize CT Operating and each Gas Marketing Subsidiary to, execute, deliver
and perform the Guaranty and such other Loan Papers and will continue to be duly
authorized to perform the Guaranty and such other Loan Papers.

                                      -45-
<PAGE>
 
     6.03.  No Conflicts or Consents.  Neither the execution and delivery of
this Loan Agreement, the Notes or the other Loan Papers, nor the consummation of
any of the transactions herein or therein contemplated, nor compliance with the
terms and provisions hereof or with the terms and provisions thereof, will
contravene or materially conflict with any provision of law, statute or
regulation to which Company, CT Operating or any Gas Marketing Subsidiary is
subject or any judgment, license, order or permit applicable to Company, CT
Operating or any Gas Marketing Subsidiary, or any indenture, loan agreement,
mortgage, deed of trust, or other agreement or instrument to which Company, CT
Operating or any Gas Marketing Subsidiary is a party (including the April 1997
Indenture and the October 1997 Indenture) or by which Company, CT Operating or
any Gas Marketing Subsidiary may be bound, or to which Company, CT Operating or
any Gas Marketing Subsidiary may be subject, or violate any provision of the
charter or bylaws of Company, CT Operating or any Gas Marketing Subsidiary.  No
consent, approval, authorization or order of any court or governmental authority
or third party is required in connection with the execution and delivery by
Company, CT Operating or any Gas Marketing Subsidiary of the Loan Papers or to
consummate the transactions contemplated hereby or thereby.

     6.04.  Enforceable Obligations.  This Loan Agreement, the Notes and the
other Loan Papers are the legal and binding obligations of Company, enforceable
in accordance with their respective terms, except as limited by bankruptcy,
insolvency or other laws of general application relating to the enforcement of
creditors' rights.  The Guaranty and the other Loan Papers executed by CT
Operating and each Gas Marketing Subsidiary are the legal and binding
obligations of CT Operating and each Gas Marketing Subsidiary, enforceable in
accordance with their respective terms, except as limited by bankruptcy,
insolvency or other laws of general application relating to the enforcement of
creditors' rights.

     6.05.  No Liens.  Except for Permitted Liens, all of the properties and
assets of Company and the Subsidiaries are free and clear of all mortgages,
liens, encumbrances and other adverse claims of any nature.

     6.06.  Financial Condition.  Company has delivered to Banks copies of
the balance sheet of Company as of December 31, 1997, and the related statements
of income and changes in cash flow for the period ended such date, reviewed by
Arthur Andersen, L.L.P., independent certified public accountants, and copies of
the balance sheets of the Subsidiaries and the related statements of income and
changes in cash flow for the period ending December 31, 1997; such financial
statements are true and correct, fairly present the financial condition of
Company and the Subsidiaries as of such date and have been prepared in
accordance with Generally Accepted Accounting Principles applied on a basis
consistent with that of prior periods; as of the date hereof, there are no
obligations, liabilities or indebtedness (including contingent and indirect
liabilities and obligations or unusual forward or long-term commitments) of
Company and any Subsidiary which are (separately or in the aggregate) material
and are not reflected in such financial statements; no changes having a Material
Adverse Effect have occurred in the financial condition or business of Company
or any Subsidiary since December 31, 1997.

     6.07.  Full Disclosure.  There is no material fact that Company has not
disclosed to Banks which could have a Material Adverse Effect on the properties,
business, prospects or 

                                      -46-
<PAGE>
 
condition (financial or otherwise) of Company or any Subsidiary. Neither the
financial statements referred in Section 6.06 hereof, nor any certificate or
statement delivered herewith or heretofore by Company to Administrative Agent or
any Bank in connection with negotiations of this Loan Agreement, contains any
untrue statement of a material fact or omits to state any material fact
necessary to keep the statements contained herein or therein from being
misleading.

     6.08.   No Default.  No event has occurred and is continuing which
constitutes an Event of Default or which, with the lapse of time or giving of
notice or both, would constitute an Event of Default.

     6.09.   Material Agreements.  Neither Company nor any Subsidiary is in
default in any material respect under the April 1997 Indenture or the October
1997 Indenture (including any note or security issued thereunder) or any loan
agreement, indenture, mortgage, security agreement or other material agreement
or obligation to which it is a party or by which any of its properties is bound.

     6.10.   No Litigation.  There are no actions, suits or legal, equitable,
arbitration or administrative proceedings pending, or to the knowledge of
Company threatened, against Company or any Subsidiary that would, if adversely
determined, have a Material Adverse Effect.

     6.11.   Burdensome Contracts.  Neither Company nor any Subsidiary is a
party to, or bound by, any contract which is a burdensome contract having a
Material Adverse Effect on the business, operations or financial condition of
Company or any Subsidiary.

     6.12.   Estimated Oil and Gas Reserves.  Company has heretofore delivered
to Banks copies of all reports requested by Banks (prepared by independent
consulting engineers), which have been obtained by Company and concern the
estimated Proved Reserves and future net revenues attributable to the Mineral
Properties.  The statements of fact contained in said reports with respect to
the character and ownership of the Mineral Properties (including, without
limitation, the respective revenue interest and working interest of Company in
the Mineral Properties as stated therein) and the other factual data furnished
by Company as a basis for the estimates set forth therein are true and correct
in all material respects and do not omit any material fact necessary to make
said statements not misleading.

     6.13.   Use of Proceeds; Margin Stock.  The proceeds of the Loan will be
used by Company solely for the purposes specified in the Section 2.01(d) hereof.
None of such proceeds will be used for the purpose of purchasing or carrying any
"margin stock" as defined in Regulation U or Regulation G of the Board of
Governors of the Federal Reserve System (12 C.F.R. Part 221 and 207), or for the
purpose of reducing or retiring any indebtedness which was originally incurred
to purchase or carry a margin stock or for any other purpose which might
constitute this transaction a "purpose credit" within the meaning of such
Regulation U or Regulation G, if, as a result of purchasing or carrying any
"margin stock", the proceeds of the Loan would be used, directly or indirectly,
for a purpose, whether immediate, incidental or ultimate, which violates or
which would be inconsistent with Regulation U or Regulation G or would cause the
Loan to be a credit regulated or governed by Regulation U or Regulation G.
Company is not engaged in the business of extending credit for the purpose of
purchasing or 

                                      -47-
<PAGE>
 
carrying margin stocks.  Neither Company, any Subsidiary nor any
Person acting on behalf of Company has taken or will take any action which might
cause the Notes or any of the other Loan Papers, including this Agreement, to
violate Regulations U or Regulation G or any other regulations of the Board of
Governors of the Federal Reserve System or to violate Section 7 of the
Securities Exchange Act of 1934 or any rule or regulation thereunder, in each
case as now in effect or as the same may hereinafter be in effect.  Neither
Company nor any Subsidiary owns "margin stock" except for that described in the
financial statements referred to in Section 6.06 hereof.

     6.14.   Taxes.  All tax returns required to be filed by Company or any
Subsidiary in any jurisdiction have been filed, except for such tax returns for
which the failure to timely file will not result in a Material Adverse Effect,
and all taxes (including mortgage recording taxes), assessments, fees and other
governmental charges upon Company or any Subsidiary or upon any of its or their
properties, income or franchises have been paid prior to the time that such
taxes could give rise to a lien thereon, except for such taxes, for which the
failure to timely pay will not result in a Material Adverse Effect.  There is no
proposed tax assessment against Company or any Subsidiary and there is no basis
for such assessment.

     6.15.   Principal Office, Etc.  The principal office, chief executive
office and principal place of business of Company is at 810 Houston Street, Fort
Worth, Texas 76102.  Company maintains its principal records and books at such
address.

     6.16.   ERISA.  (a) No Reportable Event has occurred and is continuing
with respect to any Plan; (b) PBGC has not instituted proceedings to terminate
any Plan; (c) neither Company, any member of the Controlled Group, nor any duly-
appointed administrator of a Plan (i) has incurred any liability to PBGC with
respect to any Plan other than for premiums not yet due or payable or (ii) has
instituted or intends to institute proceedings to terminate any Plan under
Section 4041 or 4041A of ERISA or withdraw from any Multi-Employer Pension Plan
(as that term is defined in Section 3(37) of ERISA); and (d) each Plan of
Company has been maintained and funded in all material respects in accordance
with its terms and with all provisions of ERISA applicable thereto.

     6.17.   Compliance with Law.  Company and the Subsidiaries are in
compliance with all laws, rules, regulations, orders and decrees which are
applicable to Company or any Subsidiary, or its or their properties for which
the failure to comply would have a Material Adverse Effect.

     6.18.   Government Regulation.  Neither Company nor any Subsidiary is
subject to regulation under the Public Utility Holding Company Act of 1935, the
Federal Power Act, the Investment Company Act of 1940, the Interstate Commerce
Act (as any of the preceding acts have been amended), or any other law (other
than Regulation X) which regulates the incurring by Company or any Subsidiary of
indebtedness, including but not limited to laws relating to common contract
carriers or the sale of electricity, gas, steam, water, or other public utility
services.

     6.19.   Insider.  Company is not, and no Person having "control" (as that
term is defined in 12 U.S.C. (S)375(b)(5) or in regulations promulgated pursuant
thereto) of Company is, an 

                                      -48-
<PAGE>
 
"executive officer", "director", or "person who directly or indirectly or in
concert with one or more persons owns, controls, or has the power to vote more
than 10% of any class of voting securities" (as those terms are defined in 12
U.S.C. (S)375(b) or in regulations promulgated pursuant thereto) of any Bank, of
a bank holding company of which any Bank is a subsidiary, or of any subsidiary
of a bank holding company of which any Bank is a subsidiary, or, to the best of
Company's knowledge, of any bank at which Bank maintains a correspondent
account, or of any bank which maintains a correspondent account with any Bank.

     6.20.   No Subsidiaries.  Except for Subsidiaries described on Exhibit
"F" hereto, Company has not formed or acquired any Subsidiary.

     6.21.   Environmental Matters.  Company and any properties or assets
owned by Company or any Subsidiary or predecessors of Company or any Subsidiary
are not in violation of, in any material respect, any Environmental Laws, nor is
there existing, pending or, to the best of Company's knowledge, threatened any
investigation or inquiry (other than those the outcome of which would not
involve substantial fees, penalties, or liability to Company, any Subsidiary, or
any predecessors thereto) by any Governmental Authority pursuant to any
Environmental Laws, nor is there existing or pending any remedial obligations
under any Environmental Laws (other than remedial obligations that may be
customary with respect to the operations or business of Company, any Subsidiary
or any predecessor thereto, or that do not involve substantial fines, penalties
or liability on the part of Company, any Subsidiary or any predecessor thereto),
and this representation will continue to be true and correct following
disclosure to the applicable Governmental Authorities of all relevant facts,
conditions and circumstances, if any, pertaining to all assets of Company, any
Subsidiary and predecessors thereto.  In the ordinary course of its business,
Company conducts an ongoing review of the effect of Environmental Laws on the
business, operations and properties of Company and the Subsidiaries, in the
course of which it identifies and evaluates associated liabilities and costs
(including, without limitation, any capital or operating expenditures required
for clean-up or closure of properties presently or previously owned, any capital
or operating expenditures required to achieve or maintain compliance with
environmental protection standards imposed by law or as a condition of any
license, permit or contract, any related constraints on operating activities,
including any periodic or permanent shutdown of any facility or reduction in the
level of or change in the nature of operations conducted thereat and any actual
or potential liabilities to third parties, including employees, and any related
costs and expenses).  On the basis of this review, Company has reasonably
concluded that Environmental Laws are unlikely to have a Material Adverse Effect
on Company and the Subsidiaries considered as a whole.  Company's breach of any
representation or warranty set forth in this Section 6.21 shall not
automatically cause an Event of Default under Section 10.01(b) hereof.  Instead,
upon becoming aware that Company has breached any representation or warranty set
forth in this Section 6.21, Agents or Majority Banks may cause to be made a
special determination of the Borrowing Base according to Section 5.04 hereof, in
which case that portion of the Mineral Properties as to which the representation
and warranties of this Section 6.21 have been breached shall be excluded from
the Mineral Properties evaluated for the special determination of the Borrowing
Base; provided, however, an Event of Default shall occur if, upon
redetermination of the Borrowing Base, the Borrowing Base as so redetermined has
been reduced by more than 25% from the Borrowing Base in effect immediately
prior to such redetermination.

                                      -49-
<PAGE>
 
     6.22.   Title to Properties.  Subject only to the Permitted Liens: (a)
Company has good and indefeasible title to the Mineral Properties and has
marketable title to all of its other assets and properties; (b) the Gas
Marketing Subsidiaries have good and indefeasible title to all real property
owned by such Subsidiaries and has marketable title to all of their other assets
and properties, (c) all material oil, gas and mineral leases which constitute a
portion of the Mineral Properties are in full force and effect, and (d) Company
has not defaulted on any of its obligations thereunder so as to materially
impair the value of such leases in the aggregate.  Company's breach of any
representation or warranty set forth in this Section 6.22 shall not
automatically cause an Event of Default under Section 10.01(b) hereof.  Instead,
upon becoming aware that Company has breached any representation or warranty set
forth in this Section 6.22, Majority Banks may cause to be made a special
determination of the Borrowing Base according to Section 5.04 hereof, in which
case that portion of the Mineral Properties as to which the representation and
warranties of this Section 6.22 have been breached shall be excluded from the
Mineral Properties evaluated for the special determination of the Borrowing
Base; provided, however, an Event of Default shall occur if, upon
redetermination of the Borrowing Base, the Borrowing Base as so redetermined has
been reduced by more than 25% from the Borrowing Base in effect immediately
prior to such redetermination.

     6.23.   Gas Marketing Subsidiaries' Obligations.  With respect to the
contractual obligations of the Gas Marketing Subsidiaries, in all material
respects:  (i) all are in full force and effect and are the valid and legally
binding obligations of the parties thereto and are enforceable in accordance
with their respective terms; (ii) no Gas Marketing Subsidiary is in breach or
default with respect to any of its material obligations; (iii) all material
payments due thereunder have been made; (iv) no other party to any document,
agreement or contract evidencing such obligations (or any successor in interest
thereto) is in breach or default with respect to any of their material
obligations thereunder; and (v) neither any Gas Marketing Subsidiary nor any
other party to any document agreement or contract evidencing such obligations
has given or threatened to give notice of any action to terminate, cancel,
rescind or procure a juridical reformation of any document agreement or contract
evidencing such obligations or any provision thereof.

     6.24.   Formation of Proposed Royalty Trust.  If Company forms the
Proposed Royalty Trust, then until Company makes a public offering of units of
the Proposed Royalty Trust, Sections 6.05, 6.07, 6.09, 6.10, 6.11, 6.14, 6.17,
6.18, 6.21 and 6.22 shall be deemed amended to include conforming
representations concerning the Proposed Royalty Trust according to the context
of the representations in such sections.

     6.25.   Representations and Warranties.  Each Request for Borrowing shall
constitute, without the necessity of specifically containing a written
statement, a representation and warranty by Company that no Event of Default
exists and that all representations and warranties contained in this Article 8
or in any other Loan Paper are true and correct at and as of the date the
Borrowing is to be made.

     6.26.   Survival of Representations, Etc.  All representations and
warranties by Company herein shall survive delivery of the Notes and the making
of the Loan, and any investigation at any time made by or on behalf of Banks
shall not diminish Banks' right to rely thereon.

                                      -50-
<PAGE>
 
                                   ARTICLE 7
                                   ---------

                             CONDITIONS PRECEDENT
                             --------------------

   7.01.  Commitment.  The obligation of each Bank to make its Advances
under its Commitment is subject to the condition precedent that, on or before
the Closing Date, Administrative Agent shall have received for each Bank the
following, each dated as of the date of such Advance, in form and substance
satisfactory to Administrative Agent and such Bank:

          (a) Notes.  A duly executed Note of each Bank, in the form of Exhibit
"A" attached hereto with appropriate insertions.

          (b) Guaranties.  The unconditional Guaranties of the Loan executed by
CT Operating and each of the Gas Marketing Subsidiaries.

          (c) Opinion of Company's Counsel.  A favorable opinion of Messrs.
Kelly, Hart & Hallman, P.C., counsel for Company, CT Operating and the Gas
Marketing Subsidiaries, as to the matters covered in Exhibit "G" hereto.

          (d) Officers' Certificate.  A certificate signed by a duly authorized
officer of Company stating that (to the best knowledge and belief of such
officer, after reasonable and due investigation and review of matters pertinent
to the subject matter of such certificate):  (i) all of the representations and
warranties contained in Article 6 hereof, and the other Loan Papers are true and
correct as of the Closing Date; and (ii) no event has occurred and is continuing
which constitutes an Event of Default or which, with the lapse of time or the
giving of notice or both, would constitute an Event of Default.

          (e) Corporate General Certificates.  Corporate General Certificates
for Company, CT Operating and the Gas Marketing Subsidiaries, each in the form
attached hereto as Exhibit "H" with the appropriate blanks completed, each dated
as of the Closing Date.

          (f) Environmental Certificate.  A certificate signed by a duly
authorized officer of Company, stating that Company has reviewed the effect of
Environmental Laws on the Mineral Properties and the properties of the Gas
Marketing Subsidiaries, and associated liabilities and costs, and on the basis
of such review, Company is not, in any material respect, in violation of any
Environmental Laws, and the Company reasonably believes that Environmental Laws
then in effect are unlikely to have a Material Adverse Effect on Company or its
Subsidiaries considered as a whole.

          (g) Financial Statements.  Current financial statements and
information of Company and its Subsidiaries in form and substance satisfactory
to Banks, accompanied by a certificate executed by the chief financial officer
of Company, certifying that the attached financial statements are true and
correct in all material respects.

          (h) Subsidiaries.  A schedule of all Subsidiaries of Company.

                                      -51-
<PAGE>
 
          (i) Insurance.  Certificates of insurance or other evidence
satisfactory to Banks that Company maintains the insurance covering required by
Section 8.13 hereof.

          (j) Up-Front Fee.  Company shall have paid to Administrative Agent the
fee required to be paid by Company pursuant to that certain fee letter agreement
dated March 23, 1998 among Company, Agents and Arrangers.

          (k) Additional Information.  Such other information and documents as
may reasonably be required by Administrative Agent, either Agent, Banks or their
counsel.

   7.02.  All Advances.  The obligation of each Bank to make any Advance
under this Loan Agreement (including the initial Advance) shall be subject to
the following conditions precedent:

          (a) No Defaults or Borrowing Base Deficiency.  As of the date of the
making of such Advance or conversion, (i) there exists no Event of Default or
event which with notice or lapse of time or both would constitute an Event of
Default and/or (ii) there exists no Borrowing Base Deficiency.

          (b) Compliance with Loan Agreement.  Company shall have performed and
complied with all agreements and conditions contained herein which are required
to be performed or complied with by Company before or at the date of such
Advance or conversion.

          (c) No Material Adverse Change.  As of the date of making such Advance
or conversion, no material adverse change has occurred in the business or
financial condition of Company or any of the Subsidiaries.

          (d) Borrowing Base Availability.  The making of such Advance shall not
cause the Total Outstandings to exceed the Borrowing Base then in effect.

          (e) Request for Borrowing.  In the case of any Borrowing,
Administrative Agent shall have received from Company a Request for Borrowing in
the form of either Exhibit "B", "C" or "D" attached hereto, dated as of the date
of such Borrowing and signed by an authorized officer of Company, all of the
statements of which shall be true and correct, certifying that, as of the date
thereof, (i) all of the representations and warranties of Company contained in
this Loan Agreement and each of the Loan Papers executed by Company are true and
correct, except that, if the Borrowing represents a rollover or conversion of a
prior Borrowing but does not constitute an Advance for new money, Company shall
not be required to warrant or represent that no Material Adverse Effect has
occurred in the financial condition or business of Company or a Subsidiary as
provided in Section 6.06, (ii) no event has occurred and is continuing, or would
result from the Borrowing, which constitutes an Event of Default or which, with
the lapse of time or giving of notice or both, would constitute an Event of
Default, and (iii) such other facts as any Bank may reasonably request.

                                      -52-
<PAGE>
 
          (f) Representations and Warranties.  The representations and
warranties contained in Article 6 hereof shall be true in all respects on the
date of making of such Advance or conversion, with the same force and effect as
though made on and as of that date.

          (g) Bankruptcy Proceedings.  No proceeding or case under the United
States Bankruptcy Code shall have been commenced by or against Company or any of
its Affiliates.

   7.03.  EEX Acquisition.  In addition to the conditions precedent set
forth in Section 7.02, the obligation of each Bank to make its Advance to
Company to finance Company's purchase of the EEX Properties to increase the
Borrowing Base and the Commitment to the amounts set forth herein shall be
subject to the following additional conditions precedent:

          (a) Environmental Assessment.  A Phase I environmental assessment
prepared by an independent environmental consultant approved by Agents covering
the EEX Properties to be acquired by Company under the EEX Acquisition,
evidencing that there are no violations of any Environmental Laws respecting the
EEX Properties that are likely to have a Material Adverse Effect on Company or
its Subsidiaries considered as a whole.

          (b) Contingency Agreement.  If Company and EEX enter into the
Contingency Agreement, Company shall provide Agents a copy of the Contingency
Agreement and Company shall provide Banks a certificate which sets forth the
proposed Borrowing Base value assigned to the EEX Interest and the resulting
Borrowing Base and Threshold Amount after giving effect to the proposed
Borrowing Base value of the EEX Interest.

          (c) Title Information.  Supplemental title opinions, updated title
reports prepared by a landman acceptable to Agents, existing title opinions,
assignments, division orders, and/or other evidence of title requested by
Agents, covering the properties to be acquired by Company pursuant to the EEX
Acquisition evidencing that (subject to Permitted Liens) Company shall have good
and marketable title to such properties that constitute not less than 60% of the
value of all of the EEX Properties to be acquired pursuant to the EEX
Acquisition, and assignments and other instruments of conveyance from EEX to
Company that vest title to the EEX Properties to be acquired pursuant to the EEX
Acquisition in Company.

                                   ARTICLE 8
                                   ---------

                             AFFIRMATIVE COVENANTS
                             ---------------------

   So long as Banks have any commitment to make Advances hereunder, and until
payment in full of the Notes and the performance of the Obligation, Company
agrees that (unless Majority Banks shall otherwise consent in writing):

   8.01.  Financial Statements, Reports and Documents.  Company shall deliver to
Banks each of the following:

          (a) Quarterly Statements.  As soon as available, and in any event
within sixty (60) days after the end of each Quarterly Period (except the last)
copies of the consolidated and 

                                      -53-
<PAGE>
 
consolidating balance sheet of Company and the Subsidiaries (exclusive of WTW
Properties, Inc., CT Operating and Cross Timbers Trading Company) as of the end
of such Quarterly Period, and statements of income and retained earnings and
changes in cash flow of Company and the Subsidiaries (exclusive of WTW
Properties, Inc., CT Operating and Cross Timbers Trading Company) for that
Quarterly Period and for the portion of the Fiscal Year ending with such period,
in each case setting forth in comparative form the figures for the corresponding
period of the preceding fiscal year, all in reasonable detail, and certified by
the chief financial officer of Company as being true and correct and as having
been prepared in accordance with Generally Accepted Accounting Principles,
subject to year-end audit and adjustments;

          (b) Annual Statements.  As soon as available and in any event within
105 days after the close of each fiscal year of Company, copies of the
consolidated and consolidating balance sheet of Company and the Subsidiaries
(exclusive of WTW Properties, Inc., CT Operating and Cross Timbers Trading
Company) as of the close of such fiscal year and statements of income and
retained earnings and changes in cash flow of Company and Subsidiaries
(exclusive of WTW Properties, Inc., CT Operating and Cross Timbers Trading
Company) for such fiscal year, in each case setting forth in comparative form
the figures for the preceding fiscal year, all in reasonable detail and
accompanied by an opinion thereon (which shall not be qualified) of a firm of
independent public accountants of recognized national standing selected by
Company and satisfactory to Majority Banks, to the effect that such financial
statements have been prepared in accordance with Generally Accepted Accounting
Principles consistently maintained and applied (except for changes in which such
accountants concur) and that the examination of such accounts in connection with
such financial statements has been made in accordance with generally accepted
auditing standards and, accordingly, includes such tests of the accounting
records and such other auditing procedures as were considered necessary in the
circumstances;

          (c) Reserve Reports.  Each Reserve Report required to be delivered by
Company to Banks pursuant to Sections 5.03 and 5.04, and within the time period
prescribed in Section 5.07 for the delivery of each such Reserve Report,
prepared by the petroleum engineering firm of Miller and Lents or such other
firm of independent petroleum engineers approved by Majority Banks, evaluating
the Mineral Properties and prepared in accordance with the customary standards
and procedures of the petroleum industry;

          (d) Gas Reports.  Each Gas Report required to be delivered by Company
to Banks pursuant to Sections 5.03 and 5.04, and within the time period
prescribed in Section 5.07 for the delivery of each such Gas Report.

          (e) Audit Reports.  Promptly upon receipt thereof, one copy of each
written report submitted to Company by independent accountants in any annual,
quarterly or special audit made, it being understood and agreed that all audit
reports which are furnished to Banks pursuant to this Article shall be treated
as confidential, but nothing herein contained shall limit or impair Banks right
to disclose such reports to any appropriate Governmental Authority or to use
such information to the extent pertinent to an evaluation of the Obligation or
to enforce compliance with the terms and conditions of this Loan Agreement, or
to take any lawful action which Banks deem necessary to protect their interests
under this Loan Agreement;

                                      -54-
<PAGE>
 
          (f) SEC and Other Reports.  Promptly upon their becoming available,
one copy of each press release, financial statement, report, notice or proxy
statement sent by Company to its shareholders or partners generally and of each
regular or periodic report, registration statement or prospectus filed by
Company with any securities exchange or the Securities and Exchange Commission
or any successor agency, and of any order issued by any Governmental Authority
in any proceeding to which Company is a party;

          (g) Schedule of Subsidiaries.  Within ninety (90) days after the end
of each fiscal year, a schedule of all Subsidiaries of Company.

          (h) Quarterly Hedging Reports.  Within sixty (60) days after the end
of each Quarterly Period, a statement prepared by Company and certified as being
true and correct by the chief financial officer of Company, setting forth in
reasonable detail all Hedge Agreements to which any production of oil, gas or
other hydrocarbons from the Mineral Properties is then subject, together with a
statement of Company's position with respect to each such Hedge Agreement,
provided, however, if the price of any of the oil, gas or other hydrocarbons
produced from the Mineral Properties is subject to a Hedge Agreement, then
Company shall promptly notify Banks if such Hedge Agreement is terminated,
modified, amended or altered prior to the end of its contractual term, or if
there is an amendment, adjustment or modification of the price of any of the
oil, gas or other hydrocarbons produced from the Mineral Properties that is
subject to or established by a Hedge Agreement.

          (i) Dividend Certificate.  Upon delivery of the financial statements
to be delivered by Company pursuant to Sections 8.01(a) and (b), a certificate
executed by the chief financial officer or chief executive officer of Company
setting forth Company's net cash flow from operations (as that term is used in
Section 9.03 of this Agreement) for each of the preceding four-quarter periods
and the amount of Dividends paid by Company and the amount expended by Company
to repurchase any of its shares of stock during such four-quarter periods.
 
          (j) Trustee/Holder Notices.  Promptly upon the receipt thereof, a copy
of each written notice, request or statement given or furnished by the Trustee
or any holder of any of the Subordinated Indebtedness which alleges or asserts
that an event of default has occurred under the terms of the April 1997
Indenture or the October 1997 Indenture or with the lapse of time or giving of
notice, or both, an event of default would exist under the terms of the April
1997 Indenture or the October 1997 Indenture or which evidences or indicates
that Trustee or any holder of any of the Subordinated Indebtedness intends to
accelerate the maturity of any of the Subordinated Indebtedness or exercise any
remedies to enforce payment of or collection of any of the Subordinated
Indebtedness.

          (k) Compliance Certificate.  Upon delivery of the financial statements
to be delivered by Company pursuant to Sections 8.01(a) and (b), a certificate
executed by the chief financial officer or chief executive officer of Company,
stating that a review of the activities of Company during such fiscal quarter
has been made under his supervision and that Company has observed, performed and
fulfilled each and every obligation and covenant contained herein and is not in
default under any of the same or, if any such default shall have occurred,
specifying the 

                                      -55-
<PAGE>
 
nature and status thereof, and such certificate shall include all computations
required to show, in sufficient detail, the components of Company's Consolidated
Current Assets and Consolidated Current Liabilities for the purpose of
establishing Company's compliance with the current ratio as set forth in Section
9.09 hereof; and

          (l) Proposed Royalty Trust.  Upon formation of the Proposed Royalty
Trust, all information concerning the transactions pursuant to which the
Proposed Royalty Trust is formed, including the trust indenture therefor and the
assignments and conveyances of Mineral Properties from Company to the Proposed
Royalty Trust.

          (m) Financial Information Concerning Proposed Royalty Trust.  If
Company forms the Proposed Royalty Trust, (i) as soon as available, and in any
event within sixty (60) days after the end of each Quarterly Period (except the
last), Company shall provide to Banks copies of all financial statements of the
Proposed Royalty Trust for that Quarterly Period and for the portion of the
Fiscal Year ending with such period, in each case setting forth in comparative
form the figures for the corresponding period of the preceding fiscal year, all
in reasonable detail, and certified by the chief financial officer of Company
as, to the best of his knowledge, being true and correct and as having been
prepared in accordance with Generally Accepted Accounting Principles as they may
apply to royalty trusts in general, subject to year-end audit and adjustments,
and (ii) as soon as available and in any event within 105 days after the close
of each fiscal year of the Proposed Royalty Trust, Company shall provide Banks
copies of all financial statements of the Proposed Royalty Trust for such fiscal
year setting forth in comparative form the figures for the preceding fiscal
year, all in reasonable detail and accompanied by an opinion thereon (which
shall not be qualified) of a firm of independent public accountants of
recognized national standing selected by Company and satisfactory to Majority
Banks, to the effect that such financial statements have been prepared in
accordance with Generally Accepted Accounting Principles as they may apply to
royalty trusts in general consistently maintained and applied (except for
changes in which such accountants concur) and that the examination of such
accounts in connection with such financial statements has been made in
accordance with generally accepted auditing standards and, accordingly, includes
such tests of the accounting records and such other auditing procedures as were
considered necessary in the circumstances to conventionally audit a royalty
trust.

          (n) Other Information.  All information concerning the April 1997
Indenture, the October 1997 Indenture, the Subordinated Indebtedness and such
other information concerning the business, properties or financial condition of
Company any Subsidiary, or the Proposed Royalty Trust, as Administrative Agent
or any Bank shall reasonably request.

   8.02.  Payment of Taxes and Other Indebtedness.  Company will, and will
cause each of the Subsidiaries to, pay and discharge (i) all taxes, assessments
and governmental charges or levies imposed upon it or upon its income or
profits, or upon any property belonging to it, before delinquent, (ii) all
lawful claims (including claims for labor, materials and supplies), which, if
unpaid, might become a Lien upon any of its property and (iii) all of its other
Indebtedness, except as prohibited hereunder; provided, however, that Company
and each of the Subsidiaries shall not be required to pay any such tax,
assessment, charge, levy or claims for labor, materials and supplies if and so
long as the amount, applicability or validity thereof shall currently be

                                      -56-
<PAGE>
 
contested in good faith by appropriate proceedings and appropriate accruals and
reserves therefor have been established in accordance with Generally Accepted
Accounting Principles.

     8.03.   Maintenance of Existence and Rights; Conduct of Business.
Company will, and will cause each of its Subsidiaries to, preserve and maintain
its corporate existence and all of its rights, privileges and franchises
necessary or desirable in the normal conduct of its business, and conduct its
business in an orderly and efficient manner consistent with good business
practices and in accordance with all valid regulations and orders of any
Governmental Authority.

     8.04.   Notice of Default.  Company will furnish to Banks, immediately
upon becoming aware of the existence of any condition or event which constitutes
an Event of Default or which, with the lapse of time or giving of notice, or
both, would become an Event of Default, a written notice specifying the nature
and period of existence thereof and the action which Company is taking or
proposes to take with respect thereto.

     8.05.   Other Notices.  Company will, and will cause each of the
Subsidiaries to, promptly notify Banks of (a) any material adverse change in its
financial condition or its business which is unique to Company specifically, but
not the oil and gas industry generally (unless such change, though not unique to
Company or any Subsidiary, has a Material Adverse Effect on Company), (b) any
default under the April 1997 Indenture, the October 1997 Indenture or any other
material agreement, contract or other instrument to which it is a party or by
which any of its properties are bound, or any acceleration of the maturity of
any of the Subordinated Indebtedness or any other Indebtedness owing by Company
or any Subsidiary in an amount in excess of $100,000, (c) any material adverse
claim against or affecting Company or any Subsidiary or any of its or their
properties in an amount in excess of $500,000, and (d) the commencement of, and
any material determination in, any litigation with any third party or any
proceeding before any Governmental Authority affecting Company or any Subsidiary
which, if determined in a manner contrary or adverse to any of such Persons,
would have a Material Adverse Effect on any of such Persons.

     8.06.   Compliance with Loan Papers.  Company will promptly comply with
any and all covenants and provisions of this Loan Agreement, the Notes and all
other of the Loan Papers.  Each Gas Marketing Subsidiary will promptly comply
with any and all covenants and provisions of the Guaranty and all other Loan
Papers executed by such Gas Marketing Subsidiary.

     8.07.   Compliance with Material Agreements.  Company will, and will
cause each Subsidiary to, comply in all material respects with all material
agreements, indentures, mortgages or documents binding on it or affecting its
properties or business (inclusive of the April 1997 Indenture and the October
1997 Indenture and any note or security issued thereunder).

     8.08.   Operations and Properties.  Company will, and will cause each
Subsidiary to, act prudently and in accordance with customary industry standards
in managing or operating its assets, properties, business and investments;
Company will and will cause each Subsidiary to, keep in good working order and
condition, ordinary wear and tear excepted, all of its assets and properties
which are necessary to the conduct of its business; provided Company shall never
be 

                                      -57-
<PAGE>
 
deemed obligated to rework, recomplete, redrill or otherwise maintain any
well or production facility when, in Company's judgment, it would be imprudent
or uneconomic to do so.

     8.09.   Books and Records; Access.  Company will, upon request by any
Agent, give any representative of each Bank access during all business hours to,
and permit such representative to examine, copy or make excerpts from, any and
all books, records and documents in the possession of Company and relating to
its affairs, and to inspect any of the properties of Company or any Subsidiary.
Company will, and will cause each Subsidiary to, maintain complete and accurate
books and records of its transactions in accordance with good accounting
practices.

     8.10.   Compliance with Law.  Company will, and will cause each
Subsidiary to, comply with all applicable laws, rules, regulations, and all
orders of any Governmental Authority applicable to it or any of its property,
business operations or transactions, a breach of which could have a Material
Adverse Effect on Company or any Subsidiary.

     8.11.   Leases.  Company will, to the extent failure to do any of the
matters set forth below would have a Material Adverse Effect:  pay and discharge
promptly, or cause to be paid and discharged promptly, all rentals, delay
rentals, royalties, overriding royalties, payments out of production and other
indebtedness or obligations accruing under, and perform or cause to be performed
each and every act, matter or thing required by each and all of, the oil and gas
leases and all other agreements and contracts constituting or affecting the
Mineral Properties, and do all other things necessary to keep unimpaired its
rights thereunder and prevent any forfeiture thereof or default thereunder, and
operate or cause to be operated such properties in a diligent, careful and
efficient manner and in compliance with all applicable proration and
conservation laws and all applicable rules and regulations of every Governmental
Authority, whether state, federal, municipal or other jurisdiction, from time to
time constituted to regulate the development and operations of oil and gas
properties and the production and sale of oil, gas and other hydrocarbons
therefrom.

     8.12.   Development and Maintenance.  Company will maintain (or cause to
be maintained) the oil and gas leases, wells, units and acreage to which the
Mineral Properties pertain in a prudent manner consistent with good oilfield
practices.

     8.13.   Insurance.  Company will, and will cause each Subsidiary to,
maintain workmen's compensation insurance (but only to the extent any of such
Persons has any employees), liability insurance and insurance on its properties,
assets and business, now owned or hereafter acquired, against such casualties,
risks and contingencies, and in such types and amounts, as are consistent with
customary practices and standards of companies engaged in similar business.  In
case of any fire, accident or other casualty causing loss or damage to any
properties of Company or any Subsidiary, the proceeds of any such insurance
policies that are not utilized by Company to repair or replace damaged or
destroyed properties or assets which in the aggregate exceed $1,000,000 in any
calendar year shall be paid to Administrative Agent, for the account of Banks,
and applied as a mandatory prepayment on the Loan, as the case may be, and, if
such loss or damage relates to any Mineral Property, the Borrowing Base shall be
reduced by an amount that Company certifies to Banks is the Borrowing Base value
last assigned to such property according 

                                      -58-
<PAGE>
 
to the most recent Reserve Report, Gas Report and Borrowing Base Certificate
delivered to Banks; provided, however, that Majority Banks shall determine such
assigned value if Majority Banks disapprove of the proposed value assigned to
such properties by Company.

     8.14.   Authorization and Approvals.  Company will, and will cause each
Subsidiary to, promptly obtain, from time to time at its own expense, all such
governmental licenses, authorizations, consents, permits and approvals as may be
required to enable it to comply with its obligations hereunder and under the
other Loan Papers.

     8.15.   Experienced Management.  Company will, and will cause each
Subsidiary to, at all times hire and retain management and supervisory personnel
adequate for the proper management, supervision and conduct of its properties,
business and operation.

     8.16.   ERISA Compliance.  Company shall (a) at all times, make prompt
payment of all contributions required under all Plans and required to meet the
minimum funding standard set forth in ERISA with respect to its Plans; (b)
notify Administrative Agent immediately of any fact, including, but not limited
to, any Reportable Event arising in connection with any of its Plans, which
might constitute grounds for termination thereof by the PBGC or for the
appointment by the appropriate United States District Court of a trustee to
administer such Plan, together with a statement, if requested by Administrative
Agent, as to the reason therefor and the action, if any, proposed to be taken
with respect thereto; and (c) furnish to Administrative Agent, upon its request,
such additional information concerning any of its Plans as may be reasonably
requested.

     8.17.   Further Assurances.  Company will, and will cause each Subsidiary
to, make, execute or endorse, and acknowledge and deliver or file or cause the
same to be done, all such vouchers, invoices, notices, certifications,
additional agreements, undertakings, or other assurances, and take any and all
such other action, as Majority Banks may, from time to time, deem reasonably
necessary or proper in connection with the Loan Agreement or any of the other
Loan Papers, or the obligations of Company hereunder or thereunder.

     8.18.   Environmental.  Company will provide to Agents copies of all
notices received from or required to be made to (when sent) any Governmental
Authority (other than notices routinely received or submitted in the ordinary
course of business) relating to the release or threatened release of Hazardous
Substances by Company or any Subsidiary in connection with any of the assets or
properties of Company or the Subsidiaries that is reportable under CERCLA or any
other Environmental Law now or hereafter in effect (other than those reportable
releases that do not and will not involve substantial fines, penalties on part
of Company, any Subsidiary or any predecessors thereto).  COMPANY AGREES TO
INDEMNIFY AND HOLD BANKS HARMLESS, FROM AND AGAINST ANY AND ALL FINES,
PENALTIES, CLEANUP COSTS AND ASSESSMENTS LEVIED BY ANY GOVERNMENTAL AUTHORITY,
TOGETHER WITH ALL CLAIMS, LIABILITIES, CAUSES OF ACTION, DAMAGES, COSTS AND
EXPENSES (INCLUDING ATTORNEYS' FEES AND COURT COSTS BUT EXCLUDING CLAIMS,
LIABILITIES, ETC. ARISING OUT OF THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF
ANY BANK), NOW EXISTING OR HEREAFTER ARISING, ASSERTED AGAINST OR INCURRED BY
BANKS ARISING 

                                      -59-
<PAGE>
 
OUT OF OR IN CONNECTION WITH THE PRESENCE, STORAGE, DISCHARGE, USE, DISPOSAL,
TRANSPORTATION OR REMEDIATION OF ANY HAZARDOUS SUBSTANCES (AS DEFINED IN CERCLA)
ON OR ABOUT ANY OF THE ASSETS OR PROPERTIES OF COMPANY AND THE SUBSIDIARIES IN
VIOLATION OF ANY ENVIRONMENTAL LAWS AFFECTING ANY OF THE ASSETS OR PROPERTIES OF
COMPANY OR THE SUBSIDIARIES. THIS INDEMNITY SHALL SURVIVE THE PAYMENT IN FULL OF
THE OBLIGATION. Prior to acquiring any property or asset (including the purchase
of any assets permitted under Section 9.13 hereof), Company shall review the
effect of Environmental Laws on the property or asset to be acquired, and based
upon such review, Company shall not acquire such property or asset if Company
would become liable for any then existing breach or violation, in any material
respect, of any Environmental Laws affecting such property or asset.

     8.19.   Pledge of Properties.  In addition to the other rights and
remedies of Banks provided herein, upon the occurrence of a Borrowing Base
Deficiency, Majority Banks may require (i) Company to grant to Banks as security
for the performance by Company of the Notes and the Obligation of Company
hereunder, a valid, enforceable, perfected, first priority and the only Lien in
(a) the Mineral Properties (subject to Permitted Liens), and in all mineral
production therefrom or attributable thereto and in all related accounts, wells,
pipes, personal property and fixtures, to the extent of Company's right, title
and interest in such Mineral Properties and (ii) the Gas Marketing Subsidiaries
to grant to Banks as security for the performance by Company of the Notes and
Obligation hereunder, a valid, enforceable, perfected, first priority and only
Lien (subject to Permitted Liens) in the properties, assets, contracts, contract
rights, accounts and accounts receivables of the Gas Marketing Subsidiaries and
(b) if the Proposed Royalty Trust is formed, Company's units in the Proposed
Royalty Trust.  Such Liens described in the foregoing sentence shall be granted
pursuant to, and more fully described in, deeds of trust, mortgages, security
agreements, pledge agreements, assignments of production, financing statements
and other documents (herein called the "Collateral Documents") which are in form
and substance satisfactory to Banks and which will be executed by Company and
the Gas Marketing Subsidiaries and delivered to Agents within 30 days following
Agents' written notice requesting Company's and the Gas Marketing Subsidiaries'
execution and delivery of such Collateral Documents.

     8.20.   Gas Marketing Subsidiaries Guaranties.  If Company should
subsequently form any additional Gas Marketing Subsidiaries, Company shall cause
each such Gas Marketing Subsidiary to unconditionally guarantee the Loan
pursuant to a form of guaranty agreement substantially in the form of the
guaranty agreement of the Loan executed by CT Operating and the Gas Marketing
Subsidiaries at the Closing Date, such guaranty agreement to be delivered to
Agents within 30 days following Agents' written notice requesting such guaranty
agreement.

     8.21.   Guaranty of Cross Timbers Trading Company.  If Cross Timbers
Trading Company should subsequently acquire, own or hold material assets,
Company shall cause Cross Timbers Trading Company to unconditionally guarantee
the Loan pursuant to a form of guaranty agreement substantially in the form of
the guaranty agreement of the Loan executed by CT Operating and the Gas
Marketing Subsidiaries at the Closing Date, such guaranty agreement to 

                                      -60-
<PAGE>
 
be delivered to Agents within 30 days following Agents' written notice
requesting such guaranty agreement.

     8.22.     Formation of Proposed Royalty Trust.  If Company forms the
Proposed Royalty Trust, then until Company makes a public offering of the units
of the Proposed Royalty Trust, Sections 8.02, 8.03, 8.05, 8.07, 8.08, 8.09,
8.10, 8.14, 8.17 and 8.18 shall be deemed amended to include conforming
affirmative covenants concerning the Proposed Royalty Trust according to the
context of the affirmative covenants in such sections, and Company shall cause
the Proposed Royalty Trust to comply with such covenants as amended to include
the Proposed Royalty Trust.

                                     ARTICLE 9
                                     ---------

                                NEGATIVE COVENANTS
                                ------------------

     So long as Banks have any commitment to make Advances hereunder, and until
payment in full of the Notes and the performance of the Obligation, Company
agrees that (unless Majority Banks shall otherwise consent in writing):

     9.01.     Limitation on Indebtedness.  Company will not, and will not
permit any Subsidiary to, incur, create, contract, assume, have outstanding,
guarantee or otherwise be or become, directly or indirectly, liable in respect
of, any Indebtedness, except (i) Indebtedness arising out of this Loan
Agreement, (ii) the Subordinated Indebtedness; provided that (a) the principal
amount of the Subordinated Indebtedness issued under the April 1997 Indenture
shall not exceed $125,000,000 and the principal amount of the Subordinated
Indebtedness issued under the October 1997 Indenture shall not exceed
$175,0000,000, (b) the interest rate payable on the Subordinated Indebtedness
issued under the April 1997 Indenture shall not exceed nine and one-fourth
percent (9 1/4%) per annum and the interest rate payable on the Subordinated
Indebtedness issued under the October 1997 Indenture shall not exceed eight and
three-fourths percent (8 3/4%), and (c) the maturity date of the Subordinated
Indebtedness issued under the April 1997 Indenture shall not be sooner than
April 1, 2007 and the maturity date of the Subordinated Indebtedness issued
under the October 1997 Indenture shall not be sooner than November 1, 2009,
(iii) Indebtedness, excluding Permitted Margin Debt, secured by the Permitted
Liens, (iv) Permitted Margin Debt, (v) current liabilities for taxes and
assessments incurred in the ordinary course of business and other liabilities
incurred in the ordinary course of business which are currently being contested
in good faith and adequate reserves therefor are being maintained according to
Generally Accepted Accounting Principles, (vi) current amounts payable or
accrued of other claims (other than for borrowed funds or purchase money
obligations) incurred in the ordinary course of business provided that all such
liabilities, accounts and claims shall be promptly paid and discharged when due
or in conformity with customary trade terms, unless such liabilities are
currently being contested in good faith and adequate reserves therefor are being
maintained according to Generally Accepted Accounting Principles, (vii)
Indebtedness of Company and the Subsidiaries not otherwise included in the
preceding subclauses of this Section 9.01 that is  reflected in the audited
consolidated financial statement of Company and the Subsidiaries as of December
31, 1997, (viii) Indebtedness evidenced by or created under the Lease
Agreements, (ix) Indebtedness under any Hedge Agreements that are permitted
according to Section 9.18 hereof, (x) Indebtedness evidenced by any Interest
Swap 

                                      -61-
<PAGE>
 
Agreement, provided such agreement is entered into for business purposes
respecting any then existing Indebtedness of Company, and (xi) such other
Indebtedness of Company and the Subsidiaries (in the aggregate) not exceeding
$5,000,000 at any one time outstanding, exclusive of any Indebtedness between
Company and the Subsidiaries.

     9.02.     Negative Pledge.  Company will not, and will not permit any
Subsidiary to, create or suffer to exist any mortgage, pledge, security
interest, conditional sale or other title retention agreement, charge,
encumbrance or other Lien (whether such interest is based on common law,
statute, other law or contract) upon any of its property or assets, now owned or
hereafter acquired, except for Permitted Liens.

     9.03.     Dividends and Distributions.  Company shall be permitted to pay
Dividends and repurchase its shares of stock, provided, however, that the
aggregate amount of the Dividends so paid by Company and the amount expended by
Company to repurchase its shares of stock during any four consecutive calendar
quarterly periods shall not exceed twenty-five (25%) of Company's net cash flow
from operations during such four quarterly periods and Company shall be
permitted to repurchase the shares of its stock that is permitted by the lenders
under the Prior Loan Agreement pursuant to that certain consent letter dated
April 14, 1997; provided, further, however, that without the prior consent of
Majority Banks Company shall pay no Dividends nor shall Company repurchase any
of its shares of stock if (i) an Event of Default exists hereunder, (ii) payment
of such permitted Dividends or stock repurchases would cause an Event of Default
hereunder, or (iii) a Borrowing Base Deficiency exists hereunder.  For the
purposes of this Section 9.03, the term "net cash flow from operations" shall
mean Company's net income for the four quarterly periods under review as
established by the financial reports delivered by Company to Banks according to
Sections 8.01(a) and 8.01(b) hereof for such quarterly periods, plus
depreciation, depletion and other non-cash charges reflected in such financial
information.

     9.04.     Limitation on Investments.  Company will not, and will not permit
any Subsidiary to, make or have outstanding any Investments in any Person,
except for (i) Investments in Capital Stock of publicly traded companies engaged
primarily in the oil and gas industry, provided that the aggregate cost of all
Investments which are outstanding pursuant to this subclause (i) at any time
shall not exceed $30,000,000; (ii) Investments in Non-CT Royalty Trust Units,
provided that the aggregate cost of all Investments which are outstanding
pursuant to this subclause (ii) at any time shall not exceed $15,000,000; (iii)
Investments in CRT Units; (iv) Company's stock ownership in the Subsidiaries
and, if formed, Company's units in the Proposed Royalty Trust, (v) Temporary
Cash Investments, and (vi) such other "cash equivalent" investments as Majority
Banks may from time to time approve; provided, further, that Company will not,
and will not permit any Subsidiary to, make any Investments if (i) an Event of
Default exists hereunder or, with the lapse of time and the giving of notice or
both, an Event of Default would exist hereunder, (ii) the making of such
Investment would cause an Event of Default hereunder, or (iii) a Borrowing Base
Deficiency exists hereunder.

     9.05.     Alteration of Material Agreements.  Company will not, and will
not permit any of the Subsidiaries to, consent to or permit any alterations,
amendments, modifications, releases, waivers or terminations of any material
agreement to which it is a party which would result in a Material Adverse Effect
on Company or any Subsidiary, except that Company may consent to or 

                                      -62-
<PAGE>
 
permit amendments or modifications to the April 1997 Indenture and the October
1997 Indenture provided that such amendments or modifications do not (i)
increase the principal amount of the Subordinated Indebtedness issued under the
April 1997 Indenture above $125,000,000 or increase the rate of interest paid
thereon above nine and one-fourth percent (9 1/4%) per annum, (ii) increase the
principal amount of the Subordinated Indebtedness issued under the October 1997
Indenture above $175,000,000, or increase the rate of interest payable thereon
above eight and three-fourths percent (8 3/4%), (iii) provide for the final
maturity date of the Subordinated Indebtedness issued under the April 1997
Indenture to occur prior to April 1, 2007, (iv) provide for the final maturity
date of the Subordinate Indebtedness issued under the October 1997 Indenture to
occur prior to November 1, 2009, (v) affect the definition of the term "Credit
Agreement," "Credit Agreement Obligations," "Designated Senior Indebtedness,"
"Designated Guarantor Senior Indebtedness," "Guarantor Senior Indebtedness,"
"Indebtedness", "Senior Indebtedness" or "Subsidiary Guarantee" (as set forth in
the April 1997 Indenture or the October 1997 Indenture), (vi) affect any of the
subordination, Payment Blockage Notice or Payment Blockage Period provisions set
forth in the April 1997 Indenture or the October 1997 Indenture, or (vii) effect
any other amendments or modifications that are adverse to Banks.

     9.06.     Certain Transactions.  Company will not, and will not permit any
of the Subsidiaries to, enter into any transaction with, or pay any management
fees to, any Affiliate; provided, however, that Company and the Subsidiaries may
enter into transactions with Affiliates upon terms not less favorable to Company
or the Subsidiaries than would be obtainable at the time in comparable
transactions of Company or the Subsidiaries in arms-length dealings with Persons
other than Affiliates and, if formed, Company, subject to Section 9.21 hereof,
may transfer Mineral Properties to the Proposed Royalty Trust.

     9.07.     Limitation on Sale of Properties.  Company will not, and will not
permit any of the Subsidiaries to, (a) sell, assign, convey, exchange, lease or
otherwise dispose of any of its properties, rights, or assets, whether now owned
or hereafter acquired, except for sales of severed hydrocarbons or used,
obsolete or worn-out equipment which are made in the ordinary course of its
business and for a fair consideration; provided, however, that Company or any
Subsidiary may, for fair consideration, sell, assign, convey, exchange, lease or
otherwise dispose of (i) properties, rights, assets or business which are not
included for purpose of determining the Borrowing Base, and (ii) provided no
Event of Default exists hereunder, Mineral Properties which are included for the
purpose of determining the Borrowing Base if the net aggregate proceeds (cash or
otherwise) received by Company and its Subsidiaries from all such sale or sales
of such Mineral Properties do not exceed $35,000,000 during any calendar year or
(b) sell, assign or discount, except for fair consideration, any accounts
receivable.  As to such permitted sales of Mineral Properties, (i) the initial
$5,000,000 in net sales proceeds per any calendar year shall be retained by
Company without any obligation for payment to Banks of any portion of such
proceeds as a mandatory principal payment on the Loan, and there shall be no
reduction to the Borrowing Base under Section 5.05 hereof on account of such
sales, and (ii) for all permitted sales in excess of $5,000,000 per any calendar
year, the Borrowing Base shall be reduced by excluding the Mineral Properties
that are subject to such sales according to Section 5.05 and Company shall pay
to Banks as a mandatory principal payment on the Loan such portion of the net
proceeds derived from such sales as is necessary to cause the then Total
Outstandings to not exceed the Borrowing Base then in effect after
redetermination under Section 5.05 on account of

                                      -63-
<PAGE>
 
such sales. The provisions of this Section 9.07 shall not apply to Company's
transfer or assignment of Mineral Properties to the Proposed Royalty Trust upon
formation of the Proposed Royalty Trust or Company's transfer or sale of any of
its units in the Proposed Royalty Trust; provided, however, that Section 5.05(b)
shall apply upon Company's transfer or sale of any of its units in the Proposed
Royalty Trust.

     9.08.     Name, Fiscal Year and Accounting Method.  Company will not, and
will not permit any of the Subsidiaries to, change its name, fiscal year or
method of accounting.

     9.09.     Current Ratio.  Company will not permit the ratio of its
Consolidated Current Assets to its Consolidated Current Liabilities, as of any
date, to be less than 1.00 to 1.00.

     9.10.     Liquidation, Mergers, Consolidations and Dispositions of
Substantial Assets.  Company will not, and will not permit any of the
Subsidiaries to, dissolve or liquidate, or become a party to any merger or
consolidation if Company is not the surviving corporate entity, or sell,
transfer, lease  or otherwise dispose of all or any substantial part of its
property or assets or business, provided, however, that the foregoing shall not
operate to prevent the merger or consolidation of any Subsidiary into Company or
a sale, transfer or lease of assets by any Subsidiary to Company or the
dissolution of a Subsidiary if the assets of such Subsidiary are transferred to
Company or another wholly-owned Subsidiary.

     9.11.     Lines of Business.  Company will not, directly or indirectly,
engage in any business other than the acquisition, exploration, development,
operation, management or resale of oil and gas properties and the processing,
marketing and transportation of production therefrom and the ownership, leasing
and management of real estate as conducted by WTW Properties, Inc.

     9.12.     No Amendments.  Company will not, and will not permit any
Subsidiary to, amend its agreement of limited partnership, or its articles of
incorporation, as the case may be, if such amendment would result in a Material
Adverse Effect on Company or any Subsidiary.

     9.13.     Purchase of Substantial Assets.  Company will not, and will not
permit any Subsidiary to, purchase, lease or otherwise acquire all or
substantially all of the assets of any other Person, if, as a result of such
transaction, Company or any Subsidiary would incur, assume or otherwise become
liable for any Indebtedness which is not otherwise permitted under Section 9.01
hereof, or any of such Persons would knowingly become responsible or liable for
any presently existing breach or violation, in any material respect, of any
Environmental Laws applicable to the assets so purchased, leased or acquired,
and provided further, Company will not, and will not permit any Subsidiary to,
purchase, lease or acquire any of such assets if (i) an Event of Default exists
hereunder or, with the lapse of time or the giving of notice or both, an Event
of Default would exist hereunder, (ii) such purchase, lease or acquisition would
cause an Event of Default hereunder, or (iii) a Borrowing Base Deficiency exists
hereunder.

     9.14.     Guaranties.  Company will not, and will not permit any Subsidiary
to, become or be liable in respect of any Guaranty, except for (i) the Guaranty
of Company of certain existing outstanding letters of credit of CT Operating
issued by NationsBank of Texas, N.A. or any 

                                      -64-
<PAGE>
 
extensions, renewals or replacements thereof, (ii) the Guaranty of the
Subsidiaries of the Obligation of Company under this Loan Agreement; (iii) the
Guaranty by Company of the trade payables of the Subsidiaries which are incurred
in the ordinary course of such Subsidiaries' business, provided however, that
such Guaranty shall not exceed $15,000,000 in the aggregate at any one time
outstanding, (iv) the Guaranty by Company of the obligations of Timberland
respecting its compressor station and interconnect facility, (v) the Guaranty by
Company of the Lease Agreements, (vi) the Guaranty by Company of other equipment
leases of its Subsidiaries not otherwise included in subclauses (ii), (iii) or
(iv) above, up to an aggregate face amount for all of such equipment leases of
$5,000,000 during any calendar year, and (vii) the Guaranty by the Subsidiaries
of the Subordinated Indebtedness that is defined as the "Subsidiary Guarantee"
in the April 1997 Indenture and the October 1997 Indenture.

     9.15.     Leases; Sale and Leaseback.  Company will not, and will not
permit any Subsidiary to, enter into any arrangement with any Person (including,
without limitation, any insurance company, bank or trustee) pursuant to which it
will lease, as lessee, any property which it owned as of the date hereof and
which it sold, transferred or otherwise disposed of to such other Person.

     9.16.     Restriction on Loans.  Without the prior written consent of
Majority Banks, which consent shall not be unreasonably withheld, Company shall
not make any loans or advances to any Person, including any Subsidiary or
Affiliate of Company, which are not in the ordinary course of Company's
business.

     9.17.     Speculative Trading.  Company shall not, and will not permit any
Subsidiary to, enter into or become bound by any transaction respecting
Speculative Trading or make any payment on account of any Speculative Trading.

     9.18.     Hedging Agreements.  Company shall not enter into or become bound
by any Hedge Agreement that covers (i) more than 100% of Company's projected
production from the Proved Developed Producing Reserves attributable to the
Mineral Properties during the 18-month period ensuing after the date such Hedge
Agreement is entered into or (ii) more than 75% of Company's projected
production from the Proved Developed Producing Reserves attributable to the
Mineral Properties for any period after the 18-month period following the date
such Hedge Agreement is entered into.

     9.19.     Prepayment or Redemption of Subordinated Indebtedness.  Without
the prior written consent of Majority Banks, Company shall not, and will not
permit any Subsidiary to, prepay (in whole or in part) any principal due on the
Subordinated Indebtedness or redeem (in whole or in part) the Subordinated
Indebtedness or exercise Company's rights of defeasance as set forth in Article
XI of the April 1997 Indenture or the October 1997 Indenture.  If Company
requests the consent of Majority Banks to do any of the foregoing, then Majority
Banks shall have the right to request a redetermination of the Borrowing Base
according to Section 5.04 hereof, which redetermination of the Borrowing Base
shall be in addition to any other redetermination of the Borrowing Base which
may be made pursuant to Section 5.04 of this Agreement.  In the case of such
redetermination of the Borrowing Base, Majority Banks in their discretion may
require a Reserve Report prepared by a firm of petroleum engineers selected by

                                      -65-
<PAGE>
 
Company and approved by Majority Banks or prepared by a petroleum engineer
employed by Company.  Notwithstanding the foregoing, provided that no Event of
Default exists or will occur on the account of such redemption, and no Borrowing
Base Deficiency exists, without the prior consent of Majority Banks, Company may
use proceeds derived from the public offering of any of its common stock, other
equity securities of Company or trust equity securities of Company to redeem up
to 33-1/3% of the Subordinated Indebtedness issued under the April 1997
Indenture as prescribed in the April 1997 Indenture and to redeem up to 33 1/3%
of the Subordinated Indebtedness issued under the October 1997 Indenture as
prescribed in the October 1997 Indenture.

     9.20.     Payments Respecting Permitted Margin Debt.  If Company is fully
indebted under all of its Permitted Margin Debt, and if, pursuant to any
required margin calls or collateral maintenance provisions in any agreements
creating or evidencing any Permitted Margin Debt that is secured by Capital
Stock of publicly traded companies engaged primarily in the oil and gas
industry, Company is required to make a mandatory principal payment on such
Permitted Margin Debt,  Company shall not use proceeds from the Loan to make
such principal payment on such Permitted Margin Debt without the prior written
consent of Majority Banks.

     9.21.     Formation of Proposed Royalty Trust.  If Company forms the
Proposed Royalty Trust, (i) upon formation of the Proposed Royalty Trust,
Company shall not own less than all of the issued and outstanding units of the
Proposed Royalty Trust subject to options to acquire such units that are granted
to management of Company, (ii) Company shall not grant options to its management
or any other Person to acquire in excess of six percent (6%) of the total issued
and outstanding units of the Proposed Royalty Trust, (iii) Company shall not
form the Proposed Royalty Trust after December 31, 1998, (iv) the Proposed
Royalty Trust shall not be formed unless (a) it is formed pursuant to a trust
indenture substantially similar to the trust indenture for the Cross Timbers
Royalty Trust and (b) the trustee for the Proposed Royalty Trust is a financial
institution of national recognition, and (v) the Proposed Royalty Trust shall
not be formed unless Agents and Majority Banks approve the form of trust
indenture therefor.  Further, if Company forms the Proposed Royalty Trust, then
until Company makes a public offering of the units of the Proposed Royalty
Trust, Sections 9.01, 9.02, 9.04, 9.05, 9.06, 9.14, 9.15, 9.17 and 9.18 shall be
deemed amended to include conforming negative covenants concerning the Proposed
Royalty Trust according to the context of the negative covenants in such
sections, and Company shall cause the Proposed Royalty Trust to not violate or
breach such negative covenants as amended to include the Proposed Royalty Trust.

     9.22.     Strict Compliance.  If any action or failure to act by Company
violates any covenant or obligation of Company contained herein, then such
violation shall not be excused by the fact that such action or failure to act
would otherwise be required or permitted by any covenant (or exception to any
covenant) other than the covenant violated.

                                      -66-
<PAGE>
 
                                    ARTICLE 10
                                    ----------

                                 EVENTS OF DEFAULT
                                 -----------------

     10.01.    Events of Default.  An "Event of Default" shall exist if any one
or more of the following events (herein collectively called "Events of Default")
shall occur and be continuing:

               (a) Company shall fail to pay when due any principal of any 
Note and such failure to pay principal shall continue for a period of one (1)
day or Company shall fail to pay when due any interest on any Note or any fee,
expense or other payment required hereunder and such failure to pay such
interest, fee, expense or other payment (excluding principal on any Note) shall
continue for a period of five (5) days;

               (b) any representation or warranty made under this Loan Agreement
(except Section 6.21 or 6.22), or any of the other Loan Papers, or in any
certificate or statement furnished or made to Banks pursuant hereto or in
connection herewith or with the Loans hereunder, shall prove to be untrue or
inaccurate in any material respect as of the date on which such representation
or warranty is made;

               (c) default shall occur in the performance of any of the 
covenants or agreements of Company or any Subsidiary contained herein, or in any
of the other Loan Papers and such default shall continue unremedied for a period
of thirty (30) days or, if such default relates to the covenant set forth in
Section 9.09 hereof, for a period of ten (10) days following Company's actual
knowledge of the existence of such default or Company's receipt of a financial
statement which evidences that such default exists, whichever is the first to
occur;

               (d) default shall occur in the payment of any Indebtedness of 
Company or any Subsidiary in excess of $2,000,000 in the aggregate or default
shall occur in respect of any material obligation under any note, loan agreement
or credit agreement relating to any such Indebtedness and such default shall
continue for more than the period of grace, if any, specified therein; or any
such Indebtedness shall become due before its stated maturity by acceleration of
the maturity thereof or shall become due by its terms and shall not be promptly
paid or extended; or any event or occurrence shall exist which may cause such
Indebtedness to become due prior to its stated maturity date even if such
maturity date is not accelerated by the holder of such Indebtedness;

               (e) any of the Loan Papers shall cease to be legal, valid, 
binding agreements enforceable against Company in accordance with the respective
terms thereof or shall in any way be terminated or become or be declared
ineffective or inoperative or shall in any way whatsoever cease to give or
provide the respective liens, security interest, rights, titles, interest,
remedies, powers or privileges, if any, intended to be created thereby;

               (f) Company or any Subsidiary shall (i) apply for or consent to
the appointment of a receiver, trustee, custodian, intervenor or liquidator of
itself or of all or a substantial part of any of such Person's assets, (ii) file
a voluntary petition in bankruptcy or admit in writing that any of such Persons
is unable to pay its debts as they become due, (iii) make a 

                                      -67-
<PAGE>
 
general assignment for the benefit of creditors, (iv) file a petition or answer
seeking reorganization of an arrangement with creditors or to take advantage of
any bankruptcy or insolvency laws, (v) file an answer admitting the material
allegations of, or consent to, or default in answering, a petition filed against
any of such Persons in any bankruptcy, reorganization or insolvency proceeding,
or (vi) take corporate or partnership action for the purpose of effecting any of
the foregoing;

               (g) an involuntary petition or complaint shall be filed against
Company or any Subsidiary seeking bankruptcy or reorganization of Company or
such Subsidiary or the appointment of a receiver, custodian, trustee, intervenor
or liquidator of Company or such Subsidiary, or all or substantially all of any
of such Person's assets, and such petition or complaint shall not have been
dismissed within 60 days of the filing thereof; or an order, order for relief,
judgment or decree shall be entered by any court of competent jurisdiction or
other competent authority approving a petition or complaint seeking
reorganization of Company or any Subsidiary or appointing a receiver, custodian,
trustee, intervenor or liquidator of Company or any Subsidiary, or of all or
substantially all of any of such Person's assets, and such order, judgment or
decree shall continue unstayed and in effect for a period of thirty (30) days;

               (h) any final judgment(s) for the payment of money in excess of
the sum of $2,000,000 in the aggregate shall be rendered against Company or any
Subsidiary and such judgment or judgments shall not be satisfied or discharged
at least ten (10) days prior to the date on which any of its assets could be
lawfully sold to satisfy such judgment;

               (i) both the following events shall occur:  (i) either (x) 
proceedings shall have been instituted to terminate, or a notice of termination
shall have been filed with respect to, any Plans (other than a Multi-Employer
Pension Plan as that term is defined in Section 3(37) of ERISA) by Company, any
Subsidiary, any member of the Controlled Group, PBGC or any representative of
any thereof, or any such Plan shall be terminated, in each case under Section
4041 or 4042 of ERISA, or (y) a Reportable Event, the occurrence of which would
cause the imposition of a lien under Section 4062 of ERISA, shall have occurred
with respect to any Plan (other than a Multi-Employer Pension Plan as that term
is defined in Section 3(37) of ERISA) and be continuing for a period of sixty
(60) days; and (ii) the sum of the estimated liability to PBGC under Section
4062 of ERISA and the currently payable obligations of Company or any Subsidiary
to fund liabilities (in excess of amounts required to be paid to satisfy the
minimum funding standard of Section 412 of the Code) under the Plan or Plans
subject to such event shall exceed ten percent (10%) of Consolidated Tangible
Net Worth at such time;

               (j) any or all of the following events shall occur with respect
to any Multi-Employer Pension Plan (as that term is defined in Section 3(37) of
ERISA) to which Company or any Subsidiary contributes or contributed on behalf
of its employees: (i) Company or any Subsidiary incurs a withdrawal liability
under Section 4201 of ERISA; or (ii) any such plan is "in reorganization" as
that term is defined in Section 4241 of ERISA; or (iii) any such Plan is
terminated under Section 4041A of ERISA, and Majority Banks determine in good
faith that the aggregate liability likely to be incurred by Company or any
Subsidiary, as a result of all or any of the events specified in Subsections
(i), (ii) and (iii) above occurring, shall have a Material Adverse Effect;

                                      -68-
<PAGE>
 
               (k) a Borrowing Base Deficiency has occurred and any Event of 
Default specified in Section 5.06(c) hereof shall occur;

               (l) an event of default shall exist under the terms of the April
1997 Indenture or the October 1997 Indenture;

               (m) either the Trustee or any holder of any of the Subordinated
Indebtedness shall do any of the following:  (i) accelerate the maturity of any
of the Subordinated Indebtedness, (ii) pursue or exercise any remedies provided
for in the April 1997 Indenture or the October 1997 Indenture, (iii) sue for or
collect any amount due on any of the Subordinated Indebtedness or (iv) file a
petition or complaint against Company seeking bankruptcy or reorganization of
Company or the appointment of a receiver, custodian, trustee, intervenor or
liquidator of Company;

               (n) without the prior consent of all Banks, Company or any 
Subsidiary shall prepay (in whole or in part) any of the Subordinated
Indebtedness or redeem (in whole or in part) any of the Subordinated
Indebtedness or Company shall exercise its rights of defeasance as set forth in
Article XII of the April 1997 Indenture or the October 1997 Indenture, unless
such purchase, prepayment, redemption or exercise of rights of redemption is
otherwise permitted according to Section 9.19 hereof;

               (o) Company and/or the Gas Marketing Subsidiaries shall fail to
execute and deliver to Agents the Collateral Documents within 30 days following
Agents' written notice to Company and/or the Gas Marketing Subsidiaries
requesting Company to execute and deliver the Collateral Documents;

               (p) a Change of Control shall occur; or

               (q) any Event of Default specified in Section 6.21 or 6.22 hereof
shall occur.

     10.02.    Remedies Upon Event of Default.  If an event of Default shall
have occurred and be continuing, then Administrative Agent shall, at the request
of Majority Banks, and may, with the consent of Majority Banks, exercise any one
or more of the following rights and remedies, and any other remedies provided in
any of the Loan Papers, as Majority Banks in their sole discretion, may deem
necessary or appropriate:  (i) terminate Banks' Commitment to lend hereunder,
whereupon the same shall immediately terminate, (ii) declare the principal of,
and all interest then accrued on, the Notes and any other liabilities hereunder
to be forthwith due and payable, whereupon the same shall forthwith become due
and payable without presentment, demand, protest, notice of default, notice of
acceleration or of intention to accelerate or other notice of any kind all of
which Company hereby expressly waives, anything contained herein or in the Notes
to the contrary notwithstanding, (iii) reduce any claim to judgment, and/or (iv)
without notice of default or demand, pursue and enforce any of Banks' rights and
remedies under the Loan Papers, or otherwise provided under or pursuant to any
applicable law or agreement; provided, however, that if any Event of Default
specified in Sections 10.01(f) and (g) shall occur, the principal of, and all
interest on, the Notes and other liabilities hereunder shall thereupon 

                                      -69-
<PAGE>
 
become due and payable concurrently therewith, and Banks' obligations to lend
shall immediately terminate hereunder, without any further action by
Administrative Agent or any Bank and without presentment, demand, protest,
notice of default, notice of acceleration or of intention to accelerate or other
notice of any kind, all of which Company hereby expressly waives.

     10.03.    Performance by Banks.  Should Company fail to perform any
covenant, duty or agreement contained herein or in any of the Loan Papers,
Administrative Agent, either Agent or Banks may, at their option, perform or
attempt to perform such covenant, duty or agreement on behalf of Company.  In
such event, Company shall, at the request of Administrative Agent or Banks,
promptly pay any amount expended by Administrative Agent or Banks in such
performance or attempted performance to Administrative Agent at its principal
office in New York, New York, together with interest thereon at the highest
lawful rate from the date of such expenditure until paid.  Notwithstanding the
foregoing, it is expressly understood that neither Banks nor Administrative
Agent assume any liability or responsibility for the performance of any duties
of Company hereunder or under any of the Loan Papers or other control over the
management and affairs of Company.

     10.04.    Formation of Proposed Royalty Trust.  If Company forms the
Proposed Royalty Trust, then until Company makes a public offering of the units
of the Proposed Royalty Trust, Sections 10.01(d), 10.01(f), 10.01(g), 10.01(h),
10.01(i), and 10.01(j) shall be deemed amended to include conforming Events of
Default concerning the Proposed Royalty Trust according to the context of the
Events of Default in such sections.

                                    ARTICLE 11
                                    ----------

                                 AGENCY PROVISIONS
                                 -----------------

     11.01.    Appointment and Authorization.  Each Bank hereby irrevocably
appoints and authorizes Administrative Agent and Syndication Agent, as its
Agent, to take such action on its behalf and to exercise such powers under the
Loan Papers as are delegated to such Agent by the terms thereof, together with
such powers as are reasonably incidental thereto.  Notwithstanding any provision
to the contrary contained elsewhere in this Loan Agreement, Agents shall not
have any duties or responsibilities except those expressly set forth herein, or
any fiduciary relationship with any Bank, and no implied covenants, functions,
responsibilities, duties, obligations or liabilities shall be read into this
Loan Agreement or any other Loan Papers or otherwise exist against Agents.  With
respect to its Commitment, the Advances made by it and the Notes issued to it,
each Agent shall have the same rights and powers under this Loan Agreement as
any other Bank and may exercise the same as though it were not an Agent; and the
term "Bank" or "Banks" shall, unless otherwise expressly indicated, include each
Agent in its capacity as a Bank.  Each Agent and its affiliates may accept
deposits from, lend money to, act as trustee under indentures of, and generally
engage in any kind of business with, Company, and any Person which may do
business with Company, all as if such Agent were not an Agent hereunder and
without any duty to account therefor to Banks.  Notwithstanding anything set
forth herein to the contrary, Documentation Agent shall not have any rights,
powers, obligations, liabilities, responsibilities 

                                      -70-
<PAGE>
 
or duties under this Loan Agreement or the other Loan Papers other than those
applicable to all Banks as such.

     11.02.    Consultation with Counsel.  Banks agree that each Agent may
consult with legal counsel selected by it and shall not be liable for any action
taken or suffered in good faith by them in accordance with the advice of such
counsel.

     11.03.    Documents.  Neither Agent shall be under a duty to examine or
pass upon the validity, effectiveness, enforceability, genuineness or value of
any of the Loan Papers or any other instrument or document furnished pursuant
thereto or in connection therewith, and each Agent shall be entitled to assume
that the same are valid, effective, enforceable and genuine and what they
purport to be.

     11.04.    Resignation.  Subject to the appointment and acceptance of a
successor Agent as provided below, any Agent may resign at any time by giving
written notice thereof to Banks and Company.  Upon any such resignation,
Majority Banks (or the majority in number of Banks with respect to any removal
for cause) shall have the right to appoint a successor Agent, subject to
Company's consent, not to be unreasonably withheld, if the successor Agent is
not a Bank.  If no successor Agent shall have been so appointed by Majority
Banks (or the majority in number of Banks with respect to any removal for cause)
and shall have accepted such appointment within 30 days after the retiring
Agent's giving of notice of resignation, then the retiring Agent may, on behalf
of Banks, appoint a successor Agent, subject to Company's consent, not to be
unreasonably withheld, if such successor Agent is not a Bank.  Upon the
acceptance of any appointment as Agent hereunder by a successor Agent, such
successor Agent shall thereupon succeed to and become vested with all the
rights, powers, privileges and duties of the retiring Agent, and the retiring
Agent shall be discharged from its duties and obligations hereunder.  After any
retiring Agent's resignation hereunder as Agent, the provisions of this Article
11 shall continue in effect for its benefit in respect to any actions taken or
omitted to be taken by it while it was acting as Agent.

     11.05.    Responsibility.  It is expressly understood and agreed that the
obligations of each Agent under the Loan Papers are only those expressly set
forth in the Loan Papers and that each Agent shall be entitled to assume that no
Event of Default or event which, with the giving of notice or lapse of time, or
both, would constitute an Event of Default has occurred and is continuing,
unless such Agent has actual knowledge of such fact or has received notice from
a Bank that such Bank considers that an Event of Default or such event has
occurred and is continuing and specifying the nature thereof.  Neither Agent nor
any of its directors, officers or employees shall be liable for any action taken
or omitted to be taken by it under or in connection with the Loan Papers, except
for its own gross negligence or willful misconduct.  Neither Agent shall incur
any liability under or in respect of any of the Loan Papers by acting upon any
notice, consent, certificate, warranty or other paper or instrument reasonably
believed by it to be genuine or authentic or to be signed by the proper party or
parties, or with respect to anything which it may do or refrain from doing in
the reasonable exercise of its judgment, or which may seem to it to be
reasonably necessary or desirable under the circumstances.

                                      -71-
<PAGE>
 
     The relationship between each Agent and each Bank is only that of agent and
principal and has no fiduciary aspects, and each Agent's duties hereunder are
acknowledged to be only ministerial and not involving the exercise of discretion
on its part.  Nothing in this Loan Agreement or elsewhere contained shall be
construed to impose on any Agent any duties or responsibilities other than those
for which express provision is herein made.  In performing its duties and
functions hereunder, neither any Agent assumes and shall not be deemed to have
assumed, and hereby expressly disclaims, any obligation or responsibility toward
or any relationship of agency or trust with or for, Company.  As to any matters
not expressly provided for by this Loan Agreement, neither Agent shall be
required to exercise any discretion or take any action, but shall be required to
act or to refrain from acting (and shall be fully protected in so acting or
refraining from acting) upon the instructions of Majority Banks and such
instructions shall be binding upon all Banks and all holders of Notes; provided,
however, that neither Agent shall be required to take any action which is
contrary to this Loan Agreement or applicable law.

     11.06.    Notices of Event of Default.  In the event that any Agent shall
have acquired actual knowledge of any Event of Default or of an event which,
with the giving of notice or the lapse of time, or both, would constitute an
Event of Default, such Agent shall promptly give notice thereof to the other
Banks.

     11.07.    Independent Investigation.  Each Bank severally represents and
warrants to each Agent that it has made its own independent investigation and
assessment of the financial condition and affairs of Company in connection with
the making and continuation of its participation in the Loans hereunder and has
not relied exclusively on any information provided to such Bank by such Agent in
connection herewith, and each Bank represents, warrants and undertakes to each
Agent that it shall continue to make its own independent appraisal of the
creditworthiness of Company while the Loans are outstanding or its commitment
hereunder is in force.

     11.08.    INDEMNIFICATION.  BANKS AGREE TO INDEMNIFY EACH AGENT (TO THE
EXTENT NOT REIMBURSED BY COMPANY), RATABLY ACCORDING TO THE PROPORTION THAT THE
RESPECTIVE PRINCIPAL AMOUNTS OF THE NOTE HELD BY EACH OF THEM BEARS TO THE SUM
OF THE AGGREGATE PRINCIPAL AMOUNT OF THE NOTES, FROM AND AGAINST ANY AND ALL
LIABILITIES, OBLIGATIONS, LOSSES, DAMAGES, PENALTIES, ACTIONS, JUDGMENTS, SUITS,
COSTS, EXPENSES, OR DISBURSEMENTS OF ANY KIND OR NATURE WHATSOEVER (OTHER THAN
THOSE ARISING SOLELY BY REASON OF AGENT BEING A BANK) WHICH MAY BE IMPOSED ON,
INCURRED BY OR ASSERTED AGAINST SUCH AGENT IN ANY WAY RELATING TO OR ARISING OUT
OF THE LOAN PAPERS OR ANY ACTION TAKEN OR OMITTED BY SUCH AGENT UNDER THE LOAN
PAPERS, PROVIDED THAT NO BANK SHALL BE LIABLE FOR ANY PORTION OF SUCH
LIABILITIES, OBLIGATIONS, LOSSES, DAMAGES, PENALTIES, ACTIONS, JUDGMENTS, SUITS,
COSTS, EXPENSES OR DISBURSEMENTS RESULTING FROM ANY AGENT'S GROSS NEGLIGENCE OR
WILLFUL MISCONDUCT.

                                      -72-
<PAGE>
 
     11.09.    Forwarding of Information to Banks.  Unless otherwise specified
in this Loan Agreement, each Agent agrees to deliver or cause to be delivered to
each Bank, within two (2) Business Days, copies of all notices, reports,
certificates and other information received from Company or any of its
Subsidiaries in connection with this Loan Agreement or any other Loan Papers if
such notices, reports, certificates or other such information was not otherwise
delivered to such Bank by Company or any other Agent.

     11.10.    Benefit of Article 11.  The agreements contained in this Article
11 are solely for the benefit of Agents and Banks, and are not for the benefit
of, or to be relied upon by, Company, or any third party.

                                    ARTICLE 12
                                    ----------

         SPECIAL PROVISIONS FOR EURODOLLAR AND CD LOANS; YIELD PROTECTION
         ----------------------------------------------------------------

     12.01.    Inadequacy of Pricing.  If

     (A) with respect to an Interest Period for any Eurodollar Borrowing:

               (i)  Administrative Agent determines that, by reason of 
circumstances affecting the interbank eurodollar market generally, deposits in
Dollars (in the applicable amounts) are not being offered to the Reference Banks
in the interbank eurodollar market for such Interest Period, or

               (ii) Majority Banks advise Administrative Agent that the 
InterBank Offered Rate as determined by Administrative Agent will not adequately
and fairly reflect the cost to such Banks of maintaining or funding the
Eurodollar Borrowing for such Interest Period; or

     (B) with respect to an Interest Period for any CD Borrowing:

               (i)  no timely quotations of the applicable rate are offered to
Reference Banks by certificate of deposit dealers for their certificates of
deposit as contemplated herein, or

               (ii) Majority Banks advise Administrative Agent that the CD 
Quoted Rate as determined by Administrative Agent will not adequately and fairly
reflect the cost to such Banks of maintaining or funding the CD Borrowing,

(such Eurodollar Advances or CD Advances that become subject to the foregoing
provisions of this Section 12.01 are herein called the "Affected Borrowings"),
then Administrative Agent shall forthwith give notice thereof to Company and
Banks, whereupon until Administrative Agent notifies Company that the
circumstances giving rise to such suspension no longer exist, (a) the obligation
of Banks to make the Affected Borrowings shall be suspended and (b) Company
shall either (i) repay in full the then-outstanding principal amount of the
Affected Borrowings, together with accrued interest thereon on the last day of
the then-current Interest Period applicable to such Affected Borrowings, or (ii)
convert such Affected Borrowings to Floating Base Borrowings or any other
Borrowing that is not an Affected Borrowing in accordance with 

                                      -73-
<PAGE>
 
Section 2.02(c) of this Loan Agreement on the last day of the then-current
Interest Period applicable to each such Affected Borrowing.

     12.02.    Illegality.  If, after the date of this Loan Agreement, the
adoption of any applicable law, rule or regulation, or any change therein, or
any change in the interpretation or administration thereof by any Governmental
Authority, central bank or comparable agency charged with the interpretation or
administration thereof, or compliance by any Bank with any request or directive
(whether or not having the force of law) of any such authority, central bank or
comparable agency shall make it unlawful or impossible for any Bank to make,
maintain or fund its Eurodollar Advances or CD Advances, and such Bank shall so
notify Administrative Agent, Administrative Agent shall forthwith give notice
thereof to Banks and Company.  Before giving any notice pursuant to this Section
12.02 that affects Eurodollar Advances, such Bank shall designate a different
Eurodollar lending office if such designation will avoid the need for giving
such notice and will not be otherwise disadvantageous to any non-trivial extent
to such Bank (as determined in good faith by such Bank) (the Eurodollars
Advances or CD Advances that become subject to the provisions of this Section
12.02 are herein called "Affected Borrowings").  Upon receipt of such notice,
Company shall either (i) repay in full the then outstanding principal amount of
the Affected Borrowings of such Bank, together with accrued interest thereon, or
(ii) convert such Affected Borrowings to or any other Borrowing that is not an
Affected Borrowing, on either (a) the last day of the then current Interest
Period applicable to such Affected Borrowings if such Bank may lawfully continue
to maintain and fund such Affected Borrowings to such day or (b) immediately if
such Bank may not lawfully continue to fund and maintain such Affected
Borrowings to such day.

     12.03.    Increased Costs for Loans.  If any Governmental Authority,
central bank or other comparable authority, shall at any time impose, modify or
deem applicable any reserve (including, without limitation, any imposed by the
Board of Governors of the Federal Reserve System but excluding any reserve
requirement included in the Eurodollar or CD Reserve Requirement of such Bank),
special deposit or similar requirement against assets of, deposits with or for
the account of, or credit extended by, any Bank, or shall impose on any Bank (or
its Eurodollar lending office) or the interbank eurodollar market any other
condition affecting its Eurodollar Advances, CD Advances, the Note or its
obligation to make Eurodollar Advances; and the result of any of the foregoing
is to increase the cost to such Bank of making or maintaining its Eurodollar
Advances, CD Advances, or to reduce the amount of any sum received or receivable
by such Bank under this Agreement, or under the Note, by an amount deemed by
such Bank to be material (the Eurodollars Advances or CD Advances that become
subject to the provisions of this Section 12.03 are herein called "Affected
Borrowings"), then, within five (5) days after demand by such Bank (with a copy
to Administrative Agent) Company shall pay to Administrative Agent, for the
account of such Bank, such additional amount or amounts as will compensate such
Bank for such increased cost or reduction.  Each Bank will promptly notify
Company and Administrative Agent of any event of which it has knowledge,
occurring after the date hereof, which will entitle such Bank to compensation
pursuant to this Section.  A certificate of any Bank claiming compensation under
this Section and setting forth the additional amount or amounts to be paid to it
hereunder shall be conclusive in the absence of manifest error.  If any Bank
demands compensation under this Section, then Company may at any time, upon at
least five (5) Business Days' prior notice to such Bank through Administrative

                                      -74-
<PAGE>
 
Agent, either (i) repay in full the then outstanding Affected Brrowings of such
Bank, together with accrued interest thereon to the date of prepayment or (ii)
convert such Affected Borrowings to or any other Borrowing that is not an
Affected Borrowing in accordance with the provisions of this Loan Agreement;
provided, however, that Company shall be liable for any Consequential Loss
arising pursuant to such actions.

     12.04.    Effect on Other Loans.  If notice has been given pursuant to
Section 5.02 or Section 5.03 requiring the Affected Borrowings of any Bank to be
repaid or converted, then unless and until such Bank notifies Company that the
circumstances giving rise to such repayment no longer apply, all Advances or any
other Borrowing that are not Affected Borrowings shall be Advances.  If such
Bank notifies Company that the circumstances giving rise to such repayment no
longer apply, Company may thereafter select Advances to be Borrowings that were
formerly Affected Borrowings  in accordance with Section 2.02(c) of this Loan
Agreement.

     12.05.    Payments Not At End of Interest Period.  If Company makes any
payment of principal with respect to any Eurodollar Borrowing or CD Borrowing on
any day other than the last day of an Interest Period applicable to such
Eurodollar Borrowing or CD Borrowing, then Company shall reimburse each Bank on
demand the Consequential Loss incurred by it as a result of the timing of such
payment.  A certificate of each Bank setting forth the basis for the
determination of the amount of Consequential Loss shall be delivered to Company
through Administrative Agent and shall, in the absence of manifest error, be
conclusive and binding.  Any conversion of (i) a Eurodollar Borrowing to a CD
Borrowing or Floating Base Borrowing or (ii) a conversion of a CD Borrowing to a
Eurodollars Borrowing or a Floating Base Borrowing on any day other than the
last day of the Interest Period for such Eurodollar Borrowing shall be deemed a
payment for purposes of this Section.

     12.06.    Capital Adequacy.  If, after the date hereof, any Bank shall
determine that either (i) the adoption of any applicable law, rule, regulation
or guideline regarding capital adequacy and applicable to commercial banks or
financial institutions generally or any change therein, or any change in the
interpretation or administration thereof by any Governmental Authority, central
bank or comparable agency charged with the interpretation or administration
thereof, or (ii) compliance by such Bank (or any lending office of such Bank)
with any request or directive applicable to commercial banks or financial
institutions generally regarding capital adequacy (whether or not having the
force of law) of any such authority, central bank or comparable agency has or
would have the effect of reducing the rate of return on such Bank's capital or
the capital of such Bank's holding company as a consequence of its obligations
hereunder to a level below that which such Bank could have achieved but for such
adoption, change or compliance (taking into consideration such Bank's policies
with respect to capital adequacy) by an amount reasonably deemed by such Bank to
be material, then from time to time, within fifteen (15) days after demand by
such Bank (with a copy to Administrative Agent), Company shall pay to such Bank
such additional amount or amounts as will adequately compensate such Bank for
such reduction.  Each Bank will promptly notify Company and Administrative Agent
of any event of which it has actual knowledge, occurring after the date thereof,
which will entitle such Bank to compensation pursuant to this Section 12.06.  A
certificate of such Bank claiming compensation 

                                      -75-
<PAGE>
 
under this Section 12.06 and setting forth the additional amount of amounts to
be paid to it hereunder shall be conclusive in the absence of manifest error.

                                    ARTICLE 13
                                    ----------

                                   MISCELLANEOUS
                                   -------------

     13.01.    Modification.  All modifications, consents, amendments or waivers
of any provision of any Loan Paper, or consent to any departure by Company
therefrom, shall be effective only if the same shall be in writing and concurred
in by Majority Banks and then shall be effective only in the specific instance
and for the purpose for which given; provided, however, that no change in the
provisions of this Loan Agreement which has the effect of (i) increasing the
Borrowing Base then in effect or increasing the Commitment then in effect or any
Bank's Percentage of the Commitment then in effect, (ii) reducing or increasing
the amount of principal or interest or rate of interest otherwise due on any
Note or any fee payable by Company hereunder, (iii) postponing, extending,
forbearing, or waiving the date on which any payment of principal, interest or
fee is due hereunder or extending the Maturity Date, (iv) modifying the amount
of any Scheduled Installment that may become due hereunder, (v) modifying the
definition of "Majority Banks," or Section 13.01 hereof, (vi) modifying the
number or percentage of Banks required to effect any modification, consent,
amendment or waiver of any provision of any Loan Paper, (vii) releasing any
guarantor of the Loan or any portion thereof or (viii) releasing any security
interest in any material or significant collateral that may secure the Loan (in
the event Section 8.19 should become applicable) shall be effective absent the
concurrence of all Banks.  Should any Bank withhold consent to any change in an
interest rate, increase in the amount of the Loan Commitment, extension of the
time for payment of any Note, or extension of the Maturity Date approved by
Majority Banks, the remaining consenting Banks shall have the option of
purchasing from the non-consenting Bank its Note, such purchase to be made
ratably by such remaining Banks in proportion to such Banks' respective
Percentages.

     13.02.    Accounting Terms and Reports.  All accounting terms not
specifically defined in this Loan Agreement shall be construed in accordance
with Generally Accepted Accounting Principles consistently applied on the basis
used by Company in prior years.  All financial reports furnished by Company to
Banks pursuant to this Loan Agreement shall be prepared in such form and such
detail as shall be satisfactory to Banks, shall be prepared on the same basis as
those prepared by Company in prior years and shall be the same financial reports
as those furnished to Company's officers and directors.  All financial
projections furnished by Company to Banks pursuant to this Loan Agreement shall
be prepared in such form and such detail as shall be satisfactory to Banks and
shall be prepared on the same basis as the financial reports furnished by
Company to Banks.

     13.03.    Waiver.  No failure to exercise, and no delay in exercising, on
the part of any Bank, any right hereunder shall operate as a waiver thereof, nor
shall any single or partial exercise thereof preclude any other further exercise
thereof or the exercise of any other right.  The rights of Banks hereunder and
under the Loan Papers shall be in addition to all other rights provided by law.
No modification or waiver of any provision of this Loan Agreement, the Notes or
any Loan papers, nor consent to departure therefrom, shall be effective unless
in writing and 

                                      -76-
<PAGE>
 
no such consent or waiver shall extend beyond the particular case and purpose
involved. No notice or demand given in any case shall constitute a waiver of the
right to take other action in the same, similar or other instances without such
notice or demand.

     13.04.    Payment of Expenses; Documentary Taxes; Indemnification.

               (a) Company agrees to pay (i) all out-of-pocket costs and 
expenses of Administrative Agent, either Agent and each Bank (including without
limitation the reasonable fees, expenses and disbursements of legal counsel
retained by Agents as legal counsel for Banks, but no other legal counsel for
any Bank retained separately by such Bank) in connection with the negotiation,
preparation, execution and delivery of this Loan Agreement and the other Loan
Papers, (ii) all out-of-pocket costs and expenses incurred by Administrative
Agent, either Agent and each Bank (including without limitation the reasonable
fees, expenses and disbursements of legal counsel retained by Agents as legal
counsel for Banks, but no other legal counsel for any Bank retained separately
by such Bank), in connection with the administration of this Loan Agreement, the
Notes, the other Loan Papers and any and all amendments, modifications and
supplements thereof or thereto and the preservation and enforcement of Banks'
rights under this Loan Agreement, the Notes and/or the other Loan Papers and
(iii) if an Event of Default occurs, all out-of-pocket costs and expenses
incurred by Administrative Agent, either Agent and each Bank (including without
limitation the reasonable fees, expenses and disbursements of legal counsel for
Administrative Agent, each Agent and each Bank) in connection with such Event of
Default and any collection, bankruptcy, insolvency and other enforcement
proceedings resulting therefrom. Company shall indemnify each Bank against any
transfer taxes, documentary taxes, assessments or charges made by any
governmental authority by reason of the execution and delivery of this Loan
Agreement or the Notes.

               (b) COMPANY AGREES TO INDEMNIFY EACH BANK AND HOLD EACH BANK 
HARMLESS FROM AND AGAINST ANY AND ALL LIABILITIES, LOSSES, DAMAGES, COSTS AND
EXPENSES OF ANY KIND, INCLUDING, WITHOUT LIMITATION, THE REASONABLE FEES AND
DISBURSEMENTS OF COUNSEL, WHICH MAY BE INCURRED BY ANY BANK (OR BY
ADMINISTRATIVE AGENT OR EITHER AGENT IN CONNECTION WITH THEIR ACTIONS AS
ADMINISTRATIVE AGENT OR EITHER AGENT HEREUNDER) IN CONNECTION WITH ANY
INVESTIGATIVE, ADMINISTRATIVE OR JUDICIAL PROCEEDING (WHETHER OR NOT SUCH BANK
SHALL BE DESIGNATED A PARTY THERETO) RELATING TO OR ARISING OUT OF THIS LOAN
AGREEMENT OR ANY ACTUAL OR PROPOSED USE OF PROCEEDS OF LOANS HEREUNDER; PROVIDED
THAT NO BANK SHALL HAVE THE RIGHT TO BE INDEMNIFIED HEREUNDER FOR ITS OWN GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT AS DETERMINED BY A COURT OF COMPETENT
JURISDICTION; PROVIDED, FURTHER, THAT COMPANY'S INDEMNIFICATION OF
ADMINISTRATIVE AGENT, EACH AGENT AND EACH BANK SHALL INCLUDE ANY AND ALL
LIABILITIES, LOSSES, DAMAGES, COSTS AND EXPENSES ARISING OUT OF OR CONNECTED
WITH ANY CLAIM ASSERTED BY OR CAUSE OF ACTION BROUGHT BY ANY SHAREHOLDER OF
COMPANY OR ANY OTHER PERSON WHICH ALLEGES OR ASSERTS THAT THE TRANSACTIONS

                                      -77-
<PAGE>
 
CONTEMPLATED BY OR CONSUMMATED UNDER OR PURSUANT TO THE INDENTURE OR
REGISTRATION STATEMENT OR THE ISSUANCE OF THE SUBORDINATED INDEBTEDNESS VIOLATE
OR CONTRAVENE ANY STATE OR FEDERAL SECURITIES LAW, RULE OR REGULATION.

     13.05.    Notices.  Except for telephonic notices permitted herein, any
notices or other communications required or permitted to be given by this Loan
Agreement or any other documents and instruments referred to herein must be (i)
given in writing and personally delivered or mailed by prepaid certified or
registered mail, or (ii) made by telecopy or facsimile delivered or transmitted,
to the party to whom such notice or communication is directed and if between any
Bank or Administrative Agent or any Agent and Company, confirmed by a hard copy
sent by overnight delivery service for delivery the following day, to the
address of such party as follows:

(a)  Company:                           (b)  Any Agent or any Bank:
 
     Cross Timbers Oil Company               At its address shown below its name
     810 Houston Street, Suite 2000          on the signature pages hereof.
     Fort Worth, Texas 76102
     (Attention: John O'Rear)
     Telecopy No. (817) 870-1671
 
     With copy to:

     Cross Timbers Oil Company
     810 Houston Street, Suite 2000
     Fort Worth, Texas 76102
     (Attention: General Counsel)
     Telecopy No. (817) 882-7278
 
Any notice to be personally delivered may be delivered to the principal offices
(determined as of the date of such delivery) of the party to whom such notice is
directed.  Any such notice or other communication shall be deemed to have been
given (whether actually received or not) on the day it is personally delivered
as aforesaid or, if mailed, on the third day after it is mailed as aforesaid;
or, if transmitted by telecopy, on the day that such notice is transmitted as
aforesaid; provided, however, that any telephonic or other notice received by
Administrative Agent or any Agent or any Bank after 12:00 noon New York time on
any day from Company pursuant to Section 2.02 (with respect to a Request for
Borrowing) shall be deemed for the purposes of such Section to have been given
by Company on the next succeeding Business Day.  Any party may change its
address for purposes of this Loan Agreement by giving notice of such change to
the other parties pursuant to this Section 13.05.

     13.06.    GOVERNING LAW.  THIS LOAN AGREEMENT HAS BEEN PREPARED, IS BEING
EXECUTED AND DELIVERED, AND IS INTENDED TO BE PERFORMED IN THE STATE OF TEXAS,
AND THE SUBSTANTIVE LAWS OF SUCH STATE AND THE APPLICABLE FEDERAL LAWS OF THE
UNITED STATES 

                                      -78-
<PAGE>
 
OF AMERICA SHALL GOVERN THE VALIDITY, CONSTRUCTION, ENFORCEMENT AND
INTERPRETATION OF THIS LOAN AGREEMENT AND ALL OF THE OTHER LOAN PAPERS, UNLESS
OTHERWISE SPECIFIED THEREIN OR UNLESS THE LAWS GOVERNING NATIONAL BANKS SHALL
HAVE APPLICATION. NOTHING IN THIS SECTION 13.06 OR ANY OTHER PROVISION OF THIS
LOAN AGREEMENT OR ANY NOTE IS INTENDED TO SUBJECT TO A LIMITATION IMPOSED BY
TEXAS LAW THE MAXIMUM NON-USURIOUS RATE OF INTEREST OTHERWISE PERMITTED TO BE
CHARGED BY ANY BANK UNDER THE FEDERAL LAWS OF THE UNITED STATES OF AMERICA AND
THE LAWS OF THE STATE IN WHICH SUCH BANK IS LOCATED.

     13.07.    Choice of Forum; Consent to Service of Process and Jurisdiction;
Waiver of Rights to Jury Trial.  Any suit, action or proceeding against Company
with respect to this Loan Agreement, the Notes or any judgment entered by any
court in respect thereof, may be brought in the courts of the State of Texas,
County of Tarrant, or in the United States courts located in the State of Texas
as Majority Banks in their sole discretion may elect and Company hereby submits
to the non-exclusive jurisdiction of such courts for the purpose of any such
suit, action or proceeding.  Company hereby agrees that service of all writs,
process and summonses in any such suit, action or proceeding brought in the
State of Texas may be brought upon any president, vice president or chief
financial officer of Company as Process Agent, and Company hereby irrevocably
appoints the Process Agent, as its true and lawful attorney-in-fact in the name,
place and stead of Company to accept such service of any and all such writs,
process and summonses, and agrees that the failure of Process Agent to give any
notice of such service of process to it shall not impair or affect the validity
of such service or of any judgment based thereon.  Company hereby further
irrevocably consents to the service of process in any suit, action or proceeding
in said court by the mailing thereof by Administrative Agent by registered or
certified mail, postage prepaid, to its address set forth in Section 13.05
hereof.  Company hereby irrevocably waives any objections which it may now or
hereafter have to the laying of venue of any suit, action or proceeding arising
out of or relating to this Loan Agreement or any Note brought in the courts
located in the State of Texas, County of Tarrant, and hereby further irrevocably
waives any claim that any such suit, action or proceeding brought in any such
court has been brought in any inconvenient forum.  COMPANY AND EACH BANK HEREBY
KNOWINGLY, VOLUNTARILY, INTENTIONALLY, IRREVOCABLY AND UNCONDITIONALLY WAIVE ALL
RIGHTS TO TRIAL BY JURY IN ANY ACTION, SUIT, PROCEEDING, COUNTERCLAIM OR OTHER
LITIGATION THAT RELATES TO OR ARISES OUT OF ANY OF THIS LOAN AGREEMENT OR ANY
OTHER LOAN PAPERS OR THE ACTS OR OMISSIONS OF THE BANKS IN THE ENFORCEMENT OF
ANY OF THE TERMS OR PROVISIONS OF THIS LOAN AGREEMENT OR ANY OTHER LOAN PAPERS
OR OTHERWISE WITH RESPECT THERETO.  THE PROVISIONS OF THIS SECTION ARE A
MATERIAL INDUCEMENT FOR BANKS ENTERING INTO THIS AGREEMENT.

     13.08.    Invalid Provisions.  If any provision of any Loan Paper is held
to be illegal, invalid or unenforceable under present or future laws during the
term of this Loan Agreement, such provision shall be fully severable; such Loan
Paper shall be construed and enforced as if such illegal, invalid or
unenforceable provision had never comprised a part of such Loan Paper; 

                                      -79-
<PAGE>
 
and the remaining provisions of such Loan Paper shall remain in full force and
effect and shall not be affected by the illegal, invalid or unenforceable
provision or by its severance from such Loan Paper. Furthermore, in lieu of each
such illegal, invalid or unenforceable provision shall be added as part of such
Loan Paper a provision mutually agreeable to Company, Administrative Agent and
Majority Banks as similar in terms to such illegal, invalid or unenforceable
provision as may be possible and be legal, valid and enforceable. In the event
Company, Administrative Agent, and Majority Banks are unable to agree upon a
provision to be added to the Loan Paper within a period of ten (10) Business
Days after a provision of the Loan Paper is held to be illegal, invalid or
unenforceable, then a provision acceptable to Administrative Agent and Majority
Banks as similar in terms to the illegal, invalid or unenforceable provision as
is possible and be legal, valid and enforceable shall be added automatically to
such Loan Paper. In either case, the effective date of the added provision shall
be the date upon which the prior provision was held to be illegal, invalid or
unenforceable.

     13.09.    Maximum Interest Rate.  Regardless of any provision contained in
any of the Loan Papers, Banks shall never be entitled to receive, collect or
apply as interest on the Notes any amount in excess of the Maximum Rate, and, in
the event that any Bank ever receives, collects or applies as interest any such
excess, the amount which would be excessive interest shall be deemed to be a
partial prepayment of principal and treated hereunder as such; and, if the
principal amount of the Obligations is paid in full, any remaining excess shall
forthwith be paid to Company.  In determining whether or not the interest paid
or payable under any specific contingency exceeds the Maximum Rate, Company and
Banks shall, to the maximum extent permitted under applicable law, (i)
characterize any nonprincipal payment as an expense, fee or premium rather than
as interest; (ii) exclude voluntary prepayments and the effects thereof; and
(iii) amortize, prorate, allocate and spread, in equal parts, the total amount
of interest throughout the entire contemplated term of the Notes so that the
interest rate is uniform throughout the entire term; provided that, if the Notes
are paid and performed in full prior to the end of the full contemplated term
thereof, and if the interest received for the actual period of existence thereof
exceeds the Maximum Rate, Banks shall refund to Company the amount of such
excess or credit the amount of such excess against the principal amount of the
Notes and, in such event, Banks shall not be subject to any penalties provided
by any laws for contracting for, charging, taking, reserving or receiving
interest in excess of the Maximum Rate.

     13.10.    Offset.  Company hereby grants to Administrative Agent and each
Bank the right of offset, to secure repayment of the Notes, upon any and all
moneys, securities or other property of Company and the proceeds therefrom, now
or hereafter held or received by or in transit to Administrative Agent or Banks,
or any of them, or any of their agents, from or for the account of Company,
whether for safe keeping, custody, pledge, transmission, collection or
otherwise, and also upon any and all deposits (general or special) and credits
of Company, and any and all claims of Company against Administrative Agent or
Banks (or any of them) at any time existing.

     13.11.    Chapter 346.  Company, Administrative Agent and Banks hereby
agree that the provisions of Chapter 346 of the Texas Finance Code (regulating
certain revolving credit loans and revolving tri-party accounts) shall not apply
to the Loan Papers.

                                      -80-
<PAGE>
 
     13.12.    Entirety.  The Loan Papers embody the entire agreement between
the parties and supersede all prior agreements and understandings, if any,
relating to the subject matter hereof and thereof.

     13.13.    Headings.  Section headings are for convenience of reference only
and shall in no way affect the interpretation of this Loan Agreement.

     13.14.    Survival.  All representations and warranties made by Company
herein shall survive delivery of the Notes and the making of the Loans.

     13.15.    Successors and Assigns.

               (a) The provisions of this Loan Agreement shall be binding upon
and inure to the benefit of the parties hereto and their respective successors
and assigns, except that Company may not assign or otherwise transfer any of its
rights under this Loan Agreement without the prior written consent of all Banks.

               (b) Any Bank may at any time grant to one or more banks or other
institutions (each a "Participant") participating interests in its Commitment or
any or all of its Loans.  In the event of any such grant by a Bank of a
participating interest to a Participant, whether or not upon notice to Company,
Administrative Agent and Agents, such Bank shall remain responsible for the
performance of its obligations hereunder, and Company, Administrative Agent and
Agents shall continue to deal solely and directly with such Bank in connection
with such Bank's rights and obligations under this Agreement.  The rights and
entitlements of any Bank under Article 12 shall be determined for purposes of
this Loan Agreement on the basis of what such Bank would be entitled to receive
under this Loan Agreement had it not granted any participating interest to any
Participant, whether or not such Bank has in fact done so, and any election,
determination or approval to be made by Majority Banks pursuant to Section 12.06
shall be made solely and exclusively by Banks who are signatories hereto which
constitute Majority Banks, with no recognition being given to any Participant of
any such Bank.  Any agreement pursuant to which any Bank may grant such a
participating interest shall provide that such Bank shall retain the sole right
and responsibility to enforce the obligations of Company hereunder including,
without limitation, the right to approve any amendment, modification or waiver
of any provision of this Loan Agreement; provided that such participation
agreement may provide that such Bank will not agree to any modification,
amendment or waiver of any provision of this Loan Agreement which has the effect
of (i) adjusting the Participant's or any Bank's Commitment, (ii) reducing or
increasing the amount of principal or accrued interest otherwise due on any Note
or any fee payable by Company hereunder, (iii) postponing, extending, forbearing
or waiving the date on which any payment of principal, interest or fee is due
hereunder or extending the Maturity Date, (iv) modifying the amount of any
Scheduled Installment that may become due hereunder, or (v) modifying the
definition of Majority Banks hereof without the consent of the Participant and
may contain any other provisions, or such participation may take place on such
other terms, as such Bank deems appropriate.  An assignment or other transfer
which is not permitted by subsection (c) or (d) below shall be given effect for
purposes of this Loan Agreement only to the extent of a participating interest
granted in accordance with this subsection (b).

                                      -81-
<PAGE>
 
               (c) Any Bank may at any time assign to one or more banks or other
institutions (each an "Assignee") all or a portion of its rights and obligations
under this Loan Agreement and the Loan Papers, and such Assignee shall assume
such rights and obligations, pursuant to an instrument executed by such Assignee
and such transferor Bank, with (and subject to) notice to, and the consent of,
Company (which consent shall not be unreasonably withheld), Administrative Agent
and Agents; provided that if an Assignee is an affiliate of such transferor
Bank, such notice shall be given but no such consent shall be required; and
provided, further, that no assignment representing less than $5,000,000 in
Commitments shall be permitted without the prior consent of Administrative
Agent, Agents and Company, which consent may be withheld for any reason.  Upon
execution and delivery of such an instrument any payment by such Assignee to
such transferor Bank of an amount equal to the purchase price agreed between
such transferor Bank and such Assignee, such Assignee shall be a Bank party to
this Loan Agreement and shall have all the rights and obligations of a Bank with
Commitment(s) as set forth in such instrument of assumption, and the transferor
Bank shall be released from its obligations hereunder to a corresponding extent,
and no further consent or action by any party shall be required.  Upon the
consummation of any assignment pursuant to this subsection (c), the transferor
Bank, Administrative Agent and Company shall make appropriate arrangements so
that, if required, new Notes are issued to the Assignee.  In connection with any
such assignment, the transferor Bank shall pay to Administrative Agent an
administrative fee for processing such assignment in the amount of $3,500.  If
the Assignee is not incorporated under the laws of the United States of America
or a state thereof, it shall, prior to the first date on which interest or fees
are payable hereunder for its account, deliver to Company and Administrative
Agent certification as to exemption from deduction or withholding of any United
States federal income taxes on such form of certificate which is satisfactory to
Administrative Agent.

               (d) Any Bank may at any time assign all or any portion of its 
rights under this Agreement and its Note to a Federal Reserve Bank. No such
assignment shall release the transferor Bank from its obligations hereunder.

               (e) No Assignee or other transferee of any Bank's rights shall be
entitled to receive any greater payment under Article 12 than such Bank would
have been entitled to receive with respect to the rights transferred, unless
such transfer is made with Company's prior written consent or by reason of the
provisions of Article 12 requiring such Bank to designate a different lending
office under certain circumstances or at a time when the circumstances giving
rise to such greater payment did not exist.

     13.16     Foreign Banks, Participants, and Assignees.  Each Bank,
Participant (by accepting a participation interest under this Loan Agreement),
and Assignee (by executing an assignment and assumption agreement in a form
acceptable to Agents) that is not organized under the laws of the United States
of America or one of its states (a) represents to Administrative Agent and
Company that (i) no Taxes assessed by any Governmental Authority in the United
States are required to be withheld by Administrative Agent or Company with
respect to any payments to be made to it in respect of the Obligations and (ii)
it has furnished to Administrative Agent and Company two duly completed copies
of either U.S. Internal Revenue Service Form 4224, Form 1006, Form W-8, or other
form acceptable to Administrative Agent that entitles it to exemption from U.S.
federal withholding Tax on all interest payments under the Loan Papers, and (b)

                                      -82-
<PAGE>
 
covenants to (i) provide Administrative Agent and Company a new Form 4224, Form
1001, Form W-8, or other form acceptable to Administrative Agent upon the
expiration or obsolescence of any previously delivered form according to
applicable laws and regulations, duly executed and completed by it, and (ii)
comply from time to time with all applicable laws and regulations with regard to
the withholding tax exemption.  If any of the foregoing is not true or the
applicable forms are not provided, then Company and Administrative Agent
(without duplication) may deduct and withhold from interest payments under the
Loan Papers any United States federal income tax at the minimum rate under the
Internal Revenue Code of 1986, as amended, without reimbursement pursuant to
Section 4.08.

     13.17.    No Third Party Beneficiary.  The parties do not intend the
benefits of this Loan Agreement to inure to any third party, nor shall this Loan
Agreement be construed to make or render Administrative Agent, either Agent or
Banks liable to any materialmen, supplier, contractor, subcontractor, purchaser
or lessee of any property owned by Company, or for debts or claims accruing to
any such persons against Company.  Notwithstanding anything contained herein or
in the Notes, or in any other Loan Paper, or any conduct or course of conduct by
any or all of the parties hereto, before or after signing this Loan Agreement or
any of the other Loan Papers, neither this Loan Agreement nor any other Loan
Paper shall be construed as creating any right, claim or cause of action against
Administrative Agent, either Agent or Banks, or any of their officers,
directors, agents or employees, in favor of any materialmen, supplier,
contractor, subcontractor, purchaser or lessee of any property owned by Company,
nor to any other person or entity other than Company.

     13.18     Acknowledgements.  Company hereby acknowledges that:

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

               (b) neither the Administrative Agent, either Agent nor any Bank
has any fiduciary relationship with or duty to Company arising out of or in
connection with this Loan Agreement or any of the other Loan Papers, and the
relationship between Administrative Agent, either Agent and Banks, on one hand,
and Company, 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 
Papers or otherwise exists by virtue of the transactions contemplated hereby
among Banks or among Company and Banks.

     13.19.    Multiple Counterparts.  This Loan Agreement may be executed in
any number of counterparts, all of which taken together shall constitute one and
the same agreement, and any of the parties hereto may execute this Loan
Agreement by signing any such counterpart.

     13.20.    Notice and Acknowledgment of No Oral Agreements.  In
consideration of the making  of the Loan, and for other good and valuable
consideration, the receipt and sufficiency of which are acknowledged by Company
and Banks, Company and Banks (i) agree that Company and Banks' execution of this
Loan Agreement constitutes acknowledgment that each 

                                      -83-
<PAGE>
 
Bank and Company have read and understand this Loan Agreement; and (ii)
acknowledge receipt of the following Notice:

     NOTICE:   THIS LOAN AGREEMENT AND ALL OTHER LOAN PAPERS RELATING TO THIS
LOAN CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENT THE FINAL AGREEMENT
BETWEEN COMPANY AND BANKS AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF COMPANY AND BANKS.

     THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN COMPANY AND BANKS RELATING
TO THIS LOAN.

     IN WITNESS WHEREOF, the undersigned have executed this Loan Agreement as of
the day and year first above written.



                          [SIGNATURE PAGES TO FOLLOW]

                                      -84-
<PAGE>
 
                              COMPANY:
                              ------- 

                              CROSS TIMBERS OIL COMPANY,
                              a Delaware corporation


                              By:
                                    --------------------------------------------
                                    John O'Rear, Vice President and Treasurer

                                      -85-
<PAGE>
 
                              ADMINISTRATIVE AGENT
                              --------------------

                              MORGAN GUARANTY TRUST COMPANY
                               OF NEW YORK


                              By:
                                    --------------------------------------------
                                    John G. Kowalczuk, Vice President

                              Address for Notice:
                              ------------------ 
                              Morgan Guaranty Trust Company
                               of New York
                              60 Wall Street
                              New York, New York  10260
                              Telecopy No. (212) 648-5023

                                      -86-
<PAGE>
 
                              SYNDICATION AGENT:
                              ----------------- 

                              NATIONSBANK OF TEXAS, N.A.


                              By:
                                    --------------------------------------------
                                    J. Scott Fowler, Vice President

                              Address for Notice:
                              ------------------ 
                              NationsBank of Texas, N.A.
                              901 Main Street, The Plaza, 64th Floor
                              P. O. Box 830104
                              Dallas, Texas  75283-0104
                              Attention:  Energy Finance Division
                              Telecopy No: (214) 508-1285

                                      -87-
<PAGE>
 
                              CHASE BANK OF TEXAS, N.A.


                              By:
                                    --------------------------------------------
                                    Dale S. Hurd, Senior Vice President

                              Address for Notice:
                              ------------------ 
                              Chase Bank of Texas, N.A.
                              2200 Ross Avenue, 3rd Floor
                              Dallas, Texas  75201
                              Telecopy Number: (214) 965-2389

                                      -88-
<PAGE>
 
                              BANKS:
                              ----- 

                              MORGAN GUARANTY TRUST COMPANY
                               OF NEW YORK


                              By:
                                    John G. Kowalczuk, Vice President
                                    --------------------------------------------

                              Address for Notice:
                              ------------------ 

                              Domestic Lending Office
                              -----------------------
                              Morgan Guaranty Trust Company
                               of New York
                              60 Wall Street
                              New York, New York  10260
                              Telex number:  420230
                              Telecopy Number: (212) 648-5023

                              Eurodollar Lending Office
                              -------------------------
                              Morgan Guaranty Trust Company of New York,
                              Nassau Bahamas Office
                              c/o J.P. Morgan Services, Inc.
                              500 Stanton Christiana Road
                              Newark, Delaware  19713
                              Loan Operations, 3rd Floor

                                      -89-
<PAGE>
 
                              NATIONSBANK OF TEXAS, N.A.


                              By:
                                    --------------------------------------------
                                    J. Scott Fowler, Vice President

                              Address for Notice:
                              ------------------ 
                              NationsBank of Texas, N.A.
                              901 Main Street, The Plaza, 64th Floor
                              P. O. Box 830104
                              Dallas, Texas  75283-0104
                              Attention:  Energy Finance Division
                              Telecopy Number: (214) 508-1285

                                      -90-
<PAGE>
 
                              CHASE BANK OF TEXAS, N.A.


                              By:
                                    --------------------------------------------
                                    Dale S. Hurd, Senior Vice President

                              Address for Notice:
                              ------------------ 
                              Chase Bank of Texas, N.A.
                              2200 Ross Avenue, 3rd Floor
                              Dallas, Texas  75201
                              Telecopy Number: (214) 965-2389

                                      -91-
<PAGE>
 
                              BANKBOSTON, N.A.


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

                              Address for Notice:
                              ------------------ 
                              BankBoston, N.A.
                              100 Federal Street, M/S 01-08-04
                              Boston, Massachusetts  02110
                              Telecopy Number: (617) 434-3652

                                      -92-
<PAGE>
 
                              WELLS FARGO BANK (TEXAS), N.A.


                              By:
                                    --------------------------------------------
                                    Charles D. Kirkham, Vice President

                              Address for Notice:
                              ------------------ 
                              Wells Fargo Bank (Texas), N.A.
                              1445 Ross Avenue, Suite 400
                              Dallas, Texas  75202-2812
                              Telecopy Number: (214) 777-4044

                                      -93-
<PAGE>
 
                              OVERTON BANK AND TRUST, N.A.


                              By:
                                    --------------------------------------------
                                    W.H. (Bill) Adams, III, Senior Vice
                                     President

                              Address for Notice:
                              ------------------ 
                              Overton Bank and Trust, N.A.
                              Continental Plaza, Suite 100
                              777 Main Street
                              Fort Worth, Texas  76102-5304
                              Telecopy Number: (817) 336-5615

                                      -94-
<PAGE>
 
                              ABN-AMRO BANK N.V., HOUSTON AGENCY
                              By:   ABN-AMRO NORTH AMERICA, INC.


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


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

                              Address for Notice:
                              ------------------ 
                              ABN-AMRO Bank N.V., Houston Agency
                              Three Riverway, Suite 1700
                              Houston, Texas  77056
                              Telecopy Number: (713) 629-7533

                                      -95-
<PAGE>
 
                              BANK OF MONTREAL


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

                              Address for Notice:
                              ------------------ 
                              Bank of Montreal
                              700 Louisiana, Suite 4400
                              Houston, Texas  77002
                              Telecopy Number: (713) 223-4007

                                      -96-
<PAGE>
 
                              THE BANK OF NEW YORK


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

                              Address for Notice:
                              ------------------ 
                              Bank of New York
                              One Wall Street, 19th Floor
                              New York, NY  10286
                              Telecopy Number: (212) 635-7923

                                      -97-
<PAGE>
 
                              BANQUE PARIBAS


                              By:
                                    --------------------------------------------
                                    Mike Fiuzat, Vice President

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

                              Address for Notice:
                              ------------------ 
                              Banque Paribas
                              1200 Smith, Suite 3100
                              Houston, Texas  77002
                              Attention: Mike Fiuzat
                              Telecopy Number: (713) 659-6915

                                      -98-
<PAGE>
 
                              CREDIT LYONNAIS NEW YORK BRANCH


                              By:
                                    --------------------------------------------
                                    Philippe Soustra, Senior Vice President

                              Address for Notice:
                              ------------------ 
                              Credit Lyonnais Houston Representative Office
                              1000 Louisiana, Suite 5360
                              Houston, Texas  77002
                              Attention:  John M. Falbo,
                                          Vice President and Group Head
                              Telecopy Number: (713) 751-0307

                                      -99-
<PAGE>
 
                              BANK OF AMERICA NATIONAL TRUST AND 
                              SAVINGS ASSOCIATION


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

                              Address for Notice:
                              ------------------ 
                              3 Allen Center
                              333 Clay Street, Suite 4550
                              Houston, Texas  77002-4103
                              Attention:  Ron McKaig
                              Telecopy Number: (713) 651-4888

                              Addresses for Borrowing Notices:
                              ------------------------------- 
                              231 South LaSalle Street
                              Chicago, Illinois  60697
                              Attention:  Debbie Aguilar
                              Telecopy Number: (312) 974-9626

                                     -100-
<PAGE>
 
                              FIRST UNION NATIONAL BANK


                              By:  
                                    --------------------------------------------
                                    Michael J. Kolosowsky, Vice President

                              Address for Notice:
                              ------------------ 
                              1001 Fannin Street
                              Suite 2255
                              Houston, Texas  77002-6709
                              Attention: Paul Riddle
                              Telecopy Number: (713) 650-6354

                                     -101-
<PAGE>
 
                              BANK ONE, TEXAS, N.A.


                              By:  
                                    --------------------------------------------
                                    John S. Warren, Vice President


                              Address for Notice:
                              ------------------ 
                              500 Throckmorton St., 10th Floor
                              Fort Worth, Texas  76102
                              Attention:  John S. Warren, Vice President
                              Telecopy Number:  (817) 884-5622

                                     -102-
<PAGE>
 
                              NATEXIS Banque


                              By:  
                                    --------------------------------------------
                                    Timothy L. Polvado, Vice President


                              By:  
                                    --------------------------------------------
                                    Eric Ditges, Assistant Vice President

                              Address for Notice:
                              ------------------ 
                              333 Clay St., Suite 4340
                              Houston, Texas  77002
                              Attention: Timothy L. Polvado
                              Telecopy Number:  (713) 759-9908

                                     -103-
<PAGE>
 
                              THE BANK OF NOVA SCOTIA


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

                              Address for Notice:
                              ------------------ 
                              The Bank of Nova Scotia
                              1100 Louisiana, Suite 3000
                              Houston, Texas  77002
                              Attention:  Mark Ammerman
                              Telecopy Number:  (713)752-2425

                                     -104-
<PAGE>
 
                              COMERICA BANK-TEXAS


                              By:  
                                    --------------------------------------------
                                    David L. Montgomery, Vice President

                              Address for Notice:
                              ------------------ 
                              1601 Elm St., 2nd Floor
                              Dallas, Texas  75201
                              Attention:  David L. Montgomery
                              Telecopy Number:  (214) 969-6561



                                     -105-
<PAGE>
 
                                    EXHIBITS
                                       TO
                        REVOLVING CREDIT LOAN AGREEMENT
 
 
"A"   -   Form of Revolving Promissory Note
 
"B"   -   Request for Floating Base Borrowing
 
"C"   -   Request For CD Borrowing
 
"D"   -   Request for Eurodollar Borrowing
 
"E"   -   Scheduled Installment Certificate
 
"F"   -   List of Subsidiaries
 
"G"   -   Opinion of Counsel for Company (Kelly, Hart & Hallman, P.C.)
 
"H"   -   Form of Corporate General Certificate
 
                                   SCHEDULES
                                       TO
                        REVOLVING CREDIT LOAN AGREEMENT

"I"   -   List of Banks and each Bank's Percentage and share of the initial
Commitment


                                     -106-
<PAGE>
 
                                  EXHIBIT "A"

                           REVOLVING PROMISSORY NOTE


$_____________                New York, New York                 April 17, 1998


     1.   FOR VALUE RECEIVED, CROSS TIMBERS OIL COMPANY, a Delaware corporation
("Maker"), hereby unconditionally promise to pay to the order of
______________________________ ("Payee") at the principal office of Morgan
Guaranty Trust Company of New York, the sum of
______________________________________ AND NO/100 DOLLARS ($_____________) (or,
if less, so much thereof as may be advanced by Payee to Maker pursuant to
Section 2.01 of the Loan Agreement), in lawful money of the United States of
America.  Capitalized terms not defined herein shall have the meaning assigned
to such terms in the Loan Agreement referred to below.

     2.   The unpaid principal amount of, and accrued unpaid interest on, this
Note shall be payable in accordance with the Loan Agreement, but not later than
June 30, 2003.

     3.   The unpaid principal amount of all Advances hereunder shall bear
interest from the date of advance until maturity at a rate per annum which is
provided in the Loan Agreement and which is selected by Maker pursuant to the
Loan Agreement.  The interest rate specified in this section shall be subject to
adjustment under the circumstances described in the Loan Agreement.  Interest
shall be computed in the manner provided in the Loan Agreement.

     4.   Regardless of any provision contained in this Note, the Loan Agreement
or any other document executed or delivered in connection therewith, Payee shall
never be deemed to have contracted for or be entitled to receive, collect or
apply as interest on this Note, any amount in excess of the Maximum Rate, and,
in the event that Payee ever receives, collects or applies as interest any such
excess, such amount which would be excessive interest shall be applied to the
reduction of the unpaid principal balance of this Note, and, if the principal
balance of this Note is paid in full, any remaining excess shall forthwith be
paid to Maker.  In determining whether or not the interest paid or payable under
any specific contingency exceeds the highest Maximum Rate, Maker and Payee
shall, to the maximum extent permitted under applicable law, (i) characterize
any non-principal payment (other than payments which are expressly designated as
interest payments hereunder) as an expense or fee rather than as interest, (ii)
exclude voluntary prepayments and the effect thereof, and (iii) spread the total
amount of interest throughout the entire contemplated term of this Note so that
the interest rate is uniform throughout such term.

     5.   This Note has been executed and delivered pursuant to, and is subject
to, that certain Revolving Credit Agreement dated April 17, 1998, among Maker,
Banks (as defined therein), Morgan Guaranty Trust Company of New York, as
Administrative Agent, NationsBank of Texas, N.A, as Syndication Agent, and Chase
Bank of Texas, N.A. as Documentation Agent (the "Loan Agreement"), and this Note
is one of the "Notes" referred to in the Loan Agreement, 
<PAGE>
 
and the holder of this Note shall be entitled to the benefits provided in the
Loan Agreement. Reference is hereby made to the Loan Agreement for a statement
of (i) the prepayment rights and obligations of Maker and (ii) the events upon
which the maturity of this Note may be accelerated.

     6.   Should the principal of, or any installment of interest on, this Note
become due and payable on a day other than a Business Day, then the maturity
thereof shall be extended to the next succeeding Business Day.  If this Note, or
any installment or payment due hereunder is not paid when due, whether at
maturity or by acceleration, or if it is collected through any legal proceeding
at law or in equity, or in bankruptcy, receivership, probate or other court
proceedings, Maker agrees to pay all costs of collection, including, but not
limited to, attorneys' fees and court costs incurred by the holder hereof.  All
past-due principal of, and, to the extent permitted by applicable law, interest
on, this Note shall bear interest until paid at the lesser of (a) the Floating
Base Rate from time to time in effect, plus three percent (3%), or (b) the
Maximum Rate.

     7.   Maker and all sureties, endorsers, guarantors and other parties ever
liable for payment of any sums payable pursuant to the terms of this Note,
jointly and severally waive demand, presentment for payment, protest, notice of
protest, notice of acceleration, notice of intent to accelerate, diligence in
collection, the bringing of any suit against any party and any notice of or
defense on account of any extensions, renewals, partial payment or changes in
any manner of or in this Note or in any of its terms, provisions and covenants,
or any releases or substitutions of any security, or any delay, indulgence or
other act of any trustee or any holder hereof, whether before or after maturity.

     8.   All Advances made by Payee or Administrative Agent on behalf of Payee,
the respective Interest Periods thereof, and all repayments of the principal
thereof shall be recorded by Payee or Administrative Agent on behalf of Payee
and, prior to any transfer hereof, endorsed by Payee or Administrative Agent on
behalf of Payee on the schedule attached hereto, or on a continuation of such
schedule attached to and a part hereof, provided that the failure of Payee to
make any such recordation of endorsement shall not affect the Obligations of
Maker hereunder or under the Loan Agreement.

                                   MAKER:

                                   CROSS TIMBERS OIL COMPANY, a Delaware 
                                   corporation


                                   By:
                                      -----------------------------------------
                                      John O'Rear, Vice President and Treasurer
 


                                      -2-
<PAGE>
 
                 SCHEDULE OF ADVANCES AND PAYMENTS OF PRINCIPAL
                 ----------------------------------------------
<TABLE>
<CAPTION>
 
                                                Unpaid      Unpaid
                                    Amount of  Principal  Principal
        Amount    Type              Principal   Balance   Balance of
          of       of     Interest   Paid or      of      Promissory  Notation
Date    Advance  Advance   Period    Prepaid    Advance      Note     Made By
- ------------------------------------------------------------------------------
<S>     <C>      <C>      <C>       <C>        <C>        <C>         <C>

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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


                                     -3- 
</TABLE>
<PAGE>
 
                                  EXHIBIT "B"

                      REQUEST FOR FLOATING BASE BORROWING
                      -----------------------------------

          1.  This Request for Floating Base Borrowing is executed and delivered
by Cross Timbers Oil Company, a Delaware corporation ("Borrower"), to Morgan
Guaranty Trust Company of New York, as "Administrative Agent", pursuant to
Section 2.02 of that certain Revolving Credit Agreement dated as of April 17,
1998, among Borrower, Banks, Agents therein named and the Administrative Agent
(the "Agreement").  Any terms used herein and not defined herein shall have the
meaning assigned to them in the Agreement.

          2.  Borrower hereby requests that Banks make a Floating Base Borrowing
to Borrower pursuant to the Agreement as follows:

          (a)  Amount of Floating Base Borrowing:       $ _______________.

          (b)  Date of Floating Base Borrowing:    _________________, 199__.

          (c)  Nature of Floating Base Borrowing (check one box only):

               [ ]   Advance (new money).


               [ ]   Rollover of prior Floating Base Borrowing.


               [ ]   Conversion from prior Borrowing.


          (d)  Borrowing Base Percentage after giving effect
               to the requested Borrowing hereunder:             _______%.

          3.   Borrower hereby represents, warrants, and certifies to Banks that
as of the date of the Floating Base Borrowing requested herein:

          (a)  There exists no Event of Default or event which with notice or
lapse of time or both could constitute an Event of Default.

          (b)  Borrower has performed and complied with all agreement and
conditions contained in the Agreement which are required to be performed or
complied with by Borrower.

          (c)  The representations and warranties contained in the Section 6 of
the Agreement are true in all respects, with the same force and effect as though
made on and as of the date of this Floating Base Borrowing, except that, if this
Borrowing is a rollover or conversion of a prior Borrowing but does not
constitute an Advance for new money, Borrower does not warrant or represent that
no Material Adverse Effect has occurred in the financial condition or business
of Borrower or a Subsidiary, as provided in Section 6.06 of the Agreement.
<PAGE>
 
          4.   This Request for Floating Base Borrowing is executed on
_______________, 19__, by an authorized officer of Cross Timbers Oil Company.
The undersigned, in such capacity, hereby certifies each and every matter
contained herein to be true and correct.

                                     CROSS TIMBERS OIL COMPANY,
                                     a Delaware corporation


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


                                      -2-
<PAGE>
 
                                  EXHIBIT "C"

                            REQUEST FOR CD BORROWING
                            ------------------------

          1.  This Request for CD Borrowing is executed and delivered by Cross
Timbers Oil Company, a Delaware corporation ("Borrower"), to Morgan Guaranty
Trust Company of New York, as "Administrative Agent", pursuant to Section 2.02
of that certain Revolving Credit Agreement dated as of April 17, 1998, among
Borrower, the Banks and Agents therein named and the Administrative Agent (the
"Agreement").  Any terms used herein and not defined herein shall have the
meaning assigned to them in the Agreement.

          2.  Borrower hereby requests that Banks make a CD Borrowing to
Borrower pursuant to the Agreement as follows:
 
          (a) Amount of CD Borrowing:     $ _______________.
 
          (b) Date of CD Borrowing:    _________________, 199__.
 
          (c) CD Interest Period:        __________________-day.

          (d) Nature of CD Borrowing (check one box only):

              [ ]  Advance (new money).


              [ ]  Rollover of prior CD Borrowing.


              [ ]  Conversion from prior Borrowing.


          (e) Borrowing Base Percentage after giving effect
              to the requested Borrowing hereunder:      _______%.

          3.  Borrower hereby represents, warrants, and certifies to Banks that
as of the date of the CD Borrowing requested herein:

          (a) There exists no Event of Default or event which with notice or
lapse of time or both could constitute an Event of Default.

          (b) Borrower has performed and complied with all agreement and
conditions contained in the Agreement which are required to be performed or
complied with by Borrower.

          (c) The representations and warranties contained in the Section 6 of
the Agreement are true in all respects, with the same force and effect as though
made on and as of the date of this CD Borrowing, except that, if this Borrowing
is a rollover or conversion of a prior Borrowing but does not constitute an
Advance for new money, Borrower does not warrant or represent that no Material
Adverse Effect has occurred in the financial condition or business of Borrower
or a Subsidiary, as provided in Section 6.06 of the Agreement.
<PAGE>
 
          4.  This Request for CD Borrowing is executed on _______________,
19__, by an authorized officer of Cross Timbers Oil Company.  The undersigned,
in such capacity, hereby certifies each and every matter contained herein to be
true and correct.

                                    CROSS TIMBERS OIL COMPANY,
                                    a Delaware corporation


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


                                      -2-
<PAGE>
 
                                  EXHIBIT "D"

                       REQUEST FOR EURODOLLAR BORROWING
                       --------------------------------

          1.  This Request for Eurodollar Borrowing is executed and delivered by
Cross Timbers Oil Company, a Delaware corporation ("Borrower"), to Morgan
Guaranty Trust Company of New York, as "Administrative Agent", pursuant to
Section 2.02 of that certain Revolving Credit Agreement dated as of April 17,
1998, among Borrower, Banks and Agents therein named and the Administrative
Agent (the "Agreement").  Any terms used herein and not defined herein shall
have the meaning assigned to them in the Agreement.

          2.  Borrower hereby requests that Banks make a Eurodollar Borrowing to
Borrower pursuant to the Agreement as follows:
 
          (a) Amount of Eurodollar Borrowing:     $ _______________.
 
          (b) Date of Eurodollar Borrowing:    _________________, 199__.
 
          (c) Eurodollar Interest Period:    ______________________-day.

          (d) Nature of Eurodollar Borrowing (check one box only):

              [ ]  Advance (new money).

              [ ]  Rollover of prior Eurodollar Borrowing.

              [ ]  Conversion from prior Borrowing.

          (e) Borrowing Base Percentage after giving effect
              to the requested Borrowing hereunder:        _______%.

          3.  Borrower hereby represents, warrants, and certifies to Banks that
as of the date of the Eurodollar Borrowing requested herein:

          (a) There exists no Event of Default or event which with notice or
              lapse of time or both could constitute an Event of Default.

          (b) Borrower has performed and complied with all agreement and
              conditions contained in the Agreement which are required to be
              performed or complied with by Borrower.

          (c) The representations and warranties contained in the Section 6 of
              the Agreement are true in all respects, with the same force and
              effect as though made on and as of the date of this Eurodollar
              Borrowing, except that, if this Borrowing is a rollover or
              conversion of a prior Borrowing but does not constitute an Advance
              for new money, Borrower does not warrant or represent that no
              Material Adverse Effect has occurred in the financial condition or
              business of Borrower or a Subsidiary, as provided in Section 6.06
              of the Agreement.
<PAGE>
 
          4.  This Request for Eurodollar Borrowing is executed on
_______________, 19__, by an authorized officer of Cross Timbers Oil Company.
The undersigned, in such capacity, hereby certifies each and every matter
contained herein to be true and correct.

                                            CROSS TIMBERS OIL COMPANY,
                                            a Delaware corporation


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


                                      -2-


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