UNION TEXAS PETROLEUM HOLDINGS INC
10-Q, 1996-04-25
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1
                                   FORM 10-Q

                       SECURITIES AND EXCHANGE COMMISSION

                            WASHINGTON, D.C.  20549



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

FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1996

                                       OR

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

COMMISSION FILE NUMBER 1-9019

                      UNION TEXAS PETROLEUM HOLDINGS, INC.
             (Exact name of registrant as specified in its charter)

                 DELAWARE                              76-0040040
       (State or other jurisdiction of              (I.R.S. Employer
       incorporation or organization)               Identification No.)

                               1330 POST OAK BLVD.
                              HOUSTON, TEXAS 77056
                              (Address of principal
                                executive offices
                                  and zip code)

                                 (713) 623-6544
              (Registrant's telephone number, including area code)

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

As of April 19, 1996,  there were  87,641,896  shares of Union Texas  Petroleum
Holdings,  Inc.  $.05 par value Common Stock issued and outstanding.


<PAGE>   2
                                   FORM 10-Q
                          PART I-FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

                      UNION TEXAS PETROLEUM HOLDINGS, INC.
                           CONSOLIDATED BALANCE SHEET
                             (DOLLARS IN THOUSANDS)
<TABLE>
<CAPTION>

                                                                                      MARCH 31,       DECEMBER 31,
                                                                                        1996             1995
                                                                                     ----------       ------------
                                          ASSETS                                    (UNAUDITED)
<S>                                                                                  <C>               <C>
Current assets:
      Cash and cash equivalents.................................................     $   11,860        $   11,069
      Accounts and notes receivable, less allowance for doubtful accounts.......         72,967            77,517
      Inventories...............................................................         42,382            42,764
      Prepaid expenses and other current assets.................................         24,945            27,924
                                                                                     ----------        ----------
          Total current assets..................................................        152,154           159,274
Equity investment...............................................................        105,639           108,476
Property, plant and equipment, at cost, less accumulated
      depreciation, depletion and amortization*.................................      1,521,206         1,551,198
Other assets   .................................................................         17,384            17,870
                                                                                     -----------       ----------
          Total assets..........................................................     $1,796,383        $1,836,818
                                                                                     ==========        ==========

                           LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
      Current portion of long-term debt ........................................     $    2,292        $    2,292
      Accounts payable..........................................................         88,494            95,768
      Taxes payable.............................................................         66,630            55,779
      Other current liabilities.................................................         46,768            41,704
                                                                                     -----------       ----------
          Total current liabilities.............................................        204,184           195,543
Long-term debt .................................................................        640,796           712,132
Deferred income taxes...........................................................        383,934           395,289
Other liabilities...............................................................        107,923           110,064
                                                                                     ----------        ----------
          Total liabilities.....................................................      1,336,837         1,413,028
                                                                                     ----------        ----------
Stockholders' equity:
      Common stock..............................................................          4,391             4,391
      Paid in capital...........................................................         19,234            19,405
      Cumulative foreign exchange translation adjustment and other..............        (83,102)          (75,077)
      Retained earnings.........................................................        522,800           479,620
      Common stock held in treasury, at cost:
          205,167 shares at March 31, 1996 and 247,145  shares at
          December 31, 1995.....................................................         (3,777)           (4,549)
                                                                                     ----------       -----------
          Total stockholders' equity............................................        459,546           423,790
                                                                                     ----------        ----------
          Total liabilities and stockholders' equity............................     $1,796,383        $1,836,818
                                                                                     ==========        ==========
</TABLE>

*   The Company follows the successful efforts method of accounting for oil and
    gas activities.

    The accompanying notes are an integral part of this financial statement.

                                       1
<PAGE>   3
                                   FORM 10-Q

                      UNION TEXAS PETROLEUM HOLDINGS, INC.

                      CONSOLIDATED STATEMENT OF OPERATIONS
                 (DOLLARS IN THOUSANDS EXCEPT PER SHARE AMOUNTS)
                                   (UNAUDITED)
<TABLE>
<CAPTION>
                                                                                        THREE MONTHS ENDED MARCH 31,
                                                                                        ----------------------------
                                                                                             1996          1995
                                                                                             ----          ----
<S>                                                                                       <C>            <C>
Revenues:
     Sales and operating revenues....................................................      $258,178      $239,558
     Interest income and other revenues..............................................           165           707
     Net earnings of equity investee.................................................         9,213         5,408
                                                                                           --------      --------
                                                                                            267,556       245,673

Costs and other deductions:
     Product costs and operating expenses............................................        80,064        79,177
     Exploration expenses............................................................        14,207        15,550
     Depreciation, depletion and amortization........................................        54,855        46,544
     Selling, general and administrative expenses....................................         5,751         6,170
     Interest expense................................................................         7,848         5,269
                                                                                           --------      --------
Income before income taxes...........................................................       104,831        92,963
Income taxes.........................................................................        57,270        46,286
                                                                                           --------      --------

Net income ..........................................................................      $ 47,561      $ 46,677
                                                                                           ========      ========

Earnings per share of common stock...................................................      $    .54      $    .53
                                                                                           ========      ========

Dividends per share of common stock..................................................      $    .05      $    .05
                                                                                           ========      ========

Weighted average number of  shares outstanding (000's)                                       87,598        87,637
                                                                                           ========      ========
</TABLE>

    The accompanying notes are an integral part of this financial statement.

                                       2
<PAGE>   4
                                   FORM 10-Q

                      UNION TEXAS PETROLEUM HOLDINGS, INC.

                      CONSOLIDATED STATEMENT OF CASH FLOWS
                             (Dollars in thousands)
                                  (Unaudited)
<TABLE>
<CAPTION>

                                                                                           THREE MONTHS ENDED MARCH 31,
                                                                                           ---------------------------
                                                                                             1996               1995
                                                                                             ----               ----
<S>                                                                                       <C>                  <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
     Net income........................................................................   $ 47,561             $46,677
     Adjustment to reconcile net income to net cash provided by operating activities:
        Depreciation, depletion and amortization.......................................     54,855              46,544
        Deferred income taxes..........................................................     (7,700)             (1,982)
        Net income of equity investee..................................................     (9,213)             (5,408)
        Other..........................................................................          2                (590)
                                                                                          --------           ---------
           Net cash provided by operating activities before changes in other
             assets and liabilities....................................................     85,505              85,241

        Decrease (increase) in accounts and notes receivable...........................      4,350             (10,861)
        Decrease  in inventories.......................................................        518               1,679
        Decrease in prepaid expenses and other assets..................................      3,144               2,729
        Decrease in accounts payable and other liabilities.............................     (9,047)            (19,727)
        Increase in income taxes payable...............................................     10,930               1,809
                                                                                          --------           ---------
           Net cash provided by operating activities...................................     95,400              60,870
                                                                                          --------           ---------

CASH FLOWS FROM INVESTING ACTIVITIES:
     Additions to property, plant and equipment........................................    (32,044)            (27,102)
     Cash  provided by equity investee.................................................     12,050               8,200
     Other ............................................................................                           (612)
                                                                                          --------           ---------
        Net cash required by investing activities......................................    (19,994)            (19,514)
                                                                                           -------           ---------

CASH FLOWS FROM FINANCING ACTIVITIES:

     Net proceeds from issuance of long-term debt......................................     12,869             123,476
     Net payments under the credit facilities..........................................    ( 7,000)           (118,819)
     Net payments on money market lines of credit......................................    (75,942)            (36,755)
     Dividends.........................................................................     (4,380)             (4,381)
     Proceeds from issuance of treasury stock..........................................        911                 364
     Purchase of treasury stock........................................................     (1,073)
                                                                                          --------           ---------
        Net cash required by financing activities......................................    (74,615)            (36,115)
                                                                                          --------           ---------

     Net increase in cash and cash equivalents.........................................        791               5,241

     Cash and cash equivalents at beginning of period..................................     11,069               8,389
                                                                                          --------           ---------

     Cash and cash equivalents at end of period........................................   $ 11,860           $  13,630
                                                                                          ========           =========

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:                            
     Cash paid during the period for:
        Interest (net of amount capitalized)...........................................   $  4,679            $  4,703
        Income taxes...................................................................     56,909              46,014
</TABLE>

    The accompanying notes are an integral part of this financial statement.


                                       3
<PAGE>   5
                                   FORM 10-Q
                      UNION TEXAS PETROLEUM HOLDINGS, INC.
                         NOTES TO FINANCIAL STATEMENTS
                (DOLLARS IN THOUSANDS EXCEPT PER SHARE AMOUNTS)

NOTE 1 - BASIS OF PRESENTATION - These consolidated financial statements should
be read in the context of the consolidated financial statements and notes
thereto filed with the Commission in the Company's 1995 annual report on Form
10-K. In the opinion of management, the accompanying unaudited consolidated
financial statements reflect all adjustments, consisting only of normal
adjustments, necessary to present fairly the financial position of Union Texas
Petroleum Holdings, Inc. and its consolidated subsidiaries at March 31, 1996,
and the results of operations and cash flows for the three months ended March
31, 1996 and 1995. The results of operations for the three months ended March
31, 1996, should not necessarily be taken as indicative of the results of
operations that may be expected for the entire year 1996.

NOTE 2 - INVENTORY ACCOUNTING CHANGE - Effective January 1, 1996, the Company
changed the method of accounting for valuing its petrochemical product inventory
from the last-in, first out ("LIFO") method to the first-in, first out ("FIFO")
method. The change did not have a material effect on the results of operations
for prior periods, nor is it anticipated that it will have a material impact on
future periods. The Company believes that use of the FIFO method will result in
a better measurement of operating results and better reflects the current value
of inventory on the balance sheet.

NOTE 3 - CREDIT FACILITIES - The Company had two unsecured bank credit
facilities (the "Credit Facilities") at March 31, 1996. One of the Credit
Facilities is a $100 million revolver that provides for conversion of amounts
outstanding on March 15, 1997 to a one-year term loan maturing March 15, 1998.
Another Credit Facility is a $450 million revolver that reduces quarterly by
$35 million beginning June 30, 2000, with a final maturity of March 31, 2001.
In addition to such Credit Facilities, the Company has the ability to obtain
short-term borrowings on uncommitted and unsecured lines of credit with several 
banks.

NOTE 4 - ACCOUNTING PRONOUNCEMENTS RECENTLY ISSUED - In October 1995, the
Financial Accounting Standards Board released Statement of Financial Accounting
Standards No. 123, "Accounting for Stock-Based Compensation," which establishes
financial and reporting standards for stock based employee compensation plans
that will be effective for the Company's 1996 financial statements. The
statement encourages, but does not require, companies to adopt a fair value
based method of accounting for such plans in place of current accounting
standards. Companies electing to continue to use their existing accounting
methods will be required to make pro forma disclosures of net income assuming a
fair value based method of accounting has been applied. The Company will
continue to use its current accounting methods with additional disclosures.

NOTE 5 - HEDGING ACTIVITIES - The Company may enter into hedging contracts from
time to time in order to minimize the impact of adverse price fluctuation. In
the first quarter of 1996, the Company entered into financial hedging futures
contracts to offset a portion of its North Sea crude. The Company will continue
to consider other opportunities in its risk management activities, such as swaps
or fixed price contracts to mitigate the adverse movement in oil and gas prices.
Gains or losses on these hedging activities are recognized in sales revenues
when the underlying exposed hedged production is sold. As of March 31, 1996, the
Company had open contracts for 474,000 barrels of oil at an average Brent price
of $16.51 per barrel which will be settled by August 1996.

NOTE 6 - CONTINGENCIES - The Company and its subsidiaries and related companies
are named defendants in a number of lawsuits and named parties in numerous
government proceedings arising in the ordinary course of business. While the
outcome of contingencies, lawsuits or other proceedings against the Company
cannot be predicted with certainty, management expects that any liability, to
the extent not provided for through insurance or otherwise, will not have a
material adverse effect on the financial statements of the Company.



                                       4

<PAGE>   6
                      UNION TEXAS PETROLEUM HOLDINGS, INC.

With respect to the unaudited consolidated financial information of Union Texas
Petroleum Holdings, Inc. for the three-month periods ended March 31, 1996 and
1995, Price Waterhouse LLP reported that they have applied limited procedures in
accordance with professional standards for a review of such information.
However, their separate report dated April 23, 1996 appearing below, states that
they did not audit and they do not express an opinion on that unaudited
consolidated financial information. Price Waterhouse LLP has not carried out any
significant or additional audit tests beyond those which would have been
necessary if their report had not been included. Accordingly, the degree of
reliance on their report on such information should be restricted in light of
the limited nature of the review procedures applied. Price Waterhouse LLP is not
subject to the liability provisions of section 11 of the Securities Act of 1933
for their report on the unaudited consolidated financial information because
that report is not a "report" prepared or certified by Price Waterhouse LLP
within the meaning of sections 7 and 11 of the Act.

                  REPORT ON REVIEW BY INDEPENDENT ACCOUNTANTS



To the Board of Directors
of Union Texas Petroleum Holdings, Inc.



We have reviewed the accompanying consolidated balance sheet of Union Texas
Petroleum Holdings, Inc. and consolidated subsidiaries as of March 31, 1996 and
the related consolidated statements of operations and of cash flows for the
three month periods ended March 31, 1996 and 1995. This financial information is
the responsibility of the Company's management.

We conducted our review in accordance with standards established by the American
Institute of Certified Public Accountants. A review of interim financial
information consists principally of applying analytical review procedures to
financial data and making inquiries of persons responsible for financial and
accounting matters. It is substantially less in scope than an audit conducted in
accordance with generally accepted auditing standards, the objective of which is
the expression of an opinion regarding the financial statements taken as a
whole. Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material modifications that should
be made to the accompanying financial information for it to be in conformity
with generally accepted accounting principles.

We previously audited in accordance with generally accepted auditing standards,
the consolidated balance sheet as of December 31, 1995, and the related
consolidated statements of operations, of cash flows, and of stockholders'
equity for the year then ended (not presented herein), and in our report dated
February 14, 1996 we expressed an unqualified opinion on those consolidated
financial statements. In our opinion, the information set forth in the
accompanying consolidated balance sheet information as of December 31, 1995, is
fairly stated in all material respects in relation to the consolidated balance
sheet from which it has been derived.



PRICE WATERHOUSE LLP

Houston, Texas
April 23, 1996


                                       5

<PAGE>   7
ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS

The following discussion should be read in conjunction with the financial
statements, notes, and management's discussion contained in the registrant's
1995 annual report on Form 10-K, and condensed financial statements and notes
contained in this report.

RESULTS OF OPERATIONS

THREE MONTHS ENDED MARCH 31, 1996 COMPARED WITH THREE MONTHS ENDED MARCH 31,
1995

Net income for the three months ended March 31, 1996, was $48 million, or $.54
per share as compared to net income of $47 million, or $.53 per share reported
for the same period in 1995. The current quarter was favorably impacted by
higher crude oil sales volumes and higher oil and LNG prices, partially offset
by lower ethylene margins.

Sales and operating revenues for the three months ended March 31, 1996, were
$258 million, as compared to $240 million for the first quarter of 1995.
International revenues totaled $217 million as compared to $184 million for the
first quarter of 1995. In the U.K., sales and operating revenues increased by
$19 million due to increased sales volumes, primarily as a result of the July
1995 acquisition of the Alba field, and due to higher crude oil prices. In
Indonesia, sales increased $11 million from the same period in 1995 due to
higher prices and higher oil volumes. In Pakistan, sales were $3 million above
1995 primarily due to higher crude oil volumes and prices.

Petrochemical revenues totaled $41 million as compared to $55 million in the
first quarter of 1995, while operating profit was $4 million as compared to $19
million in the prior period. The decrease was primarily due to lower ethylene
sales prices and increased feedstock costs which resulted in a decrease in
ethylene margins to 3 cents per pound in 1996 vs. 16 cents per pound in 1995 and
due to lower sales volumes.

Average prices received and volumes sold by the Company's major operations
during the first quarter of 1996 and 1995, respectively, were as follows:

<TABLE>
<CAPTION>
                                                              PRICES                             VOLUMES
                                                                                              (000S PER DAY)

                                                        1996            1995                1996           1995
                                                        ----            ----                ----           ----
<S>                                                   <C>            <C>                   <C>            <C>
Crude oil (barrels):
     U.K.                                             $18.09          $16.34                  46             37
     Pakistan                                          16.17           14.62                   6              5
     Indonesia                                         18.34           17.28                   8              6
Indonesian LNG (Mcf)                                    3.30            3.07                 241            242
Pakistan natural gas (Mcf)                              1.29            1.30                  43             43
U.K. natural gas (Mcf)                                  2.50            3.01                  59             44
U.S. ethylene (pounds)                                   .18             .28               1,180          1,338

</TABLE>

Depreciation, depletion and amortization increased by $8 million due to higher
volumes. Interest expense increased by $3 million during the period due to
higher levels of debt, primarily due to the funding of the Alba acquisition
during the third quarter of 1995 and higher interest rates. The effective tax
rate increased from the prior year due primarily to the decrease in U.S.
petrochemical income, which is taxed at lower rates.


                                       6

<PAGE>   8
FINANCIAL CONDITION

Cash flow from operations: Net cash provided by operating activities was $95
million in the first quarter of 1996, an increase of $35 million from the same
period in the prior year. The improvement was primarily the result of higher
international oil volumes and prices and increased LNG prices, partially offset
by lower ethylene margins.

Capital resources: Capital expenditures for the first quarter of 1996 were $45
million including capitalized interest of $6 million. Capital expenditures for
the first quarter of 1995 were $39 million including capitalized interest of $5
million. The current quarter increase was principally due to development costs
for the Britannia field in the U.K. North Sea.

Financing activities: During the first quarter of 1996, the Company terminated
an undrawn $100 million unsecured credit facility, amended its $450 million
unsecured credit facility and replaced a $100 million unsecured credit facility.
At March 31, 1996, the Company had two unsecured credit facilities (the "Credit
Facilities"). One of the Credit Facilities is a $100 million unsecured credit
agreement with a syndicate of banks that provides for conversion of amounts
outstanding on March 15, 1997 to a one-year term loan maturing March 15, 1998.
This facility replaced a $100 million unsecured credit agreement that matured on
April 15, 1997. Another Credit Facility is a $450 million unsecured credit
agreement with a syndicate of banks that provides for a quarterly reduction of
$35 million beginning June 30, 2000, with a final maturity of March 31, 2001.
This facility is an amendment and restatement of the $450 million unsecured
credit agreement that initially matured on April 30, 1999. The $450 million
facility allows the Company to borrow up to $300 million in U.S. dollar loans at
interest rates determined in a competitive bid process. Loans under the $450
million facility may be made in both pounds sterling and U.S. dollars at the
option of the Company. Loans under the Credit Facilities bear interest at
floating market rates based on, at the Company's option, the agent bank's base
rate or LIBOR, plus applicable margins subject to increase or decrease in
certain events. The Credit Facilities contain restrictive covenants, including
maintenance of certain coverage ratios related to the incurrence of additional
indebtedness and limitations on asset sales and mergers or consolidations. The
covenants also require maintenance of stockholders' equity, as adjusted, at $350
million. Under the terms of the Credit Facilities, the Company may pay dividends
and make stock repurchases provided that such level of minimum stockholders'
equity is maintained and the Company complies with certain other covenants in
the Credit Facilities. At March 31, 1996, the Company's adjusted stockholders'
equity was approximately $543 million. At March 31, 1996, $125 million was
outstanding under the $450 million facility bearing interest at a weighted
average rate of 5.7% per annum.

The Company has established short-term, uncommitted and unsecured lines of
credit with several banks in both U.S. dollars and pounds sterling. These money
market borrowings, which have a short-term maturity, have been classified as
long-term debt based on the Company's intent to refinance these borrowings for a
period exceeding one year and the ability to refinance them on a long-term basis
through its Credit Facilities. At March 31, 1996, $70 million was outstanding
under these money market lines which bore interest at weighted average rates of
6.4% per annum. As of March 31, 1996, the Company had approximately $353 million
of available financing under such lines of credit and the Credit Facilities.

The Company's indirect subsidiary, Union Texas Britannia Limited ("UTBL"), has a
150 million pounds sterling secured financing from a syndicate of banks. The
financing is used to fund the Company's share of the cost of developing the
Britannia field to production. At March 31, 1996, 27 million pounds sterling
($41 million) was outstanding under UTBL's financing which bore interest at a
weighted average rate of 7% per annum.

At March 31, 1996, the Company's  long-term debt balance was $641 million,  down
approximately $130 million from the balance at July 31, 1995 after the $270
million Alba acquisition.

On April 27, 1994, the Company's Board of Directors authorized the repurchase of
up to 2,000,000 shares of the Company's common stock and pursuant thereto, the
Company had repurchased 612,836 shares as of March 31, 1996. The repurchased
stock will be used for general corporate purposes, including fulfilling employee
benefit program obligations. As of March 31, 1996, 205,167 shares of common
stock were held, at cost, as treasury shares.

Financial condition: In the first quarter of 1996, the Company declared and paid
a dividend of approximately $4.4 million on its common stock. On April 18, 1996,
the Company announced a dividend on its common stock of $.05 per share to
stockholders of record as of April 30, 1996, payable on May 15, 1996.

                                       7
<PAGE>   9
In October 1995, the Financial Accounting Standards Board released Statement of
Financial Accounting Standards No. 123, "Accounting for Stock-Based
Compensation," which establishes financial and reporting standards for stock
based employee compensation plans that will be effective for the Company's 1996
financial statements. The statement encourages, but does not require, companies
to adopt a fair value based method of accounting for such plans in place of
current accounting standards. Companies electing to continue to use their
existing accounting methods will be required to make pro forma disclosures of
net income assuming a fair value based method of accounting has been applied.
The Company will continue to use its current accounting methods with additional
disclosures.

The Company may enter into hedging contracts from time to time in order to
minimize the impact of adverse price fluctuations. In the first quarter of 1996,
the Company entered into financial hedging futures contracts to offset a portion
of its North Sea crude. The Company will continue to consider other
opportunities in its risk management activities, such as swaps or fixed price
contracts to mitigate the adverse movement in oil and gas prices. Gains or
losses on these hedging activities are recognized in sales revenues when the
underlying exposed hedged production is sold. As of March 31, 1996, the Company
had open contracts for 474,000 barrels of oil at an average Brent price of
$16.51 per barrel which will be settled by August 1996. During the first quarter
of 1996, the Company settled crude oil hedging contracts of 186,000 barrels at
an average Brent price of $16.95. Additionally, in April 1996, the Company
entered into crude oil swap contracts for 600,000 barrels of oil at an average
Brent price of $17.16 per barrel which will be settled from August through
December 1996.



                                       8

<PAGE>   10
                                   FORM 10-Q
                          PART II - OTHER INFORMATION

ITEM 1 - LEGAL PROCEEDINGS

The Company and its subsidiaries and related companies are named defendants in
numerous lawsuits and named parties in numerous governmental proceedings arising
in the ordinary course of business. While the outcome of lawsuits or other
proceedings against the Company cannot be predicted with certainty, management
does not expect these matters to have a material adverse effect on the financial
statements of the Company. (See Item 3 in the Company's 1995 annual report on
Form 10-K.)


                                       9

<PAGE>   11
ITEM 6 - EXHIBITS AND REPORTS ON FORM 8-K

<TABLE>
<CAPTION>

       (a)   Exhibits

                Exhibit No.         Description
                -----------         -----------
<S>             <C>                 <C>
                10.1                Second Amended and Restated Credit
                                    Agreement dated as of March 29, 1996
                                    among Union Texas Petroleum Holdings,
                                    Inc., the Banks and Co-Agents listed
                                    therein and NationsBank of Texas, N.A.,
                                    as Agent.
     
                10.2                Credit Agreement dated as of March 29,
                                    1996 among Union Texas Petroleum
                                    Holdings, Inc., the Banks and Co-Agents
                                    listed therein and NationsBank of
                                    Texas, N.A., as Agent.
     
                15                  Independent Accountants' Awareness Letter.
     
                27.1                Financial Data Schedule for the
                                    three-month period ended March 31, 1996.

</TABLE>

       (b)   Reports on Form 8-K

             The Company filed the following reports on Form 8-K since the
             quarterly period ended December 31, 1995:

             The Company filed a Form 8-K dated January 30, 1996 to attach press
             releases announcing the 1995 year-end and fourth quarter results,
             the 1996 capital spending budget and to report an agreement to
             acquire an interest in an Australian exploration permit.

             The Company filed a Form 8-K dated February 21, 1996 to attach a
             press release reporting discoveries in Pakistan.

                                       10

<PAGE>   12
                                   SIGNATURE

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

                                      UNION TEXAS PETROLEUM HOLDINGS, INC.

Date:  April 25, 1996                  By: /s/ DONALD M. MCMULLAN
                                       ------------------------------------
                                             Donald M. McMullan
                                          Vice President and Controller
                                             (Chief Accounting Officer
                                          and officer duly authorized to
                                         sign on behalf of the registrant)


                                       11

<PAGE>   13
                                 EXHIBIT INDEX



Exhibit
Number                       Description
- ------                       -----------
 10.1         Second Amended and Restated Credit Agreemeent dated as
              of March 29, 1996 among Union Texas Petroleum Holding, Inc.,
              the Banks and Co-Agents listed therein and NationsBank of
              Texas, N.A., as Agent


 10.2         Credit Agreement dated as of March 29, 1996 among Union
              Texas Petroleum Holdings, Inc., the Banks and Co-Agents
              listed therein and NationsBank of Texas, N.A., as Agent


 15           Independent Accountants' Awareness Letter


 27.1         Financial Data Schedule for the three-month period ended
              March 31, 1996


<PAGE>   1
- --------------------------------------------------------------------------------


                                  $450,000,000


                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                  dated as of

                                 March 29, 1996

                                     among

                      UNION TEXAS PETROLEUM HOLDINGS, INC.

                            The BANKS Listed Herein

                                      and

                           NATIONSBANK OF TEXAS, N.A.
                                    as Agent

                                      and

             BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION
                   UNION BANK OF SWITZERLAND, HOUSTON AGENCY
                                  as Co-Agents


         THE INDEMNIFICATION PROVISIONS OF SECTIONS 7.06 AND 9.03(B) OF THIS
         AGREEMENT INCLUDE INDEMNIFICATION FROM THE CONSEQUENCES OF THE
         NEGLIGENCE OF THE PERSONS INDEMNIFIED THEREBY TO THE EXTENT SET FORTH
         THEREIN


- --------------------------------------------------------------------------------
<PAGE>   2
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                      Page
         <S>            <C>                                                                                            <C>
                                                        ARTICLE I

                                                       DEFINITIONS
         SECTION 1.01.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
         SECTION 1.02.  Accounting Terms and Determinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         SECTION 1.03.  Types of Borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         SECTION 1.04.  Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
         SECTION 1.05.  Unimar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
         SECTION 1.06.  Ratings.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26

                                                        ARTICLE II

                                                       THE CREDITS
         SECTION 2.01.  Commitments to Lend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
         SECTION 2.02.  Notice of Committed Borrowings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
         SECTION 2.03.  Money Market Borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
         SECTION 2.04.  Notice to Banks; Funding of Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         SECTION 2.05.  Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
         SECTION 2.06.  Maturity of Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
         SECTION 2.07.  Interest Rates  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
         SECTION 2.08.  Facility Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         SECTION 2.09.  Optional Termination or Reduction of Commitments  . . . . . . . . . . . . . . . . . . . . . .  39
         SECTION 2.10.  Mandatory Termination or Reduction
                                  of Commitments; Mandatory Prepayments . . . . . . . . . . . . . . . . . . . . . . .  39
         SECTION 2.11.  Optional Prepayments  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
         SECTION 2.12.  General Provisions as to Payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  41
         SECTION 2.13.  Funding Losses  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42
         SECTION 2.14.  Computation of Interest and Fees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42
         SECTION 2.15.  Chapter 15  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
         SECTION 2.16.  Maximum Interest Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
         SECTION 2.17.  Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
         SECTION 2.18.  Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  46
         SECTION 2.19.  Sterling Loans  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47

                                                       ARTICLE III

                                                        CONDITIONS
         SECTION 3.01.  Initial Borrowing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48
         SECTION 3.02.  All Borrowings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49


</TABLE>



                                      -i-
<PAGE>   3
<TABLE>
         <S>            <C>                                                                                            <C>
                                                        ARTICLE IV

                                              REPRESENTATIONS AND WARRANTIES
         SECTION 4.01.  Corporate Existence and Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50
         SECTION 4.02.  Corporate and Governmental
                                  Authorization; Contravention  . . . . . . . . . . . . . . . . . . . . . . . . . . .  50
         SECTION 4.03.  Binding Effect  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50
         SECTION 4.04.  Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  51
         SECTION 4.05.  Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  51
         SECTION 4.06.  Compliance with ERISA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52
         SECTION 4.07.  Environmental Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52
         SECTION 4.08.  Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52
         SECTION 4.09.  Ownership of Restricted Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52
         SECTION 4.10.  Title to Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         SECTION 4.11.  Taxes and Other Obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         SECTION 4.12.  Regulation U  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         SECTION 4.13.  Certain Obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         SECTION 4.14.  United Kingdom Assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54

                                                        ARTICLE V

                                                        COVENANTS
         SECTION 5.01.  Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         SECTION 5.02.  Affirmative Covenants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
         SECTION 5.03.  Primary Business  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
         SECTION 5.04.  Insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
         SECTION 5.05.  Debt  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
         SECTION 5.06.  Restricted Payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
         SECTION 5.07.  Negative Pledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  60
         SECTION 5.08.  Consolidations and Mergers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  61
         SECTION 5.09.  Use of Proceeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  61
         SECTION 5.10.  Addition of Guarantors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  61
         SECTION 5.11.  Restrictions on Dividends, Intercompany
                                  Loans, or Investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62
         SECTION 5.12.  Loans and Advances  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62
         SECTION 5.13.  Cross-Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62
         SECTION 5.14.  Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  63
         SECTION 5.15.  Adjusted Equity and Interest Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . .  63
         SECTION 5.16.  Excluded Subordinated Debt and Preferred Stock  . . . . . . . . . . . . . . . . . . . . . . .  63
         SECTION 5.17.  Certain Obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
         SECTION 5.18.  Restrictions on Asset Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
         SECTION 5.19.  Conversion to Unrestricted Subsidiary . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64

</TABLE>




                                      -ii-
<PAGE>   4
<TABLE>
         <S>            <C>                                                                                            <C>
                                                        ARTICLE VI

                                                         DEFAULTS
         SECTION 6.01.  Events of Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
         SECTION 6.02.  Notice of Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  67

                                                       ARTICLE VII

                                                        THE AGENT
         SECTION 7.01.  Appointment and Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  67
         SECTION 7.02.  Agent and Affiliates  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  67
         SECTION 7.03.  Action by Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  68
         SECTION 7.04.  Consultation with Experts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  68
         SECTION 7.05.  Liability of Agent  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  68
         SECTION 7.06.  Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  68
         SECTION 7.07.  Credit Decision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69
         SECTION 7.08.  Successor Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69
         SECTION 7.09.  Agent's Fees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69

                                                       ARTICLE VIII

                                                 CHANGE IN CIRCUMSTANCES
         SECTION 8.01.  Basis for Determining Interest Rate
                                  Inadequate or Unfair  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69
         SECTION 8.02.  Illegality  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  72
         SECTION 8.03.  Increased Cost and Reduced Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  73
         SECTION 8.04.  Base Rate Loans Substituted for
                                  Affected Fixed Rate Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  75
         SECTION 8.05.  Substitution of Bank  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  75

                                                        ARTICLE IX

                                                      MISCELLANEOUS
         SECTION 9.01.  Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  76
         SECTION 9.02.  No Waivers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  76
         SECTION 9.03.  Expenses; Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  76
         SECTION 9.04.  Sharing of Set-Offs, Etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  78
         SECTION 9.05.  Amendments and Waivers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  78
         SECTION 9.06.  Successors and Assigns  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  78
         SECTION 9.07.  Collateral  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  80
         SECTION 9.08.  Texas Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  80
         SECTION 9.09.  CONSENT TO JURISDICTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  80
         SECTION 9.10.  Counterparts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  81
         SECTION 9.11.  WAIVER OF JURY TRIAL  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  81
         SECTION 9.12.  COMPLETE AGREEMENT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  81


</TABLE>



                                     -iii-
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<TABLE>
         <S>            <C>                                                                                            <C>
         SECTION 9.13.  Liability of Co-Agents and Arranger . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  81
         SECTION 9.14.  Judgment Currency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  81

</TABLE>




Schedule I    - Commitment Reduction Schedule
Schedule II   - Existing Subsidiaries
Schedule III  - Existing Liens
Schedule IV   - Existing Restrictions
Schedule V    - Joint Venture Debt Agreements
Schedule VI   - Outstanding Options
Schedule VII  - Notice Information for Sterling Loans
Schedule VIII - Facility Fees and Applicable Margin
Exhibit A  -  Note
Exhibit B  -  Money Market Quote Request
Exhibit C  -  Invitation for Money Market Quotes
Exhibit D  -  Money Market Quote
Exhibit E  -  Assignment and Assumption Agreement
Exhibit F  -  Opinion of General Counsel of the Company
Exhibit G  -  Opinion of Special Counsel for the Company
Exhibit H  -  Opinion of Special Counsel for the Agent





                                      -iv-
<PAGE>   6
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT


                 Second Amended and Restated Credit Agreement dated as of March
29, 1996 among Union Texas Petroleum Holdings, Inc., the Banks party hereto,
NationsBank of Texas, N.A., as Agent, and Bank of America National Trust and
Savings Association and Union Bank of Switzerland, Houston Agency, as
Co-Agents.

                 The parties hereto agree as follows:

                             PRELIMINARY STATEMENTS

         1.      The Company, the Agent and the co-agents and lenders named
therein previously entered into an Amended and Restated Credit Agreement dated
as of May 13, 1994, as amended by the First Amendment Agreement dated as of
November 21, 1994, the Second Amendment Agreement dated as of January 31, 1995,
the Third Amendment Agreement dated as of April 24, 1995, the Fourth Amendment
Agreement dated as of June 16, 1995, and the Fifth Amendment Agreement dated as
of November 3, 1995 (as so amended, the "1994 Credit Agreement") pursuant to
which the Banks committed to make Loans (as such term is defined in the 1994
Credit Agreement) to the Company on the terms and conditions set forth therein.

         2.      The Company has requested the Banks, the Agent and the
Co-Agents to further amend the 1994 Credit Agreement and, as so further
amended, to restate it in its entirety and the Banks, the Agent and the
Co-Agents have agreed to do so on the terms and conditions set forth herein.

         3.      The parties hereto have agreed to restate the 1994 Credit
Agreement in its entirety for clarity only, and this Second Amended and
Restated Credit Agreement constitutes for all purposes an amendment to the 1994
Credit Agreement and not a new or substitute agreement and each reference to a
Loan herein or in any other document shall include each Loan made heretofore
under the 1994 Credit Agreement as well as each Loan made hereafter under this
Second Amended and Restated Credit Agreement.


                                   ARTICLE I

                                  DEFINITIONS

                 SECTION 1.01.  Definitions.  The following terms, as used
herein, have the following meanings:

                 "Absolute Rate Auction" means a solicitation of Money Market
Quotes setting forth Money Market Absolute Rates pursuant to Section 2.03.





<PAGE>   7
                 "Acceptable Engineer" means DeGolyer & MacNaughton or such
other independent engineering firm that is mutually acceptable to the Agent and
the Company.

                 "Adjusted Equity" means the consolidated stockholders equity
of the Company and its Consolidated Subsidiaries, as determined on a
consolidated basis in accordance with generally accepted accounting principles,
adjusted to exclude (i) any cumulative foreign exchange translation
adjustments, (ii) any non-cash write-up or writedown of any assets of the
Company and its Consolidated Subsidiaries made after March 31, 1995 in
accordance with generally accepted accounting principles, and (iii) the
non-cash effect of the adoption of any change after March 31, 1995 required by
generally accepted accounting principles.

                 "Adjustment Date" means (i) each day on which any principal
payment (including any principal payment effected pursuant to Section 2.04(c))
of any Sterling Loan is required to be made (except pursuant to Section
2.10(e)) or is made, (ii) each day on which any Conversion involving any
Sterling Loan occurs, (iii) the last Sterling Business Day of each month, (iv)
each day on which a Sterling Loan or a Euro-Dollar Loan is made and (v) each
day designated as an Adjustment Date by the Required Banks from time to time
during the continuance of an Event of Default.

                 "Administrative Questionnaire" means, with respect to each
Bank, an administrative questionnaire in the form requested by the Agent
submitted to the Agent (with a copy to the Company) duly completed by such
Bank.

                 "Affiliate" means (i) any Person holding 5% or more of any
class of capital stock of the Company, and (ii) any Person (other than the
Company, a Subsidiary or a Partnership) directly or indirectly controlling,
controlled by or under common control with any Person described in clause (i).
As used in this definition of "Affiliate", the term "control" means the
possession, directly or indirectly, of the power to direct or cause the
direction of the management and policies of a Person, whether through ownership
of voting securities, by contract or otherwise.

                 "Agent" means NationsBank in its capacity as agent for the
Banks hereunder and any successor in such capacity.

                 "Agreement" means this Second Amended and Restated Credit
Agreement dated as of March 29, 1996 among the Company, the Banks, the Agent
and the Co-Agents, as amended from time to time in accordance with the terms
hereof.

                 "Applicable Lending Office" means, with respect to any Bank,
(i) in the case of its Base Rate Loans, its Domestic Lending Office, (ii) in
the case of its Euro-Dollar Loans, its Euro-Dollar Lending Office, (iii) in the
case of its Money Market Loans, its Money Market Lending Office, and (iv) in
the case of its Sterling Loans, its Sterling Lending Office.





                                      -2-
<PAGE>   8
                 "Applicable Margin" means, for any Interest Period for each
Euro-Dollar Loan and for any Interest Period for each Sterling Loan, the rate
per annum applicable to such Committed Loan during such Interest Period, as
shown on Schedule VIII and based on the Rating Level in effect on the first day
of such Interest Period for such Committed Loan.

                 "Arranger" means NationsBanc Capital Markets, Inc.

                 "Asset Sale" means any sale, lease, transfer or other
disposition of any Restricted Asset by the Company or any Restricted
Subsidiary, whether such sale, lease, transfer or other disposition is direct
or indirect (such as by selling capital stock of the Subsidiary that owns such
Restricted Asset, but excluding sales of capital stock of the Company), other
than (i) farm-outs in the ordinary course of business of properties containing
substantially no proved reserves at the time of the farm-out, (ii) sales in the
ordinary course of business of Hydrocarbons after severance, (iii) sales,
transfers, leases or other dispositions of inventory and obsolete or surplus
equipment in the ordinary course of business, and (iv) sales, transfers, leases
or other dispositions to the Company or any Restricted Subsidiary if no Default
then exists or would result therefrom.

                 "Assignee" has the meaning set forth in Section 9.06(c).

                 "Assignment" means an Assignment and Assumption Agreement in
substantially the form of Exhibit E hereto.

                 "Bank" means each bank listed on the signature pages hereof,
each Assignee which becomes a Bank pursuant to Section 9.06(c), and their
respective successors.

                 "Base Rate" means, for any day, a rate per annum equal to the
higher of (i) the Corporate Base Rate for such day and (ii) the sum of 1/2 of
1% plus the Federal Funds Rate for such day.

                 "Base Rate Loan" means a Committed Loan which bears interest
as provided in Section 2.07(a).

                 "Benefit Arrangement" means at any time an employee benefit
plan within the meaning of Section 3(3) of ERISA which is not a Plan or a
Multiemployer Plan and which is maintained or otherwise contributed to by any
member of the ERISA Group.

                 "Borrowing" has the meaning set forth in Section 1.03.

                 "Cash Interest Expense" means, for any period, the sum of (i)
the aggregate amount accrued during such period by the Company and its
Consolidated Subsidiaries for interest determined on a consolidated basis, but
excluding interest on





                                      -3-
<PAGE>   9
Non-Recourse Debt and interest on Debt of Unrestricted Subsidiaries to the
extent such Debt does not constitute Debt of the Company or any Restricted
Subsidiary plus (ii) the aggregate amount paid during such period by the
Company and its Consolidated Subsidiaries for dividends on Restricted Preferred
Stock, determined on a consolidated basis.

                 "Co-Agents" means Bank of America National Trust and Savings
Association and Union Bank of Switzerland, Houston Agency in their capacities
as Co-Agents hereunder.

                 "Commitment" means, with respect to each Bank, the amount set
forth opposite the name of such Bank on the signature pages hereof (or, if such
Bank is an Assignee and its name is not set forth on the signature pages
hereof, the amount of its Commitment as set forth in the Assignment pursuant to
which it became a Bank), as such amount may be reduced from time to time
pursuant to Sections 2.09 and 2.10 or reduced or increased from time to time
pursuant to any Assignment to which it is a party.

                 "Commitment Reduction Date" means each date set forth in
Schedule I (or, if any such date is not a Euro-Dollar Business Day, the next
succeeding Euro-Dollar Business Day unless such Euro-Dollar Business Day falls
in another calendar month, in which case such Commitment Reduction Date shall
be the next preceding Euro-Dollar Business Day).

                 "Committed Loan" means a loan made by a Bank pursuant to
Section 2.01 and refers to a Base Rate Loan, a Euro-Dollar Loan or a Sterling
Loan (each of which shall be a "Type" of Loan).

                 "Company" means Union Texas Petroleum Holdings, Inc., a 
Delaware corporation.

                 "Company's 1995 Form 10-K" means the Company's annual report
on Form 10-K for 1995, as filed with the Securities and Exchange Commission
pursuant to the Securities Exchange Act of 1934.

                 "Consolidated Debt" means, at any date, an amount equal to (a)
the sum (without duplication) of (i) the aggregate amount of Debt (other than
Defeased Debt, Excluded Subordinated Debt not exceeding $100,000,000 and Debt
that would not constitute Debt of the Company or any of its Consolidated
Subsidiaries if clause (viii) were not included in the definition herein of
Debt) of the Company and its Consolidated Subsidiaries, determined on a
consolidated basis as of such date, plus (ii) the Unimar Percentage at such
date of the aggregate Debt (other than Defeased Debt and Debt that would not
constitute Debt of Unimar or any of the Unimar Restricted Subsidiaries if
clause (viii) were not included in the definition herein of Debt) of Unimar and
the Unimar Restricted Subsidiaries, determined on a consolidated basis as of
such date, plus





                                      -4-
<PAGE>   10
(iii) the Excess Letter of Credit/Guarantee Amount at such date, minus (b) the
sum (without duplication and only to the extent that any of the following are
included in the foregoing clause (a)) at such date of (1) Debt of Unrestricted
Subsidiaries to the extent such Debt does not constitute Debt of the Company or
any Restricted Subsidiary plus (2) Non-Restricted Asset Non-Recourse Debt plus
(3) Existing Pakistan Non-Recourse Debt.

                 "Consolidated Subsidiary" means at any date any Subsidiary or
other entity the accounts of which would be consolidated with those of the
Company in its consolidated financial statements as of such date.

                 "Convert," "Conversion" and "Converted" each refers to (i) the
change of Committed Loans of one Type into Committed Loans of another Type
pursuant to Section 2.18 or Article VIII, (ii) the continuation of all
Euro-Dollar Loans or all Sterling Loans, as the case may be, comprising the
same Borrowing as such for an additional Interest Period pursuant to Section
2.18, and (iii) an election to change, pursuant to Section 2.18, the Interest
Period applicable to all Euro-Dollar Loans or all Sterling Loans, as the case
may be, comprising the same Borrowing prior to the end of the Interest Period
then applicable thereto.

                 "Corporate Base Rate" means a fluctuating interest rate per
annum as shall be in effect from time to time equal to the rate of interest
publicly announced by NationsBank as its base rate, whether or not the Company
has notice thereof.  Such rate is set by NationsBank as a general reference
rate of interest, taking into account such factors as NationsBank may deem
appropriate, it being understood that many of NationsBank's commercial or other
loans are priced in relation to such rate, that it is not necessarily the
lowest or best rate actually charged to any customer and that NationsBank may
make various commercial or other loans at rates of interest having no
relationship to such rate.

                 "Current Dollar Amount" means, as to each Sterling Loan, the
Dollar amount thereof based on the then Current Exchange Rate, as determined
from time to time by the Agent, which determinations shall be conclusive in the
absence of manifest error.

                 "Current Exchange Rate" means the arithmetic average of the
respective spot exchange rates determined by each of the Reference Banks (i)
for converting Sterling into Dollars (in an amount substantially equal to the
aggregate outstanding principal amount of the Sterling Loans of such Reference
Bank or L.1,000,000 if no such amount is outstanding) or (ii) in the case of a
Conversion of a Base Rate Loan or a Euro-Dollar Loan into a Sterling Loan, for
converting Dollars into Sterling (in an amount substantially equal to the
aggregate outstanding principal amount of the Base Rate Loans and Euro-Dollar
Loans of such Reference Bank or $1,000,000 if no such amount is outstanding),
in each case in the interbank eurocurrency market where the foreign currency
and exchange operations of such Reference Bank's Sterling Lending





                                      -5-
<PAGE>   11
Office are customarily conducted with respect to Sterling, at 10:00 A.M.
(London time) or as near thereto as practicable on the date that is two
Sterling Business Days prior to the date of determination, as determined by the
Agent in accordance with Section 2.19(a), which determination shall be
conclusive in the absence of manifest error.  The Current Exchange Rate shall
be determined for, and shall take effect on, each Adjustment Date and shall
remain in effect until any subsequent determination of the Current Exchange
Rate.  Any Conversion of a Base Rate Loan or a Euro-Dollar Loan into a Sterling
Loan or of a Sterling Loan into a Base Rate Loan or a Euro-Dollar Loan shall be
made at the Current Exchange Rate in effect on the date of such Conversion.

                 "Debt" of any Person means at any date, without duplication,
(i) all obligations of such Person for borrowed money, (ii) all obligations of
such Person evidenced by bonds, debentures, notes or other similar instruments,
(iii) all obligations of such Person to pay the deferred purchase price of
property or services, except accrued expenses, trade accounts payable and taxes
payable arising in the ordinary course of business, (iv) the present value,
determined in accordance with generally accepted accounting principles, of the
obligations of such Person to make payments under capital leases, (v) all
obligations of such Person which shall have been outstanding for more than five
days owed to a bank or other Person in respect of amounts theretofore paid
under a letter of credit or similar instrument, (vi) all Debt of others secured
by a Lien on any asset owned by such Person whether or not such Debt is assumed
by such Person (except that Joint Venture Debt shall for purposes of this
Agreement be deemed to be Debt of Pertamina and not of the Company or a
Subsidiary), (vii) all Restricted Preferred Stock issued by such Person or as
to which such Person is otherwise liable, (viii) all Debt of others Guaranteed
by such Person, to the extent of such Guarantee, and (ix) all obligations of
such Person which have been outstanding for more than five days to pay any
margin call (or similar requirement) on any Derivative Transaction (excluding,
in the case of the Company and its Subsidiaries, such obligations not exceeding
$5,000,000 in the aggregate); provided that, neither Debt nor Guarantee
includes (a) obligations under leases other than capital leases and under bona
fide Derivative Transactions (except as provided in clause (ix) above) and
obligations with respect to take-or-pay payments theretofore received which
remain subject to cash settlement or make-up; (b) Debt of the Company or a
Subsidiary owing to the Company or a Subsidiary, except for Debt not eliminated
in consolidation pursuant to the proviso in Section 1.02; (c) obligations under
the Indonesian Participating Units; (d) any preferred stock that does not
constitute Restricted Preferred Stock; and (e) the existing agreements relating
to Joint Venture Debt set forth in the contracts described on Schedule V of the
parties thereto as to allocation of responsibility for damages caused by reason
of an act or failure to act by, or otherwise related to, any such party, or any
similar agreement hereafter entered into providing for a similar allocation of
liability in respect of similar actions or failures to act.  The amount of Debt
attributable to any Restricted Preferred Stock shall be the maximum
consideration required to be paid upon the purchase, retirement, redemption,
exchange, or conversion of the portion thereof constituting Debt (such
consideration, if other than cash, to be valued at the fair market value
thereof), provided that, in computing such





                                      -6-
<PAGE>   12
consideration there shall be excluded (A) any consideration payable solely in
common stock of the Company; (B) dividends to the extent such dividends do not
materially exceed the generally prevailing market rate (at the time of issuance
of such Restricted Preferred Stock) on preferred stock of comparable risk and
maturity; and (C) any premium payable upon any such purchase, retirement,
redemption, exchange or conversion only as a result of the exercise by the
issuer of a call provision exercisable only at the option of the issuer, if
failure to exercise such option would not have an adverse effect on the Company
or any Subsidiary pursuant to the terms of any such Restricted Preferred Stock
or any documents related thereto.

                 "Default" means any condition or event which constitutes an
Event of Default or which with the giving of notice or lapse of time or both
would, unless cured or waived, become an Event of Default.

                 "Defeased Debt" means any Debt of the Company or any
Subsidiary (i) which has been defeased in accordance with the terms of the
applicable Debt instruments, (ii) which is deemed to be extinguished under
generally accepted accounting principles applicable to the Company or such
Subsidiary, and (iii) with respect to which the Agent has received a
certificate of an officer of the Company or such Subsidiary to the effect that
the requirements of clauses (i) and (ii) of this definition have been met as to
such Debt and such evidence, if any, in support of such certificate as the
Agent may reasonably request.

                 "Derivative Transactions" means foreign exchange transactions
and commodity, currency and interest rate swaps, floors, caps, collars, forward
sales, options, other similar transactions and combinations of the foregoing.

                 "Dollar" (whether or not capitalized) and "$" mean lawful
money of the United States of America.

                 "Domestic Business Day" means any day except a Saturday,
Sunday or other day on which commercial banks in New York City, San Francisco
or Houston are authorized by law to close.

                 "Domestic Lending Office" means, as to each Bank, its office
located at its address set forth in its Administrative Questionnaire (or
identified in its Administrative Questionnaire as its Domestic Lending Office)
or such other office as such Bank may hereafter designate as its Domestic
Lending Office by notice to the Company and the Agent.

                 "EBITDA" means, for any period, the sum of (i) the
consolidated net income of the Company and its Consolidated Subsidiaries for
such period before non-cash non-recurring items, gains or losses on
dispositions of assets and the cumulative effect of changes in accounting
principles plus (ii) to the extent included in the determination of such
income, the consolidated charges for such period for interest,





                                      -7-
<PAGE>   13
depreciation, depletion and amortization plus (or, if there is a benefit from
income taxes, minus) (iii) to the extent included in the determination of such
income, the amount of the provision for or benefit from income taxes; provided
that in determining such consolidated net income, such consolidated charges and
such provision for or benefit from income taxes, there shall be excluded
therefrom (to the extent otherwise included therein) (a) the net income (or
loss) of, charges for interest, depreciation, depletion and amortization of,
and such provision for or benefit from income taxes of, any Person acquired by
the Company or a Subsidiary in a pooling-of-interest transaction for any period
prior to the date of such transaction, and (b) the net income (but not loss)
of, charges for interest, depreciation, depletion and amortization of, and such
provision for (but not benefit from) income taxes of, any Person which is
subject to any contractual restriction which prevents the payment of dividends
or the making of distributions on the capital stock or other ownership
interests of such Person to the extent of such contractual restrictions.

                 "Engineering Report" means a report of an Acceptable Engineer
providing an estimate of the proved reserves of Hydrocarbons attributable to
the properties of the Company and the Restricted Subsidiaries.

                 "Environmental Laws" means any and all federal, state, local
and foreign statutes, laws, regulations, ordinances, rules, judgments, orders,
decrees, permits, concessions, grants, franchises, licenses, agreements or
other governmental restrictions relating to the environment or to 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, including, without limitation, the Comprehensive
Environmental Response, Compensation, and Liability Act, the Resource
Conservation and Recovery Act, the Oil Pollution Act, and their state analogs,
in each case as they have been or may be amended.

                 "ERISA" means the Employee Retirement Income Security Act of
1974, as amended, or any successor statute.

                 "ERISA Group" means the Company and all members of a
controlled group of corporations and all trades or businesses (whether or not
incorporated) under common control which, together with the Company, are
treated as a single employer under Section 414 of the Internal Revenue Code.





                                      -8-
<PAGE>   14
                 "Euro-Dollar Business Day" means any Domestic Business Day on
which commercial banks are open for international business (including dealings
in dollar deposits) in London.

                 "Euro-Dollar Lending Office" means, as to each Bank, its
office, branch or affiliate located at its address set forth in its
Administrative Questionnaire (or identified in its Administrative Questionnaire
as its Euro-Dollar Lending Office) or such other office, branch or affiliate
of such Bank as it may hereafter designate as its Euro-Dollar Lending Office
by notice to the Company and the Agent.

                 "Euro-Dollar Loan" means a Committed Loan which bears interest
as provided in Section 2.07(b) or Section 2.07(d).

                 "Event of Default" has the meaning set forth in Section 6.01.

                 "Excess Letter of Credit/Guarantee Amount" means, at any date,
the excess of (a) the sum of (i) the aggregate undrawn amount, at such date, of
all letters of credit as to which the Company or any Restricted Subsidiary
(other than Unimar and the Unimar Restricted Subsidiaries) is the account party
or in respect of which the Company or any Restricted Subsidiary (other than
Unimar and the Unimar Restricted Subsidiaries) has Guaranteed payment plus the
unpaid drawn portions, at such date, of all such letters of credit to the
extent such drawn portions do not constitute Debt of the Company or a
Restricted Subsidiary (other than Unimar and the Unimar Restricted
Subsidiaries), plus (ii) the Unimar Percentage of the aggregate undrawn amount,
at such date, of all letters of credit as to which Unimar or any of the Unimar
Restricted Subsidiaries is the account party or in respect of which Unimar or
any of the Unimar Restricted Subsidiaries has Guaranteed payment plus the
unpaid drawn portions, at such date, of such letters of credit to the extent
such drawn portions do not constitute Debt of Unimar or any of the Unimar
Restricted Subsidiaries, plus (iii) Debt that constitutes Debt of the Company
or any Restricted Subsidiary (other than Unimar or any Unimar Restricted
Subsidiary) pursuant to clause (viii) of the definition herein of Debt, plus
(iv) the Unimar Percentage at such date of Debt that constitutes Debt of Unimar
or any of the Unimar Restricted Subsidiaries pursuant to clause (viii) of the
definition herein of Debt, over (b) $50,000,000.

                 "Excess Net Sales Proceeds" means

         (i)     with respect to any Asset Sale involving, directly or
                 indirectly, a UK Asset (a "UK Asset Sale"),

                 (a)      if, after giving effect to such Asset Sale, the
                          aggregate Net Sales Proceeds from all UK Asset Sales
                          since December 31, 1993 would be less than or equal
                          to $50,000,000 and the aggregate Net





                                      -9-
<PAGE>   15
                          Sales Proceeds from all Asset Sales since such date
                          would be less than or equal to $100,000,000, zero; or

                 (b)      if, after giving effect to such Asset Sale, the
                          aggregate Net Sales Proceeds from all UK Asset Sales
                          since December 31, 1993 ("UK Aggregate Amount") would
                          be greater than $50,000,000 or the aggregate Net
                          Sales Proceeds from all Asset Sales since such date
                          ("Total Aggregate Amount") would be greater than
                          $100,000,000, the lesser of (1) the greater of the
                          amount by which the UK Aggregate Amount exceeds
                          $50,000,000 or the amount by which the Total
                          Aggregate Amount exceeds $100,000,000 or (2) the Net
                          Sales Proceeds from such Asset Sale; and

         (ii)    with respect to any Asset Sale not involving, directly or
                 indirectly, a UK Asset,

                 (a)      if, after giving effect to such Asset Sale, the
                          aggregate Net Sales Proceeds from all Asset Sales
                          since December 31, 1993 would be less than or equal
                          to $100,000,000, zero; or

                 (b)      if, after giving effect to such Asset Sale, the
                          aggregate Net Sales Proceeds from all Asset Sales
                          since December 31, 1993 would be greater than
                          $100,000,000, the lesser of (1) the amount by which
                          such aggregate Net Sales Proceeds exceeds
                          $100,000,000 or (2) the Net Sales Proceeds from such
                          Asset Sale.

                 "Excluded Subordinated Debt" means Debt that (i) is
subordinate and junior, on terms reasonably satisfactory to the Agent, to the
Loans in all respects and (ii) has no requirement, absent a default under such
Debt, that any principal thereof be paid, purchased, redeemed, defeased,
acquired, exchanged or converted (other than exchange for or conversion to
common stock of the Company) prior to March 31, 2002.

                 "Existing Pakistan Non-Recourse Debt" means the Debt, not
exceeding the principal amount of $9,500,000, evidenced by that certain
promissory note dated December 20, 1988, issued by UT Pakistan in the original
principal amount of $21,250,000, the related Finance Agreement between UT
Pakistan and the Overseas Private Investment Corporation ("OPIC") and the
related Issuing and Paying Agency Agreement among Morgan Guaranty Trust Company
of New York as issuing and paying agent, OPIC and UT Pakistan.

                 "Fair Market Value" means with respect to any asset of the
Company or any Subsidiary at any date the open market cash purchase price that
an informed and willing purchaser would pay for such asset in an arm's length
transaction to a willing





                                      -10-
<PAGE>   16
and informed owner under no compulsion to sell, all as reasonably determined in
good faith by the Company.

                 "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 Domestic
Business Day next succeeding such day, provided that (i) if such day is not a
Domestic Business Day, the Federal Funds Rate for such day shall be such rate
on such transactions on the next preceding Domestic Business Day, as so
published on the next succeeding Domestic Business Day, and (ii) if no such
rate is so published on such next succeeding Domestic Business Day, the Federal
Funds Rate for such day shall be the average rate quoted to NationsBank on such
day on such transactions as determined by the Agent.

                 "Financing Documents" means this Agreement and the Notes.

                 "Fixed Rate Loans" means Sterling Loans, Euro-Dollar Loans or
Money Market Loans (excluding Money Market LIBOR Loans bearing interest
pursuant to Section 8.01(a)) or any combination of the foregoing.

                 "Guarantee" by any Person means any obligation, contingent or
otherwise (including, without limitation, any obligation to repay to a payor or
creditor of a payor amounts previously paid to such Person by such payor), of
such Person directly or indirectly guaranteeing any Debt of any other Person or
otherwise incurred for the purpose of assuring the holder of payment of any
such Debt; provided that (i) the obligations of any Person in respect of Debt
of any Partnership in which such Person is a general partner shall not
constitute a Guarantee of such Debt so long as substantially all assets of such
Person are comprised of its Investment in such Partnership, (ii) the obligation
of a Person to transfer or restore cash to the account of a Partnership,
Subsidiary or Affiliate pursuant to periodic settlements or adjustments under
cash management practices of such Persons shall not constitute a Guarantee,
(iii) the contractual obligation of a Person to assure that a Subsidiary,
Partnership or Affiliate conducts its operations as a prudent operator shall
not constitute a Guarantee of indebtedness of the Subsidiary, Partnership or
Affiliate, (iv) the obligation of a Person to cause net amounts of cash owned
by a Subsidiary, Partnership or Affiliate to be applied to payment of
indebtedness of such Subsidiary, Partnership or Affiliate shall not constitute
a Guarantee of such indebtedness and (v) the reaffirmation to or for the
benefit of a lender of contractual obligations (as, for example, those set
forth in the Production Sharing Contracts) previously entered into in good
faith and not in contemplation of the incurrence of Debt shall not constitute a
Guarantee so long as the other arrangements entered into in connection with
such reaffirmation do not increase the likelihood that additional funds will be
required to meet such obligations (as would





                                      -11-
<PAGE>   17
be the case, for example, if revenues otherwise available to meet such
obligations were dedicated to such lender).

                 "HPG Plant" means the five-twelfths interest in the Geismar,
Louisiana olefins plant owned by UTPC and its subsidiaries, the supply and
distribution assets related to such plant and all other operating assets of
UTPC and its subsidiaries as of December 31, 1993.

                 "Hydrocarbons" means crude oil, including all kinds of
hydrocarbons and bitumens in solid or liquid form, and natural gas, including
all gaseous hydrocarbons produced from wells, and liquefied natural gas and
liquefied petroleum gases.

                 "Indonesian Participating Units" means the Indonesian
Participating Units issued by Unimar pursuant to the Indenture dated as of
September 24, 1984 between Unimar and Irving Trust Company, Trustee, as amended
and in effect on May 13, 1994, and as thereafter amended to the extent such
subsequent amendments do not change the term thereof, provide additional
security therefor, or increase the payments to be made to holders thereof.

                 "Interest Period" means:  (1) with respect to each Euro-Dollar
Loan comprising part of the same Borrowing, the period commencing on the date
of such Loan or the date of the Conversion of any Committed Loan into such
Euro-Dollar Loan and ending on the last day of the period selected by the
Company pursuant to the provisions below and, thereafter, each subsequent
period commencing on the last day of the immediately preceding Interest Period
(or on any other date selected by the Company pursuant to Section 2.18) and
ending on the last day of the period selected by the Company pursuant to the
provisions below and Section 2.18.  The duration of each such Interest Period
shall be 1, 2, 3 or 6 months or (subject to Section 2.02(b)) 9 or 12 months, in
each case as the Company may, upon notice received by the Agent not later than
10:00 A.M. (Houston time) on the third Euro-Dollar Business Day prior to the
first day of such Interest Period, select; provided that:

                 (a)      any Interest Period which would otherwise end on a
         day which is not a Euro-Dollar Business Day shall be extended to the
         next succeeding Euro-Dollar Business Day unless such Euro-Dollar
         Business Day falls in another calendar month, in which case such
         Interest Period shall end on the next preceding Euro-Dollar Business
         Day;

                 (b)      any Interest Period which begins on the last
         Euro-Dollar Business Day of a calendar month (or on a day for which
         there is no numerically corresponding day in the calendar month at the
         end of such Interest Period) shall, subject to clause (c) below, end
         on the last Euro-Dollar Business Day of a calendar month;





                                      -12-
<PAGE>   18
                 (c)      if any Interest Period includes a date on which a
         payment of principal of the Loans is required to be made under Section
         2.10(c) but does not end on such date, then (i) the principal amount
         (if any) of each Euro-Dollar Loan required to be repaid on such date
         shall have an Interest Period ending on such date and (ii) the
         remainder (if any) of each such Euro-Dollar Loan shall have an
         Interest Period determined as set forth above; and

                 (d)      Interest Periods for all Loans comprising the same
         Borrowing shall commence on the same date and shall be of the same
         duration.

(2) with respect to each Money Market LIBOR Borrowing, the period commencing on
the date of such Borrowing and ending such whole number of months thereafter as
the Company may elect in accordance with Section 2.03; provided that:

                 (a)      any Interest Period which would otherwise end on a
         day which is not a Euro-Dollar Business Day shall be extended to the
         next succeeding Euro-Dollar Business Day unless such Euro-Dollar
         Business Day falls in another calendar month, in which case such
         Interest Period shall end on the next preceding Euro-Dollar Business
         Day;

                 (b)      any Interest Period which begins on the last
         Euro-Dollar Business Day of a calendar month (or on a day for which
         there is no numerically corresponding day in the calendar month at the
         end of such Interest Period) shall, subject to clause (d) below, end
         on the last Euro-Dollar Business Day of a calendar month;

                 (c)      no Interest Period for any Money Market Loan shall
         end after any Commitment Reduction Date if, after giving effect
         thereto, the aggregate principal amount of Loans having Interest
         Periods ending after such date would exceed the aggregate amount of
         the Commitments after giving effect to any scheduled reduction of the
         Commitments on or prior to such date; and

                 (d)      any Interest Period which would otherwise end after
         the Termination Date shall end on the Termination Date.

(3) with respect to each Money Market Absolute Rate Borrowing, the period
commencing on the date of such Borrowing and ending such number of days
thereafter (but not less than 14 days) as the Company may elect in accordance
with Section 2.03; provided that:





                                      -13-
<PAGE>   19
                 (a)      any Interest Period which would otherwise end on a
         day which is not a Euro-Dollar Business Day shall be extended to the
         next succeeding Euro-Dollar Business Day;

                 (b)      no Interest Period for any Money Market Loan shall
         end after any Commitment Reduction Date if, after giving effect
         thereto, the aggregate principal amount of Loans having Interest
         Periods ending after such date would exceed the aggregate amount of
         the Commitments after giving effect to any scheduled reduction of the
         Commitments on or prior to such date; and

                 (c)      any Interest Period which would otherwise end after
         the Termination Date shall end on the Termination Date.

(4)      with respect to each Sterling Loan comprising part of the same
Borrowing, the period commencing on the date of such Loan or the date of the
Conversion of any Committed Loan into such Sterling Loan and ending on the last
day of the period selected by the Company pursuant to the provisions below and,
thereafter, each subsequent period commencing on the last day of the
immediately preceding Interest Period (or on any other date selected by the
Company pursuant to Section 2.18) and ending on the last day of the period
selected by the Company pursuant to the provisions below and Section 2.18.  The
duration of each such Interest Period shall be 1, 2, 3 or 6 months, in each
case as the Company may, upon notice received by the Agent not later than 10:00
A.M. (Houston time) on the third Sterling Business Day prior to the first day
of such Interest Period, select; provided that:

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

                 (b)      any Interest Period which begins on the last Sterling
         Business Day of a calendar month (or on a day for which there is no
         numerically corresponding day in the calendar month at the end of such
         Interest Period) shall, subject to clause (c) below, end on the last
         Sterling Business Day of a calendar month;

                 (c)      if any Interest Period includes a date on which a
         payment of principal of the Loans is required to be made under Section
         2.10(c) but does not end on such date, then (i) the principal amount
         (if any) of each Sterling Loan required to be repaid on such date
         shall have an Interest Period ending on such date and (ii) the
         remainder (if any) of





                                      -14-
<PAGE>   20
         each such Sterling Loan shall have an Interest Period determined as 
         set forth above; and

                 (d)      Interest Periods for all Loans comprising the same
         Borrowing shall commence on the same date and shall be of the same
         duration.

                 "Internal Revenue Code" means the Internal Revenue Code of
1986, as amended, or any successor statute.

                 "Investment" means any investment in any Person, whether by
means of share purchase, capital contribution, loan, advance, Guarantee or
otherwise.  It is understood that a joint operating agreement or similar
arrangement with respect to Hydrocarbon properties or the HPG Plant does not
constitute a Person and hence that payments in respect of the acquisition or
maintenance of an interest in such Hydrocarbon properties or the HPG Plant do
not constitute an Investment.

                 "Invitation for Money Market Quotes" has the meaning set forth
in Section 2.03(c).

                 "Joint Venture Debt" means obligations secured by a Lien on
the interests of the Company or a Subsidiary, as the case may be, arising under
either of the Production Sharing Contracts or any related supply contracts, if
such Lien covers ratably the interests of Pertamina and all production sharing
contractors thereunder.

                 "LIBOR Auction" means a solicitation of Money Market Quotes
setting forth Money Market Margins based on the London Interbank Offered Rate
pursuant to Section 2.03.

                 "Lien" means, with respect to any asset, any mortgage, lien,
pledge, charge, security interest or encumbrance of any kind in respect of such
asset (including, without limitation, any production payment, advance payment
or similar arrangement with respect to minerals in place), whether or not
filed, recorded or otherwise perfected under applicable law.  For the purposes
of this Agreement, the Company or any Subsidiary shall be deemed to own subject
to a Lien any asset which it has acquired or holds subject to the interest of a
vendor or lessor under any conditional sale agreement, capital lease or other
title retention agreement relating to such asset.  The right of set-off,
whether by operation of law or by contract, does not constitute a Lien unless
there is a related obligation to maintain a deposit of cash or other assets in
respect of which such right of set-off may be exercised.

                 "Loan" means a Committed Loan or a Money Market Loan and
"Loans" means Committed Loans or Money Market Loans or any combination of the
foregoing.





                                      -15-
<PAGE>   21
                 "London Interbank Offered Rate" has the meaning set forth in 
Section 2.07(b).

                 "material" means, with respect to any matter so characterized
herein, that such matter would reasonably be expected to be significant to a
Bank in determining whether to enter into this Agreement or to extend credit
hereunder.

                 "Material Debt" means Debt of the Company and/or any one or
more Restricted Subsidiaries (other than Non-Recourse Debt) in an aggregate
principal amount equal to or greater than $15,000,000, whether incurred under
one or more related or unrelated documents or instruments.

                 "Material Plan" means at any time a Plan or Plans having
aggregate Unfunded Liabilities in excess of $15,000,000.

                 "Moody's" means Moody's Investors Service, Inc. or any
successor to its debt ratings business.

                 "Money Market Absolute Rate" has the meaning set forth in
Section 2.03(d).

                 "Money Market Absolute Rate Loan" means a loan to be made by a
Bank pursuant to an Absolute Rate Auction.

                 "Money Market Lending Office" means, as to each Bank, its
Domestic Lending Office or such other office, branch or affiliate of such Bank
as it may hereafter designate as its Money Market Lending Office by notice to
the Company and the Agent; provided that any Bank may from time to time by
notice to the Company and the Agent designate separate Money Market Lending
Offices for its Money Market LIBOR Loans, on the one hand, and its Money Market
Absolute Rate Loans, on the other hand, in which case all references herein to
the Money Market Lending Office of such Bank shall be deemed to refer to either
or both of such offices, as the context may require.

                 "Money Market LIBOR Loan" means a loan to be made by a Bank
pursuant to a LIBOR Auction (including such a loan bearing interest pursuant to
Section 8.01(a)).

                 "Money Market Loan" means a Money Market LIBOR Loan or a Money
Market Absolute Rate Loan.

                 "Money Market Margin" has the meaning set forth in Section
2.03(d).





                                      -16-
<PAGE>   22
                 "Money Market Quote" means an offer by a Bank to make a Money
Market Loan in accordance with Section 2.03.

                 "Money Market Quote Request" has the meaning set forth in
Section 2.03(a).

                 "Multiemployer Plan" means at any time an employee pension
benefit plan within the meaning of Section 4001(a)(3) of ERISA to which any
member of the ERISA Group is then making or accruing an obligation to make
contributions or has within the preceding five plan years made contributions,
including for these purposes any Person which ceased to be a member of the
ERISA Group during such five year period.

                 "NationsBank" means NationsBank of Texas, N.A., a national 
banking association.

                 "Net Sales Proceeds" means, with respect to any Asset Sale,
the Fair Market Value of the Restricted Asset that is sold, leased, transferred
or otherwise disposed of in such Asset Sale, minus the sum of (i) all
reasonable fees, commissions and expenses incurred by the Company or any
Subsidiary as a result of or in connection with such Asset Sale and (ii) all
taxes required to be paid by the Company or any Subsidiary as a result of such
Asset Sale.

                 "1994 Credit Agreement" has the meaning set forth in the
preliminary statements set forth before this Section 1.01.

                 "Non-Recourse Debt" means, at any date, (a) the aggregate
amount at such date of Debt of the Company or a Subsidiary (other than Unimar
and each Unimar Subsidiary) and (b) the Unimar Percentage of the aggregate
amount at such date of all Debt of each of Unimar and each Unimar Subsidiary,
in respect of which in the case of either (a) or (b) (i) the recourse of the
holder of such Debt, whether direct or indirect and whether contingent or
otherwise, shall be effectively limited to Non-Restricted Assets (or, in the
case of the Existing Pakistan Non-Recourse Debt, the assets described in
Schedule III) and (ii) in the case of any such Debt incurred after the date of
this Agreement, the Company shall have, at or prior to the time of incurrence
thereof, notified the Agent of such incurrence and delivered to the Agent a
certificate of an officer of the Company certifying that such Debt constitutes
Non-Recourse Debt (or that such Debt will be converted into Non-Recourse Debt
at some specified time or upon the occurrence of some specified event),
provided that, if any such Debt is secured by any interest in a license,
concession, production sharing contract or other right and any of the
Restricted Assets consists of an interest in such license, concession,
production sharing contract or other right, then the agreements evidencing such
Debt must provide that default under such Debt will not impair or affect such
license, concession,





                                      -17-
<PAGE>   23
production sharing contract or other right.  In the case of any Non-Recourse
Debt incurred after the date of this Agreement, such limitation on recourse (i)
must be set forth in the instrument evidencing such Debt, and (ii) must be on
terms acceptable to the Agent as evidenced by the written approval thereof by
the Agent (which approval will not be unreasonably withheld, and in deciding
whether to approve such terms the Agent will, if requested by the Company, take
into account what terms are usual and customary in non-recourse financings) and
in any event must provide that the holder of such Debt waives, to the extent
such holder may effectively do so, such holder's right to elect recourse
treatment under 11 U.S.C. Section  1111(b) unless such holder obtains the prior
written consent of the Required Banks.  For avoidance of doubt, (a) if any such
Debt is Guaranteed by the Company or a Restricted Subsidiary in a limited
amount, the excess over such amount (but only the excess) constitutes
Non-Recourse Debt, and (b) Debt shall not be determined to not be Non-Recourse
Debt solely as a result of the existence of either of the following: (i) an
agreement by a direct or indirect parent corporation to repay to a subsidiary
amounts received by such parent corporation from such subsidiary in the event
such subsidiary has a need for such amounts in future periods or (ii) an
agreement by a direct or indirect parent corporation to cause a subsidiary to
comply with such subsidiary's contractual obligations so long as the parent
corporation is not obligated to contribute funds to the subsidiary to enable it
to comply with such contractual obligations and has not otherwise Guaranteed
such obligations.

                 "Non-Restricted Asset Non-Recourse Debt" means, at any date,
the aggregate amount at such date of Non-Recourse Debt as to which the
recourse of the holder is limited exclusively to Non-Restricted Assets as
contemplated by clause (i) of the first sentence of the definition of
Non-Recourse Debt.

                 "Non-Restricted Assets" means all assets of the Company and
its Subsidiaries other than Restricted Assets.

                 "Non-UK Asset" means any Restricted Asset other than a UK
Asset.

                 "Notes" means promissory notes of the Company, substantially
in the form of Exhibit A hereto, evidencing the obligation of the Company to
repay the Loans made to it, and "Note" means any one of such promissory notes
issued hereunder.

                 "Notice of Borrowing" means a Notice of Committed Borrowing
(as defined in Section 2.02) or a Notice of Money Market Borrowing (as defined
in Section 2.03(f)).

                 "Obligation Currency" has the meaning set forth in Section
9.14.

                 "Operating Cash Flow" means, with respect to any period, an
amount equal to





                                      -18-
<PAGE>   24
                 (i) the "net cash (required) provided by operating activities
                 before changes in other assets and liabilities" of the Company
                 and its Consolidated Subsidiaries for such period, that should
                 be reflected in the consolidated statement of cash flows of
                 the Company and its Consolidated Subsidiaries for such period
                 prepared in accordance with generally accepted accounting
                 principles on substantially the same basis as the consolidated
                 statement of cash flows of the Company and its Consolidated
                 Subsidiaries for the year ended December 31, 1995 as set forth
                 in the Company's 1995 Form 10-K, provided that in determining
                 such "net cash (required) provided by operating activities
                 before changes in other assets and liabilities" there shall be
                 excluded therefrom (to the extent otherwise included therein)
                 (a) the portion of such net cash provided by assets securing
                 any Non-Recourse Debt other than the Existing Pakistan
                 Non-Recourse Debt, (b) the net cash provided or required by
                 operating activities before changes in other assets and
                 liabilities of any Person acquired by the Company or a
                 Subsidiary in a pooling-of-interest transaction for any period
                 prior to the date of such transaction, and (c) the net cash
                 provided by operating activities before changes in other
                 assets and liabilities of any Person which is subject to any
                 contractual restriction which prevents the payment of
                 dividends or the making of distributions on the capital stock
                 or other ownership interests of such Person to the extent of
                 such contractual restrictions,

                 plus (ii) to the extent included in the determination of the
                 "net cash (required) provided by operating activities before
                 changes in other assets and liabilities" for such period in
                 accordance with the foregoing clause (i), exploration expenses
                 incurred by the Company or any Consolidated Subsidiary during
                 such period other than (a) exploration expenses incurred in
                 connection with assets securing any Non-Recourse Debt other
                 than the Existing Pakistan Non-Recourse Debt, (b) the
                 exploration expenses of any Person acquired by the Company or
                 a Subsidiary in a pooling-of-interest transaction for any
                 period prior to the date of such transaction, and (c) the
                 exploration expenses of any Person which is subject to any
                 contractual restriction which prevents the payment of
                 dividends or the making of distributions on the capital stock
                 or other ownership interests of such Person to the extent of
                 such contractual restrictions,

                 plus (or, if cash is required by equity investee, minus) (iii)
                 the amount of the "cash (required) provided by equity
                 investee" of the Company and its Consolidated Subsidiaries for
                 such period, that should be reflected in the consolidated
                 statement of cash flows of the Company and its Consolidated
                 Subsidiaries for such period prepared in accordance with





                                      -19-
<PAGE>   25
                 generally accepted accounting principles on substantially the
                 same basis as the consolidated statement of cash flows of the
                 Company and its Consolidated Subsidiaries for the year ended
                 December 31, 1995 as set forth in the Company's 1995 Form
                 10-K, excluding the effect of any cash required by such equity
                 investee for the payment of the principal of its Debt and any
                 cash provided by such equity investee from incurrence of its
                 Debt,

                 minus (iv) dividends on preferred stock paid during such
                 period by the Company or any Consolidated Subsidiary,
                 determined on a consolidated basis.

                 "Parent" means, with respect to any Bank, any Person
controlling such Bank.

                 "Participant" has the meaning set forth in Section 9.06(b).

                 "Partnership" means any general or limited partnership which
is accounted for on the equity method in the Company's consolidated financial
statements and in which the Company or a Subsidiary is a general partner.

                 "PBGC" means the Pension Benefit Guaranty Corporation or any
entity succeeding to any or all of its functions under ERISA.

                 "Permitted Excess" has the meaning set forth in Section
2.19(c).

                 "Person" means an individual, a corporation, a partnership, an
association, a trust or any other entity or organization, including a
government or political subdivision or an agency or instrumentality thereof.
It is understood that a joint operating agreement or similar arrangement with
respect to Hydrocarbon properties or the HPG Plant does not constitute a
Person.

                 "Plan" means at any time an employee pension benefit plan
(other than a Multiemployer Plan) which is covered by Title IV of ERISA or
subject to the minimum funding standards under Section 412 of the Internal
Revenue Code and either (i) is maintained, or contributed to, by any member of
the ERISA Group for employees of any member of the ERISA Group or (ii) has at
any time within the preceding five years been maintained, or contributed to, by
any Person which was at such time a member of the ERISA Group for employees of
any Person which was at such time a member of the ERISA Group.

                 "Production Sharing Contracts" means the production sharing
contracts pertaining to certain operations in Indonesia filed as Exhibits
10.102 and 10.103 to the





                                      -20-
<PAGE>   26
Company's quarterly report on Form 10-Q for the quarter ending June 30, 1990,
as filed with the Securities and Exchange Commission pursuant to the Securities
Exchange Act of 1934.

                 "Rating Level" means the applicable category of rating level
contained in Schedule VIII (subject, however, to the footnotes on Schedule
VIII), based on the ratings of the senior unsecured long-term debt of the
Company by S&P or Moody's or both.

                 "Reference Banks" means the principal London offices of
NationsBank, Bank of America National Trust and Savings Association and Union
Bank of Switzerland and such substitute Bank or Banks as may be mutually agreed
to by the Company and the Agent, and "Reference Bank" means any one of such
Reference Banks.

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

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

                 "Required Banks" means at any time Banks having at least 51%
of the aggregate amount of the Commitments or, if the Commitments shall have
been terminated, holding Notes evidencing at least 51% of the aggregate unpaid
principal amount of the Loans (in the case of Sterling Loans, based on the
Current Dollar Amount thereof in effect as of such time).

                 "Restricted Assets" means (1) all proved reserves of the
Company and the Subsidiaries as of December 31, 1993 in Indonesia, the United
Kingdom (including the United Kingdom Sector of the North Sea) and Pakistan,
(2) all licenses, concessions, production sharing contracts and other rights
pertaining to any such proved reserves (excluding the portion thereof that does
not pertain to any of such proved reserves, if such portion can be severed
without material adverse consequences on the portion pertaining to such proved
reserves), (3) equipment used in the production of any such proved reserves or
in the transportation of production from any such proved reserves if such
equipment is a fixture or otherwise attached to realty, constitutes all or a
part of any pipeline or related equipment, is all or part of a production
platform or related equipment or is equipment similar to any of the foregoing
or used for a similar purpose, and (4) the HPG Plant.

                 "Restricted Payment" means (i) any dividend or other
distribution on any shares of the Company's capital stock (except dividends
payable solely in shares of its common stock), or (ii) any payment on account
of the purchase, redemption, retirement





                                      -21-
<PAGE>   27
or acquisition of (a) any shares of the Company's capital stock or (b) any
option, warrant or other right to acquire shares of the Company's capital stock
(except any such payment made solely in shares of its common stock); provided
that payments of stock-related and other employee benefits (including purchases
by the Company of its common stock in connection with the payment of such
benefits) in the ordinary course of business to employees of the Company or a
Subsidiary shall not be deemed Restricted Payments.

                 "Restricted Preferred Stock" means (i) all preferred stock
which (a) is subject to purchase, retirement, redemption, exchange or
conversion (other than exchange for or conversion to common stock of the
Company), in whole or in part under any circumstance whatsoever (other than
purchase, retirement, redemption, exchange or conversion by the issuer thereof,
at the sole option of such issuer, if failure to exercise such option would not
have an adverse effect on the Company or any Subsidiary pursuant to the terms
of any such preferred stock or any documents related thereto) and (b) provides
for dividends materially in excess of the generally prevailing market dividend
rate (at the time of issuance of such preferred stock) for preferred stock of
comparable risk and maturity, and (ii) the portion of all other preferred stock
which is subject to purchase, retirement, redemption, exchange or conversion
(other than exchange for or conversion to common stock of the Company) at any
date or dates on or prior to March 31, 2002 under any circumstance whatsoever
(other than purchase, retirement, redemption, exchange or conversion by the
issuer thereof, at the sole option of such issuer, if failure to exercise such
option would not have an adverse effect on the Company or any Subsidiary
pursuant to the terms of any such preferred stock or any documents related
thereto).  For avoidance of doubt, to the extent that any shares of Restricted
Preferred Stock are exchanged for or converted to common stock of the Company
and as a consequence such shares of Restricted Preferred Stock are cancelled,
such shares shall no longer constitute Restricted Preferred Stock.

                 "Restricted Subsidiaries Recourse Debt" means, at any date,
the sum of (a) the aggregate amount of all Debt (other than (i) Non-Recourse
Debt, (ii) any Guarantee of Debt of the Company (including the Loans) and (iii)
the amount, if any, by which the Guarantees of the Restricted Subsidiaries
(other than Unimar and the Unimar Restricted Subsidiaries) included in the
determination of Excess Letter of Credit/Guarantee Amount exceeds the Excess
Letter of Credit/Guarantee Amount) of each Restricted Subsidiary (other than
Unimar and the Unimar Restricted Subsidiaries), determined on a consolidated
basis as of such date, and (b) the Unimar Percentage of the aggregate amount of
all Debt (other than (i) Non-Recourse Debt, (ii) any Guarantee of Debt of the
Company and (iii) the amount, if any, by which the Unimar Percentage of the
Guarantees of Unimar and the Unimar Restricted Subsidiaries included in the
determination of Excess Letter of Credit/Guarantee Amount exceeds the Excess
Letter of Credit/Guarantee Amount) of Unimar and the Unimar Restricted
Subsidiaries, determined on a consolidated basis as of such date.





                                      -22-
<PAGE>   28
                 "Restricted Subsidiary" means each Person listed in Part B of
Schedule II hereto and each Subsidiary that owns directly or indirectly any
interest in any Restricted Assets or any Restricted Subsidiary; provided that a
Restricted Subsidiary shall cease to be such at such time as it is converted to
an Unrestricted Subsidiary pursuant to Section 5.19 or ceases to be a
Subsidiary as a result of a transaction permitted by Section 5.14.

                 "Restricted Transfer" means (i) any Investment in an
Affiliate, any Unrestricted Subsidiary or any subsidiary of an Unrestricted
Subsidiary, but excluding to the extent otherwise included in the foregoing,
Investments in Unimar and the Unimar Subsidiaries, or (ii) any payment by the
Company or any Subsidiary, directly or indirectly, in respect of Non-Recourse
Debt to the extent such Person is not legally obligated to make such payment by
the terms of such Debt, or solely in the case of Unimar, Unistar, Inc. or any
of the Unimar Subsidiaries, to the extent such Person is not legally obligated
to fund such payment under the terms of the Unimar Partnership Agreement.

                 "Revolving Credit Period" means the period from and including
the date of this Agreement to but not including the Termination Date.

                 "S&P" means Standard & Poor's Ratings Group, a division of
McGraw-Hill, or any successor to its debt ratings business.

                 "Short-Term Credit Agreement" means the Credit Agreement dated
as of March 29, 1996 among the Company, NationsBank of Texas, N.A., as agent,
the co-agents and the banks parties thereto, providing a $100,000,000 credit
facility to the Company, as may be amended from time to time.

                 "Sterling" and "L." mean pounds sterling (U.K. L.), the lawful
currency of the United Kingdom.

                 "Sterling Business Day" means any Domestic Business Day on
which commercial banks are open for international business (including dealings
in Sterling deposits and Dollar deposits) in London and New York City.

                 "Sterling Interbank Offered Rate" has the meaning set forth 
in Section 2.07(c).

                 "Sterling Lending Office" means, as to each Bank, the office,
branch or affiliate of such Bank located at its address set forth on Schedule
VII hereto or such other office, branch or affiliate of such Bank as it may
hereafter designate as its Sterling Lending Office by notice to the Company and
the Agent.





                                      -23-
<PAGE>   29
                 "Sterling Loan" means a Committed Loan made in Sterling.

                 "Subsidiary" means (a) Unimar and the Unimar Subsidiaries
(except at such times as the Company does not own, directly or indirectly, any
of the ownership interest in Unimar) and (b) any corporation or other entity of
which securities or other ownership interests having ordinary voting power to
elect a majority of the board of directors or other persons performing similar
functions are at the time directly or indirectly owned by the Company, it being
understood that the power to elect exactly 50% of the board of directors or
such other persons does not constitute a "majority" as used herein.

                 "Termination Date" means March 31, 2001, or, if such day is
not a Euro-Dollar Business Day, the Termination Date shall be the next
preceding Euro-Dollar Business Day.

                 "Type" has the meaning specified in the definition of
Committed Loan.

                 "UK Assets" means all Restricted Assets of UTPL as of December
31, 1993.

                 "Unfunded Liabilities" means, with respect to any Plan at any
time, the amount (if any) by which (i) the present value of all benefits under
such Plan as determined by such Plan's actuary exceeds (ii) the fair market
value of all Plan assets allocable to such benefits (excluding any accrued but
unpaid contributions), all determined as of the then most recent valuation date
for such Plan, but only to the extent that such excess represents a potential
liability of a member of the ERISA Group to the PBGC or any other Person under
Title IV of ERISA if such Plan terminated as of such date.

                 "Unimar" means Unimar Company, a partnership organized and
existing under the laws of Texas.

                 "Unimar Partnership Agreement" means the Amended and Restated
Agreement of General Partnership of Unimar dated as of September 11, 1990
between Unistar, Inc. and LASMO (USTAR) Inc. (formerly Ultrastar, Inc.), as
amended from time to time.

                 "Unimar Percentage" means, at any date, the aggregate
percentage ownership interest in Unimar owned at such date by the Company and
the Subsidiaries.

                 "Unimar Restricted Subsidiary" means any Unimar Subsidiary
that is also a Restricted Subsidiary at the relevant date.





                                      -24-
<PAGE>   30
                 "Unimar Subsidiary" means any corporation or other entity of
which securities or other ownership interests having ordinary voting power to
elect a majority of the board of directors or other persons performing similar
functions are at the time directly or indirectly owned by Unimar, it being
understood that the power to elect exactly 50% of the board of directors or
such other persons does not constitute a majority as used herein.

                 "Unrestricted Subsidiary" means any Subsidiary which is not a
Restricted Subsidiary.

                 "UT Pakistan" means Union Texas Pakistan, Inc., a Delaware
corporation.

                 "UTPC" means Union Texas Products Corporation, a Delaware
corporation.

                 "UTPL" means Union Texas Petroleum Limited, an English
company.

                 SECTION 1.02.  Accounting Terms and Determinations.  Unless
otherwise specified herein, all accounting terms used herein shall be
interpreted, all accounting determinations hereunder shall be made, and all
financial statements required to be delivered hereunder shall be prepared in
accordance with generally accepted accounting principles as in effect from time
to time, applied on a basis consistent with the most recent audited
consolidated financial statements of the Company and its Consolidated
Subsidiaries delivered to the Banks (except for changes concurred in by the
Company's independent public accountants); provided that in any determination
of Consolidated Debt if (i) the Company or any Restricted Subsidiary owes any
Debt to an Unrestricted Subsidiary which would otherwise be eliminated in such
determination of Consolidated Debt (the "intercompany Debt") (other than Debt
in an amount not exceeding $10,000,000 in the aggregate at any time and
representing advances by the Unrestricted Subsidiaries to the Company or a
Restricted Subsidiary made in the ordinary course of the cash management
practices of the Company and its Subsidiaries) and (ii) such Unrestricted
Subsidiary owes, at the date of determination, any Debt for borrowed money to a
Person other than the Company or a Subsidiary (the "third party Debt") (other
than any such Debt that also constitutes Debt of the Company or a Restricted
Subsidiary), then an amount equal to the lesser of (1) such intercompany Debt
and (2) such third party Debt, shall not be eliminated in such determination of
Consolidated Debt.

                 SECTION 1.03.  Types of Borrowings.  The term "Borrowing"
denotes the aggregate of Loans of one or more Banks to be made to the Company
pursuant to Article II on a single date and, if such Loans are Committed Loans,
of a single Type, and if such Loans are Fixed Rate Loans, for a single Interest
Period (except as contemplated by paragraph (1)(c) and paragraph (4)(c) of the
definition herein of





                                      -25-
<PAGE>   31
"Interest Period").  Borrowings are classified for purposes of this Agreement
either by reference to the pricing or currency of Loans comprising such
Borrowing (e.g., a "Euro-Dollar Borrowing" is a Borrowing comprised of
Euro-Dollar Loans, and a "Sterling Borrowing" is a Borrowing comprised of
Sterling Loans) or by reference to the provisions of Article II under which
participation therein is determined (i.e., a "Committed Borrowing" is a
Borrowing under Section 2.01 in which all Banks participate in proportion to
their Commitments, while a "Money Market Borrowing" is a Borrowing under
Section 2.03 in which the Bank participants are determined on the basis of
their bids in accordance therewith).

                 SECTION 1.04.  Miscellaneous.  The words "hereof", "herein"
and "hereunder" and words of similar import when used in this Agreement shall
refer to this Agreement as a whole and not to any particular provision of this
Agreement, and Article, Section, Schedule and Exhibit references are to
Articles and Sections of and Schedules and Exhibits to this Agreement, unless
otherwise specified.  The term "including" as used herein means "including
without limitation".  Definitions of terms defined herein shall be applicable
to both the singular and plural forms of the terms defined as appropriate.
References to "directly or indirectly" in respect of ownership of any interest
in any assets shall include, without limitation, direct ownership, indirect
ownership through capital stock or other ownership interest (whether through
one or more levels of subsidiaries, affiliates or other Persons) and any other
direct or indirect ownership arrangement.  Interest and fees shall accrue at
the rates and otherwise as provided in (i) the 1994 Credit Agreement to but
excluding the date of this Agreement, and (ii) this Agreement on and after the
date of this Agreement.

                 SECTION 1.05.  Unimar.  To the extent this Agreement or any
other Financing Document obligates the Company or a Subsidiary to cause Unimar
and the Unimar Subsidiaries to take any action, such obligation shall be
satisfied if (a) the Company votes (or causes a Subsidiary to vote) the Unimar
Percentage in a manner consistent with the obligations of the Company and the
Subsidiaries under the Financing Documents and (b) any representative of the
Company sitting on any management board or board of directors of Unimar or any
of the Unimar Subsidiaries votes, as a member of such management board or board
of directors, in a manner consistent with the obligations of the Company and
the Subsidiaries under the Financing Documents.

                 SECTION 1.06.  Ratings.  A rating, whether public or private,
by S&P or Moody's shall be deemed to be in effect on the date of announcement
or publication by S&P or Moody's, as the case may be, of such rating or, in the
absence of such announcement or publication, on the effective date of such
rating and will remain in effect until the effective date of any change in such
rating.  In the event the standards for any rating by S&P or Moody's are
revised, or such rating is designated differently (such as by changing letter
designations to numerical designations), then the references herein to such
rating shall be changed to the revised or redesignated rating for which





                                      -26-
<PAGE>   32
the standards are closest to, but not lower than, the standards at the date
hereof for the rating which has been revised or redesignated, all as determined
by the Agent in good faith.  Long-term debt supported by a letter of credit,
guaranty (other than guaranties of Subsidiaries) or other similar credit
enhancement mechanism shall not be considered as senior unsecured long-term
debt.


                                   ARTICLE II

                                  THE CREDITS

                 SECTION 2.01.  Commitments to Lend.  During the Revolving
Credit Period each Bank severally agrees, on the terms and conditions set forth
in this Agreement, to make loans to the Company pursuant to this Section 2.01
from time to time in amounts such that the aggregate principal amount of
Committed Loans by such Bank at any one time outstanding to the Company (in the
case of Sterling Loans, such principal amount being the Current Dollar Amount
of such Sterling Loans in effect as of such time) shall not exceed the sum of
(i) the amount of such Bank's Commitment at such time plus (ii) if clause (y)
of Section 2.19(c) is applicable to a particular Borrowing, such Bank's ratable
(based on the respective Commitments of the Banks) portion of the Permitted
Excess applicable to such Borrowing; provided that any amount added pursuant to
this clause (ii) in respect of any particular Borrowing shall not be included
in any subsequent determination of the maximum aggregate principal amount of
Committed Loans which such Bank is obligated to advance to the Company.  Each
Borrowing under this Section 2.01 shall be in an aggregate principal amount of
$10,000,000 (or, in the case of Sterling Loans, $10,000,000 in the Current
Dollar Amounts of such Sterling Loans at the time of such Borrowing or
L.5,000,000, at the option of the Company in its sole discretion) or any larger
multiple of $1,000,000 (or, in the case of Sterling Loans, $1,000,000 in the
Current Dollar Amounts of such Sterling Loans at the time of such Borrowing or
L.1,000,000, as applicable) (except that any such Borrowing may be, subject to
the other terms hereof, in the aggregate amount available in accordance with
Section 3.02(b)) and shall be made from the several Banks ratably in proportion
to their respective Commitments, subject in each case to the effects of Section
2.19(c).  Within the foregoing limits, the Company may borrow under this
Section 2.01, repay (whether pursuant to Section 2.10 or otherwise), or to the
extent permitted by Section 2.11, prepay Loans and reborrow at any time during
the Revolving Credit Period under this Section 2.01.

                 SECTION 2.02.  Notice of Committed Borrowings.  (a)  The
Company shall give the Agent notice (a "Notice of Committed Borrowing") not
later than 10:00 A.M. (Houston time) on (x) the date of each Base Rate
Borrowing, (y) the third Euro-Dollar Business Day before each Euro-Dollar
Borrowing, and (z) the third Sterling Business Day before each Sterling
Borrowing, specifying:





                                      -27-
<PAGE>   33
                 (i)      the date of such Borrowing, which shall be a Domestic
         Business Day in the case of a Base Rate Borrowing, a Euro-Dollar
         Business Day in the case of a Euro-Dollar Borrowing or a Sterling
         Business Day in the case of a Sterling Borrowing,

                 (ii)     the aggregate amount of such Borrowing,

                 (iii)    whether the Loans comprising such Borrowing are to be
         Sterling Loans, Base Rate Loans or Euro-Dollar Loans,

                 (iv)     in the case of a Fixed Rate Borrowing, the duration
         of the initial Interest Period applicable thereto, subject to the
         provisions of the definition herein of "Interest Period", and

                 (v)      if such Interest Period includes (but does not end
         on) a Commitment Reduction Date and all or part of such Loans are to
         be repaid on such date to comply with Section 2.10(c), the aggregate
         amount then to be repaid.

Notwithstanding the foregoing, not more than twelve Borrowings that are either
Euro-Dollar Borrowings or Sterling Borrowings shall be outstanding at any one
time, and any Borrowing which would exceed such limitation shall be made as a
Base Rate Borrowing.

                 (b)      If requested to do so by the Company through the
Agent at least ten Euro-Dollar Business Days before the first day of a proposed
Interest Period for Euro-Dollar Loans, each Bank will advise the Agent before
10:00 A.M. (Houston time) on the sixth Euro-Dollar Business Day preceding the
date of such proposed Interest Period as to whether, if the Company selects a
specified duration of nine or twelve months for such Interest Period, such Bank
expects that deposits in dollars with a corresponding term will be available to
it in the relevant market on the first day of such Interest Period in the
amount required to fund its Loan to which such Interest Period would apply.
Unless a Bank responds by such time to the effect that it expects such deposits
will not be available to it, the Company shall be entitled to select such
proposed duration for such Interest Period.

                 SECTION 2.03.  Money Market Borrowings.

                 (a)      The Money Market Option.  In addition to Committed
Borrowings pursuant to Section 2.01, the Company may, as set forth in this
Section, request the Banks during the Revolving Credit Period to make offers to
make Money Market Loans to the Company in Dollars pursuant to a request
substantially in the form of Exhibit B hereto (a "Money Market Quote Request");
provided that the Company may not make





                                      -28-
<PAGE>   34
a Money Market Quote Request if (assuming such Money Market Quote Request
results in one or more Money Market Loans being made) there would be
outstanding Money Market Loans resulting from more than five different Money
Market Quote Requests.  The Banks may, but shall have no obligation to, make
such offers and the Company may, but shall have no obligation to, accept any
such offers in the manner set forth in this Section.

                 (b)      Money Market Quote Request.  When the Company wishes
to request offers to make Money Market Loans under this Section, it shall
transmit to the Agent by telex or facsimile transmission a Money Market Quote
Request so as to be received no later than 9:00 A.M. (Houston time) on (x) the
fifth Euro-Dollar Business Day prior to the date of Borrowing proposed therein,
in the case of a LIBOR Auction or (y) the Domestic Business Day next preceding
the date of Borrowing proposed therein, in the case of an Absolute Rate Auction
(or, in either case, such other time or date as the Company and the Agent shall
have mutually agreed and shall have notified to the Banks not later than the
date of the Money Market Quote Request for the first LIBOR Auction or Absolute
Rate Auction for which such change is to be effective) specifying:

                 (i)      the proposed date of Borrowing, which shall be a
         Euro-Dollar Business Day in the case of a LIBOR Auction or a Domestic
         Business Day in the case of an Absolute Rate Auction,

                 (ii)     the aggregate amount of such Borrowing, which shall
         be $10,000,000 or a larger multiple of $1,000,000,

                 (iii)    the duration of the Interest Period applicable
         thereto, subject to the provisions of the definition of Interest
         Period, which Interest Period may not be less than one month in the
         case of LIBOR Auction or less than 14 days in the case of an Absolute
         Rate Auction, and

                 (iv)     whether the Money Market Quotes requested are to set
         forth a Money Market Margin or a Money Market Absolute Rate.

The Company may request offers to make Money Market Loans for more than one but
not more than three Interest Periods in a single Money Market Quote Request.
No Money Market Quote Request shall be given within five Euro-Dollar Business
Days (or such other number of days as the Company and the Agent may agree) of
any other Money Market Quote Request.  No Money Market Quote Request shall be
given if the amount of the Borrowing requested therein plus the aggregate
outstanding principal amount of all Money Market Loans scheduled to be
outstanding on the date of such Borrowing would exceed $300,000,000.  On each
date on which the Company makes





                                      -29-
<PAGE>   35
a Money Market Quote Request it shall pay to the Agent for its account an
administrative fee of $1,000.

                 (c)      Invitation for Money Market Quotes.  Promptly upon
receipt of a Money Market Quote Request, the Agent shall send to the Banks by
telex or facsimile transmission an invitation for Money Market Quotes
substantially in the form of Exhibit C hereto (an "Invitation for Money Market
Quotes"), which shall constitute an invitation by the Company to each Bank to
submit Money Market Quotes offering to make the Money Market Loans in Dollars
to which such Money Market Quote Request relates in accordance with this
Section; provided that the Agent shall not be required to send an Invitation
for Money Market Quotes to any Bank that has failed to submit a Money Market
Quote after each of the last three Invitations for Money Market Quotes sent to
such Bank unless the Company or such Bank has given notice to the Agent
specifically referring to such Invitation for Money Market Quotes and
requesting that this proviso not apply to such Invitation for Money Market
Quotes.

                 (d)      Submission and Contents of Money Market Quotes.  (i)
Each Bank may submit a Money Market Quote containing an offer or offers to make
Money Market Loans in Dollars in response to any Invitation for Money Market
Quotes.  Each Money Market Quote must comply with the requirements of this
subsection (d) and must be submitted to the Agent by telex or facsimile
transmission at its offices specified in or pursuant to Section 9.01 not later
than (x) 1:00 P.M. (Houston time) on the fourth Euro-Dollar Business Day prior
to the proposed date of Borrowing, in the case of a LIBOR Auction or (y) 9:00
A.M. (Houston time) on the proposed date of Borrowing, in the case of an
Absolute Rate Auction (or, in either case, such other time or date as the
Company and the Agent shall have mutually agreed and shall have notified to the
Banks not later than the date of the Money Market Quote Request for the first
LIBOR Auction or Absolute Rate Auction for which such change is to be
effective); provided that Money Market Quotes submitted by the Agent (or any
affiliate of the Agent) in the capacity of a Bank may be submitted, and may
only be submitted, if the Agent or such affiliate notifies the Company of the
terms of the offer or offers contained therein not later than (x) 12:00 Noon
(Houston time) on the fourth Euro-Dollar Business Day prior to the proposed
date of Borrowing, in the case of a LIBOR Auction or (y) 8:45 A.M. (Houston
time) on the proposed date of Borrowing, in the case of an Absolute Rate
Auction.  Subject to Articles III and VI, any Money Market Quote so made shall
be irrevocable except with the written consent of the Agent given on the
instructions of the Company.

                 (ii)     Each Money Market Quote shall be in substantially the
form of Exhibit D hereto and shall in any case specify:

                 (A)      the proposed date of Borrowing,





                                      -30-
<PAGE>   36
                 (B)      the principal amount of the Money Market Loan for
         which each such offer is being made, which principal amount (w) may be
         greater than, equal to or less than the Commitment of the quoting
         Bank, (x) must be in Dollars and must be $5,000,000 or a larger
         multiple of $1,000,000, (y) may not exceed the principal amount of
         Money Market Loans for which offers were requested and (z) may be
         subject to an aggregate limitation as to the principal amount of Money
         Market Loans for which offers being made by such quoting Bank may be
         accepted,

                 (C)      in the case of a LIBOR Auction, the margin above or
         below the applicable London Interbank Offered Rate (the "Money Market
         Margin") offered for each such Money Market Loan, expressed as a
         percentage (rounded to the nearest 1/10,000th of 1%) to be added to or
         subtracted from such London Interbank Offered Rate,

                 (D)      in the case of an Absolute Rate Auction, the rate of
         interest per annum (rounded to the nearest 1/10,000th of 1%) (the
         "Money Market Absolute Rate") offered for each such Money Market Loan,
         and

                 (E)      the identity of the quoting Bank.

A Money Market Quote may set forth up to five separate offers by the quoting
Bank with respect to each Interest Period specified in the related Invitation
for Money Market Quotes.

            (iii) Any Money Market Quote shall be disregarded if it:

                 (A)      is not substantially in conformity with Exhibit D
         hereto or does not specify all of the information required by
         subsection (d)(ii);

                 (B)      contains qualifying, conditional or similar language;

                 (C)      proposes terms other than or in addition to those set
         forth in the applicable Invitation for Money Market Quotes; or

                 (D)      arrives after the appropriate time set forth in 
         subsection (d)(i).

                 (e)      Notice to Company.  The Agent shall promptly notify
the Company of the terms (x) of any Money Market Quote submitted by a Bank that
is in accordance with subsection (d) and (y) of any Money Market Quote that
amends, modifies or is otherwise inconsistent with a previous Money Market
Quote submitted





                                      -31-
<PAGE>   37
by such Bank with respect to the same Money Market Quote Request.  Any such
subsequent Money Market Quote shall be disregarded by the Agent unless such
subsequent Money Market Quote is submitted solely to correct a manifest error
in such former Money Market Quote.  The Agent's notice to the Company shall
specify (A) the aggregate principal amount of Money Market Loans for which
offers have been received for each Interest Period specified in the related
Money Market Quote Request, (B) the respective principal amounts and Money
Market Margins or Money Market Absolute Rates, as the case may be, so offered
and (C) if applicable, limitations on the aggregate principal amount of Money
Market Loans for which offers in any single Money Market Quote may be accepted.

                 (f)      Acceptance and Notice by Company.  Not later than
9:30 A.M. (Houston time) on (x) the third Euro-Dollar Business Day prior to the
proposed date of Borrowing, in the case of a LIBOR Auction or (y) the proposed
date of Borrowing, in the case of an Absolute Rate Auction (or, in either case,
such other time or day as the Company and the Agent shall have mutually agreed
and shall have notified to the Banks not later than the date of the Money
Market Quote Request for the first LIBOR Auction or Absolute Rate Auction for
which such change is to be effective), the Company shall notify the Agent of
its acceptance or nonacceptance of the offers so notified to it pursuant to
subsection (e).  In the case of acceptance, such notice (a "Notice of Money
Market Borrowing") shall specify the aggregate principal amount of offers for
each Interest Period that are accepted.  The Company may accept any Money
Market Quote in whole or in part; provided that:

                 (i)      the aggregate principal amount of each Money Market
         Borrowing may not exceed the applicable amount set forth in the
         related Money Market Quote Request,

                 (ii)     each Money Market Borrowing must be in Dollars, and
         the principal amount of each Money Market Borrowing must be
         $10,000,000 or a larger multiple of $1,000,000,

                 (iii)    acceptance of offers may only be made on the basis of
         ascending Money Market Margins or Money Market Absolute Rates, as the
         case may be, and

                 (iv)     the Company may not accept any offer that is
         described in subsection (d)(iii) or that otherwise fails to comply
         with the requirements of this Agreement.

If the Company shall not have notified the Agent of its acceptance or
non-acceptance of the offers pursuant to this subsection (f), the Company shall
be deemed not to have accepted any offer so notified to it pursuant to
subsection (e).





                                      -32-
<PAGE>   38
                 (g)      Allocation by Agent.  If offers are made by two or
more Banks with the same Money Market Margins or Money Market Absolute Rates,
as the case may be, for a greater aggregate principal amount than the amount in
respect of which such offers are accepted for the related Interest Period, the
principal amount of Money Market Loans in respect of which such offers are
accepted shall be allocated by the Agent among such Banks as nearly as possible
(in multiples of $1,000,000, as the Agent may deem appropriate) in proportion
to the aggregate principal amounts of such offers.  Determinations by the Agent
of the amounts of Money Market Loans shall be conclusive in the absence of
manifest error.

                 (h)      Information.  Within 15 days after receipt of each
Money Market Quote Request, the Agent will deliver to the Company a copy of
each Money Market Quote received by it pursuant to the related Invitation for
Money Market Quotes.

                 SECTION 2.04.  Notice to Banks; Funding of Loans.  (a)  Upon
receipt of a Notice of Borrowing, the Agent shall promptly (except in the case
of notice to a Bank with respect to an acceptance of such Bank's Money Market
Quote by the Company, by no later than 10:30 A.M. (Houston time) by telephone
or facsimile transmission) notify each Bank of the contents thereof and of such
Bank's share (if any) of such Borrowing and such Notice of Borrowing shall not
thereafter be revocable by the Company.

                 (b)      Not later than 12:00 Noon (London time in the case of
Sterling Borrowings and Houston time in the case of all other Borrowings) on
the date of each Borrowing, each Bank participating therein shall (except as
provided in subsection (c) of this Section 2.04) make available its share of
such Borrowing, (x) in the case of all Borrowings other than Sterling
Borrowings, in Federal or other funds immediately available in Houston, to the
Agent at its address specified in or pursuant to Section 9.01 in Dollars, and
(y) in the case of Sterling Borrowings, in funds immediately available in
London, to the Agent at NationsBank of North Carolina, N.A., New Broad Street
House, 35 New Broad Street, London, EC2M 1NH England, United Kingdom or such
other address in London as the Agent may hereafter specify by notice to the
Company and the Banks, in Sterling.  Unless the Agent determines that any
applicable condition specified in Article III has not been satisfied, the Agent
will make the funds so received from the Banks available to the Company at the
Agent's relevant aforesaid address.

                 (c)      If any Bank makes a new Loan hereunder in either
currency available hereunder (i.e., Dollars or Sterling) to the Company on a
day on which the Company is to repay all or any part of an outstanding Loan in
either currency from such Bank, such Bank shall apply the proceeds of its new
Loan to make such repayment and only an amount equal to the difference (if any)
between the amount being borrowed by the Company (based on the Current Dollar
Amount thereof then in effect in the case of Sterling Borrowings) and the
amount being repaid (based on the





                                      -33-
<PAGE>   39
Current Dollar Amount thereof then in effect in the case of Sterling
Borrowings) shall be made available by such Bank to the Agent in the applicable
currency as provided in subsection (b), or remitted by the Company to the Agent
as provided in Section 2.12, as the case may be; provided that in any case in
which this Section 2.04(c) would apply to the making of a new Loan in one
currency and a payment of an outstanding Loan in the other currency, the
Company may, by notice to the Agent given not later than 10:00 A.M. (Houston
time) on the third Sterling Business Day prior to the date of such new Loan,
elect that this Section 2.04(c) not apply to such Loan and payment on such
date.

                 (d)      Unless the Agent shall have received notice from a
Bank prior to the date of any Borrowing that such Bank will not make available
to the Agent such Bank's share of such Borrowing, the Agent may assume that
such Bank has made such share available to the Agent on the date of such
Borrowing in accordance with subsections (b) and (c) of this Section 2.04 and
the Agent may, in reliance upon such assumption, make available to the Company
on such date a corresponding amount.  If and to the extent that such Bank shall
not have so made such share available to the Agent, such Bank and the Company
severally agree to repay to the Agent forthwith on demand such corresponding
amount together with interest thereon, for each day from the date such amount
is made available to the Company until the date such amount is repaid to the
Agent, at (i) in the case of the Company, a rate per annum equal to the higher
of the Federal Funds Rate and the interest rate applicable thereto pursuant to
Section 2.07 and (ii) in the case of such Bank, (x) if such Borrowing is not a
Sterling Borrowing, the Federal Funds Rate, and (y) if such Borrowing is a
Sterling Borrowing, the higher of (1) the Federal Funds Rate and (2) the rate
per annum determined by the Agent as being the average rate quoted to
NationsBank for such day (or, if such day is not a Sterling Business Day, for
the next preceding Sterling Business Day) for overnight transactions in
Sterling in London with other leading banks.  If such Bank shall repay to the
Agent such corresponding amount, such amount so repaid shall constitute such
Bank's Loan included in such Borrowing for purposes of this Agreement.

                 SECTION 2.05.  Notes.  (a)  The Loans of each Bank to the
Company shall be evidenced by a single Note of the Company payable to the order
of such Bank for the account of its Applicable Lending Office in an amount
equal to the aggregate unpaid principal amount of such Bank's Loans to the
Company.

                 (b)      Each Bank may, by notice to the Company and the
Agent, request that its (i) Euro-Dollar Loans and Money Market LIBOR Loans,
(ii) Base Rate Loans and Money Market Absolute Rate Loans, (iii) Sterling Loans
or (iv) any combination of the foregoing, payable to such Bank (or such lending
office, agency or branch of such Bank as such Bank may specify in such request)
be evidenced by a separate Note of the Company.  Each such Note shall be
substantially in the form of Exhibit A hereto





                                      -34-
<PAGE>   40
with appropriate modifications to reflect the fact that it evidences solely
Loans of the relevant grouping.  Any Bank that receives multiple Notes through
the application of this Section 2.05(b) agrees that: (1) the aggregate
principal amount payable by the Company under (A) the Notes issued to such Bank
pursuant to this Section 2.05(b) plus (B) all other Notes issued to such Bank
pursuant to this Agreement, shall never exceed the aggregate principal amount
of the Loans owed to such Bank (including, if applicable, the separate lending
offices, agencies or branches of such Bank) and (2) the payees of the Notes
issued at the request of such Bank shall enjoy no greater rights (voting or
otherwise) than such Bank would enjoy in the absence of such request and such
payees (including, if applicable, the separate lending offices, agencies or
branches of such Bank) shall be considered a single Bank for purposes of this
Agreement.  Each reference in this Agreement to the "Note" of such Bank shall
be deemed to refer to and include any or all such Notes, as the context may
require.

                 (c)      Upon receipt of each Bank's Note pursuant to Section
3.01(b), the Agent shall mail or send by private delivery service such Note to
such Bank.  Each Bank shall record the date, amount, maturity, currency and, if
applicable, Type of each Loan made by it to the Company and the date and amount
of each payment of principal made with respect thereto, and prior to any
transfer of its Note shall endorse on the schedule forming a part thereof
appropriate notations to evidence the foregoing information with respect to
each such Loan then outstanding; provided that the failure of any Bank to make
any such recordation or endorsement shall not affect the obligations of the
Company under any of the Financing Documents.  Each Bank is hereby irrevocably
authorized by the Company so to endorse any Note and to attach to and make a
part of any Note a continuation of any such schedule as and when required.

                 SECTION 2.06.  Maturity of Loans.  Subject to Section 2.10,
each Committed Loan shall mature, and the principal amount thereof shall be due
and payable, on the Termination Date.  Each Money Market Loan included in any
Borrowing shall mature, and the principal amount thereof shall be due and
payable, on the last day of the Interest Period applicable to such Borrowing.

                 SECTION 2.07.  Interest Rates.  The Company shall pay interest
on the unpaid principal amount of each Loan from the date of such Loan until
such principal amount shall be paid in full, at the following rates per annum:

                 (a)      If such Loan is a Base Rate Loan, for each day that
such Loan is a Base Rate Loan, at a rate per annum equal to the sum of (i) the
Base Rate for such day plus (ii) at such times as any Event of Default exists,
1%.  Such interest shall be payable quarterly on each March 31, June 30,
September 30 and December 31 and on the date such Base Rate Loan is Converted
or paid in full.  Any overdue interest on any Base Rate Loan shall bear
interest, payable on demand, for each day until paid at a rate per annum equal
to the sum of 1% plus the otherwise applicable rate for such day.





                                      -35-
<PAGE>   41
                 (b)      If such Loan is a Euro-Dollar Loan, at a rate per
annum equal at all times during any Interest Period for such Loan to the sum of
(i) the applicable London Interbank Offered Rate plus (ii) the Applicable
Margin for such Interest Period plus (iii) at such times as any Event of
Default exists, 1%; provided that if any Euro-Dollar Loan or any portion
thereof shall, as a result of clause (1)(c)(i) of the definition herein of
"Interest Period", have an Interest Period of less than one month, such portion
shall bear interest during such Interest Period at the rate applicable to Base
Rate Loans during such period.  Such interest shall be payable for each
Interest Period on the last day thereof and, if such Interest Period is longer
than three months, at intervals of three months after the first day thereof.

                 The "London Interbank Offered Rate" applicable to any Interest
Period means the arithmetic 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 Euro-Dollar Business Days
before the first day of such Interest Period in an amount approximately equal
to the principal amount in Dollars of the Euro-Dollar Loan of such Reference
Bank to which such Interest Period is to apply and for a period of time
comparable to such Interest Period.

                 (c)      If such Loan is a Sterling Loan, at a rate per annum
equal at all times during any Interest Period for such Loan to the sum of (i)
the applicable Sterling Interbank Offered Rate plus (ii) the Applicable Margin
for such Interest Period plus (iii) at such times as any Event of Default
exists, 1%; provided that if any Sterling Loan or any portion thereof shall, as
a result of clause (4)(c)(i) of the definition herein of "Interest Period",
have an Interest Period of less than one month, such portion shall bear
interest during such Interest Period at the rate otherwise applicable to such
Sterling Loans during such period plus 1/2%.  Such interest shall be payable
for each Interest Period on the last day thereof and, if such Interest Period
is longer than three months, at intervals of three months after the first day
thereof.

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

                 (d)      Any overdue principal of or interest on any
Euro-Dollar Loan shall bear interest, payable on demand, for each day from and
including the date payment thereof was due to but excluding the date of actual
payment, at a rate per annum equal





                                      -36-
<PAGE>   42
to the sum of 1% plus the higher of (i) the sum of the London Interbank Offered
Rate applicable to such Loan plus the Applicable Margin applicable to an
Interest Period of a Euro-Dollar Loan if such Euro-Dollar Loan were to commence
on such day and (ii) the sum of (1) the average (rounded upward, if necessary,
to the next higher 1/16 of 1%) of the respective rates per annum at which one
day (or, if such amount due remains unpaid more than three Euro-Dollar Business
Days, then for such other period of time not longer than three months as the
Agent may select) deposits in Dollars in an amount approximately equal to such
overdue payment due to each of the Reference Banks are offered to such
Reference Bank in the London interbank market for the applicable period
determined as provided above plus (2) the Applicable Margin applicable to an
Interest Period of a Euro-Dollar Loan if such Euro-Dollar Loan were to commence
on such day (or, if the circumstances described in clause (i) or (ii) of
Section 8.01(a) shall exist, at a rate per annum equal to the sum of 1% plus
the rate applicable to Base Rate Loans for such day).

                 (e)      Any overdue principal of or interest on any Sterling
Loan shall bear interest, payable on demand, for each day from and including
the date payment thereof was due to but excluding the date of actual payment,
at a rate per annum equal to the sum of 1% plus the higher of (i) the sum of
the Sterling Interbank Offered Rate applicable to such Loan plus the Applicable
Margin applicable to an Interest Period of a Sterling Loan if such Sterling
Loan were to commence on such day and (ii) the sum of (1) the average (rounded
upward, if necessary, to the next higher 1/16 of 1%) of the respective rates
per annum at which one day (or, if such amount due remains unpaid more than
three Sterling Business Days, then for such other period of time not longer
than three months as the Agent may select) deposits in Sterling in an amount
approximately equal to such overdue payment due to each of the Reference Banks
are offered to such Reference Bank in the London interbank market for the
applicable period determined as provided above plus (2) the Applicable Margin
applicable to an Interest Period of a Sterling Loan if such Sterling Loan were
to commence on such day (or, if the circumstances described in clause (i) or
(ii) of Section 8.01(b) shall exist, at a rate per annum equal to the sum of 1%
plus the rate applicable to Base Rate Loans for such day).

                 (f)      Subject to Section 8.01(a), each Money Market LIBOR
Loan shall bear interest on the outstanding principal amount thereof, for the
Interest Period applicable thereto, at a rate per annum equal to the sum of the
London Interbank Offered Rate for such Interest Period (determined in
accordance with Section 2.07(b) as if the related Money Market LIBOR Borrowing
were a Committed Euro-Dollar Borrowing) plus (or minus) the Money Market Margin
quoted by the Bank making such Loan in accordance with Section 2.03 plus, at
such times as any Event of Default exists, 1%.  Each Money Market Absolute Rate
Loan shall bear interest on the outstanding principal amount thereof, for the
Interest Period applicable thereto, at a rate per annum equal to the Money
Market Absolute Rate quoted by the Bank making such Loan in





                                      -37-
<PAGE>   43
accordance with Section 2.03 plus, at such times as any Event of Default
exists, 1%.  Such interest shall be payable for each Interest Period on the
last day thereof and, if such Interest Period is longer than three months, at
intervals of three months after the first day thereof.  Any overdue principal
of or interest on any Money Market Loan shall bear interest, payable on demand,
for each day until paid at a rate per annum equal to the sum of 1% plus the
Base Rate for such day.

                 (g)      The Agent shall determine each interest rate
applicable to the Loans hereunder.  The Agent shall give prompt notice to the
Company and the participating Banks of each rate of interest so determined, and
its determination thereof shall be conclusive in the absence of manifest error.
Upon request of the Company, the Agent shall furnish to it such information as
to its determinations hereunder as the Company may reasonably request.

                 (h)      Each Reference Bank agrees to use its best efforts to
furnish quotations to the Agent as contemplated by this Section 2.07.  If any
Reference Bank does not furnish a timely quotation, the Agent shall determine
the relevant interest rate on the basis of the quotation or quotations
furnished by the remaining Reference Bank or Banks or, if none of such
quotations is available on a timely basis, the provisions of Section 8.01 shall
apply.

                 (i)      This Section 2.07 and each other provision in any of
the Financing Documents or in any other agreement executed in connection
herewith are specifically made subject to Section 2.16.

                 SECTION 2.08.  Facility Fees.  (a)         The Company shall
pay to the Agent for the account of the Banks ratably a facility fee at the
rate per annum for each calendar quarter determined as provided in Schedule
VIII based on the Rating Level in effect on the first day of such quarter.
Such facility fee shall accrue (i) from and including the date of this
Agreement to but excluding the earlier of the Termination Date or the date the
Commitments are otherwise terminated, on the daily average aggregate amount of
the Commitments (whether used or unused) and (ii) from and including the
earlier of the Termination Date or the date the Commitments are otherwise
terminated to but excluding the date the Loans shall be repaid in their
entirety, on the daily average aggregate outstanding principal amount of the
Loans (in the case of Sterling Loans, based on the Current Dollar Amounts
thereof from time to time during such period).

                 (b)      Payments.  Accrued fees under this Section 2.08
(other than Section 2.08(c)) shall be payable quarterly on each March 31, June
30, September 30 and December 31 and upon the date of termination of the
Commitments in their entirety (and, if later, the date the Loans shall be
repaid in their entirety).





                                      -38-
<PAGE>   44
                 (c)      1994 Credit Agreement.  On the date of this
Agreement, the Company shall pay to the Agent for the account of the Banks and
any other lenders under the 1994 Credit Agreement, the commitment fees and
facility fees accrued thereunder to but excluding the date of this Agreement.

                 SECTION 2.09.  Optional Termination or Reduction of
Commitments.  The Company may, upon at least three Domestic Business Days'
notice to the Agent, (i) terminate the Commitments at any time, if no Loans are
outstanding at such time or (ii) ratably reduce from time to time by an
aggregate amount of $10,000,000 or any larger multiple of $5,000,000 the
aggregate amount of the Commitments in excess of the aggregate outstanding
principal amount of the Loans (in the case of Sterling Loans, such principal
amount being the Current Dollar Amounts thereof then in effect).

                 SECTION 2.10.  Mandatory Termination or Reduction of
Commitments; Mandatory Prepayments.  (a)  The Commitments shall terminate on
the Termination Date and any Loans then outstanding (together with accrued
interest thereon) shall be due and payable on such date.

                 (b)      The Commitment of each Bank shall be automatically
reduced, on each Commitment Reduction Date, to an amount equal to such Bank's
ratable share of (i) the amount of maximum aggregate Commitments set forth in
Schedule I with respect to such Commitment Reduction Date minus (ii) the
aggregate amount of all reductions of the Commitments pursuant to Section 2.09
or Section 2.10(d) applicable to such Commitment Reduction Date pursuant to the
following sentence.  Each reduction of the Commitments pursuant to Section 2.09
or Section 2.10(d) shall be applied to reduce each amount set forth on Schedule
I for each subsequent Commitment Reduction Date by an amount equal to the
amount of such reduction divided by the number of Commitment Reduction Dates to
occur on or after the date such reduction is effective.

                 (c)      On each Commitment Reduction Date, the Company shall
be obligated to repay such principal amount (together with accrued interest
thereon) of each Bank's outstanding Committed Loans, if any, as may be
necessary so that after such repayment the aggregate outstanding principal
amount of such Bank's Committed Loans (in the case of Sterling Loans, such
principal amount being the Current Dollar Amounts of such Sterling Loans in
effect on such Commitment Reduction Date) does not exceed the amount of such
Bank's Commitment as then reduced.  Whenever the Interest Period specified in a
Notice of Committed Borrowing includes (but does not end on) a Commitment
Reduction Date on which a payment of Committed Loans will be required under
this subsection (c), the Company shall consider whether it wishes to repay on
such Commitment Reduction Date all or part of the Borrowing to be made pursuant
to such Notice of Committed Borrowing and, if so, shall specify the aggregate
amount so to be repaid in such Notice of Committed Borrowing.  If the Company
fails so to select the Committed Borrowing to be repaid on any Commitment
Reduction Date, such Committed Borrowing shall be selected by the Agent.





                                      -39-
<PAGE>   45
                 (d)      On the fifth Domestic Business Day following any
Asset Sale that results in positive Excess Net Sales Proceeds, (i) the Company
will deliver to each of the Banks a certificate of the chief financial officer,
the chief accounting officer or the treasurer of the Company certifying the
amount of such Excess Net Sales Proceeds from such Asset Sale, (ii) the
Commitments shall be automatically reduced ratably by an amount equal to 100%
of the amount of such Excess Net Sales Proceeds from such Asset Sale, (iii) the
Company shall be obligated to repay such principal amount (together with
accrued interest thereon) of each Bank's outstanding Committed Loans, if any,
as may be necessary so that after such repayment the aggregate outstanding
principal amount of such Bank's Committed Loans (in the case of Sterling Loans,
such principal amount being the Current Dollar Amounts of such Sterling Loans
in effect on the date of such reduction) does not exceed the amount of such
Bank's Commitment as then reduced.

                 (e)      If, on any Adjustment Date, either (i) the aggregate
outstanding principal amount of any Bank's Committed Loans (in the case of
Sterling Loans, such principal amount being the Current Dollar Amounts of such
Sterling Loans in effect on such Adjustment Date) exceeds the amount of such
Bank's Commitment or (ii) the aggregate outstanding principal amount of all
Loans (in the case of Sterling Loans, such principal amount being the Current
Dollar Amounts of such Sterling Loans in effect on such Adjustment Date)
exceeds the aggregate amount of the Commitments, then on such Adjustment Date,
the Company shall be obligated to repay such principal amount (together with
accrued interest thereon) of each Bank's outstanding Committed Loans as may be
necessary so that after such repayment (x) the aggregate outstanding principal
amount of each Bank's Committed Loans (in the case of Sterling Loans, such
principal amount being the Current Dollar Amounts of such Sterling Loans in
effect on such Adjustment Date) does not exceed the amount of such Bank's
Commitment on such Adjustment Date, and (y) the aggregate outstanding principal
amount of all Loans (in the case of Sterling Loans, such principal amount being
the Current Dollar Amounts of such Sterling Loans in effect on such Adjustment
Date) does not exceed the aggregate amount of the Commitments; provided that if
the aggregate payment that is required to be made pursuant to this Section
2.10(e) on any Adjustment Date (other than any Adjustment Date referred to in
clause (iii) of the definition herein of "Adjustment Date") is less than
$1,000,000, then the Company shall not be required to make such payment on such
Adjustment Date pursuant to this Section 2.10(e).

                 SECTION 2.11.  Optional Prepayments.  (a)  The Company may,
upon at least one Domestic Business Day's (or in the case of prepayments on any
Sterling Borrowing, three Sterling Business Days') notice to the Agent, prepay
any Borrowing in whole at any time, or from time to time in part in amounts
aggregating $10,000,000 (or, in the case of Sterling Borrowings, $10,000,000 in
the Current Dollar Amounts of such Sterling Loans then in effect or
L.5,000,000, at the option of the Company in its sole discretion) or any larger
multiple of $1,000,000 (or, in the case of Sterling Borrowings, $1,000,000 in
the Current Dollar Amounts of such Sterling Loans then in effect or
L.1,000,000, as applicable), by paying the principal amount to be prepaid





                                      -40-
<PAGE>   46
together with accrued interest thereon to the date of prepayment; provided that
no partial prepayment of a Sterling Borrowing, a Euro-Dollar Borrowing or a
Money Market Borrowing shall be made if after giving effect thereto the
principal amount of such Borrowing would be less than $10,000,000 (or, in the
case of Sterling Borrowings, the lesser of $10,000,000 in the Current Dollar
Amounts of such Sterling Loans then in effect and L.5,000,000).  Each such
optional prepayment shall be applied to prepay ratably the Loans of the several
Banks included in such Borrowing.

                 (b)      Upon receipt of a notice of prepayment pursuant to
this Section, the Agent shall promptly notify each Bank of the contents thereof
and of such Bank's ratable share (if any) of such prepayment and such notice
shall not thereafter be revocable by the Company.

                 SECTION 2.12.  General Provisions as to Payments.  (a) The
Company shall make each payment of principal of, and interest on, the Loans and
of fees hereunder, not later than 12:00 Noon (London time in the case of
Sterling Loans and Houston time in the case of all other Loans and fees) on the
date when due, (i) in the case of fees and all Loans other than Sterling Loans,
in Federal or other funds immediately available in Houston, to the Agent at its
address referred to in Section 9.01, in Dollars, and (ii) in the case of
Sterling Loans, in funds immediately available in London, to the Agent at its
address referred to in Section 2.04(b), in Sterling.  The Agent will promptly
distribute to each Bank its ratable share of each such payment received by the
Agent for the account of the Banks.  Whenever any payment of principal of, or
interest on, the Base Rate Loans or of fees shall be due on a day which is not
a Domestic Business Day, the date for payment thereof shall be extended to the
next succeeding Domestic Business Day.  Whenever any payment of principal of,
or interest on, the Euro-Dollar Loans shall be due on a day which is not a
Euro-Dollar Business Day, the date for payment thereof shall be extended to the
next succeeding Euro-Dollar Business Day unless such Euro-Dollar Business Day
falls in another calendar month, in which case the date for payment thereof
shall be the next preceding Euro-Dollar Business Day.  Whenever any payment of
principal of, or interest on, the Money Market Loans shall be due on a day
which is not a Euro-Dollar Business Day, the date for payment thereof shall be
extended to the next succeeding Euro-Dollar Business Day.  Whenever any payment
of principal of, or interest on, the Sterling Loans shall be due on a day which
is not a Sterling Business Day, the date for payment thereof shall be extended
to the next succeeding Sterling Business Day unless such Sterling Business Day
falls in another calendar month, in which case the date for payment thereof
shall be the next preceding Sterling Business Day.  If the date for any payment
of principal is extended by operation of law or otherwise, interest thereon
shall be payable for such extended time.

                 (b)      Unless the Agent shall have received notice from the
Company prior to the date on which any payment is due from the Company to the
Banks hereunder that the Company will not make such payment in full, the Agent
may assume that the Company has made such payment in full to the Agent on such
date and the





                                      -41-
<PAGE>   47
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 that the Company shall not have so made such payment, each Bank
shall repay to the Agent forthwith on demand such amount distributed to such
Bank together with interest thereon, for each day from the date such amount is
distributed to such Bank until the date such Bank repays such amount to the
Agent, at (i) if such amount was distributed in Dollars, the Federal Funds
Rate, and (ii) if such amount was distributed in Sterling, the higher of (x)
the Federal Funds Rate and (y) the rate per annum determined by the Agent as
being the average rate quoted to NationsBank for such day (or, if such day is
not a Sterling Business Day, for the next preceding Sterling Business Day) for
overnight transactions in Sterling in London with other leading banks.

                 (c)      At the time of each payment of principal of any Loan,
the Company shall specify, by notice to the Agent, the Loans to which such
payment shall be applied.  If the Company fails to so specify, the Agent shall
apply such payment first to such Committed Loans as the Agent may select and,
after payment in full of the Committed Loans, to such other Loans as the Agent
may select.

                 SECTION 2.13.  Funding Losses.  If the Company makes any
payment of principal with respect to any Fixed Rate Loan (pursuant to Article
II, VI or VIII or otherwise) on any day other than the last day of the Interest
Period applicable thereto, or the end of an applicable period fixed pursuant to
Section 2.07(d) or Section 2.07(e), or if the Company fails to borrow any Fixed
Rate Loans after notice has been given to any Bank in accordance with Section
2.04(a), or if any Conversion of any Euro-Dollar Loan or Sterling Loan occurs
on any day other than the last day of an Interest Period applicable thereto or
fails to occur as contemplated herein, the Company shall reimburse each Bank
within 15 days after demand for any resulting loss or expense incurred by it
(or by an existing or prospective Participant in the related Loan), including
(without limitation) any loss incurred in obtaining, liquidating or employing
deposits from third parties, but excluding loss of margin from the period after
any such payment or failure to borrow and, in the case of any such payment or
Conversion occurring on a day other than the last day of the applicable
Interest Period, losses resulting from currency fluctuations after such payment
or such Conversion; provided that such Bank shall have delivered to the Company
a certificate as to the amount of such loss or expense, which certificate shall
be conclusive in the absence of manifest error; provided further that, the
Company shall not be required to reimburse a Bank for any such loss or expense
resulting from the failure of a Conversion to occur if such failure is the
fault of such Bank.

                 SECTION 2.14.  Computation of Interest and Fees.  Interest
based on the Base Rate hereunder shall be computed on the basis of a year of
365 days (or 366 days in a leap year) and paid for the actual number of days
elapsed (including the first day but excluding the last day).  Interest based
on the Sterling Interbank Offered Rate shall be computed on the basis of a year
of 365 days (or 366 days in a leap year), and in each case paid for the actual
number of days elapsed (including the first day but





                                      -42-
<PAGE>   48
excluding the last day).  All other interest and fees shall be computed on the
basis of a year of 360 days and paid for the actual number of days elapsed
(including the first day but excluding the last day).

                 SECTION 2.15.  Chapter 15.  In no event shall the provisions
of Article 5069, Chapter 15 of the Revised Civil Statutes of Texas (which
regulates certain revolving credit loan accounts and revolving tri-party
accounts) apply to any Loan made hereunder.

                 SECTION 2.16.  Maximum Interest Rate.  (a) Nothing contained
in this Agreement or the Notes shall require the Company to pay interest at a
rate exceeding the maximum rate permitted without penalty by applicable law.
Each provision in the Financing Documents and any other agreement executed in
connection herewith is expressly limited so that in no event whatsoever shall
the amount paid thereunder, or otherwise paid, by the Company for the use,
forbearance or detention of the money to be loaned under this Agreement, exceed
that amount of money which would cause the effective rate of interest thereon
to exceed the maximum rate of interest permitted without penalty under
applicable law, and all amounts payable under the Financing Documents or any
other agreement executed in connection herewith, or otherwise payable in
connection therewith, shall be subject to reduction so that such amounts paid
or payable for the use, forbearance or detention of money to be loaned under
this Agreement shall not exceed that amount of money which would cause the
effective rate of interest thereon to exceed the maximum rate of interest
permitted without penalty under applicable law.

                 (b)      If the amount of interest payable for the account of
any Bank on any interest payment date in respect of the immediately preceding
interest computation period, computed pursuant to Section 2.07, would exceed
the maximum amount permitted without penalty by applicable law to be charged by
such Bank, the amount of interest payable for its account on such interest
payment date shall be automatically reduced to such maximum permissible amount.

                 (c)      If the amount of interest payable for the account of
any Bank in respect of any interest computation period is reduced pursuant to
clause (b) of this Section and the amount of interest payable for its account
in respect of any subsequent interest computation period, computed pursuant to
Section 2.07, would be less than the maximum amount permitted without penalty
by applicable law to be charged by such Bank, then the amount of interest
payable for its account in respect of such subsequent interest computation
period shall be automatically increased to such maximum permissible amount;
provided that at no time shall the aggregate amount by which interest paid for
the account of any Bank has been increased pursuant to this clause (c) exceed
the aggregate amount by which interest paid for its account has theretofore
been reduced pursuant to clause (b) of this Section.





                                      -43-
<PAGE>   49
                 (d)      In the event that maturity of the Loans is
accelerated for any reason, or in the event of any required or permitted
prepayment of the Loans, then such consideration that constitutes interest
payable for the account of any Bank shall never include more than the maximum
amount allowed without penalty by applicable law to be charged by such Bank and
excess interest, if any, payable for the account of such Bank pursuant to its
Note, this Agreement or otherwise shall be cancelled automatically as of the
date of such acceleration or prepayment and, if theretofore paid, shall be
credited on the Loans of such Bank (or, to the extent in excess of such Loans,
refunded by such Bank to the Company).

                 (e)      It is further agreed that, without limitation of the
foregoing, all calculations of the rate of interest contracted for, charged or
received for the account of any Bank under the Note held by it, under this
Agreement, under any other agreement executed in connection herewith or
otherwise in connection with the Loans or the Commitment of such Bank for the
purpose of determining whether such rate exceeds the maximum nonusurious
interest rate applicable to such Bank, shall be made, to the extent permitted
by usury laws applicable to such Bank (now or hereafter enacted), by
amortizing, prorating and spreading in equal parts during the period of the
full stated terms of the Loans evidenced by such Note all interest at any time
contracted for, charged or received by such Bank in connection therewith.

                 (f)      To the extent that any Bank may be subject to Texas
law limiting the amount of interest payable for its account, such Bank shall
utilize the indicated (weekly) rate ceiling from time to time in effect as
provided in Article 5069-1.04 of the Revised Civil Statutes of Texas, as
amended.

         SECTION 2.17.  Taxes. (a)  Any and all payments by the Company
hereunder or under the Notes shall be made, in accordance with Section 2.12,
free and clear of and without deduction for any and all present or future
taxes, levies, imposts, deductions, charges and withholdings, and all
liabilities with respect thereto, excluding (i) in the case of the Agent, each
Co-Agent and each Bank, United States federal income taxes and, without
duplication, any taxes imposed on its income, and franchise taxes imposed on
it, by the jurisdiction under the laws of which the Agent, such Co-Agent or
such Bank, as the case may be, is organized or any political subdivision
thereof and (ii) in the case of each Bank, taxes imposed on its income, and
franchise taxes imposed on it, by the jurisdiction of such Bank's Applicable
Lending Office or any political subdivision thereof (all such non-excluded
taxes, levies, imposts, deductions, charges, withholdings and liabilities being
hereinafter referred to as "Taxes").  If the Company shall be required by law
to deduct any Taxes from or in respect of any sum payable hereunder or under
any Note to any Bank, any Co-Agent or the 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
2.17) such Bank, such Co-Agent or the Agent (as the case may be) receives an
amount equal to the sum it would have received had no such deductions been
made, (ii) the Company shall make such deductions and (iii) the Company shall
pay the full





                                      -44-
<PAGE>   50
amount deducted to the relevant taxation authority or other authority in
accordance with applicable law.

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

                 (c)      The Company will indemnify each Bank, each Co-Agent
and the Agent for the full amount of Taxes and Other Taxes (including, without
limitation, any Taxes or Other Taxes imposed by any jurisdiction on amounts
payable under this Section 2.17) paid by such Bank, such Co-Agent or the Agent
(as the case may be) and any liability (including penalties, interest and
expenses) arising therefrom or with respect thereto, whether or not such Taxes
or Other Taxes were correctly or legally asserted.  Payments under any
indemnification provided for in this Section 2.17(c) shall be made within 30
days from the date such Bank, such Co-Agent or the Agent (as the case may be)
makes written demand therefor.

                 (d)      Within 30 days after the date of any payment of
Taxes, the Company will furnish to the Agent, at its address referred to in
Section 9.01, the original or a certified copy of a receipt evidencing payment
thereof.  Should any Bank, any Co-Agent or the Agent ever receive any refund,
credit or deduction from any taxing authority to which such Bank, such Co-Agent
or the Agent, as the case may be, would not be entitled but for the payment by
the Company of Taxes as required by this Section 2.17 (it being understood that
the decision as to whether or not to claim, and if claimed, as to the amount of
any such refund, credit or deduction shall be made by such Bank, such Co-Agent
or the Agent, as the case may be, in its sole discretion), such Bank, such
Co-Agent or the Agent, as the case may be, thereupon shall repay to the Company
an amount with respect to such refund, credit or deduction equal to any net
reduction in taxes actually obtained by such Bank, such Co-Agent or the Agent,
as the case may be, and reasonably determined by such Bank, such Co-Agent or
the Agent, as the case may be, to be attributable to such refund, credit or
deduction.

                 (e)      Each Bank represents that it is either (i) a
corporation, association or other entity organized under the laws of the United
States or any state thereof or (ii) entitled to complete exemption from United
States withholding tax imposed on or with respect to any payments, including
fees, to be made to it pursuant to this Agreement or the Notes.  Each Bank that
is not organized under the laws of the United States or any state thereof (a
"Foreign Bank") agrees to provide to the Company and the Agent, on or prior to
the date of this Agreement in the case of each Foreign Bank signatory hereto,
and on the date of the Assignment pursuant to which it became a Bank in the
case of each other Foreign Bank, two duly completed copies of United States
Internal Revenue Service Form 1001 or 4224, certifying in either case that such
Foreign Bank is entitled to receive payments from the Company under this
Agreement and the Notes





                                      -45-
<PAGE>   51
without deduction or withholding of any United States federal income taxes.
Each Foreign Bank which so delivers a Form 1001 or 4224 further undertakes to
deliver to each of the Company and the Agent two additional copies of such form
(or a successor form) on or before the date that such form expires or becomes
obsolete or after the occurrence of any event requiring a change in the most
recent form so delivered by it, and such amendments thereto or extensions or
renewals thereof as may be reasonably requested by the Company or the Agent, in
each case certifying that such Foreign Bank is entitled to receive payments
from the Company under this Agreement and the Notes without deduction or
withholding of any United States federal income taxes, unless an event
(including without limitation any change in treaty, law or regulation) has
occurred prior to the date on which any such delivery would otherwise be
required which renders all such forms inapplicable or which would prevent such
Foreign Bank from duly completing and delivering any such form with respect to
it and such Foreign Bank advises the Company and the Agent that it is not
capable of receiving such payments without any deduction or withholding of
United States federal income tax.  Each Bank agrees to indemnify and hold the
Company and the Agent harmless from any United States taxes, penalties,
interest and other expenses, costs and losses incurred or payable by them as a
result of either (a) such Bank's failure to submit any form that it is required
to provide pursuant to this Section 2.17(e) or (b) the Agent's and the
Company's reliance on any such form which such Bank has provided to them, or on
the representation of such Bank made to them pursuant to this Section 2.17(e).

                 (f)      If any Taxes are paid by the Company pursuant to this
Section 2.17 in respect of the Applicable Lending Office of any Bank, such Bank
will, if requested to do so by the Company, designate a different Applicable
Lending Office if such designation will avoid the need to pay, or reduce the
amount of, such Taxes and will not, in the judgment of such Bank, be otherwise
disadvantageous to such Bank.

                 SECTION 2.18.  Conversions.  (a)  The Company may on any
Sterling Business Day, upon notice given to the Agent no later than 10:00 a.m.
(Houston time) on the third Sterling Business Day prior to the date of the
proposed Conversion and subject to the provisions of Section 2.02 and Article
VIII and the other provisions hereof, Convert all Committed Loans comprising
one or more Borrowings; provided, that (i) Loans comprising a Borrowing may not
be Converted if after giving effect to such Conversion, such Borrowing would be
(A) a Euro-Dollar Borrowing and the outstanding principal amount of such
Borrowing would be less than $10,000,000 or (B) a Sterling Borrowing and the
outstanding principal amount of such Sterling Borrowing would be less than the
lesser of L.5,000,000 and $10,000,000 (based on the Current Dollar Amount of
the Sterling Loans comprising such Sterling Borrowing then in effect), and (ii)
no Conversion (other than changing Euro-Dollar Loans or Sterling Loans into
Base Rate Loans) may be made if any Event of Default is then existing.  Each
such notice of a Conversion shall, within the restrictions specified above,
specify (i) the date of such Conversion, (ii) the Loans to be Converted, (iii)
if after giving effect to such Conversion, such Borrowing would be a
Euro-Dollar Borrowing or a Sterling Borrowing, the commencement date and
duration of the proposed Interest





                                      -46-
<PAGE>   52
Period for each Loan comprising such Borrowing, and (iv) the nature of such
Conversion (i.e., whether such Conversion is a change of Committed Loans of one
Type into another Type, a continuation of Euro-Dollar Loans or Sterling Loans
as such for an additional Interest Period or an election to change an Interest
Period).  Each such notice shall be irrevocable.

                 (b)      If the aggregate unpaid principal amount of
Euro-Dollar Loans comprising any Borrowing shall be reduced by payment or
prepayment or otherwise, to less than $10,000,000, such Loans shall
automatically, on the last day of the then existing Interest Period therefor,
Convert into Base Rate Loans.

                 (c)      If the Company shall fail (whether as a result of the
proviso to the first sentence of Section 2.18(a) or otherwise) to select the
duration of any Interest Period for any Euro-Dollar Loans or Sterling Loans in
accordance with the provisions contained in the definition herein of "Interest
Period", or if there shall be any Event of Default, such Loans will
automatically on the last day of the then existing Interest Period therefor,
Convert into Base Rate Loans.

                 SECTION 2.19.  Sterling Loans.  (a) At or before 11:00 A.M.
(London time) two Sterling Business Days before each Adjustment Date or as soon
thereafter as practicable, each Reference Bank agrees to use its best efforts
to furnish to the Agent the information contemplated by the definition herein
of "Current Exchange Rate".  Promptly thereafter and in any event by 4:00 P.M.
(London time) or as soon thereafter as practicable (subject to the last
sentence of this Section 2.19(a)), the Agent shall determine the Current
Exchange Rate and the Current Dollar Amount of each Sterling Loan.  All
determinations of any Current Exchange Rate or any Current Dollar Amount from
time to time shall be made by the Agent, which determinations shall be
conclusive in the absence of manifest error, and the Agent shall give prompt
notice to the Banks and the Company of each such determination.  If any
Reference Bank does not furnish a timely quotation, the Agent shall determine
the relevant Current Exchange Rate and Current Dollar Amounts on the basis of
the information furnished by the remaining Reference Bank or Banks or, if no
such information is available on a timely basis, the then existing Current
Exchange Rate shall continue to apply and the provisions of Section 8.01(b)
shall apply.

                 (b)      The Company expressly agrees that all payments of
principal of and interest on Sterling Loans shall be made in Sterling.

                 (c)      If (i) on any date on which a Notice of Committed
Borrowing or notice of Conversion is given by the Company to the Agent, the
aggregate outstanding principal amount of the Loans plus the principal amount
of any new Borrowing (in the case of outstanding Sterling Loans and in the case
of any new Sterling Borrowing, such principal amounts being the Current Dollar
Amounts thereof as of the date such notice is given) would not exceed the
aggregate amount of the Commitments, and (ii) upon recalculation of the Current
Dollar Amounts prior to such new Borrowing or





                                      -47-
<PAGE>   53
Conversion, as the case may be, as contemplated by Section 2.19(a) and the
relevant definitions herein, the aggregate outstanding principal amount of the
Loans plus the principal amount of any new Borrowing (in the case of
outstanding Sterling Loans and in the case of any new Sterling Borrowing, such
principal amounts being the Current Dollar Amounts thereof immediately
following such recalculation) would exceed the aggregate amount of the
Commitments, then (x) if such excess is equal to or greater than $1,000,000,
the requested amount of such new Borrowing or Conversion shall be deemed to be
decreased by the amount of such excess (with such decrease being applied to
each of the Banks ratably based on their respective Commitments), and (y) if
such excess is less than $1,000,000, the requested amount of such new Borrowing
or Conversion shall not be decreased and such excess shall be a "Permitted
Excess" applicable to such Sterling Borrowing.


                                  ARTICLE III

                                   CONDITIONS

                 SECTION 3.01.  Initial Borrowing.  The obligation of any Bank
to make a Loan on the occasion of the initial Borrowing on or after the date of
this Agreement is subject to the satisfaction (or waiver in accordance with
Section 9.05) of each of the following conditions:

                 (a)      receipt by the Agent of counterparts hereof signed by
         each of the parties hereto (or, in the case of any party as to which
         an executed counterpart shall not have been received, receipt by the
         Agent in form satisfactory to it of telegraphic, telex or other
         written confirmation from such party of execution of a counterpart
         hereof by such party);

                 (b)      receipt by the Agent for the account of each Bank of
         a duly executed Note of the Company dated on the date of this
         Agreement complying with the provisions of Section 2.05;

                 (c)      receipt by the Agent of an opinion of Newton W.
         Wilson, III, General Counsel of the Company, substantially in the form
         of Exhibit F hereto;

                 (d)      receipt by the Agent of an opinion of Andrews & Kurth
         L.L.P., special counsel for the Company, substantially in the form of
         Exhibit G hereto;

                 (e)      receipt by the Agent of an opinion of Bracewell &
         Patterson, L.L.P., special counsel for the Agent, substantially in the
         form of Exhibit H hereto;





                                      -48-
<PAGE>   54
                 (f)      receipt by the Agent of all documents it may
         reasonably request relating to the existence of the Company, the
         corporate authority for and the validity of each of the Financing
         Documents, and any other matters relevant thereto, all in form and
         substance satisfactory to the Agent;

                 (g)      receipt by the Agent of a certificate of an officer
         of the Company stating the rating by S&P and Moody's of all senior
         unsecured long-term debt of the Company as in effect on the date of
         this Agreement; and

                 (h)      receipt by the Agent of a certificate of the chief
         financial officer, the chief accounting officer or the treasurer of
         the Company certifying, as of the date of this Agreement, that no
         Default exists.

                 SECTION 3.02.  All Borrowings.  The obligation of any Bank to
make a Loan on the occasion of any Borrowing is subject to the satisfaction of
the following conditions (in addition to the conditions set forth in Section
3.01):

                 (a)      receipt by the Agent of a Notice of Borrowing as
         required by Section 2.02 or 2.03, as the case may be;

                 (b)      the fact that, immediately after such Borrowing, the
         aggregate outstanding principal amount of the Loans (in the case of
         Sterling Loans, such principal amount being the Current Dollar Amounts
         of such Sterling Loans in effect as of the date of such Borrowing)
         will not exceed the aggregate amount of the Commitments plus the
         Permitted Excess, if any, applicable to such Borrowing in accordance
         with Section 2.19(c);

                 (c)      the fact that immediately prior to and immediately
         after such Borrowing, no Default shall have occurred and be
         continuing; and

                 (d)      the fact that the representations and warranties of
         the Company contained in this Agreement (except, in the case of any
         Borrowing subsequent to the first Borrowing on or after the date of
         this Agreement, the representations and warranties set forth in
         Section 4.04(a) or (c)) shall be true and correct in all material
         respects on and as of the date of such Borrowing.

Each Borrowing hereunder shall be deemed to be a representation and warranty by
the Company on the date of such Borrowing as to the facts specified in this
Section.





                                      -49-
<PAGE>   55
                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES

                 The Company represents and warrants that:

                 SECTION 4.01.  Corporate Existence and Power.  The Company is
a corporation duly incorporated, validly existing and in good standing under
the laws of its jurisdiction of incorporation, and has all corporate powers and
all material governmental licenses, authorizations, consents and approvals
required to own its assets and to carry on its business as now conducted and is
duly qualified as a foreign corporation in good standing in each jurisdiction
where the nature of its business or the ownership or leasing of its properties
requires such qualification and where the failure so to qualify could have a
material adverse effect on the business, financial position, results of
operations or prospects of the Company and its Subsidiaries, taken as a whole.
Neither the Company nor any Subsidiary or Affiliate is subject to regulation
under the Public Utility Holding Company Act of 1935, the Investment Company
Act of 1940, the Interstate Commerce Act or any other law or regulation which
limits the incurrence by the Company or any Subsidiary of Debt, including, but
not limited to, laws relating to common or contract carriers or the sale of
electricity, gas, steam, water or other public utility services.

                 SECTION 4.02.  Corporate and Governmental Authorization;
Contravention.  The execution, delivery and performance by the Company of each
Financing Document to which it is shown as being a party are within the
Company's corporate powers, have been duly authorized by all necessary
corporate action, and do not contravene, or constitute a default under, any
provision of applicable law or regulation (including, without limitation,
Regulations G, T, U and X of the Board of Governors of the Federal Reserve
System) or the certificate of incorporation, by-laws or other charter documents
of the Company or of any instrument or agreement evidencing or governing Debt
or any other material agreement, judgment, injunction, order, decree or other
instrument binding upon the Company or result in the creation or imposition of
any material Lien on any asset of the Company or any Subsidiary.  All
authorizations, consents and approvals of governmental bodies, agencies or
officials required in connection with the execution, delivery and performance
by the Company of the Financing Documents to which it is shown as being a party
have been obtained and are in full force and effect.

                 SECTION 4.03.  Binding Effect.  This Agreement and each of the
Notes have been duly executed and delivered by the Company and constitute
legal, valid and binding agreements of the Company.





                                      -50-
<PAGE>   56
                 SECTION 4.04.  Information.

                 (a)      The consolidated balance sheet of the Company and its
Consolidated Subsidiaries as of December 31, 1995 and the related consolidated
statements of operations, cash flows and common stock and other shareholders'
equity for the fiscal year then ended, reported on by Price Waterhouse LLP and
set forth in the Company's 1995 Form 10-K, a copy of which has been delivered
to each of the Banks, fairly present, in conformity with generally accepted
accounting principles, the consolidated financial position of the Company and
its Consolidated Subsidiaries as of such date and their consolidated results of
operations and cash flows for such fiscal year.

                 (b)      To the best knowledge of the Company, there are no
statements or conclusions in any Engineering Report delivered pursuant hereto
which are based upon or include misleading information or fail to take into
account material information regarding the matters reported therein, it being
understood that such statements and conclusions are necessarily based upon
professional opinions, estimates and forecasts, and the Company does not
warrant that such opinions, estimates and forecasts will ultimately prove to
have been accurate.

                 (c)      The Company's 1995 Form 10-K does not contain any
untrue statement of material fact or omit to state a material fact necessary in
order to make the statements contained therein not misleading as of the date
thereof.  Except for matters of general public knowledge with respect to the
oil and gas industry, the Company has disclosed to the Banks in writing any and
all facts which materially and adversely affect or may be reasonably expected
so to affect (to the extent the Company can now reasonably foresee), the
business, assets, operations, prospects or condition, financial or otherwise,
of the Company and its Subsidiaries or the ability of the Company to perform
its obligations under the Financing Documents.

                 (d)      Since December 31, 1995 there has been no material
adverse change in the business, financial position, results of operations or
prospects of the Company and its Subsidiaries, taken as a whole.

                 (e)      No Default exists.

                 SECTION 4.05.  Litigation.  There is no action, suit or
proceeding pending against, or to the knowledge of the Company threatened
against or affecting, the Company or any of its Subsidiaries or any of their
respective properties or interests at law or in admiralty or equity, before any
court or arbitrator or any governmental body, agency or official, foreign or
domestic, in which there is a reasonable possibility of an adverse decision
which could materially adversely affect the business, financial position or
results of operations of the Company and its Subsidiaries, taken as a whole, or
which in any manner draws into question the validity of any Financing Document.





                                      -51-
<PAGE>   57
                 SECTION 4.06.  Compliance with ERISA.  Each member of the
ERISA Group has fulfilled its obligations under the minimum funding standards
of ERISA and the Internal Revenue Code with respect to each Plan and is in
compliance in all material respects with the presently applicable provisions of
ERISA and the Internal Revenue Code with respect to each Plan.  No member of
the ERISA Group has (i) sought a waiver of the minimum funding standard under
Section 412 of the Internal Revenue Code in respect of any Plan, (ii) failed to
make any contribution or payment to any Plan or Multiemployer Plan or in
respect of any Benefit Arrangement, or made any amendment to any Plan or
Benefit Arrangement, which has resulted or could result in the imposition of a
Lien or the posting of a bond or other security under ERISA or the Internal
Revenue Code or (iii) incurred any liability under Title IV of ERISA other than
a liability to the PBGC for premiums under Section 4007 of ERISA.

                 SECTION 4.07.  Environmental Matters.  In the ordinary course
of its business, the Company conducts an ongoing review of the effect of
existing Environmental Laws on the business, operations and properties of the
Company and the Subsidiaries, in the course of which it attempts to identify
and evaluate 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, the Company has reasonably concluded
that existing Environmental Laws are unlikely to have a material adverse effect
on the business, financial condition, results of operations or prospects of the
Company and its Subsidiaries, taken as a whole.

                 SECTION 4.08.  Subsidiaries.  All Restricted Assets are owned
as of the date of this Agreement by the Company and the Persons listed in Part
B of Schedule II hereto or, in the case of Restricted Assets sold since
December 31, 1993, by Persons other than Unrestricted Subsidiaries.  Part A of
Schedule II hereto contains a true, complete and accurate list of all
Unrestricted Subsidiaries, and Part B of Schedule II hereto contains a true,
complete and accurate list of all Restricted Subsidiaries as of the date of
this Agreement.

                 SECTION 4.09.  Ownership of Restricted Subsidiaries. The
Company or a Restricted Subsidiary is the record and beneficial owner, free and
clear of all Liens (other than those permitted by Section 5.07), of (i) all of
the issued and outstanding capital stock (other than directors' qualifying
shares and shares beneficially owned by the Company or a Restricted Subsidiary
and held by nominees of the Company or a Restricted Subsidiary solely to
satisfy requirements of local law) and other ownership interests of each
Restricted Subsidiary (except Unimar and the Unimar Restricted Subsidiaries and
any other Restricted Subsidiary the capital stock of which is sold





                                      -52-
<PAGE>   58
pursuant to a sale permitted by Section 5.14) and (ii) except during any period
during which Unimar is an Unrestricted Subsidiary or ceases to be a Subsidiary,
at least 50% of the ownership interest in Unimar and the Unimar Restricted
Subsidiaries.  Except as disclosed on Schedule VI, there are no outstanding
options, warrants or other rights to acquire any capital stock or other
ownership interest of any Restricted Subsidiary.

                 SECTION 4.10.  Title to Properties.  The Company and each of
the Subsidiaries have good title, free and clear of all Liens, claims, burdens
and title defects, to all of the material assets reflected in the Company's or
such Subsidiary's books and records as being owned by them except Liens
permitted by this Agreement and claims, burdens and title defects not
materially adverse in the aggregate.

                 SECTION 4.11.  Taxes and Other Obligations.  Consolidated
United States Federal income tax returns of the Company and the Subsidiaries
have been examined by the Internal Revenue Service, or the statutory period for
such examination has expired, for all years up to and including the year ended
December 31, 1989, and all assessed deficiencies resulting from such
examination have been discharged or reserved against as required by generally
accepted accounting principles.  The Company and the Subsidiaries have filed
all United States Federal, state and local income tax returns and all other
material domestic tax returns which are required to be filed by them and have
paid, or provided for the payment before the same became delinquent of, all
taxes due pursuant to such returns or pursuant to any assessment received by
the Company or any Subsidiary, other than those taxes being diligently
contested in good faith by appropriate proceedings.  The charges, accruals and
reserves on the books of the Company and the Subsidiaries in respect of taxes
are, in the opinion of the Company, adequate.  The Company and the Subsidiaries
have set up such reserves as are required by generally accepted accounting
principles for the payment of additional taxes for years which have not been
audited by the respective tax authorities.  The Company and the Subsidiaries
have paid all other material obligations when due other than those being
contested in good faith by appropriate proceedings.

                 SECTION 4.12.  Regulation U.  Neither the Company  nor any
Subsidiary is engaged in the business of extending credit for the purpose of
purchasing or carrying margin stock (within the meaning of Regulation G) or
margin stock (within the meaning of Regulation U).  Following the application
of the proceeds of each Loan, not more than 25% of the value of the assets of
the Company, or of the Company and its Subsidiaries, which are subject to any
arrangement with the Agent or any Bank (herein or otherwise) whereby the
Company's or any Subsidiary's right or ability to sell, pledge or otherwise
dispose of assets is in any way restricted will be any such margin stock.

                 SECTION 4.13.  Certain Obligations.  Neither the Company nor
any Subsidiary has any obligation to make payments on the Joint Venture Debt
other than those permitted by Section 5.17.  The only Non-Recourse Debt
existing on the date of this Agreement is the Existing Pakistan Non-Recourse
Debt.





                                      -53-
<PAGE>   59
                 SECTION 4.14.  United Kingdom Assets.  Substantially all of
the Restricted Assets located in the United Kingdom (including the United
Kingdom Sector of the North Sea) are directly owned by UTPL as of the date of
this Agreement.


                                   ARTICLE V

                                   COVENANTS

                 The Company agrees that, so long as any Bank has any
Commitment hereunder or any amount payable under any Note remains unpaid:

                 SECTION 5.01.  Information.  The Company will deliver to each
of the Banks:

                 (a)      as soon as available and in any event within 100 days
         after the end of each fiscal year of the Company, a consolidated
         balance sheet of the Company and its Consolidated Subsidiaries as of
         the end of such fiscal year and the related consolidated statements of
         operations, cash flows and common stock and other shareholders' equity
         for such fiscal year, setting forth in each case in comparative form
         the figures for the previous fiscal year, all reported on in a manner
         acceptable to the Securities and Exchange Commission by Price
         Waterhouse LLP or other independent public accountants of nationally
         recognized standing;

                 (b)      as soon as available and in any event within 60 days
         after the end of each of the first three quarters of each fiscal year
         of the Company, a consolidated balance sheet of the Company and its
         Consolidated Subsidiaries as of the end of such quarter and the
         related consolidated statements of operations and cash flows for such
         quarter and for the portion of the Company's fiscal year ended at the
         end of such quarter, setting forth in each case in comparative form
         the figures for the corresponding quarter and the corresponding
         portion of the Company's previous fiscal year, all certified (subject
         to normal year-end adjustments) as to preparation in accordance with
         generally accepted accounting principles and consistency by the chief
         financial officer, the chief accounting officer or the treasurer of
         the Company;

                 (c)      simultaneously with the delivery of each set of
         financial statements referred to in clauses (a) and (b) above, a
         certificate of the chief financial officer, the chief accounting
         officer or the treasurer of the Company (i) setting forth in
         reasonable detail the calculations required to establish whether the
         Company was in compliance with the requirements of Sections 5.05 and
         5.15 on the date of such financial statements and (ii) stating whether
         any Default exists on the date of such certificate and, if any Default
         then exists, setting forth





                                      -54-
<PAGE>   60
         the details thereof and the action which the Company and its
         Subsidiaries are taking or propose to take with respect thereto;

                 (d)      as soon as available and in any event within 60 days
         after the end of each fiscal quarter of the Company, a certificate of
         the chief financial officer, the chief accounting officer or the
         treasurer of the Company certifying (i) the rating (or lack of a
         rating thereof) by each of S&P and Moody's on the senior unsecured
         long-term debt of the Company on the date of such certificate, (ii)
         the Unimar Percentage as of the end of such quarter and the amounts as
         of the end of such quarter of Consolidated Debt, Defeased Debt,
         Excluded Subordinated Debt, Debt of the Company and its Consolidated
         Subsidiaries determined on a consolidated basis, Debt of the Company
         and the Restricted Subsidiaries determined on a consolidated basis,
         Debt of Unimar, Debt of Unrestricted Subsidiaries, Excess Letter of
         Credit/Guarantee Amount, Non-Restricted Asset Non-Recourse Debt,
         Non-Recourse Debt of the Company and the Restricted Subsidiaries, and
         Restricted Subsidiaries Recourse Debt, and (iii) each Asset Sale that
         has been consummated during such quarter, the Fair Market Value of the
         Restricted Assets subject thereto, the amount of fees, commissions,
         expenses and taxes related thereto, the Net Sales Proceeds therefrom
         and the cumulative amount of the Excess Net Sales Proceeds from all
         Assets Sales since December 31, 1993;

                 (e)      within five days after the chief financial officer,
         the chief accounting officer or treasurer of the Company obtains
         knowledge of any Default, if such Default is then continuing, a
         certificate of the chief financial officer, the chief accounting
         officer or the treasurer of the Company setting forth the details
         thereof and the action which the Company and its Subsidiaries are
         taking or propose to take with respect thereto;

                 (f)      immediately upon the filing of, or any material
         development in, any litigation or the occurrence of any other event or
         contingency, if such development, litigation, event or contingency
         could reasonably be expected to have a material adverse effect on the
         business, assets, operations, prospects or condition, financial or
         otherwise, of the Company and its Subsidiaries, taken as a whole, a
         certificate of the chief financial officer, the chief accounting
         officer or the treasurer of the Company setting forth the details of
         such development, litigation, event or contingency and the action
         which the Company and its Subsidiaries are taking or propose to take
         with respect thereto;

                 (g)      as soon as available and in any event within 100 days
         after the end of each fiscal year of each Restricted Subsidiary (other
         than the Unimar Restricted Subsidiaries), a consolidated balance sheet
         of such Restricted Subsidiary and its consolidated subsidiaries as of
         the end of such fiscal year and the related consolidated statements of
         operations, cash flows and common stock and other shareholders' equity
         for such fiscal year, setting forth in each case in





                                      -55-
<PAGE>   61
         comparative form the figures for the previous fiscal year, all
         certified as to preparation in accordance with generally accepted
         accounting principles and consistency by the chief financial officer,
         the chief accounting officer or the treasurer of such Restricted
         Subsidiary;

                 (h)      as soon as available and in any event within 60 days
         after the end of the first three quarters of each fiscal year of each
         Restricted Subsidiary (other than the Unimar Restricted Subsidiaries,
         Union Texas Petroleum Energy Corporation and Union Texas International
         Corporation), a consolidated balance sheet of such Restricted
         Subsidiary and its consolidated subsidiaries as of the end of such
         quarter and the related consolidated statements of operations and cash
         flows for such quarter and for the portion of such Restricted
         Subsidiary's fiscal year ended at the end of such quarter, setting
         forth in each case in comparative form the figures for the
         corresponding quarter and the corresponding portion of such Restricted
         Subsidiary's previous fiscal year, all certified (subject to normal
         year-end adjustments) as to preparation in accordance with generally
         accepted accounting principles and consistency by the chief financial
         officer, the chief accounting officer or the treasurer of such
         Restricted Subsidiary;

                 (i)      promptly upon the mailing thereof to the shareholders
         of the Company generally, copies of all financial statements, reports
         and proxy statements so mailed;

                 (j)      promptly upon the filing thereof, copies of all
         registration statements (other than the exhibits thereto and any
         registration statements on Form S-8 or its equivalent) and reports on
         Forms 10-K, 10-Q and 8-K (or their equivalents) which the Company
         shall have filed with the Securities and Exchange Commission;

                 (k)      at least 45 days prior to the closing of each Asset
         Sale that will result in aggregate Net Sales Proceeds (for such sale
         or, if such sale is one of a series of related sales, for all sales
         and contemplated sales in such series) of $50,000,000 or more, notice
         of such sale describing the assets to be sold and the estimated Net
         Sales Proceeds thereof;

                 (l)      if and when any member of the ERISA Group (i) gives
         or is required to give notice to the PBGC of any "reportable event"
         (as defined in Section 4043 of ERISA) (other than a "reportable event"
         not subject to the provisions for 30-day notice to the PBGC under the
         regulations issued under Section 4043 of ERISA) with respect to any
         Plan which might constitute grounds for a termination of such Plan
         under Title IV of ERISA, or knows that the plan administrator of any
         Plan has given or is required to give notice of any such reportable
         event, a copy of the notice of such reportable event given or required
         to be given to the PBGC; (ii) receives notice of complete or partial





                                      -56-
<PAGE>   62
         withdrawal liability under Title IV of ERISA or notice that any
         Multiemployer Plan is in reorganization, is insolvent or has been
         terminated, a copy of such notice; (iii) receives notice from the PBGC
         under Title IV of ERISA of an intent to terminate, impose liability
         (other than for premiums under Section 4007 of ERISA) in respect of,
         or appoint a trustee to administer, any Plan, a copy of such notice;
         (iv) applies for a waiver of the minimum funding standard under
         Section 412 of the Internal Revenue Code, a copy of such application;
         (v) gives notice of intent to terminate any Plan under Section 4041(c)
         of ERISA, a copy of such notice and other information filed with the
         PBGC; (vi) gives notice of withdrawal from any Plan pursuant to
         Section 4063 of ERISA, a copy of such notice; or (vii) fails to make
         any payment or contribution to any Plan or Multiemployer Plan or in
         respect of any Benefit Arrangement which has resulted or could result
         in the imposition of a Lien or the posting of a bond or other
         security, a certificate of the chief financial officer, the chief
         accounting officer or the treasurer of the Company setting forth
         details as to such occurrence and action, if any, which the Company or
         applicable member of the ERISA Group is required or proposes to take;

                 (m)      within 5 days after the chief financial officer, the
         treasurer or the controller of the Company has knowledge of any filing
         under Rule 13d of the Securities and Exchange Commission, promulgated
         under the Securities Exchange Act of 1934, as amended, a copy thereof;

                 (n)      within 5 days after receipt by the Company of any
         written agreement of the type referred to in Section 6.01(k)(iii)(c),
         (A) a copy thereof except that (i) if such written agreement has not
         been filed with the Securities and Exchange Commission and is not
         otherwise public information, each Bank as a condition to receiving a
         copy of such written agreement may be required to sign, prior to
         receipt thereof, a confidentiality agreement pursuant to which it
         agrees that it will treat such written agreement in a confidential
         manner until such written agreement otherwise becomes public, except
         for disclosure (a) to counsel for and other advisors, accountants and
         auditors of such Bank, (b) as may be required by statute, decision,
         order, rule, regulation or other law, (c) to regulatory authorities,
         (d) in connection with any litigation involving such written
         agreement, such confidentiality agreement or any of the Financing
         Documents, and (e) in connection with any assignment, prospective
         assignment, sale, prospective sale, participation or prospective
         participation or other transfer or prospective transfer of any of such
         Bank's interests hereunder provided that any such assignee,
         prospective assignee, purchaser, prospective purchaser, participant,
         prospective participant, transferee, or prospective transferee shall
         have entered into a confidentiality agreement for the benefit of the
         Company substantially upon the terms of this Section 5.01(n), and (ii)
         if the Company is contractually prohibited from delivering a copy of
         such written agreement to the Banks, the Company shall not be required
         to deliver such written agreement unless such prohibition has been
         waived, but the Company shall use reasonable





                                      -57-
<PAGE>   63
         efforts to obtain such waiver or if it is a party to such written
         agreement to prevent any such prohibition from being included therein,
         and (B) if the Company is a party to such written agreement, but is
         excused pursuant to clause (A)(ii) of this Section 5.01(n) from
         delivering a copy thereof to the Banks, the Company shall notify the
         Banks of the existence of such written agreement (but not the content
         thereof or other parties thereto), but as a condition to receiving
         such notice the Banks may be required to sign, prior to receipt of
         such notice, a confidentiality agreement conforming to clause (A)(i)
         of this Section 5.01(n);

                 (o)      by May 1 of each year, an Engineering Report as of
         the last day of the immediately preceding year;

                 (p)      promptly upon the closing of the sale or other
         disposition of any capital stock of UTPC or any option, warrant or
         other right to acquire any such capital stock, notice thereof;

                 (q)      promptly after any change in or termination of the
         rating of any senior unsecured long-term debt of the Company by S&P or
         Moody's, notice thereof.

                 (r)      from time to time such additional information
         regarding the financial position or business of the Company or any
         Subsidiary as the Agent, at the request of any Bank, may reasonably
         request.

                 SECTION 5.02.  Affirmative Covenants.  The Company will
maintain its existence and cause each Restricted Subsidiary to maintain its
existence except in the case of (i) a merger of a Restricted Subsidiary into
the Company in a merger permitted by Section 5.08 hereof, (ii) the merger of a
Restricted Subsidiary into another Restricted Subsidiary, if immediately after
such merger (and giving effect thereto), no Default shall have occurred and be
continuing, and (iii) any Asset Sale in the form of the merger of a Restricted
Subsidiary into another Person, if immediately after such merger (and giving
effect thereto), no Event of Default shall have occurred and be continuing.
The Company and each Subsidiary shall:

                 (a)      Conduct of Business; Property.  Cause all material
         property useful and necessary in its business to be maintained in good
         working order and condition and to be operated prudently in accordance
         with good industry practice; and to the extent consistent with prudent
         business practices, defend its right, title and interest in its
         material properties against all adverse claims.

                 (b)      Compliance with Laws.  Comply with all applicable
         laws, ordinances, rules, regulations and reporting, filing and other
         requirements of governmental authorities (including, without
         limitation, Environmental Laws and ERISA and the rules and regulations
         thereunder), except where





                                      -58-
<PAGE>   64
         the necessity of compliance therewith is contested in good faith by
         appropriate proceedings or where the failure to so comply would not
         have a material adverse effect on the Company and its Subsidiaries,
         taken as a whole.

                 (c)      Inspection of Property, Books and Records.  Keep
         proper books of record and account in accordance with sound accounting
         practices; and permit representatives of any Bank, at such Bank's sole
         risk and expense, to visit and inspect any of its properties (subject
         to obtaining any required consent of third-party operators), to
         examine and make abstracts and copies from any of its books and
         records and to discuss its affairs, finances and accounts with its
         officers and employees, and use its best efforts to make its
         independent public accountants available to discuss the affairs,
         finances and accounts of the Company and any of its Subsidiaries, all
         at such reasonable times and as often as may reasonably be desired.

                 SECTION 5.03.  Primary Business.  The exploration for, and
production and marketing of, Hydrocarbons will continue to be the primary
business of the Company and its Subsidiaries taken as whole.

                 SECTION 5.04.  Insurance.  The Company will maintain, and will
cause each Subsidiary to maintain (either in the name of the Company or in such
Subsidiary's own name) with financially sound and reputable insurance
companies, insurance on their property in at least such amounts and against at
least such risks as are usually insured against in the same general area by
companies of established repute engaged in the same or similar business; and
will furnish to the Banks, upon written request from the Agent, full
information as to the insurance carried.

                 SECTION 5.05.  Debt.  (a) At no time will Restricted
Subsidiaries Recourse Debt exceed $75,000,000.

         (b)     Consolidated Debt will not, on the last day of any calendar
quarter, exceed 3.75 times Operating Cash Flow for the four calendar quarters
ending on such day.

         (c)     Neither the Company nor any Restricted Subsidiary will create,
assume or otherwise incur any Debt if at the time of creation, assumption or
incurrence of such Debt or after giving effect to the creation, assumption or
incurrence of such Debt, any Event of Default would exist; provided that the
Company or any Restricted Subsidiary may renew or extend (but not increase) its
own Debt.

                 SECTION 5.06.  Restricted Payments.  Neither the Company nor
any Subsidiary shall declare or make any Restricted Payment unless, immediately
prior thereto and immediately thereafter, no Event of Default shall have
occurred and be





                                      -59-
<PAGE>   65
continuing.  Neither the Company nor any Subsidiary shall make any Restricted
Transfer unless, immediately prior thereto and immediately thereafter, no Event
of Default shall have occurred and be continuing, provided that the Company or
any Subsidiary can make Restricted Transfers in the form of Investments in an
Affiliate, Unrestricted Subsidiary or subsidiary of an Unrestricted Subsidiary
if (i) such Affiliate, Unrestricted Subsidiary or subsidiary, as the case may
be, has no outstanding Debt at the time of such Investment and does not
thereafter create, assume or otherwise incur any Debt while any Event of
Default is continuing and (ii) the Company notifies the Banks of any such
Investment in excess of $5,000,000 at least ten days prior to such Investment.
Nothing in this Section shall prohibit the payment of any dividend or
distribution within 45 days after the declaration thereof if payment of such
dividend or distribution was not prohibited by this Agreement at the time such
declaration was made.

                 SECTION 5.07.  Negative Pledge.  Neither the Company nor any
Restricted Subsidiary will create, assume or suffer to exist (i) any Lien on
any capital stock or other ownership interest of any Restricted Subsidiary now
owned or hereafter acquired by it or any Lien on any option, warrant or other
right to acquire any capital stock or other ownership interest of any
Restricted Subsidiary now owned or hereafter acquired by it, other than those
described in Part A of Schedule III or (ii) any Lien on any other asset now
owned or hereafter acquired by it, except for the following Liens on assets not
referred to in the foregoing clause (i) of this Section:

                 (a)      Liens existing on the date of this Agreement,
         securing Debt outstanding and other obligations (including contractual
         obligations) existing on the date of this Agreement and, except in the
         case of inchoate operator's Liens, described in Part B of Schedule III
         hereto;

                 (b)      any Lien (i) on any Non-Restricted Asset securing
         only Non-Restricted Asset Non-Recourse Debt of the Company or any
         Restricted Subsidiary or (ii) on any asset of Virginia Indonesia
         Company, Virginia International Company or Union Texas East Kalimantan
         Limited securing Joint Venture Debt;

                 (c)      mechanics', materialmen's, carriers' and other
         statutory Liens, but only if arising, and only so long as continuing,
         in the ordinary course of business; or deposits or pledges to obtain
         the release of any such Lien; or easements, encroachments or other
         title defects which do not materially detract from the value of its
         assets or materially impair the use thereof in the operation of its
         business;

                 (d)      Liens arising in the ordinary course of its business
         which (i) do not secure Debt, (ii) do not secure any obligation in an
         amount exceeding $15,000,000 and (iii) do not in the aggregate
         materially detract from the value of its assets or materially impair
         the use thereof in the operation of its business;





                                      -60-
<PAGE>   66
                 (e)      Liens on any interest in a Partnership arising under
         any agreement creating or governing such Partnership (including
         Unimar) and securing only obligations of the members of such
         Partnership to make Investments in such Partnership;

                 (f)      Liens arising under any customary provision of any
         joint operating agreement or similar agreement relating to the
         exploration, production, development or transportation of oil and gas;

                 (g)      Liens not otherwise permitted by the foregoing
         clauses of this Section on assets (other than any of the Restricted
         Assets) securing Debt in an aggregate principal amount at any time
         outstanding not to exceed $20,000,000;

                 (h)      any Lien securing the refinancing, extension, renewal
         or refunding of any Debt secured by any Lien permitted by the
         foregoing subsection (a) of this Section, provided that such Debt is
         not increased from the lesser of the amount of such Debt set forth on
         Schedule III hereto or the amount of such Debt outstanding immediately
         prior to such refinancing, extension, renewal or refunding, and such
         Lien does not cover any property that is not described on Schedule III
         hereto as securing such Debt; and

                 (i)      Liens in favor of third parties on cash, treasury
         securities and other property deposited in margin accounts relating
         to, or otherwise delivered as collateral for any obligation of the
         Company or any Subsidiary under, any contract of the Company or any
         Subsidiary evidencing any Derivative Transaction or other hedge
         obligation; provided, that the aggregate Fair Market Value of all such
         cash, treasury securities and other property subject to such Liens
         shall not exceed from time to time $15,000,000.

                 SECTION 5.08.  Consolidations and Mergers.  The Company will
not consolidate or merge with or into any Person, provided that the Company may
merge with another Person if the Company is the surviving corporation and,
immediately after such merger (and giving effect thereto), no Default shall
have occurred and be continuing.

                 SECTION 5.09.  Use of Proceeds.  The proceeds of the Loans
made under this Agreement will be used by the Company for general corporate
purposes; provided that none of such proceeds will be used in any manner or for
any purpose that results in any violation of any applicable law or regulation
(including, without limitation, Regulations G, T, U and X of the Board of
Governors of the Federal Reserve System).

                 SECTION 5.10.  Addition of Guarantors.  If any Subsidiary of
the Company Guarantees (i) Debt (other than Funded Debt) of the Company having
an aggregate outstanding balance less than $25,000,000, and any Guarantee of
such Debt





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<PAGE>   67
has not been released or terminated within 60 days of the date of the
incurrence of such obligation or (ii) Debt (other than Debt described in clause
(i) above) of the Company, then the Company shall (a) cause all Loans and all
other amounts payable at any time under any of the Financing Documents,
including, without limitation, interest which accrues during a proceeding which
occurs under the U.S. Bankruptcy Code or which would otherwise accrue under the
terms of any of the Financing Documents, but for a proceeding under the U.S.
Bankruptcy Code, to be equally and ratably guaranteed by such Subsidiary, (b)
cause such Subsidiary to execute and deliver a subsidiary guaranty agreement in
form and substance satisfactory to the Banks, and (c) deliver an opinion of
counsel and officers' certificate to the effect that such subsidiary guaranty
agreement has been duly authorized and executed by such Subsidiary and
constitutes the legal, valid, binding and enforceable obligation of such
Subsidiary, all in form and substance satisfactory to the Banks.  "Funded Debt"
of any Person means at any date, all Debt (including, without limitation, Debt
incurred under any revolving credit, letter of credit or working capital
facility) of such Person that matures by its terms, or that is renewable at the
option of such Person to a date more than one year after the date on which such
Debt is originally incurred.

                 SECTION 5.11.  Restrictions on Dividends, Intercompany Loans,
or Investments.  The Company will not create or otherwise cause or permit to
exist or become effective, or permit any Subsidiary to create or otherwise
cause or permit to exist or become effective, any consensual encumbrance or
restriction (other than the Financing Documents) on the ability of any
Restricted Subsidiary to (i) pay dividends or make any other distributions on
its capital stock or other ownership interests or pay any Debt or other
obligation owed to the Company or any Restricted Subsidiary, or (ii) make any
loans or advances to or other Investments in the Company or any Restricted
Subsidiary, except any encumbrance or restriction in effect on the date of this
Agreement and described on Schedule IV hereto.

                 SECTION 5.12.  Loans and Advances.  The Company will not make
or permit to remain outstanding any cash loan or advance to any Person, or
permit any Restricted Subsidiary to make or permit to remain outstanding any
cash loan or advance to any Person, except (i) loans and advances to
Subsidiaries or joint ventures, partnerships or other business ventures in
which the Company or any Subsidiary has or is contemporaneously acquiring an
interest or participation; and (ii) other loans and advances not exceeding
$10,000,000 at any time outstanding.

                 SECTION 5.13.  Cross-Default.  The Company will not create,
assume, otherwise incur or suffer to exist, or permit any Restricted Subsidiary
to create, assume, otherwise incur or suffer to exist, any Debt if the maturity
of such Debt is or may be accelerated (assuming the giving of notice or lapse
of time or both), in whole or in part, as a result of any default under, or
acceleration of (i) any Non-Recourse Debt of the Company or any Restricted
Subsidiary or (ii) any Debt of any Unrestricted Subsidiary, unless the Required
Banks shall have given their prior written consent to such Debt of the Company
or Restricted Subsidiary to be so created, assumed or otherwise incurred,





                                      -62-
<PAGE>   68
which consent will not be unreasonably withheld; provided that this Section
5.13 shall not prohibit a provision in a Guarantee of the Company or a
Restricted Subsidiary Guaranteeing Debt of an Unrestricted Subsidiary that
provides that the payment obligation under such Guarantee may be accelerated
upon default under or acceleration of such Debt.

                 SECTION 5.14.  Subsidiaries.  The Company will at all times
own, either directly or through one or more Restricted Subsidiaries, free and
clear of all Liens (other than those permitted by Section 5.07), 100% of all
issued and outstanding capital stock (other than directors' qualifying shares
and shares beneficially owned by the Company or a Restricted Subsidiary and
held by nominees of the Company or a Restricted Subsidiary solely to satisfy
requirements of local law) and other ownership interests of each Restricted
Subsidiary and all options, warrants and other rights to acquire any such
capital stock or any such ownership interest, except for (i) Unimar and the
Unimar Restricted Subsidiaries, (ii) any Restricted Subsidiary sold or
otherwise disposed of pursuant to an Asset Sale, if after giving effect to such
Asset Sale, the Company does not own, directly or indirectly, any interest in
such Restricted Subsidiary, and (iii) those options described on Schedule VI.
The Company will at all times own, either directly or through one or more
Restricted Subsidiaries, free and clear of all Liens (other than those
permitted by Section 5.07), 50% or more of the ownership interest in Unimar and
the Unimar Restricted Subsidiaries and all options, warrants and other rights
to acquire any such ownership interest (other than those described on Schedule
VI); provided that the Company and the Restricted Subsidiaries may sell all of
their ownership interest in Unimar and the Unimar Restricted Subsidiaries and
such options, warrants and other rights if, after giving effect to such sale,
the Company does not own, directly or indirectly, any interest in Unimar, the
Unimar Restricted Subsidiaries or any such option, warrant or other right.  The
Company will not at any time permit any Restricted Subsidiary that is not a
Unimar Restricted Subsidiary to become a Unimar Restricted Subsidiary.  The
Company will not permit any Restricted Asset to be sold, leased, transferred or
otherwise disposed of to any Person that was an Unrestricted Subsidiary
immediately prior thereto if any Default then exists or would result.  The
Company will not permit any Restricted Subsidiary to issue any preferred stock
unless such preferred stock at all times is owned only by the Company.  The
Company will not permit any Restricted Subsidiary to own, directly, both (a)
any UK Asset and (b) any Non-UK Asset.

                 SECTION 5.15.  Adjusted Equity and Interest Coverage.  The
Company will at all times maintain Adjusted Equity of $350,000,000 or more.
The Company will cause EBITDA for each period of four consecutive calendar
quarters to exceed 4.00 times Cash Interest Expense for such period.

                 SECTION 5.16.  Excluded Subordinated Debt and Preferred Stock.
Neither the Company nor any Subsidiary will pay, prepay, purchase, redeem,
defease, acquire, exchange or convert any preferred stock (other than
Restricted Preferred Stock)





                                      -63-
<PAGE>   69
or any Excluded Subordinated Debt, except (a) exchanges for or conversions to
common stock of the Company, (b) payments of interest when due required by the
terms of any such Excluded Subordinated Debt as such terms are in effect on the
date such Excluded Subordinated Debt is incurred and (c) if no Event of Default
exists, payments of ordinary periodic dividends (excluding liquidating
dividends) on such preferred stock in accordance with the terms thereof as such
terms are in effect on the date such preferred stock is issued.

                 SECTION 5.17.  Certain Obligations.  Neither the Company nor
any Subsidiary will create, incur, assume or suffer to exist any obligation on
its part to make any payment on the Joint Venture Debt other than (a) the
obligations set forth in the agreements listed on Schedule V hereto with
respect to Joint Venture Debt in existence on the date of this Agreement and
(b) obligations substantially similar to those referred to in clause (a) with
respect to Joint Venture Debt created, incurred, assumed or arising after the
date of this Agreement.

                 SECTION 5.18.  Restrictions on Asset Sales.  (a)  The Company
will not and will not permit any of its Restricted Subsidiaries to enter into
any Asset Sale if after giving effect thereto any Event of Default would exist.

         (b)     The Company will not permit to occur any Asset Sale involving,
directly or indirectly, any UK Assets if the aggregate Net Sales Proceeds of
all Asset Sales involving, directly or indirectly, UK Assets since December 31,
1993 would exceed $250,000,000.

                 SECTION 5.19.  Conversion to Unrestricted Subsidiary.  The
Company may convert a Restricted Subsidiary into an Unrestricted Subsidiary by
giving the Agent notice of such conversion at least 5 Domestic Business Days
prior to such conversion; provided that (i) no Restricted Subsidiary shall be
so converted so long as it owns directly or indirectly any interest in any
Restricted Asset and (ii) no such conversion shall be made if at the time of
such notice or after giving effect to such conversion, any Default would exist.

                                   ARTICLE VI

                                    DEFAULTS

                 SECTION 6.01.  Events of Default.  If one or more of the
following events ("Events of Default") shall have occurred and be continuing:

                 (a)      the Company shall fail to pay when due any principal
         of any Loan, or shall fail to pay within five days of the due date
         thereof any interest on any Loan, any fees or any other amount payable
         hereunder;





                                      -64-
<PAGE>   70
                 (b)      the Company or any Subsidiary shall fail to observe
         or perform any covenant contained in Sections 5.05 to 5.18, inclusive;

                 (c)      the Company or any Subsidiary shall fail to observe
         or perform any covenant or agreement contained in this Agreement
         (other than those covered by clause (a) or (b) above) for 30 days
         after written notice thereof has been given to the Company by the
         Agent at the request of any Bank;

                 (d)      any representation, warranty, certification or
         statement made by the Company or any Subsidiary in this Agreement or
         made in any certificate, financial statement or other document
         delivered pursuant to this Agreement shall prove to have been
         incorrect in any material respect when made (or deemed made);

                 (e)      the Company or any Restricted Subsidiary shall fail
         to make any payment in respect of any Material Debt (other than the
         Notes) when due or within any applicable grace period;

                 (f)      any event or condition shall occur which results in
         the acceleration of the maturity of any Material Debt of the Company
         or any Restricted Subsidiary (other than the Notes) or enables (or,
         with the giving of notice or lapse of time or both, would enable) the
         holder of such Material Debt or any Person acting on such holder's
         behalf to accelerate the maturity thereof;

                 (g)      the Company or any Restricted Subsidiary shall
         commence a voluntary case or other proceeding seeking liquidation,
         reorganization or other relief with respect to itself or its debts
         under any bankruptcy, insolvency or other similar law now or hereafter
         in effect or seeking the appointment of a trustee, receiver,
         liquidator, custodian or other similar official of it or any
         substantial part of its property, or shall consent to any such relief
         or to the appointment of or taking possession by any such official in
         an involuntary case or other proceeding commenced against it, or shall
         make a general assignment for the benefit of creditors, or shall fail
         generally to pay its debts as they become due, or shall take any
         corporate action to authorize any of the foregoing;

                 (h)      an involuntary case or other proceeding shall be
         commenced against the Company or any Restricted Subsidiary seeking
         liquidation, reorganization or other relief with respect to it or its
         debts under any bankruptcy, insolvency or other similar law now or
         hereafter in effect or seeking the appointment of a trustee, receiver,
         liquidator, custodian or other similar official of it or any
         substantial part of its property, and such involuntary case or other
         proceeding shall remain undismissed and unstayed for a period of 60
         days; or an order for relief shall be entered against the Company or
         any Restricted Subsidiary under the federal bankruptcy laws as now or
         hereafter in effect;





                                      -65-
<PAGE>   71
                 (i)      any member of the ERISA Group shall fail to pay when
         due an amount or amounts aggregating in excess of $5,000,000 which it
         shall have become liable to pay under Title IV of ERISA; or notice of
         intent to terminate a Material Plan shall be filed under Title IV of
         ERISA by any member of the ERISA Group, any plan administrator or any
         combination of the foregoing; or the PBGC shall institute proceedings
         under Title IV of ERISA to terminate, to impose liability (other than
         for premiums under Section 4007 of ERISA) in respect of, or to cause a
         trustee to be appointed to administer any Material Plan; or a
         condition shall exist by reason of which the PBGC would be entitled to
         obtain a decree adjudicating that any Material Plan must be
         terminated; or there shall occur a complete or partial withdrawal
         from, or a default, within the meaning of Section 4219(c)(5) of ERISA,
         with respect to, one or more Multiemployer Plans which could cause one
         or more members of the ERISA Group to incur a current payment
         obligation in excess of $5,000,000;

                 (j)      a judgment or order for the payment of money in
         excess of $15,000,000 (net of applicable insurance coverage which is
         acknowledged by the insurer) shall be rendered against the Company or
         any Restricted Subsidiary and such judgment or order shall continue
         unsatisfied and unstayed for a period of 30 days;

                 (k)      any Person or two or more Persons acting in concert,
         together with any affiliates thereof, (i) shall have acquired
         beneficial ownership, directly or indirectly, (a) within any 12 month
         period, of (1) more than 25% of the Company's common stock or (2)
         securities representing more than 25% of the combined voting power of
         all securities of the Company entitled to vote in the election of
         directors (other than securities having such power only by reason of
         the happening of a contingency) ("Voting Securities"), or (b) within
         any 24 month period, of (1) more than 40% of the Company's common
         stock or (2) more than 40% of the Company's Voting Securities, (ii)
         owns a higher percentage of the Company's common stock or Voting
         Securities than the percentage owned by Kohlberg Kravis Roberts & Co.
         and/or non-operating investment entities it controls, and (iii) either
         (a) owns 50% or more of the Company's common stock or Voting
         Securities, (b) directly or indirectly elects or causes the election
         of Persons constituting in the aggregate a majority of the Board of
         Directors of the Company or any Restricted Subsidiary, or (c)
         exercises, directly or indirectly, by written agreement, control over
         the Company or any Restricted Subsidiary; provided that no Default or
         Event of Default shall occur under this subsection (k) until the
         Agent, following request by the Required Banks, gives notice to the
         Company that such an Event of Default is declared, and such notice may
         not be given after the date which is 45 days after the Banks actually
         receive notice from the Company to the effect that the matters set
         forth in clauses (i), (ii) and (iii) have occurred (for purposes of
         this provision, "beneficial ownership" shall mean beneficial ownership
         within the





                                      -66-
<PAGE>   72
         meaning of Rule 13d-3 of the Securities and Exchange Commission
         promulgated under the Securities Exchange Act of 1934, as amended, and
         the number and percentage of securities beneficially owned by any
         Person or Persons shall be calculated in accordance with such Rule);
         or

                 (l)      any "Event of Default", as defined in the Short-Term
         Credit Agreement, shall occur;

then, and in every such event, the Agent shall (i) if requested by Banks having
at least 51% in the aggregate amount of the Commitments, by notice to the
Company terminate the Commitments and, upon the giving of such notice by the
Agent, they shall thereupon terminate, and (ii) if requested by Banks holding
Notes evidencing at least 51% in aggregate principal amount of the Loans (in
the case of Sterling Loans, such principal amount being the Current Dollar
Amounts of such Sterling Loans then in effect), by notice to the Company
declare the Notes (together with accrued interest thereon) to be, and, upon the
giving of such notice by the Agent, the Notes shall thereupon become,
immediately due and payable without notice of intent to accelerate, notice of
acceleration, presentment, demand, protest or other notice of any kind, all of
which are hereby waived by the Company; provided that in the case of any of the
Events of Default specified in clause (g) or (h) above, without any notice to
the Company or any other act by the Agent or the Banks, the Commitments shall
thereupon terminate and the Notes (together with accrued interest thereon)
shall become immediately due and payable without notice of intent to
accelerate, notice of acceleration, presentment, demand, protest or other
notice of any kind, all of which are hereby waived by the Company.

                 SECTION 6.02.  Notice of Default.  The Agent shall give notice
to the Company under Section 6.01(c) promptly upon being requested to do so by
any Bank and shall thereupon notify all the Banks thereof.

                                  ARTICLE VII

                                   THE AGENT

                 SECTION 7.01.  Appointment and Authorization.  Each Bank
irrevocably appoints and authorizes the Agent to take such action as agent on
its behalf and to exercise such powers under the Financing Documents as are
delegated to the Agent by the terms hereof or thereof, together with all such
powers as are reasonably incidental thereto.

                 SECTION 7.02.  Agent and Affiliates.  NationsBank shall have
the same rights and powers under the Financing Documents as any other Bank and
may exercise or refrain from exercising the same as though it were not the
Agent, and NationsBank and its affiliates may accept deposits from, lend money
to, and generally engage in any





                                      -67-
<PAGE>   73
kind of business with the Company or any Subsidiary or other affiliate of the
Company as if it were not the Agent hereunder.

                 SECTION 7.03.  Action by Agent.  The obligations of the Agent
under the Financing Documents are only those expressly set forth herein.
Without limiting the generality of the foregoing, the Agent shall not be
required to take any action with respect to any Default, except as expressly
provided in Article VI.

                 SECTION 7.04.  Consultation with Experts.  The Agent may
consult with legal counsel (who may be counsel for the Company or any
Subsidiary), independent public accountants, independent petroleum engineers
and other experts selected by it and the Agent shall not be liable for any
action taken or omitted to be taken by it in good faith in accordance with the
advice of such counsel, accountants, engineers or experts.

                 SECTION 7.05.  Liability of Agent.  Neither the Agent nor any
of its directors, officers, agents or employees shall be liable for any action
taken or not taken by it in connection herewith (i) with the consent or at the
request of the Required Banks or (ii) in the absence of its own gross
negligence or willful misconduct.  Neither the Agent nor any of its directors,
officers, agents or employees shall be responsible for or have any duty to
ascertain, inquire into or verify (i) any statement, warranty or representation
made in connection with this Agreement or any borrowing hereunder; (ii) the
performance or observance of any of the covenants or agreements of the Company
or any Subsidiary; (iii) the satisfaction of any condition specified in Article
III, except receipt of items required to be delivered to the Agent; (iv) the
validity, effectiveness or genuineness of the Financing Documents or any other
instrument or writing furnished in connection herewith; or (v) the accuracy of
any Engineering Report.  The Agent shall not incur any liability by acting in
reliance upon any notice, consent, certificate, statement, or other writing
(which may be a bank wire, telex or similar writing) believed by it to be
genuine or to be signed by the proper party or parties.

                 SECTION 7.06.  Indemnification.  Each Bank shall, ratably in
accordance with its Commitment, indemnify the Agent (to the extent not
reimbursed by the Company) against any cost, expense (including counsel fees
and disbursements), claim, demand, action, loss or liability (except such as
result from the Agent's gross negligence or willful misconduct) that the Agent
may suffer or incur in connection with the Financing Documents or any action
taken or omitted by the Agent hereunder (IT BEING EXPRESSLY UNDERSTOOD AND
AGREED THAT, EXCEPT FOR SUCH NEGLIGENCE AS IS SO DETERMINED TO CONSTITUTE GROSS
NEGLIGENCE, SUCH INDEMNIFICATION DOES EXTEND TO THE CONSEQUENCES OF THE
ORDINARY NEGLIGENCE, WHETHER SOLE OR CONTRIBUTORY, OF THE AGENT).





                                      -68-
<PAGE>   74
                 SECTION 7.07.  Credit Decision.  Each Bank acknowledges that
it has, independently and without reliance upon the Agent or any other Bank,
and based on such documents and information as it has deemed appropriate, made
its own credit analysis and decision to enter into this Agreement.  Each Bank
also acknowledges that it will, independently and without reliance upon the
Agent or any other Bank, and based on such documents and information as it
shall deem appropriate at the time, continue to make its own credit decisions
in taking or not taking any action under this Agreement.

                 SECTION 7.08.  Successor Agent.  The Agent may resign at any
time by giving written notice thereof to the Banks and the Company and may be
removed at any time with or without cause by the Required Banks.  Upon any such
resignation or removal, the Company shall have the right, with the consent of
the Required Banks, to appoint a successor Agent.  If no successor Agent shall
have been so appointed with the consent of the Required Banks, and shall have
accepted such appointment, within 30 days after the retiring Agent's giving of
notice of resignation or the Required Banks' removal of the retiring Agent,
then the retiring Agent may, on behalf of the Banks, appoint a successor Agent,
which shall be a commercial bank organized or licensed under the laws of the
United States of America or of any State thereof and having a combined capital
and surplus of at least $50,000,000.  Upon the acceptance of its appointment as
Agent hereunder by a successor Agent, such successor Agent shall thereupon
succeed to and become vested with all the rights and duties of the retiring
Agent, and the retiring Agent shall be discharged from its duties and
obligations under the Financing Documents.  After any retiring Agent's
resignation or removal hereunder as Agent, the provisions of this Article VII
shall inure to its benefit as to any actions taken or omitted to be taken by it
while it was Agent.

                 SECTION 7.09.  Agent's Fees.  The Company shall pay to the
Agent for its own account fees in the amounts and at the times previously
agreed upon between the Company and the Agent.

                                  ARTICLE VIII

                            CHANGE IN CIRCUMSTANCES

                 SECTION 8.01.  Basis for Determining Interest Rate Inadequate
or Unfair.  (a) If on or prior to the first day of any of any Interest Period
(unless such Interest Period is an Interest Period for Sterling Loans):

                 (i)      the Agent is advised by the Reference Banks that
         deposits in Dollars (in the applicable amounts) are not being offered
         to the Reference Banks in the relevant market for such Interest
         Period, or





                                      -69-
<PAGE>   75
                 (ii)     in the case of a Committed Borrowing, Banks having
         50% or more of the aggregate amount of the Commitments advise the
         Agent that the London Interbank Offered Rate as determined by the
         Agent will not adequately and fairly reflect the cost to such Banks of
         funding their Euro-Dollar Loans for such Interest Period,

the Agent shall forthwith give notice thereof to the Company and the Banks,
whereupon until the Agent notifies the Company that the circumstances giving
rise to such suspension no longer exist, (1) the obligations of the Banks to
make Euro-Dollar Loans, or make any Conversion that results in any Loan
becoming or remaining a Euro-Dollar Loan, shall be suspended, and (2) unless
the Company notifies the Agent before 10:00 A.M. (Houston time) on the date of
any Fixed Rate Borrowing for which a Notice of Borrowing has previously been
given that it elects not to borrow on such date, (x) if such Fixed Rate
Borrowing is a Euro-Dollar Borrowing, such Borrowing shall instead be made as a
Base Rate Borrowing and (y) if such Fixed Rate Borrowing is a Money Market
LIBOR Borrowing, the Money Market LIBOR Loans comprising such Borrowing shall
bear interest for each day from and including the first day to but excluding
the last day of the Interest Period applicable thereto at the sum of the Base
Rate for such day plus at such times as any Event of Default exists, 1%.

                 (b) If on or prior to the first day of any Interest Period for
any Sterling Loan:

                 (i)      the Agent is advised by the Reference Banks that
         deposits in Sterling (in the applicable amounts) are not being offered
         to the Reference Banks in the relevant market for such Interest
         Period, or

                 (ii)     Banks having 50% or more of the aggregate amount of
         the Commitments advise the Agent that the Sterling Interbank Offered
         Rate as determined by the Agent will not adequately and fairly reflect
         the cost to such Banks of funding their Sterling Loans for such
         Interest Period, or

                 (iii)    any Bank advises the Agent that such Bank reasonably
         believes that having its Sterling Loan outstanding for such Interest
         Period could reasonably be expected to result in a reduction in
         interest payable to such Bank pursuant to Section 2.16(a) or 2.16(b),
         or

                 (iv)     none of the Reference Banks furnishes the Agent with
         the information contemplated by Section 2.19(a) or Banks having 50% or
         more of the aggregate amount of the Commitments advise the Agent that
         Sterling is not freely convertible and freely transferable into
         Dollars or that Dollars are not freely convertible and freely
         transferable into Sterling,





                                      -70-
<PAGE>   76
the Agent shall forthwith give notice thereof to the Company and the Banks,
whereupon until the Agent notifies the Company that the circumstances giving
rise to such suspension no longer exist:

         (1)     the obligations of the Banks to make new Sterling Loans, or
                 make any Conversion that results in any Loan (other than an
                 existing Sterling Loan) becoming a Sterling Loan, shall be
                 suspended and (A) unless the Company notifies the Agent before
                 10:00 A.M. (Houston time) on the date specified for any new
                 Sterling Borrowing for which a Notice of Borrowing has
                 previously been given, that it elects not to borrow on such
                 date, such Sterling Borrowing shall instead be made as a Base
                 Rate Borrowing (based on the Current Dollar Amount of such
                 Sterling Borrowing, but subject to the provisions and
                 limitations applicable to all Base Rate Borrowings set forth
                 herein), and (B) unless the Company notifies the Agent before
                 10:00 A.M. (Houston time) on the date specified for any
                 Conversion of a Loan (other than an existing Loan) into a
                 Sterling Loan for which a notice of Conversion has previously
                 been given, that it elects not to Convert such Loan on such
                 date, such Loan shall be Converted into a Base Rate Loan;

         (2)     in the event that any of the circumstances referred to in
                 paragraphs (i), (ii) or (iii) exist but none of the
                 circumstances referred to in paragraph (iv) exists, the
                 obligations of the Banks to make any Conversion that results
                 in any Sterling Loan remaining a Sterling Loan shall be
                 suspended;

         (3)     in the event that any of the circumstances referred to in
                 paragraph (iv) exist but none of the circumstances referred to
                 in paragraphs (i), (ii) or (iii) exist, each existing Sterling
                 Loan shall be Converted on the last day of each Interest
                 Period therefor by continuing such Sterling Loan for
                 additional one month Interest Period(s) until such time as the
                 circumstances causing such suspension no longer exist; and

         (4)     in the event that any of the circumstances referred to in
                 paragraph (iv) exist and any of the circumstances referred to
                 in paragraph (i), (ii) or (iii) exist, each existing Sterling
                 Loan shall continue as a Sterling Loan but shall bear interest
                 at (a) a rate per annum to be agreed upon by the Company and
                 the Required Banks, acting reasonably and in good faith with a
                 view to agreeing to an interest rate that is the economic
                 equivalent of the interest rate that would have applied (for
                 successive one month Interest Period(s) until such time as the
                 circumstances causing such suspension no longer exist) had
                 such event not existed, or (b) in the absence of such
                 agreement referred to in the preceding clause (a), at the rate
                 applicable to such Sterling Loan prior to such event.





                                      -71-
<PAGE>   77
                 SECTION 8.02.  Illegality.  (a) If, after (x) the date of this
Agreement, in the case of any Euro-Dollar Loan or (y) the date of the related
Money Market Quote, in the case of any Money Market LIBOR Loan, 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 (or its Euro-Dollar Lending
Office) 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 (or its Euro-Dollar Lending Office) to make,
maintain or fund its Euro-Dollar Loans or Money Market LIBOR Loans, as the case
may be, or make any Conversion that results in any Loan becoming or remaining a
Euro-Dollar Loan, and such Bank shall so notify the Agent, the Agent shall
forthwith give notice thereof to the other Banks and the Company, whereupon
until such Bank notifies the Company and the Agent that the circumstances
giving rise to such suspension no longer exist, the obligation of such Bank to
make Euro-Dollar Loans, or make any Conversion that results in any Loan
becoming or remaining a Euro-Dollar Loan, or make Money Market LIBOR Loans, as
the case may be, shall be suspended.  Before giving any notice to the Agent
pursuant to this Section 8.02(a), such Bank shall designate a different
Euro-Dollar Lending Office if such designation will avoid the need for giving
such notice and will not, in the judgment of such Bank, be otherwise
disadvantageous to such Bank.  If such Bank shall determine that it may not
lawfully continue to maintain and fund any of its outstanding Euro-Dollar Loans
or Money Market LIBOR Loans, as the case may be, to maturity and shall so
specify in such notice, the Company shall immediately prepay in full the then
outstanding principal amount of each such Euro-Dollar Loan or Money Market
LIBOR Loan, as the case may be, of such Bank, together with accrued interest
thereon.  Concurrently with prepaying each such Euro-Dollar Loan, the Company
shall borrow a Base Rate Loan in an equal principal amount from such Bank (on
which interest and principal shall be payable contemporaneously with the
related Euro-Dollar Loans of the other Banks), and such Bank shall make such a
Base Rate Loan.

                 (b) If, after the date of this 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 (or its Sterling Lending Office) 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 (or its Sterling Lending Office) to make, maintain or
fund its Sterling Loans or make any Conversion that results in any Loan
becoming or remaining a Sterling Loan, and such Bank shall so notify the Agent,
the Agent shall forthwith give notice thereof to the other Banks and the
Company, whereupon until such Bank notifies the Company and the Agent that the
circumstances giving rise to such suspension no longer exist, the obligation of
such Bank to make Sterling Loans, or make any Conversion that results in any
Loan becoming or remaining





                                      -72-
<PAGE>   78
a Sterling Loan, as the case may be, shall be suspended.  Before giving any
notice to the Agent pursuant to this Section 8.02(b), such Bank shall designate
a different Sterling Lending Office if such designation will avoid the need for
giving such notice and will not, in the judgment of such Bank, be otherwise
disadvantageous to such Bank.  If such Bank shall determine that it may not
lawfully continue to maintain and fund any of its outstanding Sterling Loans to
maturity and shall so specify in such notice, the Company shall immediately
prepay in full the then outstanding principal amount of each such Sterling Loan
of such Bank together with accrued interest thereon.  Concurrently with
prepaying each such Sterling Loan, the Company shall borrow a Base Rate Loan,
and such Bank shall make such Base Rate Loan, in the principal amount equal to
the Current Dollar Amount of such Sterling Loan from such Bank (on which
interest and principal shall be payable contemporaneously with the related
Sterling Loans of the other Banks) (or, if making such Base Rate Loan in such
amount would result in (x) the aggregate outstanding principal amount of such
Bank's Committed Loans (in the case of any remaining Sterling Loans, such
principal amount being the Current Dollar Amounts of such remaining Sterling
Loans then in effect) exceeding the amount of such Bank's Commitment then in
effect, or (y) the aggregate outstanding principal amount of all Loans (in the
case of any remaining Sterling Loans, such principal amount being the Current
Dollar Amounts of such remaining Sterling Loans then in effect) exceeding the
aggregate amount of the Commitments, in such lesser principal amount so that no
such excess referred to in clause (x) or (y) would so result).

                 SECTION 8.03.  Increased Cost and Reduced Return.  (a) If
after (x) the date hereof, in the case of any Committed Loan or any obligation
to make Committed Loans or (y) the date of the related Money Market Quote, in
the case of any Money Market Loan, 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 (or its Applicable Lending Office) with any request or
directive (whether or not having the force of law) of any such authority,
central bank or comparable agency:

                 (i)      shall subject any Bank (or its Applicable Lending
         Office) to any tax, duty or other charge with respect to its Fixed
         Rate Loans, its Note or its obligation to make Fixed Rate Loans, or
         shall change the basis of taxation of payments to any Bank (or its
         Applicable Lending Office) of the principal of or interest on its
         Fixed Rate Loans or any other amounts due under this Agreement in
         respect of its Fixed Rate Loans or its obligation to make Fixed Rate
         Loans (except for changes in the rate of tax on the overall net income
         of such Bank or its Applicable Lending Office imposed by the
         jurisdiction in which such Bank's principal executive office or
         Applicable Lending Office is located); or





                                      -73-
<PAGE>   79
                 (ii)     shall impose, modify or deem applicable any reserve,
         special deposit or similar requirement (including, without limitation,
         any such requirement imposed by the Board of Governors of the Federal
         Reserve System against assets of, deposits with or for the account of,
         or credit extended by, any Bank (or its Applicable Lending Office) or
         on the United States market for certificates of deposit or the London
         interbank market any other condition affecting its Fixed Rate Loans,
         its Note or its obligation to make Fixed Rate Loans;

and the result of any of the foregoing is to increase the cost to such Bank (or
its Applicable Lending Office) of making or maintaining any Fixed Rate Loan or
making any Conversion (other than changing Euro-Dollar Loans into Base Rate
Loans), or to reduce the amount of any sum received or receivable by such Bank
(or its Applicable Lending Office) under this Agreement or under its Note with
respect thereto, by an amount deemed by such Bank to be material, then, within
15 days after demand by such Bank (with a copy to the Agent), the Company shall
pay to such Bank such additional amount or amounts as will compensate such Bank
for such increased cost or reduction; provided that the Company shall not be
obligated to compensate any Bank for any such reduction attributable to a
period (i) more than 90 days prior to the giving of notice by such Bank to the
Company of its intention to seek compensation under this subsection (a) or (ii)
more than six months prior to the making of demand by such Bank for payment
thereof in accordance herewith.

                 (b)      If any Bank shall have determined that the adoption
of any applicable law, rule or regulation regarding capital adequacy, 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 any request or directive
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 capital of such Bank (or its Parent) as a
consequence of such Bank's obligations hereunder to a level below that which
such Bank (or its Parent) could have achieved but for such adoption, change,
request or directive (taking into consideration its policies with respect to
capital adequacy) by an amount deemed by such Bank to be material, then from
time to time, within 15 days after demand by such Bank (with a copy to the
Agent), the Company shall pay to such Bank such additional amount or amounts as
will compensate such Bank (or its Parent) for such reduction; provided that the
Company shall not be obligated to compensate any Bank for any such reduction
attributable to a period (i) more than 90 days prior to the giving of notice by
such Bank to the Company of its intention to seek compensation under this
subsection (b) or (ii) more than six months prior to the making of demand by
such Bank for payment thereof in accordance therewith.





                                      -74-
<PAGE>   80
                 (c)      Each Bank will promptly notify the Company and the
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 and will
designate a different Applicable Lending Office if such designation will avoid
the need for, or reduce the amount of, such compensation and will not, in the
judgment of such Bank, be otherwise disadvantageous to such Bank.  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.  In determining such amount, such
Bank may use any reasonable averaging and attribution methods.

                 SECTION 8.04.  Base Rate Loans Substituted for Affected Fixed
Rate Loans.  If (i) the obligation of any Bank to make Euro-Dollar Loans or
Sterling Loans to the Company has been suspended pursuant to Section 8.02 or
(ii) any Bank has demanded compensation under Section 8.03(a) in respect of
Euro-Dollar Loans or Sterling Loans and the Company shall, by at least five
Euro-Dollar Business Days' prior notice to such Bank through the Agent, have
elected that the provisions of this Section 8.04 shall apply to such Bank,
then, unless and until such Bank notifies the Company that the circumstances
giving rise to such suspension or demand for compensation no longer apply:

                 (a)      all Loans to the Company which would otherwise be
         made by such Bank as, or be Converted by such Bank as or into,
         Euro-Dollar Loans or Sterling Loans, as the case may be, shall instead
         be made as, or Converted into, Base Rate Loans (on which interest and
         principal shall be payable contemporaneously with the related Fixed
         Rate Loans of the other Banks), and

                 (b)      after each of its Euro-Dollar Loans or Sterling
         Loans, as the case may be, to the Company has been repaid, all
         payments of principal which would otherwise be applied to repay such
         Fixed Rate Loans shall be applied to repay its Base Rate Loans
         instead.

                 SECTION 8.05.  Substitution of Bank.  If (i) the obligation of
any Bank to make Euro-Dollar Loans or Sterling Loans has been suspended
pursuant to Section 8.01(b)(iii) or Section 8.02, (ii) any Bank has demanded
compensation under Section 8.03 or payment of Taxes or Other Taxes under
Section 2.17, or (iii) after satisfaction of all applicable conditions
precedent, any Bank fails to fund when due any Committed Loan it is obligated
to fund under this Agreement, the Company shall have the right, with the
assistance of the Agent, to seek a mutually satisfactory substitute bank or
banks (which may be one or more of the Banks) to purchase the Note and assume
the Commitment of such Bank (any such Bank is herein called an "Affected
Bank").  Each Affected Bank agrees to sell, without recourse, all of its
Commitment, its interest in this Agreement and its Note to any such bank for an
amount equal to the sum of the outstanding unpaid principal of and accrued
interest on the Loans of such Affected Bank and all commitment fees and other
fees and amounts due such Affected Bank





                                      -75-
<PAGE>   81
hereunder, calculated, in each case, to the date such Commitment, interest in
this Agreement and Note are purchased (the principal of and accrued interest on
Sterling Loans shall be paid in Sterling and all other amounts shall be paid in
Dollars).


                                   ARTICLE IX

                                 MISCELLANEOUS

                 SECTION 9.01.  Notices.  All notices, requests and other
communications to any party hereunder shall be in writing (including bank wire,
telex, facsimile transmission or similar writing) and shall be given to such
party: (x) in the case of the Company or the Agent, at its address or telex
number set forth on the signature pages hereof, (y) in the case of any Bank, at
its address or telex number set forth in its Administrative Questionnaire or
(z) in the case of any party, such other address or telex number as such party
may hereafter specify for the purpose by notice to the Agent and the Company.
Each such notice, request or other communication shall be effective (i) if
given by telex, when such telex is transmitted to the telex number specified in
this Section and the appropriate answer-back is received, (ii) if given by
mail, 72 hours after such communication is deposited in the mails with first
class postage prepaid, addressed as aforesaid, (iii) if given by facsimile
transmission, when such facsimile is transmitted and accompanied by a telephone
call to the party receiving such transmission or (iv) if given by any other
means, when delivered at the address specified in this Section; provided that
notices to the Agent shall not be effective until received.

                 SECTION 9.02.  No Waivers.  No failure or delay by the Agent
or any Bank in exercising any right, power or privilege under any Financing
Document shall operate as a waiver thereof nor shall any single or partial
exercise thereof preclude any other or further exercise thereof or the exercise
of any other right, power or privilege.  The rights and remedies provided in
the Financing Documents shall be cumulative and not exclusive of any rights or
remedies provided by law.

                 SECTION 9.03.  Expenses; Indemnification.  (a) The Company
shall pay (i) all reasonable documented out-of-pocket costs and expenses of
the Agent and the Arranger incurred in connection with the syndication of this
Agreement or the preparation of the Financing Documents, any waiver or consent
thereunder or any amendment thereof or any Default or alleged Default hereunder
and (ii) if an Event of Default occurs, all reasonable out-of-pocket costs and
expenses incurred by the Agent or incurred by any Bank, including fees and
disbursements of counsel, in connection with such Event of Default and
collection and other enforcement proceedings resulting therefrom.

                 (b)      The Company agrees to indemnify the Agent, each
Co-Agent, the Arranger and each Bank and hold the Agent, each Co-Agent, the
Arranger and each





                                      -76-
<PAGE>   82
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 for the Agent, any Co-Agent, the Arranger or any
Bank in connection with any investigative, administrative or judicial
proceedings, whether or not the Agent, such Co-Agent, the Arranger or such
Bank, as the case may be, shall be designated a party thereto) which may be
incurred by the Agent, any Co-Agent, the Arranger or any Bank, relating to or
arising out of this Agreement or any actual or proposed use of proceeds of
Loans hereunder, including specifically, without limitation, all liabilities,
losses, damages, costs and expenses arising out of a violation of any
Environmental Law; provided, that neither the Agent nor any Co-Agent nor the
Arranger nor any 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 (IT BEING EXPRESSLY UNDERSTOOD AND AGREED THAT, EXCEPT
FOR SUCH NEGLIGENCE AS IS SO DETERMINED TO CONSTITUTE GROSS NEGLIGENCE, SUCH
INDEMNIFICATION DOES EXTEND TO THE CONSEQUENCES OF THE ORDINARY NEGLIGENCE,
WHETHER SOLE OR CONTRIBUTORY, OF THE INDEMNITEE).

                 (c)      Within a reasonable period of time after any Person
entitled to indemnification under Section 9.03(b) (an "Indemnified Person")
receives actual notice of the assertion of any claim or the commencement of any
action, or any threatened claim or action, covered by Section 9.03(b), such
Indemnified Person shall, if indemnification with respect thereof is to be
sought from the Company under Section 9.03(b), notify the Company in writing of
such claim or action; provided that the failure to so notify the Company shall
not relieve the Company from any liability which the Company may have to the
Indemnified Person under Section 9.03(b) unless the obligations of the Company
under Section 9.03(b) have been significantly increased as a result of such
failure.  The Company and such Indemnified Person shall cooperate in the
defense of any such claim or action and shall take those actions reasonably
within their power to take which are necessary to preserve any legal defenses
to such matters.  If any such claim or action shall be brought or threatened
against an Indemnified Person, so long as no Event of Default exists, the
Company shall be entitled to participate in the defense thereof, and, with the
consent of such Indemnified Person, to assume the defense thereof with counsel
reasonably satisfactory to the Indemnified Person.  Notwithstanding any
provision hereof to the contrary, no consent order or settlement shall be
entered into in any such claim or action unless both the Company and such
Indemnified Person have given their prior written consent thereto, provided
that such consent of the Company shall not be required if any Event of Default
exists.

                 (d)      All obligations of the Company to indemnify or
otherwise to make payments to the Agent, any Co-Agent, the Arranger or any
Bank provided in this Agreement shall survive any termination of the
Commitments and the repayment of the Loans.





                                      -77-
<PAGE>   83
                 SECTION 9.04.  Sharing of Set-Offs, Etc.  Each Bank agrees
that if it shall, by exercising any right of set-off or counterclaim or
otherwise, receive payment of a proportion of the aggregate amount of principal
and interest due with respect to any Note held by it which is greater than the
proportion received by any other Bank in respect of the aggregate amount of
principal and interest due with respect to any Note held by such other Bank,
the Bank receiving such proportionately greater payment shall purchase such
participations in the Notes held by the other Banks, and such other adjustments
shall be made, as may be required so that all such payments of principal and
interest with respect to the Notes held by the Banks shall be shared by the
Banks pro rata; provided that nothing in this Section shall impair the right of
any Bank to exercise any right of set-off or counterclaim it may have and to
apply the amount subject to such exercise to the payment of indebtedness of the
Company other than its indebtedness under the Notes.  The Company agrees, to
the fullest extent it may effectively do so under applicable law, that any
holder of a participation in a Note, whether or not acquired pursuant to the
foregoing arrangements, may exercise rights of set-off or counterclaim and
other rights with respect to such participation as fully as if such holder of a
participation were a direct creditor of the Company in the amount of such
participation.

                 SECTION 9.05.  Amendments and Waivers.  Any provision of this
Agreement or the Notes may be amended or waived, if, but only if, such
amendment or waiver is in writing and is signed by the Company and the Required
Banks (and, if the rights or duties of the Agent are affected thereby, by the
Agent); provided that no such amendment or waiver shall, unless signed by all
the Banks, (i) increase or decrease the Commitment of any Bank or subject any
Bank to any additional obligation, (ii) reduce the principal of or rate of
interest on any Loan or any fees hereunder, (iii) postpone the date fixed for
any payment of principal of or interest on any Loan or any fees hereunder or
for any reduction or termination of any Commitment, or (iv) change the
percentage of the Commitments or of the aggregate unpaid principal amount of
the Notes, or the number of Banks, which shall be required for the Banks or any
of them to take any action under this Section or any other provision of this
Agreement.

                 SECTION 9.06.  Successors and Assigns.  (a) The provisions of
this Agreement shall be binding upon and inure to the benefit of the parties
hereto and their respective successors and assigns, except that the Company may
not assign or otherwise transfer any of its rights under this Agreement without
the prior written consent of all Banks.

                 (b)      Any Bank may at any time and from time to 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 the Company and the Agent, such Bank shall remain
responsible for the performance of its obligations hereunder, and the Company
and the Agent shall continue to deal solely and directly with such Bank in
connection with such Bank's rights and obligations under this





                                      -78-
<PAGE>   84
Agreement.  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 the Company hereunder
including, without limitation, the right to approve any amendment, modification
or waiver of any provision of this Agreement; provided that such participation
agreement may provide that such Bank will not agree to any modification,
amendment or waiver of this Agreement described in clause (i), (ii) or (iii) of
Section 9.05 without the consent of the Participant.  The Company agrees that
each Participant shall, to the extent provided in its participation agreement,
be entitled to the benefits of Article VIII with respect to its participating
interest.  An assignment or other transfer which is not permitted by subsection
(c) or (d) below shall be given effect for purposes of this Agreement only to
the extent of a participating interest granted in accordance with this
subsection (b).

                 (c)      Any Bank may at any time assign to one or more banks
or other institutions (each an "Assignee") a proportionate part of all of its
rights and obligations under this Agreement and the Notes in an amount which,
when added to the amount of the rights and obligations under the Short-Term
Credit Agreement contemporaneously assigned by such transferor Bank to such
Assignee pursuant to the second proviso to the first sentence of Section
9.06(c) of the Short-Term Credit Agreement, equals $10,000,000 or more (in the
case of Sterling Loans, based on the Current Dollar Amount of such Sterling
Loans in effect at such time), and such Assignee shall assume such rights and
obligations under this Agreement and the Notes, pursuant to an Assignment
executed by such Assignee and such transferor Bank, with (and subject to) the
subscribed consent of the Company and the Agent (which such consents shall not
be unreasonably withheld); provided that if an Assignee is an affiliate of such
transferor Bank or is another Bank, no such consent of the Company shall be
required; provided further that each such assignment shall be of a constant,
and not a varying, percentage of all rights and obligations under this
Agreement and the Notes, and the same constant percentage of all rights and
obligations of such transferor Bank under the Short-Term Credit Agreement and
the notes thereunder shall be contemporaneously assigned by such transferor
Bank to such Assignee pursuant to Section 9.06(c) of the Short-Term Credit
Agreement.  Upon execution and delivery of such instrument (and delivery to the
Agent of an Administrative Questionnaire with respect to such Assignee, if such
Assignee has not already done so) and 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
Agreement and shall have all the rights and obligations of a Bank with a
Commitment 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, the Agent and the Company shall make appropriate arrangements
so that, if required, a new Note is issued to the Assignee.  In connection with
any such assignment, the transferor Bank shall pay to the Agent for its account
an administrative fee in the amount of $2,500 for processing such assignment.
If the Assignee is not incorporated under the laws of the





                                      -79-
<PAGE>   85
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 the
Company and the Agent certification as to exemption from deduction or
withholding of any United States federal income taxes in accordance with
Section 2.17.  Notwithstanding the first sentence of this subsection (c), a
Bank may not make an assignment pursuant to this subsection (c) if after giving
effect thereto such Bank would hold less than 1.5% (or until March 29, 1998, 3%
in the case of NationsBank, Bank of America National Trust and Savings
Association and Union Bank of Switzerland, Houston Agency) of the Commitments
(for this purpose such Bank shall be deemed to hold any participating interests
granted by such Bank pursuant to subsection (b) above and any rights assigned
pursuant to subsection (d) below).

                 (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, Participant or other transferee of any
Bank's rights shall be entitled to receive any greater payment under Section
8.03 than such Bank would have been entitled to receive with respect to the
rights transferred, unless such transfer is made with the Company's prior
written consent or by reason of the provisions of Section 8.02 or 8.03
requiring such Bank to designate a different Applicable Lending Office under
certain circumstances or at a time when the circumstances giving rise to such
greater payment did not exist.

                 SECTION 9.07.  Collateral.  Each of the Banks represents to
each Agent and each of the other Banks that it in good faith is not relying
upon any margin stock (as defined in Regulation G) or any margin stock (as
defined in Regulation U) as collateral in the extension or maintenance of the
credit provided for in this Agreement.

                 SECTION 9.08.  Texas Law.  This Agreement and each Note shall
be construed in accordance with and governed by the law of the State of Texas.

                 SECTION 9.09.  CONSENT TO JURISDICTION.  THE COMPANY HEREBY
IRREVOCABLY CONSENTS TO THE NONEXCLUSIVE JURISDICTION OF THE COURTS OF THE
STATE OF TEXAS AND OF ANY FEDERAL COURT LOCATED IN SUCH STATE OVER IT IN
CONNECTION WITH ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO ANY
FINANCING DOCUMENT AND, TO THE FULLEST EXTENT PERMITTED BY LAW, FURTHER AGREES
(AND SHALL NOT CONTEST) THAT THE PROPER VENUE FOR FILING AND MAINTAINING ANY
SUCH ACTION OR PROCEEDING SHALL BE IN THE STATE OF TEXAS.  IN ANY SUCH ACTION
OR PROCEEDING, THE COMPANY WAIVES PERSONAL SERVICE OF ANY SUMMONS, COMPLAINT OR
OTHER PROCESS OR NOTICE AND AGREES THAT SERVICE BY FIRST CLASS MAIL, RETURN
RECEIPT REQUESTED, TO THE COMPANY AT ITS ADDRESS FOR





                                      -80-
<PAGE>   86
NOTICES HEREUNDER, OR ANY FORM OF SERVICE PROVIDED FOR IN THE TEXAS CIVIL
PRACTICE AND REMEDIES CODE THEN IN EFFECT SHALL CONSTITUTE GOOD AND SUFFICIENT
SERVICE UPON THE COMPANY.

                 SECTION 9.10.  Counterparts.  This Agreement may be signed in
any number of counterparts, each of which shall be an original, with the same
effect as if the signatures thereto and hereto were upon the same instrument.

                 SECTION 9.11.  WAIVER OF JURY TRIAL.  THE COMPANY, THE AGENT,
THE CO-AGENTS AND THE BANKS HEREBY IRREVOCABLY WAIVE ANY AND ALL RIGHT TO TRIAL
BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT OR
THE TRANSACTIONS CONTEMPLATED HEREBY.

                 SECTION 9.12.  COMPLETE AGREEMENT.  THIS WRITTEN CREDIT
AGREEMENT AND THE OTHER FINANCING DOCUMENTS REPRESENT THE FINAL AGREEMENT AMONG
THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS,
OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO UNWRITTEN ORAL
AGREEMENTS AMONG THE PARTIES.

                 SECTION 9.13.  Liability of Co-Agents and Arranger.  Neither
the Arranger nor either Co-Agent, in its capacity as Co-Agent hereunder, shall
have any duty or responsibility hereunder.

                 SECTION 9.14.  Judgment Currency.  The obligations of the
Company hereunder and under the Notes to make payments in Dollars or in
Sterling (the "Obligation Currency") shall not be discharged or satisfied by
any tender or recovery pursuant to any judgment expressed in or converted into
any currency other than the Obligation Currency except to the extent to which
such tender or recovery shall result in the effective receipt by the Banks of
the full amount of the Obligation Currency expressed to be payable hereunder
and under the Notes, and accordingly such obligations of the Company shall be
enforceable as an alternate or additional cause of action for the purpose of
recovery in the Obligation Currency of the amount (if any) by which such
effective receipt shall fall short of the full amount of the Obligation
Currency expressed to be payable hereunder and under the Notes and shall not be
affected by judgment being obtained for any other sums due under this Agreement
and the Notes.





                                      -81-
<PAGE>   87
                 IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed by their respective authorized officers as of the
day and year first above written.

                            UNION TEXAS PETROLEUM HOLDINGS, INC.
                           
                           
                            By    /s/M.N. MARKOWITZ                     
                              --------------------------------------
                                     M.N. Markowitz
                                     Vice President and Treasurer
                                     1330 Post Oak Blvd.
                                     Houston, Texas 77056
                                     Telex number: 762255
                           
Commitments                
- -----------                
                           
$34,772,727.28              NATIONSBANK OF TEXAS, N.A.
                           
                           
                            By   [ILLEGIBLE]                       
                              --------------------------------------
                                Authorized Officer
                           
                           
$26,590,909.10              BANK OF AMERICA NATIONAL TRUST AND SAVINGS 
                            ASSOCIATION
                           
                           
                            By /s/ RICHARD D. BLUTH                
                              --------------------------------------
                                Authorized Officer
                           
                           
$26,590,909.10              UNION BANK OF SWITZERLAND, HOUSTON AGENCY
                           
                           
                            By /s/ J. GEORGE KUBOVE                  
                              --------------------------------------
                                Authorized Officer
                           
                           
                            By /s/ KELLY BOOTS                   
                              --------------------------------------
                                Authorized Officer


                                      -82-
<PAGE>   88

Commitments
- -----------


$20,454,545.45              THE BANK OF NOVA SCOTIA


                            By /s/ F.C.H. ASHBY                            
                              --------------------------------------
                                Authorized Officer


$20,454,545.45              CHEMICAL BANK


                            By /s/ JAMES H. RENAGE                  
                              --------------------------------------
                                Authorized Officer


$20,454,545.45              CITIBANK, N.A.


                            By  [ILLEGIBLE]                          
                              --------------------------------------
                                Authorized Officer


$20,454,545.45              CREDIT LYONNAIS CAYMAN ISLAND BRANCH


                            By /s/ PASCAL POUPELLE                      
                              --------------------------------------
                                Authorized Officer


$20,454,545.45              THE FIRST NATIONAL BANK OF CHICAGO


                            By /s/ RONALD J. DIERKEN
                              --------------------------------------
                                Authorized Agent


$20,454,545.45              LTCB TRUST COMPANY


                            By  [ILLEGIBLE]                     
                              --------------------------------------
                                Authorized Officer


                                      -83-
<PAGE>   89
Commitments
- -----------



$20,454,545.45              MELLON BANK, N.A.


                            By /s/ E. MARC EDWARDS JR.              
                              ---------------------------------------
                                 Authorized Officer


$20,454,545.45              MORGAN GUARANTY TRUST COMPANY OF NEW YORK


                            By /s/ VERNON E. FORD JR.               
                              ---------------------------------------
                                 Authorized Officer


$20,454,545.45              NATIONAL WESTMINSTER BANK PLC
                            (NEW YORK BRANCH)


                            By /s/ PAUL K. CARTER                            
                              ---------------------------------------
                                 Authorized Officer


                            NATIONAL WESTMINSTER BANK PLC
                            (NASSAU BRANCH)


                            By /s/ PAUL K. CARTER                            
                              ---------------------------------------
                                 Authorized Officer


$20,454,545.45              SOCIETE GENERALE, SOUTHWEST AGENCY


                            By [ILLEGIBLE]                       
                            -----------------------------------------
                                 Authorized Officer


$14,318,181.82              BANK OF TAIWAN


                            By [ILLEGIBLE]                      
                              ---------------------------------------
                                 Authorized Officer


$14,318,181.82              BANK OF TOKYO, LTD.,  DALLAS AGENCY


                            By [ILLEGIBLE]                        
                              ---------------------------------------
                                 Authorized Officer





                                      -84-
<PAGE>   90
Commitments
- -----------




$14,318,181.82              BANQUE NATIONALE DE PARIS, HOUSTON AGENCY


                            By [ILLEGIBLE]                            
                              --------------------------------------
                                Authorized Officer


$14,318,181.82              BANQUE PARIBAS, HOUSTON AGENCY


                            By [ILLEGIBLE]                            
                              --------------------------------------
                                Authorized Officer


                            By [ILLEGIBLE]                            
                              --------------------------------------
                                Authorized Officer


$14,318,181.82              BANQUE FRANCAISE DU COMMERCE EXTERIEUR


                            By /s/ TIMOTHY L. POLVADO               
                              --------------------------------------
                                Authorized Officer


                            By /s/ MARK A. HARRINGTON               
                              --------------------------------------
                                Authorized Officer


$14,318,181.82              CHRISTIANIA BANK


                            By [ILLEGIBLE]                            
                              --------------------------------------
                                Authorized Officer


                            By [ILLEGIBLE]                        
                              --------------------------------------
                                Authorized Officer





                                      -85-
<PAGE>   91
Commitments
- -----------


$14,318,181.82              DEN NORSKE BANK AS


                            By [ILLEGIBLE]                       
                              --------------------------------------
                                 Authorized Officer


                            By [ILLEGIBLE]                        
                              --------------------------------------
                                 Authorized Officer


$14,318,181.82              DRESDNER BANK AG, NEW YORK AND GRAND CAYMAN BRANCHES


                            By [ILLEGIBLE]                            
                              --------------------------------------
                                 Authorized Officer


                            By [ILLEGIBLE]                           
                              --------------------------------------
                                 Authorized Officer


$14,318,181.82              FIRST INTERSTATE BANK OF TEXAS, N.A.


                            By /s/ COLLIE C. MICHAELS                  
                              --------------------------------------
                                 Authorized Officer


$14,318,181.82              THE MITSUBISHI TRUST & BANKING CORPORATION


                            By [ILLEGIBLE]                           
                              --------------------------------------
                                 Authorized Officer





                                      -86-
<PAGE>   92
Commitments
- -----------


$14,318,181.82                        THE YASUDA TRUST AND BANKING COMPANY, 
                                      LIMITED, NEW YORK BRANCH


                                      By [ILLEGIBLE]                            
                                        ----------------------------------------
                                           Authorized Officer

Total Commitments:  $450,000,000
================================

                                      NATIONSBANK OF TEXAS, N.A., as Agent


                                      By /s/ PAUL A. SQUIRES 
                                        ----------------------------------------
                                         Paul A. Squires
                                         Senior Vice President

                                              700 Louisiana Street
                                              Houston, Texas 77002
                                              Telex Number:  163244
                                              Answerback:  NCNBTEXDAL


                                      BANK OF AMERICA NATIONAL TRUST AND 
                                      SAVINGS ASSOCIATION, as Co-Agent


                                      By /s/ RICHARD D. BLUTH                
                                        ----------------------------------------
                                           Authorized Officer


                                      UNION BANK OF SWITZERLAND, HOUSTON 
                                      AGENCY, as Co-Agent


                                      By /s/ J. GEORGE KUBOVE               
                                        ----------------------------------------
                                           Authorized Officer


                                      By /s/ KELLY BOOTS                    
                                        ----------------------------------------
                                           Authorized Officer





                                      -87-
<PAGE>   93
                                                                      SCHEDULE I


                         COMMITMENT REDUCTION SCHEDULE


<TABLE>
<CAPTION>
      Date                              Maximum Aggregate Commitments
      ----                              -----------------------------
<S>                                             <C>
June 30, 2000                                   $415,000,000
September 30, 2000                               380,000,000
December 31, 2000                                345,000,000
March 31, 2001                                           -0-



</TABLE>



<PAGE>   94

The following describes the Schedules and Exhibits to the Second Amended and
Restated Credit Agreement, which are omitted herein, but which will be
furnished upon request:

Schedule II      Part A lists the Existing Unrestricted Subsidiaries and
                 Existing Unimar Unrestricted Subsidiaries.  Part B lists the
                 Existing Restricted Subsidiaries, Other Restricted Subsidiary
                 and Existing Unimar Restricted Subsidiaries.

Schedule III     Part A describes Liens on ownership interests.
                 Part B describes other existing Liens.

Schedule IV      Describes certain existing restrictions.

Schedule V       Sets forth the Joint Venture Debt Agreements.

Schedule VI      Describes outstanding options.

Schedule VII     Sets forth the notice information for Sterling Loans.

Schedule VIII    Sets forth the Facility Fee and Applicable Margin at various
                 Rating Levels.

Exhibit A        Form of Note

Exhibit B        Form of Money Market Quote Request

Exhibit C        Form of Invitation for Money Market Quotes

Exhibit D        Form of Money Market Quote

Exhibit E        Form of Assignment and Assumption Agreement

Exhibit F        Form of Opinion of Counsel to the Company

Exhibit G        Form of Opinion of Special Counsel to the Company

Exhibit H        Form of Opinion of Special Counsel to the Agent






<PAGE>   1
- --------------------------------------------------------------------------------


                                  $100,000,000


                                CREDIT AGREEMENT

                                  dated as of

                                 March 29, 1996

                                     among

                      UNION TEXAS PETROLEUM HOLDINGS, INC.

                            The BANKS Listed Herein

                                      and

                           NATIONSBANK OF TEXAS, N.A.
                                    as Agent

                                      and

             BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION
                   UNION BANK OF SWITZERLAND, HOUSTON AGENCY
                                  as Co-Agents


         THE INDEMNIFICATION PROVISIONS OF SECTIONS 7.06 AND 9.03(B) OF THIS
         AGREEMENT INCLUDE INDEMNIFICATION FROM THE CONSEQUENCES OF THE
         NEGLIGENCE OF THE PERSONS INDEMNIFIED THEREBY TO THE EXTENT SET FORTH
         THEREIN

- --------------------------------------------------------------------------------
<PAGE>   2
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                      Page
         <S>            <C>                                                                                            <C>
                                                        ARTICLE I

                                                       DEFINITIONS
         SECTION 1.01.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
         SECTION 1.02.  Accounting Terms and Determinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
         SECTION 1.03.  Types of Borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21
         SECTION 1.04.  Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21
         SECTION 1.05.  Unimar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21
         SECTION 1.06.  Ratings.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21


                                                        ARTICLE II

                                                       THE CREDITS
         SECTION 2.01.  Commitments to Lend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         SECTION 2.02.  Notice of Borrowings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         SECTION 2.03.  Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         SECTION 2.04.  Notice to Banks; Funding of Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         SECTION 2.05.  Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         SECTION 2.06.  Maturity of Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         SECTION 2.07.  Interest Rates  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         SECTION 2.08.  Facility Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
         SECTION 2.09.  Optional Termination or Reduction of Commitments  . . . . . . . . . . . . . . . . . . . . . .  27
         SECTION 2.10.  Mandatory Termination or Reduction
                                   of Commitments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
         SECTION 2.11.  Optional Prepayments  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
         SECTION 2.12.  General Provisions as to Payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
         SECTION 2.13.  Funding Losses  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
         SECTION 2.14.  Computation of Interest and Fees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
         SECTION 2.15.  Chapter 15  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
         SECTION 2.16.  Maximum Interest Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
         SECTION 2.17.  Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31

                                                       ARTICLE III

                                                        CONDITIONS
         SECTION 3.01.  Initial Borrowing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         SECTION 3.02.  All Borrowings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
</TABLE>





                                      -i-
<PAGE>   3
<TABLE>
         <S>            <C>                                                                                            <C>
                                                        ARTICLE IV

                                              REPRESENTATIONS AND WARRANTIES
         SECTION 4.01.  Corporate Existence and Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
         SECTION 4.02.  Corporate and Governmental
                                  Authorization; Contravention  . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
         SECTION 4.03.  Binding Effect  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  36
         SECTION 4.04.  Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  36
         SECTION 4.05.  Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  36
         SECTION 4.06.  Compliance with ERISA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
         SECTION 4.07.  Environmental Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
         SECTION 4.08.  Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
         SECTION 4.09.  Ownership of Restricted Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         SECTION 4.10.  Title to Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         SECTION 4.11.  Taxes and Other Obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         SECTION 4.12.  Regulation U  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         SECTION 4.13.  Certain Obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39
         SECTION 4.14.  United Kingdom Assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39

                                                        ARTICLE V

                                                        COVENANTS
         SECTION 5.01.  Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39
         SECTION 5.02.  Affirmative Covenants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
         SECTION 5.03.  Primary Business  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
         SECTION 5.04.  Insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
         SECTION 5.05.  Debt  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
         SECTION 5.06.  Restricted Payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
         SECTION 5.07.  Negative Pledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
         SECTION 5.08.  Consolidations and Mergers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
         SECTION 5.09.  Use of Proceeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
         SECTION 5.10.  Addition of Guarantors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
         SECTION 5.11.  Restrictions on Dividends, Intercompany
                                  Loans, or Investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
         SECTION 5.12.  Loans and Advances  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48
         SECTION 5.13.  Cross-Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48
         SECTION 5.14.  Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48
         SECTION 5.15.  Adjusted Equity and Interest Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
         SECTION 5.16.  Excluded Subordinated Debt and Preferred Stock  . . . . . . . . . . . . . . . . . . . . . . .  49
         SECTION 5.17.  Certain Obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
         SECTION 5.18.  Restrictions on Asset Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50
         SECTION 5.19.  Conversion to Unrestricted Subsidiary . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50
</TABLE>





                                      -ii-
<PAGE>   4
<TABLE>
         <S>            <C>                                                                                            <C>
                                                        ARTICLE VI

                                                         DEFAULTS
         SECTION 6.01.  Events of Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50
         SECTION 6.02.  Notice of Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53

                                                       ARTICLE VII

                                                        THE AGENT
         SECTION 7.01.  Appointment and Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         SECTION 7.02.  Agent and Affiliates  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         SECTION 7.03.  Action by Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         SECTION 7.04.  Consultation with Experts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         SECTION 7.05.  Liability of Agent  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         SECTION 7.06.  Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         SECTION 7.07.  Credit Decision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         SECTION 7.08.  Successor Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55
         SECTION 7.09.  Agent's Fees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55

                                                       ARTICLE VIII

                                                 CHANGE IN CIRCUMSTANCES
         SECTION 8.01.  Basis for Determining Interest Rate
                                  Inadequate or Unfair  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55
         SECTION 8.02.  Illegality  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
         SECTION 8.03.  Increased Cost and Reduced Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
         SECTION 8.04.  Base Rate Loans Substituted for
                                  Affected Euro-Dollar Loans  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
         SECTION 8.05.  Substitution of Bank  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58

                                                        ARTICLE IX

                                                      MISCELLANEOUS
         SECTION 9.01.  Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
         SECTION 9.02.  No Waivers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
         SECTION 9.03.  Expenses; Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
         SECTION 9.04.  Sharing of Set-Offs, Etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  61
         SECTION 9.05.  Amendments and Waivers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  61
         SECTION 9.06.  Successors and Assigns  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  61
         SECTION 9.07.  Collateral  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  63
         SECTION 9.08.  Texas Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  63
         SECTION 9.09.  CONSENT TO JURISDICTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
         SECTION 9.10.  Counterparts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
</TABLE>





                                     -iii-
<PAGE>   5
<TABLE>
         <S>            <C>                                                                                            <C>
         SECTION 9.11.  WAIVER OF JURY TRIAL  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
         SECTION 9.12.  COMPLETE AGREEMENT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
         SECTION 9.13.  Liability of Co-Agents and Arranger . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
         SECTION 9.14.  Termination of 1995 Short-Term Commitments  . . . . . . . . . . . . . . . . . . . . . . . . .  64
</TABLE>





Schedule I   - Facility Fees and Applicable Margins

Schedule II  - Existing Subsidiaries

Schedule III - Existing Liens

Schedule IV  - Existing Restrictions

Schedule V   - Joint Venture Debt Agreements

Schedule VI  - Outstanding Options

Exhibit A - Note

Exhibit B - Assignment and Assumption Agreement

Exhibit C - Opinion of General Counsel of the Company

Exhibit D - Opinion of Special Counsel for the Company

Exhibit E - Opinion of Special Counsel for the Agent





                                      -iv-
<PAGE>   6
                                CREDIT AGREEMENT


                 Credit Agreement dated as of March 29, 1996 among Union Texas
Petroleum Holdings, Inc., the Banks party hereto, NationsBank of Texas, N.A.,
as Agent, and Bank of America National Trust and Savings Association and Union
Bank of Switzerland, Houston Agency, as Co-Agents.

                 The parties hereto agree as follows:

                                   ARTICLE I

                                  DEFINITIONS

                 SECTION 1.01.  Definitions.  The following terms, as used
herein, have the following meanings:

                 "Acceptable Engineer" means DeGolyer & MacNaughton or such
other independent engineering firm that is mutually acceptable to the Agent and
the Company.

                 "Adjusted Equity" means the consolidated stockholders equity
of the Company and its Consolidated Subsidiaries, as determined on a
consolidated basis in accordance with generally accepted accounting principles,
adjusted to exclude (i) any cumulative foreign exchange translation
adjustments, (ii) any non-cash write-up or writedown of any assets of the
Company and its Consolidated Subsidiaries made after March 31, 1995 in
accordance with generally accepted accounting principles, and (iii) the
non-cash effect of the adoption of any change after March 31, 1995 required by
generally accepted accounting principles.

                 "Administrative Questionnaire" means, with respect to each
Bank, an administrative questionnaire in the form requested by the Agent
submitted to the Agent (with a copy to the Company) duly completed by such
Bank.

                 "Affiliate" means (i) any Person holding 5% or more of any
class of capital stock of the Company, and (ii) any Person (other than the
Company, a Subsidiary or a Partnership) directly or indirectly controlling,
controlled by or under common control with any Person described in clause (i).
As used in this definition of "Affiliate", the term "control" means the
possession, directly or indirectly, of the power to direct or cause the
direction of the management and policies of a Person, whether through ownership
of voting securities, by contract or otherwise.
<PAGE>   7
                 "Agent" means NationsBank in its capacity as agent for the
Banks hereunder and any successor in such capacity.

                 "Agreement" means this Credit Agreement dated as of March 29,
1996 among the Company, the Banks, the Agent and the Co-Agents, as amended from
time to time in accordance with the terms hereof.

                 "Applicable Lending Office" means, with respect to any Bank,
(i) in the case of its Base Rate Loans, its Domestic Lending Office, and (ii)
in the case of its Euro-Dollar Loans, its Euro-Dollar Lending Office.

                 "Applicable Margin" means, for any Interest Period for each
Euro-Dollar Loan, the rate per annum applicable to such Euro-Dollar Loan during
such Interest Period, as shown on Schedule I and based on the Rating Level in
effect on the first day of such Interest Period.

                 "Arranger" means NationsBanc Capital Markets, Inc.

                 "Asset Sale" means any sale, lease, transfer or other
disposition of any Restricted Asset by the Company or any Restricted
Subsidiary, whether such sale, lease, transfer or other disposition is direct
or indirect (such as by selling capital stock of the Subsidiary that owns such
Restricted Asset, but excluding sales of capital stock of the Company), other
than (i) farm-outs in the ordinary course of business of properties containing
substantially no proved reserves at the time of the farm-out, (ii) sales in the
ordinary course of business of Hydrocarbons after severance, (iii) sales,
transfers, leases or other dispositions of inventory and obsolete or surplus
equipment in the ordinary course of business, and (iv) sales, transfers, leases
or other dispositions to the Company or any Restricted Subsidiary if no Default
then exists or would result therefrom.

                 "Assignee" has the meaning set forth in Section 9.06(c).

                 "Assignment" means an Assignment and Assumption Agreement in
substantially the form of Exhibit B hereto.

                 "Bank" means each bank listed on the signature pages hereof,
each Assignee which becomes a Bank pursuant to Section 9.06(c), and their
respective successors.

                 "Base Rate" means, for any day, a rate per annum equal to the
higher of (i) the Corporate Base Rate for such day and (ii) the sum of 1/2 of
1% plus the Federal Funds Rate for such day.





                                      -2-
<PAGE>   8
                 "Base Rate Loan" means a Loan which bears interest as provided
in Section 2.07(a).

                 "Benefit Arrangement" means at any time an employee benefit
plan within the meaning of Section 3(3) of ERISA which is not a Plan or a
Multiemployer Plan and which is maintained or otherwise contributed to by any
member of the ERISA Group.

                 "Borrowing" has the meaning set forth in Section 1.03.

                 "Cash Interest Expense" means, for any period, the sum of (i)
the aggregate amount accrued during such period by the Company and its
Consolidated Subsidiaries for interest determined on a consolidated basis, but
excluding interest on Non-Recourse Debt and interest on Debt of Unrestricted
Subsidiaries to the extent such Debt does not constitute Debt of the Company or
any Restricted Subsidiary plus (ii) the aggregate amount paid during such
period by the Company and its Consolidated Subsidiaries for dividends on
Restricted Preferred Stock, determined on a consolidated basis.

                 "Co-Agents" means Bank of America National Trust and Savings
Association and Union Bank of Switzerland, Houston Agency in their capacities
as Co-Agents hereunder.

                 "Commitment" means, with respect to each Bank, the amount set
forth opposite the name of such Bank on the signature pages hereof (or, if such
Bank is an Assignee and its name is not set forth on the signature pages
hereof, the amount of its Commitment as set forth in the Assignment pursuant to
which it became a Bank), as such amount may be reduced from time to time
pursuant to Sections 2.09 and 2.10 or reduced or increased from time to time
pursuant to any Assignment to which it is a party.

                 "Company" means Union Texas Petroleum Holdings, Inc., a 
Delaware corporation.

                 "Company's 1995 Form 10-K" means the Company's annual report
on Form 10-K for 1995, as filed with the Securities and Exchange Commission
pursuant to the Securities Exchange Act of 1934.

                 "Consolidated Debt" means, at any date, an amount equal to (a)
the sum (without duplication) of (i) the aggregate amount of Debt (other than
Defeased Debt, Excluded Subordinated Debt not exceeding $100,000,000 and Debt
that would not constitute Debt of the Company or any of its Consolidated
Subsidiaries if clause (viii) were not included in the definition herein of
Debt) of the Company and its Consolidated               





                                      -3-
<PAGE>   9
Subsidiaries, determined on a consolidated basis as of such date, plus (ii)
the Unimar Percentage at such date of the aggregate Debt (other than Defeased
Debt and Debt that would not constitute Debt of Unimar or any of the Unimar
Restricted Subsidiaries if clause (viii) were not included in the definition
herein of Debt) of Unimar and the Unimar Restricted Subsidiaries, determined on
a consolidated basis as of such date, plus (iii) the Excess Letter of
Credit/Guarantee Amount at such date, minus (b) the sum (without duplication
and only to the extent that any of the following are included in the foregoing
clause (a)) at such date of (1) Debt of Unrestricted Subsidiaries to the extent
such Debt does not constitute Debt of the Company or any Restricted Subsidiary
plus (2) Non-Restricted Asset Non-Recourse Debt plus (3) Existing Pakistan
Non-Recourse Debt.

                 "Consolidated Subsidiary" means at any date any Subsidiary or
other entity the accounts of which would be consolidated with those of the
Company in its consolidated financial statements as of such date.

                 "Convert", "Conversion" and "Converted" each refers to (i) the
change of Loans of one Type into Loans of the other Type pursuant to Section
2.03 or Article VIII, (ii) the continuation of all Euro-Dollar Loans comprising
the same Borrowing as such for an additional Interest Period pursuant to
Section 2.03, and (iii) an election to change, pursuant to Section 2.03, the
Interest Period applicable to all Euro-Dollar Loans comprising the same
Borrowing prior to the end of the Interest Period then applicable thereto.

                 "Corporate Base Rate" means a fluctuating interest rate per
annum as shall be in effect from time to time equal to the rate of interest
publicly announced by NationsBank as its base rate, whether or not the Company
has notice thereof.  Such rate is set by NationsBank as a general reference
rate of interest, taking into account such factors as NationsBank may deem
appropriate, it being understood that many of NationsBank's commercial or other
loans are priced in relation to such rate, that it is not necessarily the
lowest or best rate actually charged to any customer and that NationsBank may
make various commercial or other loans at rates of interest having no
relationship to such rate.

                 "Debt" of any Person means at any date, without duplication,
(i) all obligations of such Person for borrowed money, (ii) all obligations of
such Person evidenced by bonds, debentures, notes or other similar instruments,
(iii) all obligations of such Person to pay the deferred purchase price of
property or services, except accrued expenses, trade accounts payable and taxes
payable arising in the ordinary course of business, (iv) the present value,
determined in accordance with generally accepted accounting principles, of the
obligations of such Person to make payments under capital leases, (v) all
obligations of such Person which shall have been outstanding for more than five
days owed to a bank or other Person in respect of





                                      -4-
<PAGE>   10
amounts theretofore paid under a letter of credit or similar instrument, (vi)
all Debt of others secured by a Lien on any asset owned by such Person whether
or not such Debt is assumed by such Person (except that Joint Venture Debt
shall for purposes of this Agreement be deemed to be Debt of Pertamina and not
of the Company or a Subsidiary), (vii) all Restricted Preferred Stock issued by
such Person or as to which such Person is otherwise liable, (viii) all Debt of
others Guaranteed by such Person, to the extent of such Guarantee, and (ix) all
obligations of such Person which have been outstanding for more than five days
to pay any margin call (or similar requirement) on any Derivative Transaction
(excluding, in the case of the Company and its Subsidiaries, such obligations
not exceeding $5,000,000 in the aggregate); provided that, neither Debt nor
Guarantee includes (a) obligations under leases other than capital leases and
under bona fide Derivative Transactions (except as provided in clause (ix)
above) and obligations with respect to take-or-pay payments theretofore
received which remain subject to cash settlement or make-up; (b) Debt of the
Company or a Subsidiary owing to the Company or a Subsidiary, except for Debt
not eliminated in consolidation pursuant to the proviso in Section 1.02; (c)
obligations under the Indonesian Participating Units; (d) any preferred stock
that does not constitute Restricted Preferred Stock; and (e) the existing
agreements relating to Joint Venture Debt set forth in the contracts described
on Schedule V of the parties thereto as to allocation of responsibility for
damages caused by reason of an act or failure to act by, or otherwise related
to, any such party, or any similar agreement hereafter entered into providing
for a similar allocation of liability in respect of similar actions or failures
to act.  The amount of Debt attributable to any Restricted Preferred Stock
shall be the maximum consideration required to be paid upon the purchase,
retirement, redemption, exchange, or conversion of the portion thereof
constituting Debt (such consideration, if other than cash, to be valued at the
fair market value thereof); provided that, in computing such consideration
there shall be excluded (A) any consideration payable solely in common stock of
the Company; (B) dividends to the extent such dividends do not materially
exceed the generally prevailing market rate (at the time of issuance of such
Restricted Preferred Stock) on preferred stock of comparable risk and maturity;
and (C) any premium payable upon any such purchase, retirement, redemption,
exchange or conversion only as a result of the exercise by the issuer of a call
provision exercisable only at the option of the issuer, if failure to exercise
such option would not have an adverse effect on the Company or any Subsidiary
pursuant to the terms of any such Restricted Preferred Stock or any documents
related thereto.

                 "Default" means any condition or event which constitutes an
Event of Default or which with the giving of notice or lapse of time or both
would, unless cured or waived, become an Event of Default.

                 "Defeased Debt" means any Debt of the Company or any
Subsidiary (i) which has been defeased in accordance with the terms of the
applicable Debt instruments, (ii) which is deemed to be extinguished under
generally accepted





                                      -5-
<PAGE>   11
accounting principles applicable to the Company or such Subsidiary, and (iii)
with respect to which the Agent has received a certificate of an officer of the
Company or such Subsidiary to the effect that the requirements of clauses (i)
and (ii) of this definition have been met as to such Debt and such evidence, if
any, in support of such certificate as the Agent may reasonably request.

                 "Derivative Transactions" means foreign exchange transactions
and commodity, currency and interest rate swaps, floors, caps, collars, forward
sales, options, other similar transactions and combinations of the foregoing.

                 "Domestic Business Day" means any day except a Saturday,
Sunday or other day on which commercial banks in New York City, San Francisco
or Houston are authorized by law to close.

                 "Domestic Lending Office" means, as to each Bank, its office
located at its address set forth in its Administrative Questionnaire (or
identified in its Administrative Questionnaire as its Domestic Lending Office)
or such other office as such Bank may hereafter designate as its Domestic
Lending Office by notice to the Company and the Agent.

                 "EBITDA" means, for any period, the sum of (i) the
consolidated net income of the Company and its Consolidated Subsidiaries for
such period before non-cash non-recurring items, gains or losses on
dispositions of assets and the cumulative effect of changes in accounting
principles plus (ii) to the extent included in the determination of such
income, the consolidated charges for such period for interest, depreciation,
depletion and amortization plus (or, if there is a benefit from income taxes,
minus) (iii) to the extent included in the determination of such income, the
amount of the provision for or benefit from income taxes; provided that in
determining such consolidated net income, such consolidated charges and such
provision for or benefit from income taxes, there shall be excluded therefrom
(to the extent otherwise included therein) (a) the net income (or loss) of,
charges for interest, depreciation, depletion and amortization of, and such
provision for or benefit from income taxes of, any Person acquired by the
Company or a Subsidiary in a pooling-of-interest transaction for any period
prior to the date of such transaction, and (b) the net income (but not loss)
of, charges for interest, depreciation, depletion and amortization of, and such
provision for (but not benefit from) income taxes of, any Person which is
subject to any contractual restriction which prevents the payment of dividends
or the making of distributions on the capital stock or other ownership
interests of such Person to the extent of such contractual restrictions.

                 "Effective Date" means the date of this Agreement, which is
March 29, 1996.





                                      -6-
<PAGE>   12
                 "Engineering Report" means a report of an Acceptable Engineer
providing an estimate of the proved reserves of Hydrocarbons attributable to
the properties of the Company and the Restricted Subsidiaries.

                 "Environmental Laws" means any and all federal, state, local
and foreign statutes, laws, regulations, ordinances, rules, judgments, orders,
decrees, permits, concessions, grants, franchises, licenses, agreements or
other governmental restrictions relating to the environment or to 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, including, without limitation, the Comprehensive
Environmental Response, Compensation, and Liability Act, the Resource
Conservation and Recovery Act, the Oil Pollution Act, and their state analogs,
in each case as they have been or may be amended.

                 "ERISA" means the Employee Retirement Income Security Act of
1974, as amended, or any successor statute.

                 "ERISA Group" means the Company and all members of a
controlled group of corporations and all trades or businesses (whether or not
incorporated) under common control which, together with the Company, are
treated as a single employer under Section 414 of the Internal Revenue Code.

                 "Euro-Dollar Business Day" means any Domestic Business Day on
which commercial banks are open for international business (including dealings
in dollar deposits) in London.

                 "Euro-Dollar Lending Office" means, as to each Bank, its
office, branch or affiliate located at its address set forth in its
Administrative Questionnaire (or identified in its Administrative Questionnaire
as its Euro-Dollar Lending Office) or such other office, branch or affiliate
of such Bank as it may hereafter designate as its Euro-Dollar Lending Office
by notice to the Company and the Agent.

                 "Euro-Dollar Loan" means a Loan which bears interest as
provided in Section 2.07(b).

                 "Event of Default" has the meaning set forth in Section 6.01.

                 "Excess Letter of Credit/Guarantee Amount" means, at any date,
the excess of (a) the sum of (i) the aggregate undrawn amount, at such date, of
all letters





                                      -7-
<PAGE>   13
of credit as to which the Company or any Restricted Subsidiary (other than
Unimar and the Unimar Restricted Subsidiaries) is the account party or in
respect of which the Company or any Restricted Subsidiary (other than Unimar
and the Unimar Restricted Subsidiaries) has Guaranteed payment plus the unpaid
drawn portions, at such date, of all such letters of credit to the extent such
drawn portions do not constitute Debt of the Company or a Restricted Subsidiary
(other than Unimar and the Unimar Restricted Subsidiaries), plus (ii) the
Unimar Percentage of the aggregate undrawn amount, at such date, of all letters
of credit as to which Unimar or any of the Unimar Restricted Subsidiaries is
the account party or in respect of which Unimar or any of the Unimar Restricted
Subsidiaries has Guaranteed payment plus the unpaid drawn portions, at such
date, of such letters of credit to the extent such drawn portions do not
constitute Debt of Unimar or any of the Unimar Restricted Subsidiaries, plus
(iii) Debt that constitutes Debt of the Company or any Restricted Subsidiary
(other than Unimar or any Unimar Restricted Subsidiary) pursuant to clause
(viii) of the definition herein of Debt, plus (iv) the Unimar Percentage at
such date of Debt that constitutes Debt of Unimar or any of the Unimar
Restricted Subsidiaries pursuant to clause (viii) of the definition herein of
Debt, over (b) $50,000,000.

                 "Excess Net Sales Proceeds" means

         (i)     with respect to any Asset Sale involving, directly or
                 indirectly, a UK Asset (a "UK Asset Sale"),

                 (a)      if, after giving effect to such Asset Sale, the
                          aggregate Net Sales Proceeds from all UK Asset Sales
                          since December 31, 1993 would be less than or equal
                          to $50,000,000 and the aggregate Net Sales Proceeds
                          from all Asset Sales since such date would be less
                          than or equal to $100,000,000, zero; or

                 (b)      if, after giving effect to such Asset Sale, the
                          aggregate Net Sales Proceeds from all UK Asset Sales
                          since December 31, 1993 ("UK Aggregate Amount") would
                          be greater than $50,000,000 or the aggregate Net
                          Sales Proceeds from all Asset Sales since such date
                          ("Total Aggregate Amount") would be greater than
                          $100,000,000, the lesser of (1) the greater of the
                          amount by which the UK Aggregate Amount exceeds
                          $50,000,000 or the amount by which the Total
                          Aggregate Amount exceeds $100,000,000 or (2) the Net
                          Sales Proceeds from such Asset Sale; and

         (ii)    with respect to any Asset Sale not involving, directly or
                 indirectly, a UK Asset,





                                      -8-
<PAGE>   14
                 (a)      if, after giving effect to such Asset Sale, the
                          aggregate Net Sales Proceeds from all Asset Sales
                          since December 31, 1993 would be less than or equal
                          to $100,000,000, zero; or

                 (b)      if, after giving effect to such Asset Sale, the
                          aggregate Net Sales Proceeds from all Asset Sales
                          since December 31, 1993 would be greater than
                          $100,000,000, the lesser of (1) the amount by which
                          such aggregate Net Sales Proceeds exceeds
                          $100,000,000 or (2) the Net Sales Proceeds from such
                          Asset Sale.

                 "Excluded Subordinated Debt" means Debt that (i) is
subordinate and junior, on terms reasonably satisfactory to the Agent, to the
Loans in all respects and (ii) has no requirement, absent a default under such
Debt, that any principal thereof be paid, purchased, redeemed, defeased,
acquired, exchanged or converted (other than exchange for or conversion to
common stock of the Company) prior to March 31, 2002.

                 "Existing Pakistan Non-Recourse Debt" means the Debt, not
exceeding the principal amount of $9,500,000, evidenced by that certain
promissory note dated December 20, 1988, issued by UT Pakistan in the original
principal amount of $21,250,000, the related Finance Agreement between UT
Pakistan and the Overseas Private Investment Corporation ("OPIC") and the
related Issuing and Paying Agency Agreement among First Trust New York National
Association (as successor to Morgan Guaranty Trust Company of New York) as
issuing and paying agent, OPIC and UT Pakistan.

                 "Fair Market Value" means with respect to any asset of the
Company or any Subsidiary at any date the open market cash purchase price that
an informed and willing purchaser would pay for such asset in an arm's length
transaction to a willing and informed owner under no compulsion to sell, all as
reasonably determined in good faith by the Company.

                 "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 Domestic
Business Day next succeeding such day; provided that (i) if such day is not a
Domestic Business Day, the Federal Funds Rate for such day shall be such rate
on such transactions on the next preceding Domestic Business Day, as so
published on the next succeeding Domestic Business Day, and (ii) if no such
rate is so published on such next succeeding Domestic Business Day, the Federal
Funds Rate for such day shall be the average rate quoted to NationsBank on such
day on such transactions as determined by the Agent.





                                      -9-
<PAGE>   15
                 "Financing Documents" means this Agreement and the Notes.

                 "Guarantee" by any Person means any obligation, contingent or
otherwise (including, without limitation, any obligation to repay to a payor or
creditor of a payor amounts previously paid to such Person by such payor), of
such Person directly or indirectly guaranteeing any Debt of any other Person or
otherwise incurred for the purpose of assuring the holder of payment of any
such Debt; provided that (i) the obligations of any Person in respect of Debt
of any Partnership in which such Person is a general partner shall not
constitute a Guarantee of such Debt so long as substantially all assets of such
Person are comprised of its Investment in such Partnership, (ii) the obligation
of a Person to transfer or restore cash to the account of a Partnership,
Subsidiary or Affiliate pursuant to periodic settlements or adjustments under
cash management practices of such Persons shall not constitute a Guarantee,
(iii) the contractual obligation of a Person to assure that a Subsidiary,
Partnership or Affiliate conducts its operations as a prudent operator shall
not constitute a Guarantee of indebtedness of the Subsidiary, Partnership or
Affiliate, (iv) the obligation of a Person to cause net amounts of cash owned
by a Subsidiary, Partnership or Affiliate to be applied to payment of
indebtedness of such Subsidiary, Partnership or Affiliate shall not constitute
a Guarantee of such indebtedness and (v) the reaffirmation to or for the
benefit of a lender of contractual obligations (as, for example, those set
forth in the Production Sharing Contracts) previously entered into in good
faith and not in contemplation of the incurrence of Debt shall not constitute a
Guarantee so long as the other arrangements entered into in connection with
such reaffirmation do not increase the likelihood that additional funds will be
required to meet such obligations (as would be the case, for example, if
revenues otherwise available to meet such obligations were dedicated to such
lender).

                 "HPG Plant" means the five-twelfths interest in the Geismar,
Louisiana olefins plant owned by UTPC and its subsidiaries, the supply and
distribution assets related to such plant and all other operating assets of
UTPC and its subsidiaries as of December 31, 1993.

                 "Hydrocarbons" means crude oil, including all kinds of
hydrocarbons and bitumens in solid or liquid form, and natural gas, including
all gaseous hydrocarbons produced from wells, and liquefied natural gas and
liquefied petroleum gases.

                 "Indonesian Participating Units" means the Indonesian
Participating Units issued by Unimar pursuant to the Indenture dated as of
September 24, 1984 between Unimar and Irving Trust Company, Trustee, as amended
and in effect on May 13, 1994, and as thereafter amended to the extent such
subsequent amendments do not change the term thereof, provide additional
security therefor, or increase the payments to be made to holders thereof.





                                      -10-
<PAGE>   16
                 "Interest Period" means, with respect to each Euro-Dollar Loan
comprising part of the same Borrowing, the period commencing on the date of
such Loan or the date of the Conversion of any Base Rate Loan into such
Euro-Dollar Loan and ending on the last day of the period selected by the
Company pursuant to the provisions below and, thereafter, each subsequent
period commencing on the last day of the immediately preceding Interest Period
(or on any other date selected by the Company pursuant to Section 2.03) and
ending on the last day of the period selected by the Company pursuant to the
provisions below and Section 2.03.  The duration of each such Interest Period
shall be 1, 2, 3 or 6 months or (subject to Section 2.02(b)) 9 or 12 months, in
each case as the Company may, upon notice received by the Agent not later than
10:00 A.M. (Houston time) on the third Euro-Dollar Business Day prior to the
first day of such Interest Period, select; provided that:

                 (a)      any Interest Period which would otherwise end on a
         day which is not a Euro-Dollar Business Day shall be extended to the
         next succeeding Euro-Dollar Business Day unless such Euro-Dollar
         Business Day falls in another calendar month, in which case such
         Interest Period shall end on the next preceding Euro-Dollar Business
         Day;

                 (b)      any Interest Period which begins on the last
         Euro-Dollar Business Day of a calendar month (or on a day for which
         there is no numerically corresponding day in the calendar month at the
         end of such Interest Period) shall end on the last Euro-Dollar
         Business Day of a calendar month;

                 (c)      the Company may not select an Interest Period for any
         Loan if the last day of such Interest Period would be after March 15,
         1998; and

                 (d)      Interest Periods for all Loans comprising the same
         Borrowing shall commence on the same date and shall be of the same
         duration.

                 "Internal Revenue Code" means the Internal Revenue Code of
1986, as amended, or any successor statute.

                 "Investment" means any investment in any Person, whether by
means of share purchase, capital contribution, loan, advance, Guarantee or
otherwise.  It is understood that a joint operating agreement or similar
arrangement with respect to Hydrocarbon properties or the HPG Plant does not
constitute a Person and hence that payments in respect of the acquisition or
maintenance of an interest in such Hydrocarbon properties or the HPG Plant do
not constitute an Investment.





                                      -11-
<PAGE>   17
                 "Joint Venture Debt" means obligations secured by a Lien on
the interests of the Company or a Subsidiary, as the case may be, arising under
either of the Production Sharing Contracts or any related supply contracts, if
such Lien covers ratably the interests of Pertamina and all production sharing
contractors thereunder.

                 "Lien" means, with respect to any asset, any mortgage, lien,
pledge, charge, security interest or encumbrance of any kind in respect of such
asset (including, without limitation, any production payment, advance payment
or similar arrangement with respect to minerals in place), whether or not
filed, recorded or otherwise perfected under applicable law.  For the purposes
of this Agreement, the Company or any Subsidiary shall be deemed to own subject
to a Lien any asset which it has acquired or holds subject to the interest of a
vendor or lessor under any conditional sale agreement, capital lease or other
title retention agreement relating to such asset.  The right of set-off,
whether by operation of law or by contract, does not constitute a Lien unless
there is a related obligation to maintain a deposit of cash or other assets in
respect of which such right of set-off may be exercised.

                 "Loan" means a loan made by a Bank to the Company pursuant to
section 2.01 and refers to a Base Rate Loan or a Euro-Dollar Loan (each of
which shall be a "Type" of Loan), and "Loans" means Base Rate Loans or
Euro-Dollar Loans or any combination of the foregoing.

                 "London Interbank Offered Rate" has the meaning set forth in 
Section 2.07(b).

                 "material" means, with respect to any matter so characterized
herein, that such matter would reasonably be expected to be significant to a
Bank in determining whether to enter into this Agreement or to extend credit
hereunder.

                 "Material Debt" means Debt of the Company and/or any one or
more Restricted Subsidiaries (other than Non-Recourse Debt) in an aggregate
principal amount equal to or greater than $15,000,000, whether incurred under
one or more related or unrelated documents or instruments.

                 "Material Plan" means at any time a Plan or Plans having
aggregate Unfunded Liabilities in excess of $15,000,000.

                 "Moody's" means Moody's Investors Service, Inc. or any
successor to its debt ratings business.

                 "Multiemployer Plan" means at any time an employee pension
benefit plan within the meaning of Section 4001(a)(3) of ERISA to which any
member of the ERISA Group is then making or accruing an obligation to make
contributions or has





                                      -12-
<PAGE>   18
within the preceding five plan years made contributions, including for these
purposes any Person which ceased to be a member of the ERISA Group during such
five year period.

                 "NationsBank" means NationsBank of Texas, N.A., a national 
banking association.

                 "Net Sales Proceeds" means, with respect to any Asset Sale,
the Fair Market Value of the Restricted Asset that is sold, leased, transferred
or otherwise disposed of in such Asset Sale, minus the sum of (i) all
reasonable fees, commissions and expenses incurred by the Company or any
Subsidiary as a result of or in connection with such Asset Sale and (ii) all
taxes required to be paid by the Company or any Subsidiary as a result of such
Asset Sale.

                 "Non-Recourse Debt" means, at any date, (a) the aggregate
amount at such date of Debt of the Company or a Subsidiary (other than Unimar
and each Unimar Subsidiary) and (b) the Unimar Percentage of the aggregate
amount at such date of all Debt of each of Unimar and each Unimar Subsidiary,
in respect of which in the case of either (a) or (b) (i) the recourse of the
holder of such Debt, whether direct or indirect and whether contingent or
otherwise, shall be effectively limited to Non-Restricted Assets (or, in the
case of the Existing Pakistan Non-Recourse Debt, the assets described in
Schedule III) and (ii) in the case of any such Debt incurred after the date of
this Agreement, the Company shall have, at or prior to the time of incurrence
thereof, notified the Agent of such incurrence and delivered to the Agent a
certificate of an officer of the Company certifying that such Debt constitutes
Non-Recourse Debt (or that such Debt will be converted into Non-Recourse Debt
at some specified time or upon the occurrence of some specified event);
provided that, if any such Debt is secured by any interest in a license,
concession, production sharing contract or other right and any of the
Restricted Assets consists of an interest in such license, concession,
production sharing contract or other right, then the agreements evidencing such
Debt must provide that default under such Debt will not impair or affect such
license, concession, production sharing contract or other right.  In the case
of any Non-Recourse Debt incurred after the date of this Agreement, such
limitation on recourse (i) must be set forth in the instrument evidencing such
Debt, and (ii) must be on terms acceptable to the Agent as evidenced by the
written approval thereof by the Agent (which approval will not be unreasonably
withheld, and in deciding whether to approve such terms the Agent will, if
requested by the Company, take into account what terms are usual and customary
in non-recourse financings) and in any event must provide that the holder of
such Debt waives, to the extent such holder may effectively do so, such
holder's right to elect recourse treatment under 11 U.S.C. Section  1111(b)
unless such holder obtains the prior written consent of the Required Banks.
For avoidance of doubt, (a) if any such Debt is Guaranteed by the Company or a
Restricted Subsidiary in a limited amount, the excess over such amount (but
only the excess) constitutes Non-Recourse





                                      -13-
<PAGE>   19
Debt, and (b) Debt shall not be determined to not be Non-Recourse Debt solely
as a result of the existence of either of the following: (i) an agreement by a
direct or indirect parent corporation to repay to a subsidiary amounts received
by such parent corporation from such subsidiary in the event such subsidiary
has a need for such amounts in future periods or (ii) an agreement by a direct
or indirect parent corporation to cause a subsidiary to comply with such
subsidiary's contractual obligations so long as the parent corporation is not
obligated to contribute funds to the subsidiary to enable it to comply with
such contractual obligations and has not otherwise Guaranteed such obligations.

                 "Non-Restricted Asset Non-Recourse Debt" means, at any date,
the aggregate amount at such date of Non-Recourse Debt as to which the
recourse of the holder is limited exclusively to Non-Restricted Assets as
contemplated by clause (i) of the first sentence of the definition of
Non-Recourse Debt.

                 "Non-Restricted Assets" means all assets of the Company and
its Subsidiaries other than Restricted Assets.

                 "Non-UK Asset" means any Restricted Asset other than a UK
Asset.

                 "Notes" means promissory notes of the Company, substantially
in the form of Exhibit A hereto, evidencing the obligation of the Company to
repay the Loans made to it, and "Note" means any one of such promissory notes
issued hereunder.

                 "Notice of Borrowing" has the meaning specified in Section
2.02.

                 "Operating Cash Flow" means, with respect to any period, an
amount equal to

                 (i) the "net cash (required) provided by operating activities
                 before changes in other assets and liabilities" of the Company
                 and its Consolidated Subsidiaries for such period, that should
                 be reflected in the consolidated statement of cash flows of
                 the Company and its Consolidated Subsidiaries for such period
                 prepared in accordance with generally accepted accounting
                 principles on substantially the same basis as the consolidated
                 statement of cash flows of the Company and its Consolidated
                 Subsidiaries for the year ended December 31, 1995 as set forth
                 in the Company's 1995 Form 10-K; provided that in determining
                 such "net cash (required) provided by operating activities
                 before changes in other assets and liabilities" there shall be
                 excluded therefrom (to the extent otherwise included therein)
                 (a) the portion of such net cash provided by assets securing
                 any Non-Recourse Debt other than the Existing Pakistan
                 Non-Recourse Debt, (b) the net cash provided or required by
                 operating activities before changes in other assets and





                                      -14-
<PAGE>   20
                 liabilities of any Person acquired by the Company or a
                 Subsidiary in a pooling-of-interest transaction for any period
                 prior to the date of such transaction, and (c) the net cash
                 provided by operating activities before changes in other
                 assets and liabilities of any Person which is subject to any
                 contractual restriction which prevents the payment of
                 dividends or the making of distributions on the capital stock
                 or other ownership interests of such Person to the extent of
                 such contractual restrictions,

                 plus (ii) to the extent included in the determination of the
                 "net cash (required) provided by operating activities before
                 changes in other assets and liabilities" for such period in
                 accordance with the foregoing clause (i), exploration expenses
                 incurred by the Company or any Consolidated Subsidiary during
                 such period other than (a) exploration expenses incurred in
                 connection with assets securing any Non-Recourse Debt other
                 than the Existing Pakistan Non-Recourse Debt, (b) the
                 exploration expenses of any Person acquired by the Company or
                 a Subsidiary in a pooling-of-interest transaction for any
                 period prior to the date of such transaction, and (c) the
                 exploration expenses of any Person which is subject to any
                 contractual restriction which prevents the payment of
                 dividends or the making of distributions on the capital stock
                 or other ownership interests of such Person to the extent of
                 such contractual restrictions,

                 plus (or, if cash is required by equity investee, minus) (iii)
                 the amount of the "cash (required) provided by equity
                 investee" of the Company and its Consolidated Subsidiaries for
                 such period, that should be reflected in the consolidated
                 statement of cash flows of the Company and its Consolidated
                 Subsidiaries for such period prepared in accordance with
                 generally accepted accounting principles on substantially the
                 same basis as the consolidated statement of cash flows of the
                 Company and its Consolidated Subsidiaries for the year ended
                 December 31, 1995 as set forth in the Company's 1995 Form
                 10-K, excluding the effect of any cash required by such equity
                 investee for the payment of the principal of its Debt and any
                 cash provided by such equity investee from incurrence of its
                 Debt,

                 minus (iv) dividends on preferred stock paid during such
                 period by the Company or any Consolidated Subsidiary,
                 determined on a consolidated basis.

                 "Other Credit Agreement" means the Second Amended and Restated
Credit Agreement dated as of March 29, 1996 among the Company, NationsBank, as
agent thereunder, and the co-agents and the banks parties thereto, as amended
or





                                      -15-
<PAGE>   21
otherwise modified from time to time, providing a $450,000,000 credit facility
to the Company.

                 "Other Credit Agreement Commitments" means the "Commitments"
as defined in the Other Credit Agreement.

                 "Parent" means, with respect to any Bank, any Person
controlling such Bank.

                 "Participant" has the meaning set forth in Section 9.06(b).

                 "Partnership" means any general or limited partnership which
is accounted for on the equity method in the Company's consolidated financial
statements and in which the Company or a Subsidiary is a general partner.

                 "PBGC" means the Pension Benefit Guaranty Corporation or any
entity succeeding to any or all of its functions under ERISA.

                 "Person" means an individual, a corporation, a partnership, an
association, a trust or any other entity or organization, including a
government or political subdivision or an agency or instrumentality thereof.
It is understood that a joint operating agreement or similar arrangement with
respect to Hydrocarbon properties or the HPG Plant does not constitute a
Person.

                 "Plan" means at any time an employee pension benefit plan
(other than a Multiemployer Plan) which is covered by Title IV of ERISA or
subject to the minimum funding standards under Section 412 of the Internal
Revenue Code and either (i) is maintained, or contributed to, by any member of
the ERISA Group for employees of any member of the ERISA Group or (ii) has at
any time within the preceding five years been maintained, or contributed to, by
any Person which was at such time a member of the ERISA Group for employees of
any Person which was at such time a member of the ERISA Group.

                 "Production Sharing Contracts" means the production sharing
contracts pertaining to certain operations in Indonesia filed as Exhibits
10.102 and 10.103 to the Company's quarterly report on Form 10-Q for the
quarter ending June 30, 1990, as filed with the Securities and Exchange
Commission pursuant to the Securities Exchange Act of 1934.

                 "Rating Level" means the applicable category of rating level
contained in Schedule I (subject, however, to the footnotes on Schedule I),
based on the ratings of the senior unsecured long-term debt of the Company by
S&P or Moody's or both.





                                      -16-
<PAGE>   22
                 "Reference Banks" means the principal London offices of
NationsBank, Bank of America National Trust and Savings Association and Union
Bank of Switzerland and such substitute Bank or Banks as may be mutually agreed
to by the Company and the Agent, and "Reference Bank" means any one of such
Reference Banks.

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

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

                 "Required Banks" means at any time Banks having at least 51%
of the aggregate amount of the Commitments or, if the Commitments shall have
been terminated, holding Notes evidencing at least 51% of the aggregate unpaid
principal amount of the Loans.

                 "Restricted Assets" means (1) all proved reserves of the
Company and the Subsidiaries as of December 31, 1993 in Indonesia, the United
Kingdom (including the United Kingdom Sector of the North Sea) and Pakistan,
(2) all licenses, concessions, production sharing contracts and other rights
pertaining to any such proved reserves (excluding the portion thereof that does
not pertain to any of such proved reserves, if such portion can be severed
without material adverse consequences on the portion pertaining to such proved
reserves), (3) equipment used in the production of any such proved reserves or
in the transportation of production from any such proved reserves if such
equipment is a fixture or otherwise attached to realty, constitutes all or a
part of any pipeline or related equipment, is all or part of a production
platform or related equipment or is equipment similar to any of the foregoing
or used for a similar purpose, and (4) the HPG Plant.

                 "Restricted Payment" means (i) any dividend or other
distribution on any shares of the Company's capital stock (except dividends
payable solely in shares of its common stock), or (ii) any payment on account
of the purchase, redemption, retirement or acquisition of (a) any shares of the
Company's capital stock or (b) any option, warrant or other right to acquire
shares of the Company's capital stock (except any such payment made solely in
shares of its common stock); provided that payments of stock-related and other
employee benefits (including purchases by the Company of its common stock in
connection with the payment of such benefits) in the ordinary course of
business to employees of the Company or a Subsidiary shall not be deemed
Restricted Payments.

                 "Restricted Preferred Stock" means (i) all preferred stock
which (a) is subject to purchase, retirement, redemption, exchange or
conversion (other than





                                      -17-
<PAGE>   23
exchange for or conversion to common stock of the Company), in whole or in part
under any circumstance whatsoever (other than purchase, retirement, redemption,
exchange or conversion by the issuer thereof, at the sole option of such
issuer, if failure to exercise such option would not have an adverse effect on
the Company or any Subsidiary pursuant to the terms of any such preferred stock
or any documents related thereto) and (b) provides for dividends materially in
excess of the generally prevailing market dividend rate (at the time of
issuance of such preferred stock) for preferred stock of comparable risk and
maturity, and (ii) the portion of all other preferred stock which is subject to
purchase, retirement, redemption, exchange or conversion (other than exchange
for or conversion to common stock of the Company) at any date or dates on or
prior to March 31, 2002 under any circumstance whatsoever (other than purchase,
retirement, redemption, exchange or conversion by the issuer thereof, at the
sole option of such issuer, if failure to exercise such option would not have
an adverse effect on the Company or any Subsidiary pursuant to the terms of any
such preferred stock or any documents related thereto).  For avoidance of
doubt, to the extent that any shares of Restricted Preferred Stock are
exchanged for or converted to common stock of the Company and as a consequence
such shares of Restricted Preferred Stock are cancelled, such shares shall no
longer constitute Restricted Preferred Stock.

                 "Restricted Subsidiaries Recourse Debt" means, at any date,
the sum of (a) the aggregate amount of all Debt (other than (i) Non-Recourse
Debt, (ii) any Guarantee of Debt of the Company (including the Loans) and (iii)
the amount, if any, by which the Guarantees of the Restricted Subsidiaries
(other than Unimar and the Unimar Restricted Subsidiaries) included in the
determination of Excess Letter of Credit/Guarantee Amount exceeds the Excess
Letter of Credit/Guarantee Amount) of each Restricted Subsidiary (other than
Unimar and the Unimar Restricted Subsidiaries), determined on a consolidated
basis as of such date, and (b) the Unimar Percentage of the aggregate amount of
all Debt (other than (i) Non-Recourse Debt, (ii) any Guarantee of Debt of the
Company and (iii) the amount, if any, by which the Unimar Percentage of the
Guarantees of Unimar and the Unimar Restricted Subsidiaries included in the
determination of Excess Letter of Credit/Guarantee Amount exceeds the Excess
Letter of Credit/Guarantee Amount) of Unimar and the Unimar Restricted
Subsidiaries, determined on a consolidated basis as of such date.

                 "Restricted Subsidiary" means each Person listed in Part B of
Schedule II hereto and each Subsidiary that owns directly or indirectly any
interest in any Restricted Assets or any Restricted Subsidiary; provided that a
Restricted Subsidiary shall cease to be such at such time as it is converted to
an Unrestricted Subsidiary pursuant to Section 5.19 or ceases to be a
Subsidiary as a result of a transaction permitted by Section 5.14.

                 "Restricted Transfer" means (i) any Investment in an
Affiliate, any Unrestricted Subsidiary or any subsidiary of an Unrestricted
Subsidiary, but excluding





                                      -18-
<PAGE>   24
to the extent otherwise included in the foregoing, Investments in Unimar and
the Unimar Subsidiaries, or (ii) any payment by the Company or any Subsidiary,
directly or indirectly, in respect of Non-Recourse Debt to the extent such
Person is not legally obligated to make such payment by the terms of such Debt,
or solely in the case of Unimar, Unistar, Inc. or any of the Unimar
Subsidiaries, to the extent such Person is not legally obligated to fund such
payment under the terms of the Unimar Partnership Agreement.

                 "Revolving Credit Period" means the period from and including
the Effective Date to but not including the Termination Date.

                 "S&P" means Standard & Poor's Ratings Group, a division of
McGraw-Hill, Inc. or any successor to its debt rating business.

                 "Subsidiary" means (a) Unimar and the Unimar Subsidiaries
(except at such times as the Company does not own, directly or indirectly, any
of the ownership interest in Unimar) and (b) any corporation or other entity of
which securities or other ownership interests having ordinary voting power to
elect a majority of the board of directors or other persons performing similar
functions are at the time directly or indirectly owned by the Company, it being
understood that the power to elect exactly 50% of the board of directors or
such other persons does not constitute a "majority" as used herein.

                 "Termination Date" means March 15, 1997, or, if such day is
not a Euro-Dollar Business Day, the Termination Date shall be the next
preceding Euro-Dollar Business Day.

                 "Type" has the meaning specified in the definition of Loan.

                 "UK Assets" means all Restricted Assets of UTPL as of December
31, 1993.

                 "Unfunded Liabilities" means, with respect to any Plan at any
time, the amount (if any) by which (i) the present value of all benefits under
such Plan as determined by such Plan's actuary exceeds (ii) the fair market
value of all Plan assets allocable to such benefits (excluding any accrued but
unpaid contributions), all determined as of the then most recent valuation date
for such Plan, but only to the extent that such excess represents a potential
liability of a member of the ERISA Group to the PBGC or any other Person under
Title IV of ERISA if such Plan terminated as of such date.

                 "Unimar" means Unimar Company, a partnership organized and
existing under the laws of Texas.





                                      -19-
<PAGE>   25
                 "Unimar Partnership Agreement" means the Amended and Restated
Agreement of General Partnership of Unimar dated as of September 11, 1990
between Unistar, Inc. and LASMO (USTAR) Inc. (formerly Ultrastar, Inc.), as
amended from time to time.

                 "Unimar Percentage" means, at any date, the aggregate
percentage ownership interest in Unimar owned at such date by the Company and
the Subsidiaries.

                 "Unimar Restricted Subsidiary" means any Unimar Subsidiary
that is also a Restricted Subsidiary at the relevant date.

                 "Unimar Subsidiary" means any corporation or other entity of
which securities or other ownership interests having ordinary voting power to
elect a majority of the board of directors or other persons performing similar
functions are at the time directly or indirectly owned by Unimar, it being
understood that the power to elect exactly 50% of the board of directors or
such other persons does not constitute a majority as used herein.

                 "Unrestricted Subsidiary" means any Subsidiary which is not a 
Restricted Subsidiary.

                 "UT Pakistan" means Union Texas Pakistan, Inc., a Delaware 
corporation.

                 "UTPC" means Union Texas Products Corporation, a Delaware
corporation.

                 "UTPL" means Union Texas Petroleum Limited, an English
company.

                 SECTION 1.02.  Accounting Terms and Determinations.  Unless
otherwise specified herein, all accounting terms used herein shall be
interpreted, all accounting determinations hereunder shall be made, and all
financial statements required to be delivered hereunder shall be prepared in
accordance with generally accepted accounting principles as in effect from time
to time, applied on a basis consistent with the most recent audited
consolidated financial statements of the Company and its Consolidated
Subsidiaries delivered to the Banks (except for changes concurred in by the
Company's independent public accountants); provided that in any determination
of Consolidated Debt if (i) the Company or any Restricted Subsidiary owes any
Debt to an Unrestricted Subsidiary which would otherwise be eliminated in such
determination of Consolidated Debt (the "intercompany Debt") (other than Debt
in an amount not exceeding $10,000,000 in the aggregate at any time and
representing advances by the Unrestricted Subsidiaries to the Company or a
Restricted Subsidiary made in the ordinary course of the cash management
practices of the Company and its Subsidiaries) and (ii) such Unrestricted
Subsidiary owes, at the date of determination, any Debt for





                                      -20-
<PAGE>   26
borrowed money to a Person other than the Company or a Subsidiary (the "third
party Debt") (other than any such Debt that also constitutes Debt of the
Company or a Restricted Subsidiary), then an amount equal to the lesser of (1)
such intercompany Debt and (2) such third party Debt, shall not be eliminated
in such determination of Consolidated Debt.

                 SECTION 1.03.  Types of Borrowings.  The term "Borrowing"
denotes the aggregate of Loans made by Banks to the Company pursuant to Article
II on a single date, of a single Type and, if such Loans are Euro-Dollar Loans,
for a single Interest Period.  Borrowings are classified for purposes of this
Agreement by reference to the pricing of Loans comprising such Borrowing (e.g.,
a "Euro-Dollar Borrowing" is a Borrowing comprised of Euro-Dollar Loans).

                 SECTION 1.04.  Miscellaneous.  The words "hereof", "herein"
and "hereunder" and words of similar import when used in this Agreement shall
refer to this Agreement as a whole and not to any particular provision of this
Agreement, and Article, Section, Schedule and Exhibit references are to
Articles and Sections of and Schedules and Exhibits to this Agreement, unless
otherwise specified.  The term "including" as used herein means "including
without limitation".  Definitions of terms defined herein shall be applicable
to both the singular and plural forms of the terms defined as appropriate.
References to "directly or indirectly" in respect of ownership of any interest
in any assets shall include, without limitation, direct ownership, indirect
ownership through capital stock or other ownership interest (whether through
one or more levels of subsidiaries, affiliates or other Persons) and any other
direct or indirect ownership arrangement.

                 SECTION 1.05.  Unimar.  To the extent this Agreement or any
other Financing Document obligates the Company or a Subsidiary to cause Unimar
and the Unimar Subsidiaries to take any action, such obligation shall be
satisfied if (a) the Company votes (or causes a Subsidiary to vote) the Unimar
Percentage in a manner consistent with the obligations of the Company and the
Subsidiaries under the Financing Documents and (b) any representative of the
Company sitting on any management board or board of directors of Unimar or any
of the Unimar Subsidiaries votes, as a member of such management board or board
of directors, in a manner consistent with the obligations of the Company and
the Subsidiaries under the Financing Documents.

                 SECTION 1.06.  Ratings.  A rating, whether public or private,
by S&P or Moody's shall be deemed to be in effect on the date of announcement
or publication by S&P or Moody's, as the case may be, of such rating or, in the
absence of such announcement or publication, on the effective date of such
rating and will remain in effect until the effective date of any change in such
rating.  In the event the standards for any rating by S&P or Moody's are
revised, or such rating is designated differently (such as by changing letter
designations to numerical designations), then the references





                                      -21-
<PAGE>   27
herein to such rating shall be changed to the revised or redesignated rating
for which the standards are closest to, but not lower than, the standards at
the date hereof for the rating which has been revised or redesignated, all as
determined by the Agent in good faith.  Long-term debt supported by a letter of
credit, guaranty (other than guaranties of Subsidiaries) or other similar
credit enhancement mechanism shall not be considered as senior unsecured
long-term debt.


                                   ARTICLE II

                                  THE CREDITS

                 SECTION 2.01.  Commitments to Lend.  During the Revolving
Credit Period each Bank severally agrees, on the terms and conditions set forth
in this Agreement, to make loans to the Company pursuant to this Section from
time to time in amounts such that the aggregate principal amount of Loans by
such Bank at any one time outstanding to the Company shall not exceed the
amount of such Bank's Commitment at such time.  Each Borrowing under this
Section shall be in an aggregate principal amount of $10,000,000 or any larger
multiple of $1,000,000 (except that any such Borrowing may be, subject to the
other terms hereof, in the aggregate amount of the remaining unused
Commitments) and shall be made from the several Banks ratably in proportion to
their respective Commitments.  Within the foregoing limits, the Company may
borrow under this Section, repay (whether pursuant to Section 2.10 or
otherwise), or to the extent permitted by Section 2.11, prepay Loans and
reborrow at any time during the Revolving Credit Period under this Section.

                 SECTION 2.02.  Notice of Borrowings.  (a) The Company shall
give the Agent notice (a "Notice of Borrowing") not later than 10:00 A.M.
(Houston time) on (x) the date of each Base Rate Borrowing, and (y) the third
Euro-Dollar Business Day before each Euro-Dollar Borrowing, specifying:

                 (i)      the date of such Borrowing, which shall be a Domestic
         Business Day in the case of a Base Rate Borrowing or a Euro-Dollar
         Business Day in the case of a Euro-Dollar Borrowing,

                 (ii)     the aggregate amount of such Borrowing,

                 (iii)    whether the Loans comprising such Borrowing are to be
         Base Rate Loans or Euro-Dollar Loans, and

                 (iv)     in the case of a Euro-Dollar Borrowing, the duration
         of the initial Interest Period applicable thereto, subject to the
         provisions of the definition of Interest Period.





                                      -22-
<PAGE>   28
Notwithstanding the foregoing, not more than ten Euro-Dollar Borrowings shall
be outstanding at any one time, and any Borrowing which would exceed such
limitation shall be made as a Base Rate Borrowing.

                 (b)      If requested to do so by the Company through the
Agent at least ten Euro-Dollar Business Days before the first day of a proposed
Interest Period for Euro-Dollar Loans, each Bank will advise the Agent before
10:00 A.M. (Houston time) on the sixth Euro-Dollar Business Day preceding the
date of such proposed Interest Period as to whether, if the Company selects a
specified duration of nine or twelve months for such Interest Period, such Bank
expects that deposits in dollars with a corresponding term will be available to
it in the relevant market on the first day of such Interest Period in the
amount required to fund its Loan to which such Interest Period would apply.
Unless a Bank responds by such time to the effect that it expects such deposits
will not be available to it, the Company shall be entitled to select such
proposed duration for such Interest Period.

                 SECTION 2.03.  Conversions.  (a)  The Company may on any
Euro-Dollar Business Day, upon notice given to the Agent no later than 10:00
A.M. (Houston time) on the third Euro-Dollar Business Day prior to the date of
the proposed Conversion and subject to the provisions of Section 2.02 and
Article VIII and the other provisions hereof, Convert all Loans comprising one
or more Borrowings; provided that (i) Loans comprising a Borrowing may not be
Converted if after giving effect to such Conversion, such Borrowing would be a
Euro-Dollar Borrowing and the outstanding principal amount of such Borrowing
would be less than $10,000,000 and (ii) no Conversion (other than changing
Euro-Dollar Loans into Base Rate Loans) may be made if any Event of Default is
then existing.  Each such notice of a Conversion shall, within the restrictions
specified above, specify (i) the date of such Conversion, (ii) the Loans to be
Converted, (iii) if after giving effect to such Conversion, such Borrowing
would be a Euro-Dollar Borrowing, the commencement date and duration of the
proposed Interest Period for each Loan comprising such Borrowing, and (iv) the
nature of such Conversion (i.e., whether such Conversion is a change of Loans
of one Type into another Type, a continuation of Euro-Dollar Loans as such for
an additional Interest Period or an election to change an Interest Period).
Each such notice shall be irrevocable.

                 (b)      If the aggregate unpaid principal amount of
Euro-Dollar Loans comprising any Borrowing shall be reduced by payment or
prepayment or otherwise, to less than $10,000,000, such Loans shall
automatically, on the last day of the then existing Interest Period therefor,
Convert into Base Rate Loans.

                 (c)      If the Company shall fail to select the duration of
any Interest Period for any Euro-Dollar Loans in accordance with the provisions
contained in the definition of "Interest Period" in Section 1.01, or if there
shall be any Event of Default,





                                      -23-
<PAGE>   29
such Loans will automatically on the last day of the then existing Interest
Period therefor, Convert into Base Rate Loans.

                 SECTION 2.04.  Notice to Banks; Funding of Loans.

                 (a)      Upon receipt of a Notice of Borrowing, the Agent
shall promptly, (by no later than 10:30 A.M.  (Houston time) by telephone or
facsimile transmission) notify each Bank of the contents thereof and of such
Bank's share of such Borrowing and such Notice of Borrowing shall not
thereafter be revocable by the Company.

                 (b)      Not later than 12:00 Noon (Houston time) on the date
of each Borrowing, each Bank shall (except as provided in subsection (c) of
this Section) make available its share of such Borrowing, in Federal or other
funds immediately available in Houston, to the Agent at its address specified
in or pursuant to Section 9.01.  Unless the Agent determines that any
applicable condition specified in Article III has not been satisfied, the Agent
will make the funds so received from the Banks available to the Company at the
Agent's aforesaid address.

                 (c)      If any Bank makes a new Loan hereunder to the Company
on a day on which the Company is to repay all or any part of an outstanding
Loan from such Bank, such Bank shall apply the proceeds of its new Loan to make
such repayment and only an amount equal to the difference (if any) between the
amount being borrowed by the Company and the amount being repaid shall be made
available by such Bank to the Agent as provided in subsection (b), or remitted
by the Company to the Agent as provided in Section 2.12, as the case may be.

                 (d)      Unless the Agent shall have received notice from a
Bank prior to the date of any Borrowing that such Bank will not make available
to the Agent such Bank's share of such Borrowing, the Agent may assume that
such Bank has made such share available to the Agent on the date of such
Borrowing in accordance with subsections (b) and (c) of this Section 2.04 and
the Agent may, in reliance upon such assumption, make available to the Company
on such date a corresponding amount.  If and to the extent that such Bank shall
not have so made such share available to the Agent, such Bank and the Company
severally agree to repay to the Agent forthwith on demand such corresponding
amount together with interest thereon, for each day from the date such amount
is made available to the Company until the date such amount is repaid to the
Agent, at (i) in the case of the Company, a rate per annum equal to the higher
of the Federal Funds Rate and the interest rate applicable thereto pursuant to
Section 2.07 and (ii) in the case of such Bank, the Federal Funds Rate.  If
such Bank shall repay to the Agent such corresponding amount, such amount so
repaid shall constitute such Bank's Loan included in such Borrowing for
purposes of this Agreement.





                                      -24-
<PAGE>   30
                 SECTION 2.05.  Notes.  (a)  The Loans of each Bank to the
Company shall be evidenced by a single Note of the Company payable to the order
of such Bank for the account of its Applicable Lending Office in an amount
equal to the aggregate unpaid principal amount of such Bank's Loans to the
Company.

                 (b)      Each Bank may, by notice to the Company and the
Agent, request that its Loans of a particular Type payable to such Bank (or
such lending office, agency or branch of such Bank as such Bank may specify in
such request) be evidenced by a separate Note of the Company in an amount equal
to the aggregate unpaid principal amount of such Loans.  Each such Note shall
be in substantially the form of Exhibit A hereto with appropriate modifications
to reflect the fact that it evidences solely Loans of the relevant Type.  Any
Bank that receives multiple Notes pursuant to this Section 2.05(b) agrees that:
(1) the aggregate principal amount payable by the Company under such Notes
shall never exceed the aggregate principal amount of the Loans owed to such
Bank (including, if applicable, the separate lending offices, agencies or
branches of such Bank) and (2) the payees of the Notes issued at the request of
such Bank shall enjoy no greater rights (voting or otherwise) than such Bank
would enjoy in the absence of such request and such payees (including, if
applicable, the separate lending offices, agencies or branches of such Bank)
shall be considered a single Bank for purposes of this Agreement.  Each
reference in this Agreement to the "Note" of such Bank shall be deemed to refer
to and include any or all of such Notes, as the context may require.

                 (c)      Upon receipt of each Bank's Note pursuant to Section
3.01(b), the Agent shall mail or send by private delivery service such Note to
such Bank.  Each Bank shall record the date, amount and Type of each Loan made
by it to the Company and the date and amount of each payment of principal made
with respect thereto, and prior to any transfer of its Note shall endorse on
the schedule forming a part thereof appropriate notations to evidence the
foregoing information with respect to each such Loan then outstanding; provided
that the failure of any Bank to make any such recordation or endorsement shall
not affect the obligations of the Company under any of the Financing Documents.
Each Bank is hereby irrevocably authorized by the Company so to endorse any
Note and to attach to and make a part of any Note a continuation of any such
schedule as and when required.

                 SECTION 2.06.  Maturity of Loans.  Each Loan shall mature, and
the principal amount thereof shall be due and payable, on March 15, 1998.

                 SECTION 2.07.  Interest Rates.  The Company shall pay interest
on the unpaid principal amount of each Loan from the date of such Loan until
such principal amount shall be paid in full, at the following rates per annum:

                 (a)      If such Loan is a Base Rate Loan, for each day that 
such Loan is a Base Rate Loan, at a rate per annum equal to the sum of (i) the
Base Rate for such day





                                      -25-
<PAGE>   31
plus (ii) at such times as any Event of Default exists, 1%.  Such interest
shall be payable quarterly on each March 31, June 30, September 30 and December
31 and on the date such Base Rate Loan is Converted or paid in full.  Any
overdue interest on any Base Rate Loan shall bear interest, payable on demand,
for each day until paid at a rate per annum equal to the sum of 1% plus the
otherwise applicable rate for such day.

                 (b)      If such Loan is a Euro-Dollar Loan, at a rate per
annum equal at all times during any Interest Period for such Loan to the sum of
(i) the applicable London Interbank Offered Rate plus (ii) the Applicable
Margin for such Interest Period plus (iii) at such times as any Event of
Default exists, 1%; provided that any overdue principal of or interest on any
Euro-Dollar Loan shall bear interest, payable on demand, for each day from and
including the date payment thereof was due to but excluding the date of actual
payment, at a rate per annum equal to the sum of 1% plus the higher of (x) the
sum of the London Interbank Offered Rate applicable to such Loan plus the
Applicable Margin applicable to an Interest Period of a Euro-Dollar Loan if
such Euro-Dollar Loan were to commence on such day and (y) the sum of (1) the
average (rounded upward, if necessary, to the next higher 1/16 of 1%) of the
respective rates per annum at which one day (or, if such amount due remains
unpaid more than three Euro-Dollar Business Days, then for such other period of
time not longer than three months as the Agent may select) deposits in dollars
in an amount approximately equal to such overdue payment due to each of the
Reference Banks are offered to such Reference Bank in the London interbank
market for the applicable period determined as provided above plus (2) the
Applicable Margin applicable to an Interest Period of a Euro-Dollar Loan if
such Euro-Dollar Loan were to commence on such day (or, if the circumstances
described in clause (a) or (b) of Section 8.01 shall exist, at a rate per annum
equal to the sum of 1% plus the rate applicable to Base Rate Loans for such
day).  Such interest shall be payable for each Interest Period on the last day
thereof and, if such Interest Period is longer than three months, at intervals
of three months after the first day thereof.

                 The "London Interbank Offered Rate" applicable to any Interest
Period means the arithmetic 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 Euro-Dollar Business Days
before the first day of such Interest Period in an amount approximately equal
to the principal amount of the Euro-Dollar Loan of such Reference Bank to which
such Interest Period is to apply and for a period of time comparable to such
Interest Period.

                 (c)      The Agent shall determine each interest rate
applicable to the Loans hereunder.  The Agent shall give prompt notice to the
Company and the participating Banks of each rate of interest so determined, and
its determination thereof shall be conclusive in the absence of manifest error.
Upon request of the Company, the





                                      -26-
<PAGE>   32
Agent shall furnish to it such information as to its determinations hereunder
as the Company may reasonably request.

                 (d)      Each Reference Bank agrees to use its best efforts to
furnish quotations to the Agent as contemplated by this Section.  If any
Reference Bank does not furnish a timely quotation, the Agent shall determine
the relevant interest rate on the basis of the quotation or quotations
furnished by the remaining Reference Bank or Banks or, if none of such
quotations is available on a timely basis, the provisions of Section 8.01 shall
apply.

                 (e)      This Section 2.07 and each other provision in any of
the Financing Documents or in any other agreement executed in connection
herewith are specifically made subject to Section 2.16.

                 SECTION 2.08.  Facility Fees.  (a)         The Company shall
pay to the Agent for the account of the Banks ratably a facility fee at the
rate per annum for each calendar quarter determined as provided in Schedule I
based on the Rating Level in effect on the first day of such quarter.  Such
facility fee shall accrue (i) from and including the date of this Agreement to
but excluding the earlier of the Termination Date or the date the Commitments
are otherwise terminated, on the daily average aggregate amount of the
Commitments (whether used or unused) and (ii) from and including the earlier of
the Termination Date or the date the Commitments are otherwise terminated to
but excluding the date the Loans shall be repaid in their entirety, on the
daily average aggregate outstanding principal amount of the Loans.

                 (b)      Payments.  Accrued fees under this Section 2.08 shall
be payable quarterly on each March 31, June 30, September 30 and December 31
and upon the date of termination of the Commitments in their entirety (and, if
later, the date the Loans shall be repaid in their entirety).

                 SECTION 2.09.  Optional Termination or Reduction of
Commitments.  The Company may, upon at least three Domestic Business Days'
notice to the Agent, (i) terminate the Commitments at any time, if no Loans are
outstanding at such time, or (ii) ratably reduce from time to time by an
aggregate amount of $10,000,000 or any larger multiple of $5,000,000 the
aggregate amount of the Commitments in excess of the aggregate outstanding
principal amount of the Loans.

                 SECTION 2.10.  Mandatory Termination or Reduction of
Commitments.  (a)  The Commitments shall terminate on the Termination Date.

                 (b)      On the fifth Domestic Business Day following any
Asset Sale that results in positive Excess Net Sales Proceeds, (i) the Company
will deliver to each of the Banks a certificate of the chief financial officer,
the chief accounting officer or the





                                      -27-
<PAGE>   33
treasurer of the Company certifying the amount of such Excess Net Sales
Proceeds from such Asset Sale, (ii) the Commitments shall be automatically
reduced ratably by an amount equal to (a) 100% of the amount of such Excess Net
Sales Proceeds minus (b) the amount, if any, by which the Other Credit
Agreement Commitments are reduced pursuant to Section 2.10(d)(ii) of the Other
Credit Agreement as a result of such Excess Net Sales Proceeds from such Asset
Sale, and (iii) the Company shall be obligated to repay such principal amount
(together with accrued interest thereon) of each Bank's outstanding Loans, if
any, as may be necessary so that after such repayment the aggregate outstanding
principal amount of such Bank's Loans does not exceed the amount of such Bank's
Commitment as then reduced.

                 SECTION 2.11.  Optional Prepayments.  (a) The Company may,
upon at least one Domestic Business Day's notice to the Agent, prepay any
Borrowing in whole at any time, or from time to time in part in amounts
aggregating $10,000,000 or any larger multiple of $1,000,000, by paying the
principal amount to be prepaid together with accrued interest thereon to the
date of prepayment; provided that no partial prepayment of a Euro-Dollar
Borrowing shall be made if after giving effect thereto the principal amount of
such Borrowing would be less than $10,000,000.  Each such optional prepayment
shall be applied to prepay ratably the Loans of the several Banks included in
such Borrowing.

                 (b)      Upon receipt of a notice of prepayment pursuant to
this Section, the Agent shall promptly notify each Bank of the contents thereof
and of such Bank's ratable share (if any) of such prepayment and such notice
shall not thereafter be revocable by the Company.

                 SECTION 2.12.  General Provisions as to Payments.  (a) The
Company shall make each payment of principal of, and interest on, the Loans and
of fees hereunder, not later than 12:00 Noon (Houston time) on the date when
due, in Federal or other funds immediately available in Houston, to the Agent
at its address referred to in Section 9.01.  The Agent will promptly distribute
to each Bank its ratable share of each such payment received by the Agent for
the account of the Banks.  Whenever any payment of principal of, or interest
on, the Base Rate Loans or of fees shall be due on a day which is not a
Domestic Business Day, the date for payment thereof shall be extended to the
next succeeding Domestic Business Day.  Whenever any payment of principal of,
or interest on, the Euro-Dollar Loans shall be due on a day which is not a
Euro-Dollar Business Day, the date for payment thereof shall be extended to the
next succeeding Euro-Dollar Business Day unless such Euro-Dollar Business Day
falls in another calendar month, in which case the date for payment thereof
shall be the next preceding Euro-Dollar Business Day.  If the date for any
payment of principal is extended by operation of law or otherwise, interest
thereon shall be payable for such extended time.





                                      -28-
<PAGE>   34
                 (b)      Unless the Agent shall have received notice from the
Company prior to the date on which any payment is due from the Company to the
Banks hereunder that the Company will not make such payment in full, the Agent
may assume that the Company has made such payment in full to the Agent on such
date and the 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 that the Company shall not have so made
such payment, each Bank shall repay to the Agent forthwith on demand such
amount distributed to such Bank together with interest thereon, for each day
from the date such amount is distributed to such Bank until the date such Bank
repays such amount to the Agent, at the Federal Funds Rate.

                 SECTION 2.13.  Funding Losses.  If the Company makes any
payment of principal with respect to any Euro-Dollar Loan (pursuant to Article
II, VI or VIII or otherwise) on any day other than the last day of an Interest
Period applicable thereto, or the end of an applicable period fixed pursuant to
the proviso to Section 2.07(b), or if the Company fails to borrow any
Euro-Dollar Loan after notice has been given to any Bank in accordance with
Section 2.04(a), or if any Conversion of any Euro-Dollar Loan occurs on any day
other than the last day of an Interest Period applicable thereto, the Company
shall reimburse each Bank within 15 days after demand for any resulting loss or
expense incurred by it (or by an existing or prospective Participant in the
related Loan), including (without limitation) any loss incurred in obtaining,
liquidating or employing deposits from third parties, but excluding loss of
margin from the period after any such payment or failure to borrow; provided
that such Bank shall have delivered to the Company a certificate as to the
amount of such loss or expense, which certificate shall be conclusive in the
absence of manifest error.

                 SECTION 2.14.  Computation of Interest and Fees.  Interest
based on the Base Rate hereunder shall be computed on the basis of a year of
365 days (or 366 days in a leap year) and paid for the actual number of days
elapsed (including the first day but excluding the last day).  All other
interest and fees shall be computed on the basis of a year of 360 days and paid
for the actual number of days elapsed (including the first day but excluding
the last day).

                 SECTION 2.15.  Chapter 15.  In no event shall the provisions
of Article 5069, Chapter 15 of the Revised Civil Statutes of Texas (which
regulates certain revolving credit loan accounts and revolving tri-party
accounts) apply to any Loan made hereunder.

                 SECTION 2.16.  Maximum Interest Rate.  (a) Nothing contained
in this Agreement or the Notes shall require the Company to pay interest at a
rate exceeding the maximum rate permitted without penalty by applicable law.
Each provision in the Financing Documents and any other agreement executed in
connection herewith is expressly limited so that in no event whatsoever shall
the amount paid thereunder, or





                                      -29-
<PAGE>   35
otherwise paid, by the Company for the use, forbearance or detention of the
money to be loaned under this Agreement, exceed that amount of money which
would cause the effective rate of interest thereon to exceed the maximum rate
of interest permitted without penalty under applicable law, and all amounts
payable under the Financing Documents or any other agreement executed in
connection herewith, or otherwise payable in connection therewith, shall be
subject to reduction so that such amounts paid or payable for the use,
forbearance or detention of money to be loaned under this Agreement shall not
exceed that amount of money which would cause the effective rate of interest
thereon to exceed the maximum rate of interest permitted without penalty under
applicable law.

                 (b)      If the amount of interest payable for the account of
any Bank on any interest payment date in respect of the immediately preceding
interest computation period, computed pursuant to Section 2.07, would exceed
the maximum amount permitted without penalty by applicable law to be charged by
such Bank, the amount of interest payable for its account on such interest
payment date shall be automatically reduced to such maximum permissible amount.

                 (c)      If the amount of interest payable for the account of
any Bank in respect of any interest computation period is reduced pursuant to
clause (b) of this Section and the amount of interest payable for its account
in respect of any subsequent interest computation period, computed pursuant to
Section 2.07, would be less than the maximum amount permitted without penalty
by applicable law to be charged by such Bank, then the amount of interest
payable for its account in respect of such subsequent interest computation
period shall be automatically increased to such maximum permissible amount;
provided that at no time shall the aggregate amount by which interest paid for
the account of any Bank has been increased pursuant to this clause (c) exceed
the aggregate amount by which interest paid for its account has theretofore
been reduced pursuant to clause (b) of this Section.

                 (d)      In the event that maturity of the Loans is
accelerated for any reason, or in the event of any required or permitted
prepayment of the Loans, then such consideration that constitutes interest
payable for the account of any Bank shall never include more than the maximum
amount allowed without penalty by applicable law to be charged by such Bank and
excess interest, if any, payable for the account of such Bank pursuant to its
Note, this Agreement or otherwise shall be cancelled automatically as of the
date of such acceleration or prepayment and, if theretofore paid, shall be
credited on the Loans of such Bank (or, to the extent in excess of such Loans,
refunded by such Bank to the Company).

                 (e)      It is further agreed that, without limitation of the
foregoing, all calculations of the rate of interest contracted for, charged or
received for the account of any Bank under the Note held by it, under this
Agreement, under any other





                                      -30-
<PAGE>   36
agreement executed in connection herewith or otherwise in connection with the
Loans or the Commitment of such Bank for the purpose of determining whether
such rate exceeds the maximum nonusurious interest rate applicable to such
Bank, shall be made, to the extent permitted by usury laws applicable to such
Bank (now or hereafter enacted), by amortizing, prorating and spreading in
equal parts during the period of the full stated terms of the Loans evidenced
by such Note all interest at any time contracted for, charged or received by
such Bank in connection therewith.

                 (f)      To the extent that any Bank may be subject to Texas
law limiting the amount of interest payable for its account, such Bank shall
utilize the indicated (weekly) rate ceiling from time to time in effect as
provided in Article 5069-1.04 of the Revised Civil Statutes of Texas, as
amended.

                 SECTION 2.17.  Taxes. (a)  Any and all payments by the Company
hereunder or under the Notes shall be made, in accordance with Section 2.12,
free and clear of and without deduction for any and all present or future
taxes, levies, imposts, deductions, charges and withholdings, and all
liabilities with respect thereto, excluding (i) in the case of the Agent, each
Co-Agent and each Bank, United States federal income taxes and, without
duplication, any taxes imposed on its income, and franchise taxes imposed on
it, by the jurisdiction under the laws of which the Agent, such Co-Agent or
such Bank, as the case may be, is organized or any political subdivision
thereof and (ii) in the case of each Bank, taxes imposed on its income, and
franchise taxes imposed on it, by the jurisdiction of such Bank's Applicable
Lending Office or any political subdivision thereof (all such non-excluded
taxes, levies, imposts, deductions, charges, withholdings and liabilities being
hereinafter referred to as "Taxes").  If the Company shall be required by law
to deduct any Taxes from or in respect of any sum payable hereunder or under
any Note to any Bank, any Co-Agent or the 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
2.17) such Bank, such Co-Agent or the Agent (as the case may be) receives an
amount equal to the sum it would have received had no such deductions been
made, (ii) the Company shall make such deductions and (iii) the Company shall
pay the full amount deducted to the relevant taxation authority or other
authority in accordance with applicable law.

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

         (c)     The Company will indemnify each Bank, each Co-Agent and the
Agent for the full amount of Taxes and Other Taxes (including, without
limitation, any Taxes





                                      -31-
<PAGE>   37
or Other Taxes imposed by any jurisdiction on amounts payable under this
Section 2.17) paid by such Bank, such Co-Agent or the Agent (as the case may
be) and any liability (including penalties, interest and expenses) arising
therefrom or with respect thereto, whether or not such Taxes or Other Taxes
were correctly or legally asserted.  Payments under any indemnification
provided for in this Section 2.17(c) shall be made within 30 days from the date
such Bank, such Co-Agent or the Agent (as the case may be) makes written demand
therefor.

         (d)     Within 30 days after the date of any payment of Taxes, the
Company will furnish to the Agent, at its address referred to in Section 9.01,
the original or a certified copy of a receipt evidencing payment thereof.
Should any Bank, any Co-Agent or the Agent ever receive any refund, credit or
deduction from any taxing authority to which such Bank, such Co-Agent or the
Agent, as the case may be, would not be entitled but for the payment by the
Company of Taxes as required by this Section 2.17 (it being understood that the
decision as to whether or not to claim, and if claimed, as to the amount of any
such refund, credit or deduction shall be made by such Bank, such Co-Agent or
the Agent, as the case may be, in its sole discretion), such Bank, such
Co-Agent or the Agent, as the case may be, thereupon shall repay to the Company
an amount with respect to such refund, credit or deduction equal to any net
reduction in taxes actually obtained by such Bank, such Co-Agent or the Agent,
as the case may be, and reasonably determined by such Bank, such Co-Agent or
the Agent, as the case may be, to be attributable to such refund, credit or
deduction.

         (e)     Each Bank represents that it is either (i) a corporation,
association or other entity organized under the laws of the United States or
any state thereof or (ii) entitled to complete exemption from United States
withholding tax imposed on or with respect to any payments, including fees, to
be made to it pursuant to this Agreement or the Notes.  Each Bank that is not
organized under the laws of the United States or any state thereof (a "Foreign
Bank") agrees to provide to the Company and the Agent, on or prior to the date
of this Agreement in the case of each Foreign Bank signatory hereto, and on the
date of the Assignment pursuant to which it became a Bank in the case of each
other Foreign Bank, two duly completed copies of United States Internal Revenue
Service Form 1001 or 4224, certifying in either case that such Foreign Bank is
entitled to receive payments from the Company under this Agreement and the
Notes without deduction or withholding of any United States federal income
taxes.  Each Foreign Bank which so delivers a Form 1001 or 4224 further
undertakes to deliver to each of the Company and the Agent two additional
copies of such form (or a successor form) on or before the date that such form
expires or becomes obsolete or after the occurrence of any event requiring a
change in the most recent form so delivered by it, and such amendments thereto
or extensions or renewals thereof as may be reasonably requested by the Company
or the Agent, in each case certifying that such Foreign Bank is entitled to
receive payments from the Company under this Agreement and the Notes without
deduction or withholding of any United States federal income





                                      -32-
<PAGE>   38
taxes, unless an event (including without limitation any change in treaty, law
or regulation) has occurred prior to the date on which any such delivery would
otherwise be required which renders all such forms inapplicable or which would
prevent such Foreign Bank from duly completing and delivering any such form
with respect to it and such Foreign Bank advises the Company and the Agent that
it is not capable of receiving such payments without any deduction or
withholding of United States federal income tax.  Each Bank agrees to indemnify
and hold the Company and the Agent harmless from any United States taxes,
penalties, interest and other expenses, costs and losses incurred or payable by
them as a result of either (a) such Bank's failure to submit any form that it
is required to provide pursuant to this Section 2.17(e) or (b) the Agent's and
the Company's reliance on any such form which such Bank has provided to them,
or on the representation of such Bank made to them pursuant to this Section
2.17(e).

         (f)     If any Taxes are paid by the Company pursuant to this Section
2.17 in respect of the Applicable Lending Office of any Bank, such Bank will,
if requested to do so by the Company, designate a different Applicable Lending
Office if such designation will avoid the need to pay, or reduce the amount of,
such Taxes and will not, in the judgment of such Bank, be otherwise
disadvantageous to such Bank.


                                  ARTICLE III

                                   CONDITIONS

                 SECTION 3.01.  Initial Borrowing.  The obligation of any Bank
to make a Loan on the occasion of the initial Borrowing is subject to the
satisfaction (or waiver in accordance with Section 9.05) of each of the
following conditions:

                 (a)      receipt by the Agent of counterparts hereof signed by
         each of the parties hereto (or, in the case of any party as to which
         an executed counterpart shall not have been received, receipt by the
         Agent in form satisfactory to it of telegraphic, telex or other
         written confirmation from such party of execution of a counterpart
         hereof by such party);

                 (b)      receipt by the Agent for the account of each Bank of
         a duly executed Note of the Company dated on the date of this
         Agreement complying with the provisions of Section 2.05;

                 (c)      receipt by the Agent of an opinion of Newton W.
         Wilson, III, General Counsel of the Company, substantially in the form
         of Exhibit C hereto;





                                      -33-
<PAGE>   39
                 (d)      receipt by the Agent of an opinion of Andrews & Kurth
         L.L.P., special counsel for the Company, substantially in the form of
         Exhibit D hereto;

                 (e)      receipt by the Agent of an opinion of Bracewell &
         Patterson, L.L.P., special counsel for the Agent, substantially in the
         form of Exhibit E hereto;

                 (f)      receipt by the Agent of all documents it may
         reasonably request relating to the existence of the Company, the
         corporate authority for and the validity of each of the Financing
         Documents, and any other matters relevant thereto, all in form and
         substance satisfactory to the Agent;

                 (g)      receipt by the Agent of a certificate of an officer
         of the Company stating the rating by S&P and Moody's of all senior
         unsecured long-term debt of the Company as in effect on the date of
         this Agreement; and

                 (h)      receipt by the Agent of a certificate of the chief
         financial officer, the chief accounting officer or the treasurer of
         the Company certifying, as of the Effective Date, that no Default
         exists.

                 SECTION 3.02.  All Borrowings.  The obligation of any Bank to
make a Loan on the occasion of any Borrowing is subject to the satisfaction of
the following conditions (in addition to the conditions set forth in Section
3.01):

                 (a)      receipt by the Agent of a Notice of Borrowing as
         required by Section 2.02;

                 (b)      the fact that immediately prior to and immediately
         after such Borrowing, no Default shall have occurred and be
         continuing; and

                 (c)      the fact that the representations and warranties of
         the Company contained in this Agreement (except, in the case of any
         Borrowing subsequent to the first Borrowing, the representations and
         warranties set forth in Section 4.04(a) or (c)) shall be true and
         correct in all material respects on and as of the date of such
         Borrowing.

Each Borrowing hereunder shall be deemed to be a representation and warranty by
the Company on the date of such Borrowing as to the facts specified in this
Section.





                                      -34-
<PAGE>   40
                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES

                 The Company represents and warrants that:

                 SECTION 4.01.  Corporate Existence and Power.  The Company is
a corporation duly incorporated, validly existing and in good standing under
the laws of its jurisdiction of incorporation, and has all corporate powers and
all material governmental licenses, authorizations, consents and approvals
required to own its assets and to carry on its business as now conducted and is
duly qualified as a foreign corporation in good standing in each jurisdiction
where the nature of its business or the ownership or leasing of its properties
requires such qualification and where the failure so to qualify could have a
material adverse effect on the business, financial position, results of
operations or prospects of the Company and its Subsidiaries, taken as a whole.
Neither the Company nor any Subsidiary or Affiliate is subject to regulation
under the Public Utility Holding Company Act of 1935, the Investment Company
Act of 1940, the Interstate Commerce Act or any other law or regulation which
limits the incurrence by the Company or any Subsidiary of Debt, including, but
not limited to, laws relating to common or contract carriers or the sale of
electricity, gas, steam, water or other public utility services.

                 SECTION 4.02.  Corporate and Governmental Authorization;
Contravention.  The execution, delivery and performance by the Company of each
Financing Document to which it is shown as being a party are within the
Company's corporate powers, have been duly authorized by all necessary
corporate action, and do not contravene, or constitute a default under, any
provision of applicable law or regulation (including, without limitation,
Regulations G, T, U and X of the Board of Governors of the Federal Reserve
System) or the certificate of incorporation, by-laws or other charter documents
of the Company or of any instrument or agreement evidencing or governing Debt
or any other material agreement, judgment, injunction, order, decree or other
instrument binding upon the Company or result in the creation or imposition of
any material Lien on any asset of the Company or any Subsidiary.  All
authorizations, consents and approvals of governmental bodies, agencies or
officials required in connection with the execution, delivery and performance
by the Company of the Financing Documents to which it is shown as being a party
have been obtained and are in full force and effect.

                 SECTION 4.03.  Binding Effect.  This Agreement and each of the
Notes have been duly executed and delivered by the Company and constitute
legal, valid and binding agreements of the Company.





                                      -35-
<PAGE>   41
                 SECTION 4.04.  Information.

                 (a)      The consolidated balance sheet of the Company and its
Consolidated Subsidiaries as of December 31, 1995 and the related consolidated
statements of operations, cash flows and common stock and other shareholders'
equity for the fiscal year then ended, reported on by Price Waterhouse LLP and
set forth in the Company's 1995 Form 10-K, a copy of which has been delivered
to each of the Banks, fairly present, in conformity with generally accepted
accounting principles, the consolidated financial position of the Company and
its Consolidated Subsidiaries as of such date and their consolidated results of
operations and cash flows for such fiscal year.

                 (b)      To the best knowledge of the Company, there are no
statements or conclusions in any Engineering Report delivered pursuant hereto
which are based upon or include misleading information or fail to take into
account material information regarding the matters reported therein, it being
understood that such statements and conclusions are necessarily based upon
professional opinions, estimates and forecasts, and the Company does not
warrant that such opinions, estimates and forecasts will ultimately prove to
have been accurate.

                 (c)      The Company's 1995 Form 10-K does not contain any
untrue statement of material fact or omit to state a material fact necessary in
order to make the statements contained therein not misleading as of the date
thereof.  Except for matters of general public knowledge with respect to the
oil and gas industry, the Company has disclosed to the Banks in writing any and
all facts which materially and adversely affect or may be reasonably expected
so to affect (to the extent the Company can now reasonably foresee) the
business, assets, operations, prospects or condition, financial or otherwise,
of the Company and its Subsidiaries or the ability of the Company to perform
its obligations under the Financing Documents.

                 (d)      Since December 31, 1995 there has been no material
adverse change in the business, financial position, results of operations or
prospects of the Company and its Subsidiaries, taken as a whole.

                 (e)      No Default exists.

                 SECTION 4.05.  Litigation.  There is no action, suit or
proceeding pending against, or to the knowledge of the Company threatened
against or affecting, the Company or any of its Subsidiaries or any of their
respective properties or interests at law or in admiralty or equity, before any
court or arbitrator or any governmental body, agency or official, foreign or
domestic, in which there is a reasonable possibility of an adverse decision
which could materially adversely affect the business, financial





                                      -36-
<PAGE>   42
position or results of operations of the Company and its Subsidiaries, taken as
a whole, or which in any manner draws into question the validity of any
Financing Document.

                 SECTION 4.06.  Compliance with ERISA.  Each member of the
ERISA Group has fulfilled its obligations under the minimum funding standards
of ERISA and the Internal Revenue Code with respect to each Plan and is in
compliance in all material respects with the presently applicable provisions of
ERISA and the Internal Revenue Code with respect to each Plan.  No member of
the ERISA Group has (i) sought a waiver of the minimum funding standard under
Section 412 of the Internal Revenue Code in respect of any Plan, (ii) failed to
make any contribution or payment to any Plan or Multiemployer Plan or in
respect of any Benefit Arrangement, or made any amendment to any Plan or
Benefit Arrangement, which has resulted or could result in the imposition of a
Lien or the posting of a bond or other security under ERISA or the Internal
Revenue Code or (iii) incurred any liability under Title IV of ERISA other than
a liability to the PBGC for premiums under Section 4007 of ERISA.

                 SECTION 4.07.  Environmental Matters.  In the ordinary course
of its business, the Company conducts an ongoing review of the effect of
existing Environmental Laws on the business, operations and properties of the
Company and the Subsidiaries, in the course of which it attempts to identify
and evaluate 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, the Company has reasonably concluded
that existing Environmental Laws are unlikely to have a material adverse effect
on the business, financial condition, results of operations or prospects of the
Company and its Subsidiaries, taken as a whole.

                 SECTION 4.08.  Subsidiaries.  All Restricted Assets are owned
as of the date of this Agreement by the Company and the Persons listed in Part
B of Schedule II hereto or, in the case of Restricted Assets sold since
December 31, 1993, by Persons other than Unrestricted Subsidiaries.  Part A of
Schedule II hereto contains a true, complete and accurate list of all
Unrestricted Subsidiaries, and Part B of Schedule II hereto contains a true,
complete and accurate list of all Restricted Subsidiaries as of the date of
this Agreement.

                 SECTION 4.09.  Ownership of Restricted Subsidiaries. The
Company or a Restricted Subsidiary is the record and beneficial owner, free and
clear of all Liens (other than those permitted by Section 5.07), of (i) all of
the issued and outstanding





                                      -37-
<PAGE>   43
capital stock (other than directors' qualifying shares and shares beneficially
owned by the Company or a Restricted Subsidiary and held by nominees of the
Company or a Restricted Subsidiary solely to satisfy requirements of local law)
and other ownership interests of each Restricted Subsidiary (except Unimar and
the Unimar Restricted Subsidiaries and any other Restricted Subsidiary the
capital stock of which is sold pursuant to a sale permitted by Section 5.14)
and (ii) except during any period during which Unimar is an Unrestricted
Subsidiary or ceases to be a Subsidiary, at least 50% of the ownership interest
in Unimar and the Unimar Restricted Subsidiaries.  Except as disclosed on
Schedule VI, there are no outstanding options, warrants or other rights to
acquire any capital stock or other ownership interest of any Restricted
Subsidiary.

                 SECTION 4.10.  Title to Properties.  The Company and each of
the Subsidiaries have good title, free and clear of all Liens, claims, burdens
and title defects, to all of the material assets reflected in the Company's or
such Subsidiary's books and records as being owned by them except Liens
permitted by this Agreement and claims, burdens and title defects not
materially adverse in the aggregate.

                 SECTION 4.11.  Taxes and Other Obligations.  Consolidated
United States Federal income tax returns of the Company and the Subsidiaries
have been examined by the Internal Revenue Service, or the statutory period for
such examination has expired, for all years up to and including the year ended
December 31, 1989, and all assessed deficiencies resulting from such
examination have been discharged or reserved against as required by generally
accepted accounting principles.  The Company and the Subsidiaries have filed
all United States Federal, state and local income tax returns and all other
material domestic tax returns which are required to be filed by them and have
paid, or provided for the payment before the same became delinquent of, all
taxes due pursuant to such returns or pursuant to any assessment received by
the Company or any Subsidiary, other than those taxes being diligently
contested in good faith by appropriate proceedings.  The charges, accruals and
reserves on the books of the Company and the Subsidiaries in respect of taxes
are, in the opinion of the Company, adequate.  The Company and the Subsidiaries
have set up such reserves as are required by generally accepted accounting
principles for the payment of additional taxes for years which have not been
audited by the respective tax authorities.  The Company and the Subsidiaries
have paid all other material obligations when due other than those being
contested in good faith by appropriate proceedings.

                 SECTION 4.12.  Regulation U.  Neither the Company  nor any
Subsidiary is engaged in the business of extending credit for the purpose of
purchasing or carrying margin stock (within the meaning of Regulation G) or
margin stock (within the meaning of Regulation U).  Following the application
of the proceeds of each Loan, not more than 25% of the value of the assets of
the Company, or of the Company and its Subsidiaries, which are subject to any
arrangement with the Agent or any Bank (herein or otherwise) whereby the
Company's or any Subsidiary's right or ability to





                                      -38-
<PAGE>   44
sell, pledge or otherwise dispose of assets is in any way restricted will be
any such margin stock.

                 SECTION 4.13.  Certain Obligations.  Neither the Company nor
any Subsidiary has any obligation to make payments on the Joint Venture Debt
other than those permitted by Section 5.17.  The only Non-Recourse Debt
existing on the date of this Agreement is the Existing Pakistan Non-Recourse
Debt.

                 SECTION 4.14.  United Kingdom Assets.  Substantially all of
the Restricted Assets located in the United Kingdom (including the United
Kingdom Sector of the North Sea) are directly owned by UTPL as of the date of
this Agreement.


                                   ARTICLE V

                                   COVENANTS

                 The Company agrees that, so long as any Bank has any
Commitment hereunder or any amount payable under any Note remains unpaid:

                 SECTION 5.01.  Information.  The Company will deliver to each
of the Banks:

                 (a)      as soon as available and in any event within 100 days
         after the end of each fiscal year of the Company, a consolidated
         balance sheet of the Company and its Consolidated Subsidiaries as of
         the end of such fiscal year and the related consolidated statements of
         operations, cash flows and common stock and other shareholders' equity
         for such fiscal year, setting forth in each case in comparative form
         the figures for the previous fiscal year, all reported on in a manner
         acceptable to the Securities and Exchange Commission by Price
         Waterhouse LLP or other independent public accountants of nationally
         recognized standing;

                 (b)      as soon as available and in any event within 60 days
         after the end of each of the first three quarters of each fiscal year
         of the Company, a consolidated balance sheet of the Company and its
         Consolidated Subsidiaries as of the end of such quarter and the
         related consolidated statements of operations and cash flows for such
         quarter and for the portion of the Company's fiscal year ended at the
         end of such quarter, setting forth in each case in comparative form
         the figures for the corresponding quarter and the corresponding
         portion of the Company's previous fiscal year, all certified (subject
         to normal year-end adjustments) as to preparation in accordance with
         generally accepted accounting





                                      -39-
<PAGE>   45
         principles and consistency by the chief financial officer, the chief
         accounting officer or the treasurer of the Company;

                 (c)      simultaneously with the delivery of each set of
         financial statements referred to in clauses (a) and (b) above, a
         certificate of the chief financial officer, the chief accounting
         officer or the treasurer of the Company (i) setting forth in
         reasonable detail the calculations required to establish whether the
         Company was in compliance with the requirements of Sections 5.05 and
         5.15 on the date of such financial statements and (ii) stating whether
         any Default exists on the date of such certificate and, if any Default
         then exists, setting forth the details thereof and the action which
         the Company and its Subsidiaries are taking or propose to take with
         respect thereto;

                 (d)      as soon as available and in any event within 60 days
         after the end of each fiscal quarter of the Company, a certificate of
         the chief financial officer, the chief accounting officer or the
         treasurer of the Company certifying (i) the rating (or lack of a
         rating thereof) by each of S&P and Moody's of the senior unsecured
         long-term debt of the Company on the date of such certificate, (ii)
         the Unimar Percentage as of the end of such quarter and the amounts as
         of the end of such quarter of Consolidated Debt, Defeased Debt,
         Excluded Subordinated Debt, Debt of the Company and its Consolidated
         Subsidiaries determined on a consolidated basis, Debt of the Company
         and the Restricted Subsidiaries determined on a consolidated basis,
         Debt of Unimar, Debt of Unrestricted Subsidiaries, Excess Letter of
         Credit/Guarantee Amount, Non-Restricted Asset Non-Recourse Debt,
         Non-Recourse Debt of the Company and the Restricted Subsidiaries, and
         Restricted Subsidiaries Recourse Debt, and (iii) each Asset Sale that
         has been consummated during such quarter, the Fair Market Value of the
         Restricted Assets subject thereto, the amount of fees, commissions,
         expenses and taxes related thereto, the Net Sales Proceeds therefrom
         and the cumulative amount of the Excess Net Sales Proceeds from all
         Assets Sales since December 31, 1993;

                 (e)      within five days after the chief financial officer,
         the chief accounting officer or treasurer of the Company obtains
         knowledge of any Default, if such Default is then continuing, a
         certificate of the chief financial officer, the chief accounting
         officer or the treasurer of the Company setting forth the details
         thereof and the action which the Company and its Subsidiaries are
         taking or propose to take with respect thereto;

                 (f)      immediately upon the filing of, or any material
         development in, any litigation or the occurrence of any other event or
         contingency, if such development, litigation, event or contingency
         could reasonably be expected to have a material adverse effect on the
         business, assets, operations, prospects or





                                      -40-
<PAGE>   46
         condition, financial or otherwise, of the Company and its
         Subsidiaries, taken as a whole, a certificate of the chief financial
         officer, the chief accounting officer or the treasurer of the Company
         setting forth the details of such development, litigation, event or
         contingency and the action which the Company and its Subsidiaries are
         taking or propose to take with respect thereto;

                 (g)      as soon as available and in any event within 100 days
         after the end of each fiscal year of each Restricted Subsidiary (other
         than the Unimar Restricted Subsidiaries), a consolidated balance sheet
         of such Restricted Subsidiary and its consolidated subsidiaries as of
         the end of such fiscal year and the related consolidated statements of
         operations, cash flows and common stock and other shareholders' equity
         for such fiscal year, setting forth in each case in comparative form
         the figures for the previous fiscal year, all certified as to
         preparation in accordance with generally accepted accounting
         principles and consistency by the chief financial officer, the chief
         accounting officer or the treasurer of such Restricted Subsidiary;

                 (h)      as soon as available and in any event within 60 days
         after the end of the first three quarters of each fiscal year of each
         Restricted Subsidiary (other than the Unimar Restricted Subsidiaries,
         Union Texas Petroleum Energy Corporation and Union Texas International
         Corporation), a consolidated balance sheet of such Restricted
         Subsidiary and its consolidated subsidiaries as of the end of such
         quarter and the related consolidated statements of operations and cash
         flows for such quarter and for the portion of such Restricted
         Subsidiary's fiscal year ended at the end of such quarter, setting
         forth in each case in comparative form the figures for the
         corresponding quarter and the corresponding portion of such Restricted
         Subsidiary's previous fiscal year, all certified (subject to normal
         year-end adjustments) as to preparation in accordance with generally
         accepted accounting principles and consistency by the chief financial
         officer, the chief accounting officer or the treasurer of such
         Restricted Subsidiary;

                 (i)      promptly upon the mailing thereof to the shareholders
         of the Company generally, copies of all financial statements, reports
         and proxy statements so mailed;

                 (j)      promptly upon the filing thereof, copies of all
         registration statements (other than the exhibits thereto and any
         registration statements on Form S-8 or its equivalent) and reports on
         Forms 10-K, 10-Q and 8-K (or their equivalents) which the Company
         shall have filed with the Securities and Exchange Commission;





                                      -41-
<PAGE>   47
                 (k)      at least 45 days prior to the closing of each Asset
         Sale that will result in aggregate Net Sales Proceeds (for such sale
         or, if such sale is one of a series of related sales, for all sales
         and contemplated sales in such series) of $50,000,000 or more, notice
         of such sale describing the assets to be sold and the estimated Net
         Sales Proceeds thereof;

                 (l)      if and when any member of the ERISA Group (i) gives
         or is required to give notice to the PBGC of any "reportable event"
         (as defined in Section 4043 of ERISA) (other than a "reportable event"
         not subject to the provisions for 30-day notice to the PBGC under the
         regulations issued under Section 4043 of ERISA) with respect to any
         Plan which might constitute grounds for a termination of such Plan
         under Title IV of ERISA, or knows that the plan administrator of any
         Plan has given or is required to give notice of any such reportable
         event, a copy of the notice of such reportable event given or required
         to be given to the PBGC; (ii) receives notice of complete or partial
         withdrawal liability under Title IV of ERISA or notice that any
         Multiemployer Plan is in reorganization, is insolvent or has been
         terminated, a copy of such notice; (iii) receives notice from the PBGC
         under Title IV of ERISA of an intent to terminate, impose liability
         (other than for premiums under Section 4007 of ERISA) in respect of,
         or appoint a trustee to administer, any Plan, a copy of such notice;
         (iv) applies for a waiver of the minimum funding standard under
         Section 412 of the Internal Revenue Code, a copy of such application;
         (v) gives notice of intent to terminate any Plan under Section 4041(c)
         of ERISA, a copy of such notice and other information filed with the
         PBGC; (vi) gives notice of withdrawal from any Plan pursuant to
         Section 4063 of ERISA, a copy of such notice; or (vii) fails to make
         any payment or contribution to any Plan or Multiemployer Plan or in
         respect of any Benefit Arrangement which has resulted or could result
         in the imposition of a Lien or the posting of a bond or other
         security, a certificate of the chief financial officer, the chief
         accounting officer or the treasurer of the Company setting forth
         details as to such occurrence and action, if any, which the Company or
         applicable member of the ERISA Group is required or proposes to take;

                 (m)      within 5 days after the chief financial officer, the
         treasurer or the controller of the Company has knowledge of any filing
         under Rule 13d of the Securities and Exchange Commission, promulgated
         under the Securities Exchange Act of 1934, as amended, a copy thereof;

                 (n)      within 5 days after receipt by the Company of any
         written agreement of the type referred to in Section 6.01(k)(iii)(c),
         (A) a copy thereof except that (i) if such written agreement has not
         been filed with the Securities and Exchange Commission and is not
         otherwise public information, each Bank as a condition to receiving a
         copy of such written agreement may be required





                                      -42-
<PAGE>   48
         to sign, prior to receipt thereof, a confidentiality agreement
         pursuant to which it agrees that it will treat such written agreement
         in a confidential manner until such written agreement otherwise
         becomes public, except for disclosure (a) to counsel for and other
         advisors, accountants and auditors of such Bank, (b) as may be
         required by statute, decision, order, rule, regulation or other law,
         (c) to regulatory authorities, (d) in connection with any litigation
         involving such written agreement, such confidentiality agreement or
         any of the Financing Documents, and (e) in connection with any
         assignment, prospective assignment, sale, prospective sale,
         participation or prospective participation or other transfer or
         prospective transfer of any of such Bank's interests hereunder;
         provided that any such assignee, prospective assignee, purchaser,
         prospective purchaser, participant, prospective participant,
         transferee, or prospective transferee shall have entered into a
         confidentiality agreement for the benefit of the Company substantially
         upon the terms of this Section 5.01(n), and (ii) if the Company is
         contractually prohibited from delivering a copy of such written
         agreement to the Banks, the Company shall not be required to deliver
         such written agreement unless such prohibition has been waived, but
         the Company shall use reasonable efforts to obtain such waiver or if
         it is a party to such written agreement to prevent any such
         prohibition from being included therein, and (B) if the Company is a
         party to such written agreement, but is excused pursuant to clause
         (A)(ii) of this Section 5.01(n) from delivering a copy thereof to the
         Banks, the Company shall notify the Banks of the existence of such
         written agreement (but not the content thereof or other parties
         thereto), but as a condition to receiving such notice the Banks may be
         required to sign, prior to receipt of such notice, a confidentiality
         agreement conforming to clause (A)(i) of this Section 5.01(n);

                 (o)      by May 1 of each year, an Engineering Report as of
         the last day of the immediately preceding year;

                 (p)      promptly upon the closing of the sale or other
         disposition of any capital stock of UTPC or any option, warrant or
         other right to acquire any such capital stock, notice thereof;

                 (q)      promptly after any change in or termination of the
         rating of any senior unsecured long-term debt of the Company by S&P or
         Moody's, notice thereof.

                 (r)      from time to time such additional information
         regarding the financial position or business of the Company or any
         Subsidiary as the Agent, at the request of any Bank, may reasonably
         request.

                 SECTION 5.02.  Affirmative Covenants.  The Company will
maintain its existence and cause each Restricted Subsidiary to maintain its
existence except in





                                      -43-
<PAGE>   49
the case of (i) a merger of a Restricted Subsidiary into the Company in a
merger permitted by Section 5.08 hereof, (ii) the merger of a Restricted
Subsidiary into another Restricted Subsidiary, if immediately after such merger
(and giving effect thereto), no Default shall have occurred and be continuing,
and (iii) any Asset Sale in the form of the merger of a Restricted Subsidiary
into another Person, if immediately after such merger (and giving effect
thereto), no Event of Default shall have occurred and be continuing.  The
Company and each Subsidiary shall:

                 (a)      Conduct of Business; Property.  Cause all material
         property useful and necessary in its business to be maintained in good
         working order and condition and to be operated prudently in accordance
         with good industry practice; and to the extent consistent with prudent
         business practices, defend its right, title and interest in its
         material properties against all adverse claims.

                 (b)      Compliance with Laws.  Comply with all applicable
         laws, ordinances, rules, regulations and reporting, filing and other
         requirements of governmental authorities (including, without
         limitation, Environmental Laws and ERISA and the rules and regulations
         thereunder), except where the necessity of compliance therewith is
         contested in good faith by appropriate proceedings or where the
         failure to so comply would not have a material adverse effect on the
         Company and its Subsidiaries, taken as a whole.

                 (c)      Inspection of Property, Books and Records.  Keep
         proper books of record and account in accordance with sound accounting
         practices; and permit representatives of any Bank, at such Bank's sole
         risk and expense, to visit and inspect any of its properties (subject
         to obtaining any required consent of third-party operators), to
         examine and make abstracts and copies from any of its books and
         records and to discuss its affairs, finances and accounts with its
         officers and employees, and use its best efforts to make its
         independent public accountants available to discuss the affairs,
         finances and accounts of the Company and any of its Subsidiaries, all
         at such reasonable times and as often as may reasonably be desired.

                 SECTION 5.03.  Primary Business.  The exploration for, and
production and marketing of, Hydrocarbons will continue to be the primary
business of the Company and its Subsidiaries taken as whole.

                 SECTION 5.04.  Insurance.  The Company will maintain, and will
cause each Subsidiary to maintain (either in the name of the Company or in such
Subsidiary's own name) with financially sound and reputable insurance
companies, insurance on





                                      -44-
<PAGE>   50
their property in at least such amounts and against at least such risks as are
usually insured against in the same general area by companies of established
repute engaged in the same or similar business; and will furnish to the Banks,
upon written request from the Agent, full information as to the insurance
carried.

                 SECTION 5.05.  Debt.  (a)  At no time will Restricted 
Subsidiaries Recourse Debt exceed $75,000,000.

         (b)     Consolidated Debt will not, on the last day of any calendar
quarter, exceed 3.75 times Operating Cash Flow for the four calendar quarters
ending on such day.

         (c)     Neither the Company nor any Restricted Subsidiary will create,
assume or otherwise incur any Debt if at the time of creation, assumption or
incurrence of such Debt or after giving effect to the creation, assumption or
incurrence of such Debt, any Event of Default would exist; provided that the
Company or any Restricted Subsidiary may renew or extend (but not increase) its
own Debt.

                 SECTION 5.06.  Restricted Payments.  Neither the Company nor
any Subsidiary shall declare or make any Restricted Payment unless, immediately
prior thereto and immediately thereafter, no Event of Default shall have
occurred and be continuing.  Neither the Company nor any Subsidiary shall make
any Restricted Transfer unless, immediately prior thereto and immediately
thereafter, no Event of Default shall have occurred and be continuing; provided
that the Company or any Subsidiary can make Restricted Transfers in the form of
Investments in an Affiliate, Unrestricted Subsidiary or subsidiary of an
Unrestricted Subsidiary if (i) such Affiliate, Unrestricted Subsidiary or
subsidiary, as the case may be, has no outstanding Debt at the time of such
Investment and does not thereafter create, assume or otherwise incur any Debt
while any Event of Default is continuing and (ii) the Company notifies the
Banks of any such Investment in excess of $5,000,000 at least ten days prior to
such Investment.  Nothing in this Section shall prohibit the payment of any
dividend or distribution within 45 days after the declaration thereof if
payment of such dividend or distribution was not prohibited by this Agreement
at the time such declaration was made.

                 SECTION 5.07.  Negative Pledge.  Neither the Company nor any
Restricted Subsidiary will create, assume or suffer to exist (i) any Lien on
any capital stock or other ownership interest of any Restricted Subsidiary now
owned or hereafter acquired by it or any Lien on any option, warrant or other
right to acquire any capital stock or other ownership interest of any
Restricted Subsidiary now owned or hereafter acquired by it, other than those
described in Part A of Schedule III or (ii) any Lien on any other asset now
owned or hereafter acquired by it, except for the following Liens on assets not
referred to in the foregoing clause (i) of this Section:





                                      -45-
<PAGE>   51
                 (a)      Liens existing on the date of this Agreement,
         securing Debt outstanding and other obligations (including contractual
         obligations) existing on the date of this Agreement and, except in the
         case of inchoate operator's Liens, described in Part B of Schedule III
         hereto;

                 (b)      any Lien (i) on any Non-Restricted Asset securing
         only Non-Restricted Asset Non-Recourse Debt of the Company or any
         Restricted Subsidiary or (ii) on any asset of Virginia Indonesia
         Company, Virginia International Company or Union Texas East Kalimantan
         Limited securing Joint Venture Debt;

                 (c)      mechanics', materialmen's, carriers' and other
         statutory Liens, but only if arising, and only so long as continuing,
         in the ordinary course of business; or deposits or pledges to obtain
         the release of any such Lien; or easements, encroachments or other
         title defects which do not materially detract from the value of its
         assets or materially impair the use thereof in the operation of its
         business;

                 (d)      Liens arising in the ordinary course of its business
         which (i) do not secure Debt, (ii) do not secure any obligation in an
         amount exceeding $15,000,000 and (iii) do not in the aggregate
         materially detract from the value of its assets or materially impair
         the use thereof in the operation of its business;

                 (e)      Liens on any interest in a Partnership arising under
         any agreement creating or governing such Partnership (including
         Unimar) and securing only obligations of the members of such
         Partnership to make Investments in such Partnership;

                 (f)      Liens arising under any customary provision of any
         joint operating agreement or similar agreement relating to the
         exploration, production, development or transportation of oil and gas;

                 (g)      Liens not otherwise permitted by the foregoing
         clauses of this Section on assets (other than any of the Restricted
         Assets) securing Debt in an aggregate principal amount at any time
         outstanding not to exceed $20,000,000;

                 (h)      any Lien securing the refinancing, extension, renewal
         or refunding of any Debt secured by any Lien permitted by the
         foregoing subsection (a) of this Section; provided that such Debt is
         not increased from the lesser of the amount of such Debt set forth on
         Schedule III hereto or the amount of such Debt outstanding immediately
         prior to such refinancing, extension, renewal or refunding, and such
         Lien does not cover any property that is not described on Schedule III
         hereto as securing such Debt; and





                                      -46-
<PAGE>   52
                 (i)      Liens in favor of third parties on cash, treasury
         securities and other property deposited in margin accounts relating
         to, or otherwise delivered as collateral for any obligation of the
         Company or any Subsidiary under, contracts of the Company or any
         Subsidiary evidencing any Derivative Transaction or other hedge
         obligation; provided, that the aggregate Fair Market Value of all such
         cash, treasury securities and other property subject to such Liens
         shall not exceed from time to time $15,000,000.

                 SECTION 5.08.  Consolidations and Mergers.  The Company will
not consolidate or merge with or into any Person; provided that the Company may
merge with another Person if the Company is the surviving corporation and,
immediately after such merger (and giving effect thereto), no Default shall
have occurred and be continuing.

                 SECTION 5.09.  Use of Proceeds.  The proceeds of the Loans
made under this Agreement will be used by the Company for general corporate
purposes; provided that none of such proceeds will be used in any manner or for
any purpose that results in any violation of any applicable law or regulation
(including, without limitation, Regulations G, T, U and X of the Board of
Governors of the Federal Reserve System).

                 SECTION 5.10.  Addition of Guarantors.  If any Subsidiary of
the Company Guarantees (i) Debt (other than Funded Debt) of the Company having
an aggregate outstanding balance less than $25,000,000, and any Guarantee of
such Debt has not been released or terminated within 60 days of the date of the
incurrence of such obligation or (ii) Debt (other than Debt described in clause
(i) above) of the Company, then the Company shall (a) cause all Loans and all
other amounts payable at any time under any of the Financing Documents,
including, without limitation, interest which accrues during a proceeding which
occurs under the U.S. Bankruptcy Code or which would otherwise accrue under the
terms of any of the Financing Documents, but for a proceeding under the U.S.
Bankruptcy Code, to be equally and ratably guaranteed by such Subsidiary, (b)
cause such Subsidiary to execute and deliver a subsidiary guaranty agreement in
form and substance satisfactory to the Banks, and (c) deliver an opinion of
counsel and officers' certificate to the effect that such subsidiary guaranty
agreement has been duly authorized and executed by such Subsidiary and
constitutes the legal, valid, binding and enforceable obligation of such
Subsidiary, all in form and substance satisfactory to the Banks.  "Funded Debt"
of any Person means at any date, all Debt (including, without limitation, Debt
incurred under any revolving credit, letter of credit or working capital
facility) of such Person that matures by its terms, or that is renewable at the
option of such Person to a date more than one year after the date on which such
Debt is originally incurred.





                                      -47-
<PAGE>   53
                 SECTION 5.11.  Restrictions on Dividends, Intercompany Loans,
or Investments.  The Company will not create or otherwise cause or permit to
exist or become effective, or permit any Subsidiary to create or otherwise
cause or permit to exist or become effective, any consensual encumbrance or
restriction (other than the Financing Documents) on the ability of any
Restricted Subsidiary to (i) pay dividends or make any other distributions on
its capital stock or other ownership interests or pay any Debt or other
obligation owed to the Company or any Restricted Subsidiary, or (ii) make any
loans or advances to or other Investments in the Company or any Restricted
Subsidiary, except any encumbrance or restriction in effect on the date of this
Agreement and described on Schedule IV hereto.

                 SECTION 5.12.  Loans and Advances.  The Company will not make
or permit to remain outstanding any cash loan or advance to any Person, or
permit any Restricted Subsidiary to make or permit to remain outstanding any
cash loan or advance to any Person, except (i) loans and advances to
Subsidiaries or joint ventures, partnerships or other business ventures in
which the Company or any Subsidiary has or is contemporaneously acquiring an
interest or participation; and (ii) other loans and advances not exceeding
$10,000,000 at any time outstanding.

                 SECTION 5.13.  Cross-Default.  The Company will not create,
assume, otherwise incur or suffer to exist, or permit any Restricted Subsidiary
to create, assume, otherwise incur or suffer to exist, any Debt if the maturity
of such Debt is or may be accelerated (assuming the giving of notice or lapse
of time or both), in whole or in part, as a result of any default under, or
acceleration of (i) any Non-Recourse Debt of the Company or any Restricted
Subsidiary or (ii) any Debt of any Unrestricted Subsidiary, unless the Required
Banks shall have given their prior written consent to such Debt of the Company
or Restricted Subsidiary to be so created, assumed or otherwise incurred, which
consent will not be unreasonably withheld; provided that this Section 5.13
shall not prohibit a provision in a Guarantee of the Company or a Restricted
Subsidiary Guaranteeing Debt of an Unrestricted Subsidiary that provides that
the payment obligation under such Guarantee may be accelerated upon default
under or acceleration of such Debt.

                 SECTION 5.14.  Subsidiaries.  The Company will at all times
own, either directly or through one or more Restricted Subsidiaries, free and
clear of all Liens (other than those permitted by Section 5.07), 100% of all
issued and outstanding capital stock (other than directors' qualifying shares
and shares beneficially owned by the Company or a Restricted Subsidiary and
held by nominees of the Company or a Restricted Subsidiary solely to satisfy
requirements of local law) and other ownership interests of each Restricted
Subsidiary and all options, warrants and other rights to acquire any such
capital stock or any such ownership interest, except for (i) Unimar and the
Unimar Restricted Subsidiaries, (ii) any Restricted Subsidiary sold or
otherwise disposed of pursuant to an Asset Sale, if after giving effect to such
Asset Sale, the





                                      -48-
<PAGE>   54
Company does not own, directly or indirectly, any interest in such Restricted
Subsidiary, and (iii) those options described on Schedule VI.  The Company will
at all times own, either directly or through one or more Restricted
Subsidiaries, free and clear of all Liens (other than those permitted by
Section 5.07), 50% or more of the ownership interest in Unimar and the Unimar
Restricted Subsidiaries and all options, warrants and other rights to acquire
any such ownership interest (other than those described on Schedule VI);
provided that the Company and the Restricted Subsidiaries may sell all of their
ownership interest in Unimar and the Unimar Restricted Subsidiaries and such
options, warrants and other rights if, after giving effect to such sale, the
Company does not own, directly or indirectly, any interest in Unimar, the
Unimar Restricted Subsidiaries or any such option, warrant or other right.  The
Company will not at any time permit any Restricted Subsidiary that is not a
Unimar Restricted Subsidiary to become a Unimar Restricted Subsidiary.  The
Company will not permit any Restricted Asset to be sold, leased, transferred or
otherwise disposed of to any Person that was an Unrestricted Subsidiary
immediately prior thereto if any Default then exists or would result.  The
Company will not permit any Restricted Subsidiary to issue any preferred stock
unless such preferred stock at all times is owned only by the Company.  The
Company will not permit any Restricted Subsidiary to own, directly, both (a)
any UK Asset and (b) any Non-UK Asset.

                 SECTION 5.15.  Adjusted Equity and Interest Coverage.  The
Company will at all times maintain Adjusted Equity of $350,000,000 or more.
The Company will cause EBITDA for each period of four consecutive calendar
quarters to exceed 4.00 times Cash Interest Expense for such period.

                 SECTION 5.16.  Excluded Subordinated Debt and Preferred Stock.
Neither the Company nor any Subsidiary will pay, prepay, purchase, redeem,
defease, acquire, exchange or convert any preferred stock (other than
Restricted Preferred Stock) or any Excluded Subordinated Debt, except (a)
exchanges for or conversions to common stock of the Company, (b) payments of
interest when due required by the terms of any such Excluded Subordinated Debt
as such terms are in effect on the date such Excluded Subordinated Debt is
incurred and (c) if no Event of Default exists, payments of ordinary periodic
dividends (excluding liquidating dividends) on such preferred stock in
accordance with the terms thereof as such terms are in effect on the date such
preferred stock is issued.

                 SECTION 5.17.  Certain Obligations.  Neither the Company nor
any Subsidiary will create, incur, assume or suffer to exist any obligation on
its part to make any payment on the Joint Venture Debt other than (a) the
obligations set forth in the agreements listed on Schedule V hereto with
respect to Joint Venture Debt in existence on the date of this Agreement and
(b) obligations substantially similar to those referred to in clause (a) with
respect to Joint Venture Debt created, incurred, assumed or arising after the
date of this Agreement.





                                      -49-
<PAGE>   55
                 SECTION 5.18.  Restrictions on Asset Sales.  (a)  The Company
will not and will not permit any of its Restricted Subsidiaries to enter into
any Asset Sale if after giving effect thereto any Event of Default would exist.

         (b)     The Company will not permit to occur any Asset Sale involving,
directly or indirectly, any UK Assets if the aggregate Net Sales Proceeds of
all Asset Sales involving, directly or indirectly, UK Assets since December 31,
1993 would exceed $250,000,000.

                 SECTION 5.19.  Conversion to Unrestricted Subsidiary.  The
Company may convert a Restricted Subsidiary into an Unrestricted Subsidiary by
giving the Agent notice of such conversion at least 5 Domestic Business Days
prior to such conversion; provided that (i) no Restricted Subsidiary shall be
so converted so long as it owns directly or indirectly any interest in any
Restricted Asset and (ii) no such conversion shall be made if at the time of
such notice or after giving effect to such conversion, any Default would exist.


                                   ARTICLE VI

                                    DEFAULTS

                 SECTION 6.01.  Events of Default.  If one or more of the
following events ("Events of Default") shall have occurred and be continuing:

                 (a)      the Company shall fail to pay when due any principal
         of any Loan, or shall fail to pay within five days of the due date
         thereof any interest on any Loan, any fees or any other amount payable
         hereunder;

                 (b)      the Company or any Subsidiary shall fail to observe
         or perform any covenant contained in Sections 5.05 to 5.18, inclusive;

                 (c)      the Company or any Subsidiary shall fail to observe
         or perform any covenant or agreement contained in this Agreement
         (other than those covered by clause (a) or (b) above) for 30 days
         after written notice thereof has been given to the Company by the
         Agent at the request of any Bank;

                 (d)      any representation, warranty, certification or
         statement made by the Company or any Subsidiary in this Agreement or
         made in any certificate, financial statement or other document
         delivered pursuant to this Agreement shall prove to have been
         incorrect in any material respect when made (or deemed made);





                                      -50-
<PAGE>   56
                 (e)      the Company or any Restricted Subsidiary shall fail
         to make any payment in respect of any Material Debt (other than the
         Notes) when due or within any applicable grace period;

                 (f)      any event or condition shall occur which results in
         the acceleration of the maturity of any Material Debt of the Company
         or any Restricted Subsidiary (other than the Notes) or enables (or,
         with the giving of notice or lapse of time or both, would enable) the
         holder of such Material Debt or any Person acting on such holder's
         behalf to accelerate the maturity thereof;

                 (g)      the Company or any Restricted Subsidiary shall
         commence a voluntary case or other proceeding seeking liquidation,
         reorganization or other relief with respect to itself or its debts
         under any bankruptcy, insolvency or other similar law now or hereafter
         in effect or seeking the appointment of a trustee, receiver,
         liquidator, custodian or other similar official of it or any
         substantial part of its property, or shall consent to any such relief
         or to the appointment of or taking possession by any such official in
         an involuntary case or other proceeding commenced against it, or shall
         make a general assignment for the benefit of creditors, or shall fail
         generally to pay its debts as they become due, or shall take any
         corporate action to authorize any of the foregoing;

                 (h)      an involuntary case or other proceeding shall be
         commenced against the Company or any Restricted Subsidiary seeking
         liquidation, reorganization or other relief with respect to it or its
         debts under any bankruptcy, insolvency or other similar law now or
         hereafter in effect or seeking the appointment of a trustee, receiver,
         liquidator, custodian or other similar official of it or any
         substantial part of its property, and such involuntary case or other
         proceeding shall remain undismissed and unstayed for a period of 60
         days; or an order for relief shall be entered against the Company or
         any Restricted Subsidiary under the federal bankruptcy laws as now or
         hereafter in effect;

                 (i)      any member of the ERISA Group shall fail to pay when
         due an amount or amounts aggregating in excess of $5,000,000 which it
         shall have become liable to pay under Title IV of ERISA; or notice of
         intent to terminate a Material Plan shall be filed under Title IV of
         ERISA by any member of the ERISA Group, any plan administrator or any
         combination of the foregoing; or the PBGC shall institute proceedings
         under Title IV of ERISA to terminate, to impose liability (other than
         for premiums under Section 4007 of ERISA) in respect of, or to cause a
         trustee to be appointed to administer any Material Plan; or a
         condition shall exist by reason of which the PBGC would be entitled to
         obtain a decree adjudicating that any Material Plan must be
         terminated; or there shall occur a complete or partial withdrawal
         from, or a default, within the meaning of Section 4219(c)(5) of ERISA,
         with respect to, one or more





                                      -51-
<PAGE>   57
         Multiemployer Plans which could cause one or more members of the ERISA
         Group to incur a current payment obligation in excess of $5,000,000;

                 (j)      a judgment or order for the payment of money in
         excess of $15,000,000 (net of applicable insurance coverage which is
         acknowledged by the insurer) shall be rendered against the Company or
         any Restricted Subsidiary and such judgment or order shall continue
         unsatisfied and unstayed for a period of 30 days;

                 (k)      any Person or two or more Persons acting in concert,
         together with any affiliates thereof, (i) shall have acquired
         beneficial ownership, directly or indirectly, (a) within any 12 month
         period, of (1) more than 25% of the Company's common stock or (2)
         securities representing more than 25% of the combined voting power of
         all securities of the Company entitled to vote in the election of
         directors (other than securities having such power only by reason of
         the happening of a contingency) ("Voting Securities"), or (b) within
         any 24 month period, of (1) more than 40% of the Company's common
         stock or (2) more than 40% of the Company's Voting Securities, (ii)
         owns a higher percentage of the Company's common stock or Voting
         Securities than the percentage owned by Kohlberg Kravis Roberts & Co.
         and/or non-operating investment entities it controls, and (iii) either
         (a) owns 50% or more of the Company's common stock or Voting
         Securities, (b) directly or indirectly elects or causes the election
         of Persons constituting in the aggregate a majority of the Board of
         Directors of the Company or any Restricted Subsidiary, or (c)
         exercises, directly or indirectly, by written agreement, control over
         the Company or any Restricted Subsidiary; provided that no Default or
         Event of Default shall occur under this subsection (k) until the
         Agent, following request by the Required Banks, gives notice to the
         Company that such an Event of Default is declared, and such notice may
         not be given after the date which is 45 days after the Banks actually
         receive notice from the Company to the effect that the matters set
         forth in clauses (i), (ii) and (iii) have occurred (for purposes of
         this provision, "beneficial ownership" shall mean beneficial ownership
         within the meaning of Rule 13d-3 of the Securities and Exchange
         Commission promulgated under the Securities Exchange Act of 1934, as
         amended, and the number and percentage of securities beneficially
         owned by any Person or Persons shall be calculated in accordance with
         such Rule); or

                 (l)      any "Event of Default", as defined in the Other
         Credit Agreement, shall occur;

then, and in every such event, the Agent shall (i) if requested by Banks having
at least 51% in the aggregate amount of the Commitments, by notice to the
Company terminate the Commitments and, upon the giving of such notice by the
Agent, they shall





                                      -52-
<PAGE>   58
thereupon terminate, and (ii) if requested by Banks holding Notes evidencing at
least 51% in aggregate principal amount of the Loans, by notice to the Company
declare the Notes (together with accrued interest thereon) to be, and, upon the
giving of such notice by the Agent, the Notes shall thereupon become,
immediately due and payable without notice of intent to accelerate, notice of
acceleration, presentment, demand, protest or other notice of any kind, all of
which are hereby waived by the Company; provided that in the case of any of the
Events of Default specified in clause (g) or (h) above, without any notice to
the Company or any other act by the Agent or the Banks, the Commitments shall
thereupon terminate and the Notes (together with accrued interest thereon)
shall become immediately due and payable without notice of intent to
accelerate, notice of acceleration, presentment, demand, protest or other
notice of any kind, all of which are hereby waived by the Company.

                 SECTION 6.02.  Notice of Default.  The Agent shall give notice
to the Company under Section 6.01(c) promptly upon being requested to do so by
any Bank and shall thereupon notify all the Banks thereof.


                                  ARTICLE VII

                                   THE AGENT

                 SECTION 7.01.  Appointment and Authorization.  Each Bank
irrevocably appoints and authorizes the Agent to take such action as agent on
its behalf and to exercise such powers under the Financing Documents as are
delegated to the Agent by the terms hereof or thereof, together with all such
powers as are reasonably incidental thereto.

                 SECTION 7.02.  Agent and Affiliates.  NationsBank shall have
the same rights and powers under the Financing Documents as any other Bank and
may exercise or refrain from exercising the same as though it were not the
Agent, and NationsBank and its affiliates may accept deposits from, lend money
to, and generally engage in any kind of business with the Company or any
Subsidiary or other affiliate of the Company as if it were not the Agent
hereunder.

                 SECTION 7.03.  Action by Agent.  The obligations of the Agent
under the Financing Documents are only those expressly set forth herein.
Without limiting the generality of the foregoing, the Agent shall not be
required to take any action with respect to any Default, except as expressly
provided in Article VI.

                 SECTION 7.04.  Consultation with Experts.  The Agent may
consult with legal counsel (who may be counsel for the Company or any
Subsidiary), independent public accountants, independent petroleum engineers
and other experts selected by it





                                      -53-
<PAGE>   59
and the Agent shall not be liable for any action taken or omitted to be taken
by it in good faith in accordance with the advice of such counsel, accountants,
engineers or experts.

                 SECTION 7.05.  Liability of Agent.  Neither the Agent nor any
of its directors, officers, agents or employees shall be liable for any action
taken or not taken by it in connection herewith (i) with the consent or at the
request of the Required Banks or (ii) in the absence of its own gross
negligence or willful misconduct.  Neither the Agent nor any of its directors,
officers, agents or employees shall be responsible for or have any duty to
ascertain, inquire into or verify (i) any statement, warranty or representation
made in connection with this Agreement or any borrowing hereunder; (ii) the
performance or observance of any of the covenants or agreements of the Company
or any Subsidiary; (iii) the satisfaction of any condition specified in Article
III, except receipt of items required to be delivered to the Agent; (iv) the
validity, effectiveness or genuineness of the Financing Documents or any other
instrument or writing furnished in connection herewith; or (v) the accuracy of
any Engineering Report.  The Agent shall not incur any liability by acting in
reliance upon any notice, consent, certificate, statement, or other writing
(which may be a bank wire, telex or similar writing) believed by it to be
genuine or to be signed by the proper party or parties.

                 SECTION 7.06.  Indemnification.  Each Bank shall, ratably in
accordance with its Commitment, indemnify the Agent (to the extent not
reimbursed by the Company) against any cost, expense (including counsel fees
and disbursements), claim, demand, action, loss or liability (except such as
result from the Agent's gross negligence or willful misconduct) that the Agent
may suffer or incur in connection with the Financing Documents or any action
taken or omitted by the Agent hereunder (IT BEING EXPRESSLY UNDERSTOOD AND
AGREED THAT, EXCEPT FOR SUCH NEGLIGENCE AS IS SO DETERMINED TO CONSTITUTE GROSS
NEGLIGENCE, SUCH INDEMNIFICATION DOES EXTEND TO THE CONSEQUENCES OF THE
ORDINARY NEGLIGENCE, WHETHER SOLE OR CONTRIBUTORY, OF THE AGENT).

                 SECTION 7.07.  Credit Decision.  Each Bank acknowledges that
it has, independently and without reliance upon the Agent or any other Bank,
and based on such documents and information as it has deemed appropriate, made
its own credit analysis and decision to enter into this Agreement.  Each Bank
also acknowledges that it will, independently and without reliance upon the
Agent or any other Bank, and based on such documents and information as it
shall deem appropriate at the time, continue to make its own credit decisions
in taking or not taking any action under this Agreement.





                                      -54-
<PAGE>   60
                 SECTION 7.08.  Successor Agent.  The Agent may resign at any
time by giving written notice thereof to the Banks and the Company and may be
removed at any time with or without cause by the Required Banks.  Upon any such
resignation or removal, the Company shall have the right, with the consent of
the Required Banks, to appoint a successor Agent.  If no successor Agent shall
have been so appointed with the consent of the Required Banks, and shall have
accepted such appointment, within 30 days after the retiring Agent's giving of
notice of resignation or the Required Banks' removal of the retiring Agent,
then the retiring Agent may, on behalf of the Banks, appoint a successor Agent,
which shall be a commercial bank organized or licensed under the laws of the
United States of America or of any State thereof and having a combined capital
and surplus of at least $50,000,000.  Upon the acceptance of its appointment as
Agent hereunder by a successor Agent, such successor Agent shall thereupon
succeed to and become vested with all the rights and duties of the retiring
Agent, and the retiring Agent shall be discharged from its duties and
obligations under the Financing Documents.  After any retiring Agent's
resignation or removal hereunder as Agent, the provisions of this Article VII
shall inure to its benefit as to any actions taken or omitted to be taken by it
while it was Agent.

                 SECTION 7.09.  Agent's Fees.  The Company shall pay to the
Agent for its own account fees in the amounts and at the times previously
agreed upon between the Company and the Agent.


                                  ARTICLE VIII

                            CHANGE IN CIRCUMSTANCES

                 SECTION 8.01.  Basis for Determining Interest Rate Inadequate
or Unfair.  If on or prior to the first day of any Interest Period:

                 (a)      the Agent is advised by the Reference Banks that
         deposits in dollars (in the applicable amounts) are not being offered
         to the Reference Banks in the relevant market for such Interest
         Period, or

                 (b)      Banks having 50% or more of the aggregate amount of
         the Commitments advise the Agent that the London Interbank Offered
         Rate as determined by the Agent will not adequately and fairly reflect
         the cost to such Banks of funding their Euro-Dollar Loans for such
         Interest Period,

the Agent shall forthwith give notice thereof to the Company and the Banks,
whereupon until the Agent notifies the Company that the circumstances giving
rise to such suspension no longer exist, (i) the obligations of the Banks to
make Euro-Dollar Loans,





                                      -55-
<PAGE>   61
or make any Conversion (other than changing Euro-Dollar Loans into Base Rate
Loans), shall be suspended, and (ii) unless the Company notifies the Agent at
least two Domestic Business Days before the date of any Euro-Dollar Borrowing
for which a Notice of Borrowing has previously been given that it elects not to
borrow on such date, such Borrowing shall instead be made as a Base Rate
Borrowing.

                 SECTION 8.02.  Illegality.  If, after the date of this
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 (or its
Euro-Dollar Lending Office) 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 (or its Euro-Dollar
Lending Office) to make, maintain or fund its Euro-Dollar Loans, or make any
Conversion (other than changing Euro-Dollar Loans into Base Rate Loans), and
such Bank shall so notify the Agent, the Agent shall forthwith give notice
thereof to the other Banks and the Company, whereupon until such Bank notifies
the Company and the Agent that the circumstances giving rise to such suspension
no longer exist, the obligation of such Bank to make Euro-Dollar Loans, or make
any Conversion (other than changing Euro-Dollar Loans into Base Rate Loans), as
the case may be, shall be suspended.  Before giving any notice to the Agent
pursuant to this Section, such Bank shall designate a different Euro-Dollar
Lending Office if such designation will avoid the need for giving such notice
and will not, in the judgment of such Bank, be otherwise disadvantageous to
such Bank.  If such Bank shall determine that it may not lawfully continue to
maintain and fund any of its outstanding Euro-Dollar Loans to maturity and
shall so specify in such notice, each such Euro-Dollar Loan shall be
immediately and automatically Converted into a Base Rate Loan (on which
interest and principal shall be payable contemporaneously with the related
Euro-Dollar Loans of the other Banks).

                 SECTION 8.03.  Increased Cost and Reduced Return.  (a) If
after the date hereof, 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 (or its Applicable Lending Office) with any request or directive (whether
or not having the force of law) of any such authority, central bank or
comparable agency:

                 (i)      shall subject any Bank (or its Applicable Lending
         Office) to any tax, duty or other charge with respect to its
         Euro-Dollar Loans, its Note or its obligation to make Euro-Dollar
         Loans, or shall change the basis of taxation of payments to any Bank
         (or its Applicable Lending Office) of the principal of or interest on
         its Euro-Dollar Loans or any





                                      -56-
<PAGE>   62
         other amounts due under this Agreement in respect of its Euro-Dollar
         Loans or its obligation to make Euro-Dollar Loans (except for changes
         in the rate of tax on the overall net income of such Bank or its
         Applicable Lending Office imposed by the jurisdiction in which such
         Bank's principal executive office or Applicable Lending Office is
         located); or

                 (ii)     shall impose, modify or deem applicable any reserve,
         special deposit or similar requirement (including, without limitation,
         any such requirement imposed by the Board of Governors of the Federal
         Reserve System against assets of, deposits with or for the account of,
         or credit extended by, any Bank (or its Applicable Lending Office) or
         on the United States market for certificates of deposit or the London
         interbank market any other condition affecting its Euro-Dollar Loans,
         its Note or its obligation to make Euro-Dollar Loans;

and the result of any of the foregoing is to increase the cost to such Bank (or
its Applicable Lending Office) of making or maintaining any Euro-Dollar Loan or
making any Conversion (other than changing Euro-Dollar Loans into Base Rate
Loans), or to reduce the amount of any sum received or receivable by such Bank
(or its Applicable Lending Office) under this Agreement or under its Note with
respect thereto, by an amount deemed by such Bank to be material, then, within
15 days after demand by such Bank (with a copy to the Agent), the Company shall
pay to such Bank such additional amount or amounts as will compensate such Bank
for such increased cost or reduction; provided that the Company shall not be
obligated to compensate any Bank for any such reduction attributable to a
period (i) more than 90 days prior to the giving of notice by such Bank to the
Company of its intention to seek compensation under this subsection (a) or (ii)
more than six months prior to the making of demand by such Bank for payment
thereof in accordance herewith.

                 (b)      If any Bank shall have determined that the adoption
of any applicable law, rule or regulation regarding capital adequacy, 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 any request or directive
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 capital of such Bank (or its Parent) as a
consequence of such Bank's obligations hereunder to a level below that which
such Bank (or its Parent) could have achieved but for such adoption, change,
request or directive (taking into consideration its policies with respect to
capital adequacy) by an amount deemed by such Bank to be material, then from
time to time, within 15 days after demand by such Bank (with a copy to the
Agent), the Company shall pay to such Bank such additional amount or amounts as
will compensate such





                                      -57-
<PAGE>   63
Bank (or its Parent) for such reduction; provided that the Company shall not be
obligated to compensate any Bank for any such reduction attributable to a
period (i) more than 90 days prior to the giving of notice by such Bank to the
Company of its intention to seek compensation under this subsection (b) or (ii)
more than six months prior to the making of demand by such Bank for payment
thereof in accordance therewith.

                 (c)      Each Bank will promptly notify the Company and the
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 and will
designate a different Applicable Lending Office if such designation will avoid
the need for, or reduce the amount of, such compensation and will not, in the
judgment of such Bank, be otherwise disadvantageous to such Bank.  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.  In determining such amount, such
Bank may use any reasonable averaging and attribution methods.

                 SECTION 8.04.  Base Rate Loans Substituted for Affected
Euro-Dollar Loans.  If (i) the obligation of any Bank to make Euro-Dollar Loans
to the Company has been suspended pursuant to Section 8.02 or (ii) any Bank has
demanded compensation under Section 8.03(a) and the Company shall, by at least
five Euro-Dollar Business Days' prior notice to such Bank through the Agent,
have elected that the provisions of this Section shall apply to such Bank,
then, unless and until such Bank notifies the Company that the circumstances
giving rise to such suspension or demand for compensation no longer apply:

                 (a)      all Loans to the Company which would otherwise be
         made by such Bank as, or be Converted by such Bank as or into,
         Euro-Dollar Loans shall instead be made as, or Converted into, Base
         Rate Loans (on which interest and principal shall be payable
         contemporaneously with the related Euro-Dollar Loans of the other
         Banks), and

                 (b)      after each of its Euro-Dollar Loans to the Company
         has been repaid, all payments of principal which would otherwise be
         applied to repay such Euro-Dollar Loans shall be applied to repay its
         Base Rate Loans instead.

                 SECTION 8.05.  Substitution of Bank.  If (i) the obligation of
any Bank to make Euro-Dollar Loans has been suspended pursuant to Section 8.02,
(ii) any Bank has demanded compensation under Section 8.03 or payment of Taxes
or Other Taxes under Section 2.17, or (iii) after satisfaction of all
applicable conditions precedent, any Bank fails to fund when due any Loan it is
obligated to fund under this Agreement, the Company shall have the right, with
the assistance of the Agent, to seek a mutually satisfactory substitute bank or
banks (which may be one or more of the Banks) to





                                      -58-
<PAGE>   64
purchase the Notes and assume the Commitment of such Bank (any such Bank is
herein called an "Affected Bank").  Each Affected Bank agrees to sell, without
recourse, all of its Commitment, its interest in this Agreement and its Note to
any such bank for an amount equal to the sum of the outstanding unpaid
principal of and accrued interest on the Loans of such Affected Bank and all
commitment fees and other fees and amounts due such Affected Bank hereunder,
calculated, in each case, to the date such Commitment, interest in this
Agreement and Note are purchased.


                                   ARTICLE IX

                                 MISCELLANEOUS

                 SECTION 9.01.  Notices.  All notices, requests and other
communications to any party hereunder shall be in writing (including bank wire,
telex, facsimile transmission or similar writing) and shall be given to such
party: (x) in the case of the Company or the Agent, at its address or telex
number set forth on the signature pages hereof, (y) in the case of any Bank, at
its address or telex number set forth in its Administrative Questionnaire or
(z) in the case of any party, such other address or telex number as such party
may hereafter specify for the purpose by notice to the Agent and the Company.
Each such notice, request or other communication shall be effective (i) if
given by telex, when such telex is transmitted to the telex number specified in
this Section and the appropriate answer-back is received, (ii) if given by
mail, 72 hours after such communication is deposited in the mails with first
class postage prepaid, addressed as aforesaid, (iii) if given by facsimile
transmission, when such facsimile is transmitted and accompanied by a telephone
call to the party receiving such transmission or (iv) if given by any other
means, when delivered at the address specified in this Section; provided that
notices to the Agent shall not be effective until received.

                 SECTION 9.02.  No Waivers.  No failure or delay by the Agent
or any Bank in exercising any right, power or privilege under any Financing
Document shall operate as a waiver thereof nor shall any single or partial
exercise thereof preclude any other or further exercise thereof or the exercise
of any other right, power or privilege.  The rights and remedies provided in
the Financing Documents shall be cumulative and not exclusive of any rights or
remedies provided by law.

                 SECTION 9.03.  Expenses; Indemnification.  (a) The Company
shall pay (i) all reasonable documented out-of-pocket costs and expenses of
the Agent and the Arranger incurred in connection with the syndication of this
Agreement or the preparation of the Financing Documents, any waiver or consent
thereunder or any amendment thereof or any Default or alleged Default hereunder
and (ii) if an Event of Default occurs, all reasonable out-of-pocket costs and
expenses incurred by the Agent or incurred by any Bank, including fees and
disbursements of counsel, in connection





                                      -59-
<PAGE>   65
with such Event of Default and collection and other enforcement proceedings
resulting therefrom.

                 (b)      The Company agrees to indemnify the Agent, each
Co-Agent, the Arranger and each Bank and hold the Agent, each Co-Agent, the
Arranger and 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 for the Agent, any Co-Agent,
the Arranger or any Bank in connection with any investigative, administrative
or judicial proceedings, whether or not the Agent, such Co-Agent, the Arranger
or such Bank, as the case may be, shall be designated a party thereto) which
may be incurred by the Agent, any Co-Agent, the Arranger or any Bank, relating
to or arising out of this Agreement or any actual or proposed use of proceeds
of Loans hereunder, including specifically, without limitation, all
liabilities, losses, damages, costs and expenses arising out of a violation of
any Environmental Law; provided that neither the Agent nor any Co-Agent nor the
Arranger nor any 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 (IT BEING EXPRESSLY UNDERSTOOD AND AGREED THAT, EXCEPT
FOR SUCH NEGLIGENCE AS IS SO DETERMINED TO CONSTITUTE GROSS NEGLIGENCE, SUCH
INDEMNIFICATION DOES EXTEND TO THE CONSEQUENCES OF THE ORDINARY NEGLIGENCE,
WHETHER SOLE OR CONTRIBUTORY, OF THE INDEMNITEE).

                 (c)      Within a reasonable period of time after any Person
entitled to indemnification under Section 9.03(b) (an "Indemnified Person")
receives actual notice of the assertion of any claim or the commencement of any
action, or any threatened claim or action, covered by Section 9.03(b), such
Indemnified Person shall, if indemnification with respect thereof is to be
sought from the Company under Section 9.03(b), notify the Company in writing of
such claim or action; provided that the failure to so notify the Company shall
not relieve the Company from any liability which the Company may have to the
Indemnified Person under Section 9.03(b) unless the obligations of the Company
under Section 9.03(b) have been significantly increased as a result of such
failure.  The Company and such Indemnified Person shall cooperate in the
defense of any such claim or action and shall take those actions reasonably
within their power to take which are necessary to preserve any legal defenses
to such matters.  If any such claim or action shall be brought or threatened
against an Indemnified Person, so long as no Event of Default exists, the
Company shall be entitled to participate in the defense thereof, and, with the
consent of such Indemnified Person, to assume the defense thereof with counsel
reasonably satisfactory to the Indemnified Person.  Notwithstanding any
provision hereof to the contrary, no consent order or settlement shall be
entered into in any such claim or action unless both the Company and such
Indemnified Person have given their prior written consent thereto; provided
that such consent of the Company shall not be required if any Event of Default
exists.





                                      -60-
<PAGE>   66
                 (d)      All obligations of the Company to indemnify or
otherwise to make payments to the Agent, any Co-Agent, the Arranger or any
Bank provided in this Agreement shall survive any termination of the
Commitments and the repayment of the Loans.

                 SECTION 9.04.  Sharing of Set-Offs, Etc.  Each Bank agrees
that if it shall, by exercising any right of set-off or counterclaim or
otherwise, receive payment of a proportion of the aggregate amount of principal
and interest due with respect to any Note held by it which is greater than the
proportion received by any other Bank in respect of the aggregate amount of
principal and interest due with respect to any Note held by such other Bank,
the Bank receiving such proportionately greater payment shall purchase such
participations in the Notes held by the other Banks, and such other adjustments
shall be made, as may be required so that all such payments of principal and
interest with respect to the Notes held by the Banks shall be shared by the
Banks pro rata; provided that nothing in this Section shall impair the right of
any Bank to exercise any right of set-off or counterclaim it may have and to
apply the amount subject to such exercise to the payment of indebtedness of the
Company other than its indebtedness under the Notes.  The Company agrees, to
the fullest extent it may effectively do so under applicable law, that any
holder of a participation in a Note, whether or not acquired pursuant to the
foregoing arrangements, may exercise rights of set-off or counterclaim and
other rights with respect to such participation as fully as if such holder of a
participation were a direct creditor of the Company in the amount of such
participation.

                 SECTION 9.05.  Amendments and Waivers.  Any provision of this
Agreement or the Notes may be amended or waived, if, but only if, such
amendment or waiver is in writing and is signed by the Company and the Required
Banks (and, if the rights or duties of the Agent are affected thereby, by the
Agent); provided that no such amendment or waiver shall, unless signed by all
the Banks, (i) increase or decrease the Commitment of any Bank or subject any
Bank to any additional obligation, (ii) reduce the principal of or rate of
interest on any Loan or any fees hereunder, (iii) postpone the date fixed for
any payment of principal of or interest on any Loan or any fees hereunder or
for any reduction or termination of any Commitment, or (iv) change the
percentage of the Commitments or of the aggregate unpaid principal amount of
the Notes, or the number of Banks, which shall be required for the Banks or any
of them to take any action under this Section or any other provision of this
Agreement.

                 SECTION 9.06.  Successors and Assigns.  (a) The provisions of
this Agreement shall be binding upon and inure to the benefit of the parties
hereto and their respective successors and assigns, except that the Company may
not assign or otherwise transfer any of its rights under this Agreement without
the prior written consent of all Banks.





                                      -61-
<PAGE>   67
                 (b)      Any Bank may at any time and from time to 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 the Company and the Agent, such Bank shall remain
responsible for the performance of its obligations hereunder, and the Company
and the Agent shall continue to deal solely and directly with such Bank in
connection with such Bank's rights and obligations under this Agreement.  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 the Company hereunder including, without limitation,
the right to approve any amendment, modification or waiver of any provision of
this Agreement; provided that such participation agreement may provide that
such Bank will not agree to any modification, amendment or waiver of this
Agreement described in clause (i), (ii) or (iii) of Section 9.05 without the
consent of the Participant.  The Company agrees that each Participant shall, to
the extent provided in its participation agreement, be entitled to the benefits
of Article VIII with respect to its participating interest.  An assignment or
other transfer which is not permitted by subsection (c) or (d) below shall be
given effect for purposes of this Agreement only to the extent of a
participating interest granted in accordance with this subsection (b).

                 (c)      Any Bank may at any time assign to one or more banks
or other institutions (each an "Assignee") a proportionate part of all of its
rights and obligations under this Agreement and the Notes in an amount which,
when added to the amount of the rights and obligations under the Other Credit
Agreement contemporaneously assigned by such transferor Bank to such Assignee
pursuant to the second proviso to the first sentence of Section 9.06(c) of the
Other Credit Agreement, equals $10,000,000 or more, and such Assignee shall
assume such rights and obligations under this Agreement and the Notes, pursuant
to an Assignment executed by such Assignee and such transferor Bank, with (and
subject to) the subscribed consent of the Company and the Agent (which such
consents shall not be unreasonably withheld); provided that if an Assignee is
an affiliate of such transferor Bank or is another Bank, no such consent of the
Company shall be required; provided further that each such assignment shall be
of a constant, and not a varying, percentage of all rights and obligations
under this Agreement and the Notes, and the same constant percentage of all
rights and obligations of such transferor Bank under the Other Credit Agreement
and the notes thereunder shall be contemporaneously assigned by such transferor
Bank to such Assignee pursuant to Section 9.06(c) of the Other Credit
Agreement.  Upon execution and delivery of such instrument (and delivery to the
Agent of an Administrative Questionnaire with respect to such Assignee, if such
Assignee has not already done so) and 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
Agreement and shall have all the rights and obligations of a Bank with a
Commitment as set forth in such instrument of assumption, and the transferor
Bank





                                      -62-
<PAGE>   68
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, the Agent and the Company shall make appropriate arrangements so that, if
required, a new Note is issued to the Assignee.  In connection with any such
assignment, the transferor Bank shall pay to the Agent for its account an
administrative fee for processing such assignment in the amount of $2,500 less
any administrative processing fee paid to the Agent on the same date under
Section 9.06(c) of the Other Credit Agreement as a result of the
contemporaneous assignment to such Assignee by such transferor Bank under the
Other Credit Agreement pursuant to the second proviso to the first sentence of
this Section 9.06(c).  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 the Company and the Agent certification as to exemption from deduction or
withholding of any United States federal income taxes in accordance with
Section 2.17.  Notwithstanding the first sentence of this subsection (c), a
Bank may not make an assignment pursuant to this subsection (c) if after giving
effect thereto such Bank would hold less than 1.5% (or until March 15, 1998, 3%
in the case of NationsBank, Bank of America National Trust and Savings
Association and Union Bank of Switzerland, Houston Agency) of the Commitments
(for this purpose such Bank shall be deemed to hold any participating interests
granted by such Bank pursuant to subsection (b) above and any rights assigned
pursuant to subsection (d) below).

                 (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, Participant or other transferee of any
Bank's rights shall be entitled to receive any greater payment under Section
8.03 than such Bank would have been entitled to receive with respect to the
rights transferred, unless such transfer is made with the Company's prior
written consent or by reason of the provisions of Section 8.02 or 8.03
requiring such Bank to designate a different Applicable Lending Office under
certain circumstances or at a time when the circumstances giving rise to such
greater payment did not exist.

                 SECTION 9.07.  Collateral.  Each of the Banks represents to
each Agent and each of the other Banks that it in good faith is not relying
upon any margin stock (as defined in Regulation G) or any margin stock (as
defined in Regulation U) as collateral in the extension or maintenance of the
credit provided for in this Agreement.

                 SECTION 9.08.  Texas Law.  This Agreement and each Note shall
be construed in accordance with and governed by the law of the State of Texas.





                                      -63-
<PAGE>   69
                 SECTION 9.09.  CONSENT TO JURISDICTION.  THE COMPANY HEREBY
IRREVOCABLY CONSENTS TO THE NONEXCLUSIVE JURISDICTION OF THE COURTS OF THE
STATE OF TEXAS AND OF ANY FEDERAL COURT LOCATED IN SUCH STATE OVER IT IN
CONNECTION WITH ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO ANY
FINANCING DOCUMENT AND, TO THE FULLEST EXTENT PERMITTED BY LAW, FURTHER AGREES
(AND SHALL NOT CONTEST) THAT THE PROPER VENUE FOR FILING AND MAINTAINING ANY
SUCH ACTION OR PROCEEDING SHALL BE IN THE STATE OF TEXAS.  IN ANY SUCH ACTION
OR PROCEEDING, THE COMPANY WAIVES PERSONAL SERVICE OF ANY SUMMONS, COMPLAINT OR
OTHER PROCESS OR NOTICE AND AGREES THAT SERVICE BY FIRST CLASS MAIL, RETURN
RECEIPT REQUESTED, TO THE COMPANY AT ITS ADDRESS FOR NOTICES HEREUNDER, OR ANY
FORM OF SERVICE PROVIDED FOR IN THE TEXAS CIVIL PRACTICE AND REMEDIES CODE THEN
IN EFFECT SHALL CONSTITUTE GOOD AND SUFFICIENT SERVICE UPON THE COMPANY.

                 SECTION 9.10.  Counterparts.  This Agreement may be signed in
any number of counterparts, each of which shall be an original, with the same
effect as if the signatures thereto and hereto were upon the same instrument.

                 SECTION 9.11.  WAIVER OF JURY TRIAL.  THE COMPANY, THE AGENT,
THE CO-AGENTS AND THE BANKS HEREBY IRREVOCABLY WAIVE ANY AND ALL RIGHT TO TRIAL
BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT OR
THE TRANSACTIONS CONTEMPLATED HEREBY.

                 SECTION 9.12.  COMPLETE AGREEMENT.  THIS WRITTEN CREDIT
AGREEMENT AND THE OTHER FINANCING DOCUMENTS REPRESENT THE FINAL AGREEMENT AMONG
THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS,
OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO UNWRITTEN ORAL
AGREEMENTS AMONG THE PARTIES.

                 SECTION 9.13.  Liability of Co-Agents and Arranger.  Neither
the Arranger nor either Co-Agent, in its capacity as Co-Agent hereunder, shall
have any duty or responsibility hereunder.

                 SECTION 9.14.  Termination of 1995 Short-Term Commitments.
Each of the parties hereto agrees that all "Commitments" (as defined in the
$100,000,000 Credit Agreement dated as of April 24, 1995 among the Company,
NationsBank, as





                                      -64-
<PAGE>   70
agent and the co-agent and lenders parties thereto) are hereby terminated
effective as of the close of business on March 28, 1996 (and the fees under
Section 2.08(a) of such Credit Agreement shall accrue through such date), and
the Company has no further right to borrow thereunder.  The Company represents
and warrants that all principal, interest and fees owed thereunder have been
paid in full.

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


                                        UNION TEXAS PETROLEUM HOLDINGS, INC.


                                        By    /s/ M.N. MARKOWITZ              
                                           -------------------------------
                                              M.N. Markowitz   
                                              Vice President and Treasurer
                                              1330 Post Oak Blvd.
                                              Houston, Texas 77056
                                              Telex number: 762255

Commitments

$7,727,272.72                           NATIONSBANK OF TEXAS, N.A.


                                        By    /s/ PAUL A. SQUIRES            
                                           -------------------------------
                                              Paul A. Squires 
                                              Senior Vice President


$5,909,090.90                           BANK OF AMERICA NATIONAL TRUST 
                                        AND SAVINGS ASSOCIATION


                                        By    /s/ RICHARD D. BLUTH
                                           -------------------------------
                                              Authorized Officer





                                      -65-
<PAGE>   71
Commitments
                                        
$5,909,090.90                           UNION BANK OF SWITZERLAND, 
                                        HOUSTON AGENCY


                                        By    /s/ J. GEORGE KUBOVE
                                           -------------------------------
                                              Authorized Officer


                                        By    /s/ KELLY BOOTS
                                           -------------------------------
                                              Authorized Officer


$4,545,454.55                           THE BANK OF NOVA SCOTIA


                                        By    /s/ F.C.H. ASHBY
                                           -------------------------------
                                              Authorized Officer


$4,545,454.55                           CHEMICAL BANK


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$4,545,454.55                           CITIBANK, N.A.


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$4,545,454.55                           CREDIT LYONNAIS CAYMAN ISLAND BRANCH


                                        By    /s/ PASCAL POUPELLE
                                           -------------------------------
                                              Authorized Officer





                                      -66-
<PAGE>   72
Commitments

$4,545,454.55                           THE FIRST NATIONAL BANK OF CHICAGO


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Agent


$4,545,454.55                           LTCB TRUST COMPANY


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$4,545,454.55                           MELLON BANK, N.A.


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$4,545,454.55                           MORGAN GUARANTY TRUST COMPANY OF NEW 
                                        YORK


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$4,545,454.55                           NATIONAL WESTMINSTER BANK PLC
                                        (NEW YORK BRANCH)


                                        By    /s/ PAUL K. CARTER
                                           -------------------------------
                                              Authorized Officer


                                        NATIONAL WESTMINSTER BANK PLC
                                        (NASSAU BRANCH)


                                        By    /s/ PAUL K. CARTER
                                           -------------------------------
                                              Authorized Officer



                                      -67-
<PAGE>   73
Commitments
                                        
$4,545,454.55                           SOCIETE GENERALE, SOUTHWEST AGENCY


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$3,181,818.18                           BANK OF TAIWAN


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$3,181,818.18                           BANK OF TOKYO, LTD.,  DALLAS AGENCY


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$3,181,818.18                           BANQUE NATIONALE DE PARIS,
                                                             HOUSTON AGENCY


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$3,181,818.18                           BANQUE PARIBAS, HOUSTON AGENCY


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer





                                      -68-
<PAGE>   74
Commitments

$3,181,818.18                           BANQUE FRANCAISE DU COMMERCE EXTERIEUR


                                        By    /s/ TIMOTHY L. POLVADO
                                           -------------------------------
                                              Authorized Officer


                                        By    /s/ MARK A. HARRINGTON
                                           -------------------------------
                                              Authorized Officer


$3,181,818.18                           CHRISTIANIA BANK


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$3,181,818.18                           DEN NORSKE BANK AS


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer





                                      -69-
<PAGE>   75
Commitments

$3,181,818.18                           DRESDNER BANK AG, NEW YORK AND GRAND 
                                        CAYMAN BRANCHES


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$3,181,818.18                           FIRST INTERSTATE BANK OF TEXAS, N.A.


                                        By    /s/ COLLIE C. MICHAELS
                                           -------------------------------
                                              Authorized Officer


$3,181,818.18                           THE MITSUBISHI TRUST & BANKING 
                                        CORPORATION


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer


$3,181,818.18                           THE YASUDA TRUST AND BANKING COMPANY, 
                                        LIMITED, NEW YORK BRANCH


                                        By    /s/ [ILLEGIBLE]
                                           -------------------------------
                                              Authorized Officer

Total Commitments:  $100,000,000.00





                                      -70-
<PAGE>   76
                                        NATIONSBANK OF TEXAS, N.A., as Agent


                                        By    /s/ PAUL A. SQUIRES
                                           -------------------------------
                                              Paul A. Squires
                                              Senior Vice President
                                                700 Louisiana Street
                                                Houston, Texas  77002
                                                Telex Number:  163244
                                                Answerback:  NCNBTEXDAL


                                        BANK OF AMERICA NATIONAL TRUST AND 
                                        SAVINGS ASSOCIATION, as Co-Agent


                                        By    /s/ RICHARD D. BLUTH
                                           -------------------------------
                                              Authorized Officer


                                        UNION BANK OF SWITZERLAND, HOUSTON 
                                        AGENCY, as Co-Agent


                                        By    /s/ J. GEORGE KUBOVE
                                           -------------------------------
                                              Authorized Officer


                                        By    /s/ KELLY BOOTS
                                           -------------------------------
                                              Authorized Officer





                                      -71-
<PAGE>   77


The following describes the Schedules and Exhibits to the Credit Agreement,
which are omitted herein, but which will be furnished upon request:

Schedule I       Sets forth the Facility Fee and Applicable Margin at various
                 Rating Levels.

Schedule II      Part A lists the Existing Unrestricted Subsidiaries and
                 Existing Unimar Unrestricted Subsidiaries.  
                 Part B lists the Existing Restricted Subsidiaries, Other 
                 Restricted Subsidiary and Existing Unimar Restricted 
                 Subsidiaries.

Schedule III     Part A describes Liens on ownership interests.
                 Part B describes other existing Liens.

Schedule IV      Describes certain existing restrictions.

Schedule V       Sets forth the Joint Venture Debt Agreements.

Schedule VI      Describes outstanding options.

Exhibit A        Form of Note

Exhibit B        Form of Assignment and Assumption Agreement

Exhibit C        Form of Opinion of Counsel to the Company

Exhibit D        Form of Opinion of Special Counsel to the Company

Exhibit E        Form of Opinion of Special Counsel to the Agent
                 


<PAGE>   1
                                                                     EXHIBIT 15


                   INDEPENDENT ACCOUNTANTS' AWARENESS LETTER



Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C.  20549

Dear Sirs:

We are aware that Union Texas  Petroleum  Holdings,  Inc. has  included our
report dated April 23, 1996 (issued  pursuant to the  provisions  of  Statement
on  Auditing  Standards  No.  71) in the  prospectuses  constituting  part of
the  following registration statements:

    Registration Statement on Form S-8 (No. 33-26105) filed on December 21, 1988
    Registration Statement on Form S-8 (No. 33-13575) filed on April 29, 1991
    Registration Statement on Form S-8 (No. 33-21684) filed on April 29, 1991
    Registration Statement on Form S-8 (No. 33-44045) filed on November 19, 1991
    Registration Statement on Form S-8 (No. 33-64928) filed on June 24, 1993
    Registration Statement on Form S-8 (No. 33-59213) filed on May 10, 1995
    Registration Statement on Form S-3 (No. 33-64049) filed on November 7, 1995

We are also aware of our responsibilities under the Securities Act of 1933.

Yours very truly,



Price Waterhouse LLP
Houston, Texas
April 23, 1996

                                       1


<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S SEC FORM 10-Q FOR THE PERIOD ENDING MARCH 31, 1996 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               MAR-31-1996
<CASH>                                          11,860
<SECURITIES>                                         0
<RECEIVABLES>                                   73,042
<ALLOWANCES>                                        75
<INVENTORY>                                     42,382
<CURRENT-ASSETS>                               152,154
<PP&E>                                       2,865,564
<DEPRECIATION>                               1,344,358
<TOTAL-ASSETS>                               1,796,383
<CURRENT-LIABILITIES>                          204,184
<BONDS>                                        640,796
                                0
                                          0
<COMMON>                                         4,391
<OTHER-SE>                                     459,546
<TOTAL-LIABILITY-AND-EQUITY>                 1,796,383
<SALES>                                        258,178
<TOTAL-REVENUES>                               267,556
<CGS>                                           80,064
<TOTAL-COSTS>                                  140,670
<OTHER-EXPENSES>                                14,207
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               7,848
<INCOME-PRETAX>                                104,831
<INCOME-TAX>                                    57,270
<INCOME-CONTINUING>                             47,561
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    47,561
<EPS-PRIMARY>                                      .54
<EPS-DILUTED>                                        0
        

</TABLE>


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