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                                                                 EXHIBIT 10.12
 
                      UNION TEXAS PETROLEUM HOLDINGS, INC.
 
                              1994 INCENTIVE PLAN
 
SECTION 1. PURPOSE OF THE PLAN
 
     The Union Texas Petroleum Holdings, Inc. 1994 Incentive Plan (the "Plan")
is intended to promote the interests of Union Texas Petroleum Holdings, Inc., a
Delaware corporation (the "Company"), by encouraging employees of the Company,
its subsidiaries and affiliated entities, and non-employee directors of the
Company to acquire or increase their equity interest in the Company and to
provide a means whereby employees may develop a sense of proprietorship and
personal involvement in the development and financial success of the Company,
and to encourage them to remain with and devote their best efforts to the
business of the Company thereby advancing the interests of the Company and its
shareholders. The Plan is also contemplated to enhance the ability of the
Company, its subsidiaries and affiliated entities to attract and retain the
services of individuals who are essential for the program, growth and
profitability of the Company.
 
SECTION 2. DEFINITIONS
 
     As used in the Plan, the following terms shall have the meanings set forth
below:
 
          "Affiliate" shall mean (i) any entity that, directly or through one or
     more intermediaries, is controlled by the Company and (ii) any entity in
     which the Company has a significant equity interest, as determined by the
     Committee.
 
          "Award" shall mean any Option, Stock Appreciation Right, Restricted
     Stock, Performance Award, Stock Compensation Award, Deferred Shares, Bonus
     Shares, Other Stock-Based or Cash Award.
 
          "Award Agreement" shall mean any written agreement, contract, or other
     instrument or document evidencing any Award, which may, but need not, be
     executed or acknowledged by a participant.
 
          "Board" shall mean the Board of Directors of the Company.
 
          "Bonus Shares" shall mean an award of Shares granted pursuant to
     Section 6(e) of the Plan.
 
          "Cash Award" shall mean an award payable in cash granted pursuant to
     Section 6(g) of the Plan.
 
          "Code" shall mean the Internal Revenue Code of 1986, as amended from
     time to time, and the rules and regulations thereunder.
 
          "Committee" shall mean the Organization and Compensation Committee of
     the Board.
 
          "Covered Employees" shall have the meaning specified in Section
     162(m)(3) of the Code.
 
          "Deferred Shares" shall mean an Award of the right to receive Shares
     issued at the end of a Restricted Period which is granted pursuant to
     Section 6(f) of the Plan.
 
          "Disability" shall mean (i) with respect to an Employee of the Company
     or of any Affiliate, becoming permanently disabled under the standards of
     the Company's disability program as determined by the Committee or (ii)
     with respect to a non-employee Director, inability to perform duties and
     services as a director of the Company by reason of a medically determinable
     physical or mental impairment supported by medical evidence which in the
     opinion of the Committee can be expected to result in death or which can be
     expected to last for a continuous period of not less than twelve (12)
     months.
 
          "Employee" shall mean any employee of the Company or of any Affiliate.
 
          "Exchange Act" shall mean the Securities Exchange Act of 1934, as
     amended.
 
          "Fair Market Value" shall mean the fair market value of the property
     or other item being valued, as determined by the Committee. With respect to
     Shares, if the Shares are traded on a national stock
 
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     exchange, the fair market value of a Share on a particular date shall be
     equal to the average of the reported high and low sales prices of the Share
     on such exchange on that date, or if no prices are reported on that date,
     on the last preceding date on which such prices of the Share are so
     reported. If the Shares are publicly traded but are not traded on a
     national stock exchange at the time a determination of its fair market
     value is required to be made hereunder, its fair market value shall be
     deemed to be equal to the average between the closing bid and asked price
     of the Share on the most recent date the Shares were publicly traded. In
     the event the Shares are not publicly traded at the time a determination of
     its fair market value is required to be made hereunder, the determination
     of fair market value shall be made in good faith by the Committee.
 
          "Incentive Stock Option" or "ISO" shall mean an option granted under
     Section 6(a) of the Plan that is intended to qualify as an "incentive stock
     option" under Section 422 of the Code or any successor provision thereto.
 
          "non-employee Director" shall mean a director of the Company who is
     not (i) otherwise an employee of the Company or any Affiliate or (ii) a
     general partner, limited partner or employee of Kohlberg Kravis Roberts &
     Co.
 
          "Non-Qualified Stock Option" or "NQO" shall mean an option granted
     under Sections 6(a) or 6(h) of the Plan that is not intended to be an
     Incentive Stock Option.
 
          "Option" shall mean an Incentive Stock Option or a Non-Qualified Stock
     Option.
 
          "Other Stock-Based Award" shall mean any right granted under Section
     6(g) of the Plan.
 
          "Participant" shall mean any individual granted an Award under the
     Plan. Any other provisions hereof to the contrary notwithstanding, no
     non-employee Director may receive benefits under this Plan except for
     Non-Qualified Stock Options as provided in Section 6(h).
 
          "Performance Award" shall mean any right granted under Section 6(d) of
     the Plan.
 
          "Person" shall mean individual, corporation, partnership, association,
     joint-stock company, trust, unincorporated organization, government or
     political subdivision thereof or other entity.
 
          "Restricted Period" shall mean the period established by the Committee
     with respect to an Award during which the Award either remains subject to
     forfeiture or is not exercisable by the Participant.
 
          "Restricted Stock" shall mean any Share, prior to the lapse of
     restrictions thereon, granted under Section 6(c) of the Plan.
 
          "Retirement" shall mean (i) with respect to an employee of the Company
     or one of its Affiliates, retirement as determined by the Committee, and
     (ii) with respect to a non-employee Director of the Company, termination of
     service as a director or honorary director, after at least five (5) years
     of continuous service.
 
          "Rule 16b-3" shall mean Rule 16b-3 promulgated by the SEC under the
     Exchange Act, or any successor rule or regulation thereto as in effect from
     time to time.
 
          "SEC" shall mean the Securities and Exchange Commission, or any
     successor thereto.
 
          "Shares" or "Common Shares" or "Common Stock" shall mean the common
     stock of the Company, $0.05 par value, and such other securities or
     property as may become the subject of Awards or become subject to Awards
     pursuant to an adjustment made under Section 4(c) of the Plan.
 
          "Stock Appreciation Right" or "Right" shall mean any right to receive
     the appreciation of Shares granted under Section 6(b) of the Plan.
 
          "Stock Compensation" shall mean any right granted under Section 6(e)
     of the Plan.
 
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          "Substitute Award" shall mean Awards granted in assumption of, or in
     substitution for, outstanding awards previously granted by (i) a company
     acquired by the Company or one or more of its Affiliates, or (ii) a company
     with which the Company or one or more of its Affiliates combines.
 
SECTION 3. ADMINISTRATION
 
     The Plan shall be administered by the Committee, which Committee shall
consist of at least two members. Members of the Committee shall be
"disinterested persons" within the meaning of Rule 16b-3 which has been adopted
by the SEC under the Exchange Act as such Rule or its equivalent is then in
effect. A majority of the Committee shall constitute a quorum, and the acts of
the members of the Committee who are present at any meeting thereof at which a
quorum is present, or acts unanimously approved by the members of the Committee
in writing, shall be the acts of the Committee. Subject to the terms of the Plan
and applicable law, and in addition to other express powers and authorizations
conferred on the Committee by the Plan, the Committee shall have full power and
authority to: (i) designate Participants; (ii) determine the type or types of
Awards to be granted to an eligible Employee; (iii) determine the number of
Shares to be covered by, or with respect to which payments, rights, or other
matters are to be calculated in connection with, Awards; (iv) determine the
terms and conditions of any Award; (v) determine whether, to what extent, and
under what circumstances Awards may be settled or exercised in cash, Shares,
other securities, other Awards or other property, or cancelled, forfeited, or
suspended and the method or methods by which Awards may be settled, exercised,
cancelled, forfeited, or suspended; (vi) determine whether, to what extent, and
under what circumstances cash, Shares, other securities, other Awards, other
property, and other amounts payable with respect to an Award shall be deferred
either automatically or at the election of the holder thereof or of the
Committee; (vii) interpret and administer the Plan and any instrument or
agreement relating to, or Award made under, the Plan; (viii) establish, amend,
suspend, or waive such rules and regulations and appoint such agents as it shall
deem appropriate for the proper administration of the Plan; and (ix) make any
other determination and take any other action that the Committee deems necessary
or desirable for the administration of the Plan. Unless otherwise expressly
provided in the Plan, all designations, determinations, interpretations, and
other decisions under or with respect to the Plan or any Award shall be within
the sole discretion of the Committee, may be made at any time and shall be
final, conclusive, and binding upon all Persons, including the Company, any
Affiliate, any Participant, any holder or beneficiary of any Award, any
stockholder and any Employee. The provisions of this Section 3 with respect to
decisions made by, and authority of, the Committee shall be subject to the
controlling provisions of Section 6(h).
 
SECTION 4. SHARES AVAILABLE FOR AWARDS
 
  (a) Shares Available
 
     Subject to Section 4(d) and to adjustment as provided in Section 4(c), the
number of Shares with respect to which Awards may be granted under the Plan
shall be 4,000,000. If, after the effective date of the Plan, any Shares covered
by an Award granted under the Plan, or to which such an Award relates, are
forfeited, or if an Award otherwise terminates or is cancelled without the
delivery of Shares or of other consideration, then the Shares covered by such
Award, or to which such Award relates, or the number of Shares otherwise counted
against the aggregate number of Shares with respect to which Awards may be
granted, to the extent of any such forfeiture, termination or cancellation,
shall again be, or shall become, to the extent permissible under Rule 16b-3,
Shares with respect to which Awards may be granted. In the event that any Option
or other Award granted hereunder is exercised through the delivery of Shares,
the number of Shares available for Awards (other than an Incentive Stock Option)
under the Plan shall be increased by the number of Shares surrendered, to the
extent permissible under Rule 16b-3. Notwithstanding the foregoing, no more than
1,200,000 Shares available for Awards shall be issued as Restricted Stock.
 
  (b) Sources of Shares Deliverable Under Awards
 
     Any Shares delivered pursuant to an Award may consist, in whole or in part,
of authorized and unissued Shares or of treasury Shares.
 
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  (c) Adjustments
 
     In the event that the Committee determines that any dividend or other
distribution (whether in the form of cash, Shares, other securities, or other
property), recapitalization, stock split, reverse stock split, reorganization,
merger, consolidation, split-up, spin-off, combination, repurchase, or exchange
of Shares or other securities of the Company, issuance of warrants or other
rights to purchase Shares or other securities of the Company, or other similar
corporate transaction or event affects the Shares such that an adjustment is
determined by the Committee to be appropriate in order to prevent dilution or
enlargement of the benefits or potential benefits intended to be made available
under the Plan, then the Committee shall, in such manner as it may deem
equitable, adjust any or all of (i) the number and type of Shares (or other
securities or property) with respect to which Awards may be granted, (ii) the
number and type of Shares (or other securities or property) subject to
outstanding Awards, and (iii) the grant or exercise price with respect to any
Award or, if deemed appropriate, make provision for a cash payment to the holder
of an outstanding Award; provided, in each case, that with respect to Awards of
Incentive Stock Options and Awards intended to qualify as performance based
compensation under Section 162(m)(4)(C) of the Code, no such adjustment shall be
authorized to the extent that such authority would cause the Plan to violate
Section 422(b)(1) of the Code or would cause such Award to fail to so qualify
under Section 162(m) of the Code, as the case may be, or any successor
provisions thereto; and provided, further, that the number of Shares subject to
any Award denominated in Shares shall always be a whole number.
 
  (d) Substitute Awards
 
     Any Shares underlying Substitute Awards shall not, except in the case of
Shares with respect to which Substitute Awards are granted with respect to
Incentive Stock Options or, if not permissible under Rule 16b-3, to Employees
who are officers or directors of the Company for purposes of Section 16 of the
Exchange Act or any successor section thereto, be counted against the Shares
available for Awards other than Incentive Stock Options under the Plan.
 
SECTION 5. ELIGIBILITY
 
     Other than Awards granted to non-employee Directors pursuant to Section
6(h) of the Plan, any Employee who is not a member of the Committee, including
any officer or employee-director of the Company or any Affiliate, shall be
eligible to be designated a Participant. All Employees shall be eligible for
Awards under the Plan. However, no Employee under this Plan may receive in any
calendar year Stock Options and/or Rights that, in the aggregate, are with
respect to more than 500,000 Shares (tandem Awards shall be deemed to be one
Award for this purpose).
 
SECTION 6. AWARDS
 
  (a) Options
 
     Subject to the provisions of the Plan, the Committee shall have authority
to determine the Employees to whom Options shall be granted, the number of
Shares to be covered by each Option, the purchase price therefor and the
conditions and limitations applicable to the exercise of the option including
the following terms and conditions and such additional terms and conditions, as
the Committee shall determine are not inconsistent with the provisions of the
Plan.
 
          (i) Exercise Price. The purchase price per Share purchasable under an
     Option shall be determined by the Committee at the time each Option is
     granted; provided, however, that the purchase price per Share shall not be
     less than 100% of the Fair Market Value on the date of grant, except in the
     case of Options that are Substitute Awards.
 
          (ii) Time and Method of Exercise. The Committee shall determine the
     time or times at which an Option may be exercised in whole or in part, and
     the method or methods by which, and the form or forms (which may include,
     without limitation, cash, Shares, outstanding Awards, Shares that would
     otherwise be acquired upon exercise of the Option, other securities or
     other property, or any combination thereof,
 
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     having a Fair Market Value on the exercise date equal to the relevant
     exercise price) in which payment of the exercise price with respect thereto
     may be made or deemed to have been made. Pursuant to Section 7(b) of the
     Plan, the Committee may, at its discretion, accelerate the time at which
     Options may be exercised and otherwise modify the time or methods of
     exercise of the Options.
 
          (iii) Incentive Stock Options. The terms of any Incentive Stock Option
     granted under the Plan shall comply in all respects with the provisions of
     Section 422 of the Code, or any successor provision, and any regulations
     promulgated thereunder. Incentive Stock Options may be granted only to
     Employees of the Company and its "subsidiaries" within the meaning of
     Section 424(f) of the Code.
 
  (b) Stock Appreciation Rights
 
     Subject to the provisions of the Plan, the Committee shall have authority
to determine the Employees to whom Stock Appreciation Rights shall be granted,
the number of Shares to be covered by each Stock Appreciation Right Award, the
grant price thereof and the conditions and limitations applicable to the
exercise thereof. A Stock Appreciation Right may be granted in tandem with
another Award, in addition to another Award, or freestanding and unrelated to
another Award. A Stock Appreciation Right granted in tandem with or in addition
to another Award may be granted either at the same time as such other Award or
at a later time.
 
          (i) Grant Price. The grant price of a Stock Appreciation Right shall
     be determined by the Committee; provided, however, that the grant price
     shall not be less than 100% of the Fair Market Value on the date of grant
     or on the date of original grant of any related Award.
 
          (ii) Other Terms and Conditions. Subject to the terms of the Plan and
     any applicable Award Agreement, the Committee shall determine, at or after
     the grant of a Stock Appreciation Right, the term, methods of exercise,
     methods of settlement, and any other terms and conditions of any Stock
     Appreciation Right. Any such determination by the Committee may be changed
     by the Committee from time to time and may govern the exercise of Stock
     Appreciation Rights granted or exercised prior to such determination as
     well as Stock Appreciation Rights granted or exercised thereafter. The
     Committee may impose such conditions or restrictions on the exercise of any
     Stock Appreciation Right as it shall deem appropriate.
 
  (c) Restricted Stock
 
     Subject to the provisions of the Plan, the Committee shall have authority
to determine the Employees to whom Restricted Stock shall be granted, the number
of Shares of Restricted Stock to be granted to each such Participant, the
duration of the Restricted Period during which, and the conditions under which,
the Restricted Stock may be forfeited to the Company, and the other terms and
conditions of such Awards.
 
          (i) Dividends. Unless otherwise determined by the Committee,
     Restricted Stock Awards shall provide for the payment of dividends during
     the Restricted Period. Any Restricted Stock Award may require that any or
     all dividends or other distributions paid on the Restricted Stock during
     the Restricted Period be automatically sequestered and held in a
     bookkeeping cash account (with or without interest) or reinvested on an
     immediate or deferred basis in additional shares of Common Stock, which
     credit or shares may be subject to the same restrictions as the underlying
     Award or such other restrictions as the Committee may determine. Dividends
     paid on Restricted Stock may be paid directly to the Participant, may be
     subject to risk of forfeiture and/or transfer restrictions during any
     period established by the Committee, all as determined by the Committee in
     its discretion.
 
          (ii) Registration. Any Restricted Stock may be evidenced in such
     manner as the Committee shall deem appropriate, including, without
     limitation, book-entry registration or issuance of a stock certificate or
     certificates. In the event any stock certificate is issued in respect of
     Restricted Stock granted under the Plan, such certificate shall be
     registered in the name of the Participant and shall bear an appropriate
     legend referring to the terms, conditions, and restrictions applicable to
     such Restricted Stock.
 
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          (iii) Forfeiture and Restrictions Lapse. Except as otherwise
     determined by the Committee or the terms of the Award that granted the
     Restricted Stock, upon termination of a Participant's employment (as
     determined under criteria established by the Committee, including, without
     limitation, in the Committee's discretion, goals described under Section
     6(d)(i)) for any reason during the applicable Restricted Period, all
     Restricted Stock shall be forfeited by the Participant and re-acquired by
     the Company. The Committee may, when it finds that a waiver would be in the
     best interests of the Company and not cause such Award, if it is intended
     to qualify as performance based compensation under Section 162(m) of the
     Code, to fail to so qualify under Section 162(m) of the Code, waive in
     whole or in part any or all remaining restrictions with respect to such
     Participant's Restricted Stock. Unrestricted Shares, evidenced in such
     manner as the Committee shall deem appropriate, shall be issued to the
     holder of Restricted Stock promptly after the applicable restrictions have
     lapsed or otherwise been satisfied.
 
          (iv) Transfer Restrictions. During the Restricted Period, Restricted
     Stock will be subject to the limitations on transfer as provided in Section
     6(i)(iii).
 
  (d) Performance Awards
 
     The Committee shall have authority to determine the Employees who shall
receive a Performance Award, which shall (A) consist of a right, denominated or
payable in cash, Shares, Deferred Shares, other securities or other property
(including, without limitation, Restricted Stock, or any combination thereof),
and (B) confer on the holder thereof rights valued as determined by the
Committee and payable to, or exercisable by, such holder, in whole or in part,
upon the achievement of such performance goals during such performance periods
as the Committee shall establish.
 
          (i) Terms and Conditions. Subject to the terms of the Plan and any
     applicable Award Agreement, the Committee shall determine the performance
     goals to be achieved during any performance period, the length of any
     performance period, the amount of any Performance Award and the amount of
     any payment or transfer to be made pursuant to any Performance Award.
     Without limiting the generality of the foregoing, it is intended that the
     Committee may establish performance goals applicable to Performance Awards
     granted to Participants who, in the judgment of the Committee, may be
     Covered Employees in such a manner as shall permit payments with respect
     thereto to qualify as "performance-based compensation" as described in
     Section 162(m)(4)(C) of the Code. It is specifically provided that the
     material terms of such performance goals for Participants who, in the
     judgment of the Committee, may be Covered Employees, shall, until changed
     by the Committee with the approval of the stockholders, if such stockholder
     approval is required by the Code, be as follows: (x) the business criteria
     on which the performance goals shall be based shall be the attainment of
     such target levels of either net income, cash flows, reserve additions or
     revisions, total capitalization, total shareholder return, assets,
     exploration successes, production volumes, finding and development costs,
     costs reductions and savings, reportable incidents in safety or
     environmental matters, return on sales, profit margin, earnings per share
     or personal objectives tied to operational studies, implementing policies
     and plans, negotiating transactions and sales, developing long-term
     business goals, managerial responsibilities and assessments as may be
     specified by the Committee; and (y) the maximum amount of compensation that
     may be paid to any one Participant with respect to any one year shall be
     $1.5 million under an annual performance bonus Award and $1.5 million under
     a long-term Award with a performance period longer than one fiscal year.
 
          (ii) Payment of Performance Awards. Performance Awards may be paid in
     a lump sum or in installments following the close of the performance period
     or, in accordance with procedures established by the Committee, on a
     deferred basis.
 
  (e) Stock Compensation and Bonus Shares
 
     (i) Stock Compensation. The Committee shall have the authority, in its
discretion, to pay in Shares all, or such portion as it shall determine, of
amounts payable (x) under any Award of the Plan, other than Performance Awards
payable in cash as a short term annual incentive or Cash Awards granted in
tandem with Restricted Stock or (y) if requested by an Employee, under any
compensation program of the Company. The
 
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number and type of Shares to be distributed in lieu of the cash compensation to
which an Employee would otherwise be entitled, as well as the terms and
conditions of any such bonus awards, shall be determined by the Committee.
 
     (ii) Bonus Shares. The Committee may also grant Bonus Shares to eligible
Employees. Each Bonus Share shall constitute a transfer of Common Shares to the
Participant, without other payment therefor, as additional compensation for the
Participant's services to the Company.
 
  (f) Deferred Shares
 
     The Committee may also grant Awards of Deferred Shares to eligible
Employees upon such terms and conditions as the Committee may determine.
 
          (i) Terms and Conditions. Each Deferred Share award shall constitute
     an agreement by the Company to issue or transfer a specified number of
     Shares to the Participant in the future, subject to the fulfillment during
     the Restricted Period of such conditions, including performance objectives
     or, as described in Section 6(d)(i), performance goals, if any, as the
     Committee may specify at the date of grant. During the Restricted Period,
     the Participant shall not have any right to transfer any rights under the
     subject Award, shall not have any rights of ownership in the Deferred
     Shares and shall not have any right to vote such shares.
 
          (ii) Dividends. Any Deferred Share award may provide that any or all
     dividends or other distributions paid on Shares during the Restricted
     Period be credited in a cash bookkeeping account (without interest) or that
     equivalent additional Deferred Shares be awarded, which account or shares
     may be subject to the same restrictions as the underlying Award or such
     other restrictions as the Committee may determine.
 
  (g) Other Stock-Based and Cash Awards
 
     (i) Other Stock Based Awards. The Committee is hereby authorized to grant
to eligible Employees an "Other Stock-Based Award," which shall consist of a
right (i) which is not an Award or right described in Section 6(a), (b), (c),
(d), (e) or (f) above and (ii) which is denominated or payable in, valued in
whole or in part by reference to, or otherwise based on or related to, Shares
(including, without limitation, securities convertible into Shares) as are
deemed by the Committee to be consistent with the purposes of the Plan;
provided, that any such rights must comply, to the extent deemed desirable by
the Committee, with Rule 16b-3 and applicable law. Subject to the terms of the
Plan and any applicable Award Agreement, the Committee shall determine the terms
and conditions of any such Other Stock-Based Award.
 
     (ii) Cash Awards. Subject to the provisions of the Plan, the Committee
shall have authority to determine the Employees to whom Cash Awards shall be
granted, the amount, and the terms or conditions, if any, as additional
compensation for the Employee's services to the Company or its Affiliates. A
Cash Award may be granted (simultaneously or subsequently) in tandem with
another Award and may entitle a Participant to receive a specified amount of
cash from the Company upon such other Award becoming taxable to the Participant,
which cash amount may be based on a formula relating to the anticipated taxable
income associated with such other Award and the payment of the Cash Award or
other terms determined by the Committee.
 
  (h) Awards to Non-employee Directors
 
     (i) Initial Granting of Options. Subject to stockholder approval of the
Plan pursuant to Section 10, and to the limitation of the number of shares of
Stock set forth in Section 4(a), each non-employee Director who serves in such
capacity on the date of the approval of the Plan by the Board (the "Current
non-employee Directors") shall receive, as of such date and without the exercise
of the discretion of any person or persons, a Non-Qualified Stock Option
exercisable for 5,000 shares of Stock. Subject to stockholder approval of the
Plan pursuant to Section 10, and to the limitation of the number of shares of
Stock set forth in Section 4(a), each non-employee Director who is elected or
appointed to the Board for the first time after the effective date of the
 
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Plan (excluding the Current non-employee Directors) shall receive, as of the
date of his or her election or appointment and without the exercise of the
discretion of any person or persons, a Non-Qualified Stock Option exercisable
for 5,000 shares of Stock (subject to adjustment in the same manner as provided
in Section 7 hereof with respect to shares of Stock subject to Options then
outstanding). Any nominee non-employee Director may make an irrevocable election
in advance of election not to receive an option pursuant to this Section
6(h)(i).
 
     (ii) Annual Granting of Options. Subject to stockholder approval of the
Plan pursuant to Section 10, and to the limitation of the number of shares of
Stock set forth in Section 4(a), as of the date of the annual meeting of the
stockholders of the Company in each year that the Plan is in effect as provided
in Section 11 hereof (commencing with the 1995 annual meeting of stockholders),
each non-employee Director who is in office immediately after such meeting and
who is not then entitled to receive an Option pursuant to the preceding
provisions of this Section 6(h) shall receive, without the exercise of the
discretion of any person or persons, a Non-Qualified Stock Option exercisable
for 3,000 shares of Stock (subject to adjustment in the same manner as provided
in Section 7 hereof with respect to shares of Stock subject to Options then
outstanding). Any non-employee Director may make an irrevocable election in
advance not to receive an option pursuant to this Section 6(h)(ii).
 
     (iii) Other Terms and Conditions. The following provisions are applicable
to Options granted pursuant to Sections 6(h)(i) and (ii):
 
          A. Options shall be exercisable on the day following the date of
     grant.
 
          B. The purchase price of a Share covered under an Option granted under
     this Section 6(h) shall be the Fair Market Value of a Share on the date of
     grant.
 
          C. The Option may be exercised in full at one time or in part from
     time to time by giving written notice, signed by the optionee exercising
     the Option, to the Company, stating the number of Shares with respect to
     which the Option is being exercised, accompanied by payment in full for
     such Shares, which payment may be in whole or in part in Shares of the
     Company already owned by said optionee, valued at Fair Market Value;
     provided, however, that (i) no Option shall be exercisable after ten (10)
     years from the date on which it was granted, and (ii) there shall be no
     such exercise at any one time for fewer than one hundred (100) Shares or
     for all of the remaining Shares then purchasable by the optionee exercising
     the Option, if fewer than one hundred (100) Shares.
 
          D. Each Option shall expire ten (10) years from the date of grant
     thereof, but shall be subject to earlier termination as follows. Options,
     to the extent exercisable as of the date a non-employee Director optionee
     ceases to serve as a director of the Company, must be exercised within six
     months of such date unless such event results from death, Disability or
     Retirement, in which case Options may be exercised by the optionee, the
     optionee's legal representative, heir or devisee, as the case may be,
     within two (2) years from the date of death or Disability and within three
     (3) years from the date of Retirement; provided, however, that no such
     event shall extend the normal expiration date of such Options.
 
          E. Upon exercise of the Option, subject to paragraph F below, delivery
     of a certificate for fully paid and nonassessable Shares shall be made
     either at the corporate office of the Company in Houston, Texas to the
     optionee exercising the Option at such time during ordinary business hours
     after fifteen (15) days but not more than thirty (30) days from the date of
     receipt of the notice by the Company as shall be designated in such notice,
     or at such time, place and manner as may be agreed upon by the Company and
     the optionee exercising the Option.
 
          F. Until the earlier to occur of the following events (i) the
     non-employee Director no longer serves as a Director of the Company for any
     reason, (ii) a Change in Control, (iii) the approval by the Company's
     stockholders of a merger or consolidation or (iv) a tender offer for the
     Common Stock of the Company ("Termination of Restriction"), the Shares
     received by the non-employee Director upon the exercise of an Option
     granted pursuant to Section 6(h)(i) and (ii) shall not be subject to
     disposition by the non-employee Director, by sale, transfer, alienation,
     anticipation, pledge, encumbrance, assignment or any other means whether
     such disposition be voluntary or involuntary or by operation of law by
     judgment,
 
                                      8
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     levy, attachment, garnishment or any other legal or equitable proceeds
     (including bankruptcy), and any attempted disposition thereof, shall be
     null and void and of no effect; provided, however, that nothing in this
     Section 6(h)(iii)F shall prevent transfer by will, the applicable laws of
     descent and distribution or pursuant to a qualified domestic relations
     order. The certificates evidencing the Shares may bear a legend restricting
     or incorporating the restrictions, and the Company may cause the
     certificates to be delivered upon issuance to the Secretary of the Company
     or such other depositary as may be designated by the Company as a
     depositary for safe-keeping until Termination of Restriction. Upon
     Termination of Restriction, the Company will cause a new certificate or
     certificates to be issued without legend in the name of such former
     director.
 
     (iv) Notwithstanding anything in the Plan to the contrary, a non-employee
Director shall be ineligible to receive a grant provided for in Section 6(h) if
as of the date of such grant the Director (i) is an employee of the Company or
any Affiliate or (ii) has been an employee of the Company or any Affiliate for
any part of the calendar year preceding the calendar year in which such a grant
is to be made.
 
     (v) In the event that the number of Shares available for grants under the
Plan is insufficient to make all grants provided for in this Section 6(h) hereby
made on the applicable date, then all non-employee Directors who are entitled to
a grant on such date shall share ratably in the number of Shares then available
for grant under the Plan, and shall have no right to receive a grant with
respect to the deficiencies in the number of available Shares and the grants
under this Section 6(h) shall terminate.
 
     (vi) Except as expressly provided in this Section 6(h) grants made pursuant
to this Section 6(h) shall be subject to the terms and conditions of the Plan;
however, if there is a conflict between the terms and conditions of the Plan and
this Section 6(h) then the terms and conditions of this Section 6(h) shall
control. The Committee may not exercise any discretion with respect to this
Section 6(h) which would be inconsistent with the intent expressed in Section
6(h)(vii).
 
     (vii) It is intended that the Plan meet the requirements of Rule 16b-3 and
that any non-employee Director who is eligible to receive a grant or to whom a
grant is made pursuant to this Section 6 will not for such reason cease to be a
"disinterested person" within the meaning of Rule 16b-3 with respect to the Plan
and other stock related plans of the Company.
 
     (viii) All Options under this Section 6(h) shall be evidenced by Award
Agreements.
 
  (i) General
 
     (i) Awards May Be Granted Separately or Together. Awards may, in the
discretion of the Committee, be granted either alone or in addition to, in
tandem with, or in substitution for any other Award granted under the Plan or
any award granted under any other plan of the Company or any Affiliate. Awards
granted in addition to or in tandem with other Awards or awards granted under
any other plan of the Company or any Affiliate may be granted either at the same
time as or at a different time from the grant of such other Awards or awards.
 
     (ii) Forms of Payment by Company Under Awards. Subject to the terms of the
Plan and of any applicable Award Agreement, payments or transfers to be made by
the Company or an Affiliate upon the grant, exercise or payment of an Award may
be made in such form or forms as the Committee shall determine, including,
without limitation, cash, Shares, other securities, other Awards or other
property, or any combination thereof, and may be made in a single payment or
transfer, in installments, or on a deferred basis, in each case in accordance
with rules and procedures established by the Committee. Such rules and
procedures may include, without limitation, provisions for the payment or
crediting of reasonable interest on installment or deferred payments.
 
     (iii) Limits on Transfer of Awards
 
          (A) Each Award, and each right under any Award, shall be exercisable
     only by the Participant during the Participant's lifetime, or, if
     permissible under applicable law, by the Participant's guardian or
 

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     legal representative or by a transferee receiving such Award pursuant to a
     qualified domestic relations order (a "QDRO") as determined by the
     Committee.
 
          (B) No Award and no right under any such Award may be assigned,
     alienated, pledged, attached, sold or otherwise transferred or encumbered
     by a Participant otherwise than by will or by the laws of descent and
     distribution (or, in the case of Restricted Stock, to the Company) or
     pursuant to a QDRO and any such purported assignment, alienation, pledge,
     attachment, sale, transfer or encumbrance shall be void and unenforceable
     against the Company or any Affiliate.
 
          (C) To the extent approved by the Committee and in compliance with
     Rule 16b-3 and the Securities Act of 1933, as amended, a Non-Qualified
     Stock Option may be transferred to immediate family members.
 
     (iv) Term of Awards. The term of each Award (other than pursuant to Section
6(h)) shall be for such period as may be determined by the Committee; provided,
that in no event shall the term of any Incentive Stock Option Award exceed a
period of ten years from the date of its grant.
 
     (v) Share Certificates. All certificates for Shares or other securities of
the Company or any Affiliate delivered under the Plan pursuant to any Award or
the exercise thereof shall be subject to such stop transfer orders and other
restrictions as the Committee may deem advisable under the Plan or the rules,
regulations, and other requirements of the SEC, any stock exchange upon which
such Shares or other securities are then listed, and any applicable Federal or
state laws, and the Committee may cause a legend or legends to be put on any
such certificates to make appropriate reference to such restrictions.
 
     (vi) Consideration for Grants. Awards may be granted for no cash
consideration or for such consideration as the Committee determines including,
without limitation, such minimal cash consideration as may be required by
applicable law.
 
     (vii) Delivery of Shares or other Securities and Payment by Participant of
Consideration. No Shares or other securities shall be delivered pursuant to any
Award until payment in full of any amount required to be paid pursuant to the
Plan or the applicable Award Agreement is received by the Company. Such payment
may be made by such method or methods and in such form or forms as the Committee
shall determine, including, without limitation, cash, Shares, other securities,
other Awards or other property, withholding of Shares, cashless exercise with
simultaneous sale, or any combination thereof; provided, that the combined
value, as determined by the Committee, of all cash and cash equivalents and the
Fair Market Value of any such Shares or other property so tendered to the
Company, as of the date of such tender, is at least equal to the full amount
required to be paid pursuant to the Plan or the applicable Award Agreement to
the Company.
 
SECTION 7. AMENDMENT AND TERMINATION
 
     Except to the extent prohibited by applicable law and unless otherwise
expressly provided in an Award Agreement or in the Plan:
 
  (a) Amendments to the Plan
 
     The Board may amend, alter, suspend, discontinue, or terminate the Plan
without the consent of any shareholder, Participant, other holder or beneficiary
of an Award, or other Person; provided, however, that the provisions of Section
6(h) may not be amended more than once every six months other than to comport
with changes in the Code, the Employee Retirement Income Security Act of 1974,
as amended, or the rules thereunder and; provided, further, that notwithstanding
any other provision of the Plan or any Award Agreement, without the approval of
the stockholders of the Company no such amendment, alteration, suspension,
discontinuation, or termination shall be made that would:
 
          (i) increase the total number of Shares available for Awards under the
     Plan, except as provided in Section 4(c) of the Plan;
 
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          (ii) permit Incentive Stock Options to be granted with per Share
     grant, exercise or purchase prices of less than the Fair Market Value of a
     Share on the date of grant thereof; or
 
          (iii) result in this Plan no longer satisfying the requirements of
     Rule 16b-3.
 
  (b) Amendments to Awards
 
     The Committee may waive any conditions or rights under, amend any terms of,
or alter any Award theretofore granted (other than Awards granted pursuant to
Section 6(h)), provided no change in any Award, other than pursuant to Section
7(c), shall reduce the benefit to Participant without the consent of such
Participant. Notwithstanding the foregoing, with respect to any Award intended
to qualify as performance-based compensation under Section 162(m) of the Code,
no adjustment shall be authorized to the extent such adjustment would cause the
Award to fail to so qualify.
 
  (c) Adjustment of Awards Upon the Occurrence of Certain Unusual or
Nonrecurring Events
 
     The Committee is hereby authorized to make adjustments in the terms and
conditions of, and the criteria included in, Awards in recognition of unusual or
nonrecurring events (including, without limitation, the events described in
Section 4(c) of the Plan) affecting the Company, any Affiliate, or the financial
statements of the Company or any Affiliate, or of changes in applicable laws,
regulations, or accounting principles, whenever the Committee determines that
such adjustments are appropriate in order to prevent dilution or enlargement of
the benefits or potential benefits intended to be made available under the Plan.
Notwithstanding the foregoing, with respect to any Award intended to qualify as
performance-based compensation under Section 162(m) of the Code, no adjustment
shall be authorized to the extent such adjustment would cause the Award to fail
to so qualify.
 
SECTION 8. CHANGE IN CONTROL
 
     (a) In addition to the Committee's authority set forth in Section 7(c) of
the Plan, in order to maintain the Participants' rights in the event of any
Change in Control, as hereinafter defined, the Committee, as constituted before
such Change in Control, is hereby authorized and directed to provide for the
acceleration of any time periods relating to the exercise or realization of all
Awards so that such Award may be exercised or realized in full, and has sole
discretion, as to any Award, either at the time such Award is made hereunder or
any time thereafter, to take any one or more of the following actions: (i)
provide for the purchase of any such Award, either automatically or upon the
Participant's request, for an amount of cash equal to the amount that could have
been attained upon the exercise of such Award or realization of the
Participant's rights had such Award been currently exercisable or payable; (ii)
make such adjustment to any such Award then outstanding as the Committee deems
appropriate to reflect such Change in Control; or (iii) if equitable and in the
best interests of the Company and its stockholders, cause (x) any such Award
then outstanding to be assumed, or new rights substituted therefor, by the
acquiring or surviving corporation after such Change in Control or (y) the
exercise period for any such Award then outstanding to terminate on a fixed date
following such Change in Control provided the Participant receives written
notice of such event and the fixed date at least twenty days prior to the
effective date of such Change in Control. The Committee may, in its discretion,
include such further provisions and limitations in any Award Agreement as it may
deem equitable and in the best interests of the Company and its stockholders.
 
     (b) A "Change in Control" shall be deemed to occur (i) if any person or
persons or entity or entities (other than Petroleum Associates, L.P., KKR
Partners II, L.P. and any entity controlling, controlled by or under common
control with any such entities, separately or in the aggregate ("KKR")) acquires
75% or more of the assets of the Company or a successor of the Company or such
successor's parent corporation (based upon the then current fair market value
thereof) or 50% or more of the Company's then outstanding voting stock or a
successor's or such successor's parent corporation's then outstanding voting
securities, and, if there shall be more than one class of voting securities
thereof, then of the combined voting power held by all classes of voting
securities of the Company, a successor corporation or its parent corporation
(whether such acquisition of stock or assets occurs pursuant to a single
transaction or several related transactions or series of

 
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transactions), (ii) upon the approval by the Company's stockholders of a plan of
liquidation or dissolution of the Company or a successor of the Company or such
successor's parent corporation, or (iii) upon the approval by the Company's
stockholders of a merger or consolidation and such transaction was determined to
be a Change in Control, which transaction and determination was approved by a
majority of the Company's Board of Directors in actions taken prior to, and with
respect to such transaction.
 
SECTION 9. GENERAL PROVISIONS
 
  (a) No Rights to Awards
 
     No Employee, Participant or other Person shall have any claim to be granted
any Award, and there is no obligation for uniformity of treatment of Employees,
Participants, or holders or beneficiaries of Awards. The terms and conditions of
Awards need not be the same with respect to each recipient.
 
  (b) Delegation
 
     Subject to the terms of the Plan and applicable law, the Committee may
delegate to one or more officers or managers of the Company or any Affiliate, or
to a committee of such officers or managers, the authority, subject to such
terms and limitations as the Committee shall determine, to grant Awards to, or
to cancel, modify or waive rights with respect to, or to alter, discontinue,
suspend, or terminate Awards held by, Employees who are not officers or
directors of the Company for purposes of Section 16 of the Exchange Act, or any
successor Section thereto, or who are otherwise not subject to such Section.
 
  (c) Withholding
 
     The Company or any Affiliate is hereby authorized to withhold from any
Award, from any payment due or transfer made under any Award or under the Plan
or from any compensation or other amount owing to a Participant the amount (in
cash, Shares, other securities, Shares that would otherwise be issued pursuant
to such Award (including automatic withholding), other Awards or other property)
of any applicable taxes payable in respect of an Award, its exercise, the lapse
of restrictions thereon, or any payment or transfer under an Award or under the
Plan and to take such other action as may be necessary in the opinion of the
Company to satisfy all obligations for the payment of such taxes.
 
  (d) No Limit on Other Compensation Arrangements
 
     Nothing contained in the Plan shall prevent the Company or any Affiliate
from adopting or continuing in effect other compensation arrangements (subject
to shareholder approval of such other arrangement, if such approval is
required), and such arrangements may be either generally applicable or
applicable only in specific cases.
 
  (e) No Right to Employment
 
     The grant of an Award shall not be construed as giving a Participant the
right to be retained in the employ of the Company or any Affiliate. Further, the
Company or an Affiliate may at any time dismiss a Participant from employment,
free from any liability or any claim under the Plan, unless otherwise expressly
provided in the Plan or in any Award Agreement.
 
  (f) Governing Law
 
     The validity, construction, and effect of the Plan and any rules and
regulations relating to the Plan shall be determined in accordance with the laws
of the State of Delaware and applicable Federal law.
 
  (g) Severability
 
     If any provision of the Plan or any Award is or becomes or is deemed to be
invalid, illegal, or unenforceable in any jurisdiction or as to any Person or
Award, or would disqualify the Plan or any Award under any law deemed applicable
by the Committee, such provision shall be construed or deemed amended to
 
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conform to the applicable laws, or if it cannot be construed or deemed amended
without, in the determination of the Committee, materially altering the intent
of the Plan or the Award, such provision shall be stricken as to such
jurisdiction, Person or Award and the remainder of the Plan and any such Award
shall remain in full force and effect.
 
  (h) Other Laws
 
     The Committee may refuse to issue or transfer any Shares or other
consideration under an Award if, acting in its sole discretion, it determines
that the issuance of transfer or such Shares or such other consideration might
violate any applicable law or regulation or entitle the Company to recover the
same under Section 16(b) of the Exchange Act, and any payment tendered to the
Company by a Participant, other holder or beneficiary in connection with the
exercise of such Award shall be promptly refunded to the relevant Participant,
holder or beneficiary. It is intended that the Plan and any grant of an Award
made to a person subject to Section 16 of the Exchange Act meet all of the
requirements of Rule 16b-3. If any provision of the Plan or any such Award would
disqualify the Plan or such Award under, or would otherwise not comply with,
Rule 16b-3, such provision or Award shall be construed or deemed amended to
conform to Rule 16b-3.
 
  (i) No Trust or Fund Created
 
     Neither the Plan nor any Award shall create or be construed to create a
trust or separate fund of any kind or a fiduciary relationship between the
Company or any Affiliate and a Participant or any other Person. To the extent
that any Person acquires a right to receive payments from the Company or any
Affiliate pursuant to an Award, such right shall be no greater than the right of
any unsecured general creditor of the Company or any Affiliate.
 
  (j) No Fractional Shares
 
     No fractional Shares shall be issued or delivered pursuant to the Plan or
any Award, and the Committee shall determine whether cash, other securities, or
other property shall be paid or transferred in lieu of any fractional Shares or
whether such fractional Shares or any rights thereto shall be cancelled,
terminated, or otherwise eliminated.
 
  (k) Headings
 
     Headings are given to the Sections and subsections of the Plan solely as a
convenience to facilitate reference. Such headings shall not be deemed in any
way material or relevant to the construction or interpretation of the Plan or
any provision thereof.
 
SECTION 10. EFFECTIVE DATE OF THE PLAN
 
     The Plan shall be effective as of November 28, 1994, provided the Plan is
subsequently approved by the stockholders of the Company within 12 months
thereafter.
 
SECTION 11. TERM OF THE PLAN
 
     No Award shall be granted under the Plan after November 27, 2004. However,
unless otherwise expressly provided in the Plan or in an applicable Award
Agreement, any Award theretofore granted may, and the authority of the Board or
the Committee to amend, alter, adjust, suspend, discontinue, or terminate any
such Award or to waive any conditions or rights under any such Award shall,
extend beyond such date.
 
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