SOUTHERN MINERAL CORP
8-K, 1997-11-19
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1
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                     SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549

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


                                  FORM 8-K

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



     Date of Report (Date of earliest event reported) November 17, 1997


                        SOUTHERN MINERAL CORPORATION
           (Exact Name of Registrant as Specified in its Charter)



                NEVADA                       0-8043           36-2068676
       (State or Other Jurisdiction       (Commission      (I.R.S. Employer
             of Incorporation)            File Number)    Identification No.)


          500 Dallas, Suite 2800
              Houston, Texas                                   77002-4708
  (Address of Principal Executive Offices)                     (Zip Code)




      Registrant's telephone number, including area code: (713) 658-9444

- --------------------------------------------------------------------------------
<PAGE>   2
ITEM 5.  OTHER EVENTS.

         On November 17, 1997, Southern Mineral Corporation ("SMC") and Amerac
Energy Corporation ("Amerac") issued a press release announcing that they had
entered into a definitive agreement for the merger of Amerac with a subsidiary
of SMC. Such press release and such agreement are filed herewith.

ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS

(a)      Financial Statements of Acquired Business.  Not applicable.

(b)      Pro Forma Financial Information.  Not applicable.

(c)      Exhibits.

2.1      Agreement and Plan of Merger, dated as of November 17, 1997, by and
         among SMC, AEC Acquisition Corp. and Amerac.

99.1     Press Release, dated November 17, 1997, announcing the signing of the
         Agreement and Plan of Merger among SMC and Amerac.





<PAGE>   3
                                   SIGNATURES

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


                                    SOUTHERN MINERAL CORPORATION



Date: November 18, 1997             By: /S/ JAMES H. PRICE             
                                       ---------------------------------------
                                            James H. Price
                                        Vice President, Finance





<PAGE>   4
                              INDEX TO EXHIBITS


EXHIBIT
NUMBER
- -------


2.1      Agreement and Plan of Merger, dated as of November 17, 1997, by and
         among SMC, AEC Acquisition Corp. and Amerac.

99.1     Press Release, dated November 17, 1997, announcing the signing of the
         Agreement and Plan of Merger among SMC and Amerac.






<PAGE>   1

                                                                     EXHIBIT 2.1

                        AGREEMENT AND PLAN OF MERGER


                                by and among


                        SOUTHERN MINERAL CORPORATION,



                            AEC ACQUISITION CORP.


                                     and


                          AMERAC ENERGY CORPORATION


                              November 17, 1997
<PAGE>   2
                              TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                Page
                                                                                ----
<S>                                                                              <C>
ARTICLE I     THE MERGER......................................................    2
       1.1    The Merger......................................................    2
       1.2    Effective Time..................................................    2
       1.3    Effects of the Merger...........................................    2
       1.4    Certificate of Incorporation and By-laws........................    2
       1.5    Directors and Officers..........................................    2
       1.6    Additional Actions..............................................    2

ARTICLE II    CONVERSION OF SECURITIES........................................    3
       2.1    Conversion of Capital Stock.....................................    3
       2.2    Exchange Ratio, Fractional Shares...............................    3
       2.3    Exchange of Certificates........................................    4
              (a)    Exchange Agent...........................................    4
              (b)    Exchange Procedures......................................    4
              (c)    Distributions with Respect to Unexchanged Shares.........    5
              (d)    No Further Ownership Rights in Company Common Stock......    5
              (e)    Termination of Exchange Fund.............................    5
              (f)    No Liability.............................................    6
              (g)    Investment of Exchange Fund..............................    6
       2.4    Treatment of Stock Options and Warrants.........................    6

ARTICLE III   REPRESENTATIONS AND WARRANTIES OF PARENT AND SUB................    7
       3.1    Organization and Standing.......................................    7
       3.2    Subsidiaries....................................................    8
       3.3    Corporate Power and Authority...................................    8
       3.4    Capitalization of Parent........................................    9
       3.5    Conflicts, Consents and Approvals...............................    9
       3.6    Absence of Certain Changes......................................   10
       3.7    Parent SEC Documents............................................   10
       3.8    Taxes...........................................................   11
       3.9    Compliance with Law.............................................   12
       3.10   Registration Statement..........................................   12
       3.11   Litigation......................................................   12
       3.12   Brokerage and Finder's Fees.....................................   13
       3.13   Tax-Free Reorganization.........................................   13
       3.14   Contracts.......................................................   13
       3.15   Labor Relations.................................................   13
</TABLE>

                                       i
<PAGE>   3
<TABLE>
<S>                                                                              <C>
       3.16   Permits.........................................................   13
       3.17   Environmental Matters...........................................   14
       3.18   Company Stock Ownership.........................................   14
       
ARTICLE IV    REPRESENTATIONS AND WARRANTIES OF THE COMPANY...................   15
       4.1    Organization and Standing.......................................   15
       4.2    Subsidiaries....................................................   15
       4.3    Corporate Power and Authority...................................   15
       4.4    Capitalization of the Company and its Subsidiaries..............   16
       4.5    Conflicts; Consents and Approvals...............................   16
       4.6    Absence of Certain Changes......................................   17
       4.7    Company SEC Documents...........................................   17
       4.8    Taxes...........................................................   18
       4.9    Compliance with Law.............................................   19
       4.10   Registration Statement..........................................   19
       4.11   Litigation......................................................   19
       4.12   Brokerage and Finder's Fees.....................................   19
       4.13   Opinion of Financial Advisor....................................   20
       4.14   Tax-Free Reorganization.........................................   20
       4.15   Employee Benefit Plans..........................................   20
       4.16   Contracts.......................................................   22
       4.17   Labor Relations.................................................   22
       4.18   Permits.........................................................   22
       4.19   Environmental Matters...........................................   23
       4.20   Parent Stock Ownership..........................................   23
       4.21   DGCL Section 203 and State Takeover Laws........................   23

ARTICLE V     COVENANTS OF THE PARTIES........................................   23
       5.1    Mutual Covenants................................................   24
              (a)    General..................................................   24
              (b)    Governmental Matters.....................................   24
              (c)    Tax-Free Treatment.......................................   24
              (d)    Public Announcements.....................................   24
              (e)    Access...................................................   24
              (f)    Stockholders Meetings....................................   25
              (g)    Preparation of Proxy Statement and 
                       Registration Statement.................................   25
              (h)    Notification of Certain Matters..........................   25
              (i)    Pooling of Interests.....................................   25
       5.2    Covenants of Parent.............................................   26
              (a)    Conduct of Parent's Operations...........................   26
              (b)    Indemnification; Insurance...............................   27
              (c)    Listing Application......................................   28
</TABLE>


                                      ii
<PAGE>   4
<TABLE>
<S>                                                                              <C>
               (d)    Directors of Parent.....................................   28
        5.3    Covenants of the Company.......................................   28
               (a)    Conduct of the Company's and the 
                        Subsidiaries' Operations..............................   28
               (b)    No Solicitation.........................................   30
               (c)    Directors, Officers and Employees.......................   31
               (d)    Agreements of Affiliates................................   31

ARTICLE VI     CONDITIONS.....................................................   32
        6.1    Mutual Conditions..............................................   32
        6.2    Conditions to Obligations of the Company.......................   33
        6.3    Conditions to Obligations of Parent and Sub....................   33

ARTICLE VII    TERMINATION AND AMENDMENT......................................   34
        7.1    Termination....................................................   34
        7.2    Effect of Termination..........................................   35
        7.3    Amendment......................................................   38
        7.4    Extension; Waiver..............................................   38

ARTICLE VIII   MISCELLANEOUS..................................................   38
        8.1    Survival of Representations and Warranties.....................   38
        8.2    Notices........................................................   38
        8.3    Interpretation.................................................   39
        8.4    Counterparts...................................................   39
        8.5    Entire Agreement...............................................   39
        8.6    Third Party Beneficiaries......................................   40
        8.7    Governing Law..................................................   40
        8.8    Specific Performance...........................................   40
        8.9    Assignment.....................................................   40
        8.10   Expenses.......................................................   40
        8.11   Incorporation of Disclosure Schedules..........................   40
        8.12   Severability...................................................   40
        8.13   Subsidiaries and Affiliates....................................   40
</TABLE>

                                      iii
<PAGE>   5
                        AGREEMENT AND PLAN OF MERGER


         This Agreement and Plan of Merger ("this Agreement") is made and
entered into as of the 17th day of November, 1997, by and among Southern
Mineral Corporation, a Nevada corporation ("Parent"), AEC Acquisition Corp., a
Delaware corporation and a wholly owned subsidiary of Parent ("Sub"), and
Amerac Energy Corporation, a Delaware corporation (the "Company").


                           PRELIMINARY STATEMENTS

         A.      Parent desires to combine its business and operations with the
business and operations of the Company through the merger (the "Merger") of Sub
with and into the Company, with the Company as the surviving corporation,
pursuant to which each share of Company Common Stock (as defined in Section
4.4) outstanding at the Effective Time (as defined in Section 1.2) will be
converted into the right to receive shares of Parent Common Stock (as defined
in Section 3.4) as more fully provided herein.

         B.      The Company desires to combine its business and operations
with the business and operations of Parent and to become a wholly owned
subsidiary of Parent and for the holders of shares of Company Common Stock
("Company Stockholders") to have a continuing equity interest in the combined
businesses of Parent and the Company.

         C.      The parties intend that the Merger constitute a tax-free
"reorganization" within the meaning of Section 368(a) of the Internal Revenue
Code of 1986, as amended (the "Code").

         D.      The parties intend that the Merger be accounted for under the
purchase method of accounting.

         E.      The respective Boards of Directors of Parent, Sub and the
Company have determined that the Merger in the manner contemplated herein is
fair to and in the best interests of their respective stockholders and, by duly
adopted resolutions, have approved and adopted this Agreement.

                                  AGREEMENT

                 Now, therefore, in consideration of these premises and the
mutual and dependent promises hereinafter set forth, the parties hereto agree
as follows:

                                      1
<PAGE>   6
                                  ARTICLE I

                                 THE MERGER

                 1.1 The Merger.  Upon the terms and subject to the conditions
hereof, and in accordance with the provisions of the Delaware General
Corporation Law (the "DGCL"), Sub shall be merged with and into the Company as
soon as practicable following the satisfaction or waiver of the conditions set
forth in Article VI, but in no event later than two business days thereafter
(the date of such merger being referred to herein as the "Closing Date").
Following the Merger, the separate corporate existence of Sub shall cease and
the Company shall continue its existence under the laws of the State of
Delaware.  The Company, in its capacity as the corporation surviving the
Merger, is hereinafter sometimes referred to as the "Surviving Corporation".

                 1.2  Effective Time.  The Merger shall be consummated by
filing with the Secretary of State of the State of Delaware (the "Delaware
Secretary of State") a certificate of merger (the "Certificate of Merger") in
such form as is required by and executed in accordance with the DGCL.  The
Merger shall become effective (the "Effective Time") when the Certificate of
Merger has been filed with the Delaware Secretary of State or at such later
time as may be agreed by Parent and the Company and specified in the
Certificate of Merger.  Prior to the filing referred to in this Section 1.2, a
closing (the "Closing") shall be held at the offices of Akin, Gump, Strauss,
Hauer & Feld, L.L.P. at 711 Louisiana, Suite 1900, Houston, Texas 77002, or
such other place as the parties may agree.

                 1.3  Effects of the Merger.  The Merger shall have the effects
set forth in the DGCL.

                 1.4  Certificate of Incorporation and By-laws.  The
Certificate of Incorporation of Sub, as in effect immediately prior to the
Effective Time, shall be the initial Certificate of Incorporation of the
Surviving Corporation.  The By-laws of Sub, as in effect immediately prior to
the Effective Time, shall be the initial By-laws of the Surviving Corporation.

                 1.5  Directors and Officers.  From and after the Effective
Time, the officers and the directors of Sub shall be the officers and the
directors of the Surviving Corporation, in each case until their respective
successors are duly elected and qualified.

                 1.6  Additional Actions.  If, at any time after the Effective
Time, the Surviving Corporation shall consider or be advised that any further
deeds, assignments or assurances in law or any other acts are necessary or
desirable to carry out the provisions of this Agreement, the proper officers
and directors of Parent and the Company shall take all such necessary action.

                                      2
<PAGE>   7
                                  ARTICLE II

                           CONVERSION OF SECURITIES

                 2.1  Conversion of Capital Stock.  At the Effective Time, by
virtue of the Merger and without any action on the part of Parent, Sub or the
Company:

                  (a)     Each share of common stock of Sub issued and
outstanding immediately prior to the Effective Time shall be converted into one
share of common stock of the Surviving Corporation.  Such shares shall
thereafter constitute all of the issued and outstanding capital stock of the
Surviving Corporation.

                  (b)     For purposes of this Agreement, "Aggregate
Consideration" shall mean that number of shares (rounded to the nearest whole
share) of common stock, $.01 par value per share, of Parent ("Parent Common
Stock") determined by dividing (i) $22,500,000.00 (the "Purchase Price") by
(ii) the average closing sale price of a share of Parent Common Stock as quoted
on the Nasdaq Stock Market ("Nasdaq") for the twenty consecutive trading days
which precede the third trading day which is immediately prior to the Closing,
as reported (absent manifest error in the printing thereof) by The Wall Street
Journal (the "Average Closing Sale Price"); provided, however, that if the
Aggregate Consideration as calculated pursuant to the foregoing would be (X)
less than 2,727,272 shares of Parent Common Stock, then the Aggregate
Consideration shall be deemed to be 2,727,272 shares of Parent Common Stock or
(Y) more than 3,333,333 shares of Parent Common Stock, then the Aggregate
Consideration shall be deemed to be 3,333,333 shares of Parent Common Stock.
Each share of Company Common Stock (other than shares to be canceled in
accordance with Section 2.1(c)) issued and outstanding immediately prior to the
Effective Time shall be converted into the right to receive that number of
shares of Parent Common Stock calculated by dividing the Aggregate
Consideration by the total number of shares of Company Common Stock issued and
outstanding immediately prior to the Effective Time (the "Exchange Ratio").

                  (c)     Each share of capital stock of the Company held in 
the treasury of the Company or held by Parent or any of its subsidiaries shall
be canceled and retired and no payment shall be made in respect thereof.

                 2.2  Exchange Ratio, Fractional Shares.  No certificates for
fractional shares of Parent Common Stock shall be issued as a result of the
conversion provided for in Section 2.1(b).  To the extent that an outstanding
share of Company Common Stock would otherwise have become a fractional share of
Parent Common Stock, the holder thereof, upon presentation of such fractional
interest represented by an appropriate certificate for Company Common Stock to
the Exchange Agent pursuant to Section 2.3, shall be entitled to receive a cash
payment therefor in an amount equal to the value (determined with reference to
the last reported sales price of Parent Common Stock on Nasdaq on the last full
trading day immediately prior to the Effective Time) of such fractional
interest.  Such payment with respect to fractional shares is merely

                                      3
<PAGE>   8
intended to provide a mechanical rounding off of, and is not a separately
bargained for, consideration.  If more than one certificate representing shares
of Company Common Stock shall be surrendered for the account of the same
holder, the number of shares of Parent Common Stock for which certificates have
been surrendered shall be computed on the basis of the aggregate number of
shares represented by the certificates so surrendered.  In the event that prior
to the Effective Time Parent or the Company shall declare a stock dividend or
other distribution payable in shares of its common stock or securities
convertible into shares of its common stock, or effect a stock split,
reclassification, combination or other change with respect to its common stock,
the Exchange Ratio shall be adjusted to reflect such dividend, distribution,
stock split, reclassification, combination or other change.

                 2.3  Exchange of Certificates.

                  (a)     Exchange Agent.  As of the Effective Time, Parent 
shall make available to an exchange agent designated by Parent and reasonably
acceptable to the Company (the "Exchange Agent"), for the benefit of Company
Stockholders, for exchange in accordance with this Section 2.3, certificates
representing shares of Parent Common Stock issuable pursuant to Section 2.1 in
exchange for outstanding shares of Company Common Stock and shall from time to
time deposit cash in an amount reasonably expected to be paid pursuant to
Section 2.2 (such shares of Parent Common Stock and cash, together with any
dividends or distributions with respect thereto, being hereinafter referred to
as the "Exchange Fund").

                  (b)     Exchange Procedures.  Promptly after the Effective 
Time, Parent shall cause the Exchange Agent to mail to each holder of record of
a certificate or certificates (the "Certificates") which immediately prior to
the Effective Time represented outstanding shares of Company Common Stock whose
shares were converted into the right to receive shares of Parent Common Stock
pursuant to Section 2.1(b) hereof (i) a letter of transmittal (which shall
specify that delivery shall be effected, and risk of loss and title to the
Certificates shall pass, only upon delivery of the Certificates to the Exchange
Agent and shall be in such form and have such other provisions as Parent may
reasonably specify) and (ii) instructions for effecting the surrender of the
Certificates in exchange for certificates representing shares of Parent Common
Stock.  Upon surrender of a Certificate for cancellation to the Exchange Agent,
together with a duly executed letter of transmittal, the holder of such
Certificate shall be entitled to receive in exchange therefor (x) a certificate
representing that number of shares of Parent Common Stock which such holder has
the right to receive pursuant to Section 2.1 and (y) a check representing the
amount of cash in lieu of fractional shares, if any, and unpaid dividends and
distributions, if any, which such holder has the right to receive pursuant to
the provisions of this Article II, after giving effect to any required
withholding tax, and the shares represented by the Certificate so surrendered
shall forthwith be canceled.  No interest will be paid or accrued on the cash in
lieu of fractional shares, if any, and unpaid dividends and distributions, if
any, payable to holders of shares of Company Common Stock. In the event of a
transfer of ownership of shares of Company Common Stock which is not registered
on the transfer records of the Company, a certificate representing the proper
number of shares of Parent Common Stock, together with a

                                      4
<PAGE>   9
check for the cash to be paid in lieu of fractional shares, if any, and unpaid
dividends and distributions, if any, may be issued to such transferee if the
Certificate representing such shares of Company Common Stock held by such
transferee is presented to the Exchange Agent, accompanied by all documents
required to evidence and effect such transfer and to evidence that any
applicable stock transfer taxes have been paid.  Until surrendered as
contemplated by this Section 2.3, each Certificate shall be deemed at any time
after the Effective Time to represent only the right to receive upon surrender
a certificate representing shares of Parent Common Stock and cash in lieu of
fractional shares, if any, and unpaid dividends and distributions, if any, as
provided in this Article II.

                  (c)     Distributions with Respect to Unexchanged Shares.  
Notwithstanding any other provisions of this Agreement, no dividends or other
distributions declared or made after the Effective Time with respect to shares
of Parent Common Stock having a record date after the Effective Time shall be
paid to the holder of any unsurrendered Certificate, and no cash payment in lieu
of fractional shares shall be paid to any such holder, until the holder shall
surrender such Certificate as provided in this Section 2.3. Subject to the
effect of Applicable Law (as defined in Section 3.9), following surrender of any
such Certificate, there shall be paid to the holder of the certificates
representing whole shares of Parent Common Stock issued in exchange therefor,
without interest, (i) at the time of such surrender, the amount of dividends or
other distributions with a record date after the Effective Time theretofore
payable with respect to such whole shares of Parent Common Stock and not paid,
less the amount of any withholding taxes which may be required thereon, and (ii)
at the appropriate payment date subsequent to surrender, the amount of dividends
or other distributions with a record date after the Effective Time but prior to
surrender and a payment date subsequent to surrender payable with respect to
such whole shares of Parent Common Stock, less the amount of any withholding
taxes which may be required thereon.

                  (d)     No Further Ownership Rights in Company Common Stock.
All shares of Parent Common Stock issued upon surrender of Certificates in
accordance with the terms hereof (including any cash paid pursuant to this
Article II) shall be deemed to have been issued in full satisfaction of all
rights pertaining to such shares of Company Common Stock represented thereby,
and from and after the Effective Time there shall be no further registration of
transfers on the stock transfer books of the Company of shares of Company Common
Stock.  If, after the Effective Time, Certificates are presented to the
Surviving Corporation for any reason, they shall be canceled and exchanged as
provided in this Section 2.3.

                  (e)     Termination of Exchange Fund.  Any portion of the 
Exchange Fund which remains undistributed to Company Stockholders for six months
after the Effective Time shall be delivered to Parent or the Surviving
Corporation, upon demand thereby, and holders of shares of Company Common Stock
who have not theretofore complied with this Section 2.3 shall thereafter look
only to Parent for payment of any claim to shares of Parent Common Stock, cash
in lieu of fractional shares thereof, or dividends or distributions, if any, in
respect thereof.

                                      5
<PAGE>   10

                  (f)     No Liability.  None of Parent, the Surviving
Corporation or the Exchange Agent shall be liable to any person in respect of
any shares of Company Common Stock (or dividends or distributions with respect
thereto) or cash from the Exchange Fund delivered to a public official pursuant
to any applicable abandoned property, escheat or similar law.  If any
Certificates shall not have been surrendered prior to seven years after the
Effective Time of the Merger (or immediately prior to such earlier date on
which any cash, any cash in lieu of fractional shares or any dividends or
distributions with respect to whole shares of Company Common Stock in respect
of such Certificate would otherwise escheat to or become the property of any
Governmental Authority (as defined in Section 3.5)), any such cash, dividends
or distributions in respect of such Certificate shall, to the extent permitted
by Applicable Law, become the property of Parent, free and clear of all claims
or interest of any person previously entitled thereto.

                  (g)     Investment of Exchange Fund.  The Exchange Agent 
shall invest any cash included in the Exchange Fund, as directed by Parent, on a
daily basis.  Any interest and other income resulting from such investments
shall be paid to Parent.  In the event the Exchange Fund shall realize a loss on
any such investment, Parent shall promptly thereafter deposit, or cause to be
deposited, in such Exchange Fund on behalf of the Surviving Corporation cash in
an amount equal to such loss.

                 2.4  Treatment of Stock Options and Warrants.

                  (a)     Prior to the Effective Time, Parent and the Company 
shall take all such actions as may be necessary to cause each unexpired and
unexercised option or right to purchase shares of Company Common Stock granted
(or subject to being granted on a contingent basis) under the Company's various
stock option plans in effect on the date hereof to current or former directors,
officers, employees, consultants or independent contractors of the Company
(each, a "Company Option") to cease to represent the right to purchase Company
Common Stock and to be adjusted at the Effective Time to represent the right (an
"Adjusted Option") to purchase that number of shares of Parent Common Stock
equal to the number of shares of Company Common Stock issuable immediately prior
to the Effective Time upon exercise of the Company Option (without regard to
actual restrictions on exercisability) multiplied by the Exchange Ratio, with an
exercise price equal to the exercise price which existed under the corresponding
Company Option divided by the Exchange Ratio, and with other terms and
conditions that are the same as the terms and conditions of such Company Option
immediately before the Effective Time.  In connection with the issuance of
Adjusted Options, Parent shall (i) reserve for issuance the number of shares of
Parent Common Stock that will become subject to Adjusted Options pursuant to
this Section 2.4 and (ii) from and after the Effective Time, upon exercise of
Adjusted Options, make available for issuance all shares of Parent Common Stock
covered thereby, subject to the terms and conditions applicable thereto.

                  (b)     Parent agrees to file with the Securities and 
Exchange Commission (the "Commission") as soon as reasonably practicable after
the Closing Date a registration statement

                                      6
<PAGE>   11
on Form S-8 or other appropriate form under the Securities Act of 1933, as
amended (together with the rules and regulations thereunder, the "Securities
Act"), to register shares of Parent Common Stock issuable upon exercise of the
Adjusted Options and use its reasonable efforts to cause such registration
statement to remain effective until the exercise or expiration of such options.

                  (c)     Prior to the Effective Time, Parent and the Company 
shall take all such actions as may be necessary to cause each unexpired and
unexercised warrant to purchase shares of Company Common Stock granted (or
subject to being granted on a contingent basis) under the Company's various
warrant agreements in effect on the date hereof (each, a "Company Warrant") to
cease to represent the right to purchase Company Common Stock and to be adjusted
at the Effective Time to represent the right (an "Adjusted Warrant") to purchase
that number of shares of Parent Common Stock equal to the number of shares of
Company Common Stock issuable immediately prior to the Effective Time upon
exercise of the Company Warrant (without regard to actual restrictions on
exercisability) multiplied by the Exchange Ratio, with an exercise price equal
to the exercise price which existed under the corresponding Company Warrant
divided by the Exchange Ratio, and with other terms and conditions that are the
same as the terms and conditions of such Company Warrant immediately before the
Effective Time.  In connection with the issuance of Adjusted Warrants, Parent
shall (i) reserve for issuance the number of shares of Parent Common Stock that
will become subject to Adjusted Warrants pursuant to this Section 2.4; (ii) from
and after the Effective Time, upon exercise of Adjusted Warrants, make available
for issuance all shares of Parent Common Stock covered thereby, subject to the
terms and conditions applicable thereto; (iii) comply, and cause the Surviving
Corporation to comply, with the terms and conditions set forth in the Company
Warrants; and (iv) deliver to the holders of Adjusted Warrants such shares of
Parent Common Stock that such holders are entitled to purchase upon the exercise
of Adjusted Warrants.  To the extent required by the respective Company
Warrants, prior to the Effective Time, Parent shall deliver its undertaking to
assume, as of the Effective Time, the obligation to deliver to the holders of
warrants under such Company Warrants the shares of Parent Common Stock that such
holders are entitled to purchase upon the exercise of Adjusted Warrants by
written instrument executed and delivered to each Warrant Agent, as such term is
defined in the respective Company Warrants.


                                 ARTICLE III

               REPRESENTATIONS AND WARRANTIES OF PARENT AND SUB

                 In order to induce the Company to enter into this Agreement,
Parent and Sub hereby make the following representations and warranties to the
Company:

                 3.1  Organization and Standing.  Each of Parent and its
subsidiaries is a corporation duly organized, validly existing and in good
standing under the laws of its state of incorporation with

                                      7
<PAGE>   12
full power and authority to own, lease, use and operate its properties and to
conduct its business as and where now owned, leased, used, operated and
conducted.  Each of Parent and its subsidiaries is duly qualified to do
business and in good standing in each jurisdiction in which the nature of the
business conducted by it or the property it owns, leases or operates makes such
qualification necessary, except where the failure to be so qualified or in good
standing in such jurisdiction would not have a material adverse effect on
Parent.

                 3.2  Subsidiaries.  As of the date hereof, other than
immaterial interests, Parent does not own, directly or indirectly, any equity
or other ownership interest in any corporation, partnership, joint venture or
other entity or enterprise, except as set forth in Section 3.2 to the
disclosure schedule (the "Parent Disclosure Schedule") delivered by Parent to
the Company and dated the date hereof.  Except as set forth in Section 3.2 to
the Parent Disclosure Schedule, each of the outstanding shares of capital stock
of each of Parent's subsidiaries is duly authorized, validly issued, fully paid
and nonassessable, and is owned, directly or indirectly, by Parent free and
clear of all liens, pledges, security interests, claims or other encumbrances,
other than the pledge of such shares under Parent's credit agreement with
Compass Bank and liens imposed by law which could not reasonably be expected to
have, in the aggregate, a material adverse effect on Parent.  All of the
outstanding shares of the capital stock of Sub will be directly owned by
Parent.  Other than as set forth in Section 3.2 to the Parent Disclosure
Schedule, there are no outstanding shares of capital stock or subscriptions,
options, warrants, puts, calls, agreements, understandings, claims or other
commitments or rights of any type relating to the issuance, sale or transfer of
any securities of any subsidiary of Parent, nor are there outstanding any
securities which are convertible into or exchangeable for any shares of capital
stock of any subsidiary of Parent; and no subsidiary of Parent has any
obligation of any kind to issue any additional securities or to pay for
securities of any subsidiary of Parent or any predecessor thereof.  As used in
this Section 3.2, "capital stock" shall include capital stock or other
ownership interests having by their terms ordinary voting power to elect
directors or others performing similar functions with respect to such entity.

                 3.3  Corporate Power and Authority.

                  (a)      Parent has full corporate power and authority to
execute and deliver this Agreement and to consummate the transactions
contemplated hereby, subject to the approval of the Share Issuance (as defined
below) by the requisite votes of the stockholders of Parent (the "Parent
Stockholders") in accordance with the rules of Nasdaq and this Agreement.  The
execution and delivery of this Agreement by Parent and the consummation by
Parent of the transactions contemplated hereby have been duly and validly
approved by the Board of Directors of Parent.  The Board of Directors of Parent
has directed that the issuance of Parent Common Stock pursuant hereto (the
"Share Issuance") be submitted to the Parent Stockholders for approval at a
stockholders meeting and, except for the approval of the Share Issuance by the
Parent Stockholders in accordance with the rules of Nasdaq, no other corporate
proceedings on the part of Parent are necessary to approve this Agreement and
to consummate the transactions contemplated hereby.  This Agreement has been
duly and validly executed and delivered by

                                      8
<PAGE>   13
Parent and constitutes a valid and binding obligation of Parent, enforceable
against Parent in accordance with its terms.

                  (b)     At or prior to Closing, Sub will have full corporate
power and authority to execute and deliver this Agreement and to consummate the
transactions contemplated hereby.  The execution and delivery of this Agreement
by Sub and the consummation by Sub of the transactions contemplated hereby will
have been duly and validly approved by the Board of Directors of Sub and by
Parent as the sole stockholder of Sub at or prior to Closing, and no other
corporate proceedings on the part of Sub will be necessary to consummate the
transactions contemplated hereby.  This Agreement will have been duly and
validly executed and delivered by Sub and will constitute a valid and binding
obligation of Sub, enforceable against Sub in accordance with its terms.

                 3.4  Capitalization of Parent.  Parent's authorized capital
stock consists solely of (a) 20,000,000 shares of Parent Common Stock.  As of
October 31, 1997, (i) 9,120,741 shares of Parent Common Stock were issued and
outstanding, (ii) 1,810,000 shares of Parent Common Stock were issuable upon
the exercise of options or warrants and 5,012,107 shares of Parent Common Stock
were issuable upon conversion of convertible securities granted or issuable by
Parent.  Except as set forth on Section 3.4 of the Parent Disclosure Schedule,
since October 31, 1997, Parent has not issued any shares of its capital stock
except upon the exercise of such options, warrants or convertible securities.
Each outstanding share of Parent capital stock is, and all shares of Parent
Common Stock to be issued in connection with the Merger will be, duly
authorized and validly issued, fully paid and nonassessable and free of any
preemptive rights.  As of the date hereof, other than as set forth above, in
the Parent SEC Documents (as defined in Section 3.7) or in Section 3.4 to the
Parent Disclosure Schedule, there are no outstanding shares of capital stock or
subscriptions, options, warrants, puts, calls, agreements, understandings,
claims or other commitments or rights of any type relating to the issuance,
sale or transfer by Parent of any securities of Parent, nor are there
outstanding any securities which are convertible into or exchangeable for any
shares of capital stock of Parent; and Parent has no obligation of any kind to
issue any additional securities or to pay for securities of Parent or any
predecessor.  Parent has no outstanding bonds, debentures, notes or other
similar obligations the holders of which have the right to vote generally with
holders of Parent Common Stock.

                 3.5  Conflicts, Consents and Approvals.  Neither the execution
and delivery of this Agreement by Parent or Sub nor the consummation of the
transactions contemplated hereby will:

                  (a)     conflict with, or violate any provision of the 
         Certificate of Incorporation or By-laws (or any similar organizational
         document) of Parent or any subsidiary of Parent;

                  (b)     violate, or conflict with, or result in a breach of 
         any provision of, or constitute a default (or an event which, with the
         giving of notice, the passage of time or

                                           9
<PAGE>   14
         otherwise, would constitute a default) under, or entitle any party
         (with the giving of notice, the passage of time or otherwise) to
         terminate, accelerate, modify or call a default under, or result in
         the termination, acceleration or cancellation of, or result in the
         creation of any lien, security interest, charge or encumbrance upon
         any of the properties or assets of Parent or any of its subsidiaries
         under any of the terms, conditions or provisions of any note, bond,
         mortgage, indenture, deed of trust, license, contract, undertaking,
         agreement, lease or other instrument or obligation to which Parent or
         any of its subsidiaries is a party or by which any of their respective
         properties or assets may be bound;

                  (c)     violate any order, writ, injunction, decree, statute,
         rule or regulation, applicable to Parent or any of its subsidiaries or
         their respective properties or assets; or

                  (d)     require any action or consent or approval of, or 
         review by, or registration or filing by Parent or any of its
         affiliates with any third party or any court, arbitral tribunal,
         administrative agency or commission or other governmental or
         regulatory body, agency, instrumentality or authority (a "Governmental
         Authority"), other than (i) approval of the Share Issuance by Parent
         Stockholders, (ii) actions required, if any, by the Hart-Scott-Rodino
         Antitrust Improvements act of 1976, as amended (the "HSR Act"), (iii)
         approval of the quotation of the shares of Parent Common Stock to be
         issued in the Merger on NASDAQ, subject to official notice of
         issuance, and (iv) registrations or other actions required under
         federal and state securities laws as are contemplated by this
         Agreement;

except for any of the foregoing that are set forth in subsections (b), (c) or
(d) of Section 3.5 to the Parent Disclosure Schedule or, in the case of (b),
(c) and (d), for any of the foregoing that would neither, in the aggregate,
have a material adverse effect on Parent nor prevent the consummation of the
transactions contemplated hereby.

                 3.6  Absence of Certain Changes.  Except as set forth in the
Parent SEC Documents filed with the Commission as of the date hereof, since
January 1, 1997, (i) each of Parent and its subsidiaries has conducted its
business in the ordinary course, consistent with past practice, (ii) no event,
fact or development has occurred or exists which has or which would reasonably
be expected to have, in the aggregate, a material adverse effect on Parent
(but, excluding for such purposes, events that are generally applicable in the
oil and gas exploration and production industry and the United States, Canada
and Latin America economies), and (iii) neither Parent nor any of its
subsidiaries has taken any action which would be prohibited by Section 5.2(a).

                 3.7  Parent SEC Documents.  Each of Parent and its
subsidiaries has timely filed with the Commission all forms, reports,
schedules, statements, exhibits and other documents required to be filed by it
since January 1, 1995 under the Securities Exchange Act of 1934, as amended
(together with the rules and regulations thereunder, the "Exchange Act"), or
the Securities Act (such documents, as supplemented and amended since the time
of filing, collectively, the

                                          10
<PAGE>   15
 "Parent SEC Documents").  The Parent SEC Documents, including, without
limitation, any financial statements or schedules included therein, at the time
filed (and, in the case of registration statements and proxy statements, on the
dates of effectiveness and the dates of mailing, respectively) (a) did not
contain any untrue statement of a material fact or omit to state a material
fact required to be stated therein or necessary in order to make the statements
therein, in light of the circumstances under which they were made, not
misleading, and (b) complied in all material respects with the applicable
requirements of the Exchange Act and the Securities Act, as the case may be.
The financial statements (including the related notes) of Parent included in
the Parent SEC Documents were prepared in accordance with generally accepted
accounting principles applied on a consistent basis during the periods involved
(except as may be indicated in the notes thereto), and fairly present (subject
in the case of unaudited statements to normal, recurring and year-end audit
adjustments) in all material respects the consolidated financial position of
Parent as of the dates thereof and the consolidated results of its operations
and cash flows for the periods then ended.

                 3.8  Taxes.  Except as set forth in the Parent SEC Documents
or in Section 3.8 to the Parent Disclosure Schedule, (i) each of Parent and its
subsidiaries has duly filed all federal and state income tax returns and all
other material tax returns (including, but not limited to, those filed on a
consolidated, combined or unitary basis) required to have been filed by Parent
or any of its subsidiaries prior to the date hereof and will file, on or before
the Effective Time, all such returns which are required to be filed after the
date hereof and on or before the Effective Time, (ii) all of the foregoing
returns and reports are true and correct in all material respects, and each of
Parent and its subsidiaries has paid or, prior to the Effective Time, will pay
all taxes required to be paid in respect of the periods covered by such returns
or reports to any federal, state, foreign, local or other taxing authority,
(iii) each of Parent and its subsidiaries has paid or made adequate provision
(in accordance with generally accepted accounting principles) in the financial
statements of Parent included in the Parent SEC Documents for all taxes payable
in respect of all periods ending on or prior to September 30, 1997, (iv)
neither Parent nor any of its subsidiaries will have any material liability for
any taxes in excess of the amounts so paid or reserves so established and
neither Parent nor any of its subsidiaries is delinquent in the payment of any
material tax, assessment or governmental charge and none of them has requested
any extension of time within which to file any returns in respect of any fiscal
year which have not since been filed, (v) no deficiencies for any tax,
assessment or governmental charge have been proposed, asserted or assessed in
writing (tentatively or definitely), in each case, by any taxing authority,
against Parent or any of its subsidiaries for which there are not adequate
reserves in its financial statements (in accordance with generally accepted
accounting principles), (vi) as of the date of this Agreement, there are no
extensions or waivers or pending requests for extensions or waivers of the time
to assess or collect any such tax, (vii) since the tax year 1989 and except
with respect to the tax years 1990 and 1993, the federal income tax returns of
Parent have not been audited by the Internal Revenue Service, Department of the
Treasury ("IRS"), and the federal income tax returns of its subsidiaries have
not been audited by the IRS, (viii) neither Parent nor any of its subsidiaries
is or has been a party to any tax sharing agreement with any corporation which
is not currently a member of the affiliated group of

                                          11
<PAGE>   16
which Parent is currently a member, (ix) there are no liens for taxes on any
assets of Parent or any of its subsidiaries (other than statutory liens for
taxes not yet due or liens for which adequate reserves have been established in
its financial statements in accordance with generally accepted accounting
principles), (x) Parent and its subsidiaries have withheld and paid (and until
the Effective Time will withhold and pay) all income, social security,
unemployment, and all other material payroll taxes required to be withheld
(including, without limitation, pursuant to Sections 1441 and 1442 of the Code
or similar provisions under foreign law) and paid in connection with amounts
paid to any employee, independent contractor, stockholder, creditor or other
third party, and (xi) Parent has not filed an election under Section 341(f) of
the Code to be treated as a consenting corporation.  For purposes of this
Agreement, the term "tax" shall include all federal, state, local and foreign
taxes including interest and penalties thereon and additions to tax.  In
addition, the term "tax return" shall mean any return, declaration, statement,
report, schedule, certificate, form information return, or any other document
(including any related or supporting information) required to be supplied to,
or filed with, a taxing authority (foreign or domestic) in connection with
taxes.

                 3.9  Compliance with Law.  Each of Parent and its subsidiaries
is in compliance with, and at all times since January 1, 1995 has been in
compliance with, all applicable laws, statutes, orders, rules, regulations,
policies or guidelines promulgated, or judgments, decisions or orders entered,
by any Governmental Authority (collectively, "Applicable Law") relating to it
or its business or properties, except for any such failures to be in compliance
therewith which, in the aggregate, would not have a material adverse effect on
Parent.

                 3.10  Registration Statement.  None of the information
provided by Parent or any of its subsidiaries for inclusion in the registration
statement on Form S-4 to be filed with the Commission by Parent under the
Securities Act, including the prospectus (as amended, supplemented or modified,
the "Prospectus") relating to shares of Parent Common Stock to be issued in the
Merger and the joint proxy statement and form of proxies relating to the vote
of Company Stockholders with respect to the Merger and the Parent Stockholders
with respect to the Share Issuance (collectively with the Prospectus and as
amended, supplemented or modified, the "Proxy Statement") contained therein
(such registration statement as amended, supplemented or modified, the
"Registration Statement"), at the time the Registration Statement becomes
effective or, in the case of the Proxy Statement, at the date of mailing, will
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
therein, in light of the circumstances under which they are made, not
misleading.  Each of the Registration Statement and Proxy Statement, except for
such portions thereof that relate only to the Company and its subsidiaries,
will comply in all material respects with the provisions of the Securities Act
and the Exchange Act.

                 3.11  Litigation.  Except as set forth in the Parent SEC
Documents, there is no suit, claim, action, proceeding or investigation (an
"Action") pending or, to the knowledge of Parent, threatened against Parent or
any of its subsidiaries which, in the aggregate, could reasonably be expected
to have a material adverse effect on Parent.  Neither Parent nor any of its
subsidiaries

                                          12
<PAGE>   17
is subject to any outstanding order, writ, injunction or decree which, in the
aggregate, could reasonably be expected to have a material adverse effect on
Parent.

                 3.12  Brokerage and Finder's Fees.  Parent has not incurred
and will not incur, directly or indirectly, any brokerage, finder's or similar
fee in connection with the transactions contemplated by this Agreement.  Parent
is not aware of any claim for payment of any finder's fees, brokerage or
agent's commissions or other like payments from Parent in connection with the
negotiation of this Agreement or in connection with the transactions
contemplated hereby.

                 3.13  Tax-Free Reorganization.  To the best knowledge of
Parent, neither Parent nor any of its subsidiaries has taken any action or
failed to take any action which action or failure would prevent the
qualification of the Merger as a reorganization within the meaning of Section
368(a) of the Code.

                 3.14  Contracts.  None of Parent, any of its subsidiaries, or,
to the knowledge of Parent, any other party thereto is in violation of or in
default in respect of, nor has there occurred an event or condition which with
the passage of time or giving of notice (or both) would constitute a default by
Parent under, any contract, agreement, guarantee, lease or executory commitment
(each a "Contract") to which it is a party, except such violations or defaults
under such Contracts which, in the aggregate, would not have a material adverse
effect on Parent.

                 3.15  Labor Relations.  There is no unfair labor practice
complaint against Parent or any of its subsidiaries pending before the National
Labor Relations Board ("NLRB") and there is no labor strike, dispute, slowdown
or stoppage, or any union organizing campaign, actually pending or, to the
knowledge of Parent, threatened against or involving Parent or any of its
subsidiaries, except for any such proceedings which would not have a material
adverse effect on Parent.  Except as disclosed in the Parent SEC Documents,
neither Parent nor any of its subsidiaries is a party to, or bound by, any
collective bargaining agreement, contract or other agreement or understanding
with a labor union or labor organization.  To the knowledge of Parent, there
are no organizational efforts with respect to the formation of a collective
bargaining unit presently being made or threatened involving employees of
Parent or any of its subsidiaries.

                 3.16  Permits.  Each of Parent and its subsidiaries is in
possession of all franchises, grants, authorizations, licenses, permits,
easements, variances, exemptions, consents, certificates, approvals and orders
(collectively, "Permits") necessary to own, lease and operate its properties
and to carry on its business as it is now being conducted, except for any such
Permits the failure of which to possess, in the aggregate, would not reasonably
be expected to have a material adverse effect on Parent.


                                      13
<PAGE>   18

                 3.17  Environmental Matters.

                       (a)     As used herein, the term "Environmental Laws"
means all applicable federal, state, local or foreign laws relating to
pollution or protection of human health or the environment (including, without
limitation, ambient air, surface water, groundwater, land surface or subsurface
strata), including, without limitation, laws relating to emissions, discharges,
releases or threatened releases of chemicals, pollutants, contaminants, or
toxic or hazardous substances or wastes (collectively, "Hazardous Materials")
into the environment, or otherwise relating to the manufacture, processing,
distribution, use, treatment, storage, disposal, transport or handling of
Hazardous Materials, as well as all applicable authorizations, codes, decrees,
demands or demand letters, injunctions, judgments, licenses, notices or notice
letters, orders, permits, plans or regulations issued, entered, promulgated or
approved thereunder to the extent applicable to the specific operations of
Parent or the Company, as applicable.

                       (b)     Except as set forth in the Parent SEC Documents
filed with the Commission as of the date hereof or in Section 3.17(a) of the
Parent Disclosure Schedule, there are, with respect to Parent, its subsidiaries
or any predecessor of the foregoing, no past or present violations of
Environmental Laws, releases of any materials into the environment, actions,
activities, circumstances, conditions, events, incidents, or contractual
obligations which may give rise to any common law environmental liability or any
liability under the Comprehensive Environmental Response, Compensation and
Liability Act of 1980, as amended, or similar federal, state, local or foreign
laws, other than those which, in the aggregate, would not reasonably be expected
to have a material adverse effect on Parent, and none of Parent and its
subsidiaries has received any notice with respect to any of the foregoing, nor
is any Action pending or, to the knowledge of Parent, threatened, in connection
with any of the foregoing that, if adversely determined, could reasonably be
expected to have a material adverse effect on Parent.

                       (c)     Except as set forth in the Parent SEC Documents
filed with the Commission as of the date hereof, no Hazardous Materials are
contained on or about any real property currently owned, leased or used by
Parent or any of its subsidiaries and no Hazardous Materials were released on or
about any real property previously owned, leased or used by Parent or any of its
subsidiaries during the period the property was so owned, leased or used, other
than those which, in the aggregate, would not reasonably be expected to have a
material adverse effect on Parent.

                 3.18  Company Stock Ownership.  Except as set forth in Section
3.18 to the Parent Disclosure Schedule, neither Parent nor any of its
"affiliates" or "associates" "owns" (as each of such terms is defined in
Section 203 of the DGCL) any shares of Company Common Stock or other securities
convertible into Company Common Stock, except to the extent that entering into
this Agreement constitutes "ownership" of Company Common Stock pursuant to the
foregoing.


                                      14
<PAGE>   19
                                  ARTICLE IV

                REPRESENTATIONS AND WARRANTIES OF THE COMPANY

                 In order to induce Parent and Sub to enter into this
Agreement, the Company hereby makes the following representations and
warranties to Parent and Sub:

                 4.1  Organization and Standing.  The Company is a corporation
duly organized, validly existing and in good standing under the laws of the
State of Delaware with full power and authority to own, lease, use and operate
its properties and to conduct its business as and where now owned, leased,
used, operated and conducted.  The Company is duly qualified to do business and
in good standing in each jurisdiction in which the nature of the business
conducted by it or the property it owns, leases or operates makes such
qualification necessary, except where the failure to be so qualified or in good
standing in such jurisdiction would not have a material adverse effect on the
Company.  The copies of the Certificate of Incorporation and By-laws (or
similar organizational documents) of the Company, which have previously been
made available to Parent, are true, complete and correct copies of such
documents as in effect as of the date of this Agreement.

                 4.2  Subsidiaries.  As of the date hereof, other than
immaterial interests, the Company does not own, directly or indirectly, any
equity or other ownership interest in any corporation, partnership, joint
venture or other entity or enterprise, except as set forth in Section 4.2 to
the disclosure schedule (the "Company Disclosure Schedule") delivered by the
Company to Parent and dated the date hereof.  Each of the entities listed on
Section 4.2 to the Company Disclosure  Schedule (individually a "Subsidiary"
and collectively the "Subsidiaries") is a corporation duly organized, validly
existing and in good standing under the laws of the jurisdiction of its
incorporation with full power and authority to own, lease, use and operate its
properties and to conduct its business as and where now owned, leased, used,
operated and conducted.  Each Subsidiary is duly qualified to do business and
in good standing in each jurisdiction in which the nature of the business
conducted by it or the property it owns, leases or operates makes such
qualification necessary, except where the failure to be so qualified or in good
standing in such jurisdiction would not have a material adverse effect on the
Company.  The Company is the sole legal, beneficial and record owner, directly
or indirectly, of all outstanding capital stock of the Subsidiaries, all of
which are owned by the Company free and clear of all liens, claims and
encumbrances.  The Subsidiaries have no assets or liabilities, and are not
parties to any agreements or contracts, other than those which would not have a
material adverse effect on the Company.

                 4.3  Corporate Power and Authority.  The Company has full
corporate power and authority to execute and deliver this Agreement and to
consummate the transactions contemplated hereby, subject to the approval of the
Merger and the adoption and authorization of this Agreement by the stockholders
of the Company in accordance with the DGCL and this Agreement.  The execution
and delivery of this Agreement by the Company and the


                                      15
<PAGE>   20
consummation by the Company of the transactions contemplated hereby have been
duly and validly approved by the Board of Directors of the Company.  The Board
of Directors of the Company has directed that this Agreement and the
transactions contemplated hereby be submitted to the Company Stockholders for
adoption at a stockholders meeting and, except for the adoption of this
Agreement by the affirmative vote of the holders of a majority of shares of
Company Common Stock in accordance with the Applicable Law, no other corporate
proceedings on the part of the Company are necessary to approve this Agreement
and to consummate the transactions contemplated hereby.  This Agreement has
been duly and validly executed and delivered by the Company and constitutes a
valid and binding obligation of the Company, enforceable against the Company in
accordance with its terms.

                 4.4  Capitalization of the Company and its Subsidiaries.  The
Company's authorized capital stock consists solely of (a) 20,000,000 shares of
common stock, $0.05 par value per share ("Company Common Stock"), and (b)
10,000,000 shares of preferred stock, $1.00 par value per share ("Company
Preferred Stock").  As of October 31, 1997, (i) 3,891,981 shares of Company
Common Stock were issued and outstanding, (ii) 201,385 shares of Company Common
Stock were issuable upon the exercise of outstanding options, an additional
230,749 shares of Company Common Stock were issuable upon the exercise of
options that are not currently outstanding but are reserved for issuance upon
the designation of optionees by the Board of Directors of the Company and
154,175 shares of Company Common Stock were issuable upon the exercise or
conversion of outstanding warrants or convertible securities granted or
issuable (on a contingent basis or otherwise) by the Company, and (iii) no
shares of Company Preferred Stock were issued and outstanding.  Since October
31, 1997, except as disclosed in Section 4.4 of the Company Disclosure
Schedule, the Company has not issued any shares of its capital stock except
upon the exercise of such options, warrants or convertible securities.  Each
outstanding share of capital stock of the Company and each Subsidiary is duly
authorized and validly issued, fully paid and nonassessable and free of any
preemptive rights.  As of the date hereof, other than as set forth above, in
the Company SEC Documents (as defined in Section 4.7) or in Section 4.4 to the
Company Disclosure Schedule, there are no outstanding shares of capital stock
or subscriptions, options, warrants, puts, calls, agreements, understandings,
claims or other commitments or rights of any type relating to the issuance,
sale or transfer by the Company or either Subsidiary of any securities of the
Company or either Subsidiary, nor are there outstanding any securities which
are convertible into or exchangeable for any shares of capital stock of the
Company or either Subsidiary; and neither the Company nor either Subsidiary has
any obligation of any kind to issue any additional securities or to pay for
securities of the Company or either Subsidiary or any predecessor.  The Company
has no outstanding bonds, debentures, notes or other similar obligations the
holders of which have the right to vote generally with holders of Company
Common Stock.

                 4.5  Conflicts; Consents and Approvals.  Neither the execution
and delivery of this Agreement by the Company, nor the consummation of the
transactions contemplated hereby will:

                                      16
<PAGE>   21
                  (a)     conflict with, or violate any provision of the 
Certificate of Incorporation or By-laws (or any similar organizational document)
of the Company or either Subsidiary;

                  (b)     violate, or conflict with, or result in a breach of 
any provision of, or constitute a default (or an event which, with the giving of
notice, the passage of time or otherwise, would constitute a default) under, or
entitle any party (with the giving of notice, the passage of time or otherwise)
to terminate, accelerate, modify or call a default under, or result in the
termination, acceleration or cancellation of, or result in the creation of any
lien, security interest, charge or encumbrance upon any of the properties or
assets of the Company or the Subsidiaries under any of the terms, conditions or
provisions of any note, bond, mortgage, indenture, deed of trust, license,
contract, undertaking, agreement, lease or other instrument or obligation to
which the Company or any of the Subsidiaries is a party or by which any of its
properties or assets may be bound;

                  (c)     violate any order, writ, injunction, decree, statute,
rule or regulation applicable to the Company or its Subsidiaries or any of its
properties or assets; or

                  (d)     require any action or consent or approval of, or 
review by, or registration or filing by the Company or its Subsidiaries or any
of its affiliates with any third party or any Governmental Authority, other than
(i) authorization of the Merger and the transactions contemplated hereby by
Company Stockholders, (ii) actions required, if any, by the HSR Act and (iii)
registrations or other actions required under federal and state securities laws
as are contemplated by this Agreement;

except for any of the foregoing that are set forth in subsections (b), (c) or
(d) of Section 4.5 of the Company Disclosure Schedule or, in the case of (b),
(c) and (d), for any of the foregoing that would neither, in the aggregate,
have a material adverse effect on the Company nor prevent the consummation of
the transactions contemplated hereby.

                 4.6  Absence of Certain Changes.  Except as set forth in the
Company SEC Documents filed with the Commission as of the date hereof, since
January 1, 1997, (i) each of the Company and its Subsidiaries has conducted its
business in the ordinary course, consistent with past practice, (ii) no event,
fact or development has occurred or exists which has or which would (A)
reasonably be expected to have, in the aggregate, a material adverse effect on
the Company (but excluding for such purposes events that are generally
applicable in the oil and gas exploration and production industry and the
United States economy) or (B) render materially inaccurate any of the factual
data or assumptions utilized by Ryder Scott in auditing the Company's reserve
report dated July 1997, and (iii) the Company has not taken any action which
would be prohibited by Section 5.3(a).

                 4.7 Company SEC Documents.  The Company has timely filed with
the Commission all forms, reports, schedules, statements, exhibits and other
documents required to be filed by it under the Exchange Act or the Securities
Act (such documents, as supplemented and amended

                                      17
<PAGE>   22
since the time of filing, collectively, the "Company SEC Documents").  The
Company SEC Documents, including, without limitation, any financial statements
or schedules included therein, at the time filed (and, in the case of
registration statements and proxy statements, on the dates of effectiveness and
the dates of mailing, respectively) (a) did not contain any untrue statement of
a material fact or omit to state a material fact required to be stated therein
or necessary in order to make the statements therein, in light of the
circumstances under which they were made, not misleading, and (b) complied in
all material respects with the applicable requirements of the Exchange Act and
the Securities Act, as the case may be.  The financial statements (including
the related notes) of the Company included in the Company SEC Documents were
prepared in accordance with generally accepted accounting principles applied on
a consistent basis during the periods involved (except as may be indicated in
the notes thereto), and fairly present (subject in the case of unaudited
statements to normal, recurring and year-end audit adjustments) in all material
respects the consolidated financial position of the Company as of the dates
thereof and the consolidated results of its operations and cash flows for the
periods then ended.

                 4.8  Taxes.  Except as set forth in the Company SEC Documents
or in Section 4.8 to the Company Disclosure Schedule, (i) the Company and each
Subsidiary has duly filed all federal and state income tax returns and all
other material tax returns (including, but not limited to, those filed on a
consolidated, combined or unitary basis) required to have been filed by it
prior to the date hereof and will file, on or before the Effective Time, all
such returns which are required to be filed after the date hereof and on or
before the Effective Time, (ii) all of the foregoing returns and reports are
true and correct in all material respects, and the Company and each Subsidiary
has paid or, prior to the Effective Time, will pay all taxes required to be
paid in respect of the periods covered by such returns or reports to any
federal, state, foreign, local or other taxing authority, (iii) the Company and
each Subsidiary has paid or made adequate provision (in accordance with
generally accepted accounting principles) in the financial statements of the
Company and its Subsidiaries included in the Company SEC Documents for all
taxes payable in respect of all periods ending on or prior to September 30,
1997, (iv) neither the Company nor either Subsidiary will have any material
liability for any taxes in excess of the amounts so paid or reserves so
established and neither the Company nor either Subsidiary is delinquent in the
payment of any material tax, assessment or governmental charge and has not
requested any extension of time within which to file any returns in respect of
any fiscal year which have not since been filed, (v) no deficiencies for any
tax, assessment or governmental charge have been proposed, asserted or assessed
in writing (tentatively or definitely), in each case, by any taxing authority,
against the Company or either Subsidiary for which there are not adequate
reserves in its financial statements (in accordance with generally accepted
accounting principles), (vi) as of the date of this Agreement, there are no
extensions or waivers or pending requests for extensions or waivers of the time
to assess or collect any such tax, (vii) the federal income tax returns of the
Company and its Subsidiaries have not been audited by the IRS, (viii) neither
the Company nor either Subsidiary is or has been a party to any tax sharing
agreement with any corporation which is not currently a member of the
affiliated group of which the Company or either Subsidiary is currently a
member, (ix) there are no liens for taxes on any

                                      18
<PAGE>   23
assets of the Company or either Subsidiary (other than statutory liens for
taxes not yet due or liens for which adequate reserves have been established in
its financial statements in accordance with generally accepted accounting
principles), (x) the Company and each Subsidiary has withheld and paid (and
until the Effective Time will withhold and pay) all income, social security,
unemployment, and all other material payroll taxes required to be withheld
(including, without limitation, pursuant to Sections 1441 and 1442 of the Code
or similar provisions under foreign law) and paid in connection with amounts
paid to any employee, independent contractor, stockholder, creditor or other
third party, and (xi) neither the Company nor either Subsidiary has filed an
election under Section 341(f) of the Code to be treated as a consenting
corporation.

                 4.9  Compliance with Law.  The Company and each of its
Subsidiaries is in compliance with, and at all times since December 31, 1994
has been in compliance with, all Applicable Law relating to it or its business
or properties, except for any such failures to be in compliance therewith
which, in the aggregate, would not have a material adverse effect on the
Company.

                 4.10  Registration Statement.  None of the information
provided by the Company for inclusion in the Registration Statement at the time
it becomes effective or, in the case of the Proxy Statement, at the date of
mailing, will contain any untrue statement of a material fact or omit to state
any material fact required to be stated therein or necessary in order to make
the statements therein, in light of the circumstances under which they are
made, not misleading.  Each of the Registration Statement and Proxy Statement,
except for such portions thereof that relate only to Parent and its
subsidiaries, will comply in all material respects with the provisions of the
Securities Act and the Exchange Act.

                 4.11  Litigation.  Except as set forth in the Company SEC
Documents, there is no Action pending or, to the knowledge of the Company,
threatened against the Company or its Subsidiaries which, in the aggregate,
could reasonably be expected to have a material adverse effect on the Company.
Neither the Company nor either of the Subsidiaries is subject to any
outstanding order, writ, injunction or decree which, in the aggregate, could
reasonably be expected to have a material adverse effect on the Company.

                 4.12 Brokerage and Finder's Fees.  Except for the Company's
obligation to McDonald & Company Securities, Inc. ("McDonald") and to Peak
Enernomics, Inc. ("Peak") (a copy of the written agreements relating to such
obligations having previously been provided to Parent), neither the Company nor
the Subsidiaries has incurred and will not incur, directly or indirectly, any
brokerage, finder's or similar fee in connection with the transactions
contemplated by this Agreement.  Other than the foregoing obligations to
McDonald and Peak, the Company is not aware of any claim for payment of any
finder's fees, brokerage or agent's commissions or other like payments from the
Company or the Subsidiaries in connection with the negotiation of this
Agreement or in connection with the transactions contemplated hereby.

                                      19
<PAGE>   24
                 4.13 Opinion of Financial Advisor.  The Company has received
the oral opinion of McDonald to the effect that, as of the date hereof, the
Exchange Ratio is fair to the Company Stockholders from a financial point of
view.

                 4.14  Tax-Free Reorganization.  To the best knowledge of the
Company, neither the Company nor the Subsidiaries has taken any action or
failed to take any action which action or failure would prevent the
qualification of the Merger as a reorganization within the meaning of Section
368(a) of the Code.

                 4.15 Employee Benefit Plans.

                      For purposes of this Agreement, the following terms have
the definitions given below:

                 "Controlled Group Liability" means any and all liabilities
under (i) Title IV of ERISA, (ii) section 302 of ERISA, (iii) sections 412 and
4971 of the Code, (iv) the continuation coverage requirements of section 601 et
seq. of ERISA and section 4980B of the Code, and (v) corresponding or similar
provisions of foreign laws or regulations, in each case other than pursuant to
the Parent Plans with respect to Parent, or Company Plans (as defined below)
with respect to the Company and its Subsidiaries.

                 "ERISA" means the Employee Retirement Income Security Act of
1974, as amended, and the regulations thereunder.

                 "ERISA Affiliate" means, with respect to any entity, trade or
business, any other entity, trade or business that is a member of a group
described in Section 414(b), (c), (m) or (o) of the Code or Section 4001(b)(1)
of ERISA that includes the first entity, trade or business, or that is a member
of the same "controlled group" as the first entity, trade or business pursuant
to Section 4001(a)(14) of ERISA.

                 (a)      For purposes of this Agreement, "Company Plans" means
all employee benefit plans, programs, policies, practices, and other
arrangements providing benefits to any employee or former employee or
beneficiary or dependent thereof, whether or not written, and whether covering
one person or more than one person, sponsored or maintained by the Company or
to which the Company contributes or is obligated to contribute.  Without
limiting the generality of the foregoing, the term "Company Plans" includes all
employee welfare benefit plans within the meaning of Section 3(1) of ERISA and
all employee pension benefit plans within the meaning of Section 3(2) of ERISA.

                 (b)      Section 4.15(b) to the Company Disclosure Schedule
lists all Company Plans.  With respect to each Company Plan, the Company has
made available to Parent a true, correct and complete copy of:  (i) each
writing constituting a part of such Company Plan, including, without limitation
all plan documents, benefit schedules, trust agreements, and

                                      20
<PAGE>   25
insurance contracts and other funding vehicles; (ii) the most recent Annual
Report (Form 5500 Series) and accompanying schedule, if any; (iii) the current
summary plan description, if any; (iv) the most recent annual financial report,
if any; and (v) the most recent determination letter from the IRS, if any.

                 (c)      The IRS has issued a favorable determination letter
with respect to each Company Plan that is intended to be a "qualified plan"
within the meaning of Section 401(a) of the Code (a "Qualified Company Plan")
and there are no existing circumstances nor any events that have occurred that
could adversely affect the qualified status of any Qualified Company Plan or
the related trust.

                 (d)      All contributions required to be made to any Company
Plan by Applicable Law or by any plan document or other contractual
undertaking, and all premiums due or payable with respect to insurance policies
funding any Company Plan, for any period through the date hereof have been
timely made or paid in full and through the Closing Date will be timely made or
paid in full or, to the extent not required to be made or paid on or before the
date hereof or the Closing Date, as applicable, have been or will be fully
reflected in the Company's financial statements contained in the Company SEC
Documents.

                 (e)      The Company has complied, and is now in compliance,
in all material respects, with all provisions of ERISA, the Code and all laws
and regulations applicable to the Company Plans.  There is not now, and there
are no existing, circumstances that standing alone could give rise to, any
requirement for the posting of security with respect to a Company Plan or the
imposition of any lien on the assets of the Company or any of its subsidiaries
under ERISA or the Code.

                 (f)      Except as set forth in Section 4.15(f) to the Company
Disclosure Schedule, no Company Plan is subject to Title IV or Section 302 of
ERISA or Section 412 or 4971 of the Code.  No Company Plan is a Multiemployer
Plan (as defined in Section 3.16) or a Multiple Employer Plan (as defined in
Section 3.16), nor has the Company or any of its ERISA Affiliates, at any time
within five years before the date hereof, contributed to or been obligated to
contribute to any Multiemployer Plan or Multiple Employer Plan.

                 (g)      There does not now exist, and there are no existing,
circumstances that could result in any Controlled Group Liability that would be
a liability of the Company following the Closing, other than normal funding
responsibilities.  Without limiting the generality of the foregoing, neither
the Company nor any of its ERISA Affiliates has engaged in any transaction
described in Section 4069 or Section 4204 of ERISA.

                 (h)      Except as set forth in Section 4.15(h) to the Company
Disclosure Schedule and except for health continuation coverage as required by
Section 4980B of the Code or Part 6 of Title I of ERISA, the Company has no
liability for life, health, medical or other welfare benefits to former
employees or beneficiaries or dependents thereof.

                                      21
<PAGE>   26
                 (i)      Except as set forth in Section 4.15(i) to the Company
Disclosure Schedule, neither the execution and delivery of this Agreement nor
the consummation of the transactions contemplated hereby will result in, cause
the accelerated vesting or delivery of, or increase the amount or value of, any
payment or benefit to any employee or director or former employee or former
director of the Company, pursuant to a "change in control" or "change of
control" or otherwise.  Without limiting the generality of the foregoing and
except as set forth in Section 4.15(i) to the Company Disclosure Schedule, no
amount paid or payable by the Company in connection with the transactions
contemplated hereby either solely as a result thereof or as a result of such
transactions in conjunction with any other events will be an "excess parachute
payment" within the meaning of Section 280G of the Code.

                 (j)      There are no pending or threatened claims (other than
claims for benefits in the ordinary course), lawsuits or arbitrations which
have been asserted or instituted against the Company Plans, any fiduciaries
thereof with respect to their duties to the Company Plans or the assets of any
of the trusts under any of the Company Plans which could reasonably be expected
to result in any material liability of the Company to the Pension Benefit
Guaranty Corporation, the Department of Treasury, the Department of Labor or
any Multiemployer Plan.

                 4.16  Contracts.  Except as set forth in Section 4.16 of the
Company Disclosure Schedule, none of the Company or its Subsidiaries or, to the
knowledge of the Company, any other party thereto is in violation of or in
default in respect of, nor has there occurred an event or condition which with
the passage of time or giving of notice (or both) would constitute a default by
the Company or its Subsidiaries under, any Contract to which any of them is a
party, except such violations or defaults under such Contracts which, in the
aggregate, would not have a material adverse effect on the Company.

                 4.17  Labor Relations.  There is no unfair labor practice
complaint against the Company or any Subsidiaries pending before the NLRB and
there is no labor strike, dispute, slowdown or stoppage, or any union
organizing campaign, actually pending or, to the knowledge of the Company,
threatened against or involving the Company or any Subsidiaries, except for any
such proceedings which would not have a material adverse effect on the Company.
Except as disclosed in the Company SEC Documents, neither the Company nor any
Subsidiary is a party to, or bound by, any collective bargaining agreement,
contract or other agreement or understanding with a labor union or labor
organization.  To the knowledge of the Company, there are no organizational
efforts with respect to the formation of a collective bargaining unit presently
being made or threatened involving employees of the Company or any Subsidiary.

                 4.18 Permits.  The Company and each Subsidiary is in
possession of all Permits necessary to own, lease and operate its properties
and to carry on its business as it is now being conducted, except for any such
Permits the failure of which to possess, in the aggregate, would not reasonably
be expected to have a material adverse effect on the Company.

                                      22
<PAGE>   27

                 4.19  Environmental Matters.

                 (a)      Except as set forth in the Company SEC Documents
filed with the Commission as of the date hereof or in Section 4.19(a) of the
Company Disclosure Schedule, there are, with respect to the Company, each
Subsidiary or any predecessor thereof, no past or present violations of
Environmental Laws, releases of any materials into the environment, actions,
activities, circumstances, conditions, events, incidents, or contractual
obligations which may give rise to any common law environmental liability or
any liability under the Comprehensive Environmental Response, Compensation and
Liability Act of 1980, as amended, or similar federal, state, local or foreign
laws, other than those which, in the aggregate, would not reasonably be
expected to have a material adverse effect on the Company, and the Company has
not received any notice with respect to any of the foregoing, nor is any Action
pending or threatened in connection with any of the foregoing that, if
adversely determined, could reasonably be expected to have a material adverse
effect on the Company.

                 (b)      Except as set forth in Section 4.19(b) to the Company
Disclosure Schedule or set forth in the Company SEC Documents filed with the
Commission as of the date hereof, no Hazardous Materials are contained on or
about any real property currently owned, leased or used by the Company and no
Hazardous Materials were released on or about any real property previously
owned, leased or used by the Company or either Subsidiary during the period the
property was so owned, leased or used, other than those which, in the
aggregate, would not reasonably be expected to have a material adverse effect
on the Company.

                 4.20  Parent Stock Ownership.  Except as set forth in Section
4.20 to the Company Disclosure Schedule, neither the Company nor any of its
"affiliates" or "associates" "owns" (as each of such terms is defined in
Section 203 of the DGCL) any shares of Parent Common Stock or other securities
convertible into Parent Common Stock.

                 4.21 DGCL Section 203 and State Takeover Laws.  Assuming the
accuracy of the representations and warranties set forth in Section 3.18, prior
to the date hereof, the Board of Directors of the Company has taken all action
necessary to exempt under or make not subject to Section 203 of the DGCL:  (i)
the execution of this Agreement, (ii) the Merger and (iii) the transactions
contemplated hereby.


                                  ARTICLE V

                           COVENANTS OF THE PARTIES

                 The parties hereto agree as follows with respect to the period
from and after the execution of this Agreement.

                                      23
<PAGE>   28
         5.1  Mutual Covenants.

              (a)      General.  Each of the parties shall use its reasonable 
efforts to take all action and to do all things necessary, proper or advisable
to consummate the Merger and the transactions contemplated by this Agreement as
promptly as possible (including, without limitation, using its reasonable
efforts to cause the conditions set forth in Article VI for which they are
responsible to be satisfied as soon as reasonably practicable and to prepare,
execute and deliver such further instruments and take or cause to be taken such
other and further action as any other party hereto shall reasonably request).

              (b)      Governmental Matters.  Each of the parties shall use its
reasonable efforts to take any action that may be necessary, proper or advisable
in connection with any other notices to, filings with, and authorizations,
consents and approvals of any Governmental Authority that it may be required to
give, make or obtain.

              (c)      Tax-Free Treatment.  Each of the parties shall use its 
reasonable efforts to cause the Merger to constitute a tax-free "reorganization"
under Section 368(a) of the Code and to permit Akin, Gump, Strauss, Hauer &
Feld, L.L.P. to issue its opinion provided for in Section 6.1(h).

              (d)      Public Announcements.  At all times prior to the earlier
of the Effective Time or termination of this Agreement pursuant to Section 7.1,
none of Parent, the Company or any of their affiliates shall issue any press
release or make any other public statement or disclosure concerning this
Agreement or the Merger without first obtaining the written consent of Parent if
the disclosure is to be made by the Company or any of its affiliates, or of the
Company if the disclosure is to be made by Parent or any of its affiliates, as
to the contents, the manner of presentation and the publication thereof;
provided, however, that notwithstanding the foregoing, Parent, the Company, or
any of their affiliates may make any disclosure required by applicable law (as
determined after consultation with the disclosing party's outside counsel),
provided that such disclosing party shall use its reasonable best efforts to
first notify the other parties in writing of the proposed disclosure and provide
the other parties with reasonable opportunity to comment on such disclosure.

              (e)      Access.  Subject to Applicable Law, from and after the 
date of this Agreement until the Effective Time (or the termination of this
Agreement), Parent and the Company shall permit representatives of the other to
have reasonable access to the other's officers, employees, premises, properties,
books, records, contracts, tax records and documents.  Information obtained by
Parent and the Company pursuant to this Section 5.1(e) shall be subject to the
provisions of the confidentiality agreements between them dated September 25,
1997 and November 5, 1997 (the "Confidentiality Agreements"), which agreements
remain in full force and effect.

                                      24
<PAGE>   29

              (f)      Stockholders Meetings.  Each of Parent and the Company 
shall duly call, give notice of, convene and hold a meeting of its stockholders
(each a "Stockholders Meeting"), to be held as promptly as practicable following
the date hereof for the purpose of obtaining the requisite stockholder approvals
and adoptions in connection with this Agreement, the Share Issuance and the
Merger, and each shall use reasonable efforts to cause such meetings to occur on
the same date.  Subject to its fiduciary duties under Applicable Law as advised
by counsel, the Board of Directors of each of Parent and the Company will (i)
recommend that its stockholders approve such matters and (ii) use reasonable
efforts to obtain any necessary approvals by its stockholders.

              (g)      Preparation of Proxy Statement and Registration 
Statement.  Each of Parent and the Company shall cooperate to, and shall, as
soon as is reasonably practicable, prepare and file the Proxy Statement with
the Commission on a confidential basis.  Each of Parent and the Company shall
cooperate to prepare and file, and Parent shall prepare and file, the
Registration Statement with the Commission as soon as is reasonably practicable
following clearance of the Proxy Statement by the Commission and each of Parent
and the Company shall cooperate to, and shall, use all reasonable efforts to
have the Registration Statement declared effective by the Commission as
promptly as practicable and to maintain the effectiveness of the Registration
Statement through the Effective Time.  Parent shall advise the Company promptly
after it receives notice of (i) the Registration Statement being declared
effective or any supplement or amendment thereto being filed with the
Commission, (ii) the issuance of any stop order in respect of the Registration
Statement, and (iii) the receipt of any correspondence, comments or requests
from the Commission in respect of the Registration Statement.  If at any time
prior to the Effective Time, any information pertaining to the Company
contained in or omitted from the Registration Statement makes statements
contained in the Registration Statement false or misleading, the Company shall
promptly so inform Parent and provide Parent with the information necessary to
make such statements contained therein not false and misleading.  Each of
Parent and Company shall also cooperate to, and shall, take such other
reasonable actions (other than qualifying to do business in any jurisdiction in
which it is not so qualified) required to be taken under any applicable state
securities laws in connection with the Share Issuance.

              (h)      Notification of Certain Matters.  Each of Parent and the
Company shall give prompt notice to the other party of (i) the occurrence or
nonoccurrence of any event the occurrence or nonoccurrence of which would cause
any representation or warranty contained in this Agreement made by such party to
be untrue or inaccurate at or prior to the Effective Time and (ii) any material
failure of such party to comply with or satisfy any covenant, condition or
agreement to be complied with or satisfied by it hereunder; provided, however,
that the delivery of any notice pursuant to this Section 5.1(i) shall not limit
or otherwise affect the remedies available hereunder to any party.

              (i)      Pooling of Interests.  Notwithstanding anything herein 
to the contrary, Parent and the Company agree to continue to evaluate whether
the Merger can or should be

                                      25
<PAGE>   30
accounted for under the pooling-of-interests method of accounting, and if so,
to amend the relevant provisions of this Agreement so as to comply with
pooling-of-interest requirements.

         5.2  Covenants of Parent.

              (a)      Conduct of Parent's Operations.  During the period from
the date of this Agreement to the Effective Time, Parent shall, and shall cause
its subsidiaries to, conduct its operations in the ordinary course except as
expressly contemplated by this Agreement and the transactions contemplated
hereby and shall use its reasonable efforts to maintain and preserve its
business organization and its material rights and franchises and to retain the
services of its officers and key employees and maintain relationships with
customers, suppliers and other third parties to the end that their goodwill and
ongoing business shall not be impaired in any material respect.  Without
limiting the generality of the foregoing, during the period from the date of
this Agreement to the Effective Time or the earlier termination of this
Agreement pursuant to Section 7.1, Parent shall not, and with respect to clause
(ii) below, Sub shall not, and with respect to clauses (ii) and (iii) below,
Parent shall cause each of its subsidiaries to not, except as otherwise
expressly contemplated by this Agreement and the transactions contemplated
hereby, without the prior written consent of the Company:

                       (i)      make or propose any change in its Certificate 
         of Incorporation, as amended, or By-laws, as amended, or other
         organizational documents, except with respect to those changes
         described on Schedule 5.2A hereto;

                       (ii)     except with respect to the transaction 
         described on Schedule 5.2B hereto, and subject to the limitations of
         clause (iii) below, merge or consolidate with any other person or
         acquire a material amount of assets or capital stock of any other
         person, that would involve, in any case, individually or in the
         aggregate, the issuance of more than 20% of the outstanding Parent
         Common Stock on the date hereof, other than in connection with this
         Agreement and the transactions contemplated hereby;

                       (iii)    except with respect to that transaction 
         described on Schedule 5.2B hereto, conduct its business in a manner or
         take, or, subject to its fiduciary duties under Applicable Law, cause
         to be taken, any other action that would or might reasonably be
         expected to prevent or materially delay Parent or Sub from consummating
         the transactions contemplated by this Agreement (regardless of whether
         such action would otherwise be permitted or not prohibited hereunder),
         including, without limitation, any action that may materially limit or
         delay the ability of Parent or Sub to consummate the transactions
         contemplated by this Agreement as a result of antitrust or securities
         laws or other regulatory concerns; or

                       (iv)     agree to take any action prohibited by the 
         foregoing.

                                          26
<PAGE>   31

                 (b)      Indemnification; Insurance.

                       (i)      From and after the Effective Time, Parent shall,
         and shall cause the Surviving Corporation to, indemnify and hold
         harmless to the fullest extent permitted under Applicable Law each
         person who is now, or has been at any time prior to the date hereof, an
         officer, director, employee, trustee or agent of the Company (or any
         subsidiary or division thereof), including, without limitation, each
         person controlling any of the foregoing persons (individually, an
         "Indemnified Party" and collectively, the "Indemnified Parties"),
         against all losses, claims, damages, liabilities, costs or expenses
         (including attorneys' fees), judgments, fines, penalties and amounts
         paid in settlement in connection with any claim, action, suit,
         proceeding or investigation (and shall pay expenses for legal fees in
         advance of the final disposition of any such action or proceeding to
         each Indemnified Party to the fullest extent permitted under Delaware
         law, provided that the Indemnified Party agrees that, in the event that
         it is ultimately determined that such Indemnified Party is not entitled
         to the payment of such expenses, for any reason, such Indemnified Party
         shall reimburse Parent and the Surviving Corporation for such expenses
         paid in advance) arising out of or pertaining to acts or omissions, or
         alleged acts or omissions, by them in their capacities as such, whether
         commenced, asserted or claimed before the Effective Time and including,
         without limitation, liabilities arising under the Securities Act, the
         Exchange Act and state corporation laws in connection with the Merger;
         provided that the Parent and the Surviving Corporation shall pay for
         only one law firm (in addition to local counsel) for all Indemnified
         Parties, unless the use of one law firm for all Indemnified Parties
         would present such law firm with a conflict of interest.  Parent shall
         cause the Surviving Corporation to keep in effect the Company's current
         provisions in its Certificate of Incorporation and By-laws providing
         for exculpation of director and officer liability and indemnification
         of the Indemnified Parties to the fullest extent permitted under the
         DGCL.  In the event of any actual or threatened claim, action, suit,
         proceeding or investigation in respect of such acts or omissions,
         Parent shall, and shall cause the Surviving Corporation to cooperate in
         the defense of any such matter; provided, however, that the Parent and
         the Surviving Corporation shall not be liable for any settlement
         effected without their written consent (which consent shall not be
         unreasonably withheld).

                       (ii)     From and after the Effective Time, Parent shall,
         or shall cause the Surviving Corporation to, maintain in effect for not
         less than 6 years, the current policies of directors' and officers'
         liability insurance maintained by the Company; provided that Parent may
         substitute therefor policies of at least the same coverage and amounts
         containing terms and conditions that are no less advantageous in any
         material respect to the Indemnified Parties; provided, however, that in
         no event shall the Parent or the Surviving Corporation be required to
         expend pursuant to this Section 5.2(b)(ii) more than the current annual
         premiums paid by the Company for such insurance and, in

                                          27
<PAGE>   32
         the event the cost of such coverage shall exceed that amount, the
         Parent or the Surviving Corporation shall purchase as much coverage as
         possible for such amount.

                 (c)      Listing Application.  Parent shall, as soon as
practicable following the date hereof, prepare and submit to NASDAQ a
subsequent listing application covering the shares of Parent Common Stock
issuable in the Merger, and shall use its reasonable efforts to obtain, prior
to the Effective Time, approval for the listing of such shares of Parent Common
Stock, subject to official notice of issuance.

                 (d)      Directors of Parent.  Immediately after the Effective
Time, Parent will take such action as may be necessary to create one additional
seat on the Board of Directors of Parent and to cause Jeffrey B. Robinson (such
individual being referred to herein as the "New Member") to be elected to the
Board of Directors of Parent, to serve until his successor is duly elected and
qualified.  Parent shall take, or cause to be taken, all action necessary to
nominate the New Member for election to the Board of Directors of Parent at the
1998 Annual Meeting of Parent Stockholders and, in accordance with its normal
solicitation efforts, solicit proxies for his election to such Board of
Directors.

         5.3  Covenants of the Company.

                 (a)      Conduct of the Company's and the Subsidiaries'
Operations.  During the period from the date of this Agreement to the Effective
Time, the Company shall conduct its and its Subsidiaries operations in the
ordinary course except as expressly contemplated by this Agreement and the
transactions contemplated hereby and shall use its reasonable efforts to
maintain and preserve its business organization and its material rights and
franchises and to retain the services of its officers and key employees and
maintain relationships with customers, suppliers and other third parties to the
end that its goodwill and ongoing business shall not be impaired in any
material respect.  Without limiting the generality of the foregoing, during the
period from the date of this Agreement to the Effective Time or the earlier
termination of this Agreement pursuant to Section 7.1, neither the Company nor
the Subsidiaries shall, except as otherwise expressly contemplated by this
Agreement and the transactions contemplated hereby, without the prior written
consent of Parent:

                       (i)           take or effect any of the following actions
         with respect to its securities: (A) adjust, split, combine or
         reclassify its capital stock, (B) make, declare or pay any dividend or
         distribution on, or directly or indirectly redeem, purchase or
         otherwise acquire any of its securities (except in connection with the
         use of shares of capital stock of the Company to pay the exercise
         price or tax withholding in connection with stock-based employee
         benefit plans of the Company), (C) grant any person any right or
         option to acquire any of its securities, (D) issue, deliver or sell or
         agree to issue, deliver or sell any additional securities (except
         pursuant to the exercise of outstanding warrants or options to
         purchase Company Common Stock) or amend the terms of any of its
         securities (provided, however, that the Company may amend any option

                                      28
<PAGE>   33
         agreement(s) to which the Company is a party to provide that the
         optionee(s) under such agreement(s) will have the right to exercise
         any or all of such options, subject to the terms otherwise applicable
         under such agreement(s), for a period of one year following the
         termination of the employment of such optionee by the Company or any
         successor thereto, if, on the date of this Agreement, the optionee is
         an employee of the Company, or the termination of the optionee's
         membership on the Board of Directors of the Company, if, on the date
         of this Agreement, the optionee is a member of the Board of Directors
         of the Company), or (E) enter into any agreement, understanding or
         arrangement with respect to the sale or voting of its capital stock;

                       (ii)          sell, transfer, lease, pledge, mortgage,
         encumber or otherwise dispose of any of its property or assets which
         are material, in the aggregate, other than with respect to sales of
         oil and gas in the ordinary course of business consistent with past
         practice;

                       (iii)         make or propose any changes in its
         Certificate of Incorporation, as amended, or its By-laws, as amended,
         or other organizational documents;

                       (iv)          merge or consolidate with any other  
         person or acquire a material amount of assets or capital stock of any
         other person or enter into any confidentiality agreement with any
         person, other than in connection with this Agreement and the
         transactions contemplated hereby;

                       (v)           incur, create, assume or otherwise become
         liable for indebtedness for borrowed money, other than in the ordinary
         course of business consistent with past practice, but in no event in
         excess of $100,000, or assume, guarantee, endorse or otherwise as an
         accommodation become responsible or liable for obligations of any
         other individual, corporation or other entity, other than in the
         ordinary course of business consistent with past practice;

                       (vi)          enter into or modify any employment,
         severance, termination or similar agreements or arrangements with, or
         grant any bonuses, salary increases, severance or termination pay to,
         any officer, director, consultant or employee other than salary
         increases and bonuses granted to employees who are not officers or
         directors in the ordinary course of business consistent with past
         practice, or otherwise increase the compensation or benefits provided
         to any officer, director, consultant or employee except as may be
         required by Applicable Law, this Agreement, any applicable collective
         bargaining agreement or a binding written contract in effect on the
         date of this Agreement, or adopt any new employee benefit plan;

                       (vii)         change its method of doing business or 
         change any method or principle of accounting in a manner that is
         inconsistent with past practice;

                                      29
<PAGE>   34

                       (viii)        settle any Actions, whether now pending or
hereafter made or brought involving, in any Action or related series of
Actions, which individually or in the aggregate are in an amount in excess of
$100,000;

                       (ix)          modify, amend or terminate, or waive, 
release or assign any material rights or claims with respect to, any material
Contract to which it is a party or any confidentiality agreement to which it is
a party;

                       (x)           incur or commit to any capital 
expenditures, obligations or liabilities in respect thereof, other than in the
ordinary course of business consistent with past practice, but in no event in
excess of $50,000 individually or $250,000 in the aggregate;

                       (xi)          conduct its business in a manner or take,
or cause to be taken, any other action that would or might reasonably be
expected to prevent or materially delay the Company from consummating the
transactions contemplated by this Agreement (regardless of whether such action
would otherwise be permitted or not prohibited hereunder), including, without
limitation, any action that may materially limit or delay the ability of the
Company to consummate the transactions contemplated by this Agreement as a
result of antitrust or securities laws or other regulatory concerns;

                       (xii)         take any action to exempt under or make not
subject to Section 203 of the DGCL, any person or entity (other than Parent or
its subsidiaries) or any action taken thereby, which person, entity or action
would have otherwise been subject to the restrictive provisions thereof and not
exempt therefrom; or

                       (xiii)        agree to take any action prohibited by 
the foregoing.

         (b)     No Solicitation.  The Company agrees that, during the term of
this Agreement, it will not negotiate with any person other than Parent with
respect to the acquisition of the Company or its Subsidiaries and it will not,
and will not permit any of its officers, directors, employees, affiliates,
agents or representatives (including, without limitation, investment bankers,
attorneys and accountants) to (a) initiate contact with, (b) make, solicit or
encourage any inquiries or proposals from, (c) enter into, or participate in,
any discussions or negotiations with, (d) disclose, directly or indirectly, any
information not customarily disclosed concerning the business and properties of
the Company or its Subsidiaries to or (e) afford any access to the Company's or
its Subsidiaries properties, books and records to any person (other than
Parent, Sub or their respective directors, officers, employees, agents and
representatives) in connection with any possible proposal relating to (i) the
disposition of its respective businesses or all or substantially all of its
assets (except for disposition of assets in the ordinary course of business
consistent with past practice), (ii) the acquisition of equity or debt
securities of the Company or its Subsidiaries (except in connection with the
exercise of options, as permitted in Section 5.3(a)) or (iii) the merger, share
exchange

                                      30
<PAGE>   35
or business combination, or similar acquisition transaction of or involving the
Company or its Subsidiaries with any person other than Parent (each or any
combination of the foregoing a "Company Competing Transaction"); provided that
the Company may (x) furnish information (subject to a confidentiality agreement
in reasonably customary form) to, and negotiate or otherwise engage in
discussions with, any party who delivers a written proposal for a Company
Competing Transaction if and so long as the Board of Directors of the Company
determines in good faith, based upon the written opinion of its outside legal
counsel, that failing to take such action would reasonably be expected to
constitute a breach of the fiduciary duties of the Board and (y) take a
position with respect to the Merger or a Company Competing Transaction, or
amend or withdraw such position, in compliance with Rule 14d-9 or Rule 14e-2
promulgated under the Exchange Act with regard to a Company Competing
Transaction.  From and after the execution of this Agreement, the Company and
each of its Subsidiaries will immediately notify Parent orally, and
subsequently confirm in writing, all the relevant details relating to all
inquiries and proposals which it may receive relating to any such matters.
Subject to the foregoing, the Company will not, and will not permit any of its
representatives or Subsidiaries to enter, at any time, into or participate in
any discussions or negotiations regarding, or accept, any proposal for a
Company Competing Transaction received by them from a third party or that a
third party expresses a desire to communicate with them.

         (c)      Directors, Officers and Employees.  The Company shall take 
any and all action to cause all directors, officers and employees of the Company
and the Subsidiaries to resign and/or be terminated from all positions with the
Company and the Subsidiaries, including termination of any employment
agreements, and to terminate any and all Company Plans, effective prior to the
Effective Time, without cost or penalty to the Company, except with respect to
the severance benefits set forth in Section 4.15(h) and Section 4.15(i) to the
Company Disclosure Schedule.

         (d)      Agreements of Affiliates.  The Company shall deliver to 
Parent, prior to the date the Registration Statement becomes effective under the
Securities Act, a letter (the "Affiliate Letter") identifying all persons who
are, at the time of the Company Stockholders' Meeting, "affiliates" of the
Company for purposes of Rule 145 under the Securities Act.  The Company shall
use its best efforts to cause each person who is identified as an "affiliate" in
the Affiliate Letter to deliver to Parent, prior to the Effective Time, a
written agreement (an "Affiliate Agreement") providing that each such person
will agree not to sell, pledge, transfer or otherwise dispose of, the shares of
Parent Common Stock to be received by such person in the Merger except in
compliance with the applicable provisions of the Securities Act and the
applicable rules and regulations thereunder.

                                      31
<PAGE>   36
                                   ARTICLE VI

                                   CONDITIONS

         6.1  Mutual Conditions.  The obligations of the parties hereto to
consummate the Merger shall be subject to fulfillment of the following
conditions:

              (a)      No temporary restraining order, preliminary or permanent
         injunction or other order or decree which prevents the consummation of
         the Merger shall have been issued and remain in effect, and no statute,
         rule or regulation shall have been enacted by any Governmental
         Authority which prevents the consummation of the Merger.

              (b)      All material consents, approvals, permits or 
         authorizations required to be obtained prior to the Effective Time
         from any Governmental Authority in connection with the execution and
         delivery of this Agreement and the consummation of the transactions
         contemplated hereby shall have been obtained.

              (c)      This Agreement and the transactions contemplated hereby
         shall have been approved and adopted by the affirmative vote of a
         majority of the outstanding shares of Company Common Stock entitled to
         vote thereon, in accordance with Applicable Law, at the Company's
         stockholders' meeting, and the Share Issuance shall have been approved
         by the Parent Stockholders in accordance with the rules of Nasdaq.

              (d)      The Registration Statement shall have become effective 
         under the Securities Act and no stop order suspending the effectiveness
         of the Registration Statement shall have been issued and no proceedings
         for that purpose shall have been initiated or, to the knowledge of
         Parent or the Company, threatened by the Commission or any other
         Governmental Entity.

              (e)      No Action shall be instituted by any Governmental 
         Authority which seeks to prevent consummation of the Merger or which
         seeks material damages in connection with the transactions contemplated
         hereby which continues to be outstanding.

              (f)      The shares of Parent Common Stock to be issued in the
         Merger shall have been authorized for quotation on Nasdaq, subject to
         official notice of issuance.

              (g)      All consents, waivers and approvals of third parties
         required in connection with the transactions contemplated hereby shall
         have been obtained, except where the failure to obtain such consents,
         waivers or approvals, in the aggregate, would not reasonably be
         expected to result in a material adverse effect on Parent or the
         Company, as the case may be, provided that a party which has not used
         all reasonable efforts to obtain a consent, approval or waiver may not
         assert this condition with respect to such consent, approval or
         waiver.

                                          32
<PAGE>   37

              (h)      Parent shall have received an opinion dated as of the
         Closing Date of Akin, Gump, Strauss, Hauer & Feld, L.L.P., to the
         effect that (1) the Merger will constitute a reorganization within the
         meaning of Section 368(a) of the Code and (2) no gain or loss will be
         recognized by Company Stockholders with respect to shares of Parent
         Common Stock received in the Merger in exchange for shares of Company
         Common Stock, except with respect to cash received in lieu of
         fractional shares of Parent Common Stock.  In rendering such opinion,
         such counsel may require and rely on representations contained in
         certificates of Parent, the Company, Sub and others, as they deem
         reasonably appropriate.

         6.2  Conditions to Obligations of the Company.  The obligations of the
Company to consummate the Merger and the transactions contemplated hereby shall
be subject to the fulfillment of the following conditions unless waived by the
Company:

              (a)      The representations and warranties of each of Parent and
         Sub shall be true and correct on the date hereof and on and as of the
         Closing Date as though made on and as of the Closing Date (except for
         representations and warranties made as of a specified date, which need
         be true and correct only as of the specified date), other than such
         breaches of representations and warranties which would not have or
         which would not be reasonably expected to have, in the aggregate, a
         material adverse effect on Parent.

              (b)      Each of Parent and Sub shall have performed in all 
         material respects each obligation and agreement and shall have
         complied in all material respects with each covenant to be performed
         and complied with by it hereunder at or prior to the Effective Time.

              (c)      McDonald shall have delivered an opinion to the Board
         of Directors of the Company, in form reasonably satisfactory to the
         Company, confirming, as of the date of the Proxy Statement, its
         opinion referred to in Section 4.13 hereof.

         6.3  Conditions to Obligations of Parent and Sub.  The obligations of
Parent and Sub to consummate the Merger and the other transactions contemplated
hereby shall be subject to the fulfillment of the following conditions unless
waived by each of Parent and Sub:

              (a)      The representations and warranties of the Company shall
         be true and correct on the date hereof and on and as of the Closing
         Date as though made on and as of the Closing Date (except for
         representations and warranties made as of a specified date, which need
         be true and correct only as of the specified date), other than such
         breaches of representations and warranties which would not have or
         which would not be reasonably expected to have, in the aggregate, a
         material adverse effect on the Company.

                                          33
<PAGE>   38
              (b)      The Company shall have performed in all material
         respects each obligation and agreement and shall have complied in all
         material respects with each covenant to be performed and complied with
         by it hereunder at or prior to the Effective Time.

              (c)      Parent shall have received from each person who is
         identified in the Affiliate Letter as an "affiliate" of the Company,
         an Affiliate Agreement in form and substance satisfactory to Parent.


                                 ARTICLE VII

                               TERMINATION AND AMENDMENT

         7.1  Termination.  This Agreement may be terminated at any time prior
to the Effective Time, whether before or after approval and adoption of this
Agreement by Company Stockholders:

              (a)      by mutual written consent of Parent and the Company;

              (b)      by either Parent or the Company if any permanent
         injunction or other order or decree of a court or other competent
         Governmental Authority preventing the consummation of the Merger shall
         have become final and non-appealable;

              (c)      by either Parent or the Company if the Merger shall not
         have been consummated (i) before April 30, 1998, provided that (ii) if
         the Registration Statement was filed but has not been declared
         effective as of such date, then on or before the date 60 days after the
         Registration Statement is declared effective; unless extended by the
         Boards of Directors of both Parent and the Company (provided that the
         right to terminate this Agreement under this Section 7.1(c) shall not
         be available to any party whose failure to perform any material
         covenant or obligation under this Agreement has been the cause of or
         resulted in the failure of the Merger to occur on or before such date);

              (d)      by Parent or the Company if at the meeting of Company
         Stockholders held for such purpose (including any adjournment or
         postponement thereof) the requisite vote of the Company Stockholders
         to approve the Merger and the transactions contemplated hereby shall
         not have been obtained;

              (e)      by Parent or the Company if at the meeting of Parent
         Stockholders held for such purpose (including any adjournment or
         postponement thereof) the requisite vote of the Parent Stockholders to
         approve the Share Issuance shall not have been obtained;

                                          34
<PAGE>   39
              (f)      by Parent or the Company (provided that the terminating
         party is not then in material breach of any representation, warranty,
         covenant or other agreement contained herein) if there shall have been
         a material breach of any of the covenants or agreements or any of the
         representations or warranties set forth in this Agreement on the part
         of the other party, which breach is not cured within 30 days following
         written notice given by the terminating party to the party committing
         such breach, or which breach, by its nature, cannot be cured prior to
         the Closing, but only if such breach would constitute a failure of a
         condition contained in Section 6.2 or Section 6.3, as applicable;

              (g)      by the Company if the Board of Directors of the Company
         shall determine to engage in a Company Competing Transaction and the
         Company shall have delivered to Parent a written notice of the
         determination by the Company Board of Directors to terminate this
         Agreement pursuant to this Section 7.1(g); provided, however, that the
         Company may not terminate this Agreement pursuant to this clause (g)
         unless (w) five business days shall have elapsed after delivery to
         Parent of the notice referred to above, (x) at the end of such five
         business day period the Company Board of Directors shall continue to
         believe that the failure to engage in such Company Competing
         Transaction would reasonably be expected to be a breach of the
         fiduciary duties of the Board of Directors of the Company (after giving
         effect to any adjustment to the terms and conditions of such
         transactions proposed by Parent in response to such Company Competing
         Transaction) and (y) at the time of such termination, the Company shall
         have paid to Parent the Termination Fee (as hereinafter defined);

              (h)      by Parent if the Board of Directors of the Company shall
         not have recommended the Merger to the Company Stockholders, or shall
         have resolved not to make such recommendation, or shall have materially
         modified or rescinded its recommendation of the Merger to the Company
         Stockholders, or shall have modified or rescinded its approval of this
         Agreement, or shall have entered into an acquisition, merger or similar
         agreement to effect, or shall have effected, a Company Competing
         Transaction, or shall have resolved to do any of the foregoing; or

              (i)      by Parent or the Company if at the meeting of Parent
         Stockholders held for such purpose (including any adjournment or
         postponement thereof) the requisite vote of the Parent Stockholders to
         approve the Share Issuance shall not have been obtained.

         7.2  Effect of Termination.

              (a)      In the event of the termination of this Agreement
pursuant to Section 7.1, this Agreement, except for the provisions of the last
sentence of Section 5.1(e) and the provisions of Sections 7.2 and 8.10, shall
become void and have no effect, without any liability on the part of any party
or its directors, officers, employees or stockholders.

                                          35
<PAGE>   40
Notwithstanding the foregoing, nothing in this Section 7.2 shall relieve any
party to this Agreement of liability for a breach of any provision of this
Agreement prior to such termination.

              (b)      If this Agreement is terminated

                     (i)     Parent or the Company pursuant to Section 7.1(d),
         if (A) a Prior Event (as defined below) shall have occurred prior to
         such termination and (B) either (x) the Company shall enter into a
         definitive agreement with respect to a Company Competing Transaction
         within twelve months following such termination and such Company
         Competing Transaction is thereafter consummated or (y) a Company
         Competing Transaction is consummated within twelve months following
         such termination; or

                     (ii)  by the Company pursuant to Section 7.1(g) or by
         Parent pursuant to Section 7.1(h);

then in any such case the Company will pay to Parent in cash by wire transfer
in immediately available funds to an account designated by Parent a termination
fee in an amount equal to $1,000,000; provided, however, that if this Agreement
has been terminated by Parent pursuant to Section 7.1(h) and the Board of
Directors of the Company has taken any of the actions referenced in Section
7.1(h) because McDonald shall not have delivered its opinion referred to in
Section 6.2(c), then the amount to be paid by the Company shall be the amount
of Parent's out-of-pocket expenses incurred in connection with this
transaction, up to a maximum of $500,000.  Such payment shall be made (a) in
the case of clause (i) above, within one business day following the
consummation of such Company Competing Transaction and (b) in the case of
clause (ii), no later than immediately prior to such termination.

              (c)      If this Agreement is terminated by Parent or the
Company pursuant to Section 7.1(i) and (A) a Parent Prior Event (as defined
below) shall have occurred prior to such termination, and (B) either (x) Parent
shall enter into a definitive agreement with respect to a Parent Competing
Transaction (as defined below) within twelve months following such termination
and such Parent Competing Transaction (as it may be amended) is thereafter
consummated, or (y) a Parent Competing Transaction is consummated within twelve
months following such termination, then Parent will pay to the Company in cash
by wire transfer in immediately available funds to an account designated by the
Company a termination fee in an amount equal to $1,000,000.  Such payment shall
be made within one business day following the consummation of the Parent
Competing Transaction.

              (d)      As used herein, a "Prior Event" shall mean any of the
following events:

                     (i)     any person (other than Parent or any of its
         subsidiaries) shall have commenced (as such term is defined in Rule
         14d-2 under the Exchange Act), or shall

                                          36
<PAGE>   41
         have filed a registration statement under the Securities Act, with
         respect to, a tender offer or exchange offer to purchase any shares of
         Company Common Stock such that, upon consummation of such offer, such
         person would Beneficially Own (as defined below) or control 50% or
         more of the then outstanding Company Common Stock;

                     (ii)    the Company or any of its subsidiaries shall have
         entered into, authorized, recommended, proposed or publicly announced
         an intention to enter into, authorize, recommend, or propose, an
         agreement, arrangement or understanding with any person (other than
         Parent or any of its subsidiaries) to, or any person (other than Parent
         or any of its subsidiaries) shall have announced a bona fide intention
         to, or the Company shall have announced that any person (other than
         Parent or any of it subsidiaries) has proposed or communicated its
         intention to, or the Company shall have received a bona fide proposal
         or communication regarding an intention to, (A) effect any Competing
         Transaction, (B) purchase, lease or otherwise acquire 40% or more of
         the assets of the Company or (C) purchase or otherwise acquire
         (including by way of merger, consolidation, tender or exchange offer or
         similar transaction) Beneficial Ownership of securities representing
         30% or more of the voting power of the Company; or

                     (iii)   any person (other than Parent or any subsidiary of
         Parent) shall have acquired Beneficial Ownership of a number of shares
         of Company Common Stock in addition to the number of shares of Company
         Common Stock Beneficially Owned by such person on the date hereof equal
         to 30% or more of the voting power of the Company.

                 (e)      As used herein, the term "Parent Prior Event" shall
have the same meaning with respect to Parent as the term "Prior Event" has with
respect to the Company, with such changes in the definition thereof as are
appropriate to contemplate Parent in lieu of the Company.

                 (f)      As used herein, the term "Parent Competing
Transaction" shall mean a transaction involving the acquisition of the
businesses or all or substantially all of the assets of Parent, or the merger,
share exchange or business combination, or similar acquisition transaction of
or involving Parent in which (A) persons who immediately prior to the
consummation of such transaction were serving as directors of Parent do not
comprise a majority of the directors of the acquiring or surviving entity
immediately following the consummation of such transaction and (B) the
stockholders of Parent as of the date hereof do not hold collectively a
majority of the shares or equity interests of the acquiring or surviving entity
immediately following the consummation of such transaction.

                 (g)      As used herein, the terms "Beneficial Ownership" and
"Beneficially Own" shall have the meanings ascribed to them in Rule 13d-3 under
the Exchange Act.  As

                                          37
<PAGE>   42
used herein, "person" shall have the meaning specified in Sections 3(a)(9) and
13(d)(3) of the Exchange Act.

         7.3  Amendment.  This Agreement may be amended by the parties hereto,
at any time before or after adoption of this Agreement by Company Stockholders
or authorization of the Share Issuance by Parent Stockholders, but after such
approval or authorization, no amendment shall be made which by law requires
further approval or authorization by the Company Stockholders or Parent
Stockholders, as the case may be, without such further approval or
authorization.  Notwithstanding the foregoing, this Agreement may not be
amended except by an instrument in writing signed on behalf of each of the
parties hereto.

         7.4  Extension; Waiver.  At any time prior to the Effective Time,
Parent (with respect to the Company) and the Company (with respect to Parent
and Sub) may, to the extent legally allowed, (a) extend the time for the
performance of any of the obligations or other acts of such party, (b) waive
any inaccuracies in the representations and warranties contained herein or in
any document delivered pursuant hereto and (c) waive compliance with any of the
agreements or conditions contained herein.  Any agreement on the part of a
party hereto to any such extension or waiver shall be valid only if set forth
in a written instrument signed on behalf of such party.


                                     ARTICLE VIII

                                     MISCELLANEOUS

         8.1  Survival of Representations and Warranties.  The representations
and warranties made herein by the parties hereto shall not survive the
Effective Time.  Notwithstanding the foregoing, this Section 8.1 shall not
limit any covenant or agreement of the parties hereto, which by its terms
contemplates performance after the Effective Time or the termination of this
Agreement.

         8.2  Notices.  All notices and other communications hereunder shall be
in writing and shall be deemed given upon receipt if delivered personally,
telecopied (which is confirmed) or dispatched by a nationally recognized
overnight courier service to the parties at the following addresses (or at such
other address for a party as shall be specified by like notice):

                 (a)      if to Parent or Sub:

                          Southern Mineral Corporation
                          500 Dallas Street, Suite 2800
                          Houston, Texas 77002-4708
                          Attention: Steven H. Mikel
                          Telecopy No.: (713) 658-9447

                                          38
<PAGE>   43
                          with a copy to

                          Akin, Gump, Strauss, Hauer & Feld, L.L.P.
                          711 Louisiana, Suite 1900 - South Tower
                          Houston, Texas  77002
                          Attention:  David S. Peterman
                          Telecopy No.: (713) 236-0822

                 (b)      if to the Company:

                          Amerac Energy Corporation
                          1201 Louisiana, Suite 3350
                          Houston, Texas 77002-5609
                          Attention:  Kenneth R. Peak
                          Telecopy No.:  (713) 308-5285

                          with a copy to

                          James L. Rice III, Esq.
                          Weil, Gotshal & Manges LLP
                          700 Louisiana, Suite 1600
                          Houston, Texas 77002
                          Telecopy No.:  (713) 224-9511

         8.3  Interpretation.  When a reference is made in this Agreement to an
Article or Section, such reference shall be to an Article or Section of this
Agreement unless otherwise indicated.  The headings and the table of contents
contained in this Agreement are for reference purposes only and shall not
affect in any way the meaning or interpretation of this Agreement.  For the
purposes of this Agreement, a "material adverse effect" shall mean, as to any
party, a material adverse effect on the assets, liabilities, results of
operations, business or financial condition of such party and its subsidiaries,
taken as a whole, or on such party's ability to consummate the transactions
contemplated hereby.

         8.4  Counterparts.  This Agreement may be executed in counterparts,
which together shall constitute one and the same agreement.  The parties may
execute more than one copy of this Agreement, each of which shall constitute an
original.

         8.5  Entire Agreement.  This Agreement (including the documents and
the instruments referred to herein) and the Confidentiality Agreement
constitute the entire agreement among the parties and supersede all prior
agreements and understandings by or among the parties, written and oral, with
respect to the subject matter hereof.

                                          39
<PAGE>   44

         8.6  Third Party Beneficiaries.  Nothing in this Agreement, express or
implied, is intended or shall be construed to create any third party
beneficiaries, except for the provisions of Section 5.2(b) which may be
enforced by the beneficiaries thereof.

         8.7  Governing Law.  This Agreement shall be governed and construed in
accordance with the laws of the State of Texas without regard to principles of
conflict of laws.

         8.8  Specific Performance.  The transactions contemplated by this
Agreement are unique and monetary damages would not be an adequate remedy for a
breach hereof.  Accordingly, each of the parties acknowledges and agrees that,
in addition to all other remedies to which it may be entitled, each of the
parties hereto is entitled to a decree of specific performance, provided that
such party is not in material default hereunder.

         8.9  Assignment.  Neither this Agreement nor any of the rights,
interests or obligations hereunder shall be assigned by any of the parties
hereto (whether by operation of law or otherwise) without the prior written
consent of the other parties.  Subject to the preceding sentence, this
Agreement shall be binding upon, inure to the benefit of and be enforceable by
the parties and their respective successors and permitted assigns.

         8.10  Expenses.  Parent and the Company shall pay their own costs and
expenses associated with the transactions contemplated by this Agreement,
except that the Company and Parent shall share equally (i) the filing fees in
connection with the filing of the Proxy Statement and Registration Statement
with the Commission and (ii) the expenses incurred in connection with printing
and mailing the Proxy Statement to the Company Stockholders and the Parent
Stockholders.

         8.11  Incorporation of Disclosure Schedules.  The Company Disclosure
Schedule and the Parent Disclosure Schedule are hereby incorporated herein and
made a part hereof for all purposes as if fully set forth herein.

         8.12  Severability.  Any term or provision of this Agreement which is
invalid or unenforceable in any jurisdiction shall, as to that jurisdiction, be
ineffective to the extent of such invalidity or unenforceability without
rendering invalid or unenforceable the remaining terms and provisions of this
Agreement or affecting the validity or enforceability of any of the terms or
provisions of this Agreement in any other jurisdiction.  If any provision of
this Agreement is so broad as to be unenforceable, the provision shall be
interpreted to be only so broad as is enforceable.

         8.13  Subsidiaries and Affiliates.  As used in this Agreement, the
word "subsidiary" when used with respect to any party means any corporation or
other organization, whether incorporated or unincorporated, of which such party
directly or indirectly owns or controls at least a majority of the securities
or other interests having by their terms ordinary voting power to elect a
majority of the board of directors or others performing similar functions with
respect

                                          40
<PAGE>   45
to such corporation or other organization, or any organization of which such
party is a general partner, and unless otherwise specified, the word
"affiliate" has the meaning ascribed thereto in the Investment Company Act of
1940, as amended.

                                          41
<PAGE>   46
         IN WITNESS WHEREOF, Parent, Sub and the Company have signed this
Agreement as of the date first written above.


                                         SOUTHERN MINERAL CORPORATION



                                                   
                                         By:  /s/ Steven H. Mikel
                                            ------------------------------------
                                              Steven H. Mikel
                                              President and Chief 
                                               Executive Officer



                                         AEC ACQUISITION CORP.



                                         By:  /s/ Steven H. Mikel
                                            ------------------------------------
                                              Steven H. Mikel
                                              President


                                         AMERAC ENERGY CORPORATION



                                         By:  /s/ Jeffrey B. Robinson
                                            -----------------------------------
                                              Jeffrey B. Robinson
                                              President and Chief 
                                               Executive Officer

                                      42

<PAGE>   1

                                                                    EXHIBIT 99.1


                  [SOUTHERN MINERAL CORPORATION LETTERHEAD]

November 17, 1997

          SOUTHERN MINERAL AND AMERAC ENERGY REPORT AGREEMENT TO MERGE

HOUSTON - Southern Mineral Corporation (NASDAQ:SMIN) and Amerac Energy
Corporation (AMEX:AMC) today announced that they have signed a definitive
agreement for the merger of AMC into SMIN.  The combined entities will have
reserves of approximately 80 Bcfe, with operations in Texas and Oklahoma and
properties primarily in Texas, Louisiana, Oklahoma, Canada and Ecuador.  Under
the terms of the agreement, SMIN will exchange its common shares for all AMC
common shares based upon the average closing price of SMIN for a twenty day
period preceding the closing of the merger.  Under the terms of the agreement,
no less than 2.7 million nor more than 3.3 million shares of SMIN common stock
will be exchanged for AMC shares, based upon the average SMIN share price of
$8.25 to $6.75, respectively.  As of October 31, 1997, AMC had 3,891,981 shares
of common stock outstanding.  In addition, SMIN will assume AMC's indebtedness.
The merger is subject to approval of stockholders of both SMIN and AMC.  The
merger is expected to be completed in early 1998.

Amerac is engaged in the acquisition, production and development of oil and gas
properties primarily in Texas and Oklahoma.  Amerac's Common Stock is traded on
the American Stock Exchange under the symbol AMC.

Southern Mineral Corporation is an oil ad gas acquisition, exploration and
production company that owns interests in oil and gas properties located along
the Gulf Coast, Canada and Ecuador.  The Company is listed on the NASDAQ
National Market under the symbol SMIN.


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