TERRITORIAL RESOURCES INC
8-K, 1998-01-30
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>
 
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549


                                    FORM 8-K

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

       Date of Report (Date of earliest event reported) January 28, 1998
                                                        ----------------

                          TERRITORIAL RESOURCES, INC.
       ----------------------------------------------------------------

            (Exact name of registrant as specified in its Charter)


                                   Colorado
          ----------------------------------------------------------
                (State or other jurisdiction of incorporation)


            0-9617                                  84-0821158
- ---------------------------------------  ------------------------------
    (Commission File Number)                   (IRS Employer I.D. No.)

                        734 7th Avenue S.W., Suite 1345
                                Calgary, Alberta
                                 Canada T2P 3P8
 ----------------------------------------------------------------------------
(Address of principal executive offices)                (Zip Code)

       Registrant's telephone number, including area code (403) 233-7914
                                                          --------------
<PAGE>
 
Item 5.   Other Events
          ------------

     On January 28, 1998, Territorial Resources, Inc. ("Territorial") executed a
Reorganization Agreement and Plan of Merger with SOCO International plc, a
public limited company organized in England and Wales ("SOCO"), and SOCO
Resources (Colorado), Inc., a newly formed Colorado corporation and wholly-owned
subsidiary of SOCO ("Newco"), pursuant to which and subject to the conditions
set forth therein, Territorial has agreed to merge with Newco (the "Merger").

     Pursuant to the Agreement, Territorial will call a meeting of its
shareholders to approve a reverse split of its shares of common stock, no par
value ("Territorial Common Stock"), on the basis of one new share for every
36,000 shares currently outstanding.  No new fractional shares will be issued as
a result of the reverse split, and instead, each shareholder who would otherwise
be entitled to receive a fractional new share would receive cash equal to U.S.
$1.40 multiplied by the number of pre-split shares of Territorial Common Stock
held by the shareholder which would otherwise be converted into a fractional new
share of Territorial Common Stock.  Following the approval and effectuation of
the reverse split, expected to occur in March, 1998, Territorial will have less
than 30 remaining shareholders and will terminate its reporting obligations
under the Securities Exchange Act of 1934.  A meeting of the remaining
shareholders is anticipated to be held in June, 1998 to approve the Merger,
pursuant to which each share of Territorial Common Stock held by the remaining
shareholders prior to the reverse split (excluding any shares for which a cash
payment was received in the reverse split) will be valued at U.S. $1.40 and
exchanged for the equivalent value of SOCO shares based on the average trading
price of the SOCO shares on the London Stock Exchange for the ten trading prior
to the closing of the merger.

Item 7.   Financial Statements and Exhibits
          ---------------------------------

     (c)  Exhibits

          99.1  News release dated January 29, 1998 announcing agreement with
                SOCO International plc for the merger of the Company with a
                wholly-owned subsidiary of SOCO International plc.

          99.2  Reorganization Agreement and Plan of Merger dated as of January
                28, 1998 between the Company, SOCO International plc and SOCO
                Resources (Colorado), Inc.
 

                                       2
<PAGE>
 
                                   SIGNATURES

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



                                              TERRITORIAL RESOURCES, INC.
                                         ------------------------------------
                                              (Registrant)


Date:  January 29, 1998

                                         /s/ Daniel A. Mercier
                                        --------------------------------------
                                         Daniel A. Mercier
                                         Chairman of the Board and
                                         Chief Executive Officer

                                       3

<PAGE>
 
                                                                    EXHIBIT 99.1

                                 PRESS RELEASE

                                January 29, 1998

                      SOCO AND TERRITORIAL ANNOUNCE MERGER


Territorial Resources, Inc. (Territorial) announces that, subject to certain
conditions, it has agreed to a merger between Territorial and a wholly owned
subsidiary of SOCO International plc (SOCO), a UK corporation whose shares are
listed for trading on the London Stock Exchange.  The value of the proposed
transaction is approximately US $14.2 million for the approximately 10.2 million
shares of Territorial.  The proposed transaction is subject to obtaining
appropriate regulatory and shareholders' approvals.

To satisfy conditions precedent to the transaction, Territorial will call a
meeting of its shareholders to approve a reverse split of its shares on the
basis of one new share for every 36,000 shares currently held.  A cash
consideration equal to US $1.40 multiplied by the number of shares of
Territorial common stock, which would otherwise be converted into a fractional
share pursuant to the reverse split, will be paid in lieu of issuing fractional
new shares.  Following the reverse split, expected to occur in March 1998,
Territorial will have less than 30 remaining shareholders and will apply for de-
registration with the US Securities and Exchange Commission (SEC).  Upon
completion of the de-registration process, expected to occur approximately 90
days after the shareholders meeting, Territorial will call a meeting of the
remaining shareholders to approve the merger with a newly formed subsidiary of
SOCO.  The merger consideration is essentially a share exchange wherein each
Territorial share held prior to the reverse split will be valued at US $1.40 and
exchanged for the equivalent value of SOCO shares based on the average trading
price for the 10 trading days prior to the date of final closing which is
expected to be approximately June 30, 1998.

The directors of Territorial unanimously agreed that the reverse split and the
proposed merger is in the best interests of all of the shareholders of
Territorial.  The directors of Territorial have retained Sayer Securities
Limited of Calgary, Alberta to advise as to the fairness from a financial point
of view of the consideration to be received by the shareholders.

SOCO holds interests in and operates Territorial's interests in Mongolia and
Thailand.  In addition, SOCO has interests in producing properties in Russia,
England and Yemen and non-producing properties in Tunisia and Vietnam.
Following the merger, Mr. Daniel A. Mercier, Chairman and Chief Executive
Officer of Territorial, will become an officer of SOCO.  Mr. William C.
Penttila,  President of Territorial, and Mr. Dennis M. Buck, Vice President,
Exploration of Territorial are officers of Exploration Associates Inc., an
exploration consulting company which has provided consulting services to both
Territorial and SOCO in the past.  Exploration Associates Inc. will continue to
provide consulting services to SOCO following the merger.

For further information please contact Daniel Mercier or Douglas Baker at (403)
233-7914.

<PAGE>
 
                                                                    EXHIBIT 99.2


                            REORGANIZATION AGREEMENT

                               AND PLAN OF MERGER


                                  BY AND AMONG


                            SOCO INTERNATIONAL PLC,

                        SOCO RESOURCES (COLORADO), INC.,

                                      AND

                          TERRITORIAL RESOURCES, INC.



                                JANUARY 28, 1998
<PAGE>
 
                               TABLE OF CONTENTS

ARTICLE I
Definitions..............................................................  -1-

ARTICLE II
The Reorganization Transactions..........................................  -5-
Section 2.1  Approval by the Territorial Shareholders of Reverse Split...  -5-
Section 2.2  Effectuation of Reverse Split and Exercise of Rights to
             Dissent and Obtain Payment..................................  -6-
Section 2.3  Termination of Territorial Filing Requirements..............  -7-
Section 2.4  The Merger..................................................  -7-
Section 2.5  Approval of Shareholders of Merger..........................  -7-
Section 2.6  Merger Effective Time.......................................  -8-
Section 2.7  The Articles of Incorporation...............................  -8-
Section 2.8  The Bylaws..................................................  -8-
Section 2.9  Officers and Directors......................................  -8-
Section 2.10  Conversion or Cancellation of Territorial Shares and
              Newco Shares...............................................  -8-
Section 2.11  Payment for Territorial Shares.............................  -9-
Section 2.12  Dissenters' Rights in connection with Merger............... -10-
Section 2.13  Transfer of Territorial Shares After the Merger
              Effective Time............................................. -11-
Section 2.14  Purchase of Additional SOCO Shares by Subscribing
              Shareholders............................................... -11-
Section 2.15  Exempt Offering............................................ -12-
Section 2.16  Tax Liabilities Arising from Reverse Split and Merger...... -12-

ARTICLE III
The Closing.............................................................. -13-
Section 3.1  Time and Place of Closing................................... -13-
Section 3.2  Obligations of Territorial at or prior to the Closing....... -13-
Section 3.3  Obligations of the Subscribing Shareholders at or prior
             to the Closing.............................................. -13-
Section 3.4  Obligations of SOCO and Newco at or prior to the Closing.... -14-

ARTICLE IV
Representations, Warranties and Covenants of Territorial................. -14-
Section 4.1  Corporate Organization...................................... -14-
Section 4.2  Capitalization.............................................. -15-
Section 4.3  Authority; No Violation..................................... -15-
Section 4.4  Consents and Approvals...................................... -16-
Section 4.5  Violations of Laws, Permits, etc............................ -16-
Section 4.6  Territorial Financial Statements............................ -17-
Section 4.7  No Undisclosed Liabilities, etc............................. -17-
Section 4.8  Absence of Certain Changes.................................. -17-

                                       i
<PAGE>
 
Section 4.9  Title to Property; Encumbrances............................. -18-
Section 4.10  Proceedings Affecting Territorial Entities................. -19-
Section 4.11  Tax Partnerships........................................... -20-
Section 4.12  Regulatory Compliance...................................... -20-
Section 4.13  Data Regarding the Territorial Entities.................... -20-
Section 4.14  Litigation................................................. -20-
Section 4.15  Tax Returns and Payments................................... -20-
Section 4.16  Insurance.................................................. -21-
Section 4.17  Bank Accounts.............................................. -21-
Section 4.18  Contracts.................................................. -22-
Section 4.19  Transactions with Interested Persons....................... -23-
Section 4.20  Compensation and Employee Plans............................ -23-
Section 4.21  Brokers, Finders and Advisors.............................. -23-
Section 4.22  Labor Force................................................ -23-
Section 4.23  Books and Records.......................................... -24-
Section 4.24  Payments................................................... -24-
Section 4.25  Public Utility Holding Company............................. -24-
Section 4.26  Commission Filings......................................... -24-
Section 4.27  Financing.................................................. -25-
Section 4.28  Disclosure................................................. -25-

ARTICLE V
Representations, Warranties and Covenants of Subscribing Shareholders.... -25-
Section 5.1  Property Rights............................................. -25-
Section 5.2  Binding Agreements.......................................... -25-
Section 5.3  Stock Ownership............................................. -26-
Section 5.4  Consents and Approvals...................................... -26-
Section 5.5  Violations of Laws, Permits, etc............................ -26-
Section 5.6  Accredited Investors........................................ -26-
Section 5.7  Brokers, Finders and Advisors............................... -26-
Section 5.8  Burdensome Agreements and Charter Provisions................ -26-
Section 5.9  Disclosure.................................................. -27-

ARTICLE VI
Representations, Warranties and Covenants of SOCO and Newco.............. -27-
Section 6.1 Organization, etc............................................ -27-
Section 6.2  Capitalization.............................................. -27-
Section 6.3  Authority; No Violation..................................... -28-
Section 6.4  Consents and Approvals...................................... -29-
Section 6.5  Violations of Laws, Permits, etc............................ -29-
Section 6.6  SOCO Financial Statements................................... -29-
Section 6.7  No Undisclosed Liabilities, etc............................. -29-
Section 6.8  Absence of Certain Changes.................................. -29-

                                      ii
<PAGE>
 
Section 6.9  Litigation.................................................. -30-
Section 6.10  Brokers, Finders and Advisors.............................. -31-
Section 6.11  Books and Records.......................................... -31-
Section 6.12  Public Utility Holding Company............................. -31-
Section 6.13  Exchange Filings........................................... -31-
Section 6.14  Disclosure................................................. -31-

ARTICLE VII
Actions of Territorial Prior to the Closing Date......................... -32-
Section 7.1  Affirmative Covenants....................................... -32-
Section 7.2  Negative Covenants.......................................... -32-
Section 7.3  Consents.................................................... -32-
Section 7.4  Advice of Changes........................................... -32-
Section 7.5  Best Efforts................................................ -32-
Section 7.6  Access to Properties and Records............................ -32-
Section 7.7  Supply Documents, Reports, etc.............................. -33-
Section 7.8  Employees................................................... -33-
Section 7.9  No Solicitation, etc........................................ -33-

ARTICLE VIII
Actions of Subscribing Shareholders Prior to the Closing Date............ -34-
Section 8.1  Affirmative Covenants....................................... -34-
Section 8.2  Negative Covenants.......................................... -34-
Section 8.3  Consents.................................................... -34-
Section 8.4  Advice of Changes........................................... -34-
Section 8.5  Best Efforts................................................ -34-
Section 8.6  Access to Properties and Records............................ -34-
Section 8.7  Supply Documents, Reports, etc.............................. -34-
Section 8.8  No Solicitation, etc........................................ -35-

ARTICLE IX
Actions of SOCO and Newco Prior to the Closing Date...................... -35-
Section 9.1  Affirmative Covenants....................................... -35-
Section 9.2  Negative Covenants.......................................... -35-
Section 9.3  Consents.................................................... -36-
Section 9.4  Advice of Changes........................................... -36-
Section 9.5  Best Efforts................................................ -36-
Section 9.6  Additional Information...................................... -36-
Section 9.7  Supply Documents, Reports, etc.............................. -36-

ARTICLE X
Conditions to SOCO's or Newco's Obligations.............................. -36-


                                      iii
<PAGE>
 
ARTICLE XI
Conditions to Territorial's or the Subscribing Shareholders'
Obligations.............................................................. -38-

ARTICLE XII
Additional Agreements.................................................... -39-
Section 12.1  Confidentiality............................................ -39-
Section 12.2  Further Assurances......................................... -39-
Section 12.3   Resignations.............................................. -39-

ARTICLE XIII
Termination, Waiver and Amendment........................................ -39-
Section 13.1  Termination................................................ -39-
Section 13.2  Manner of Exercise......................................... -41-
Section 13.3  Effect of Termination...................................... -41-

ARTICLE XIV
Liability for Warranties and Representations............................. -42-
Section 14.1  Limitation................................................. -42-
Section 14.2   Third Party Claim Procedure............................... -42-

ARTICLE XV
Miscellaneous............................................................ -43-
Section 15.1  Survival................................................... -43-
Section 15.2  Expenses................................................... -43-
Section 15.3  Press Releases............................................. -43-
Section 15.4  Binding Effect............................................. -43-
Section 15.5  Severability............................................... -43-
Section 15.6  Notices.................................................... -44-
Section 15.7  Entire Agreement........................................... -45-
Section 15.8  Amendments; Waivers........................................ -45-
Section 15.9  Headings................................................... -45-
Section 15.10  Counterparts.............................................. -45-
Section 15.11  Specific Performance...................................... -45-
Section 15.12  GOVERNING LAW............................................. -45-
Section 15.13  Schedules................................................. -46-
Section 15.14  Time of Essence........................................... -46-
Section 15.15  Best Efforts.............................................. -46-
Section 15.16  Acknowledgment by Subscribing Shareholders of Legal
               Representation............................................ -46-
Section 15.17  Material Adverse Effect................................... -46-

                                      iv
<PAGE>
 
                  REORGANIZATION AGREEMENT AND PLAN OF MERGER


     THIS REORGANIZATION AGREEMENT AND PLAN OF MERGER (this "Agreement") is
entered into as of January 28, 1998, by and among SOCO INTERNATIONAL PLC, a
public limited company organized in England and Wales ("SOCO"), SOCO RESOURCES
(COLORADO), INC., a newly formed Colorado corporation ("Newco"), TERRITORIAL
RESOURCES, INC., a Colorado corporation ("Territorial"), and the holders of
shares of the capital stock of Territorial affixing their signatures hereto and
listed on Attachment 1 hereto (collectively, the "Subscribing Shareholders").

                                    RECITALS

     The parties desire to effect a merger on the terms, and subject to the
provisions and conditions, of this Agreement.

                                   AGREEMENT

     NOW, THEREFORE, for and in consideration of the premises and the mutual
agreements hereinafter set forth, in accordance with the provisions of
applicable law, the parties hereby agree as follows:

                                   ARTICLE I
                                  DEFINITIONS

     As used in this Agreement and the Exhibits, Attachments, Schedules and
documents delivered pursuant to this Agreement, the following terms shall have
the following meanings:

     "ADEA" means the Age Discrimination in Employment Act, as amended, or any
successor statute.
 
     "Additional SOCO Shares" has the meaning set forth in Section 2.14.

     "Additional Share Subscription Agreement" has the meaning set forth in
Section 2.14.

     "Adverse Consequences" means any and all damages, claims, deficiencies and
losses, delinquencies, liabilities, defaults, assessments, fees, penalties and
interest and expenses (including reasonable attorneys' and accountants' fees and
disbursements).

     "Affiliate" means an "affiliate" or "associate" as those terms are defined
in Rule 12b-2 promulgated by the Commission under the Exchange Act.

     "Alternative Transaction" has the meaning set forth in Section 7.9.

     "Appraisal Notice" has the meaning set forth in Section 2.12(b).


                                       1
<PAGE>
 
     "Articles of Merger" has the meaning set forth in Section 2.6.
 
     "CBCA" means the Colorado Business Corporation Act, or any successor
statute.
 
     "Closing" means the closing referred to in Section 3.1.

     The "Closing Date" is the second business day (other than a Saturday,
Sunday or legal holiday in either the United Kingdom or the United States)
following the day on which the conditions to the obligations of the parties set
forth in Articles X and XI relative to the Closing shall have been satisfied or
waived, or such other time as shall be set by the parties in writing.

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

     "Commission" means the Securities and Exchange Commission and/or any other
Governmental Entity that administers either the Securities Act or the Exchange
Act.

     "Controlling Interest" means Territorial Shares constituting more than 75%
of the Territorial Shares outstanding at the time in question.

     "Conversion Ratio" has the meaning set forth in Section 2.10.

     "Dissenting Shares" has the meaning set forth in Section 2.12.

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

     "Excess SOCO Shares" has the meaning set forth in Section 2.14.

     "Excessive Dissent" means that, in connection with the Merger, the number
of Territorial Shares for which statutory rights to dissent and obtain payment
have been properly asserted pursuant to Article 113 of the CBCA by holders of
Territorial Shares exceed ten percent (10%) of all Territorial Shares
outstanding immediately prior to the Merger Effective Time
 
     "Exchange Act" means the Securities Exchange Act of 1934, as amended, or
any successor statute.

     "GAAP," with respect to the Territorial Entities, means generally accepted
accounting principles set forth in the opinions and pronouncements of the
Accounting Principles Board of the American Institute of Certified Public
Accountants, in statements and pronouncements of the Financial Accounting
Standards Board or in such other statements by such other entity as may be
approved by a significant segment of the accounting profession, which are
applicable to the circumstances as of the date of determination, and with
respect to the SOCO Entities, means Financial Reporting Standards and Statements
of Standard Accounting Practice issued by the Accounting Standards Board and its
predecessor which are current as of the date of determination.

                                       2
<PAGE>
 
     "Governmental Entity" means any federal, state, municipal, domestic or
foreign court, tribunal, administrative agency, department, commission, board,
bureau or other governmental authority or instrumentality.

     "Lock-Up Agreement" has the meaning set forth in Section 2.11.

     "Material Adverse Effect" means a material adverse effect on the business
or financial condition of the applicable party or other person and its
Subsidiaries taken as a whole.

     "Merger" means the merger of Newco with and into Territorial as described
in Section 2.4.

     "Merger Effective Time" has the meaning set forth in Section 2.6.

     "Paying Agent" means the transfer agent for the SOCO Shares.

     "Person" has the meaning set forth in Section 13.1.

     "Plan" means (i) any employee benefit plan as defined in Section 3(3) of
ERISA, which is (a) maintained by a party or any of its Subsidiaries, or (b) to
which a party or any of its Subsidiaries is making or accruing an obligation to
make contributions, or (ii) any other formal or informal obligation to,
arrangement with, or plan or program for the benefit of, employees of a party or
any of its Subsidiaries, including, but not limited to, stock options, stock
bonuses, stock purchase agreements, bonuses, incentive compensation, deferred
compensation, supplemental pensions, vacations, severance pay, insurance or any
other benefit, program or practice.

     "Resolution Notice" has the meaning set forth in Section 2.14.

     "Reverse Split" means the 36,000 to one reverse stock split defined in
Section 2.1(a ).

     "Reverse Split Consideration" has the meaning set forth in Section 2.1.

     "Reverse Split Effective Time" is defined in Section 2.2.

     "Securities Act" means the Securities Act of 1933, as amended, or any
successor statute.
 
     "SOCO" means SOCO International plc, a public limited company incorporated
in England and Wales.

     The "SOCO Disclosure Schedule" is the Disclosure Schedule delivered by SOCO
to Territorial contemporaneously with the execution of this Agreement. Each
heading in the SOCO Disclosure schedule shall refer to the applicable section of
this Agreement.

     "SOCO Entities" means SOCO and its Subsidiaries.

                                       3
<PAGE>
 
     "SOCO Financial Statements" are, collectively, the audited non-statutory
accounts of SOCO for the period from incorporation on 10 January 1997 to 31
March 1997 contained in SOCO's Listing Particulars dated 14 May 1997 and the
unaudited interim financial statements of SOCO as of and for the period ended 30
June 1997.

     "SOCO Market Price" means the higher of (i) average mid-market price per
share of the SOCO Shares on the ten (10) trading days ending on the trading day
last preceding Closing, or (ii) ninety percent (90%) of the mid-market price on
the trading day last preceding Closing.  The mid-market price shall be such
price as derived from the Daily Official List of the London Stock Exchange for
the relevant trading day.
 
     "SOCO Shares" means all of the issued and outstanding ordinary shares of 20
pence each of SOCO.

     "SOCO Shareholders" means the holders of SOCO Shares from time to time.

     "Subscribing Shareholders" means, collectively, the Territorial
Shareholders executing this Agreement and whose names are set forth on
Attachment 1 hereto.

     "Subsidiary" or "Subsidiaries" means any corporation more than fifty
percent (50%) of the voting power of which is owned directly or indirectly by a
party or other relevant person, as the context requires.
 
     "Surviving Corporation" has the meaning set forth in Section 2.4.

     "Taxes" means all taxes, charges, fees, levies, duties or other
assessments, including, without limitation, income, gross receipts, excise, ad
valorem, property, production, severance, sales, use, license, payroll and
franchise taxes, imposed by any Governmental Entity and includes any estimated
tax, interest and penalties or additions to tax.

     "Tax Return" means a report, return or other information required to be
supplied by a party comprising a part of the SOCO Entities or the Territorial
Entities, as the case may be, to a Governmental Entity in connection with Taxes
including, where permitted or required, combined or consolidated returns for any
group of entities that includes that entity.

     "Territorial" means Territorial Resources, Inc., a Colorado corporation.

     "Territorial Certificates" has the meaning set forth in Section 2.11.

     "Territorial Commission Reports" has the meaning set forth in Section 4.26.

     The "Territorial Disclosure Schedule" is the Disclosure Schedule delivered
by Territorial to SOCO contemporaneously with the execution of this Agreement.
Each heading in the Territorial Disclosure Schedule shall refer to the
applicable section of this Agreement.

                                       4
<PAGE>
 
     "Territorial Entities" means Territorial and its Subsidiaries.

     "Territorial's Executives" has the meaning set forth in Section 7.9.

     The "Territorial Financial Statements" are, collectively, the respective
audited consolidated financial statements of the Territorial Entities and the
respective unaudited interim consolidated financial statements of the
Territorial Entities contained in the Territorial Commission Reports.
 
     "Territorial Leases" has the meaning set forth in Section 4.9.

     "Territorial Merger Shareholders' Meeting"  has the meaning set forth in
Section 2.5.

     "Territorial Proxy Statement" has the meaning set forth in Section 2.1.

     "Territorial Reverse Split Shareholders' Meeting" has the meaning set forth
in Section 2.1.

     "Territorial Shares" means all of the issued and outstanding common stock
of Territorial, no par value.

     "Territorial Shareholders" means the holders of Territorial Shares from
time to time.

     "Third Party Claim" has the meaning set forth in Section 14.2.

     "Warranted Party" or  "Warranted Parties" has the meaning set forth in
Section 14.1.

     "Warrantying Party" or "Warrantying Parties" has the meaning set forth in
Section 14.1.


                                   ARTICLE II
                        THE REORGANIZATION TRANSACTIONS

      SECTION 2.1  APPROVAL BY THE TERRITORIAL SHAREHOLDERS OF REVERSE SPLIT.

     (a) As soon as reasonably practicable after the date of this Agreement,
     Territorial will, in compliance with all applicable laws, and in form and
     substance reasonably satisfactory to SOCO, file with the Commission proxy
     solicitation materials reasonably necessary (the "Territorial Proxy
     Statement"), and use its best efforts, to obtain the approval of the
     Territorial Shareholders to a 36,000 to one reverse stock split of the
     Territorial Shares (the "Reverse Split") at a meeting to consider the
     Reverse Split (the "Territorial Reverse Split Shareholders' Meeting").  The
     terms of the Reverse Split shall provide that no fractional Territorial
     Shares shall be issued in connection therewith, and that each Territorial
     Shareholder who would otherwise be entitled to receive a fractional
     Territorial Share shall be paid cash in the amount of $1.40 USD per pre-
     Reverse Split Territorial Share, and which amount the Parties acknowledge
     to be approximately equivalent to a 4:1 (Territorial Shares:SOCO Shares)
     conversion ratio, based on the average mid-market price per share of 

                                       5
<PAGE>
 
     the SOCO Shares on the ten (10) trading days ending on the trading day last
     preceding the date hereof (the "Reverse Split Consideration"). SOCO agrees
     to furnish within a reasonable period to Territorial all information (which
     shall meet the standard of the first sentence of this Section 2.1(a))
     reasonably requested by Territorial in connection with preparing the
     Territorial Proxy Statement, to the extent (i) necessary to comply with
     applicable law, (ii) such information can be obtained and made available
     without unreasonable additional expense and (iii) SOCO is permitted to do
     so under applicable law or regulation. The information contained in the
     Territorial Proxy Statement relating to SOCO shall be in form and substance
     satisfactory to SOCO and shall include all information regarding the SOCO
     Entities required by applicable law or regulation. The Territorial Proxy
     Statement shall also include all information required by applicable law to
     inform holders of the Territorial Shares of all necessary information
     concerning the Reverse Split and of their rights to dissent and obtain
     payment under the CBCA. Territorial agrees to use its best efforts in
     soliciting the approval of the Territorial Shareholders to the Reverse
     Split as soon as is reasonably practicable. Subject to compliance with
     their fiduciary duties in connection with an Alternative Transaction as
     described in Section 7.9 as advised in writing by outside counsel, the
     board of directors of Territorial shall recommend approval by the
     Territorial Shareholders of the Reverse Split, without reservation or
     qualification.

     (b) As soon as reasonably practicable after the date of this Agreement,
     Territorial will take all action necessary in accordance with Colorado law
     and its Articles of Incorporation and Bylaws to convene the Territorial
     Reverse Split Shareholders' Meeting.  Subject to compliance with the
     fiduciary duties of directors of Territorial in connection with an
     Alternative Transaction, Territorial shall take all other action necessary
     or advisable to secure the vote or consent of Territorial Shareholders
     required by Colorado law to effect the Reverse Split.  Irrespective of any
     Alternative Transaction, at the Territorial Reverse Split Shareholders'
     Meeting, each of the Subscribing Shareholders hereby agrees to vote or
     cause to be voted in favor of the Reverse Split all Territorial Shares
     owned or controlled by him or it.

     (c) Territorial shall deduct and withhold from the consideration otherwise
     payable as a result of the Reverse Split to any holder of Territorial
     Shares such amounts as Territorial is required to deduct and withhold with
     respect to the making of such payment under the Code, or any provision of
     state, local or foreign tax law.  To the extent that amounts are so
     withheld by Territorial, such withheld amounts shall be treated for all
     purposes of this Agreement as having been paid to the holders of the
     Territorial Shares in respect of which such deduction and withholding was
     made by Territorial.

      SECTION 2.2  EFFECTUATION OF REVERSE SPLIT AND EXERCISE OF RIGHTS TO
DISSENT AND OBTAIN PAYMENT.  Upon approval of the Reverse Split by the
Territorial Shareholders, unless this Agreement has been terminated as permitted
by the terms of Section 13.1, Territorial shall take all steps required to
effectuate the Reverse Split.  The Reverse Split shall become effective at the
date and time at which Territorial's Articles of Incorporation is amended by the
filing of Articles of Amendment with the Secretary of State of Colorado, and
such time is referred to in this Agreement as the "Reverse Split Effective
Time."  Territorial shall comply with Article 113 of the CBCA concerning any

                                       6
<PAGE>
 
exercise of rights to dissent and obtain payment by Territorial Shareholders in
connection with the Reverse Split.

      SECTION 2.3  TERMINATION OF TERRITORIAL FILING REQUIREMENTS.  As soon as
practicable after the Reverse Split Effective Time, in compliance with all
applicable laws and in form and substance reasonably satisfactory to SOCO,
Territorial will terminate all its reporting obligations under the Exchange Act
by filing with the Commission a proper certification on Form 15.  Upon such
filing, Territorial shall promptly take all other actions reasonably incident to
effecting the termination of its reporting obligations and of its registration
under the Exchange Act as soon as practicable.

      SECTION 2.4  THE MERGER.  Subject to the terms and conditions of this
Agreement, at the Merger Effective Time, Newco shall be merged with and into
Territorial and the separate corporate existence of Newco shall cease (the
"Merger").  Territorial shall be the surviving corporation in the Merger
(sometimes referred to as the "Surviving Corporation") and shall continue to be
governed by the laws of the State of Colorado, and the separate corporate
existence of Territorial with all its rights, privileges, immunities, powers and
franchises shall continue unaffected by the Merger, except as set forth below in
this Article 2.  The Merger shall have the effects specified in the CBCA.

      SECTION 2.5  APPROVAL OF SHAREHOLDERS OF MERGER.

     (a) As soon as practicable after the termination of Territorial's reporting
     obligations under the Exchange Act, in compliance with all applicable state
     and federal laws and in form and substance satisfactory to SOCO,
     Territorial shall use its best efforts to obtain the approval by the
     Territorial Shareholders of the Merger at a meeting to consider the Merger
     (the "Territorial Merger Shareholders' Meeting").  SOCO agrees to furnish
     to Territorial within a reasonable period all information (which shall meet
     the standard of the preceding sentence) reasonably requested by Territorial
     in connection with preparing any proxy materials. The materials furnished
     to Territorial Shareholders pursuant to the first sentence of this Section
     2.5(a) related to the SOCO Entities shall in form and substance be
     satisfactory to SOCO and shall include all information regarding the SOCO
     Entities required by applicable law.  The materials shall also include all
     information required by applicable law  and regulations to inform holders
     of the Territorial Shares of all necessary information concerning the
     Merger and the issuance of SOCO Shares in accordance with the terms of
     Section 2.10 and of their rights to dissent and obtain payment under the
     CBCA.  SOCO agrees to use its best efforts to cooperate with Territorial in
     soliciting the approval of the Territorial Shareholders to the Merger as
     soon as is reasonably practicable. Subject to compliance with their
     fiduciary duties in connection with an Alternative Transaction as described
     in Section 7.9, as advised in writing by independent counsel, the board of
     directors of Territorial shall recommend approval by the Territorial
     Shareholders of the Merger, without reservation or qualification.
 
     (b) As soon as reasonably practicable after the termination of
     Territorial's obligations to file reports under the Exchange Act,
     Territorial will take all action necessary in accordance with the CBCA and
     its Articles of Incorporation and Bylaws to convene the Territorial Merger
     Shareholders' Meeting.  Subject to compliance with the fiduciary duties of
     directors of Territorial in connection with an Alternative Transaction as
     described in Section 7.9 as 

                                       7
<PAGE>
 
     advised in writing by independent counsel, Territorial shall take all other
     action necessary or advisable to secure the vote or consent of Territorial
     Shareholders in accordance with Colorado law to effect the Merger.
     Irrespective of any Alternative Transaction, the Subscribing Shareholders,
     acting severally, but not jointly, shall vote or cause to be voted at the
     Territorial Merger Shareholders' Meeting, in favor of the Merger, all
     Territorial Shares owned by them.

      SECTION 2.6  MERGER EFFECTIVE TIME.  On the Closing Date, Territorial and
SOCO will cause Articles of Merger (the "Articles of Merger") in substantially
the same form as that attached hereto as Exhibit A to be executed and filed with
the Secretary of State of Colorado as provided in Section 7-101-204 of the CBCA
to reflect the Merger.  The Merger shall become effective at the date and time
at which the Articles of Merger is duly filed with the Secretary of State of
Colorado, and such time is referred to in this Agreement as the "Merger
Effective Time."

      SECTION 2.7  THE ARTICLES OF INCORPORATION.  At the Merger Effective Time,
the Articles of Incorporation of Territorial shall be amended and restated so as
to conform, in form and substance, to the Articles of Incorporation of Newco, as
in effect immediately prior to the Merger Effective Time, which amended and
restated Articles shall be the Articles of the Surviving Corporation, until duly
amended in accordance with the terms thereof and the CBCA; provided however,
that, at the Merger Effective Time, Article I of the Articles of Incorporation
of the Surviving Corporation shall read as follows: "The name of the corporation
is: Territorial Resources, Inc."

      SECTION 2.8  THE BYLAWS.  The Bylaws of Newco in effect at the Merger
Effective Time shall be the Bylaws of the Surviving Corporation, until duly
amended in accordance with the terms thereof and the CBCA.

      SECTION 2.9  OFFICERS AND DIRECTORS.  The officers and directors of Newco
at the Merger Effective Time shall be the officers and directors of the
Surviving Corporation until their successors have been duly elected or appointed
and qualified or until their earlier death, resignation or removal in accordance
with the Surviving Corporation's Articles of Incorporation and Bylaws.

      SECTION 2.10  CONVERSION OR CANCELLATION OF TERRITORIAL SHARES AND NEWCO
SHARES.  The Territorial Shares shall be canceled and the Newco Shares shall be
converted in the Merger as follows:

     (a)  At the Merger Effective Time, each Territorial Common Share issued and
     outstanding immediately prior to the Merger Effective Time, other than
     Dissenting Shares and Territorial Shares to be canceled pursuant to Section
     2.10(d), shall by virtue of the Merger and without any action on the part
     of the holder thereof, be converted into the right to receive the number of
     SOCO Shares equal to the quotient of: $1.40 USD expressed in Pounds
     Sterling at the prevailing USD-to-Pounds Sterling exchange rate as of the
     close of business on the day immediately preceding the Merger Effective
     Time, divided by the SOCO Market Price (such quotient is sometimes referred
     to herein as the "Conversion Ratio"). The Conversion Ratio shall be
     adjusted to give effect to the Reverse Split, if effectuated (by
     multiplying the 

                                       8
<PAGE>
 
     aforementioned quotient times 36,000), and after such adjustment shall
     thereafter be considered, and referred to as, the "Conversion Ratio."

     (b)  By virtue of the Merger and without any action on the part of the
     holders thereof, all Territorial Shares shall no longer be outstanding and
     shall be canceled and shall cease to exist and each holder of a certificate
     representing Territorial Shares shall thereafter cease to have any rights
     with respect to such Territorial Shares, and in consideration therefor
     shall be entitled to receive the SOCO Shares specified in this Section upon
     the surrender of the certificate representing the Territorial Shares as
     provided in Section 2.11 or the right, if any, to receive payment from the
     Surviving Corporation of the "fair value" of such Territorial Shares as
     determined in accordance with Section 7-113-101 of the CBCA.  This
     Agreement shall effect an amendment to the Articles of Incorporation of
     Territorial with the effects described in this Article II, and approval of
     this Agreement by holders of Territorial Shares shall constitute approval
     of such amendments. Until such surrender, no dividend or other
     distribution, if any, payable to holders of record of SOCO Shares as of any
     date on or after the Merger Effective Time shall be paid to the holder of
     certificates representing Territorial Shares but upon surrender of the
     certificates representing Territorial Shares as provided in Section 2.11,
     such holder shall be entitled to receive all dividends and other
     distributions, if any, without interest, that have become payable
     subsequent to the Merger Effective Time with respect to the number of SOCO
     Shares such holder is to receive.

     (c)  At the Merger Effective Time, each Newco Share issued and outstanding
     immediately prior to the Merger Effective Time shall, by virtue of the
     Merger and without any action on the part of Newco or the holder of such
     Shares, be converted into one share of common stock of the Surviving
     Corporation.

     (d) Each Territorial Share held in the treasury of Territorial shall be
     canceled and extinguished without any conversion thereof and no payment
     shall be made with respect thereto.  All options to acquire Territorial
     Shares outstanding on the date hereof shall terminate if not fully
     exercised prior to the expiration of the 30 day period immediately
     following the date hereof.

      SECTION 2.11  PAYMENT FOR TERRITORIAL SHARES.

     (a) On or after the Closing Date, the Paying Agent will distribute the
     allocated SOCO shares as provided herein. Upon surrender to the Paying
     Agent of the letter of transmittal provided for such purpose, duly executed
     and completed in accordance with the instructions thereto, accompanied by
     the certificates that at the Merger Effective Time shall have evidenced
     Territorial Shares to be exchanged pursuant to the Merger ("Territorial
     Certificates") and a duly executed Lock-Up Agreement and Investor
     Questionnaire in the form attached to this Agreement as Exhibit B ("Lock-Up
     Agreement"), SOCO shall promptly cause to be distributed to each person in
     whose name such Territorial Certificate shall have been registered
     certificates representing the whole SOCO Shares into which any shares
     previously represented by Territorial Certificates shall have been
     converted at the Merger Effective 

                                       9
<PAGE>
 
     Time, together with any dividends or distributions thereon to which such
     person is entitled pursuant to the terms of Section 2.10(b).

     (b)  Fractional SOCO Shares will not be issued to any person.  In lieu of
     issuing a fractional SOCO Share to any person, SOCO will round the number
     of SOCO Shares to be issued to each person to the nearest whole number of
     SOCO Shares. No cash will be paid for fractional shares not received.

     (c)  If SOCO Shares are to be issued to a person other than the registered
     holder of the certificates surrendered, it shall be a condition of such
     issue that the certificates so surrendered shall be properly endorsed or
     otherwise in proper form for transfer and that the person requesting such
     delivery shall pay any transfer or other taxes required by reason of the
     delivery to a person other than the registered holder of the certificates
     surrendered or establish to the satisfaction of SOCO or the Paying Agent
     that such tax has been paid or is not applicable.

     (d) Until surrendered as contemplated in Section 2.11(a) above, each
     Territorial Certificate that immediately prior to the Merger Effective Time
     represented Territorial Shares shall be deemed at and after the Merger
     Effective Time to represent only the right to receive upon surrender the
     SOCO Shares contemplated by Section 2.11(a) and any dividends or
     distributions thereon. Notwithstanding the foregoing, neither the Paying
     Agent nor any party hereto shall be liable to any holder of certificates
     formerly representing Territorial Shares for any SOCO Shares or any
     dividends or distributions thereon delivered to a public official pursuant
     to any applicable abandoned property, escheat or similar law.  Subject to
     the provisions of Section 2.12(b), SOCO shall pay all charges and expenses,
     including those of the Paying Agent, in connection with the exchange of
     SOCO Shares for Territorial Shares.

     (e) SOCO Shares into which Territorial Shares shall have been converted in
     the Merger pursuant to this Article II shall be deemed to have been issued
     in full satisfaction of all rights pertaining to such Territorial Shares.

     (f) SOCO shall deduct and withhold from the consideration otherwise payable
     as a result of the Merger pursuant to this Agreement to any holder of
     Territorial Shares such amounts as SOCO is required to deduct and withhold
     with respect to the making of such payment under the Code, or any provision
     of state, local or foreign tax law.  To the extent that amounts are so
     withheld by SOCO, such withheld amounts shall be treated for all purposes
     of this Agreement as having been paid to the holders of the Territorial
     Shares in respect of which such deduction and withholding was made by SOCO.

      SECTION 2.12  DISSENTERS' RIGHTS IN CONNECTION WITH MERGER.

     (a)  Notwithstanding anything in this Agreement to the contrary,
     Territorial Shares that are issued and outstanding immediately prior to the
     Merger Effective Time and that are held by Territorial Shareholders who
     have delivered a written notice of such Territorial Shareholders' intention
     to demand payment for the Territorial Shares held by such shareholder in
     the 

                                      10
<PAGE>
 
     manner provided in Article 113 of the CBCA (the "Dissenting Shares")
     shall not be converted into the right to receive the consideration provided
     in Section 2.10(a), unless and until such holder shall have failed to
     perfect or shall have effectively withdrawn or lost the right to dissent
     and obtain payment under the CBCA, as the case may be.  If such holder
     shall have failed to perfect or shall have effectively withdrawn or lost
     such right, the Territorial Shares shall thereupon be deemed to have been
     canceled and the holders thereof to have become entitled, with effect from
     the Merger Effective Time, to receive the consideration specified in
     Section 2.10.

     (b)  Territorial promptly shall provide SOCO a copy of each written notice
     ("Appraisal Notice") given by or on behalf of any dissenting Territorial
     Shareholder of his or its intention to demand payment of  the "fair value"
     of the Territorial Shareholder's Territorial Shares, as provided in Article
     113 of the CBCA, specifying the number of Territorial Shares for which such
     Appraisal Notice shall have been given.  The Surviving Corporation shall
     thereupon have sole and exclusive rights to conduct and resolve, in its
     sole discretion, all negotiations, proceedings and ultimate disposition
     with respect to any such demands in any manner that the Surviving
     Corporation may elect. All such payments to dissenting shareholders shall
     be made solely by the Surviving Corporation and shall not be made by, nor
     shall SOCO reimburse the Surviving Corporation for, such payments, except
     as expressly otherwise provided in this Agreement.

      SECTION 2.13  TRANSFER OF TERRITORIAL SHARES AFTER THE MERGER EFFECTIVE
TIME.  No transfers of Territorial Shares shall be made on the stock transfer
books of the Surviving Corporation at or after the Merger Effective Time.  If,
after the Merger Effective Time, certificates formerly representing Territorial
Shares are presented to the Surviving Corporation, they shall be canceled and
the holders thereof shall instead be entitled to be issued SOCO Shares as
provided in this Article II.

      SECTION 2.14  PURCHASE OF ADDITIONAL SOCO SHARES BY SUBSCRIBING
SHAREHOLDERS. The Subscribing Shareholders severally, but not jointly, agree to
purchase SOCO Shares pursuant to the following terms and conditions:

     (a)  If and to the extent that an Excessive Dissent occurs, and if SOCO
     does not terminate this Agreement as permitted pursuant to Section
     13.1(b)(iii), then promptly following the Notices of Demand concerning the
     Territorial Shares constituting the Excessive Dissent, the Subscribing
     Shareholders shall severally, but not jointly, be obligated to subscribe
     for an amount of SOCO Shares ("Additional SOCO Shares") that is equivalent
     (based on the Conversion Ratio, as adjusted to reflect the Reverse Split)
     to the number of Territorial Shares constituting the Excessive Dissent, as
     adjusted in accordance with Section 2.14(c). The obligations of the
     Subscribing Shareholders to subscribe for Additional SOCO Shares shall be
     several, and not joint, and shall be allocated among the Subscribing
     Shareholders pro rata in accordance with the relative number of Territorial
     Shares, as among themselves, owned by the Subscribing Shareholders.

                                      11
<PAGE>
 
     (b) Each of the Subscribing Shareholders and SOCO shall execute an
     Additional Share Subscription Agreement in the form attached to this
     Agreement as Exhibit C ("Additional Share Subscription Agreement") to
     evidence, in the aggregate, subscriptions to purchase the Additional SOCO
     Shares under this Agreement, as adjusted in accordance with Section
     2.14(c), and deposit in escrow with SOCO as therein provided the purchase
     price of the Additional SOCO Shares, ignoring for these purposes any
     adjustments that might be made pursuant to Section 2.14(c). The sale and
     purchase of the Additional SOCO Shares shall be effected promptly following
     resolution of the Appraisal Claims at a closing with same day funds (USD)
     at the SOCO Market Price (expressed in USD based on the then prevailing
     USD-to-Pounds Sterling exchange rate).

     (c)  If Territorial resolves the Appraisal Claims (whether by final
     judgment, settlement or otherwise), then, to the extent that Territorial is
     required (or has agreed) to purchase a number of Territorial Shares that
     either (i) results in the Appraisal Claims no longer constituting an
     Excessive Dissent, or (ii) reduces the extent to which the Appraisal Claims
     constitute an Excessive Dissent, then the obligation of each Remaining
     Subscribing Shareholder under the Additional Share Subscription Agreement
     shall be either (x) in the event of (i) above, canceled, or (y) in the
     event of (ii) above, reduced by that portion of the Additional SOCO Shares
     that is equivalent (based on the Conversion Ratio, as adjusted to reflect
     the Reverse Split) to the Territorial Shares attributable to the reduction
     of Appraisal Claims, allocated pro rata among the Remaining Subscribing
     Shareholders in accordance with the relative number of Additional SOCO
     Shares, as among themselves, for which the Remaining Subscribing
     Shareholders have previously subscribed pursuant to this Section 2.14.

     (d)  Upon resolution of the Appraisal Claims, Territorial shall notify SOCO
     and the Subscribing Shareholders in writing (the "Resolution Notice"),
     specifying the number of Territorial Shares that Territorial is required
     (or has agreed) to purchase under Section 2.12.

      SECTION 2.15  EXEMPT OFFERING.  All of the parties hereto acknowledge that
none of the SOCO Shares to be issued to Territorial Shareholders pursuant to the
Merger or any part thereof have been or will be registered under the Securities
Act in reliance upon exemptions from registration, nor have such SOCO Shares or
any part thereof been (nor is it intended that such shares or any part thereof
will be) registered under any other securities laws.   Consequently, neither
such SOCO Shares nor any part thereof can be sold, transferred or assigned in
the United States without compliance with the applicable provisions of, or
exemptions from, the Securities Act and other applicable securities and other
laws.  Territorial and SOCO shall cause information to be delivered to
Territorial Shareholders to the extent necessary for the issuance of the SOCO
Shares upon the Merger to be exempt from the registration requirements of the
Securities Act, applicable regulations promulgated thereunder and any applicable
state securities laws or regulations.  Contemporaneously with the execution
hereof, each of the Subscribing Shareholders and SOCO shall execute a Lock-Up
Agreement.

      SECTION 2.16  TAX LIABILITIES ARISING FROM REVERSE SPLIT AND MERGER.  Each
of the Subscribing Shareholders mutually acknowledges and agrees with
Territorial, SOCO and each other 

                                      12
<PAGE>
 
that each Subscribing Shareholder shall bear its own income or other tax
liabilities arising from the Reverse Split and/or Merger, and neither
Territorial, SOCO nor any other Subscribing Shareholder shall have any
responsibility concerning any such liability. Furthermore, the parties mutually
acknowledge and agree with each other that no representations or warranties have
been made by any party to this Agreement concerning the possible tax treatment
to be obtained by any party hereto or any Territorial Shareholder as a result of
the transactions contemplated hereby.


                                  ARTICLE III
                                  THE CLOSING

      SECTION 3.1  TIME AND PLACE OF CLOSING.  The closing of the Merger (the
"Closing"), unless otherwise agreed to in writing by the parties, take place at
the offices of Woodard, Hall & Primm, P.C., 7100 Chase Tower, Houston, Texas, on
the "Closing Date."

      SECTION 3.2  OBLIGATIONS OF TERRITORIAL AT OR PRIOR TO THE CLOSING.  At or
prior to the Closing, Territorial shall, subject to the conditions expressed in
this Agreement, deliver to SOCO the following:

     (a) A certificate of the corporate secretary of Territorial attaching
     copies of the resolutions of the board of directors and the Territorial
     Shareholders approving the Merger;

     (b)  The Articles of Merger duly executed on behalf of Territorial;

     (c)  The certificate of an officer of Territorial referred to in Section
     10(d);

     (d) A Lock-Up Agreement properly executed by each of the Territorial
     Shareholders (other than the Subscribing Shareholders), effective after the
     Reverse Split, relating to his or its investment in the SOCO Shares;

     (e) All contracts, contract amendments, Territorial Oil and Gas Contracts,
     commitments, leases, books, records, files and other data relating to any
     of the Territorial Entities and their assets then in the possession of the
     Territorial Shareholders;

     (f) All consents or approvals of any third party that are required to be
     identified pursuant to Section 4.4; and

     (g) Such other documents as are required pursuant to this Agreement or as
     may reasonably be requested from Territorial by SOCO or its counsel.

      SECTION 3.3  OBLIGATIONS OF THE SUBSCRIBING SHAREHOLDERS AT OR PRIOR TO
THE CLOSING. Contemporaneously with the execution of this Agreement, each of the
Subscribing Shareholders shall deliver to SOCO a Lock-Up Agreement properly
executed by such Subscribing Shareholder relating to his or its investment in
the SOCO Shares.

                                      13
<PAGE>
 
     At or prior to the Closing, the Subscribing Shareholders shall, subject to
the conditions expressed in this Agreement, deliver to SOCO and Territorial the
following:

     (a) If an Excessive Dissent occurs and SOCO elects to proceed with the
     Closing, an Additional Share Subscription Agreement from each of the
     Subscribing Shareholders and the consideration therein provided;

     (b) All consents or approvals of any third party that are required to be
     identified pursuant to Section 5.4; and

     (c) Such other documents as are required pursuant to this Agreement or as
     may reasonably be requested from the Subscribing Shareholders by SOCO or
     its counsel.

      SECTION 3.4  OBLIGATIONS OF SOCO AND NEWCO AT OR PRIOR TO THE CLOSING.
Contemporaneously with the execution of this Agreement, SOCO shall execute the
Lock-Up Agreements executed and delivered by the Subscribing Shareholders under
Section 3.3.

     At or prior to the Closing, SOCO shall, subject to the conditions expressed
in this Agreement, deliver to Territorial the following:

     (a) A certificate of the corporate secretary of SOCO attaching copies of
     corporate resolutions duly adopted by its board of directors approving the
     Merger, the issue of new SOCO Shares and authorizing the consummation of
     the transactions contemplated hereby;

     (b) A certificate of the corporate secretary of Newco attaching copies of
     corporate resolutions duly adopted by its board of directors and SOCO (as
     its sole shareholder) approving the Merger and authorizing the consummation
     of the transactions contemplated hereby;

     (c) The Articles of Merger duly executed on behalf of Newco;

     (d) The certificate of an officer of SOCO and Newco referred to in Section
     11(a); and

     (e) All consents or approvals of any third party that are required to be
     identified pursuant to Section 6.4.


                                   ARTICLE IV
            REPRESENTATIONS, WARRANTIES AND COVENANTS OF TERRITORIAL

     Except as expressly set forth and specifically identified by section number
of this Agreement in the Territorial Disclosure Schedule, Territorial
represents, warrants and covenants to SOCO and Newco, on the date hereof and as
of the Closing Date, as follows:

      SECTION 4.1  CORPORATE ORGANIZATION.

                                      14
<PAGE>
 
     (a)  Each of the Territorial Entities is a corporation duly organized and
     validly existing as a corporation and in good standing under the laws of
     its jurisdiction of incorporation.  Each of the Territorial Entities has
     the requisite corporate power and authority to carry on its business as now
     being conducted and to own, lease and operate its property and assets, and
     each of the Territorial Entities is duly qualified or licensed to do
     business and is in good standing in every jurisdiction in which the failure
     to be so qualified and licensed could have a Material Adverse Effect.
     Section 4.1 of the Territorial Disclosure Schedule sets forth the name and
     state of incorporation of each of the Territorial Entities and each state
     in which each of them is qualified or licensed to do business.  Territorial
     has heretofore delivered to SOCO true, correct and complete copies of each
     of the Territorial Entities' respective Articles of Incorporation and
     Bylaws as presently in effect.

     (b)  Section 4.1 of the Territorial Disclosure Schedule sets forth a
     complete list of the present officers and directors of each of the
     Territorial Entities.

      SECTION 4.2  CAPITALIZATION.

     (a) The authorized, issued and outstanding capital stock of each of the
     Territorial Entities is as set forth in Section 4.2 of the Territorial
     Disclosure Schedule.  All of the issued shares of each of the Territorial
     Entities are validly issued, fully paid and nonassessable and none of such
     shares have been issued in violation of the preemptive rights of any
     person.

     (b) Except as set forth in Section 4.2 of the Territorial Disclosure
     Schedule, there are no (i) shares of capital stock or other securities
     bearing voting or other equity rights, whether contingent or not, of any of
     the Territorial Entities outstanding; (ii) outstanding subscriptions, puts,
     options, warrants or other rights, contractual or otherwise, to purchase or
     acquire any capital stock of any of the Territorial Entities; or (iii)
     contracts, commitments, understandings, arrangements or restrictions by
     which any of the Territorial Entities is or may become bound to issue any
     additional equity interests or any options or rights with respect thereto,
     or any securities convertible into any equity interests, except for options
     held by directors and officers of Territorial (including Subscribing
     Shareholders) to purchase an aggregate of 225,557 Territorial Shares, all
     of which options are fully vested and must be entirely exercised prior to
     the expiration of the 30 day period immediately following the execution
     hereof.

     (c)  The issued and outstanding stock of Territorial owned by the
     directors, executive officers and 5% or greater Shareholders of Territorial
     is owned of record, and to the knowledge of Territorial, beneficially, as
     described in Section 4.2 of the Territorial Disclosure Schedule.
     Territorial owns all of the issued and outstanding stock of each of its
     Subsidiaries, directly or indirectly, free and clear of all encumbrances,
     options and other third party rights.  Except for its Subsidiaries, neither
     Territorial nor any of its Subsidiaries owns or holds any equity, debt or
     other interest in any entity or business or any option to acquire any such
     interest, except for accounts receivable that have arisen in the ordinary
     course of business.
 
      SECTION 4.3  AUTHORITY; NO VIOLATION.

                                      15
<PAGE>
 
     (a) The execution and performance of this Agreement by Territorial have
     been duly and validly authorized by the board of directors of Territorial
     and, except for the approval of the Territorial Shareholders, no other
     corporate action is necessary to authorize the execution, delivery and
     performance of this Agreement by Territorial or to consummate the
     transactions contemplated hereby. Territorial has full, absolute and
     unrestricted right, power and authority to execute and perform this
     Agreement and, subject to the approval by the Territorial Shareholders, to
     carry out the transactions contemplated hereby. This Agreement has been
     duly and validly executed by Territorial and, subject to approval by the
     Territorial Shareholders, is a valid and binding obligation of Territorial,
     enforceable in accordance with its terms, except as enforceability may be
     limited by bankruptcy, moratorium, reorganization, receivership or similar
     laws affecting the rights of creditors generally. There is no restriction
     on business combinations applicable to the transactions contemplated
     hereby.

     (b) None of the execution, delivery or performance of this Agreement does
     or will, after the giving of notice, lapse of time or otherwise, (i) result
     in any violation of or be in conflict with or constitute a default under
     any term or provision of the Articles of Incorporation or Bylaws of any of
     the Territorial Entities of or any term or provision of any judgment,
     decree, order, statute, injunction, rule or regulation applicable to any of
     the Territorial Entities, or of any material note, bond, mortgage,
     indenture, lease, license, franchise, agreement or other instrument or
     obligation to which any of the Territorial Entities is bound; (ii) result
     in the creation of any encumbrance, option or other third party right upon
     Territorial Shares, the securities of the Surviving Corporation or any of
     the properties or assets of the Territorial Entities pursuant to any such
     term or provision; or (iii) constitute a material default under or give any
     party the right to accelerate, amend or modify, terminate, abandon or
     refuse to perform or comply with, any material contract, agreement,
     arrangement, commitment or plan to which any Territorial Entities is a
     party, or by which any of the Territorial Entities or any of their rights,
     properties or assets may be subject or bound.

      SECTION 4.4  CONSENTS AND APPROVALS.  No consent, waiver, approval or
authorization of, or declaration, designation, filing, registration or
qualification with, any Governmental Entity or any third party, is required to
be made or obtained by the Territorial Entities in connection with the
execution, delivery and performance of this Agreement or to preserve any
material rights and benefits enjoyed by any of the Territorial Entities on the
date hereof following the consummation of the transactions contemplated by this
Agreement except (a) those that have already been obtained or (b) those
expressly referenced in this Agreement.

      SECTION 4.5  VIOLATIONS OF LAWS, PERMITS, ETC.

     (a)  None of the Territorial Entities is in violation of any term or
     provision of its Articles of Incorporation or Bylaws.  None of the
     Territorial Entities is in violation of any term or provision of any
     judgment, decree, order, statute, injunction, rule, ordinance or regulation
     applicable to it, or of any agreement or instrument applicable to such
     entity where the violation thereof would result in a Material Adverse
     Effect.

                                      16
<PAGE>
 
     (b) Each of the Territorial Entities holds and has maintained in full force
     and effect all certificates, licenses and permits material to the conduct
     of its business, and has not received any notification that any revocation
     or limitation thereof is threatened or pending where such revocation or
     limitation would result in a Material Adverse Effect.

      SECTION 4.6  TERRITORIAL FINANCIAL STATEMENTS.

     (a) In all material respects, each of the consolidated Territorial
     Financial Statements (including, in each case, any related notes thereto)
     fairly presents the consolidated assets, liabilities and financial position
     of the respective entities purported to be covered thereby as of the dates
     thereof and the results of their operations and cash flow for the
     respective periods ended on such dates, all in accordance with GAAP
     consistently applied throughout the periods involved, except that the
     unaudited interim financial statements were and are subject to normal,
     recurring year-end adjustments (which will not, individually or in the
     aggregate, have a Material Adverse Effect).

     (b) Each of the Territorial Financial Statements was prepared from the
     books and records of each of the respective entities purported to be
     covered thereby. None of the Territorial Financial Statements contain any
     items of a material special or nonrecurring nature, except as expressly
     noted in such statements.

      SECTION 4.7  NO UNDISCLOSED LIABILITIES, ETC.  None of the Territorial
Entities has any material liabilities or obligations, whether direct, indirect,
absolute or contingent (including, without limitation, liabilities as guarantor
or otherwise with respect to obligations of others), except (a) liabilities that
are fully reflected on or reserved against on the latest balance sheet of such
entity included in the Territorial Financial Statements or described in the
footnotes to the Territorial Financial Statements or (b) liabilities incurred in
the ordinary course of business since the date of the latest balance sheet
included in the Territorial Financial Statements that are consistent with past
practice that would not, individually or in the aggregate, have a Material
Adverse Effect.

      SECTION 4.8  ABSENCE OF CERTAIN CHANGES.  Since the date of the latest
audited  Territorial Financial Statement, except as specifically disclosed in
the Territorial Commission Reports filed since that date to the date of this
Agreement, all of the Territorial Entities have conducted their businesses only
in the ordinary course and in a manner consistent with prior practice, and none
of the Territorial Entities has:

     (a) Suffered any change in financial condition, results of operation or
     business or any damage, destruction or loss (whether or not covered by
     insurance) with respect to any assets having a Material Adverse Effect;

     (b) Changed accounting methods, principles or practices, or adopted or made
     any change in any pension, retirement, profitsharing or other employee
     benefit plan or arrangement, or revalued any assets, including, without
     limitation, writing down the value of any inventory or writing off notes or
     accounts receivable other than in the ordinary course of business;

                                      17
<PAGE>
 
     (c) Borrowed or agreed to borrow any money or incurred, assumed or become
     subject to, whether directly or by way of guarantee or otherwise, any other
     material obligation or liability for borrowed money, whether absolute or
     contingent, other than borrowings to pay the cash amounts required under
     the Reverse Split;

     (d) (i) Issued, purchased or redeemed any of its capital securities or any
     option, warrant or right to purchase any of the same; or (ii) authorized,
     declared or made any dividends, distributions of earnings or capital on, or
     splits or any other reclassification of its equity securities;

     (e)  Mortgaged, pledged or subjected to any encumbrance, option or other
     third party right, any of its assets, tangible or intangible, having a
     value in excess of $25,000 in the aggregate, other than the pledge of
     Territorial's SOCO Shares to secure borrowings to pay the cash amounts
     required by Territorial to effect the Reverse Split;

     (f) Acquired or disposed of, or entered into any agreement to acquire or
     dispose of, any assets or properties (other than oil and gas production in
     the ordinary course of business) having a value in excess of $25,000 in the
     aggregate;

     (g)  Increased the salaries, compensation, pension or other benefits
     payable, or paid any bonuses, to its officers and directors or their
     Affiliates;

     (h) Forgiven or canceled any debts or claims or waived any rights against
     the Territorial Shareholders or any officer or director of the Territorial
     Entities or their Affiliates or forgiven or canceled any debts or claims or
     waived any rights against any other person in excess of $25,000 in the
     aggregate;

     (i) Entered into, terminated or received notice of the termination of any
     commitment, contract, agreement or transaction that is material to any of
     the Territorial Entities; or

     (j) Agreed, either in writing or otherwise, to take any action described in
     this Section 4.8.

      SECTION 4.9  TITLE TO PROPERTY; ENCUMBRANCES.

     (a)  The Territorial Entities have (and as of the Closing will have) good
     and defensible title to all of their properties and assets, real and
     personal, described in the Territorial Commission Reports, free and clear
     of all mortgage liens, and free and clear of all other liens, charges and
     encumbrances, options or other rights of third parties except liens for
     taxes not yet due and payable and such minor imperfections of title, if
     any, as would not have a Material Adverse Effect.

     (b)  The Territorial Entities own no real property, including but not
     limited to oil and gas properties, other than the properties described in
     the Territorial Commission Reports. Section 4.18 of the Territorial
     Disclosure Schedule sets forth a complete list of all real property that
     the Territorial Entities lease or sublease or with respect to which any of
     the Territorial 

                                      18
<PAGE>
 
     Entities hold concessions to develop real property, including but not
     limited to oil and gas properties, or have agreed to share oil and gas
     production from real property. Territorial has delivered to SOCO correct
     and complete copies of all such leases, concessions, production sharing
     agreements or other documents to which any of its properties, real or
     personal, are subject (the "Territorial Leases"). With respect to each such
     Territorial Lease: (i) each Territorial Lease is legal, valid, binding,
     enforceable and in full force and effect; (ii) each Territorial Lease will
     continue to be legal, valid, binding, enforceable and in full force and
     effect on identical terms following the consummation of the transactions
     contemplated hereby; (iii) to the knowledge of the Territorial Entities, no
     party to any Territorial Lease is in breach or default and no event has
     occurred which, with notice or lapse of time, would constitute a breach or
     default or permit termination, modification or acceleration thereunder;
     (iv) to the knowledge of the Territorial Entities, no party to any
     Territorial Lease has repudiated any provision thereof; (v) to the
     knowledge of the Territorial Entities, there are no disputes, oral
     agreements or forbearance programs in effect as to any Territorial Lease;
     (vi) with respect to each sublease included as a Territorial Lease, the
     representations and warranties set forth in subsections (i) and (v) above
     are true and correct with respect to the underlying lease; (vii) none of
     the Territorial Entities has assigned, transferred, conveyed, mortgaged,
     deeded in trust or encumbered any interest in the leasehold, subleasehold,
     concession or production sharing arrangement; (viii) to the knowledge of
     the Territorial Entities, all facilities leased or subleased thereunder
     have received all approvals of all Governmental Entities (including
     licenses and permits) required in connection with the operation thereof and
     have been operated and maintained in accordance with applicable laws and
     regulations; (ix) all facilities leased or subleased thereunder are
     supplied with utilities and other services necessary for the operation of
     said facilities; and (x) to the knowledge of the Territorial Entities, the
     owner of the facility leased or subleased has good and marketable title to
     the parcel of real property, free and clear of any security interest,
     easement, covenant or other restriction, except for installments of special
     easements not yet delinquent and recorded easements, covenants, and other
     restrictions which do not impair the current use, occupancy or value or the
     marketability of title, of the property subject thereto.

     (c)  There are no properties (real, personal or mixed, tangible or
     intangible) owned by any Territorial Shareholders or any Affiliate of the
     Territorial Shareholders that are used in the normal day-to-day operations
     of the Territorial Entities as conducted prior to the Closing Date.

     (d)  The properties and assets described in (a) and (b) above are free and
     clear of any and all encumbrances, options or other third party rights.

      SECTION 4.10  PROCEEDINGS AFFECTING TERRITORIAL ENTITIES.  There is no
action, proceeding, investigation, inquiry, claim or demand pending or, to the
knowledge of the Territorial Entities, threatened that is likely to result in
the material impairment or loss of any of the Territorial Entities' title to any
part of the assets or properties of the Territorial Entities or that might
hinder or impede in any material respect the use, operation or value of such
assets and properties, and Territorial shall promptly notify SOCO of any such
suit, action, investigation, inquiry, claim or demand arising or threatened
prior to the Closing with respect to which Territorial receives notice.  To the
knowledge 

                                      19
<PAGE>
 
of the Territorial Entities, there are no facts, events or conditions
existing with respect to operations or conditions of any of their respective
assets or properties  which are reasonably likely to hinder or impede the use,
operation or value of the such assets or properties in any material respect or
which are reasonably likely to form the basis of a claim of any party against
any of the Territorial Entities or any of their assets that would result in a
Material Adverse Effect.

      SECTION 4.11  TAX PARTNERSHIPS.  None of the Territorial Entities have
filed any federal or state income tax returns identifying their respective
assets or properties, including the Territorial Leases, as held by any tax
partnership.

      SECTION 4.12  REGULATORY COMPLIANCE.  To the knowledge of the Territorial
Entities, all material filings and approvals under applicable law, or required
under any rules or regulations adopted by any Governmental Entity which are
necessary for the operation of their respective assets or properties, including
the Territorial Leases, in the manner in which they are presently operated, have
been made or granted.

      SECTION 4.13  DATA REGARDING THE TERRITORIAL ENTITIES.  All of the
information described in Sections 7.6 and 7.7 made or to be made available to
SOCO and its representatives is accurate and complete in all material respects,
when considered in context and together with all relevant information made
available.

      SECTION 4.14  LITIGATION.

     (a) There is no action, proceeding, investigation or inquiry pending or, to
     the knowledge of the Territorial Entities, threatened (i) against or
     affecting any of the Territorial Entities or their assets or ordinary
     conduct of the business that, if determined adversely to the Territorial
     Entities, would result in a Material Adverse Effect or (ii) that questions
     this Agreement or any action contemplated by this Agreement or in
     connection with the Merger.

     (b) There are no citations, fines or penalties heretofore asserted against
     any of the Territorial Entities or their assets under any federal, state or
     local law relating to air, noise or water pollution or other environmental
     protection matters, or relating to occupational health or safety, of which
     such entity has received notice and that remain unpaid or that could
     otherwise bind the assets of any of the Territorial Entities and that would
     result in a Material Adverse Effect.

     (c) Territorial has no knowledge of any state of facts or of the occurrence
     or nonoccurrence of any event or group of related events, that should
     reasonably cause Territorial to determine that there exists any basis for
     any material claim against the Territorial Entities for any of the matters
     described in paragraphs(a) or (b).

      SECTION 4.15  TAX RETURNS AND PAYMENTS.

     (a) The Territorial Entities (or the common parent of any affiliated group
     of which any of such entities is or has been a member) have duly filed in
     correct form in all material respects 

                                      20
<PAGE>
 
     all Tax Returns required to be filed by such entities and have duly paid or
     provided for payment of (or there have been paid on their behalf) all Taxes
     due or claimed to be due from them by federal, state, local or foreign
     taxing authorities, excluding Taxes that are being contested in good faith
     by appropriate proceedings and as to which adequate reserves have been
     provided and that are specifically identified in Section 4.15 of the
     Territorial Disclosure Schedule.

     (b) There are no tax liens upon any property or assets owned by any of the
     Territorial Entities that would have a Material Adverse Effect.

     (c) All Tax Returns of the Territorial Entities filed, including any
     amendments to date, have been prepared in good faith without willful
     misrepresentation and are complete and accurate in all material respects.
     The Tax Returns of the Territorial Entities have never been examined by the
     Internal Revenue Service or any other Governmental Entity. There are no
     outstanding agreements, waivers or other arrangements providing for an
     extension of time with respect to the filing of any Tax Returns or the
     payment by, or assessment against, any of the Territorial Entities for any
     Taxes.  Each of the Territorial Entities is taxed as a C corporation under
     the Code.

     (d) The reserves made for Taxes on the respective balance sheets in the
     Territorial Financial Statements are sufficient for the payment of all
     unpaid Taxes due and payable by the Territorial Entities attributable to
     all periods ended on or before the date of the respective balance sheets in
     accordance with GAAP.

      SECTION 4.16  INSURANCE.  Section 4.16 of the Territorial Disclosure
Schedule contains a true, correct, and complete description of all policies of
fire, casualty and extended coverage, public liability, products liability,
worker's compensation and other forms of insurance owned or held by or for the
benefit of the Territorial Entities (other than insurance owned or held by
operators for Territorial Leases or other properties where one of the
Territorial Entities is not the operator).  All such policies are sufficient for
material compliance with all requirements of law and all agreements for which
those entities are parties, are, to the knowledge of the Territorial Entities,
valid and enforceable policies, will remain in full force and effect through the
respective dates set forth in Section 4.16 of the Territorial Disclosure
Schedule, subject to the timely payment of the premiums set forth therein, and
will not in any way be affected by, or terminate or lapse by reason of, the
transactions contemplated by this Agreement.  All premiums due under such
policies have been paid and the insureds have complied in all material respects
with such policies.

      SECTION 4.17  BANK ACCOUNTS.  Section 4.17 of the Territorial Disclosure
Schedule sets forth the names and locations of all banking or financial
institutions at which the Territorial Entities maintain accounts, lock boxes or
other financial deposits of any nature, the account or box number and the names
of all persons authorized to draw thereon or make withdrawals therefrom.

                                      21
<PAGE>
 
      SECTION 4.18  CONTRACTS.

     (a) Section 4.18 of the Territorial Disclosure Schedule contains a complete
     and correct list as of the date hereof of all agreements, contracts and
     commitments of the following types (and all amendments thereto), written or
     oral, to which any of the Territorial Entities is a party or by which any
     of their properties is bound (except for those to which SOCO or a SOCO
     Entity is a party): (i) notes, agreements, mortgages, indentures, security
     agreements and other instruments relating to the borrowing of money or
     evidence of credit or the deferred purchase price of property, or the
     direct or indirect guarantee by such entities of any such indebtedness or
     deferred purchase price, in excess of $20,000; (ii)  leases of real
     property and material personal property providing for payments under any
     such lease or group of related leases at an annual rate in excess of
     $25,000 (other than Territorial Leases); (iii)  partnership or joint
     venture agreements; (iv) management, employment and consulting agreements
     or other contracts for personal services (including without limitation any
     agreements between Territorial and any of its directors) that are not
     terminable by any of such entities on not more than one month's notice
     without penalty or other termination liability;(v) agreements providing for
     liability for severance pay, collective bargaining agreements, labor
     contracts, or labor or personnel policies; (vi)  surety, performance and
     maintenance bonds in excess of $5,000; (vii) agreements or commitments for
     capital expenditures in excess of $25,000; (viii) any plan, contract or
     arrangement providing for bonuses, pensions, deferred compensation,
     retirement plan payments, profit sharing, incentive pay, or for any other
     employee benefit plan; (ix) brokerage or finder's agreements; (x) any
     agreement that (a) restricts the right of such entities to engage in any
     place in any line of business or (b) would restrict the right of the
     Surviving Corporation or any Subsidiary of the Surviving Corporation to
     engage in any line of business after the Closing Date; (xi) any contract,
     commitment or agreement that involves the disposition after March 31, 1997
     of any assets of any of such entities not in the ordinary course of
     business consistent with past practice; (xii) any contract, commitment or
     agreement between any of such entities or between any of such entities and
     any director or officer of any of the Territorial Entities in excess of
     $10,000; (xiii) any Territorial Oil and Gas Contract that commits any of
     the Territorial Entities to make any capital expenditures in any calendar
     year; and (xiv) other agreements, contracts and commitments that in any way
     involve payments or receipts during the remaining term of such agreement,
     contract or commitment in excess of $25,000.

     (b) Territorial has made available to SOCO complete and correct copies of
     all written agreements, contracts and commitments, together with all
     amendments thereto, and accurate (in all material respects) descriptions of
     all oral agreements, in all cases, described in subparagraph (a).  Such
     agreements, contracts and commitments are in full force and effect, and all
     of such entities and, to the knowledge of the Territorial Entities, all
     other parties to such agreements, contracts and commitments have performed
     all obligations required to be performed by them to date thereunder in all
     material respects and are not in default thereunder in any material
     respect.

     (c) None of the Territorial Entities has outstanding any powers of
     attorney, including powers of attorney with respect to representation
     before any Governmental Entity, customs agents 

                                      22
<PAGE>
 
     and brokers, or given in connection with qualification to conduct business
     in any other jurisdiction.

      SECTION 4.19  TRANSACTIONS WITH INTERESTED PERSONS.  No officer or
director of any of the Territorial Entities (or spouse or any child thereof)
owns, directly or indirectly, on an individual or joint basis, any material
interest in, or serves as an officer, director or employee of, any customer,
competitor or supplier of or any person or entity that has a material contract
or arrangement with any of the Territorial Entities, except for holdings of
capital stock not exceeding one percent (1%) of the total number of shares of
capital stock of such customer, competitor or supplier outstanding.

      SECTION 4.20  COMPENSATION AND EMPLOYEE PLANS.

     (a) Territorial has provided SOCO (i) the names and current annual
     compensation rates of all present directors, officers, employees,
     independent contractors or agents of each of the Territorial Entities and
     (ii) the number, job category and range of compensation by job category of
     all employees of such entities.

     (b) Section 4.20 of the Territorial Disclosure Schedule sets forth the name
     of each Plan applicable to any of the Territorial Entities and lists all
     documents evidencing any Plan applicable to any of the Territorial
     Entities.

     (c) Each Plan applicable to any of the Territorial Entities is now, and has
     been from its inception, administered in compliance in all material
     respects with the provisions of all applicable laws and regulations,
     including ERISA, the Code and the ADEA, insofar as such statutes are
     applicable to such Plan.

      SECTION 4.21  BROKERS, FINDERS AND ADVISORS.  Territorial has not employed
any broker, finder, or investment advisor (other than Sayer Securities Limited)
on its behalf, or incurred any liability for any brokerage or finder's fees or
commissions in connection with the transaction contemplated hereby. Territorial
has furnished to SOCO a complete and correct copy of all agreements between
Territorial and Sayer Securities Limited pursuant to which such firm would be
entitled to any payment relating to the transactions contemplated hereunder.
Territorial has received from Sayer Securities Limited an opinion, either orally
or in writing, on or prior to the date hereof, to the effect that the
consideration to be received by the holders of Territorial Shares pursuant to
the Reverse Split and otherwise pursuant to this Agreement is fair from a
financial point of view to such holders.

      SECTION 4.22  LABOR FORCE.

     (a) Each of the Territorial Entities is in compliance in all material
     respects with all applicable laws (including without limitation federal
     income tax laws), ordinances, regulations, statutes, rules and restrictions
     of any Governmental Entity respecting employment and employment practices
     and terms and conditions of employment.

                                      23
<PAGE>
 
     (b) No union representation question exists respecting the employees of any
     of the Territorial Entities and, to the knowledge of the Territorial
     Entities, no union organizing activities are taking place.

      SECTION 4.23  BOOKS AND RECORDS.  The books and records of each of the
Territorial Entities (including, without limitation, the books of account,
minute books and stock record books) are complete and correct in all material
respects and have been maintained in accordance with sound business practices.
The minute books of each of the Territorial Entities contain accurate and
complete records in all material respects of all meetings held of, and corporate
action taken by, the shareholders and the Boards of Directors of the respective
entities and no meetings of or actions by such shareholders or any such Boards
of Directors have been held or taken for which minutes have not been prepared
and are not contained in such minute books.  None of the records and written
documents furnished or made available to SOCO's representatives or agents by the
Territorial Entities, when considered in context and together with any relevant
or related documents also so furnished or made available, contain any untrue
statement of material fact or omit a material fact necessary to make any
statement therein not misleading.

      SECTION 4.24  PAYMENTS.  None of the Territorial Entities has, directly or
indirectly, paid or delivered any fee, commission or other sum of money or item
of property however characterized to any finder, agent, government official or
other party, in the United States or any other country, in any manner related to
its business or operations, which such entity knows or has reason to believe to
have been illegal under any federal, state or local laws of the United States or
any other country or territory having jurisdiction over such entity, and has not
participated, directly or indirectly, in any boycotts or similar practices.

      SECTION 4.25  PUBLIC UTILITY HOLDING COMPANY.  None of the Territorial
Entities owns or operates any facilities used for the retail distribution of
natural or manufactured gas for heat, light or power, nor does any of the
Territorial Entities, directly or indirectly, own, control or hold with power to
vote ten percent (10%) or more of the outstanding stock of, or exercise direct
or indirect controlling influence over the management or policies of such a
company or a company so controlling such a company.

      SECTION 4.26  COMMISSION FILINGS.  Territorial has filed all forms,
reports and documents required to be filed with the Commission since March 31,
1994, including  all proxy statements, all other reports and registration
statements, and all amendments and supplements to all such reports or
registration statements, including without limitation any reports required under
Section 13(a) of the Exchange Act  (collectively, the "Territorial Commission
Reports"), and upon the Reverse Split will be eligible to file a certification
with the Commission on Form 15.  Territorial has delivered to SOCO copies of (i)
Territorial's Form 10KSB Annual Report for each of the fiscal years ending March
31, 1994, 1995, 1996 and 1997 (excluding Exhibits thereto), (ii) Territorial's
10QSB Quarterly Reports for the six month period ending September 30, 1997, and
(iii) Territorial's proxy statement dated April 4, 1997 for its Annual Meeting
of Shareholders held on April 30, 1997.  All of the Territorial Commission
Reports were prepared in accordance with the requirements of all applicable laws
and did not at the time they were filed 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 

                                      24
<PAGE>
 
statements therein, in the light of the circumstances under which they were
made, not misleading. None of the Territorial Entities (other than Territorial)
is required to file any reports, forms or other documents with the Commission.
The Territorial Proxy Statement shall not, at the date it is first mailed to
Territorial Shareholders, at the time of the Territorial Reverse Split
Shareholders' Meeting, and at the Reverse Split Effective Time, include any
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading, except that no
representation is made with respect to information furnished by SOCO to
Territorial for inclusion in the Proxy Statement. The materials distributed to
Territorial Shareholders by Territorial in connection with the Territorial
Merger Shareholders' Meeting shall not, at the date such materials are first
mailed to Territorial Shareholders, at the time of the Territorial Merger
Shareholders' Meeting, and at the Merger Effective Time, include any untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading, except that no
representation is made with respect to information furnished by SOCO to
Territorial for inclusion in such materials.

      SECTION 4.27  FINANCING.  Territorial will have the funds necessary to
consummate the Reverse Split at the appropriate time.

      SECTION 4.28  DISCLOSURE.  No representation or warranty made by
Territorial in this Agreement (including, without limitation, in the Territorial
Disclosure Schedule) contains any untrue statement of material fact or omits or
will omit to state any material fact necessary to make the statements herein or
therein not misleading in light of the circumstances under which made.
 

                                   ARTICLE V
     REPRESENTATIONS, WARRANTIES AND COVENANTS OF SUBSCRIBING SHAREHOLDERS

     Except as expressly set forth and specifically identified by section number
of this Agreement in the Subscribing Shareholders Disclosure Schedule, each of
the Subscribing Shareholders represents, warrants and covenants to SOCO, on the
date hereof and as of the Closing Date, as follows:

      SECTION 5.1  PROPERTY RIGHTS.  Such Subscribing Shareholder has no right,
title or interest in or to the Territorial Leases or any other properties, real
or personal, of any of the Territorial Entities described in the Territorial
Commission Reports.
 
      SECTION 5.2  BINDING AGREEMENTS.  This Agreement and any other agreements
or instruments executed by such Subscribing Shareholder in connection herewith
have been duly executed and delivered, constitute valid and binding obligations
of the Subscribing Shareholder and are enforceable in accordance with their
terms, subject to applicable bankruptcy, insolvency, reorganization, moratorium
or other laws of general application relating to or affecting enforcement of
creditors' rights and rules or laws concerning equitable remedies.

                                      25
<PAGE>
 
      SECTION 5.3  STOCK OWNERSHIP.

     (a)  Such Subscribing Shareholder owns good and defensible title to the
     Territorial Shares listed opposite his or its name on Attachment 1 hereto,
     free and clear of any claims or other liabilities.

     (b) None of the execution, delivery or performance of this Agreement does
     or will, after the giving of notice, lapse of time or otherwise, (i) result
     in any violation of or be in conflict with or constitute a default under
     any term or provision of the organizational documents of such Subscribing
     Shareholder or any term or provision of any judgment, decree, order,
     statute, injunction, rule or regulation applicable to such Subscribing
     Shareholder or of any material note, bond, mortgage, indenture, lease,
     license, franchise, agreement or other instrument or obligation to which
     such Subscribing Shareholder is bound; (ii) result in the creation of any
     encumbrance, option or other third party right upon SOCO Shares, the
     securities of the Surviving Corporation or any of the properties or assets
     of such Subscribing Shareholder pursuant to any such term or provision; or
     (iii) constitute a material default under or give any party the right to
     accelerate, amend or modify, terminate, abandon or refuse to perform or
     comply with, any material contract, agreement, arrangement, commitment or
     plan to which such Subscribing Shareholder is a party, or by which such
     Subscribing Shareholder or any of his or its rights, properties or assets
     may be subject or bound.

      SECTION 5.4  CONSENTS AND APPROVALS.  No consent, waiver, approval or
authorization of, or declaration, designation, filing, registration or
qualification with, any Governmental Entity or any third party, is required to
be made or obtained by such Subscribing Shareholder in connection with the
execution, delivery and performance of this Agreement or to preserve any
material rights and benefits enjoyed by such Subscribing Shareholder on the date
hereof following the consummation of the transactions contemplated by this
Agreement except (a) those that have already been obtained or (b) those
specifically contemplated by this Agreement.

      SECTION 5.5  VIOLATIONS OF LAWS, PERMITS, ETC.  Such Subscribing
Shareholder is not in violation of any term or provision of any judgment,
decree, order, statute, injunction, rule, ordinance or regulation applicable to
him or it, or of any agreement or instrument applicable to him or it where the
violation thereof would interfere with the consummation of the transactions
contemplated by this Agreement or would result in a Material Adverse Effect
regarding a Territorial Entity or title to the Territorial Shares listed
opposite his or its name on Attachment 1 hereto.

      SECTION 5.6  ACCREDITED INVESTORS.  Such Subscribing Shareholder is an
"accredited investor," as that term is defined in Rule 502 under the Securities
Act.

      SECTION 5.7  BROKERS, FINDERS AND ADVISORS.  Such Subscribing Shareholder
has not employed any broker, finder, or investment advisor on its behalf, or
incurred any liability for any brokerage or finder's fees or commissions in
connection with the transaction contemplated hereby.

      SECTION 5.8  BURDENSOME AGREEMENTS AND CHARTER PROVISIONS.  Such
Subscribing Shareholder is not a party to any contract or agreement or subject
to any charter or other corporate 

                                      26
<PAGE>
 
restriction which is a burdensome contract, agreement or restriction that could
interfere with the consummation of the transactions contemplated by this
Agreement or would result in a Material Adverse Effect regarding a Territorial
Entity or title to the Territorial Shares listed opposite his or its name on
Attachment 1 hereto.

      SECTION 5.9  DISCLOSURE.  No representation or warranty made by such
Subscribing Shareholder in this Agreement (including, without limitation, in the
Subscribing Shareholders Disclosure Schedule) contains any untrue statement of
material fact or omits or will omit to state any material fact necessary to make
his or its statements herein or therein not misleading in light of the
circumstances under which made.  Furthermore, such Subscribing Shareholder is
not aware of any untrue statement of material fact in the foregoing
representations or warranties of any other Subscribing Shareholder or omission
by any other Subscribing Shareholder of any material fact necessary to make such
other Subscribing Shareholder's statements herein or therein not misleading in
light of the circumstances under which made.


                                   ARTICLE VI
          REPRESENTATIONS, WARRANTIES AND COVENANTS OF SOCO AND NEWCO

     Except as expressly set forth and specifically identified by section number
of this Agreement in the SOCO Disclosure Schedule, SOCO and Newco, jointly and
severally, represent, warrant and covenant to Territorial, on the date hereof
and as of the Closing Date, as follows:

      SECTION 6.1 ORGANIZATION, ETC.  SOCO is a public limited company duly
incorporated and validly existing under the laws of England and Wales. Newco is
a corporation duly incorporated and validly existing under the laws of the State
of Colorado. Each of SOCO's U.K. Subsidiaries is a limited company duly
incorporated and validly existing under the laws of England and Wales. Each of
SOCO's other Subsidiaries is a corporation duly organized, validly existing and
in good standing under the laws of its jurisdiction of incorporation. Each of
the SOCO Entities has the requisite corporate power and authority to carry on
its business as now being conducted and to own, lease and operate its property
and assets, and each of the United States SOCO Entities is duly qualified or
licensed to do business and is in good standing in every jurisdiction in which
the failure to be so qualified and licensed could have a Material Adverse
Effect.  Section 6.1 of the SOCO Disclosure Schedule sets forth the name and
jurisdiction of incorporation of each of SOCO's Subsidiaries and each
jurisdiction in which each of the SOCO Entities is qualified or licensed to do
business.

      SECTION 6.2  CAPITALIZATION.

     (a)  The authorized, issued and outstanding capital stock of each of the
     SOCO Entities is as set forth in Section 6.2 of the SOCO Disclosure
     Schedule.  All of the issued shares of each of the SOCO Entities are
     validly issued and fully paid, and all of the SOCO Shares to be issued in
     consideration of the cancellation of Territorial Shares upon consummation
     of the Merger, when issued in accordance with the terms of this Agreement,
     will be validly issued, fully paid and nonassessable and freely tradable on
     the London Stock Exchange Limited in "offshore transactions," as defined in
     Regulation S under the Securities Act of 1933, as 

                                      27
<PAGE>
 
     amended (subject to the contractual limitations set forth in the Lock-Up
     Agreement), and none of such shares have been or will be issued in
     violation of the preemptive rights of any person.

     (b) Except as set forth in Section 6.2 of the SOCO Disclosure Schedule,
     there are no (i) shares of capital stock or other securities bearing voting
     or other equity rights, whether contingent or not, of any of the SOCO
     Entities outstanding; (ii) outstanding subscriptions, puts, options,
     warrants or other rights, contractual or otherwise, to purchase or acquire
     any capital stock of any of the SOCO Entities; or (iii) contracts,
     commitments, understandings, arrangements or restrictions by which any of
     the SOCO Entities is or may become bound to issue any additional equity
     interests or any options or rights with respect thereto, or any securities
     convertible into any equity interests.

     (c)  SOCO beneficially owns all of the issued and outstanding stock of each
     of its Subsidiaries, directly or indirectly, free and clear of all
     encumbrances, options or other third party rights.
 
      SECTION 6.3  AUTHORITY; NO VIOLATION.

     (a)  The execution and performance of this Agreement by SOCO and Newco have
     been duly and validly authorized by the respective boards of directors of
     SOCO and Newco, and no other corporate action is necessary to authorize the
     execution, delivery and performance of this Agreement by SOCO or Newco.
     SOCO has full, absolute and unrestricted right, power and authority to
     execute and perform this Agreement and to carry out the transactions
     contemplated hereby.  This Agreement has been duly and validly executed by
     SOCO and Newco and is a valid and binding obligation of SOCO and Newco,
     enforceable in accordance with its terms, except as enforceability may be
     limited by bankruptcy, moratorium, reorganization, receivership or similar
     laws affecting the rights of creditors generally.

     (b)  None of the execution, delivery or performance of this Agreement does
     or will, after the giving of notice, lapse of time or otherwise, (i) result
     in any violation of or be in conflict with or constitute a default under
     any term or provision of the organizational documents of any of the SOCO
     Entities, or any term or provision of any judgment, decree, order, statute,
     injunction, rule or regulation applicable to any of the SOCO Entities or of
     any material note, bond, mortgage, indenture, lease, license, franchise,
     agreement or other instrument or obligation to which any of the SOCO
     Entities is bound; (ii) result in the creation of any encumbrance, option
     or other third party right upon SOCO Shares, the securities of the
     Surviving Corporation or any of the properties or assets of any of the SOCO
     Entities pursuant to any such term or provision; or (iii) constitute a
     material default under or give any party the right to accelerate, amend or
     modify, terminate, abandon or refuse to perform or comply with, any
     material contract, agreement, arrangement, commitment or plan to which any
     of the SOCO Entities is a party, or by which any of the SOCO Entities or
     any of their rights, properties or assets may be subject or bound.

                                      28
<PAGE>
 
      SECTION 6.4  CONSENTS AND APPROVALS.  No consent, waiver, approval or
authorization of, or declaration, designation, filing, registration or
qualification with, any Governmental Entity or any third party, is required to
be made or obtained by any of the SOCO Entities in connection with the
execution, delivery and performance of this Agreement or to preserve any
material rights and benefits enjoyed by any of the SOCO Entities on the date
hereof following the consummation of the transactions contemplated by this
Agreement except (a) those that have already been obtained or (b) those
specifically contemplated by this Agreement.

      SECTION 6.5  VIOLATIONS OF LAWS, PERMITS, ETC.

     (a)  None of the SOCO Entities is in violation of any term or provision of
     its organizational documents.  None of the SOCO Entities is in violation of
     any term or provision of any judgment, decree, order, statute, injunction,
     rule, ordinance or regulation applicable to it, or of any agreement or
     instrument applicable to such entity where the violation thereof would
     result in a Material Adverse Effect.

     (b)  Each of the SOCO Entities holds and has maintained in full force and
     effect all certificates, licenses and permits material to the conduct of
     its business, and has not received any notification that any revocation or
     limitation thereof is threatened or pending where such revocation or
     limitation would result in a Material Adverse Effect.

      SECTION 6.6  SOCO FINANCIAL STATEMENTS.

     (a)  In all material respects the SOCO Financial Statements give a true and
     fair view of the state of affairs of SOCO as of the dates thereof and the
     results of its operations for the respective periods ended on such dates,
     all in conformity with GAAP consistently applied, except that the 30 June
     1997 unaudited interim financial statements do not contain footnotes and
     are subject to normal, recurring year-end adjustments (which will not,
     individually or in the aggregate, have a Material Adverse Effect).

     (b)  The SOCO Financial Statements were prepared from the books and records
     of SOCO.

      SECTION 6.7  NO UNDISCLOSED LIABILITIES, ETC.  SOCO has no material
liabilities or obligations, whether direct, indirect, absolute or contingent
(including, without limitation, liabilities as guarantor or otherwise with
respect to obligations of others), except (a) liabilities that are fully
reflected on or reserved against on the latest balance sheet of such entity
included in the SOCO Financial Statements or (b) liabilities incurred in the
ordinary course of business since the date of the latest balance sheet included
in the SOCO Financial Statements that are consistent with past practice.

      SECTION 6.8  ABSENCE OF CERTAIN CHANGES.  Since 30 June 1997, SOCO has
not:

     (a)  Suffered any change that would result in a Material Adverse Effect;

     (b)  Adopted or made any change in any pension, retirement, profitsharing
     or other employee benefit plan or arrangement;

                                      29
<PAGE>
 
     (c) Borrowed or agreed to borrow any money or incurred, assumed or become
     subject to, whether directly or by way of guarantee or otherwise, another
     material obligation or liability for borrowed money, whether absolute or
     contingent;

     (d)(i) Issued, purchased or redeemed any of its capital securities or any
     option, warrant or right to purchase any of the same; or (ii) authorized,
     declared or made any dividends, distributions of earnings or capital on, or
     splits or any other reclassification of its equity securities;

     (e) Mortgaged, pledged or subjected to any encumbrance, option or other
     third party right any material portion of its assets, tangible or
     intangible, having a value in excess of $250,000 in the aggregate;

     (f) Acquired or disposed of, or entered into any agreement to acquire or
     dispose of, any material assets or properties, other than oil and gas
     production in the ordinary course of business, or other assets having a
     value in excess of $250,000 in the aggregate;

     (g)  Increased the salaries, compensation, pension or other benefits
     payable, or paid any bonuses, to its officers and directors or their
     Affiliates;

     (h)  Forgiven or canceled any debts or claims or waived any rights against
     any officer or director of the SOCO Entities or their Affiliates or
     forgiven or canceled any material debts or claims or waived any rights
     against any other person in excess of $250,000 in the aggregate;

     (i) Entered into, terminated or received notice of the termination of any
     commitment, contract, agreement or transaction that is material to any of
     the SOCO Entities; or

     (j) Agreed, either in writing or otherwise, to take any action described in
     this Section 6.8.

      SECTION 6.9  LITIGATION.

     (a) There is no action, proceeding, investigation or inquiry pending or, to
     the knowledge of the SOCO Entities, threatened (i) against or affecting any
     of the SOCO Entities or their assets or ordinary conduct of the business
     that, if determined adversely to the SOCO Entities, would result in a
     Material Adverse Effect or (ii) that questions this Agreement or any action
     contemplated by this Agreement or in connection with the Merger.

     (b) There are no citations, fines or penalties heretofore asserted against
     any of the SOCO Entities or their assets under any federal, state or local
     law relating to air, noise or water pollution or other environmental
     protection matters, or relating to occupational health or safety, of which
     such entity has received notice and that remain unpaid or that could
     otherwise bind the assets of any of the SOCO Entities and that would result
     in a Material Adverse Effect.

                                      30
<PAGE>
 
     (c) SOCO has no knowledge of any state of facts or of the occurrence or
     nonoccurrence of any event or group of related events, that should
     reasonably cause SOCO to determine that there exists any basis for any
     material claim against the SOCO Entities for any of the matters described
     in paragraphs (a) or (b).

      SECTION 6.10  BROKERS, FINDERS AND ADVISORS.  SOCO has not incurred any
liability for any commissions in connection with the transaction contemplated
hereby.

      SECTION 6.11  BOOKS AND RECORDS. The books and records of each of the SOCO
Entities (including, without limitation, the books of account, minute books and
stock record books) are complete and correct in all material respects and have
been maintained in accordance with sound business practices. The minute books of
each of the SOCO Entities contain accurate and complete records in all material
respects of all meetings held of, and corporate action taken by, the
shareholders and the Boards of Directors of the respective entities and no
meetings of or actions by such shareholders or any such Boards of Directors have
been held or taken for which minutes have not been prepared and are not
contained in such minute books. None of the records and written documents
furnished or made available to Territorial's representatives or agents by the
SOCO Entities concerning the SOCO Interests, when considered in context and
together with any relevant or related documents also so furnished or made
available, contain any untrue statement of material fact or omit a material fact
necessary to make any statement therein not misleading.

      SECTION 6.12  PUBLIC UTILITY HOLDING COMPANY.  None of the SOCO Entities
owns or operates any facilities used for the retail distribution of natural or
manufactured gas for heat, light or power, nor does any of the SOCO Entities,
directly or indirectly, own, control or hold with power to vote ten percent
(10%) or more of the outstanding stock of, or exercise direct or indirect
controlling influence over the management or policies of such a company or a
company so controlling such a company.

      SECTION 6.13  EXCHANGE FILINGS.  SOCO has filed all forms, reports and
documents required to be filed with the London Stock Exchange Limited since 14
May 1997.  All of such filings were prepared in accordance with the requirements
of all applicable laws and did not at the time they were filed 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 the
light of the circumstances under which they were made, not misleading.

      SECTION 6.14  DISCLOSURE.  No representation or warranty made by SOCO in
this Agreement (including, without limitation, in the SOCO Disclosure Schedule)
contains any untrue statement of material fact or omits or will omit to state
any material fact necessary to make the statements herein or therein not
misleading in light of the circumstances under which made.

                                      31
<PAGE>
 
                                  ARTICLE VII
                ACTIONS OF TERRITORIAL PRIOR TO THE CLOSING DATE

      SECTION 7.1  AFFIRMATIVE COVENANTS.  Prior to the Closing Date,
Territorial, except as otherwise set forth in Section 7.1 of the Territorial
Disclosure Schedule, covenants that, unless the prior written consent of SOCO is
first obtained, which consent shall not be unreasonably withheld, the
Territorial Entities will: (a) carry on their respective businesses in the
usual, regular and ordinary course in substantially the same manner as
heretofore conducted and use all reasonable efforts to (i) preserve intact their
respective present business organizations, (ii) keep available the services of
their respective present officers and key employees and (iii) preserve their
respective relationships with customers, suppliers and any others having
business dealings with them; and (b) duly comply with all laws applicable to
them and their respective properties, operations, business and employees which
if not complied with would result in a Material Adverse Effect.

      SECTION 7.2  NEGATIVE COVENANTS.  Prior to the  Closing Date, except with
the prior written consent of SOCO, and except as otherwise set forth in Section
7.2 of the Territorial Disclosure Schedule, which consent shall not be
unreasonably withheld, the Territorial Entities will not: (a) do any of the
restricted acts set forth in Section 4.8 hereof, or enter into any agreement of
a nature set forth in Section 4.18 hereof; (b) enter into or permit any of the
Territorial Entities to enter into any transaction other than in the ordinary
course of business; or (c) amend the respective organizational or governing
documents of any of the Territorial Entities.

      SECTION 7.3  CONSENTS.  The Territorial Entities will use their best
efforts to obtain all consents from third parties necessary or appropriate to
effectuate the transactions contemplated by this Agreement.

      SECTION 7.4  ADVICE OF CHANGES.  Territorial will promptly advise SOCO in
writing from time to time prior to the  Closing Date with respect to any matter
hereafter arising and known to it that, if existing or occurring at the date of
this Agreement, would have been required to be set forth or described in the
Territorial Disclosure Schedule or would have resulted in any representation of
Territorial in this Agreement being untrue.

      SECTION 7.5  BEST EFFORTS.  The Territorial Entities will use their best
efforts to cause to be fulfilled those of the conditions to SOCO's and Newco's
obligations to consummate the transactions contemplated by this Agreement that
are dependent upon their actions and to execute and deliver such instruments and
take such other actions as necessary or appropriate in order to carry out the
intent of this Agreement.

      SECTION 7.6  ACCESS TO PROPERTIES AND RECORDS.  From and after the date of
this Agreement through the earlier of the Closing or the termination of this
Agreement, the Territorial Entities shall (a) provide SOCO an identification of
and access to all its books, records and documents, including contracts,
agreements, consents, settlements, maps, revenue and expense information,
production data and geological and geophysical data, (b) afford to SOCO and
their officers, attorneys, accountants and other authorized representatives free
and full access during normal business hours to the offices, properties, books
and records of the Territorial Entities, and (c) cause counsel and 

                                      32
<PAGE>
 
accountants to the Territorial Entities to furnish such additional financial and
operating data and other information as SOCO shall from time to time request in
order that SOCO may have full opportunity to make such investigation as they
shall desire to make of the affairs of the Territorial Entities and their
assets.

      SECTION 7.7  SUPPLY DOCUMENTS, REPORTS, ETC.

     (a)  Territorial shall furnish or make available to SOCO all documents,
     reports and other information and data (including financial
     statements)concerning the Territorial Entities as SOCO may reasonably
     require in connection with any statement, application, or document required
     to be filed with applicable Governmental Entities in connection with the
     transaction contemplated by this Agreement or furnished to any other
     person, firm, corporation or Governmental Entity in connection with this
     Agreement, including, but not limited to the Commission, the Federal Trade
     Commission and the Department of Justice.
 
     (b)  Territorial represents and warrants that all such information shall be
     true, correct, and complete in all material respects and shall not omit any
     material fact required to be stated to make such information not misleading
     in light of the circumstances under which made.

      SECTION 7.8  EMPLOYEES.  Territorial agrees to use all reasonable efforts
to persuade such of the employees, agents, and independent contractors of the
Territorial Entities as SOCO may designate to continue as employees, agents, and
independent contractors of the Territorial Entities after the Closing Date.

      SECTION 7.9  NO SOLICITATION, ETC.  Territorial shall not (and will cause
each of the executive officers and members of its executive management, as
identified in Territorial's Proxy Statement dated April 4, 1997 for its Annual
Meeting of Shareholders (collectively, "Territorial's Executives"), and its
directors, legal and financial advisors and Affiliates not to) directly or
indirectly make, solicit, encourage, initiate or enter into any agreement or
agreement in principle, or announce any intention to do any of the foregoing,
with respect to any offer or proposal to acquire all or a substantial part of
its or its Subsidiaries' business and properties or any of its or its
Subsidiaries' capital stock whether by merger, purchase of assets, tender offer
or otherwise (an "Alternative Transaction"). Territorial shall not (and will
cause each of Territorial's Executives, directors, legal and financial advisors
and Affiliates not to), directly or indirectly, participate in any negotiations
or discussions regarding, or furnish any information with respect to, or
otherwise cooperate in any way in connection with, or assist or participate in,
facilitate or encourage, any effort or attempt to effect or seek to effect, any
Alternative Transaction with or involving any person other than SOCO unless
Territorial shall have received an unsolicited bona fide written offer to effect
an Alternative Transaction which, in the exercise of its fiduciary duty after
consideration of advice from its financial advisors, Territorial's Board of
Directors determines in good faith, after consultation with its financial
advisors, is likely to result in a transaction more favorable to the Territorial
Shareholders from a financial point of view than the transactions contemplated
by this Agreement.  Territorial will promptly communicate to SOCO the terms of
any proposal which it may receive in respect of any such transaction and will
keep SOCO informed as to the status of any actions, including negotiations or
discussions, taken pursuant to the preceding sentence.

                                      33
<PAGE>
 
                                  ARTICLE VIII
         ACTIONS OF SUBSCRIBING SHAREHOLDERS PRIOR TO THE CLOSING DATE

      SECTION 8.1  AFFIRMATIVE COVENANTS.  Prior to the Closing Date, each of
the Subscribing Shareholders covenants that, unless the prior written consent of
SOCO is first obtained, he or it shall: (a)  preserve intact his or its
shareholdings in Territorial; and (b) duly comply with all laws applicable to
him or it and his or its properties, operations, business and employees which if
not complied with would interfere with the consummation of the transactions
contemplated by this Agreement or would result in a Material Adverse Effect
regarding a Territorial Entity or title to the Territorial Shares listed
opposite his or its name on Attachment 1 hereto.

      SECTION 8.2  NEGATIVE COVENANTS.  Prior to the Closing Date, except with
the prior written consent of SOCO, which consent shall not be unreasonably
withheld, and except as otherwise set forth in Section 8.2 of the Subscribing
Shareholders Disclosure Schedule, no Subscribing Shareholder will enter into any
agreement of a nature set forth in Section 5.8 hereof.

      SECTION 8.3  CONSENTS.  Each Subscribing Shareholder shall use his or its
best efforts to obtain all consents from third parties necessary or appropriate
for Territorial and such Subscribing Shareholder to effectuate the transactions
contemplated by this Agreement.

      SECTION 8.4  ADVICE OF CHANGES.  Each Subscribing Shareholder shall
promptly advise SOCO in writing from time to time prior to the Closing Date with
respect to any matter hereafter arising and known to him or it that, if existing
or occurring at the date of this Agreement, would have resulted in any
representation of any Subscribing Shareholder in this Agreement being untrue.

      SECTION 8.5  BEST EFFORTS.  Each Subscribing Shareholder shall use his or
its best efforts to cause to be fulfilled those of the conditions to SOCO's and
Newco's obligations to consummate the transactions contemplated by this
Agreement that are dependent upon his or its actions and to execute and deliver
such instruments and take such other actions as necessary or appropriate in
order to carry out the intent of this Agreement.

      SECTION 8.6  ACCESS TO PROPERTIES AND RECORDS.  From and after the date of
this Agreement through the earlier of the Closing or the termination of this
Agreement, each Subscribing Shareholder shall (a) provide SOCO an identification
of and access to all books, records and documents, including contracts,
agreements, consents and settlements relating to his or its shareholdings in
Territorial, (b) afford to SOCO and their officers, attorneys, accountants and
other authorized representatives free and full access during normal business
hours to such books and records, and (c) cause his or its counsel and
accountants to furnish such additional financial and operating data and other
information as SOCO shall from time to time request in order that SOCO may have
full opportunity to make such investigation as they shall desire to make of the
affairs of such shareholdings.

                                      34
<PAGE>
 
      SECTION 8.7  SUPPLY DOCUMENTS, REPORTS, ETC.

     (a) Each Subscribing Shareholder shall furnish or make available to SOCO
     all documents, reports and other information and data (including financial
     statements)concerning his or its shareholdings in  Territorial as SOCO may
     reasonably require in connection with any statement, application, or
     document required to be filed with applicable Governmental Entities in
     connection with the transaction contemplated by this Agreement or furnished
     to any other person, firm, corporation or Governmental Entity in connection
     with this Agreement, including, but not limited to the Commission, the
     Federal Trade Commission and the Department of Justice.

     (b) Each Subscribing Shareholder represents and warrants that all such
     information as to such Subscribing Shareholder shall be true, correct, and
     complete in all material respects and shall not omit any material fact
     required to be stated to make such information not misleading in light of
     the circumstances under which made.

      SECTION 8.8  NO SOLICITATION, ETC.  No Subscribing Shareholder shall
directly or indirectly make, solicit, encourage, initiate or enter into any
agreement or agreement in principle, or announce any intention to do any of the
foregoing, with respect to any offer or proposal to acquire any or all of his or
its Territorial Shares whether by merger, purchase of assets, tender offer or
otherwise (an "Alternative Transaction").  No Subscribing Shareholder shall
directly or indirectly participate in any negotiations or discussions regarding,
or furnish any information with respect to, or otherwise cooperate in any way in
connection with, or assist or participate in, facilitate or encourage, any
effort or attempt to effect or seek to effect, any Alternative Transaction with
or involving any person other than SOCO.


                                   ARTICLE IX
              ACTIONS OF SOCO AND NEWCO PRIOR TO THE CLOSING DATE

      SECTION 9.1  AFFIRMATIVE COVENANTS.  Prior to the Closing Date, SOCO,
except for matters not materially affecting  in an adverse manner the ability of
SOCO to effect the transaction contemplated by this Agreement and as otherwise
set forth in Section 9.1 of the SOCO Disclosure Schedule, covenants that, unless
the prior written consent of Territorial is first obtained, which consent shall
not be unreasonably withheld, the SOCO Entities will: (a) carry on their
respective businesses in the usual, regular and ordinary course in substantially
the same manner as heretofore conducted and use all reasonable efforts to (i)
preserve intact their respective present business organizations, (ii) keep
available the services of their respective present officers and key employees
and (iii) preserve their respective relationships with customers, suppliers and
any others having business dealings with them; and  (b) duly comply with all
laws applicable to them and their respective properties, operations, business
and employees.

      SECTION 9.2  NEGATIVE COVENANTS.  Prior to the Closing Date, except for
matters not materially affecting in an adverse manner the ability of SOCO to
effect the transaction contemplated by this Agreement and as otherwise set forth
in Section 9.2 of the SOCO Disclosure Schedule, the SOCO Entities will not do
any of the restricted acts set forth in Section 6.8 hereof, unless the prior
written consent of Territorial is first obtained, which consent shall not be
unreasonably withheld.

                                      35
<PAGE>
 
      SECTION 9.3  CONSENTS.  The SOCO Entities will use their best efforts to
obtain all consents from third parties necessary or appropriate to effectuate
the transactions contemplated by this Agreement.

      SECTION 9.4  ADVICE OF CHANGES.  SOCO will promptly advise Territorial in
writing from time to time prior to the Closing Date with respect to any matter
hereafter arising and known to it that, if existing or occurring at the date of
this Agreement, would have been required to be set forth or described in the
SOCO Disclosure Schedule or would have resulted in any representation of SOCO in
this Agreement being untrue.

      SECTION 9.5  BEST EFFORTS.  The SOCO Entities will use their best efforts
to cause to be fulfilled those of the conditions to Territorial's obligations to
consummate the transactions contemplated by this Agreement that are dependent
upon their actions and to execute and deliver such instruments and take such
other actions as necessary or appropriate in order to carry out the intent of
this Agreement.

      SECTION 9.6  ADDITIONAL INFORMATION.  SOCO shall use its best efforts to
comply with the informational requirements of Regulation D concerning the
issuance of the SOCO Shares as a result of the Merger.

      SECTION 9.7  SUPPLY DOCUMENTS, REPORTS, ETC.

     (a)  SOCO shall furnish or make available to Territorial all documents,
     reports and other information and data (including financial statements)
     concerning the SOCO Entities as Territorial may reasonably require in
     connection with any statement, application, or document required to be
     filed with applicable Governmental Entities in connection with the
     transaction contemplated by this Agreement or furnished to any other
     person, firm, corporation or Governmental Entity in connection with this
     Agreement, including, but not limited to the Commission, the Federal Trade
     Commission and the Department of Justice.

     (b)  SOCO represents and warrants that all such information shall be true,
     correct, and complete in all material respects and shall not omit any
     material fact required to be stated to make such information not misleading
     in light of the circumstances under which made.

 
                                   ARTICLE X
                  CONDITIONS TO SOCO'S OR NEWCO'S OBLIGATIONS

     Each and every obligation of SOCO or Newco under this Agreement to be
performed on or before the Closing Date is, at the option of SOCO, subject to
the satisfaction on or before the Closing Date of each of the following
conditions:

     (a)  The Territorial Shareholders shall have approved the Reverse Split,
     and the Reverse Split shall have been effectuated in all respects by
     Territorial.

                                      36
<PAGE>
 
     (b) At least 90 days shall have passed following the date on which the
     Commission received the certification on Form 15 as provided in Section
     2.3, and Territorial's obligations to file reports prescribed under Section
     13(a) of the Exchange Act shall have terminated in all respects.

     (c)  The Territorial Shareholders shall have approved the Merger.

     (d)(i)  All of the terms, covenants and conditions of this Agreement to be
     complied with or performed by Territorial and the Subscribing Shareholders
     at or before the Closing Date shall have been duly complied with and
     performed in all material respects, (ii) the representations and warranties
     of Territorial set forth in Article IV, as modified by the statements
     contained in the Territorial Disclosure Schedule, shall be true in all
     material respects on and as of the Closing Date with the same force and
     effect as if such representations and warranties had been made on and as of
     the Closing Date (but this provision shall not mean that representations
     and warranties relating to a specific date, such as Section 4.6(a), shall
     relate to any other date), (iii) SOCO shall have received a certificate to
     such effect from an officer of Territorial, and (iv) the representations
     and warranties of the Subscribing Shareholders set forth in Article V, as
     modified by the statements contained in the Subscribing Shareholders
     Disclosure Schedule, shall be true in all material respects on and as of
     the Closing Date with the same force and effect as if such representations
     and warranties had been made on and as of the Closing Date.  Whether the
     conditions in subparagraphs (i), (ii) and (iv) above have been satisfied
     shall be determined without regard to any materiality qualifications or
     provisions contained in any such covenants, representations or warranties.

     (e)  All consents, waivers, approvals, licenses, authorizations of, or
     filings or declarations with third parties or Governmental Entities
     required to be obtained by the Territorial Entities in order to permit the
     transactions contemplated by this Agreement to be consummated in accordance
     with governmental laws, rules, regulations and agreements shall have been
     obtained; the Commission shall have taken no enforcement action and shall
     have not given notice of its consideration or intention of taking any
     enforcement action against Territorial or any Subscribing Shareholder; no
     other action, suit, proceeding or investigation with respect to Territorial
     shall have been commenced by the Commission; and the certification on Form
     15 filed as provided in Section 2.3 hereof shall not have been withdrawn or
     denied by the Commission.

     (f)  Territorial shall have delivered, or caused to be delivered to SOCO a
     Lock-Up Agreement, executed by each Territorial Shareholder (after giving
     effect to the Reverse Split), regarding his or its investment in the SOCO
     Shares.

     (g) No Excessive Dissent has occurred.

     (h)  All outstanding options or other rights to purchase or acquire
     Territorial Shares shall have terminated without any obligation by either
     Territorial or SOCO.

                                      37
<PAGE>
 
     (i)  The Territorial Entities shall have furnished such certificates to
     evidence compliance with the conditions set forth in this Article, as may
     be reasonably requested by SOCO or its counsel.

     (j)  There shall not have been any material loss resulting from destruction
     due to acts of God, fire, explosion or other casualty which is not
     reimbursable in all material respects under policies of insurance
     maintained by or for the benefit of the Territorial Entities.

     (k)  No material information or data provided or made available to SOCO by
     or on behalf of Territorial shall be incorrect in any material respect.


                                   ARTICLE XI
    CONDITIONS TO TERRITORIAL'S OR THE SUBSCRIBING SHAREHOLDERS' OBLIGATIONS

     Each and every obligation of Territorial or the Subscribing Shareholders
under this Agreement to be performed on the Closing Date is, at the option of
Territorial, subject to the satisfaction on or before the Closing Date, of each
of the following conditions:

     (a) (i)  All of the terms, covenants and conditions of this Agreement to be
     complied with or performed by SOCO and Newco at or before the Closing Date
     shall have been duly complied with and performed in all material respects,
     (ii) the representations and warranties of SOCO and Newco set forth in
     Article 6, as modified by the statements contained in the SOCO Disclosure
     Schedule, shall be true in all material respects on and as of the Closing
     Date with the same force and effect as if such representations and
     warranties had been made on and as of the Closing Date (but this provision
     shall not mean that representations and warranties relating to a specific
     date, such as Section 6.6(a), shall relate to any other date), and (iii)
     Territorial shall have received a certificate to such effect from an
     officer of each of SOCO and Newco at the Closing.  Whether the conditions
     in subparagraphs (i) and (ii) above have been satisfied shall be determined
     without regard to any materiality qualifications or provisions contained in
     any such covenants, representations or warranties.

     (b)  All consents, waivers, approvals, licenses, authorizations of, or
     filings or declarations with third parties or Governmental Entities
     required to be obtained by SOCO and Newco in order to permit the
     transactions contemplated by this Agreement to be consummated in accordance
     with governmental laws, rules, regulations and agreements shall have been
     obtained.

     (c)  SOCO and Newco shall have furnished such certificates of its officers
     and others to evidence compliance with the conditions set forth in this
     Article, as may be reasonably requested by Territorial or its counsel.

     (d)  There shall not have been any material loss resulting from destruction
     of the SOCO Interests due to acts of God, fire, explosion or other casualty
     which is not reimbursable in all 

                                      38
<PAGE>
 
     material respects under policies of insurance maintained by or for the
     benefit of the SOCO Entities.

     (e)  No material information or data provided or made available to
     Territorial by or on behalf of SOCO shall be incorrect in any material
     respect.


                                  ARTICLE XII
                             ADDITIONAL AGREEMENTS

      SECTION 12.1  CONFIDENTIALITY.  The parties hereto shall, and shall cause
their officers, directors, employees and authorized representatives to, hold in
confidence all, and not to use or to disclose to others any, nonpublic
information received by them from another party hereto in connection with the
transactions contemplated by this Agreement; provided, however, the foregoing
shall not restrict necessary disclosures in compliance with requirements of any
law, governmental order or regulation, so long as the parties always use their
respective best efforts to consult with each other prior to making any such
disclosure.

      SECTION 12.2  FURTHER ASSURANCES.  After Closing, the parties shall
execute, acknowledge and deliver or cause to be executed, acknowledged and
delivered such instruments and take such other action including payment of
monies as may be necessary or advisable to carry out their obligations under
this Agreement and under any document, certificate or other instrument delivered
pursuant hereto or required by law.  If at any time subsequent to the Closing,
any party comes into possession of money or property belonging to another party,
such money or property shall be promptly turned over to the party entitled
thereto.

      SECTION 12.3   RESIGNATIONS. Territorial shall cause all employees,
officers and directors of the Territorial Entities to resign as employees,
officers and directors as of Closing.


                                  ARTICLE XIII
                       TERMINATION, WAIVER AND AMENDMENT

      SECTION 13.1  TERMINATION.  This Agreement and the transactions
contemplated herein may be terminated and abandoned at any time on or prior to
the Closing Date:

     (a)  By mutual consent of Territorial and SOCO; or

     (b)  By SOCO if:

          (i)  Consummation of the transactions contemplated by this Agreement
          would violate any nonappealable final order, decree or judgment of any
          court or governmental body having competent jurisdiction; or

                                      39
<PAGE>
 
          (ii) Territorial has purchased fractional shares as a result of the
          Reverse Split at a price per share greater than the Reverse Split
          Consideration; or

          (iii) an Excessive Dissent has occurred; or

          (iv) the representations and warranties of the Subscribing
          Shareholders set forth in Article V, as modified by the statements
          contained in the Subscribing Shareholders Disclosure Schedule, shall
          not be true in all material respects on and as of the Closing Date
          with the same force and effect as if such representations and
          warranties had been made on and as of the Closing Date; or

          (v) the representations and warranties of Territorial set forth in
          Article IV, as modified by the statements contained in the Territorial
          Disclosure Schedule, shall not be true in all material respects on and
          as of the Closing Date with the same force and effect as if such
          representations and warranties had been made on and as of the Closing
          Date; or

          (vi) (A) any corporation, partnership, person, trust, association,
          entity or group (as defined in Section 13(d)(3) of the Exchange Act)
          (collectively "Person"), other than the Subscribing Shareholders, SOCO
          or Newco, shall have acquired, or shall have been granted any option
          or right, conditional or otherwise, to acquire, beneficial ownership
          of 20% or more of the Territorial Shares, or (B) any new group shall
          have been formed which beneficially owns 20% or more of the
          Territorial Shares; or

          (vii) Territorial shall have entered into an agreement with a third
          party with respect to any acquisition or purchase of all or a
          substantial portion of the assets of, or any equity interest in,
          Territorial or any Territorial Subsidiary or any business combination
          with Territorial or any Territorial Subsidiary by such third party; or

          (viii)  the Board of Directors of Territorial shall have withdrawn,
          modified or amended in any manner adverse to SOCO its approval of or
          recommendation in favor of the Merger or the Reverse Split.

     (c)  By Territorial or by Subscribing Shareholders owning a Controlling
     Interest if:

          (i)  Consummation of the transactions contemplated by this Agreement
          would violate any nonappealable final order, decree or judgment of any
          court or governmental body having competent jurisdiction; or

          (ii)  Territorial or Territorial Shareholders receives an unsolicited
          bona fide written offer to effect an Alternative Transaction which
          Territorial's Board of Directors determines in good faith, after
          consultation with its financial advisers, is likely to result in a
          transaction more favorable to the holders of Territorial Shares from a
          financial point of view than the transactions contemplated by this
          Agreement; or

                                      40
<PAGE>
 
          (iii) the representations and warranties of SOCO and Newco set forth
          in Article VI, as modified by the statements contained in the SOCO
          Disclosure Schedule, shall not be true in all material respects on and
          as of the Closing Date with the same force and effect as if such
          representations and warranties had been made on and as of the Closing
          Date.

     (d)  By either SOCO or Territorial if the Closing Date does not occur on or
     before September 30, 1998 (or such later date as may be mutually agreed
     upon by the parties hereto), and such party shall have complied with the
     provisions of Section 7.5 or Section 9.5, as the case may be and, in
     Territorial's case, the Subscribing Shareholders shall have complied with
     the provisions of Section 8.5; or

     (e)  By either SOCO or Territorial, if any of this Agreement, the Merger or
     the Reverse Split shall fail to be approved and adopted by the affirmative
     vote of the Territorial Shareholders required under the CBCA or
     Territorial's Articles of Incorporation, and such party shall have complied
     with its agreements set forth in Article II and in Territorial's case, the
     Subscribing Shareholders shall have complied with the provisions of Section
     8.5 and their agreements set forth in Article II.

      SECTION 13.2  MANNER OF EXERCISE.  In the event of termination and
abandonment by SOCO or Territorial, or both, authorized by Section 13.1, written
notice thereof shall forthwith be given to the other parties and this Agreement
shall terminate and the transactions contemplated hereunder shall be abandoned
without further action by the parties.

      SECTION 13.3  EFFECT OF TERMINATION.

     (a) In the event of the termination and abandonment pursuant to Section
     13.1, this Agreement shall become void and have no effect, without any
     liability on the part of any of the parties or their directors or officers
     or Territorial Shareholders in respect of this Agreement and the
     transactions contemplated hereby, except (i) as set forth in Section 12.1,
     Section 13.1, this Section 13.3, Section 15.1 and Section 15.2 hereof and
     (ii) nothing herein shall relieve any party from liability for willful
     breach hereof.

     (b) If this Agreement is terminated by (i) SOCO pursuant to Section
     13.1(b)(iv), (v), (vi), (vii) or (viii), and neither SOCO nor Newco is in
     material breach of its material representations, warranties, covenants and
     agreements under this Agreement, or (ii) Territorial pursuant to Section
     13.1(c)(ii), Territorial shall pay to SOCO a  termination fee in same day
     funds of $250,000 within one business day following termination of this
     Agreement, and thereafter shall reimburse SOCO for its reasonable
     professional fees and other out of pocket expenses incurred with respect to
     the transactions contemplated by this Agreement within 30 days following
     presentment of reasonable documentation thereof to Territorial by SOCO.

     (c) If this Agreement is terminated by Territorial pursuant to Section
     13.1(c)(iii), and neither Territorial nor any of the Subscribing
     Shareholders is in material breach of its material 

                                      41
<PAGE>
 
     representations, warranties, covenants and agreements under this Agreement,
     SOCO shall pay to Territorial a termination fee in same day funds of
     $250,000 within one business day following termination of this Agreement,
     and thereafter shall reimburse Territorial for its reasonable professional
     fees and other out of pocket expenses incurred with respect to the
     transactions contemplated by this Agreement (excluding cash payments to its
     former shareholders pursuant to the Reverse Split) within 30 days following
     presentment of reasonable documentation thereof to SOCO by Territorial.


                                  ARTICLE XIV
                  LIABILITY FOR WARRANTIES AND REPRESENTATIONS

      SECTION 14.1  LIMITATION. A Party or Parties expressing any warranties or
representations under Article IV, V or VI is hereinafter referred to as a
"Warrantying Party" or, if appropriate, "Warrantying Parties."  Each Party or
Parties to whom one or more warranties or representations are expressed under
Article IV, V or VI is hereinafter referred to as a "Warranted Party" or if
appropriate, "Warranted Parties."  The Warrantying Parties shall not have any
liability to the Warranted Parties by reason of any Adverse Consequences until a
Warranted Party has suffered Adverse Consequences in excess of a $250,000
aggregate deductible (after which point the Warrantying Parties will be
obligated to the Warranted Parties for all Adverse Consequences, including such
deductible).

      SECTION 14.2   THIRD PARTY CLAIM PROCEDURE.  In the event of any claim
asserted against a Warranted Party by a third party which actually results in or
could potentially result in Adverse Consequences to the Warranted Party ("Third
Party Claim"):

          (a) Each Warranted Party shall promptly notify each Warrantying Party
     in writing with respect to any matter which may give rise to a claim under
     this Article XIV; provided, however, that no delay on the part of a
     Warranted Party in notifying a Warrantying Party shall relieve the
     Warrantying Party from any obligation hereunder unless (and then solely to
     the extent) the Warrantying Party thereby is prejudiced.

          (b) Any Warrantying Party will have the right to assume the defense of
     the Third Party Claim with counsel of its choice reasonably satisfactory to
     the Warranted Party at any time within 15 days after the Warranted Party
     has given notice of such claim; provided, however, that the Warrantying
     Party must conduct the defense of such claim actively and diligently
     thereafter in order to preserve its rights in this regard; and provided
     further that the Warranted Party may retain separate co-counsel at its sole
     cost and expense and participate in the defense of the such claim.

          (c) So long as the Warrantying Party has assumed and is conducting the
     defense of the claim for indemnification in accordance with Section 14.2(b)
     above, (i) the Warrantying Party will not consent to the entry of any
     judgment or enter into any settlement with respect to the Third Party Claim
     without the prior written consent of the Warranted Party (not to be
     withheld unreasonably) unless the judgment or proposed settlement involves
     only the 

                                      42
<PAGE>
 
     payment of money damages by one or more of the Warrantying Parties
     and does not impose an injunction or other equitable relief upon the
     Warranted Party and (ii) the Warranted Party will not consent to the entry
     of any judgment or enter into any settlement with respect to such claim
     without the prior written consent of the Warrantying Party (not to be
     withheld unreasonably).

          (d) In the event none of the Warrantying Parties assumes and conducts
     the defense of the claim for indemnification in accordance with Section
     14.2(b) above, however, (i) the Warranted Party may defend against, and
     consent to the entry of any judgment or enter into any settlement with
     respect to, such claim in any manner it reasonably may deem appropriate
     (and the Warranted Party need not consult with, or obtain any consent from,
     any Warrantying Party in connection therewith) and (ii) the Warrantying
     Parties will remain responsible for any Adverse Consequences the Warranted
     Party may suffer resulting from, arising out of, relating to, in the nature
     of, or caused by such claim to the fullest extent provided in this Article
     XIV.


                                   ARTICLE XV
                                 MISCELLANEOUS

      SECTION 15.1  SURVIVAL.  The representations, warranties, covenants and
agreements of the parties to this Agreement shall survive for a period of two
(2) years following the Closing.

      SECTION 15.2  EXPENSES.  Except as otherwise provided herein, the parties
shall each pay their own expenses and costs in connection with this Agreement
and the transactions contemplated hereby.

      SECTION 15.3  PRESS RELEASES.  No party shall make any public announcement
or press release with respect to this transaction without first consulting with
the other parties and giving such parties the opportunity to review and comment
thereon, except as otherwise required by law or regulatory authority.

      SECTION 15.4  BINDING EFFECT.  This Agreement and all of the provisions
hereof shall be binding upon and inure to the benefit of the parties hereto and
their respective successors and permitted assigns. Neither this Agreement nor
any of the rights, interests or obligations hereunder shall be assigned by any
party without the prior written consent of the others.  Nothing contained
herein, express or implied, is intended to confer on any person other than the
parties hereto or their respective successors and permitted assigns, any rights,
remedies, obligations or liabilities under or by reason of this Agreement.

      SECTION 15.5  SEVERABILITY.  Any provision of this Agreement that is
prohibited or unenforceable in any jurisdiction shall, in such jurisdiction, be
ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

                                      43
<PAGE>
 
      SECTION 15.6  NOTICES.  Any notice, request, instructions or other
document to be given hereunder to any party shall be in writing, sent by
facsimile transmission or delivered personally or by courier or sent by
certified mail, postage prepaid, as follows:

If to Territorial:
 
     Territorial Resources, Inc.
     Suite 1345
     734 7 Avenue SW
     Calgary, Alberta
     Canada T2P 3P8
     Attn: Dan Mercier
     FAX: (403) 233-7354

With a copy to:

     Vinson & Elkins, LLP
     2300 First City Tower
     1001 Fannin Street
     Houston, Texas 77002
     Attn: Robert H. Whilden
     FAX: (713) 615-5160

If to SOCO or Newco:

     SOCO International plc
     Swan House
     32/33 Old Bond Street
     London W1X 3AD
     Attn: Roger Cagle, Chief Financial Officer
     FAX: 011-44-171-399-3333

With a copy to:

     Woodard Hall & Primm, P.C.
     7100 Chase Tower
     Houston, Texas 77002
     Attn: Ralph K. Miller, Jr.
     FAX: (713) 221-1802

and to:

     Ashurst Morris Crisp
     Broadwalk House
     5 Appold Street

                                      44
<PAGE>
 
     London EC2A 2HA
     Attn: Steven Fox
     FAX: 011-44-171-972-7990

If to the Subscribing Shareholders:

     To the addresses indicated in Attachment 1.

Any party may change its address for purposes of this Section by giving written
notice of such change of address to the other parties in the manner herein
provided for giving notice.  Any notice or communication hereunder shall be
deemed to have been given when (i) deposited in the United States mail, if by
certified mail, and (ii) received, if delivered personally or by courier or
facsimile transmission.

      SECTION 15.7  ENTIRE AGREEMENT.  This Agreement (including the instruments
between the parties referred to herein and any waivers delivered pursuant
hereto) constitutes the entire agreement among the parties and supersedes all
other prior agreements and understandings, both written and oral, among the
parties, or any of them, with respect to the subject matter hereof. The
Exhibits, Attachments and Schedules are a part of this Agreement as if fully set
forth herein.  All references to articles, sections, subsections, paragraphs,
clauses, Exhibits, Attachments and Schedules shall be deemed references to such
part of this Agreement, unless the context shall otherwise require.

      SECTION 15.8  AMENDMENTS; WAIVERS.  No supplement, modification, or
amendment of this Agreement or waiver of any provision of this Agreement will be
binding unless executed in writing by, or on behalf of, all parties to this
Agreement.  No waiver of any of the provisions of this Agreement will be deemed
or will constitute a waiver of any other provision of this Agreement (regardless
of whether similar), nor will any such waiver constitute a continuing waiver
unless otherwise expressly provided.

      SECTION 15.9  HEADINGS.  Descriptive headings contained herein are for
convenience of reference only and shall not affect the meaning or interpretation
hereof.

      SECTION 15.10  COUNTERPARTS.  This Agreement may be executed in any number
of counterparts, each of which shall be deemed to be an original but all of
which together shall constitute but one agreement.

      SECTION 15.11  SPECIFIC PERFORMANCE.  The parties hereto agree that
irreparable damage would occur if any of the provisions of this Agreement were
not performed in accordance with their specific terms or were otherwise
breached.  It is accordingly agreed that the parties shall be entitled to an
injunction or injunctions to prevent breaches of this Agreement and to enforce
specifically the terms and provision hereof in any court of the United States or
any state having jurisdiction, in addition to any other remedy to which they are
entitled at law or in equity.

      SECTION 15.12  GOVERNING LAW.  THIS AGREEMENT AND THE LEGAL RELATIONS
AMONG THE PARTIES HERETO SHALL BE GOVERNED BY AND 

                                      45
<PAGE>
 
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF COLORADO
APPLICABLE TO CONTRACTS MADE AND TO BE PERFORMED IN THAT STATE, WITHOUT REGARD
TO CONFLICT OF LAWS PRINCIPLES.

      SECTION 15.13  SCHEDULES.  Any item disclosed by any party in the its
Disclosure Schedule for one purpose and in response to a specific section of
this Agreement shall not be deemed disclosed for any other purpose and in
response to any other section of the Agreement unless specifically so stated.

      SECTION 15.14  TIME OF ESSENCE.  Time is of the essence of the parties'
obligations to consummate the transactions contemplated by this Agreement on the
Closing Date.

      SECTION 15.15  BEST EFFORTS.  No provision of this Agreement calling for a
party to use its best efforts or reasonable efforts shall be construed so as to
require such party to incur out-of-pocket expenditures other than expenditures
normally incurred in transactions similar to the Merger or to take any step that
would not be commercially reasonable, in light of all of the circumstances.

      SECTION 15.16  ACKNOWLEDGMENT BY SUBSCRIBING SHAREHOLDERS OF LEGAL
REPRESENTATION. Each of the Subscribing Shareholders acknowledge that Woodard,
Hall & Primm, P.C. represents SOCO and Newco and Vinson & Elkins L.L.P.
represents Territorial, and that neither Woodard, Hall & Primm, P.C. nor Vinson
& Elkins L.L.P. represents any of the Subscribing Shareholders in connection
with the transactions contemplated by this Agreement.

      SECTION 15.17  MATERIAL ADVERSE EFFECT.  Notwithstanding anything to the
contrary herein, any change, effect, event or condition which adversely affects
the oil and gas industry generally, such as a decline in the price of oil or
natural gas generally, shall not be considered in determining whether a Material
Adverse Effect has occurred with respect to Territorial or SOCO.

     EXECUTED as of the day and year first above written.

     SOCO:
     SOCO INTERNATIONAL PLC



     By: Roger Cagle
     Chief Financial Officer
 
     NEWCO:
     SOCO RESOURCES (COLORADO),  INC.



     By: Roger Cagle
     President

                                      46
<PAGE>
 
     TERRITORIAL:
     TERRITORIAL RESOURCES, INC.



     By: Daniel A. Mercier
     Chairman of the Board and
     Chief Executive Officer
                                      47
<PAGE>
 
                    [SUBSCRIBING SHAREHOLDER SIGNATURE PAGE]



Subscribing Shareholders:                     Subscribing Shareholders:

Asia Energy Ltd.                              119383 Canada, Inc.


By:                                           By:                       
   -------------------------                     --------------------------
Name: Daniel A.  Mercier                      Name: Lamont C. Tolley
Title:                                        Title:                    
      ----------------------                        -----------------------



- ----------------------------------            ------------------------------
Name: Richard A. N. Bonnycastle               Name: Jimmy M.  McCarroll



- ----------------------------------            ------------------------------
Name: Donald L. Oliver                        Name: Daniel A. Mercier



- ----------------------------------            ------------------------------
Name: William C. Penttila                     Name: Dennis M. Buck



- ----------------------------------            ------------------------------
Name: Brian A. Lingard                        Name: Edward T. Story

                                      48
<PAGE>
 
                                  ATTACHMENT 1
                            SUBSCRIBING SHAREHOLDERS

                                        Number of Territorial Shares Owned
Name and Address                              At the Date of Agreement
- ----------------                              ------------------------

1.  Asia Energy Ltd.                              2,406,167 shares
     1345  734 7 Avenue SW
     Calgary, Alberta T2P 3P8

2.  Daniel A. Mercier                               122,500 shares
     1345 734 7 Avenue SW
     Calgary, Alberta T2P 3P8

3. Richard A. N. Bonnycastle                         41,667 shares
    Cavendish Investing Ltd.
    4615 400 3 Avenue SW
    Calgary, Alberta T2P 3P8

4. Jimmy M. McCarroll                               550,000 shares
    1030 Townplace
     Houston, TX 77057-1942

5. Donald L. Oliver                                 366,613 shares
    Forest Oil Company
    1600 Broadway, Suite 2200
    Denver, CO 80202

6. 119383 Canada, Inc.                               83,334 shares
    c/o Starvest Exploration Ltd.
    1000 635 8 Avenue SW
    Calgary, Alberta T2P 3P8

                                      49
<PAGE>
 
7. William C. Penttila                              629,921 shares
   Exploration Associates, Inc.
   450 N. Sam Houston Parkway E
   Suite 140
   Houston, TX 77060

8.  Dennis M. Buck                                  629,921 shares
    Exploration Associates, Inc.
    450 N. Sam Houston Parkway E
    Suite 140
    Houston, TX 77060

9.  Brian A. Lingard                              1,127,046 shares
    401 Louisiana
    #206
    Houston, Texas 77002

10. Edward T. Story                                 471,061 shares
    SOCO International plc
    622 High Street
    Comfort, TX 78013


                                      50
<PAGE>
 
                                   EXHIBIT A


                               ARTICLES OF MERGER


     Pursuant to the provisions of Section 7-111-105 of the Colorado Business
Corporation Act, Territorial Resources, Inc. and SOCO Resources (Colorado), Inc.
adopt the following Articles of Merger:


     1.   The Reorganization Agreement and Plan of Merger (the "Plan") that has
          been approved by each of the parties to the merger in the manner
          prescribed by their constituent documents and the Colorado Business
          Corporation Act is set forth in the attached Exhibit A, and
          incorporated by reference into these Articles as if fully set forth
          here.

     2.   The number of votes cast for the Plan by each voting group entitled to
          vote separately on the merger was sufficient for approval by that
          voting group.



     Dated:    ________________________


                                             Territorial Resources, Inc. 
                                                                               
                                                                               
                                             By: _________________________     
                                             Name:________________________     
                                             Title:_______________________     
                                                                               
                                                                               
                                             SOCO Resources (Colorado), Inc.   
                                                                               
                                                                               
                                                                               
                                             By: _________________________     
                                             Name:________________________     
                                             Title:_______________________      
<PAGE>
 
                                   EXHIBIT B

                             SOCO INTERNATIONAL PLC

                LOCK-UP AGREEMENT AND INVESTOR QUESTIONNAIRE OF

                               ______[Name]______

          _____[Name]_____, a_[Entity][Individual]__(the "undersigned"),
understands that:

A.   The undersigned currently owns _______ shares (the "Territorial Shares") of
     the Common Capital Stock of TERRITORIAL RESOURCES, INC., corporation formed
     under the laws of the State of Colorado ("Territorial").

B.   SOCO INTERNATIONAL PLC, a public limited company formed under the laws of
     England and Wales ("SOCO"), wishes to acquire Territorial by a merger (the
     "Merger") to be effected in accordance with the terms of that certain
     Reorganization Agreement and Plan of Merger dated January __, 1998 by and
     among SOCO, Territorial and certain Territorial shareholders (the "Merger
     Agreement").

C.   Pursuant to the Merger Agreement, each of the Territorial Shares held by
     the Subscriber would be converted into the right to receive a number of
     shares of the Common Stock (the "SOCO Shares") of SOCO equal to the
     quotient of: $1.40 USD expressed in Pounds Sterling at the prevailing USD-
     to-Pounds Sterling exchange rate as of the close of business on the day
     immediately preceding the Merger Effective Date, divided by the SOCO Market
     Price.

D.   The tax effects of the Merger on the undersigned may vary depending on its
     place of organization or tax residence, its adjusted tax basis in the
     Territorial Shares and how many shares of Territorial stock are held by
     persons who will properly exercise their rights to dissent from the Merger
     and receive payment for their shares of Territorial stock.

     For good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged by the undersigned and SOCO, the undersigned and SOCO
agree as follows:

1.   Acceptance.  Subject to the terms and conditions hereof ("this Agreement"),
     the undersigned hereby irrevocably agrees to accept the SOCO Shares
     pursuant to the terms and conditions of the Merger Agreement.

2.   Representations and Warranties of the Undersigned.  The undersigned hereby
     represents and warrants to and agrees with SOCO as follows:

     (a) The undersigned has been furnished with a copy of the Merger Agreement,
     Territorial's Annual Report on Form 10-KSB for the fiscal year ended March
     31, 1997, Territorial's Quarterly Reports on Form 10-QSB for the quarterly
     periods ended June 30, 1997 and September 30, 1997, SOCO's Listing
     Particulars dated 14 May 1997 and SOCO's

<PAGE>
 
     Interim Report dated 30 June 1997 (collectively, the "Offering Materials").
     The undersigned has received and read the Offering Materials and is
     familiar with the terms and provisions thereof. The undersigned is a
     knowledgeable and sophisticated investor, capable of evaluating the merits
     and risks of an investment in the SOCO Shares. The undersigned has
     evaluated the risks of acquiring the SOCO Shares, which are substantial,
     and has determined that the SOCO Shares are a suitable investment for the
     undersigned.

     (b) No governmental or other regulatory agency has made any finding or
     determination as to the fairness for public investment, nor any
     recommendation or endorsement, of the SOCO Shares.

     (c) The undersigned has adequate means of providing for its current needs
     and possible contingencies, and it has no need now and anticipates no need
     in the foreseeable future, to sell or otherwise liquidate the SOCO Shares.
     The undersigned is able to bear the economic risks of this investment, and
     consequently, without limiting the generality of the foregoing, it is able
     to hold the SOCO Shares for an indefinite period of time and the
     undersigned has sufficient net worth to sustain a loss of its entire
     investment in the SOCO Shares.

     (d) The undersigned has had sufficient opportunity to ask questions of and
     receive answers from the Company or its representatives and to obtain any
     additional information that the undersigned might request concerning the
     Company or the SOCO Shares.  Any information so requested has been made
     available to the full and complete satisfaction of the undersigned.   No
     representations or warranties have been made to the undersigned by the
     Company or any officer, director, employee, or agent of the Company, other
     than the representations of the Company as set forth in the Offering
     Materials.

     (e) The undersigned understands that the SOCO Shares or any part thereof
     neither have been nor will they be registered under the Securities Act of
     1933 (the "Act") in reliance upon exemptions from registration nor have the
     SOCO Shares or any part thereof been registered under any other securities
     laws.  Neither the SOCO Shares nor any part thereof can be sold,
     transferred or assigned without compliance with the provisions of the Act,
     applicable other securities laws and the further terms hereof.  The
     undersigned is the sole party in interest under this Agreement.  The
     undersigned is acquiring the SOCO Shares solely for investment for the
     account of the undersigned and has no present agreement, understanding or
     arrangement to subdivide, sell, assign, transfer or otherwise dispose of
     all or any part of the SOCO Shares to any other person.

     (f) The information set forth herein regarding the undersigned is complete
     and accurate in all respects.

     (g) No broker or finder has acted on behalf of the undersigned with respect
     to this matter.
 
     (h) If applicable and if so advised by Territorial, the undersigned
     shall report the exchange of the Territorial Shares for the SOCO Shares
     pursuant to the Merger (the "Exchange") for U.S. federal income tax
     purposes as a tax-free reorganization meeting the requirements of 

                                       2
<PAGE>
 
     Section 368(a) of the U.S. Internal Revenue Code of 1986, as amended (the
     "Code") and a transaction for which a "toll charge" is not due under
     Section 367(a) of the Code. The undersigned understands that if, as a
     result of the Merger and the 36,000:1 reverse stock split (the "Reverse
     Stock Split") preceding the Merger, the holders of more than 20% of the
     shares of Territorial stock that are outstanding on the date hereof receive
     cash rather than SOCO Shares in exchange for their shares of Territorial
     stock (giving effect to the Reverse Stock Split), then the Exchange will be
     reportable as a taxable transaction under U.S. tax laws. In such event, the
     undersigned further understands that the undersigned may be obligated to
     pay U.S. income taxes on any gain resulting from such exchange. Last, the
     undersigned acknowledges that, except as noted above, neither Territorial
     nor SOCO is responsible for advising the undersigned concerning tax matters
     resulting from the Merger or the Reverse Stock Split, and the undersigned
     shall look to its own personal tax advisors for tax advice concerning such
     transactions.

     The foregoing representations, warranties, and agreements shall survive the
     issuance of the SOCO Shares and such warranties and representations are
     true, correct and complete. The undersigned agrees to notify the Company of
     any adverse changes in the foregoing information which may hereafter occur.

     (i)  Since 1 January 1998, the undersigned has not directly or indirectly
     traded shares of Company or Territorial equity securities, any derivatives
     thereof or any options to buy or sell such equity securities or
     derivatives.

3.   Transfer of Securities.

     (a) Restriction on Transfer.  The Restricted Securities (as hereinafter
     defined), and any shares of capital stock received in respect thereof,
     whether by reason of a stock split or share reclassification thereof, a
     stock dividend thereon or otherwise, shall not be transferable except upon
     the conditions specified in this Section 3, which conditions are intended
     to insure compliance with the provisions of the Act in respect of the
     Transfer (as hereinafter defined) thereof.

     (b) Definitions.  As used in this Section 3, the following terms shall have
     the following respective meanings:

          "Restricted Securities" shall mean the SOCO Shares and any shares of
          capital stock of the Company received in respect of any thereof, in
          each case which have not been sold to the public pursuant to (a)
          registration under the Act or (b) Rule 144 (or similar or successor
          rule) promulgated under the Act.

          "Transfer" shall include any disposition of any Restricted Securities
          or of any interest therein which would constitute a sale thereof
          within the United States within the meaning of Regulation S under the
          Act.

                                       3
<PAGE>
 
     (c) Restrictive Legends.  Each certificate for the Restricted Securities
     and any shares of stock of SOCO received in respect thereof, whether by
     reason of a stock split or share reclassification thereof, a stock dividend
     thereon or otherwise and each certificate for any such securities issued to
     subsequent transferees of any such certificate shall (unless otherwise
     permitted by the provisions of Section 4 hereof) be stamped or otherwise
     imprinted with a legend in substantially the following form:

          "THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR
          INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
          1933, AS AMENDED.  THESE SECURITIES MAY NOT BE SOLD OR TRANSFERRED IN
          THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER SAID
          ACT.  ADDITIONALLY, THE TRANSFER OF THESE SECURITIES IS SUBJECT TO THE
          CONDITIONS SPECIFIED IN SECTIONS 3, 4 AND 5 OF THE AGREEMENT AND
          PURCHASER QUESTIONNAIRE BETWEEN SOCO INTERNATIONAL PLC AND
          ________________________ DATED_________, 1998, AND NO TRANSFER OF
          THESE SECURITIES SHALL BE VALID OR EFFECTIVE UNTIL SUCH CONDITIONS
          HAVE BEEN FULFILLED.  UPON THE FULFILLMENT OF CERTAIN OF SUCH
          CONDITIONS, SOCO INTERNATIONAL PLC  HAS AGREED TO DELIVER TO THE
          HOLDER HEREOF A NEW CERTIFICATE, NOT BEARING THIS LEGEND, FOR THE
          SECURITIES REPRESENTED HEREBY REGISTERED IN THE NAME OF THE HOLDER
          HEREOF.  COPIES OF SUCH AGREEMENT MAY BE OBTAINED AT NO COST BY
          WRITTEN REQUEST MADE BY THE HOLDER OF RECORD OF THIS CERTIFICATE TO
          THE SECRETARY OF SOCO INTERNATIONAL PLC."

          Additionally, such certificates shall contain any other legends
     required by law.

4.   Notice of Transfer.  The undersigned agrees, prior to any Transfer of any
     Restricted Securities, to give written notice to SOCO of the undersigned's
     intention to effect such Transfer and to comply in all other respects with
     the provisions of this Section 4.  Each such notice shall describe the
     manner and circumstances of the proposed Transfer and shall be accompanied
     by the written opinion, addressed to the Company, of counsel for the holder
     of Restricted Securities (which opinion and counsel shall be reasonably
     satisfactory to the Company) to the effect that such proposed Transfer does
     not involve a transaction requiring registration of such Restricted
     Securities under the Act; provided, however, that no such opinion shall be
     required in connection with a Transfer pursuant to Rule 144 promulgated
     under the Act provided, that the Company be provided with customary written
     representations relating to such transaction.  If in the opinion of such
     counsel (if such opinion is required hereunder) the proposed Transfer of
     Restricted Securities may be effected without registration under the Act,
     the holder of Restricted Securities shall thereupon be entitled to transfer
     Restricted Securities in accordance with the terms of the notice delivered
     by it to the Company.  Each certificate or other instrument evidencing the
     securities issued upon the Transfer of any Restricted Securities (and each
     certificate or other instrument evidencing any 

                                       4
<PAGE>
 
     untransferred balance of such securities) shall bear the legends set forth
     in Section 3 hereof unless (a) in the opinion of such counsel registration
     of future Transfers is not required by the applicable provisions of the
     Act, (b) the Company shall have waived the requirement of such legends or
     (c) there shall be an effective registration statement relating to such
     Restricted Securities; provided, however, that such legend shall not be
     required on (x) any certificate or other instrument evidencing the
     securities issued upon such Transfer in the event such Transfer shall be
     made in compliance with the requirements of Rule 144 (as amended from time
     to time) promulgated under the Act (or successor rule thereto) or (y) on
     any certificate or other instrument which is immediately resalable (whether
     or not such resale is proposed) under Rule 144(k) or successor rule
     thereto. The holder of Restricted Securities shall not transfer such
     Restricted Securities until such opinion of counsel has been given (unless
     waived by the Company or unless such opinion is not required in accordance
     with the provisions of this Section 4) or until registration of the
     Restricted Securities (to the extent such securities are Restricted
     Securities) involved in the above-mentioned request has become effective
     under the Act.

5.   Lock-Up. In addition to the restrictions on transfers expressed elsewhere
     in this Agreement, the undersigned agrees and undertakes that, prior to the
     date falling six months after the closing of the Merger ("Closing"), the
     undersigned shall not authorize the sale of, or otherwise transfer its
     legal or beneficial interest in, or sell or publicly announce any intention
     to sell, any SOCO Shares or any securities which are substantially similar
     to or which are convertible into or exchangeable for or carry any rights to
     acquire any shares in SOCO or any securities which are substantially
     similar to such shares, or any option to acquire such securities, without
     the prior written consent of SOCO, which consent may be withheld for any
     reason or no reason at the sole discretion of SOCO, PROVIDED THAT no
     consent shall be required for a transfer of a number of SOCO Shares which,
     when aggregated with the number of SOCO Shares previously transferred by
     the undersigned during the period of time beginning on the date hereof and
     ending on the date falling six months after the Closing, does not exceed
     10% of the SOCO Shares originally received by the undersigned pursuant to
     the Merger, and PROVIDED FURTHER THAT undersigned notifies in writing the
     Company or a party to whom the Company has delegated its authority under
     this Section 5 so that such notice is received at least 10 days in advance
     of any transfer.

6.   Restriction on Trading.  In addition to the restrictions set forth in other
     Sections of this Agreement and not in substitution thereof, the undersigned
     mutually agrees with the Company that the undersigned shall refrain from
     trading any Company or Territorial equity securities, any derivative
     thereof or any option to buy or sell any such equity security or derivative
     from the date hereof through the Merger Effective Date.

7.   Nature of Agreement.  This Agreement shall not be binding on the Company
     until it shall be accepted by the Company, such acceptance to be indicated
     by the execution of this Agreement by or on behalf of the Company at the
     place provided.  The undersigned may not cancel, terminate or revoke this
     agreement.

                                       5
<PAGE>
 
8.   Indemnity.  The undersigned hereby agrees to indemnify and hold harmless
     the Company, and its officers, directors, employees, and agents, of and
     from any and all loss, liability, claim, damage, and expense (including,
     without limitation, attorney's fees and disbursements) incurred as a result
     of any misrepresentation or breach of an agreement or warranty made by the
     undersigned herein or in any other document furnished by the undersigned to
     any of such persons in connection with this transaction.

9.   Miscellaneous.  This Agreement shall be governed by, and construed in
     accordance with, the laws of the State of Texas.  Capitalized terms not
     otherwise defined herein shall have the meanings ascribed to them in the
     Merger Agreement.  All captions of sections are for convenience only.  This
     agreement is not transferable or assignable by the undersigned.  If the
     undersigned is more than one person, the obligations of the undersigned
     shall be joint and several and the agreements, representations and
     warranties herein contained shall be deemed to be made by and be binding
     upon each such person and his heirs, executors, administrators and
     successors.  Any communication required hereunder may be sent by regular
     mails or delivered personally to the undersigned at undersigned's address
     listed below or to the Company at Swan House, 32/33 Old Bond Street, London
     W1X 3AD, United Kingdom, as the case may be.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                       6
<PAGE>
 
10.  Offeree Information.  PLEASE PRINT ALL INFORMATION.  ANSWER ALL QUESTIONS.
     Attach separate sheets if necessary.

                           TYPE EXCEPT FOR SIGNATURE
                     [Attach additional sheets if required]

1.   Name of Undersigned: _____________________

     Telephone : _________________________  Street: ________________________

     City: ________________  State or Province (if applicable):_______________

     Country: ___________________ Zip or other postal code:___________________

     Business: _______________________________________________________________

2.   The undersigned qualifies as an "accredited investor" within the meaning of
     Regulation D promulgated under the Securities Act of 1933, as such
     qualifications are more specifically described on Schedule 1 attached
     hereto.

3.   Type of Entity (if undersigned is not an individual):__________________

          Date of Formation: _______________________________________________

          State (or Country) laws under which organized: ________

          Principal place of business:______________________________________

          Address(es) of all entity office(s):______________________________
 
          __________________________________________________________________

          Number of beneficial owners of entity:____________________________

4.   Taxpayer Identification Number (if any): ______________________________

                              Signature:_____________________

                              Name:__________________________
Accepted:
SOCO International plc


By:
   ----------------------------

   ----------------------------  
   Chief [Executive] Officer



                                       7
<PAGE>
 
                                   SCHEDULE 1
                          Accredited Investor Standard

     Regulation D, Rules 501-508, promulgated under the Securities Act of 1933,
as amended (the "Act") defines "accredited investor" as follows:

     1.   Any bank as defined in section 3(a)(2) of the Act, or any savings and
loan association or other institution as defined in section 3(a)(5)(A) of the
Act whether acting in its individual or fiduciary capacity; any broker or dealer
registered pursuant to section 15 of the Securities Exchange Act of 1934; any
insurance company as defined in section 2(13) of the Act; any investment company
registered under the Investment Company Act of 1940 or a business development
company as defined in section 2(a)(48) of the Act; Small Business Investment
Company licensed by the U.S. Small Business Administration under section 301(c)
or (d) of the Small Business Investment Act of 1958; any plan established and
maintained by a state, its political subdivisions, or any agency or
instrumentality of a state or its political subdivisions for the benefit of its
employees, if such plan has total assets in excess of $5,000,000; employee
benefit plan within the meaning of the Employee Retirement Income Security Act
of 1974 if the investment decision is made by plan fiduciary, as defined in
section 3(21) of such Act, which is either a bank, savings and loan association,
insurance company, or registered investment adviser, or if the employee benefit
plan has total assets in excess of $5,000,000 or, if a self-directed plan, with
investment decisions made solely by persons that are accredited investors;

     2.   Any private business development company as defined in section
202(a)(22) of the Investment Advisers Act of 1940;

     3.   Any organization described in Section 501(c)(3) of the Internal
Revenue Code, corporation, Massachusetts or similar business trust, or
partnership, not formed for the specific purpose of acquiring the securities
offered, with total assets in excess of $5,000,000;

     4.   Any director, executive officer, or general partner of the issuer of
the securities being offered or sold, or any director, executive officer, or
general partner of a general partner of that issuer;

     5.   Any natural person whose individual net worth, or joint net worth with
that person's spouse, at the time of his purchase exceeds $1,000,000;

     6.   Any natural person who had an individual income in excess of $200,000
in each of the two most recent years or joint income with that person's spouse
in excess of $300,000 in each of those years and has a reasonable expectation of
reaching the same income level in the current year;

     7.   Any trust, with total assets in excess of $5,000,000, not formed for
the specific purpose of acquiring the securities offered, whose purchase is
directed by a sophisticated person as described in Securities Exchange
Commission Rule 506(b)((2)(ii); and

     8.   Any entity in which all of the equity owners are accredited investors.
<PAGE>
 
                                   EXHIBIT C

                             SOCO INTERNATIONAL PLC

                    AGREEMENT AND PURCHASER QUESTIONNAIRE OF

                               ______[Name]______

          _____[Name]_____, a_[Entity][Individual]__(the "undersigned"),
understands that:

A.   The undersigned currently owns _______ shares (the "Territorial Shares") of
     the Common Capital Stock of TERRITORIAL RESOURCES, INC., corporation formed
     under the laws of the State of Colorado ("Territorial").

B.   SOCO INTERNATIONAL PLC, a public limited company formed under the laws of
     England and Wales ("SOCO"), wishes to acquire Territorial by a merger (the
     "Merger") to be effected in accordance with the terms of that certain
     Reorganization Agreement and Plan of Merger dated January __, 1998 by and
     among SOCO, Territorial, the undersigned and certain other Territorial
     shareholders (the "Merger Agreement").

C.   Pursuant to the Merger Agreement, the undersigned would receive shares of
     the Common Stock (the "SOCO Shares") of SOCO that have an aggregate agreed
     value at the time of the Merger (determined pursuant to the Merger
     Agreement) equal to the product of (i) $1.45 multiplied by (ii) the number
     of Territorial Shares indicated in Paragraph A above.

1.   Acceptance.  Subject to the terms and conditions hereof ("this Agreement"),
     the undersigned hereby irrevocably agrees to accept the SOCO Shares
     pursuant to the terms and conditions of the Merger Agreement.

2.   Representations and Warranties of the Subscriber.  The undersigned hereby
     represents and warrants to and agrees with SOCO as follows:

     (a) The undersigned has been furnished with a copy of the Merger Agreement,
     Territorial's Annual Report on Form 10-KSB for the fiscal year ended March
     31, 1997, Territorial's Quarterly Reports on Form 10-QSB for the quarterly
     periods ended June 30, 1997 and September 30, 1997, SOCO's Listing
     Particulars dated 14 May 1997 and SOCO's Interim Report dated 30 June 1997
     (collectively, the "Offering Materials"). The undersigned has received and
     read the Offering Materials and is familiar with the terms and provisions
     thereof. The undersigned is a knowledgeable and sophisticated investor,
     capable of evaluating the merits and risks of an investment in the SOCO
     Shares. The undersigned has evaluated the risks of acquiring the SOCO
     Shares, which are substantial, and has determined that the SOCO Shares are
     a suitable investment for the undersigned.

                                       1
<PAGE>
 
     (b) No governmental or other regulatory agency has made any finding or
     determination as to the fairness for public investment, nor any
     recommendation or endorsement, of the SOCO Shares.

     (c) The undersigned has adequate means of providing for its current needs
     and possible contingencies, and it has no need now and anticipates no need
     in the foreseeable future, to sell or otherwise liquidate the SOCO Shares.
     The undersigned is able to bear the economic risks of this investment, and
     consequently, without limiting the generality of the foregoing, it is able
     to hold the SOCO Shares for an indefinite period of time and the
     undersigned has sufficient net worth to sustain a loss of its entire
     investment in the SOCO Shares.

     (d) The undersigned has had sufficient opportunity to ask questions of and
     receive answers from the Company or its representatives and to obtain any
     additional information that the undersigned might request concerning the
     Company or the SOCO Shares.  Any information so requested has been made
     available to the full and complete satisfaction of the undersigned.   No
     representations or warranties have been made to the undersigned by the
     Company or any officer, director, employee, or agent of the Company, other
     than the representations of the Company as set forth in the Offering
     Materials.

     (e) The undersigned understands that the SOCO Shares or any part thereof
     neither have been nor will they be registered under the Securities Act of
     1933 (the "Act") in reliance upon exemptions from registration nor have the
     SOCO Shares or any part thereof been registered under any other securities
     laws.  Neither the SOCO Shares nor any part thereof can be sold,
     transferred or assigned without compliance with the provisions of the Act,
     applicable other securities laws and the further terms hereof.  The
     undersigned is the sole party in interest under this Agreement.  The
     undersigned is acquiring the SOCO Shares solely for investment for the
     account of the undersigned and has no present agreement, understanding or
     arrangement to subdivide, sell, assign, transfer or otherwise dispose of
     all or any part of the SOCO Shares to any other person.

     (f) The information set forth herein regarding the undersigned is complete
     and accurate in all respects.

     (g) No broker or finder has acted on behalf of the undersigned with respect
     to this matter.

     The foregoing representations, warranties, and agreements shall survive the
     issuance of the SOCO Shares and such warranties and representations are
     true, correct and complete. The undersigned agrees to notify the Company of
     any adverse changes in the foregoing information which may hereafter occur.

3.   Transfer of Securities.

     (a) Restriction on Transfer.  The Restricted Securities (as hereinafter
     defined), and any shares of capital stock received in respect thereof,
     whether by reason of a stock split or share reclassification thereof, a
     stock dividend thereon or otherwise, shall not be transferable 

                                       2
<PAGE>
 
     except upon the conditions specified in this Section 3, which conditions
     are intended to insure compliance with the provisions of the Act in respect
     of the Transfer (as hereinafter defined) thereof.

     (b) Definitions.  As used in this Section 3, the following terms shall have
     the following respective meanings:

          "Restricted Securities" shall mean the SOCO Shares and any shares of
          capital stock of the Company received in respect of any thereof, in
          each case which have not been sold to the public pursuant to (a)
          registration under the Act or (b) Rule 144 (or similar or successor
          rule) promulgated under the Act.

          "Transfer" shall include any disposition of any Restricted Securities
          or of any interest therein which would constitute a sale thereof
          within the meaning of the Act.

     (c) Restrictive Legends.  Each certificate for the Restricted Securities
     and any shares of stock of SOCO received in respect thereof, whether by
     reason of a stock split or share reclassification thereof, a stock dividend
     thereon or otherwise and each certificate for any such securities issued to
     subsequent transferees of any such certificate shall (unless otherwise
     permitted by the provisions of Section 4 hereof) be stamped or otherwise
     imprinted with a legend in substantially the following form:

          "THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR
          INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
          1933, AS AMENDED.  THESE SECURITIES MAY NOT BE SOLD OR TRANSFERRED IN
          THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER SAID
          ACT.  ADDITIONALLY, THE TRANSFER OF THESE SECURITIES IS SUBJECT TO THE
          CONDITIONS SPECIFIED IN SECTIONS 3, 4 AND 5 OF THE AGREEMENT AND
          PURCHASER QUESTIONNAIRE BETWEEN SOCO INTERNATIONAL PLC AND
          ________________________ DATED_________, 1998, AND NO TRANSFER OF
          THESE SECURITIES SHALL BE VALID OR EFFECTIVE UNTIL SUCH CONDITIONS
          HAVE BEEN FULFILLED.  UPON THE FULFILLMENT OF CERTAIN OF SUCH
          CONDITIONS, SOCO INTERNATIONAL PLC  HAS AGREED TO DELIVER TO THE
          HOLDER HEREOF A NEW CERTIFICATE, NOT BEARING THIS LEGEND, FOR THE
          SECURITIES REPRESENTED HEREBY REGISTERED IN THE NAME OF THE HOLDER
          HEREOF.  COPIES OF SUCH AGREEMENT MAY BE OBTAINED AT NO COST BY
          WRITTEN REQUEST MADE BY THE HOLDER OF RECORD OF THIS CERTIFICATE TO
          THE SECRETARY OF SOCO INTERNATIONAL PLC."

          Additionally, such certificates shall contain any other legends
     required by law.

                                       3
<PAGE>
 
4.   Notice of Transfer.  The undersigned agrees, prior to any Transfer of any
     Restricted Securities, to give written notice to SOCO of the undersigned's
     intention to effect such Transfer and to comply in all other respects with
     the provisions of this Section 4.  Each such notice shall describe the
     manner and circumstances of the proposed Transfer and shall be accompanied
     by the written opinion, addressed to the Company, of counsel for the holder
     of Restricted Securities (which opinion and counsel shall be reasonably
     satisfactory to the Company) to the effect that such proposed Transfer does
     not involve a transaction requiring registration of such Restricted
     Securities under the Act; provided, however, that no such opinion shall be
     required in connection with a Transfer pursuant to Rule 144 promulgated
     under the Act provided, that the Company be provided with customary written
     representations relating to such transaction.  If in the opinion of such
     counsel (if such opinion is required hereunder) the proposed Transfer of
     Restricted Securities may be effected without registration under the Act,
     the holder of Restricted Securities shall thereupon be entitled to transfer
     Restricted Securities in accordance with the terms of the notice delivered
     by it to the Company.  Each certificate or other instrument evidencing the
     securities issued upon the Transfer of any Restricted Securities (and each
     certificate or other instrument evidencing any untransferred balance of
     such securities) shall bear the legends set forth in Section 3 hereof
     unless (a) in the opinion of such counsel registration of future Transfers
     is not required by the applicable provisions of the Act, (b) the Company
     shall have waived the requirement of such legends or (c) there shall be an
     effective registration statement relating to such Restricted Securities;
     provided, however, that such legend shall not be required on (x) any
     certificate or other instrument evidencing the securities issued upon such
     Transfer in the event such Transfer shall be made in compliance with the
     requirements of Rule 144 (as amended from time to time) promulgated under
     the Act (or successor rule thereto) or (y) on any certificate or other
     instrument which is immediately resalable (whether or not such resale is
     proposed) under Rule 144(k) or successor rule thereto.  The holder of
     Restricted Securities shall not transfer such Restricted Securities until
     such opinion of counsel has been given (unless waived by the Company or
     unless such opinion is not required in accordance with the provisions of
     this Section 4) or until registration of the Restricted Securities (to the
     extent such securities are Restricted Securities) involved in the above-
     mentioned request has become effective under the Act.

5.   Lock-Up. In addition to the restrictions on transfers expressed elsewhere
     in this Agreement, the undersigned agrees and undertakes that, prior to the
     date falling six months after the closing of the Merger ("Closing"), the
     undersigned shall not authorize the sale of, or otherwise transfer its
     legal or beneficial interest in, or sell or publicly announce any intention
     to sell, any SOCO Shares or any securities which are substantially similar
     to or which are convertible into or exchangeable for or carry any rights to
     acquire any shares in SOCO or any securities which are substantially
     similar to such shares, or any option to acquire such securities, without
     the prior written consent of SOCO, which consent may be withheld for any
     reason or no reason at the sole discretion of SOCO, PROVIDED THAT no
     consent shall be required for a transfer of a number of SOCO Shares which,
     when aggregated with the number of SOCO Shares previously transferred
     during the period of time beginning on the date hereof and ending on the
     date falling six months after the Closing, does not exceed 10% of the SOCO
     Shares originally received by the undersigned pursuant to the Merger, and

                                       4
<PAGE>
 
     PROVIDED FURTHER THAT undersigned notifies in writing the Company or a
     party to whom the Company has delegated its authority under this Section 5
     so that such notice is received at least 10 days in advance of any
     transfer.

6.   Nature of Agreement.  This Agreement shall not be binding on the Company
     until it shall be accepted by the Company, such acceptance to be indicated
     by the execution of this Agreement by or on behalf of the Company at the
     place provided.  The undersigned may not cancel, terminate or revoke this
     agreement.

7.   Indemnity.  The undersigned hereby agrees to indemnify and hold harmless
     the Company, and its officers, directors, employees, and agents, of and
     from any and all loss, liability, claim, damage, and expense (including,
     without limitation, attorney's fees and disbursements) incurred as a result
     of any misrepresentation or breach of an agreement or warranty made by the
     undersigned herein or in any other document furnished by the undersigned to
     any of such persons in connection with this transaction.

8.   Miscellaneous.  This Agreement shall be governed by, and construed in
     accordance with, the laws of the State of Texas.  All captions of sections
     are for convenience only.  This agreement is not transferable or assignable
     by the undersigned.  If the undersigned is more than one person, the
     obligations of the undersigned shall be joint and several and the
     agreements, representations and warranties herein contained shall be deemed
     to be made by and be binding upon each such person and his heirs,
     executors, administrators and successors.  Any communication required
     hereunder may be sent by regular mails or delivered personally to the
     undersigned at undersigned's address listed below or to the Company at Swan
     House, 32/33 Old Bond Street, London W1X 3AD, United Kingdom, as the case
     may be.

9.   Offeree Information.  PLEASE PRINT ALL INFORMATION.  ANSWER ALL QUESTIONS.
     Attach separate sheets if necessary.

                           TYPE EXCEPT FOR SIGNATURE
                     [Attach additional sheets if required]

1.   Name of Undersigned: _____________________

     Telephone : _____________________________ Street: _______________________

     City: ____________________ State:_____________Zip: ______________________

     Business:________________________________________________________________

2.   The undersigned qualifies as an "accredited investor" within the meaning of
     Regulation D promulgated under the Securities Act of 1933.

                                       5
<PAGE>
 
3.   Type of Entity (if undersigned is not an individual):____________________

          Date of Formation:__________________________________________________

          State (or Country) laws under which organized: ________

          Principal place of business:________________________________________

          Address(es) of all entity office(s):________________________________
          ____________________________________________________________________
 
          Number of beneficial owners of entity:_____________________________

4.   Taxpayer Identification Number (if any):________________________________


                                                Signature

                                                ____________

                                                By:
 


Accepted:

SOCO International plc


By:
   --------------------------------     
   
   ------------------------ 
   Chief [Executive] Officer

                                       6
<PAGE>
 
                                   SCHEDULE 1
                          Accredited Investor Standard

     Regulation D, Rules 501-508, promulgated under the Securities Act of 1933,
as amended (the "Act") defines "accredited investor" as follows:

     1.   Any bank as defined in section 3(a)(2) of the Act, or any savings and
loan association or other institution as defined in section 3(a)(5)(A) of the
Act whether acting in its individual or fiduciary capacity; any broker or dealer
registered pursuant to section 15 of the Securities Exchange Act of 1934; any
insurance company as defined in section 2(13) of the Act; any investment company
registered under the Investment Company Act of 1940 or a business development
company as defined in section 2(a)(48) of the Act; Small Business Investment
Company licensed by the U.S. Small Business Administration under section 301(c)
or (d) of the Small Business Investment Act of 1958; any plan established and
maintained by a state, its political subdivisions, or any agency or
instrumentality of a state or its political subdivisions for the benefit of its
employees, if such plan has total assets in excess of $5,000,000; employee
benefit plan within the meaning of the Employee Retirement Income Security Act
of 1974 if the investment decision is made by plan fiduciary, as defined in
section 3(21) of such Act, which is either a bank, savings and loan association,
insurance company, or registered investment adviser, or if the employee benefit
plan has total assets in excess of $5,000,000 or, if a self-directed plan, with
investment decisions made solely by persons that are accredited investors;

     2.   Any private business development company as defined in section
202(a)(22) of the Investment Advisers Act of 1940;

     3.   Any organization described in Section 501(c)(3) of the Internal
Revenue Code, corporation, Massachusetts or similar business trust, or
partnership, not formed for the specific purpose of acquiring the securities
offered, with total assets in excess of $5,000,000;

     4.   Any director, executive officer, or general partner of the issuer of
the securities being offered or sold, or any director, executive officer, or
general partner of a general partner of that issuer;

     5.   Any natural person whose individual net worth, or joint net worth with
that person's spouse, at the time of his purchase exceeds $1,000,000;

     6.   Any natural person who had an individual income in excess of $200,000
in each of the two most recent years or joint income with that person's spouse
in excess of $300,000 in each of those years and has a reasonable expectation of
reaching the same income level in the current year;

     7.   Any trust, with total assets in excess of $5,000,000, not formed for
the specific purpose of acquiring the securities offered, whose purchase is
directed by a sophisticated person as described in Securities Exchange
Commission Rule 506(b)((2)(ii); and

     8.   Any entity in which all of the equity owners are accredited investors.


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