Document:

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                                                                    EXHIBIT 10.1

                            STOCK PURCHASE AGREEMENT

         THIS AGREEMENT is executed this 26th day of August, 2000, by LARRY G.
JORDAN of Eufaula, Oklahoma, JIM and BILLIE BAKER of Oklahoma City, Oklahoma,
KEITH D. MENEES of Oklahoma City, Oklahoma, WILLARD L. and JEANNE O'DANIEL of
McAlester, Oklahoma, JAMES W. and LAVADA GREER LIVING TRUST of Eufaula,
Oklahoma, JACK and MARIE SELLERS of Eufaula, Oklahoma, and MARK R. HOY of
Dallas, Texas, herein referred to, individually, as "Seller" and, collectively,
as "Sellers", and ENERGAS RESOURCES INC., a British Columbia, Canada corporation
("Energas"), with Energas maintaining offices in Oklahoma City, Oklahoma.

                                    RECITALS

         (a) Sellers represent that they own 100% of the outstanding and issued
capital stock of FIRST NATURAL GAS, INC., an Oklahoma corporation ("the
Company"), said outstanding and issued shares being 1,660 shares ("Sellers'
Stock"). Each Seller represents that his share of Sellers' Stock is as follows:

<Table>
<Caption>
                           Seller                                  No. of Shares
                           ------                                  -------------
<S>                                                                <C>
                  Larry G. Jordan                                      1,075
                  Jim and Billie Baker                                   105
                  Keith D. Menees                                         70
                  Willard L. and Jeanne O'Daniel                         140
                  James W. and LaVada Greer Living Trust                 225
                  Jack and Marie Sellers                                  35
                  Mark R. Hoy                                             10
</Table>

         (b) By this Agreement, Seller is selling to Energas and Energas is
buying from Seller all of Seller's Stock.

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         (c) Sellers represent that, at closing, the only assets of the
Company will consist of the real and personal property described in the
schedule which is attached hereto and made a part hereof as Exhibit A, said
property described in Exhibit A being referred to herein as "the Assets".

         (d) The sale and purchase of Seller's Stock will be consummated
pursuant to the following terms and conditions:

                                   AGREEMENT

         1. COMMITMENT TO SELL AND PURCHASE. Seller agrees to sell to Energas
and Energas agrees to buy from Seller all of Seller's Stock, subject to the
terms and conditions contained in the balance of this Agreement.

         2. CONSIDERATION. The total consideration for the sale by Seller to
Energas of Seller's Stock is the following:

            (a) Six hundred thousand dollars (U.S.) ($600,000 U.S.) to be
paid by Energas to Sellers pursuant to individual convertible promissory
notes to be signed by Energas in favor of each Seller ("the Convertible
Note"). The Convertible Note shall be in the principal amount in favor of
each Seller as follows:

<Table>
<Caption>
                           SELLER                                     AMOUNT OF NOTE
                           ------                                     --------------
<S>                                                                   <C>
                  Larry G. Jordan                                        $388,554
                  Jim and Billie Baker                                     37,950
                  Keith D. Menees                                          25,302
                  Willard L. and Jeanne O'Daniel                           50,604
                  James W. and LaVada Greer Living Trust                   81,324
                  Jack and Marie Sellers                                   12,648
                  Mark R. Hoy                                               3,618
</Table>

Each note shall be payable twelve months from the date it is delivered to Seller
and it shall provide for interest on the principal amount of 10% per annum. The
promissory note shall also provide that

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the net income of the Company, calculated at the end of each calendar month,
shall be applied on the then interest due on the note with the balance of
said monthly net income to be deposited in a special bank account to be
opened with the escrow bank. The net income, after deducting the interest
payments, shall be held by the escrow bank and paid over either to Energas
with Seller's Stock pursuant to Paragraph 9(a) or to Seller pursuant to
Paragraph 9(b). The monthly interest payment out of net income shall be
applied to each Seller's note in the following proportions:

<Table>
<Caption>
                           Seller                                 Share of Net Income
                           ------                                 -------------------
<S>                                                               <C>
                  Larry G. Jordan                                       64.759%
                  Jim and Billie Baker                                   6.325%
                  Keith D. Menees                                        4.217%
                  Willard L. and Jeanne O'Daniel                         8.434%
                  James W. and LaVada Greer Living Trust                13.554%
                  Jack and Marie Sellers                                 2.108%
                  Mark R. Hoy                                            0.603%
</Table>

The net income shall be calculated according to reasonable and ordinary
accounting principles as applied by corporations in the same business. Seller
shall be responsible for furnishing Energas a written accounting each month
showing the manner in which the month's net income was calculated and the
manner in which said net income was applied to the interest due on the note.
The Convertible Note also shall provide that at any time after the expiration
of 90 days from the issuance of the note up to its due date, Seller shall
have the option to convert the note and all principal and interest then due
by Energas to Seller under said note into shares of Energas at an agreed
value of U.S. $2.00 per share. That is, in lieu of Seller's right to be paid
the then principal and interest owed to him, he shall receive a number of
shares of stock in Energas equal to the total principal and interest then
owed to him divided by U.S. $2.00. Immediately following either the full
payment of the note or the conversion of the note to stock, as authorized
herein, the then members of the Board

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of Directors of the Company and all officers of the Company shall resign and
the stockholders shall elect a new Board of Directors who shall elect new
officers of the Company.

         3. REGULATORY APPROVAL. It is understood that this Agreement and,
particularly, the issuance of the Convertible Note is subject to obtaining
written approval from the Canadian Venture Exchange (CDNX). The Agreement may
also be subject to approval by the Oklahoma Corporation Commission. If such
approval has not been issued prior to October 1, 2000, this Agreement,
without the written consent of Seller and Energas, shall be void.

         4. REPRESENTATIVES, WARRANTIES AND COVENANTS BY SELLER. Seller
represents and warrants unto, and covenants with, Energas as follows:

            (a)      The Company is a corporation duly organized, validly
                     existing and in good standing under the laws of the
                     State of Oklahoma. The Company has all requisite
                     corporate power and authority to own its properties
                     and to conduct its business as presently being
                     conducted by it. The Company has no subsidiaries. The
                     Company has not qualified to do business as a foreign
                     corporation in any jurisdiction.

            (b)      The authorized capital stock of the Company consists
                     of 2,000 shares of common stock, of which 1,660 shares
                     are issued and outstanding. All of the outstanding
                     shares have been duly authorized, and are validly
                     issued, fully paid and non-assessable. There are no
                     options, warrants, calls, conversion or other rights,
                     or any agreements or commitments of any nature which
                     obligate the Company to issue any additional shares
                     of capital stock or any securities convertible into
                     or exchangeable for any such shares of capital stock
                     and no authorization therefore has been given.

            (c)      True and complete copies of the Articles of
                     Incorporation and all amendments thereto, bylaws
                     (certified by the secretary of the Company), and the
                     minute book and stock record of the Company will be
                     delivered by Seller to Energas on or before August
                     18, 2000, for its review. The minute book of the
                     Company reflects minutes and records maintained by the

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                     Company regarding meetings heretofore held and consents
                     heretofore granted by the directors and shareholders of
                     the Company.

            (d)      All federal, state and local (city, township, county)
                     income, sales, use, franchise, employment, social
                     security and real and personal property tax returns
                     required to be filed by or on behalf of the Company
                     under applicable federal, state or local law have
                     been duly filed; all taxes, assessments and levies
                     required to be paid by the Company in respect to such
                     matters to the extent that such taxes, assessments
                     and levies have become due and payable, have been
                     paid; and adequate provision for the payment of taxes
                     reasonably estimated to become due in respect to such
                     tax matters have been made. Federal income tax
                     returns of the Company have not been examined by the
                     Internal Revenue Service or by the Oklahoma Tax
                     Commission for the fiscal years presently open under
                     applicable statutes of limitations, and no
                     assessments or deficiencies for the past fiscal years
                     of the Company have been made or are now owing. There
                     are in effect no waivers of the applicable statute of
                     limitations for federal or state taxes for any
                     period. On or before September 1, 2000, true and
                     complete copies of all federal and state income tax
                     returns of the Company for the then three past fiscal
                     years will be delivered to Energas. Such returns,
                     which will have been properly and accurately compiled
                     and completed, in accordance with applicable federal
                     and states income tax law, present fairly the
                     information purported to be shown thereby and reflect
                     all the tax liabilities of the Company with respect
                     to the matters reported therein regarding such tax
                     periods. Seller shall be responsible for all taxes,
                     penalties and interest of whatsoever nature which may
                     be payable by the Company for income up to October 2,
                     2000. In this connection, Seller shall file all short
                     period federal and state income tax returns covering
                     the period of time from the closing date of the
                     Company's last fiscal year up to October 2, 2000.

            (e)      The Company has a defensible title to all of the
                     Assets and the Assets are free and clear of all
                     liens, mortgages or other encumbrances created or
                     allowed to be created by the Company.

                                      -5-
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                  (f)      All bank accounts, real estate, automobiles, trucks
                           and other vehicles and all other property presently
                           owned by the Company which are not specifically
                           described in Exhibit A as part of the Assets will be
                           assigned, conveyed and transferred by the Company to
                           Seller or other entities or parties prior to the
                           closing so that none of such property not part of the
                           Assets and none of the obligations relating to such
                           additional property shall be owned by the Company or
                           burden the Company at the time of closing.

                  (g)      Policies of insurance, in accordance with oil and gas
                           industry standards, are currently maintained by the
                           Company with respect to the Assets and all such
                           policies are in full force and effect and will be
                           maintained until closing in accordance with the
                           present expiration date. If any policy expires prior
                           to closing, same shall be renewed for the same amount
                           of coverage and with the same, or an equivalently
                           sound, insurer.

                  (h)      Except for the oil and gas leases, assignments of oil
                           and gas leases, pooling orders, farmout agreements,
                           joint operating agreements, gas sales contracts,
                           rights-of-way agreements, easements and gas gathering
                           contracts which relate to or affect the Assets, there
                           are no other written agreements, commitments,
                           options, employment contracts, consulting contracts,
                           loan agreements, bonuses, incentive compensation,
                           pension and profit sharing plans, employee benefit or
                           stock option plans or arrangements, which would
                           affect the Assets. Further, there is no material
                           default or claim of material default known by Seller
                           to be pending or asserted against the Company by any
                           party to any of the existing contracts or agreements
                           included among the Assets. Provided, however, if
                           there are currently any outstanding retirement,
                           pension or profit sharing plans of the Company in
                           force, prior to the date that the promissory note is
                           converted by Seller to Energas stock or prior to the
                           date that the promissory note has been paid in full,
                           any such plans will be completely removed as an
                           obligation of the Company, all to the satisfaction of
                           Energas and its counsel.

                  (i)      There are no actions, suits, or proceedings pending
                           against the Company, its properties or business.

                                      -6-
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                  (j)      Seller owns Seller's Stock free and clear of all
                           liens, claims, encumbrances and restrictions
                           whatsoever. There are no outstanding options by any
                           third party to purchase Seller's Stock nor is there
                           any obligation by Seller to first offer to sell any
                           of Seller's Stock to the Company or to any third
                           party.

                  (k)      There are no legal proceedings pending or threatened
                           against Seller which, if adversely determined, could,
                           in any respect, prevent or impair the ability of
                           Seller to perform his obligations under this
                           Agreement.

                  (l)      No dividends have been or will be declared by the
                           Company or its Board of Directors which would
                           obligate the Company to pay dividends to Seller or
                           any third party subsequent to closing.

                  (m)      Neither Seller nor the Company has been placed on
                           notice of any claims by the Oklahoma Corporation
                           Commission, the Oklahoma Water Resources Board or any
                           other federal or state agency or any third party for
                           damages or claims for damages to the surface or
                           sub-surface environment of the Assets.

                  (n)      Seller agrees to defend Energas against all claims by
                           third parties which may be made in the future by
                           reason of the sale of Seller's Stock and if any claim
                           results in a final, unappealable judgment against
                           Energas, Seller shall pay said judgment.

                  (o)      All of the foregoing representations, warranties and
                           covenants shall survive closing and shall be binding
                           upon Seller after closing.

         5. COVENANTS OF SELLER PENDING CLOSING. Seller covenants with Energas
that between the date hereof and the closing (except as otherwise provided or
contemplated by this Agreement or as consented to by Energas in advance in
writing) Seller shall:

                  (a)      Cause the Assets to be operated in the usual and
                           ordinary course thereof, as a prudent operator,
                           including producing the wells at rates substantially
                           similar to the average daily rates which they have
                           been produced during the past 12 months,

                                      -7-
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                           and prohibit and prevent the Company from entering
                           into any contract or commitment other than contracts
                           and commitments in the usual and ordinary course of
                           its business.

                  (b)      Cause the Company to maintain its books of account
                           and records in the usual, regular and customary
                           manner, to prepare and file on or prior to the due
                           date thereof all the tax returns required by federal,
                           state and local tax authorities and to pay all taxes
                           (or estimates thereof) due from it to such
                           authorities in respect of its operations prior to the
                           closing.

                  (c)      Prohibit and prevent the Company from amending its
                           Articles of Incorporation or bylaws or from entering
                           into any agreement of merger, consolidation or
                           reorganization, dissolving or entering into any plan
                           of liquidation or dissolution, or committing any of
                           the capital stock, of the Company for sale or
                           assignment to any third parties.

                  (d)      Prohibit and prevent the Company from making any
                           change in the number of issued and outstanding shares
                           of its capital stock or granting any option or making
                           any commitment or agreement relating to its capital
                           stock, or acquiring or creating any subsidiary.

                  (e)      Prohibit and prevent the Company from (i) incurring
                           any indebtedness for money borrowed in addition to
                           the withdrawal of funds as may be necessary in the
                           ordinary and normal course of its business under
                           existing lines of credit, (ii) incurring any
                           indebtedness or liability for money borrowed other
                           than as referenced under (i), contingent or
                           otherwise, except in the ordinary and normal course
                           of its business, (iii) mortgaging, pledging or
                           otherwise subjecting to lien or encumbrance upon any
                           of the Assets, (iv) making any modification or change
                           in any of the existing material contracts or material
                           agreements, except in the ordinary, normal course of
                           its business, (v) making any additions to the assets
                           or purchasing any machinery, equipment or other
                           property relating to the assets or selling or
                           otherwise disposing of any of the assets except in
                           the ordinary and normal course of business.

                  (f)      Cause the Company to afford representatives of
                           Energas access during normal business hours and upon
                           reasonable

                                      -8-
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                           notice to its offices, properties, records, files,
                           contracts, agreements, books of account, tax returns
                           and other documents, and to make and furnish Energas
                           with copies of such items as are reasonably
                           requested by Energas, and to furnish Energas with
                           all information with respect to financial and
                           operating data and all other information concerning
                           its business, operations and properties as Energas
                           may reasonably request. During the period of this
                           Agreement, Energas shall have the right, at its own
                           cost, peril and risk with no liability to be
                           incurred by the Company or Seller, to enter upon the
                           lands comprising the Assets for purposes of
                           inspection and the collection of other data as it
                           deems desirable.

                  (g)      Refrain from and prohibit the Company from soliciting
                           any offer from (or negotiating with) any third party
                           for the direct or indirect acquisition of the
                           Company, or any portion thereof, or any of its stock
                           or any portion of the Assets.

                  (h)      Seller shall maintain the Oklahoma Corporation
                           plugging agreement, with approved security in full
                           force.

         6. CONDITIONS PRECEDENT TO OBLIGATIONS OF ENERGAS. All of the
obligations of Energas under this Agreement are, at its election, subject to the
satisfaction, prior to or at the closing, of the following conditions:

                  (a)      The representations and warranties of Seller
                           contained in this Agreement will have been true and
                           correct in all material respects and Seller will have
                           performed or complied in all material respects with
                           all terms, agreements, and covenants required by this
                           Agreement to be performed by him on or prior to the
                           closing date.

                  (b)      Seller shall have delivered to Energas certificates
                           of good standing issued by the Secretary of State for
                           the State of Oklahoma for the Company dated no
                           earlier than fifteen days prior to the closing date,
                           and reflecting that the Company is in existence and
                           good standing, has filed all required franchise tax
                           returns and has paid all required franchise taxes,
                           and reflecting all instruments filed of record with
                           respect to

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                           the Company through the date of such certificate in
                           the Secretary's office.

                  (c)      No action or proceeding shall be threatened or be
                           pending against Seller or the Company by a third
                           party seeking to restrain or prohibit the performance
                           of, or to obtain damages or other relief in
                           conjunction with this agreement or any of the
                           transactions contemplated hereby.

                  (d)      Since the effective date hereof, no material adverse
                           change shall have occurred in the aggregate with
                           respect to the financial condition or operations of
                           the Company as a whole.

                  (e)      Energas is able to obtain approval from the Canadian
                           Venture Exchange (CDNX) and from the Oklahoma
                           Corporation Commission to this Stock Purchase
                           Agreement.

Prior to closing, Energas may give Seller written notice that Energas is
refusing to consummate the purchase of Seller's Stock because any one or more of
the above conditions have not been met, in which case neither party shall have
any further obligation to the other in connection with this Agreement. If
closing occurs and all or portions of Seller's stock and/or the Assets are
burdened with liens, mortgages or other encumbrances, if any Seller timely
elects to convert his promissory note to Energas stock, prior to issuing said
stock to Seller, Energas shall have the right to sell so much of the Energas
stock to which the Seller is entitled necessary to pay Seller's share, pursuant
to the percentage set out after said Seller's name in Paragraph 2, of the total
amounts secured by all liens, mortgages and other encumbrances and pay the
proceeds of said sale to all lien holders, mortgagees and other encumbrances in
the proportion in which each creditor's debt bears to the total debt secured by
all such liens, mortgages and other encumbrances. As to any Seller who does not
elect to convert his note to Energas stock, prior to paying said note, Energas
shall have the right to withhold from said payment and pay such withheld amount
to all lien holders, mortgagees and

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encumbrances. The amount withheld from the note payment and the amount paid
over to the creditors shall be in the same ratio as set out above in
connection with the sale of Energas stock to which a note is converted and
payment of sales proceeds made to creditors.

         7. CLOSING AND CLOSING DATE. If, prior to the closing date, Energas
fails to give written notice of the rejection of the sale, as provided in
paragraph 6 above, the closing of the sale of Seller's Stock by Seller to
Energas shall occur at a mutually agreeable day and time on or before October
2, 2000 in the offices of Crowe & Dunlevy in Oklahoma City. At closing, the
following shall be accomplished:

            (a)      Seller shall endorse his stock certificates,
                     representing Seller's Stock, over to Energas and
                     entry shall be made in the stock record book of the
                     Company to show Energas as the record holder of
                     Seller's Stock, effective at 7:00 a.m. on the first
                     day of the calendar month when closing occurs.

            (b)      New stock certificates shall be issued in the name of
                     Energas showing it to be the owner of Seller's Stock.

            (c)      Energas, then, shall endorse its stock certificate,
                     representing its ownership of Seller's Stock, in
                     blank, and the endorsed stock certificate shall be
                     delivered to an authorized representative of a state
                     or federal banking institution, satisfactory to both
                     Seller and Energas, said banking institution to act
                     as the escrow agent to hold the endorsed stock
                     certificate in escrow pursuant to the terms of this
                     Agreement.

            (d)      Seller and Energas, along with a representative of
                     the escrow agent, shall execute such escrow agreement
                     as may be required by the escrow agent to protect it
                     and to set forth its obligations under the escrow
                     arrangement.

            (e)      Energas shall deliver to Seller the Convertible Note
                     described in paragraph 2(a) above, as possibly
                     modified pursuant to the final sentence of paragraph
                     6 above.

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            (f)      The original corporate minute books and stock
                     transfer ledgers shall be delivered to the escrow
                     agent to be held in escrow with the stock
                     certificate.

            (g)      Energas, as the owner of Seller's Stock, shall, in
                     writing, confirm that the present Board of Directors
                     of the Company and the present officers of the
                     Company shall continue in their present positions.
                     That is, until the Convertible Note has either been
                     paid in full or converted to Energas stock, as
                     provided for in paragraph 2(a) above, the current
                     management of the Company shall be retained.
                     Provided, however, George G. Shaw, the President of
                     Energas, shall be elected to the current Board of
                     Directors.

         8. RESTRICTIONS ON ENERGAS' OWNERSHIP AND THE COMPANY'S MANAGEMENT.
Until the promissory note has been paid in full or until it has been converted
to Energas stock, the following restrictions shall govern Energas' ownership of
Seller's Stock and the management of the Company:

            (a)      No sale, mortgage, security agreement, lien or
                     encumbrance shall be created, or cause to be created,
                     on any portion of the Assets. The foregoing shall not
                     prohibit a sale or assignment by Energas of a portion
                     of its interest in this agreement.

            (b)      No agreement shall be entered into which would
                     obligate Energas or the Company to sell, assign or
                     otherwise encumber any portion of Seller's shares
                     until the shares are delivered out of escrow to
                     Energas. The foregoing shall not prohibit a sale or
                     assignment by Energas of a portion of its interest in
                     this agreement.

            (c)      The Company shall produce, operate, develop and
                     manage the Assets as a reasonably prudent operator.

            (d)      No gas sales contract shall be executed by the
                     Company which would commit the Company to the sale of
                     natural gas from any of the wells described in
                     Exhibit A for a term longer than 12 months.

            (e)      The covenants of Seller set forth in paragraph 5
                     shall continue to be binding upon Energas, the
                     Company and Seller.

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            Except for the foregoing, Energas shall be considered as the
            owner of Seller's Stock.

         9. BASIC TERMS OF ESCROW; CONSEQUENCES OF DEFAULT. The escrow agent
shall hold Seller's Stock in escrow and shall only deliver said shares out of
escrow under the following circumstances:

            (a)      At such time as either the promissory note has been
                     paid in full, when due, or Seller has elected to
                     convert the promissory note to Energas stock, as
                     provided for above, the escrow agent shall insert
                     Energas' name in the endorsement on the stock
                     certificate and deliver the escrowed stock
                     certificate together with the original corporate
                     minute books and stock transfer ledgers to an
                     authorized representative of Energas.

            (b)      In the event Seller has not timely elected to convert
                     the promissory note to Energas stock and in the event
                     the promissory note is not paid, in full, when due,
                     the escrow agent, upon being satisfied of Energas'
                     default, shall deliver the endorsed stock certificate
                     to Seller at which time Energas shall own no further
                     interest in the Company, Seller shall retain all
                     payments theretofore made on the promissory note and
                     neither Seller, the Company, nor Energas shall have
                     any further obligation to each other, and this
                     Agreement, thereafter, shall be void. The escrow
                     agent, at the same time, shall deliver the original
                     corporate minute books and stock transfer ledgers to
                     Seller.

            The parties acknowledge that neither this Agreement nor the
escrow arrangement creates a lender-borrower or debtor-creditor relationship
between the parties. The escrow arrangement is being utilized for efficient
and expeditious transfer of Seller's Stock to Energas in the event Seller
converts the promissory note to Energas stock or in the event the promissory
note is timely paid in full, or to Seller in the event Energas elects not to
pay the promissory note in full if it has not been converted by Seller to
Energas stock.

                                      -13-
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         10. GOVERNING LAW. This Agreement shall be construed pursuant to the
federal laws of the United States and the laws of the State of Oklahoma.
Provided, however, any laws relating to the approval of this Agreement by the
CDNX shall be governed pursuant to British Columbia and Canadian law.

         11. SUCCESSORS AND ASSIGNS. This Agreement shall be binding upon and
shall inure to the benefit of the respective successors and assigns of Seller
and Energas.

         12. EXECUTION IN COUNTERPART. This Agreement may be executed by the
parties in individual counterpart copies and if each party executes a
counterpart copy, it shall have the same effect as if all parties had
executed the same copy. Provided, however, until all parties have signed a
counterpart copy, there shall be no agreement.

             Dated and executed as of the day, month and year first shown above.

                                           ENERGAS RESOURCES INC.

/s/ Larry G. Jordan                    By:  /s/ George G. Shaw
----------------------------------          ------------------------------------
Larry G. Jordan                             George G. Shaw, President
Rt. 1, Box 53                               The Oil Center
Eufaula, OK 74432                           2601 N.W. Expressway, Suite 1100-W
                                            Oklahoma City, OK 73112

/s/ Jim Baker
----------------------------------
Jim Baker
2812 S.W. 111th Street
Oklahoma City, OK 73170-2448

/s/ Billie Baker
----------------------------------
Billie Baker
2812 S.W. 111th Street
Oklahoma City, OK 73170-2448

/s/ Keith D. Menees
----------------------------------
Keith D. Menees
6013 N. May, No. 161
Oklahoma City, OK 73112

                                      -14-
<Page>

/s/ Willard L. O'Daniel
----------------------------------
Willard L. O'Daniel
208 E. Choctaw
McAlester, OK 74501

/s/ Jeanne O'DANIEL
----------------------------------
Jeanne O'DANIEL
208 E. Choctaw
McAlester, OK 74501

James W. and LaVada Greer Living Trust

By: /s/ James W. Greer
    -------------------------------
       James W. Greer, Trustee
                and

By: /s/ LaVada Greer
    -------------------------------
       LaVada Greer, Trustee
       Rt. 1, Box 708A
       Eufaula, OK 74432

/s/ Jack Sellers
----------------------------------
Jack Sellers
416 Forest
Eufaula, OK 74432

/s/ Marie Sellers
----------------------------------
Marie Sellers
416 Forest
Eufaula, OK 74432

/s/ Mark R. Hoy
----------------------------------
Mark R. Hoy
5858 Waggoner
Dallas, TX 75230

                                      -15-<Page>

EXHIBIT 10.2

                      AMENDMENT TO STOCK PURCHASE AGREEMENT

THIS AMENDMENT is executed this 23RD day of September 2000.

BETWEEN:

             LARRY G. JORDAN, JIM AND BILLIE BAKER, KEITH D. MENEES,
             WILLARD L. AND JEANNE O'DANIEL, JAMES W. AND LAVADA GREER
             LIVING TRUST, JACK AND MARIE SELLERS, AND MARK R. HOY

             (individually referred to as "Seller" and collectively called
             the "Sellers")

AND:

             ENERGAS RESOURCES INC., a British Columbia, Canada corporation

             ("Energas")

WHEREAS:

(A)          Under the date of August 26, 2000, Sellers and Energas executed
a Stock Purchase Agreement (the "Agreement") under the terms of which
Sellers agreed to sell and Energas agreed to buy all of the outstanding and
issued shares ("Seller's Stock") of First Natural Gas, Inc. (the "Company");

(B)          The Agreement, which is incorporated herein and made a part
hereof by reference, is in full force and effect; and

(C)          Subsequent to the execution of the Agreement, Sellers and
Energas have discovered that for regulatory compliance and/or to express the
true intent of the Agreement, the amendments to the Agreement, as set forth
herein are necessary. Accordingly, the Sellers and Energas amend the
Agreement as follows:

AMENDMENT

1. Paragraph 2 ("Consideration") of the Agreement is changed to read as follows:

   "CONSIDERATION. The total consideration for the sale by Seller to Energas
   of Seller's Stock is the following:

                                                                               1

<Page>

(a)          Six hundred thousand dollars (U.S. $600,000) (subject to being
reduced as set forth in paragraph 6) to be paid by Energas to Sellers pursuant
to individual convertible promissory notes to be signed by Energas in favor of
each Seller (the "Convertible Note"). The Convertible Note shall be in the
principal amount (subject to being reduced as set forth in paragraph 6) in
favor of each Seller as follows:

<Table>
<Caption>

                        SELLER                             AMOUNT OF NOTE
<S>                                                        <C>
                                                              $388,554
  Larry G. Jordan

  Jim and Billie Baker                                          37,950

  Keith D. Menees                                               25,302

  Willard L. and Jeanne O'Daniel                                50,604

  James W. and LaVada Greer Living Trust                        81,324

  Jack and Marie Sellers                                        12,648

  Mark R. Hoy                                                    3,618

</Table>

Each note shall be payable twelve months from the date it is delivered to
Seller and it shall provide for interest on the principal amount of 10% per
annum. The promissory note shall also provide that the net income of the
Company, calculated at the end of each calendar month shall be applied on the
then interest due on the note with the balance of said monthly net income to
be deposited in a special bank account to be opened with the escrow bank. The
net income after deducting the interest payments shall be held by the escrow
bank and paid over either to Energas with Seller's Stock pursuant to
Paragraph 9(a) or to Seller pursuant to Paragraph 9(b). The monthly interest
payment out of net income shall be applied to each Seller's note in the
following proportions:

<Table>
<Caption>

                        SELLER                             SHARE OF NET
                                                              INCOME
<S>                                                        <C>

  Larry G. Jordan                                             64.759%

  Jim and Billie Baker                                         6.324%

  Keith D. Menees                                              4.217%

                                                                               2

<Page>

  Willard L. and Jeanne O'Daniel                               8.434%

  James W. and LaVada Greer Living Trust                      13.554%

  Jack and Marie Sellers                                       2.108%

  Mark R. Hoy                                                  0.603%

</Table>

     The net income shall be calculated according to reasonable and ordinary
     accounting principles as applied by corporations in the same business.
     Seller shall be responsible for furnishing Energas a written accounting
     each month showing the manner in which the month's net income was
     calculated and the manner in which said net income was applied to the
     interest due on the note. The Convertible Note also shall provide that
     at any time after the expiration of 45 days from the issuance of the
     note up to its due date. Seller shall have the option to convert the
     note as follows: (a) All principal then due on the note may be converted
     into shares of Energas at an agreed value of U.S. $2.00 per share and
     (b) all interest then due on the note may be converted into shares of
     Energas at the greater of either: $2.00 per share or the then per share
     value of Energas in the open market (calculated in accordance with the
     policies of the CDNX (hereinafter defined)). For example if the unpaid
     principal then due to a Seller on his note is $10,000 and the unpaid
     interest then due to such Seller is $1,000, and the then market value of
     Energas stock is $3.00 per share, that Seller may convert the principal
     to 5,000 shares of Energas stock and may convert the interest to 333
     shares of Energas stock. (All stock conversion shall be to the nearest
     whole number of shares.) The amount of principal and interest then due
     on the note is subject to being reduced pursuant to paragraph 6 below.
     Immediately following either the full payment of the note or the
     conversion of the note to stock, as authorized herein, the then members
     of the Board of Directors of the Company and all officers of the Company
     shall resign and the stockholders shall elect a new Board of Directors
     who shall elect new officers of the Company."

2. Paragraph 3 ("Regulatory Approval") of the Agreement is changed to read as
follows:

"REGULATORY APPROVAL. It is understood that this Agreement and, particularly,
the issuance of the Convertible Note is subject to obtaining written acceptance
from the Canadian Venture Exchange ("CDNX") of the transactions contemplated
herein and an exemption order from the British Columbia Securities Commission
(the "Commission") to permit the distribution of each CONVERTIBLE Note to each
Seller. The Agreement may also be subject to approval by the OKLAHOMA
CORPORATION COMMISSION. If any such acceptance, permission or approval has not
been issued prior to October 29, 2000, this Agreement, without the written
consent of Seller and Energas, shall be void. Seller agrees to use his or her
best efforts to assist Energas to procure all required regulatory acceptance,
permissions or approvals."

3. Paragraph 4 ("Representatives, Warranties and Covenants by Seller"),
sub-paragraph (c) is changed to read as follows:

                                                                               3

<Page>

     "True and complete copies of the Articles of Incorporation and all
     amendments thereto, bylaws (certified by the secretary of the Company),
     and the minute book and stock record of the Company will be delivered by
     Seller to Energas on or before September 25,2000, for its review. The
     minute book of the Company reflects minutes and records maintained by
     the Company regarding meetings heretofore held and consents heretofore
     granted by the directors and shareholders of the Company."

4. Paragraph 4 ("Representatives, Warranties and Covenants by Seller"),
sub-paragraph (0) is deleted and the following is inserted thereto;

     "Seller agrees to cause the Company to maintain payments on all
     liabilities as they become due and to keep the Company in good standing
     with all of this creditors."

5. Paragraph 4, ("Representatives, Warranties and Covenants by Seller") is
amended such that the following is inserted as sub-paragraph (p):

     "After the closing, Seller agrees to cause the Company to enter into an
     employment agreement Mr. Larry G. Jordan for a minimum term of one (1)
     year (or such longer term as may be specified by Energas) but not
     exceeding two years at a salary of US $5,000 per month. Seller agrees
     that all monies payable to Mr. Larry G. Jordan and to other employees of
     the Company will be the sole responsibility of the Company and all such
     monies will not be paid until there is sufficient cash flow of the
     Company to meet and pay all of the other liabilities of the Company as
     they become due."

6. Paragraph 4 ("Representatives, Warranties and Covenants by Seller") is
amended such that the following is inserted as sub-paragraph (q):

     "Financial Statements for the eight month period ended August 31, 2000
     and the year ended December 31, 1999 of the Company (the "Financial
     Statements") shall be delivered by Seller to Energas on or before
     September 30, 2000. Seller agrees to have the Financial Statements
     reviewed by a certified public accountant or, if required by the CDNX
     (as hereinafter defined), audited by a certified public accountant. The
     Financial Statements will be prepared in accordance with generally
     accepted accounting principles in compliance with all applicable laws
     and will be consistently applied, and will be complete and accurate in
     al1 material respects, and give a true and fair view of the affairs and
     financial position of the Company, including without limitation of the
     order of the Oklahoma Corporation Commission authorizing First Natural
     Gas, Inc. to operate as a Utility, (the "Order"). All communications
     from the certified public accountant shall be addressed to Energas and
     to the: Company,"

7. Paragraph 4 ("Representatives, Warranties and Covenant by Seller") is amended
such that the following is inserted as sub-paragraph (r):

                                                                               4

<Page>

     "Seller agrees that the execution and delivery of this Agreement, and
     the performance of the covenants and agreements herein contained, are
     not limited or restricted by or in conflict with, nor will they breach,
     infringe, contravene or interfere with, any contractual, intellectual
     property, privacy, common law, statutory, equitable, confidentiality or
     other rights or obligations of the Company nor will such create any
     obligations for the Company or Energas, including any obligation to post
     a bond in support of the Order."

8. Paragraph 4 ("Representatives, Warranties and Covenants by Seller") is
amended such that the following is inserted as sub-paragraph (s):

     "FNG has all necessary licenses and permits to carry on its business."

9. Paragraph 4 ("Representatives, Warranties and Covenants by Seller") is
amended such that the following is inserted as sub-paragraph (t):

     "All of the foregoing representations, warranties and covenants shall
     survive closing and shall be binding upon Seller after closing."

10. Paragraph 6 ("Conditions Precedent to Obligations of Energas") of the
Agreement is changed to read as follows:

          "CONDITIONS PRECEDENT TO OBLIGATIONS OF ENERGAS. All of the
     obligations of Energas under this Agreement are, at its election,
     subject to the satisfaction, prior to or at the closing, of the
     following conditions:

     (a)  The representations and warranties of Seller contained in this
          Agreement will have been true and correct in all material respects
          and Seller will have performed or complied in all material respects
          with all terms) agreements) and covenants required by this Agreement
          to be performed by him on or prior to the closing date.

     (b)  Seller shall have delivered to Energas certificates of good standing
          issued by the Secretary of State for the State of Oklahoma for the
          Company dated no earlier than fifteen days prior to the closing date,
          and reflecting that the Company is in existence and good standing,
          has filed all required franchise tax returns and has paid all
          required franchise taxes, and reflecting all instruments filed of
          record with respect to the Company through the date of such
          certificate in the Secretary's office.

     (c)  No action or proceeding shall be threatened or be pending against
          Seller or the Company by a third party seeking to restrain or
          prohibit the performance of, or to obtain damages or other relief in
          conjunction with this Agreement or any of the transactions
          contemplated hereby.

     (d)  Since the effective date hereof, no material adverse change shall
          have occurred in the aggregate with respect to the financial
          condition or operations of the Company as a whole.

                                                                               5

<Page>

     (e)  Energas is able to obtain acceptance from the CDNX and from the
          Oklahoma Corporation Commission to this Agreement

     (f)  Energas is able to obtain an exemption order and approval from the
          Commission to allow Energas to distribute the Convertible Note to
          each Seller.

     (g)  Energas receives a favorable legal opinion from its counsel in
          connection with the acquisition by Energas of the Seller's Stock to
          the effect that:

          (i)  no bond must be posted by the Company or its Shareholders to
               maintain the order in good standing; and

          (ii) neither Energas nor its officers or directors will assume any
               obligations or liabilities of the Company, nor will Energas or
               its officers or directors be subject to any obligations or
               liabilities in relation to the business of FNG, arising under
               applicable law.

     Prior to closing, Energas may give Seller written notice that Energas is
     refusing to consummate the purchase of Seller's Stock because anyone or
     more of the above conditions have not been met, in which case neither party
     shall have any further obligation to the other in connection with this
     Agreement. For greater certainty, Energas will not be obligated to
     consummate the purchase of a particular Seller's Stock unless the above
     conditions have been met in respect of all Sellers. If closing occurs and
     at any time thereafter all or portions of Seller's Stock and/or the Assets
     are burdened with liens, mortgages or other encumbrances, and/or if the
     Company has unsecured debt of any nature (other than normal payables to
     trade creditors in the ordinary course of doing business), the total amount
     secured by liens, mortgages or other encumbrances plus the total amount of
     unsecured debt not inclined in the ordinary course of business shall be
     referred to herein as the "Company's Indebtedness". If any Seller timely
     elects to convert his promissory note to Energas stock, on the date of the
     conversion the total amount of principal and interest then payable to
     Seller pursuant to Seller's note shall be automatically reduced by Seller's
     pro rata share of the Company's Indebtedness, said pro rata share being the
     percentage set out after Seller's name in Paragraph 2(a) above. The
     automatic reduction of Seller's note by the amount of Seller's percentage
     of the Company's Indebtedness shall be to the nearest whole dollar. As to
     any seller who does not elect to convert his note to Energas stock, on the
     due date of the note, it shall be automatically reduced by Seller's share
     of the Company's Indebtedness as measured on the due date of the note, with
     "Seller's share" being the percentage set out after Seller's name in
     paragraph 2 of the Company's Indebtedness."

12.  Paragraph 7 ("Closing and Closing Date") of the Agreement IS changed such
     that the first part of paragraph 7 reads as follows:

               "CLOSING AND CLOSING DATE. If, prior to the closing date,
               Energas fails to give written notice of the rejection of the
               sale, as provided in paragraph 6 above, the closing of the
               sale of Seller's Stock by Seller to Energas shall occur at a
               mutually agreeable day and time on or before October 30, 2000
               in the offices of Crowe & Dunlevy in Oklahoma City. At closing
               the following shall be accomplished:

                                                                               6

<Page>

     (a)  Seller shall endorse his stock certificates, representing Seller's
          Stock, over to Energas and entry shall be made in the stock record
          book of the Company to show Energas as the record holder of Seller's
          Stock, effective at 7:00 a.m. on the first day of the calendar month
          when closing occurs,

     (b)  New stock certificates shall be issued in the name of Energas
          showing it to be the owner of Seller's Stock.

     (c)  Energas, then, shall endorse it stock certificate, representing its
          ownership of Seller's Stock, in blank and the endorsed stock
          certificate shall be delivered to an authorized representative of a
          state or federal banking institution, satisfactory to both Seller and
          Energas, said banking institution to act as the escrow agent to hold
          the endorsed stock certificate in escrow pursuant to the terms of this
          Agreement.

     (d)  Seller and Energas, along with a representative of the escrow agent,
          shall execute such escrow agreement as may be required by the escrow
          agent to protect it and to set forth its obligations under the escrow
          a1Tangement

     (e)  Energas shall deliver to Seller the Convertible Note described in
          paragraph 2(a) above, as possibly modified pursuant to the final
          sentence of paragraph 6 above,

     (f)  The original corporate minute books and stock transfer ledgers shall
          be delivered to the escrow agent to be held in escrow with the stock
          certificate.

     (g)  Energas the owner of Seller's Stock, shall, in writing, confirm that
          the present Board of Directors of the Company and the present
          officers of the Company shall continue in their present positions.
          That is, until the convertible Note has either been paid in full or
          converted to Energas stock, as provided for in paragraph 2(a) above,
          the current management of the Company shall be retained. Provided,
          however, George G. Shaw the President of Energas, shall be elected to
          the current Board of Directors."

13.  This Amendment may be executed by the parties in individual counterpart
     copies and if each party executes a counterpart copy, it shall have the
     same effect as if all parties had executed the same copy. Provided,
     however, until all parties have signed a counterpart copy, there shall be
     no agreement.

14. Except for the foregoing amendments, the Agreement remains in full force as
originally written.

15.  This Amendment shall be binding upon and shall ensure to the benefit of the
     respective heirs, devisees, executors, administrators, successors and
     assigns of the parties.

Dated and executed as of the day, month and year first shown above.

                                                                               7

<Page>

                                        ENERGAS RESOURCES INC.

                                        By: /s/  George Shaw
                                            ----------------
------------------------------          George G. Shaw, President
Jim Baker                               The Oil Center
2812 S.W. 111th Street                  2601 N.W. Expressway, Suite 1100-W
Oklahoma City, OK 73170-2448            Oklahoma City, OK 73112

------------------------------          -------------------------------------
Billie Baker                            Keith D. Menees
2812 S.W. 111th Street                  6013 N. May, No. 161
Oklahoma City, OK 73170-2448            Oklahoma City, OK 73112

/s/ Willard L. O'Daniel                 /s/ Jeanne O'Daniel
------------------------------          -------------------------------------
Willard L. O'Daniel                     Jeanne O'Daniel
208 E. Choctaw                          208 E. Choctaw
McAlester, OK 74501                     McAlester, OK 74501

                                        /s/ Marie Sellers
------------------------------          -------------------------------------
Mark R. Hay                             Marie Sellers
5858 Waggoner                           416 Forest
Dallas, TX 75230                        Eufaula, OK 74432

James W. and LaVada Greer Living Trust

By:  /s/ James W. Greer
     ------------------
         James W. Greer, Trustee, and

By:  /s/ Lavada Greer, Trustee
     -------------------------
         LaVada Greer, Trustee
         Rt. 1, Box 708A
         Eufaula, OK 74432

                                                                               8

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