EXHIBIT 10.7
 
                      EXPLORATION JOINT VENTURE AGREEMENT


THIS AGREEMENT made as of the 19th day of February, 1997,

AMONG


               ENCAL ENERGY LTD., a corporation incorporated under 
               the laws of  the Province of Alberta ("Encal")

                                                     THE PARTY OF THE FIRST PART

                                     -and-


               PINNACLE OIL INTERNATIONAL INC., a corporation 
               incorporated under the laws of the State of Nevada 
               ("PINNACLE")

                                                    THE PARTY OF THE SECOND PART

                                     -and-

               THE AFFILIATES, being the individuals or 
               corporations identified in Schedule "A" hereto, 
               having an affiliation to Pinnacle or the SFD 
               Technology (the "AFFILIATES")

                                                     THE PARTY OF THE THIRD PART

     WHEREAS the parties have agreed to enter into this Exploration Joint 
Venture Agreement (the "EJV") for the exploration, development and production of
oil and gas in Western Canada; and

     WHEREAS the Parties have agreed that the EJV shall be carried out pursuant
to the provisions of this Agreement;

                                      -1-

 
     NOW THEREFORE THIS AGREEMENT WITNESS THAT, in consideration of the premises
and the mutual covenants of the Parties herein contained, the Parties hereto 
agree as follows:

1.   Definitions and Schedules

     a)   In this Agreement, unless the context otherwise requires, the
          definitions set forth in Clause 101 of the Operating Procedure, shall
          apply and in addition, the following shall have the following 
          meanings;

          i)    "Accounting Procedure" means Schedule "D" attached to and made 
                part of this Agreement;

          ii)   "Assignment Procedure" means the CAPL 1993 Assignment Procedure
                attached as Schedule "E" hereto which supersedes any conflicting
                clause in the Operating Procedure;

          iii)  "Action" means the court proceedings described in an action
                filed in the British Columbia Supreme Court, Vancouver Registry,
                in File No. C944272, between George Liszicasz, as plaintiff; and
                Alexander Shereshevsky, G.D.M Grand Development Corp., Samuel
                Higgins, also known as Sam Higgins, and Sam J. Higgins, Manon L.
                Walters and Keith Morey, as defendants, and Pinnacle Oil Inc.,
                Pinnacle Oil International Inc. and Manon L. Walters Inc., as
                defendants by counterclaim;

          iv)   "Basis Geophysical Data" means any non-interpreted seismic data,
                processed record sections, seismic tapes, monitor records and
                associated data;

          v)    "Earning Well" means a well drilled, completed or abandoned
                pursuant to Clauses 12(b) or 13(b) as the context requires and
                where such well is drilled pursuant to a Farmin Agreement or and
                Additional Farmin Agreement and where such well earns from a
                third party an interest in Petroleum and Natural Gas Rights;

          vi)   "Exploration Area" means any contiguous area covering up to nine
                (9) township (or NTS survey equivalent) in size, as identified
                by Encal pursuant to Clause 6 hereof with the three Initial
                Exploration Areas identified in Schedule "B" hereto and as
                identified by Encal pursuant to Clauses 7 and 9;

                                      -2-

 
               vii)      "Exploratory Prospect" means the geographic area and
                         appropriate spacing units (including entire spacing
                         units in the case of partial spacing units) covering an
                         SFD Anomaly identified utilizing SFD Technology and
                         qualified in accordance with the provisions of this
                         Agreement;

              viii)      "Facility" means:

                         a)   production facility; or

                         b)   any gas processing plant, gas compressor station,
                              battery, gathering system or production storage
                              facility used in the production of petroleum
                              substances which facility in accordance with
                              industry practice, would be constructed and/or
                              operated pursuant to a separate agreement:

                ix)      "Joint Lands" means joint lands and lands where the
                         Parties have acquired and interest pursuant to the
                         terms of a Farmin Agreement and/or an Additional Farmin
                         Agreement as set forth in Clause 12(b) or 13(b);

                 x)      "Losses" means, in respect of any matter, all claims,
                         demands, proceedings, losses, damages, liabilities,
                         deficiencies, costs and expenses (including, without
                         limitation, all legal and other professional fees and
                         disbursements, interest, penalties and amounts paid in
                         settlement) arising directly or indirectly as a
                         consequence of such matter;

                xi)      "New Lands" means joint lands acquired pursuant to this
                         Agreement excepting those lands acquired pursuant to
                         Clauses 12(b) and 13(b);

               xii)      "Operating Procedure" means the 1990 amended CAPL
                         Operating Procedure attached hereto as Schedule "C" and
                         made part of this Agreement;

              xiii)      "party' or "Parties" means a party to this Agreement;

               xiv)      "Petroleum and Natural Gas Rights" means any documents,
                         issued or which may be issued, by virtue of which a
                         Party is entitled to drill for, win, take or remove
                         petroleum substances underlying lands and all renewals
                         or extensions thereof or documents of title issued
                         thereunder;

                xv)      "Royalty Procedure" means the royalty procedure 
                         attached as schedule "F" and made part of this
                         Agreement.

               xvi)      "Seismic Costs" means, with respect to Basic
                         Geophysical Data, all moneys expended in respect of an
                         Exploratory Prospect for the purchase

                                      -3-

 
                    of seismic data, the shooting and processing or reprocessing
                    of seismic data and collection of information and any other
                    costs associated therewith;

          xvii)     "SFD Anomaly, means an anomalous geological or geophysical
                    feature prospective of containing petroleum substances,
                    initially identified by Pinnacle using SFD Technology and
                    SFD Data:

          xviii)    "SFD Data" means primary signal data derived form SFD 
                    Technology;

          xix)      "SFD Information" means Ground Based SFD Information and
                    Airborne SFD Information collectively or individually as the
                    context requires;

          xx)       "SFD Technology" means stress field detector technology;

          xxi)      "Territory" means Alberta, British Columbia and
                    Saskatchewan;
   
          xxii)     "Wells" means, collectively, Earning Wells, Test Wells,
                    Additional Wells and Subsequent Wells as hereinafter
                    defined.

     b)   Appended hereto are the following schedules:

          A - Affiliates
          B - Initial Exploratory Areas
          C - Operating Procedure
          D - Accounting Procedure
          E - Assignment Procedure
          F - Royalty Procedure
          G - Confidentiality Agreement

2.   Term

     a)   The term of this Agreement ("Term") shall commence as of February 19,
          1997, ("Effective Date") and shall extend for a period of three (3)
          years therefrom which Term may be subsequently extended by the mutual
          agreement of the Parties.

     b)   Provided that this Agreement has not been previously terminated
          pursuant to Clause 19, the Term of this Agreement shall be restarted
          and recommence for a three (3) year period following Pinnacle advising
          Encal that it has the ability to commence and conduct airborne surveys
          utilizing the SFD Technology unless such date is more than four (4)
          years from the Effective Date hereof.

                                      -4-

 
3.   No Warranty of Title

     In the event any Party, subsequent to the date of this Agreement, encumbers
     any interest it now holds or may obtain under this Agreement, the Party
     which encumbers its interest shall be solely responsible for that
     encumbrance, and agrees to indemnify the other Parties to this Agreement
     form any Losses caused by the encumbrance.

4.   Warranty Of Technology

     a)   Pinnacle and each of the Affiliates, jointly and severally, represent,
          warrant and covenant to Encal that the beneficial owner of the SFD
          Technology is Momentum Resources Ltd. ("Momentum") and Momentum has
          granted Pinnacle an exclusive licence for the use of SFD Technology
          for the purpose of generating SFD Data for the exploration of
          petroleum substances.

     b)   Pinnacle and each of the Affiliates, jointly and severally, hereby
          represent, warrant and covenant to Encal that, as of the Effective
          Date and through the Term of this Agreement and any extensions
          thereof, that Pinnacle is and will be the beneficial owner of the SFD
          Data, free and clear of any and all claims, suits, proceedings,
          encumbrances and obligations which may limit or impair its ability to
          utilize the SFD Technology in the manner contemplated hereunder.

     c)   Pinnacle and each of the Affiliates, jointly and severally, hereby
          represent, warrant and covenant with Encal that the conduct of any SFD
          survey and joint operation contemplated by this Agreement does not
          infringe upon the industrial or intellectual property rights, domestic
          or foreign, of any other person and except for the Action, neither
          Pinnacle nor the Affiliates are aware of any claim of any
          infringement or breach of any industrial or intellectual property
          rights of any other person nor have Pinnacle or any the Affiliates,
          received any notice that the conduct of the SFD survey and joint
          operations contemplated in this Agreement, including the use of the
          SFD Technology, infringes upon or breaches any industrial or
          intellectual property rights of any other person.

     d)   Except for the Action, Pinnacle and each of the Affiliates, jointly
          and severally, represent, warrant and covenant with Encal that there
          are no claims, actions, suits or proceedings (whether or not purported
          on behalf of Pinnacle or the Affiliates) pending or to the best of the
          knowledge of Pinnacle or each of the Affiliates, threatened against or
          affecting Pinnacle, the Affiliates or the SFD

                                      -5-

 
          Technology, at law or in equity or before or by any federal,
          provincial, municipal or other governmental department, court,
          commission, board, bureau, agency or instrumentally, domestic or
          foreign, or before or by any arbitrator or arbitration board.

     e)   Pinnacle and each of the Affiliates, jointly and severally, warrant
          and covenant with Encal that the entering into, consummation and
          performance by Pinnacle of this Agreement will not constitute a breach
          of any agreement, contract or licence by which Pinnacle or any
          Affiliate is bound or an infringement upon any intellectual property
          or technology right of any person.

5.   USE OF TECHNOLOGY

     a)   Pinnacle shall provide to Encal a first priority to have Pinnacle
          generate SFD Data on Encal's behalf during the Term of this Agreement
          within the Territory, on the condition that Pinnacle may be entitled
          to enter into up to a maximum of two (2) current joint ventures with
          other parties within the Territory, to generate SFD Data on their
          behalf, which joint ventures may utilize data obtained from the SFD
          Technology in the Territory in areas other than the current
          Exploration Areas; provided however that, in British Columbia, the SFD
          Technology shall be utilized by Pinnacle solely and exclusively for
          generating SFD Data for the benefit of Encal during the Term.

     b)   Encal's first priority to have Pinnacle generate SFD Data on Encal's
          behalf as provide in Clause 5(a) shall mean a first dedication by
          Pinnacle to Encal hereunder of a minimum of 50% of Pinnacle's world
          wide SFD Data generating capacity to be dedicated to the Territory and
          of which a minimum of 75% of Pinnacle's SFD Data generating capacity
          within the Territory is to be first dedicated to Encal. Such first
          dedication shall apply only at the times that Pinnacle has not
          generated the Minimum Prospect Inventory, as hereinafter defined.

     c)   If during the Term of this Agreement, Pinnacle generates SFD Data in
          the Territory that pertains to lands that are not within a current
          Exploration Area or over an area permitted under another joint
          venture, as allowed hereunder, Pinnacle shall present to Encal all SFD
          Anomalies identified by Pinnacle from such data within thirty (30)
          days and the terms and conditions of Clauses 6 or 7

                                      -6-

 
          shall apply and Exploration Prospects resulting therefrom shall form
          part of the Minimum Prospect Inventory referenced in Clause 9 (b).
          Provided, however, Pinnacle shall not be required to present such SFD
          Anomalies or features on any lands that would qualify as Excluded
          Lands pursuant to Clause 8. This Clause 4(b) shall be in effect until
          October 31, 1998.

6.   SFD SURVEY PROGRAM - GROUND SURVEYS

     a)   Encal shall initially select three (3) Exploration Areas within the
          Territory upon which ground based survey work will be conducted by
          Pinnacle, utilizing the SFD Technology ("Ground Based Survey,).
          Pinnacle shall perform the Ground Based Survey on each of these
          Exploration Areas selected by Encal, in the order determined by Encal,
          Pinnacle shall, within thirty (30) days, advise Encal of:

          i)   any safety concerns; or,

          ii)  conflicts with an area forming part of another joint venture as
               provided in Clause 5(a) hereof; or to the knowledge of Pinnacle,
               conflicts with lands held by Pinnacle's partner in such other
               current joint venture, or,

          iii) any concerns Pinnacle has arising in acquiring SFD Information of
               a technical nature as a result of Excluded Lands or any other
               bona fide reason,

          if any, that pertain to the Exploration Areas that Encal selects for
          such Ground Based Surveys. In the event that any of the above
          conflicts or concerns arise, Encal and Pinnacle shall either jointly
          modify the subject Exploration Area or Encal shall select another
          Exploration Area as a substitute.

     b)   On or before September 25, 1997, Pinnacle shall:

          i)   present to Encal visual SFD Data and written interpretations
               thereof collected while conducting the Ground Based Survey,
               provided however, Pinnacle shall not be required to provide to
               Encal copies, in any form, of the SFD Data;

          ii)  provide, at no cost to Encal, copies of all maps, information,
               written reports, interpretations and assessments of Pinnacle
               identifying, in Pinnacle's opinion, all SFD Anomalies, and
               possible Exploratory Prospects; and,

                                      -7-


 
          iii) provide recommendations in respect to all SFD Anomalies
          identified, (i, ii, and iii above are collectively referred to as the
          "Ground Based SFD Information").

     (c)  Upon presentation of the Ground Based SFD Information provided by
          Pinnacle, Encal shall have ninety (90) days to review the Ground
          Based SFD Information and individually accept or reject in writing any
          or all SFD Anomalies or features ("Evaluation Period"). Pinnacle
          agrees during the Evaluation Period to assist Encal in assessing,
          confirming, and the further evaluation of any of the SFD Anomalies.

          Any SFD Anomaly accepted by Encal shall be hereinafter called an 
          Exploratory Prospect.

          There is no maximum to the number of SFD Anomalies that Pinnacle may
          provide Ground Based SFD information on and which may be accepted by
          Encal as Exploratory Prospects.

          In the event that such SFD Anomalies are rejected by Encal, or deemed
          rejected, such SFD Anomalies shall not be subject to this Agreement
          and Pinnacle shall be free to deal with these rejected SFD Anomalies
          as it wishes.

          Encal and Pinnacle shall attempt to jointly prioritize the Exploratory
          Prospects. Encal, as Operator and on behalf of the Parties, shall,
          utilizing conventional oil and gas industry methods use it's best
          efforts to cause further evaluation work to be done on each
          Exploratory Prospect, as prioritized above. Such work shall be for the
          purpose of confirming whether or not a Test Well location should be
          selected and whether or not the drilling of such Test Well is
          warranted (which work may include, but not restricted to further
          qualification and analysis using Basic Geophysical Data available to
          either Encal or Pinnacle).

                                      -8-

 
          Seismic Costs shall be borne jointly, subject to Clause 10(c)(ii), by
          each party, in accordance with the nature of the Test Well being
          drilled under Clause 12 of this Agreement.

     d)   In the event that Encal fails to elect to accept or reject an SFD
          Anomaly within the prescribed time, it shall be conclusively be deemed
          to be a rejection of such SFD Anomaly and as such shall not become an
          Exploratory Prospect.

     e)   In the event that an Exploratory Prospect is subsequently rejected for
          technical reasons by Encal upon its review including any Basic
          Geophysical Data, then the lands with respect to such Exploratory
          Prospect, excepting any Joint Lands, shall not be subject to the terms
          and conditions of this Agreement and Pinnacle shall be free to deal
          with such Exploratory Prospects as it wishes and the Operating
          Procedure shall continue to apply to any Joint Lands within such
          Exploratory Prospect.

     f)   Should Encal, after reasonable effort, be unable to secure, pursuant
          to Clauses 12(b), 12(c), or 21, the Petroleum and Natural Gas Rights
          to any portion of an Exploratory Prospect (which portion represents,
          in Encal's reasonable opinion, the key tracts to drill a Test Well
          such Petroleum and Natural Gas Rights shall be called "the Key
          Tracts"), then Encal shall provide written notice to Pinnacle of such
          event occurring and for the purposes of Clause 9 such Exploratory
          Prospect shall not be considered in calculating the Minimum Prospect
          Inventory as defined in Clause 9 hereof.

          The Parties may continue to attempt to secure the Key Tracts and the
          provisions of Clauses 12(b), 12(c), or 21 shall continue for two (2)
          years from the date of the above mentioned written notice. In
          addition, the specific term set forth in Clause 21(b) with respect to
          the specific Exploratory Prospect shall be deemed to be amended to two
          (2) years from the date of the notice pertaining to the Key Tracts. In
          the event that a Party is unable to secure the Key Tracts for such
          Exploratory Prospect within such two (2) year period, then such
          Exploratory Prospect shall be deemed a rejected Exploratory Prospect
          except for any Joint Lands acquired thereon. In the event that such
          Key Tracts are secured, then

                                      -9-

 
          such Exploratory Prospect shall, for the purposes of Clause 9, be 
          considered in calculating the Minimum Prospect Inventory.

     g)   Should Pinnacle advise Encal, in writing, that it does not wish to
          pursue an Exploratory Prospect, and provided Encal wishes to drill a
          Test Well on such Exploratory Prospect, Encal shall pay Pinnacle an
          amount of twenty thousand ($20,000.00) dollars and the lands in
          respect to the Exploratory Prospect, excepting any Joint Lands, shall
          not be subject to the terms and conditions of this Agreement and Encal
          shall be free to pursue the Exploratory Prospect free and clear of any
          further obligations to Pinnacle or the Affiliates.

     h)   In addition to the foregoing, Pinnacle agrees to provide, exclusively
          to Encal, all leads and/or SFD Anomalies identified by Pinnacle and
          the Affiliates utilizing SFD Technology in the Province of Alberta as
          of the date hereof ("Existing Exploratory Prospects"), which Existing
          Exploratory Prospects shall not be part of the Exploratory Prospects
          required to be provided under Clause 5(c) hereof.

          Encal shall have ninety (90) days from the date upon which this Ground
          Based SFD Information is presented by Pinnacle to Encal in writing to
          determine whether to accept or reject each Existing Exploratory
          Prospect. Each Existing Exploratory Prospect shall, subsequent to
          Encal's acceptance of same, be governed by the provisions of this
          Agreement. In the event that Encal fails to elect to accept or reject
          an SFD Anomaly within the prescribed time, it shall be conclusively be
          deemed to be a rejection of such SFD Anomaly. Upon rejection, or
          deemed rejection, by Encal of an Existing Exploratory Prospect free
          and clear of any further obligations to Encal.

     i)   All information acquired by the Parties as a result of any operations
          on the Exploration Areas shall be considered confidential and for
          their sole and exclusive use and benefit. The Ground Based SFD
          Information shall not be divulged to any party unless the Parties
          first agree in writing to the dissemination thereof. Pinnacle shall
          not, without the written consent of Encal which consent shall not be
          unreasonably withheld, trade, sell or swap the Ground Based SFD
          Information acquired under the terms of this Agreement pertaining to
          an Exploratory Prospect and or an Existing Prospect unless it pertains

                                     -10-

 
          to an Existing Exploratory Prospect and or an Exploratory Prospect
          which has been rejected or deemed to be rejected by Encal.

     j)   The Parties hereto acknowledge that the SFD Technology and all SFD
          Data shall continue to be the sole property of Pinnacle and the
          Affiliates, and shall remain confidential and within the possession of
          Pinnacle and/or the Affiliates.

     k)   Encal agrees that Pinnacle may require each employee of Encal and
          Encal's professional advisors who come into contact with SFD
          Technology to execute a Confidentiality Agreement in the form as
          Schedule "G" attached hereto.

     l)   The Parties hereto acknowledge that any trading rights to Basic
          Seismic Data acquired hereunder shall be owned in the same interests
          as to participation in the initial acquisition of such Basic Seismic
          Data.

7.   SFD SURVEY PROGRAM - AIRBORNE SURVEYS

     a)   Upon Pinnacle advising Encal that Pinnacle is capable of conducting
          airborne surveys utilizing SFD Technology, Encal may initially select
          two (2) additional Exploration Areas within the Territory upon which
          airborne survey work will be conducted by Pinnacle, utilizing SFD
          Technology ("Airborne Survey"). Pinnacle shall perform such survey
          work on each of these additional Exploration Areas selected by Encal,
          in the order determined by Encal. Pinnacle shall, within thirty (30)
          days, advise Encal of:

          i)   any safety concerns; or,

          ii)  conflicts with an area forming part of another joint venture as
               provided in Clause 4(a) hereof; or to the knowledge of Pinnacle,
               conflicts with lands held by Pinnacle's partner in such other
               current joint venture, or,

          iii) any concerns Pinnacle has arising in acquiring SFD Information of
               a technical nature as a result of Excluded Lands or any other
               bona fide reason,

          if any, that pertain to either of the Exploration Areas that Encal
          selects for such Airborne Surveys. In the event that any of the above
          conflicts or concerns arise, Encal and Pinnacle shall either jointly
          modify the subject Exploration Area or Encal shall select another
          Exploration Area as a substitute.

                                     -11-

 
     (b)  On or before the expiration of one hundred and fifty (150) days from
          the date that Encal has selected the Exploratory Areas for the
          Airbourne Survey, Pinnacle shall:

          i)   present to Encal all visual SFD Data and written interpretations
               thereof collected while conducting the Airbourne Survey, provided
               however, Pinnacle shall not be required to provide to Encal
               copies, in any form, of the SFD Data;

          ii)  provide, at no cost to Encal, copies of all maps, information,
               written reports, interpretations and assessments of Pinnacle
               identifying, in Pinnacle's opinion, all SFD Anomalies, and
               possible Exploratory Prospects; and,

          iii) provide recommendations in respect to all SFD Anomalies
          identified, (i, ii, and iii above are collectively referred to as the
          "Airbourne SFD Information").

     c)   Upon presentation of the Airbourne SFD Information provided by
          Pinnacle, Encal shall have ninety (90) days to review the Airbourne
          SFD Information and individually accept or reject in writing any or
          all SFD Anomalies ("Airbourne Evaluation Period"). Pinnacle agrees
          during the Airbourne Evaluation Period to assist Encal in assessing,
          confirming, and the further evaluation of any of the SFD Anomalies.

          There is no maximum to the number of SFD Anomalies that Pinnacle is
          required to provide Airbourne SFD Information on and which may be
          accepted by Encal as Exploratory Prospects.

     d)   All of the provisions of this Agreement shall apply mutatis mutandis,
          to such Exploratory Prospects derived from the Airbourne SFD
          Information and the Airbourne Survey as those provisions which apply
          to the Exploratory Prospects set forth in Clause 6 of this Agreement.

     e)   Notwithstanding Clause 7(b) above, Encal and Pinnacle shall share in
          the cost, on a 50/50 basis, of the daily rate for the airplane used
          for the survey work performed pursuant to this Clause. The current
          estimated gross cost of the daily rate is $3,000.00.

                                     -12-

 
8.   Excluded Lands

     Upon Encal having selected any Exploratory Area, Encal shall advise
     Pinnacle in advance of Pinnacle conducting any survey utilizing SFD
     Technology of any lands within the Exploration Area in which Encal holds or
     is entitled to hold or is negotiating to acquire an interest in Petroleum
     and Natural Gas Rights ("Excluded Lands"). Unless otherwise agreed,
     Pinnacle during the Term:

     a)   shall not be entitled to acquire, farmin, option to farmin, or
          purchase from Encal, or any third party an interest in the Excluded
          Lands; and

     b)   shall not conduct any Ground Based Survey or Airborne SFD Survey upon 
          the Excluded Lands.

9.   Additional Exploration Areas

     During the Term of this Agreement and as a result of the SFD information 
     and associated Exploratory Prospects, it is a requirement of this Agreement
     that at any time after January 1, 1998, either:

     a)   each Exploration Area yield no fewer than three (3) Exploratory 
          Prospects; or

     b)   all Exploration Area yield a total of twenty-five (25) Exploratory
          Prospects (provided Pinnacle is capable of generating Airborne SFD
          information, a minimum of ten (10) of the required twenty five (25)
          Exploratory Prospects must be as a result of Airborne SFD information)
     
     (such number of Exploratory Prospects, as set forth in Sub-clauses (a) or 
     (b) above, is hereinafter referred to as "the Minimum Prospect Inventory").

     In the event that the sum of the Exploratory Prospects is less than the
     Minimum Prospect Inventory, Pinnacle shall commence further Ground Based
     Surveys or Airborne Surveys, as designated by Encal, on an additional
     Exploration Area(s) under the same terms and conditions outlined in this
     Agreement until at least the Minimum Prospect Inventory is achieved, with
     such additional Exploration Areas to be provided on such a "rolling basis" 
     as may be required.

     The provisions of Clauses 6 and/or 7, as the context requires, shall apply 
     to the above mentioned additional Exploration Areas created as a result of
     this Clause.

                                     -13-

 
10.  INTERIM TERM PROVISIONS

     a)   The Parties agree that an interim period (the "Interim Period") shall 
          apply from the date hereof until the earlier of:

          i)   such time as either:

               a)   a minimum of three Test Wells have been drilled, completed
                    and producing or capable of producing petroleum substances
                    of at least one hundred (100) barrels of oil (or an
                    equivalent) per day per each Test Well located on
                    Exploratory Prospects; or

               b)   five (5) Test Well have been drilled on Exploratory 
                    Prospectus; or 

          ii)  one (1) year from the Effective Date

     b)   Subject to any third party Farmin Agreements or Additional Farmin
          Agreements, the Parties agree that Pinnacle shall be entitled to
          release to the public through press releases the results of the
          drilling of Wells on any Exploratory Prospects to comply with
          securities laws, confirm and validate the SFD Technology and to
          assist Pinnacle in raising financing. Pinnacle may disclose in such
          news releases the expected reserves and expected production rates from
          the Wells provided confirmation thereof has been given by independent
          engineers, but will not (without the approval of Encal) release the
          location of such Wells or other matters of a confidential nature which
          might reasonability be expected to affect Encal's ability to conduct
          operations competitively. Pinnacle will not disclose Encal's name in
          any press release without Encal's prior approval.

     c)   Notwithstanding anything herein contained, during the Interim Period:

          i)   Encal shall not, in respect of any Exploratory Prospects,
               propose the drilling of any Test Wells, make any commitments to
               third parties, post any lands for sale at Crown sales, initiate
               any freehold mineral leases, or acquire any lands under
               agreements for purchase and sale, without the agreement of
               Pinnacle;

          ii)  Pinnacle shall have the right not to participate in the
               acquisition of Basic Geophysical Data in respect of an
               Exploratory Prospect, in which case, Encal shall be entitled to
               acquire such Basic Geophysical Data and recover Pinnacle's share
               of Seismic Costs from Pinnacle's share of production from any
               Wells; and

                                     -14-

 
     iii) Pinnacle shall be given the opportunity during a period of ninety (90)
          days from the end of the Interim Period to initiate and complete a
          financing ("Financing Period"). Encal shall endeavour not, without the
          approval of Pinnacle, to initiate any new operations, incur new
          obligations for capital (including AFE's or issue cash calls), or new
          commitments after the end of the Interim Period until the end of the
          Financing Period. In the event Encal for any reason does initiate new
          operations, incur new obligations for capital (including AFE's or
          issue cash calls) during the Financing Period then it is agreed that
          Pinnacle may withhold payment for same until the end of the Financing
          Period.

     iv)  Encal shall use its reasonable efforts to negotiate in third party
          Farmin Agreements, and Additional Farmin Agreements no more onerous
          confidentiality provisions than those provided in Article XVIII of the
          Operating Procedure.

11.  CONVENTIONAL EVALUATION

     Notwithstanding the use of the SFD Information in evaluating the
     Exploration Areas, the Parties hereto agree and acknowledge that any
     Exploratory Prospect (including Existing Exploratory Prospects) evaluated
     under this Agreement shall have been evaluated using such geological,
     geophysical, engineering, mapping, seismic and technological data or
     information, including without limitation the Basic Geophysical Data,
     available to either Encal or Pinnacle in addition to the SFD Information
     such that any successes or failures in drilling on an Exploratory Prospect
     shall be attributed to all of the information and data utilized evaluating
     and determining the Exploratory Prospect.

12.  DRILLING OF WELLS

     During the Term of this Agreement:

     a)   Upon Encal having completed the evaluation work as described in Clause
          6(c), Encal may select a location for the drilling of a well on an
          Exploratory Prospect and if such well is the first well to be drilled
          on an Exploratory Prospect pursuant to this Agreement it shall be
          referred to as the "Test Well". In the event that Encal wishes to
          drill a Test Well, Encal shall serve written notice to Pinnacle ("Test
          Well Notice") including a reasonable estimate of Test Well costs and
          an

                                     -15-

 
     estimate of the timing of the advance of funds. Pinnacle shall then elect
     by written notice to Encal on or before the expiration of fifteen (15) days
     from receipt of the Test Well Notice to either:
     
     i)   elect to participate in the drilling of the Test Well; or

     ii)  elect not to participate in the drilling of the Test Well.

     Should Pinnacle elect to participate in the drilling of a Test Well, Encal
     shall commence, or cause to be commenced, the drilling of such Test Well on
     the Exploratory Prospect as provided herein or pursuant to any agreement
     entered into with third parties by Encal, on behalf of Encal and Pinnacle.

     Should Pinnacle elect not to participate in the drilling of the Test Well 
     the provisions of Clause 6(g) shall come into effect.

     During that period of time prior to Pinnacle's election to participate
     Encal shall assist Pinnacle in the review of the proposed Test Well
     location.

     In the event that Pinnacle fails to elect to participate in the drilling of
     a Test Well within the prescribed time, it shall be conclusively be deemed
     to be an election not to participate.

b)   In the event that Petroleum and Natural Gas Rights within an Exploratory
     Prospect are held by third parties to this Agreement ("Third Party Lands")
     and Encal is required to commit to conduct certain obligations, including
     but not restricted to seismic programs, purchases of seismic, or the
     drilling of Earning Wells (such obligations are collectively referred to as
     "Obligations") which may be required to earn an interest or the right to
     earn an interest in the Third Party Lands, Encal may negotiate and enter
     into agreements with third parties ("Farmin Agreements"). In the event that
     Encal enters into a Farmin Agreement, Encal shall serve written notice to
     Pinnacle of Encal entering into such Farmin Agreement ("Farmin Notice")
     including a reasonable estimate of Obligations and an estimate of the
     timing of the advance of funds. Such notice shall include such

                                     -16-


 
          information necessary to evaluate such Obligations. Pinnacle shall
          then elect by written notice to Encal on or before the expiration of
          fifteen (15) days from receipt of the Farmin Notice to either:

               i)   elect to participate in the Obligations; or

               ii)  elect not to participate in the Obligations.

          Should Pinnacle elect to participate in the Obligations, the cost,
          risk and expense of the Obligations and the interest earned in the
          Third Party Lands subject to the Farmin Agreements shall be shared by
          the Parties in the following proportions:

               Encal          75%

               Pinnacle       25%

          Should Pinnacle elect not to participate in the Obligations, the Third
          Party Lands and the relevant Exploratory Prospect with the exception
          of any Joint Lands shall not be subject to the terms and conditions of
          this Agreement. The cost, risk, expense, any Petroleum and Natural Gas
          Rights earned, or benefit derived therefrom shall be for Encal's own
          account.

          During that period of time prior to Pinnacle's election to participate
          Encal shall assist Pinnacle in the review of the Obligations.

          In the event that Pinnacle fails to elect to participate in
          Obligations within the prescribed time, it shall be conclusively be
          deemed to be an election not to participate.

   c)  Provided Pinnacle elects to participate in a Test Well, the cost risk and
       expense associated with each Test Well shall be borne by the Parties in
       accordance with their interest in the Test Well Spacing Unit unless
       otherwise provided herein. For clarity sake the interests of the Parties
       shall be generally shared in the following proportions:

                                     -17-

 
          ii)  if lands acquired pursuant to Clause 21 c(ii) then:

                     Encal             70%
                     Pinnacle          30%

          ii)  if lands acquired pursuant to Clauses 12(b) and 13(b) or 21 (c) 
               (i), then:

                     Encal             75%
                     Pinnacle          25%

     d)   For the purposes of Clause 9 inter alia, upon an Exploratory Prospect 
          having been evaluated by the drilling of a Test Well such Exploratory 
          Prospect shall be considered proven ("Proven Prospect") and shall no 
          longer be considered an Exploratory Prospect.

13.  DEVELOPMENT OF PROVEN PROSPECTS

     a)   During the Term of this Agreement and for one (1) year thereafter,
          where further wells are proposed in order to fully develop the
          potential of a Proven Prospect which wells are located on Joint Lands
          earned as a result of a Farmin Agreement ("Additional Well"). Encal
          shall serve written notice to Pinnacle of the Additional Well 
          ("Additional Well Notice"). Such Additional Well Notice shall include
          such information necessary to evaluate such Additional Well including
          a reasonable estimate of Additional Well costs and an estimate of the
          timing of the advance of funds. At Pinnacle's option and exercisable
          by written notice to Encal on or before the expiration of fifteen (15)
          days from the date such Additional Well is proposed, Pinnacle may
          elect to:

          i)   participate in the drilling of such Additional Well; or

          ii)  not to participate in such Additional Well.

          In the event that Pinnacle elects to participate in the drilling of
          such Additional Well, then the operating provisions of the Farmin
          Agreement or the Operating Procedure, whichever agreement governs the
          relationship of the Parties hereto, shall apply to such Additional
          Well.

          In the event Pinnacle elects not to participate in such Additional
          Well, then for the purposes of such Additional Well and as between the
          Parties hereto, the

                                     -18-

 
          provisions of Clauses 1007, 1009, 1013, 1017, and 1020 of the
          Operating Procedure shall apply to such Additional Well with the
          percentages set forth in Clause 1007 (iv) of the Operating Procedure
          to be 150% and with the statement provided in Clause 1013 (a) of the
          Operating Procedure to be provided annually.

     b)   Where further wells may be required to earn Third Party Lands
          comprising a portion of a Proven Prospect pursuant to a Farmin
          Agreement or should Encal negotiate and enter into new agreements with
          third parties ("Additional Farmin Agreement") to drill further wells
          to earn Third Party Lands (such well shall be referred to as the
          "Additional Earning Well"), Encal shall serve written notice to
          Pinnacle of the Additional Earning Well ("Earning Well Notice"). Such 
          Earning Well Notice shall include such information necessary to 
          evaluate such Additional Earning Well including a reasonable estimate 
          of Additional Earning Well costs and an estimate of the timing of the 
          advance of funds. Pinnacle shall then elect by written notice to Encal
          on or before the expiration of fifteen (15) days from receipt of the 
          Earning Well Notice to either:

          i)   elect to participate in the Additional Earning Well; or

          ii)  elect not to participate in the Additional Earning Well.

          Should Pinnacle elect to participate in the Additional Earning Well,
          the cost, risk and expense of the Additional Earning Well and the
          interest earned in the Third Party Lands subject to the Farmin
          Agreement or the Additional Farmin Agreement shall be shared by the
          Parties in the following proportions:

               Encal               75%
               Pinnacle            25%

          Should Pinnacle elect not to participate in the Additional Earning
          Well; such Third Party Lands shall not be subject to the terms and
          conditions of this Agreement. The cost, risk, expense, any Petroleum
          and Natural Gas Rights earned, or benefit derived therefrom shall be
          for Encal's own account.

          During that period of time prior to Pinnacle's election to participate
          Encal shall assist Pinnacle in the review of the Additional Earning
          Well.

                                     -19-

 
          In the event that Pinnacle fails to elect to participate in the
          Additional Earning Well within the prescribed time, it shall be
          conclusively be deemed to be an election not to participate in such
          Additional Earning Well.

     c)   During the Term of this Agreement and for one (1) year thereafter and
          where the drilling of a Test Well leads to the drilling of subsequent
          wells ("Subsequent Wells") on previously acquired New Lands within a
          Proven Prospect, and Encal wishes to drill a Subsequent Well, Encal
          shall serve written notice to Pinnacle ("Subsequent Well Notice")
          including a reasonable estimate of Subsequent Well costs and an
          estimate of the timing of the advance of funds. Pinnacle shall then
          elect by written notice to Encal on or before the expiration of
          fifteen (15) days from receipt of the Subsequent Well Notice to
          either:

          i)   elect to participate in the drilling of the Subsequent Well; or

          ii)  elect not to participate in the drilling of the Subsequent Well.

          Should Pinnacle elect to participate in the drilling of a Subsequent
          Well, all operations pertaining to such Subsequent Well shall be
          governed pursuant to the provisions of the Operating Procedure.

          Should Pinnacle elect not to participate in the drilling of a
          Subsequent Well, Encal shall pay Pinnacle's share of the drilling
          costs, completion costs, equipping costs, lessor royalties,
          encumbrances which would normally be borne by the Joint Account, and
          operating costs associated with such Subsequent Well.

          During that period of time prior to Pinnacle's election to participate
          Encal shall assist Pinnacle in the review of the proposed Subsequent
          Well.

          In the event that Pinnacle fails to elect to participate in the
          drilling of a Test Well within the prescribed time, it shall be
          conclusively be deemed to be an election not to participate.

     d)   In the event Pinnacle has elected not to participate in a Subsequent
          Well, the Parties acknowledge that Encal is not entitled to, nor is
          Pinnacle obligated to

                                     -20-

 
assign, the interest of Pinnacle in that portion of the New Lands comprising 
such Subsequent Well Spacing Unit. The provisions of this Sub-clause are in lieu
of Article X of the Operating Procedure.

Prior to Payout, as hereinafter defined, Encal shall, however, be entitled to 
all of Pinnacle's share of production from the Subsequent Well or allocated to 
the Subsequent Well Spacing Unit until that point in time where the Subsequent 
Well is abandoned or when the gross proceeds of the sale of petroleum substances
produced and sold from the Subsequent Well or allocated to the Subsequent Well 
Spacing Unit equals, without duplication, the sum of:

i)      drilling costs;                                                      
ii)     completion costs;                                                    
iii)    equipping costs;                                                     
iv)     operating costs;                                                     
v)      gathering, processing and marketing fees;                            
vi)     lessor's royalties;                                                  
vii)    encumbrances which would normally be borne by the joint Account; and 
viii)   the Overriding Royalty                                                
(hereinafter referred to as "Payout).

During the period prior to Payout, Encal agrees to calculate and pay to Pinnacle
the Overriding Royalty in accordance with Schedule "F" which schedule shall be 
deemed separately executed by the Parties. The aforementioned Overriding Royalty
shall be calculated and payable on the combined interest of Pinnacle and Encal 
in the Subsequent Well Spacing Unit.

Encal shall give written notice as soon as reasonably possible to Pinnacle, for 
each subsequent Well drilled and completed, setting forth the costs set out in 
items (i) to (viii) inclusive above.

At Payout on a well by well basis, Encal shall serve written notice to Pinnacle 
that each such Subsequent Well has reached Payout whereupon the Overriding

                                     -21-


 
          Royalty shall be terminated. Thereafter such Subsequent Well shall be 
          held for the Joint Account as if Pinnacle participated in such 
          Subsequent Well..

     e)   Until Payout, Encal shall supply Pinnacle, annually with a statement 
          showing the status of Payout of the appropriate Subsequent Well.

     f)   The termination of the Overriding Royalty shall be deemed effective as
          and from the first day of the month following the date of Payout.
     
     g)   In the event that Pinnacle elects not to participate in the drilling 
          of any Subsequent Well, Encal agrees to afford to Pinnacle the same 
          rights and privileges reserved to a participating party including the 
          right to take over a Subsequent Well if abandonment is proposed.

14.  Operator

     a)   Encal is hereby appointed Operator of the EJV and agrees that it shall
          not delegate or assign any of its duties during the Term of this 
          Agreement without the prior consent of Pinnacle, which consent shall 
          not be unreasonably or arbitrarily withheld.

     b)   Encal, as Operator of the EJV, shall make all decisions relating to 
          the management and control of the EJV subject to the terms of this 
          Agreement and the agreement of Pinnacle where expressly required 
          hereunder with Encal's reasonable discretion, which shall be exercised
          in good faith in a workmanlike manner in accordance with good oil and
          gas field practice, and which shall be final and binding on the 
          Parties, except as otherwise provided in this Agreement. Subject to 
          the foregoing, the Operator shall:

          i)   explore, develop, manage and operate oil and gas properties;

          ii)  conduct preparatory exploration on behalf of the Parties, which
               shall include (but not be limited to subsurface mapping, prospect
               /play purchases, geophysical field surveys, the collection of 
               Basic Geophysical Data together with the necessary 
               interpretations as may from time to time be necessary);

          iii) select drill sites and arrange for the drilling of the Wells 
               thereon and produce and sell petroleum substances from the 
               respective accounts of the Parties; it being understood that 
               Encal is not warranting that

                                     -22-

 
                petroleum substances will be sold, only that it shall use its 
                best efforts to market such petroleum substances on the same 
                terms and conditions as it markets its own share;

          iv)   enter into agreements on behalf of the Parties to the EJV for
                the drilling, participation, development, pooling, farmin,
                farmout, unitization, joint venture and production of petroleum
                substances and for the gathering, processing, transportation and
                sale of same;

          v)    carry insurance, as specified in Clause 311(B) of the Operating 
                Procedure on behalf of the Parties as a charge to the joint 
                account;

          vi)   vote as one on behalf of both Encal and Pinnacle in all matters 
                arising from EJV activities;

          vii)  give receipts, releases and discharges on behalf of the Parties
                hereto;

          viii) prior to commencing the drilling of any Well, to review the 
                title of the appropriate holder of the Title Document in 
                accordance with industry standards; and
     
          ix)   charge overhead and such other costs recoveries to the Parties 
                as are provided in the Accounting Procedure attached to the 
                Operating Procedure, without duplication.

15.  FACILITIES AND MARKETING

     a)   Provided a Well is capable of production of petroleum substances in 
          paying quantities, Encal shall use its best efforts to promptly cause
          each of the Wells that have been drilled, completed and equipped under
          this Agreement, to be connected to Encal's or third party's 
          Facilities. Encal agrees to produce and market Pinnacle's share of
          petroleum substances produced from the Wells and, in addition to the
          provisions of this Clause, the provisions of Article VI of the 
          Operating Procedure shall apply thereto. Encal shall not, except for 
          lack of market, shut-in the Wells or reduce production rates as will 
          result in such Wells producing less than their fair and equitable 
          share of recoverable reserves from any reservoir from which Encal's 
          other wells are producing, to the disadvantage or detriment of 
          Pinnacle.

     b)   With respect to those Facilities in which Encal does not have any 
          ownership interest, Pinnacle shall be charged the actual cost for 
          storage gathering,

                                     -23-

 
          processing, transporting, treating, compressing, absorption or other
          plant extraction or stabilization of Pinnacle's share of petroleum
          substances.
          
     c)   With respect to those Facilities in which Encal does have an ownership
          interest and subject to any agreements with third parties, Pinnacle
          shall be charged a reasonable fee sufficient to cover the costs for
          the storage, gathering, processing, transporting, treating,
          compression, absorption or other plant extraction or stabilization of
          Pinnacle's share of Petroleum substances which fee shall also include
          a reasonable rate of return on capital investment.

     d)   Notwithstanding the provisions of Article VI, Clause 601 of the
          Operating Procedure, Pinnacle hereby agrees to dedicate Pinnacle's
          share of production of Petroleum Substances from the Lands to Encal
          who shall undertake to market Pinnacle's share of production on the
          same terms as Encal markets its own share of production, subject to
          the provisions of Article VI, Clause 604, election "A".

     e)   If at any time during the Term of this Agreement a party (in this
          Clause called "the Proposing Party") wishes to construct new
          Facilities for the treating, processing, or transportation of
          petroleum substances from the New Lands and/or any other lands which
          lands subject to this Agreement, it shall afford to the other party an
          opportunity to participate in such project on an equitable basis. The
          Proposing Party shall provide to the other party the background
          information the Proposing Party deems reasonably necessary for the
          other parties to evaluate the project and make a decision. The Parties
          recognize that until a proposal is made it is not possible to
          determine the terms of such participation, however, each party agrees
          that it will act in good faith in carrying out the terms of this
          Clause.


16.  Meetings and Reporting

     Upon completion of the SFD survey and the acceptance and evaluation of the
     Exploratory Prospects, Encal shall provide Pinnacle with an outline of the
     Wells to be drilled and new Facilities to be constructed. It is
     acknowledged that such outline shall not be binding and may be subject to
     revision from time to time. At two (2) month intervals thereafter, Encal
     shall provide outlines for the EJV Wells scheduled to be drilled in each
     successive calendar quarter during the Term. Beyond the Term, the

                                     -24-



 
     Parties shall consult to determine the most efficient and reasonable method
     of scheduling further operations.

17.  INCORPORATION OF THE OPERATING AGREEMENT

     a)   Provided Pinnacle has elected not to participate in the drilling of a
          Subsequent Wells pursuant to Clauses 13(a) and 13(c) of this
          Agreement, then the following clauses of Schedule "C" ("Operating
          Procedure") shall apply, mutatis mutandis, to this Agreement and to
          all operations of Encal as between Encal and Pinnacle for such wells
          drilled thereunder. Where the terms of this Agreement and the
          Operating Procedure conflict, the terms of this Agreement shall
          prevail. Where the Operating Procedure makes reference to "Operator"
          the word "Encal" is substituted and similarly, "Joint Operator" is
          substituted by "Pinnacle" and "this Operating Procedure" is
          substituted by "this Agreement".

               304   Proper Practices in Operations   
               305   Books, Records and Accounts      
               306   Protection from Liens            
               307   Joint-Operator's Right of Access 
               308   Surface Rights                    
               309(a)Maintenance of Title Documents  
               311   Insurance
               501   Accounting Procedure                                      
               701   Pre-Commencement Information (excluding 701 (a))          
               702   Drilling Information and Privileges of Joint-Operators    
               703   Logging and Testing Information to Joint-Operators        
               704   Completion and Production Information to Joint-Operators  
               705   Well Information Subsequent to Completion                 
               706   Data Supplied in Accordance with Industry Standards       
               801   Velocity Surveys and Other Geophysical Tests              

               ARTICLE 11 Quit Claims                                         

               1601  Definition of Force Majeure                               
               1602  Suspension of Obligation Due to Force Majeure            
               1603  Obligation to Remedy                                       

                                     -25-

 
               1604 Exception for Lack of Finances

               1801 Information to be Kept Confidential

     b)   Subject to the terms of this Agreement, the Operating Procedure shall
          apply to operations conducted in respect of the exploration,
          development and maintenance of any Joint Lands, between and among the
          Parties hereto.

     c)   In the event that the Parties are parties to an existing agreement
          involving third parties ("Third Party Agreement") and where the Third
          Party Agreement conflicts with the Operating Procedure, the Third
          Party Agreement shall prevail.

18.  Indemnification

     a)   The Parties hereto shall, in proportion to their respective
          participating interests in the EJV, hereby indemnify and hold harmless
          the Operator from and against any and all actions, suits, claims and
          demands made by any person or persons whomsoever, other than the
          Parties hereto, in respect of any loss, injury, damage or obligation
          to compensate arising out of or in any way connected with the carrying
          out by the Operator of its duties and obligations in accordance with
          the provisions of this Agreement, except when the Operator is found to
          be grossly negligent.

     b)   Pinnacle indemnifies Encal against any and all Losses which may be
          incurred or suffered by Encal or which may be sustained, paid or
          incurred by reason of or in any way attributable to the operations
          carried on in respect of the SFD survey by Pinnacle, its servants,
          agents or employees under this Agreement.

     c)   Pinnacle and each of the Affiliates jointly and severally indemnifies
          Encal against any and all Losses which may be incurred or suffered by
          Encal or which may be sustained, paid or incurred by reason of or in
          any way attributable to the breach of one or more of the
          representations, warranties or covenants made by Pinnacle and each of
          the Affiliates under Clause 4 hereof, whether such a breach occurs
          prior to or during the Term of this Agreement, such an indemnity to
          continue for a period of five (5) years following the termination of
          this Agreement.

                                     -26-

 
19.  Default and Termination.

     a)   If either Party fails to perform any obligation required to be
          performed hereunder, the non-defaulting Party may give the defaulting
          party notice to remedy the default, and if the defaulting Party does
          not commence to remedy the default within thirty (30) days after
          receiving the notice and proceed diligently and continuously to remedy
          it, the non-defaulting Party may by notice to defaulting Party in
          writing terminate this Agreement.

     b)   If, as a result of the Action or any breach of the representations,
          warranties and covenants contained in Clause 4 hereof, whether such a
          breach is the result of the actions of Pinnacle or any of the
          Affiliates, or if Pinnacle or any of the Affiliates is no longer
          entitled to the SFD Technology and the right to utilize the SFD
          Technology is granted to any other third party, Encal may terminate
          this Agreement by providing written notice of same to Pinnacle.

     c)   In the event that Encal fails to drill twenty-five (25) Wells within
          the Term, which Wells shall (subject to reasonable extensions for
          delays due to drill rig availability and surface access or the
          failure of Pinnacle to agree to operations or acquisitions proposed by
          Encal during the Interim Period) be drilled as follows:

                         1st Year       5 Wells
                         2nd Year       8 Wells     
                         3rd Year      12 Wells

          Pinnacle may terminate this Agreement by providing written notice of 
          same to Encal.

     d)   In the event that this Agreement is terminated as provided in this
          Clause, any Joint Lands shall continue to be governed by the Operating
          Procedure or applicable third party agreement.

20.  Transfer     

     Each Party shall not transfer this Agreement or any interest, right or
     obligation under this Agreement, except in accordance with the provisions
     of Clause 2401 (B) of the Operating Procedure, provided that for the
     purpose of Clause 2401 (B) of the Operating Procedure, Affiliates may
     include a limited partnership where Pinnacle or Pinnacle Oil

                                     -27-


 
     Canada Ltd. is the general partner of such partnership. Any assignment of 
     interest shall be in accordance with the Assignment Procedure attached as
     Schedule "E" hereto.

     Notwithstanding any assignment made by Pinnacle to an Affiliate, during the
     Term of this Agreement, Encal need only look to Pinnacle for performance of
     the duties and obligations of Pinnacle pursuant to this Agreement.

21.  AREA OF MUTUAL INTEREST

     a)   In this Clause the expression "AMI Lands" means any Petroleum And 
          Natural Gas Rights, or either of them, which are laterally and/or 
          diagonally within one (1) mile of the lands encompassing any 
          Exploratory Prospect, other then lands acquired pursuant to Clauses 
          12(b) and 13(b).

     b)   On an Exploratory Prospect by Exploratory Prospect basis, the
          provisions of this Clause relating to the acquisition of any AMI Lands
          shall:

          i)   for AMI Lands not encompassing the Exploratory Prospect, be 
               effective for that period commencing on the date of acceptance, 
               in writing, by Encal of an Exploratory Prospect and terminating
               one (1) year thereafter, and;

          ii)  for AMI Lands encompassing the Exploratory Prospect, be effective
               for the Term of the Agreement or the period in b (i) above 
               whichever is longer.

     c)   If any AMI Lands become available for acquisition by Crown sale (the 
          "New Crown Lands") and if one of the Parties desires to acquire an 
          interest in the New Crown Lands, the Parties shall consult at least 
          forty-eight (48) hours prior to the final hour at which bids are 
          accepted for the sale of the New Crown Lands for the purpose of
          attempting to reach an agreeable bid price. If, after consultation
          between the Parties, agreement is reached, Encal shall submit the bid
          on behalf of the Parties and if the New Crown lands are acquired, they
          shall be paid for, owned and held by the acquiring Parties in the 
          following interests ("Participating Interests"):

          i)   if a Test Well has been drilled or is being drilled pursuant to 
               Clause 12(b), subject to any third party participation:

                                     -28-

 
                    Encal             75%
                    Pinnacle          25%; or

          ii)  in all other cases, subject to any third party participation:

                    Encal             70%
                    Pinnacle          30%

     d)   Subject to Sub-clause (e), if agreement is not reached as to a bid
          price, then the New Crown Lands so acquired shall be paid for, owned
          and held by the party acquiring the New Crown Lands.

     e)   If, after any consultation at which an agreed bid price is not reached
          by all Parties, any party acquires the New Crown Lands at a price
          which differs by more than five percent [5%] from the price it was
          prepared to agree to for acquisition, or if a party acquires the New
          Crown lands without consulting with the other party or without
          disclosing the price it was prepared to pay for the acquisition, the
          acquiring party shall immediately give notice to the other party
          setting forth the consideration paid. Any party receiving the notice
          shall have the right for a period expiring ten (10) days from the
          receipt of the notice to elect to acquire its Participating Interest
          in the New Crown Lands acquired by paying to the acquiring party its
          proportionate share of the acquisition costs. If this right is
          exercised, the New Crown Lands shall be held and owned by the Parties
          acquiring and the parties electing to acquire their proportionate
          interest in the proportion that their respective Participating
          Interests bear one to the other as set forth in Sub-clause (b)(i) or
          (b)(ii), whichever is applicable. The interest acquired shall be held
          by the acquiring party on behalf of all Parties until the expiry of
          the ten (10) day period.

     f)   On acquisition of AMI Lands more than one Party, if the AMI Lands are
          not already subject to an agreement that provides for their joint
          operation, an agreement in the form of the Operating Procedure shall
          be deemed immediately to become effective to govern the relationship
          among the Parties and to provide for the maintenance and operation of
          the AMI Lands. Encal shall be the Operator unless Encal does not
          acquire an interest in the AMI Lands, in which event the Parties who
          have acquired an interest shall appoint an operator in the

                                     -29-

 
          manner provided for the appointment of a new operator in the Operating
          Procedure.

     g)   Provided that both Encal and Pinnacle acquire their Participating
          interests in the AMI Lands, any Wells drilled on the AMI Lands, except
          any Test Well, shall be deemed Additional Wells under this Agreement
          and, as such, the provisions of Clause 13(a) shall apply mutandis
          mutatis to such an Additional Well.

     h)   A Party submitting a bid under the provisions of this Clause shall
          comply with all combines and anti-competition laws and shall make
          known to the person calling for or requesting the bids or tenders at
          or before their time when any bid or tender is made, the names of all
          Parties who have agreed to submit a bid or tender.

     i)   If any Party acquires an interest (or the right to acquire an
          interest) in any lands other than New Crown Lands as provided in Sub-
          clause (c) above or Petroleum and Natural Gas Rights as set forth in
          Clauses 12(b) or 13(b) and fifty percent (50%) or more (by surface
          area and title document) of the lands so acquired are situated within
          the Area of Mutual Interest, the acquiring Party shall notify the
          other Party thereof within fifteen (15) days of the acquisition,
          detailing the consideration paid or payable therefor and the
          obligations undertaken by the acquiring party with respect to the said
          acquisition. The other Party shall have ten (10) days from receipt of
          the notice of acquisition within which to elect to participate in the
          said acquisition to the extent of the percentage interest set forth
          opposite its name in Sub-clause (c)(i) or (c)(ii) above, which ever is
          applicable, by paying to the acquiring party pursuant to the said
          acquisition.

22.  Exclusions to the EJV

     Notwithstanding anything contained herein, the following are specifically 
     excluded from this Agreement:

     a)   the acquisition of any interest in corporations, partnerships,
          affiliates or other legal entities as such by the purchase of an
          equity interest therein or merger therewith and any duties,
          obligations or acquisitions resulting therefrom where the AMI Lands
          are not the primary purpose of the acquisition;

     b)   any interests held by Encal and its joint operators as Excluded lands;
          or

                                     -30-

 
     c)   the purchase of any oil and gas reserves (whether proven or probable
          reserves) unless subsequently deemed included by mutual agreement of
          the Parties.

23.  NOTICES

     a)   The addresses for service and the fax numbers of the Parties shall be
          as follows:

          Encal -             Encal Energy Ltd.
                              1800, 421 - 7th Avenue S.W.
                              Calgary, Alberta
                              T2P 4K9

                              Attention: Manager, Land
                              ------------------------

                              Fax: (403)266-6648

          Pinnacle -          Pinnacle Oil International Inc.
                              1090 West Georgia Street
                              Vancouver, B.C.
                              V6E 3V7

                              Attention: President
                              --------------------

                              Fax: (604)893-8644

     b)   All notices, communications and statements required, permitted or
          contemplated hereunder shall be in writing, and shall be delivered as
          follows:
     
          i)   by personal service on a party at the address of such party set
               out above, in which case the item so served shall be deemed to
               have been received by that party when personally served;

          ii)  by fascimile transmission to a party to the fax number of such
               party set out above, in which case the item so transmitted shall
               be deemed to have been received by that party when transmitted
               with answer back received; or

          iii) except in the event of an actual or threatened postal strike or
               other labour disruption that may affect mail service, by mailing
               first class registered post, postage prepaid, to a party at the
               address of such party set out above, in which case the item so
               mailed shall be deemed to have been received by that party on the
               fifth (5) business day following the date of mailing.

     
                                     -31-

 
     c)   A Party may from time to time change its address for service or its
          fax number or both by giving written notice of such change to the
          other Party.

24.  Miscellaneous

     a)   Each Party shall perform the acts and execute and deliver the deeds
          and documents and give the assurances as shall be reasonably required
          in order fully to perform and carry out and give effect to the terms
          of this Agreement.

     b)   A waiver of any breach of a provision of this Agreement shall not be
          binding on any Party unless the waiver is in writing and the waiver
          shall not affect the Party's rights with respect to any other or
          future breach.

     c)   All terms and provisions of this Agreement shall run with and be 
          binding on the lands referred to during the Term of this Agreement.

     d)   Time is of the essence in this Agreement.

     e)   This Agreement shall enure to the benefit of and be binding on the
          Parties and their respective heirs, executors, administrators,
          successors and assigns.

     f)   The terms of this Agreement express and constitute the entire
          agreement between the Parties and no implied covenant or liability of
          any kind is created or shall arise by reason of these presents or
          anything in this Agreement contained.

     g)   This Agreement supersedes and replaces all previous agreements,
          whether written or oral, memoranda or correspondence between the
          Parties with respect to the subject matter of this Agreement.

     h)   Wherever in this Agreement the singular number or masculine gender 
          occurs, the same shall be respectively construed as the plural or 
          neutral, and vice versa, as the context or reference may require.

     i)   All schedules attached to this Agreement are incorporated by reference
          as though contained in the body of it. Wherever any term or
          conditions, expressed or implied, of any schedule conflicts or is at a
          variance with any term or condition of this Agreement, the term or
          condition of this Agreement shall prevail.

     j)   The headings of all Clauses in this Agreement are inserted for
          convenience of reference only and shall not affect the construction of
          it.

     k)   The terms of this Agreement shall be governed exclusively by the law
          in force from time to time in the Province of Alberta and the Parties 
          hereto agree to

                                     -32-

 
          submit to the jurisdiction of the Courts of the Province of Alberta in
          respect of any claims, actions or proceedings resulting from this 
          Agreement.

     1)   This Agreement may be executed in counterpart and the executed 
          counterparts shall constitute one agreement.

IN WITNESS WHEREOF the Parties have executed this Agreement as of the day and 
year first written above.

ENCAL ENERGY LTD.                            PINNACLE OIL INTERNATIONAL INC.

Per: /s/ D.D. Johnson                        Per:_______________________________
     ----------------------------                
     D.D JOHNSON, PRESIDENT


Per: /s/ P.A. CARWARDINE                     Per: [SIGNATURE ILLEGIBLE]
     ----------------------------                -------------------------------
         P.A. CARWARDINE 
     V.P. LAND & CORPORATE DEVELOPMENT  

                                             PINNACLE OIL INC.

                                             Per:_______________________________


                                             Per: [SIGNATURE ILLEGIBLE]
                                                 -------------------------------

                                             /s/ George Liszicasz
_________________________________            -----------------------------------
Witness                                      GEORGE LISZICASZ


                                             /s/ Dirk R. Stinson
_________________________________            -----------------------------------
Witness                                      DIRK R. STINSON


MOMENTUM RESOURCES LTD.                      PINNACLE OIL CANADA LTD.


Per: ____________________________            Per: ______________________________


Per:     [SIGNATURE ILLEGIBLE]               Per:     [SIGNATURE ILLEGIBLE]
    -----------------------------                -------------------------------

                                     -33-