<PAGE>   1
 
                                                                   EXHIBIT 10.26
 
     Portions of this Exhibit have been omitted pursuant to a request for
confidential treatment. The omitted portions, marked by an * and [     ], have
been separately filed with the Commission.
 
                           CONDITIONAL SALE AGREEMENT
 
             THIS AGREEMENT made as of the 19th day of June, 1997,
 
BETWEEN:
 
         VENTURE SEISMIC LTD., a body corporate having its head office
         at
         3110 - 80th Avenue S.E., Calgary, Alberta, Canada T2C 1J3
         (hereinafter called the "Purchaser")
 
                                   -- and --
 
         GEO-X SYSTEMS LTD., a body corporate having its head office at
         900, 425 - 1st Street S.W., Calgary, Alberta, Canada T2P 3L8
         (hereinafter called the "Vendor")
 
WHEREAS:
 
      1.  The Purchaser wishes to purchase certain equipment from the Vendor, on
      the terms and conditions hereinafter set forth.
 
      2.  The equipment to be purchased by the Purchaser from the Vendor is set
      out and described in Schedule "A" attached hereto and forming part hereof
      (the "Equipment").
 
      3.  Delivery of the equipment is to occur on or before August 1, 1997.
 
      NOW THEREFORE IN CONSIDERATION OF the mutual premises and covenants herein
contained, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:
 
      4.  The purchase price for the Equipment shall be the total of (A), (B)
      and (F) as set forth in the following statement:
 
                                   STATEMENT
 
<TABLE>
      <S>   <C>                                                                     <C>
      (A)   Regular cash selling price                                              $ [     ] *
      (B)   G.S.T. @ 7%                                                             $ [     ] *
      (C)   Regular Cash Selling Price plus G.S.T.                                  $ [     ] *
      (D)   Less: Cash Down Payment                                                 $ [     ] *
      (E)   Balance of Cash Price                                                   $ [     ] *
      (F)   Add: Credit (Finance) charges
            ANNUAL PERCENTAGE RATE -- 0.00%                                         $ [     ] *
      (G)   Time Balance                                                            $ [     ] *
      (H)   TOTAL PURCHASE PRICE [TOTAL OF (A), (B) AND (F)]                        $ [     ] *
</TABLE>
 
      5.  The Purchaser hereby promises and agrees to pay the said Total      *
      Purchase Price of $[          ] to the Vendor at Calgary, Alberta as
      follows:
 
        (a)  The sum of $[       ] shall be payable on the date of execution  *
             of this Agreement.
 
                                        1
<PAGE>   2
 
     The information below marked by  * and [     ] has been omitted pursuant to
a request for confidential treatment. The omitted portion has been separately
filed with the Commission.
 
        (b)  The sum of $[       ] on delivery of the Equipment together with  *
             interest on all overdue installments or so much thereof as may from
             time to time remain unpaid, and on any other amounts owing as
             described hereafter and remaining unpaid from time to time, at the
             rate of twelve (12) per centum per annum to be computed monthly not
             in advance from the date of default in payment thereof, both before
             and after judgment (hereinafter called the "Interest").
 
      6.  The Vendor shall mount the Equipment in a recording truck supplied by
      the Purchaser and prepared to the reasonable specifications of the Vendor.
      This installation shall take place at a mutually agreeable location.
 
      7.  The Vendor shall test the Equipment prior to delivery to ensure that
      the Equipment is performing to the Vendor's published specifications. The
      Purchaser's representatives may be present for and participate in this
      testing.
 
      8.  By accepting the Equipment, the Purchaser acknowledges and agrees that
      the Equipment has been prepared and is operating for its intended purpose
      and the Purchaser acknowledges that the Equipment is sold on an "as is"
      and "where is" basis, and that otherwise as expressly set out in this
      Agreement, Vendor makes no representations or warranties, express or
      implied (by statute or otherwise), as to the Equipment and assumes no
      responsibility for the condition or intended use of the same.
 
      9.  The Vendor shall provide the following warranty with regard to the
      Equipment from the date of delivery thereof,
 
        (a)  Twelve months parts and labour warranty on all Central Recording
             Unit components.
 
        (b)  Twenty four months parts and labour warranty on all Remote
             Acquisition Modules and Line Tap Units.
 
        (c)  The standard cable manufacturer's warranty on cables.
 
        (d)  No warranty is provided on batteries.
 
        (e)  This warranty does not apply to connectors or to units which have
             been subject to physical damage, misuse, unauthorized repair or
             modification or loss due to any reason.
 
        (f)  When warranty service is required at a remote location, the
             Purchaser shall reimburse the Vendor for travel and living expenses
             for the Vendor's technicians to travel from Calgary, Alberta to the
             location of the Equipment and return to Calgary, Alberta.
 
      10.  After the warranty period, the Vendor shall offer maintenance for the
      Equipment at the Vendor's then prevailing shop rates.
 
      11.  It shall be the Purchaser's responsibility to conduct such tests as
      are appropriate with sufficient frequency to ensure that the Equipment is
      functioning properly. The Vendor specifically does not accept and shall
      not be responsible for any direct or indirect liability or loss (including
      loss of profit, business, revenue, goodwill, or anticipated savings)
      resulting out of or in any way connected with the Purchaser's use of the
      Equipment, including without limitation any malfunction or non-operation
      of the Equipment or any of its component parts.
 
      12.  The Purchaser acknowledges and agrees that any and all trade marks,
      trade names, copyrights, patents and other intellectual property rights
      used or embodied in or in connection with the ARAM 24 Seismic Recording
      System shall be and remain the sole property of the Vendor. In the event
      that new inventions, designs or processes evolve in the performance of or
      as a result of the use of the ARAM 24 Seismic Recording System by the
      Purchaser, the Purchaser acknowledges and agrees that the same shall be
      the property of the Vendor unless otherwise agreed in writing by the
      Vendor.
 
                                        2
<PAGE>   3
 
      13.  The Purchaser further recognizes and accepts that the Equipment and
      information and know how relative thereto incorporates certain proprietary
      information (the "Proprietary Information"). The Purchaser undertakes to
      keep all such Proprietary Information confidential and not directly or
      indirectly, at any time or in any place, disclose to any others (excepting
      the Purchaser's officers or employees having a need to know or otherwise
      as permitted by this Agreement) or use in any way other than in connection
      with the proper use of the Equipment, and Proprietary Information. As part
      of its obligation under this Clause 13, the Purchaser shall counsel its
      employees and representatives regarding its and their obligations
      regarding the Proprietary Information.
 
      14.  The Purchaser shall not, without the prior written consent of the
      Vendor, copy or manufacture or permit to be copied any of the Equipment
      including, without limitation, those elements of the Equipment
      incorporating Proprietary Information.
 
      15.  The Purchaser shall not, without the prior written consent of the
      Vendor, show or permit to be shown any internal feature of the said
      Equipment and supplies or any drawings, schematics, diagrams, manuals or
      instructions or other documentation relative thereto to any other person;
      provided, however, that the foregoing prohibition shall not prevent the
      Purchaser showing any of the foregoing to any of the Purchaser's employees
      or others having a need to know for the purpose of the proper conduct of
      the Purchaser's business, subject to the Purchaser giving written
      instruction to such employees or others that the features and
      documentation are to be treated in a confidential manner in accordance
      with this Agreement.
 
      16.  The Purchaser shall enter into a Software License with the Vendor as
      per Schedule "B" attached hereto and forming a part hereof.
 
      17.  In the event of default by the Purchaser, the Purchaser shall
      reimburse all costs and expenses incurred by the Vendor, including but not
      limited to removing, holding, preparing for sale and selling the Equipment
      or any of it, judicial costs, legal costs and legal fees on a solicitor to
      his own client basis (hereinafter collectively called the "Costs"), and
      such Costs incurred and paid by the Vendor shall be immediately due and
      payable by the Purchaser to the Vendor with Interest as aforesaid.
 
      18.  It is agreed that until the said Total Purchase Price and applicable
      Costs and Interest are fully paid, title to and ownership in the Equipment
      shall remain with the Vendor and the Equipment shall remain the property
      of the Vendor, but the same shall be entirely at the Purchaser's risk.
 
      19.  During the term of this Agreement, and so long as title to and
      ownership of the Equipment remain with the Vendor, the Equipment shall
      only be used in British Columbia, Alberta and Saskatchewan or such other
      locations as the Vendor shall consent to in writing. The Purchaser shall
      promptly reimburse the Vendor for legal expenses to register this
      Agreement in any other jurisdiction in which the use of the Equipment is
      specifically granted by the Vendor.
 
      20.  The Purchaser agrees that in the event it makes default under this
      Agreement and in particular in any of the payments required to be made
      pursuant to this Agreement, the whole unpaid balance of the said Total
      Purchase Price and applicable Costs and Interest shall immediately become
      due and payable, and the Vendor or its agent, may enter upon any premises
      where the Equipment may be and take possession of the Equipment without
      any previous demand, using such force as may be required for that purpose
      and may re-sell the Equipment or any portion thereof, notwithstanding that
      a part of the Total Purchase Price may have been paid, or that security
      may have been given therefor and discounted by the Purchaser's bank or any
      other party. If possession of the Equipment or any portion thereof is
      taken by the Vendor, the Purchaser shall nevertheless upon a re-sale of
      the Equipment, conducted pursuant to applicable law, the net amount
      received from such re-sale by the Vendor, after deducting all Costs
      applicable to the resale, shall be credited against the Purchaser's
      obligations under this Agreement, and if the amount so credited exceeds
      the balance then due by the Purchaser upon the same the Purchaser shall be
      entitled to have such balance paid to it, but if such net amount received
      form the re-sale is less than the amount then owing by the Purchaser then
      the Purchaser shall remain liable for the amount still owing after such
      credit is given it and the Vendor may, at its sole discretion,
 
                                        3
<PAGE>   4
 
      bring action against the Purchaser for the full amount of the Total
      Purchase Price and applicable Costs and Interest remaining unpaid.
 
      21.  To give full effect to the last sentence in Clause 20 above, the
      Purchaser acknowledges it is a body corporate and the Equipment is not
      used or acquired for use primarily for personal, family or household
      purposes and the Purchaser hereby expressly waives all rights, protection
      and benefits afforded to it by Section 49 of the Law of Property Act
      (Alberta) or the Limitation of Civil Rights Act (Saskatchewan) or by any
      other section or legislation offering similar rights, protections or
      benefits in present or future statutes. The Vendor's rights and remedies
      herein are in addition to any given by law.
 
      22.  The Purchaser agrees to assume all risk of loss or damage to the
      Equipment from whatsoever cause arising and to properly care for the
      Equipment and keep all of it in good repair and not to remove the
      Equipment, or any of it, from British Columbia, Alberta and Saskatchewan
      without the prior written consent of the Vendor.
 
      23.  The Purchaser further agrees to keep the Equipment insured, more
      specifically:
 
        (a)  The Purchaser shall ensure that at all times the Equipment is
             insured against loss or damage by an "All Risks" Contractors
             Equipment Floater, including without limitation loss by fire
             (including extended coverage), theft, collision, sinking through
             ice and muskeg, and such other risks of loss as are customarily
             covered by insurance on the type of equipment sold hereunder by
             prudent operators of business similar to that in which Purchaser is
             engaged, in such amounts, in such form and with such insurers as
             shall be satisfactory to Vendor, but in no event shall such
             insurance be less than the full replacement value of the Equipment;
             and
 
        (b)  The Purchaser shall maintain during the term of this Agreement
             public liability and property damage insurance in respect of the
             use, operation and possession of the Equipment with insurers
             satisfactory to the Vendor in a minimum amount of $5,000,000 per
             occurrence; and
 
        (c)  The insurance referred to in paragraphs a) and b) above shall be
             arranged by Purchaser as a specific separate item of insurance such
             that it does not form part of Purchaser's overall "blanket limit"
             of coverage; and
 
        (d)  The insurance policy shall name Purchaser and Vendor as insureds,
             shall name Vendor as loss payee thereof and shall contain a clause
             requiring the insurer to give to Vendor at least 30 days' prior
             written notice of any alteration in terms of such policy or of the
             cancellation thereof. At Vendor's request, Purchaser shall furnish
             to Vendor a certificate or certificates of insurance or other
             evidence satisfactory to Vendor that such coverage is in effect,
             provided, however, that Vendor shall be under no duty to either
             ascertain the existence of or to examine such insurance policy or
             to advise Purchaser in the event such insurance coverage shall not
             comply with the requirements hereof. Purchaser shall, at its
             expense, make all proofs of loss and take all other steps necessary
             to recover insurance benefits unless advised in writing by Vendor
             that Vendor desires so to do at Purchaser's expense. The Purchaser
             and Vendor shall be noted on the Insurance Certificate as loss
             payees as their interest may appear; and
 
        (e)  Purchaser shall immediately notify Vendor of any loss or damage to
             any of the Equipment, or of any claim made against it relative to
             the Purchaser's use, operation or possession of the Equipment.
 
      24.  The Purchaser further agrees that the bringing of an action or the
      recovery of judgment by the Vendor against the Purchaser for the total
      Purchase Price and applicable Costs and Interest under this Agreement or
      any part thereof shall not vest in the Purchaser the title of the
      Equipment, but that such title shall, notwithstanding such action or
      judgment, be and remain in the Vendor until payment in full of its claim
      against the Purchaser herein and shall be subject to the Vendor's right to
      sell title to a third party on default.
 
                                        4
<PAGE>   5
 
      25.  The Purchaser grants to the Vendor a purchase money security interest
      in the Equipment, as security for the satisfaction of all of the
      Purchaser's obligation to the Vendor hereunder or under any other
      agreement made between the Purchaser and the Vendor.
 
      26.  The Purchaser may not assign the Purchaser's rights and obligations
      under this Agreement and may not lease, loan or otherwise dispose of the
      Equipment or any part thereof, unless the Vendor gives its prior written
      approval. The Vendor shall have the right to assign this Agreement and all
      its rights hereunder, at any time, to any individual, firm or corporation.
 
      27.  The Purchaser's obligations under clauses 12, 13, 14 and 15 of this
      Agreement shall remain in effect even after completion or termination of
      this Agreement.
 
      28.  Time shall in every respect be of the essence of this Agreement.
 
      29.  This Agreement shall enure to the benefit of and be binding upon the
      parties hereto, their respective heirs, executors, administrators,
      successors and assigns, and wherever the singular or masculine is used
      herein, the same shall include the plural or feminine whenever the context
      or circumstances so require.
 
      30.  The Purchaser shall keep the Equipment free of all liens, mortgages,
      encumbrances, charges and other security interests.
 
      31.  No previous waiver or course of dealing shall affect the Vendor's
      right to strict performance of other or future obligations of the
      Purchaser.
 
      32.  Any provision of this Agreement prohibited by law shall be effective
      to the extent of such prohibition without invalidating the remaining
      provisions of this Agreement and the Vendor shall be entitled to any other
      remedies available by law or statute.
 
      33.  This Agreement shall be governed by and construed in accordance with
      the laws of the Province of Alberta applicable therein.
 
      34.  Any notice or other document required or permitted by any of the
      provisions of the Agreement shall be given to the parties by written
      notice at the following addresses or to such other addresses as the
      parties may specify in writing:
 
      If to the Purchaser, at:
 
                            VENTURE SEISMIC LTD.
                            3110 - 80TH AVENUE S.E.
                            CALGARY, ALBERTA, CANADA
                            T2C 1J3
                            ATTENTION: BRIAN KOZUN, PRESIDENT & CEO
 
      If to the Vendor, at:
 
                            GEO-X SYSTEMS LTD.
                            900, 425 - 1ST STREET S.W.
                            CALGARY, ALBERTA, CANADA
                            T2P 3L8
                            ATTENTION: DON SIMPSON, PRESIDENT
 
      Notice shall be effective if given personally to a director or officer of
a party, if delivered to the addresses specified above during normal business
hours, or if mailed by prepaid registered mail to the addresses and persons
specified above. If notice is mailed by prepaid registered mail, it shall be
deemed to have been received five days after deposit in a post office in Canada.
If at the time of mailing or between the time of mailing and deemed receipt
thereof, there occurs a mail strike, a slow-down or other labour dispute which
may affect the delivery of notice by mail, the notice given by mail shall be
effective only if actually delivered.
 
                                        5
<PAGE>   6
 
      35.  All fees, levies, custom duties, taxes and charges of any nature
      whatsoever, including goods and services or other governmental charges and
      any additions or charges thereon, now and hereafter imposed by any
      federal, provincial, state or municipal government or taking authority,
      regulatory authority or political subdivision thereof or therein, relating
      to the sale, delivery, use, financing or disposition of the Equipment or
      the use of the Software or to any documents relating thereto, or relating
      to this Agreement or anything contained herein, shall be for the account
      of and be forthwith paid by the Purchaser as prescribed and if the
      Purchaser neglects to pay, as aforesaid, the Vendor may pay and any amount
      so paid by the Vendor shall be added to the Total Purchase Price and the
      Total Purchase Price, or so much thereof as may remain unpaid, shall
      become immediately due and payable by the Purchaser to the Vendor with
      Interest as aforesaid.
 
      36.  Except as caused solely by Vendor negligence, Purchaser shall
      indemnify Vendor for all losses, costs and liability (including but not
      limited to claims based on strict liability in tort or as may be contained
      in any legislation) which Vendor incurs in connection with the Equipment.
      All indemnities and liability limitations in favour of Vendor shall
      continue after the term of the Agreement and even if the Agreement is
      terminated for any reason.
 
      37.  Purchaser shall from time to time provide Vendor with any credit
      information relative to this Agreement which Vendor may reasonably
      request.
 
      38.  This Agreement is the entire agreement between Purchaser and Vendor
      with respect to the subject matter hereof and may be varied only by
      written documentation signed by both Purchaser and Vendor.
 
      39.  All Vendor's rights are cumulative and not alternative and may be
      exercised by Vendor separately or together in any order or combination.
 
      40.  Purchaser shall do all acts and execute all documents as Vendor may
      require to give effect to this Agreement and to preserve and protect
      Vendor's rights.
 
      41.  The Purchaser acknowledges receipt of a duplicate copy of this
      Agreement immediately on the execution thereof, and it waives any rights
      it may have with respect to receiving notification or copies of any
      registrations made at any public registries with respect thereto.
 
      42.  All dollar amounts and references to currency herein are in Canadian
      dollars.
 
      43.  This Agreement may be executed in counterparts.
 
DATED at the City of Calgary, in the Province of Alberta as of the date first
above written.
 
                                          Purchaser:
                                          VENTURE SEISMIC LTD.
 
                                          Per: /s/ Greg Wiebe               c/s
                                          -------------------------------------
                                               Chief Financial Officer
 
                                          Vendor:
                                          GEO-X SYSTEMS LTD.

                                          Per: /s/ D.W. Simpson             c/s
                                          -------------------------------------
                                               President
 
                                        6
<PAGE>   7
 
The information below marked by * and [  ] has been omitted pursuant to a
request for confidential treatment. The omitted portion has been separately
filed with the Commission.
 
                   SCHEDULE "A" TO CONDITIONAL SALE AGREEMENT
 
              BETWEEN GEO-X SYSTEMS LTD. AND VENTURE SEISMIC LTD.
 
The Equipment to be purchased by Venture Seismic Ltd. from Geo-X Systems Ltd.
and subject to the terms of this Agreement is as follows:
 
ARAM 24 Seismic Recording System components as listed below:
 
<TABLE>
<CAPTION>
-------------------------------------------------------------------
                      CENTRAL RECORDING UNIT                       QTY UNIT PRICE EXTENDED PRICE
------------------------------------------------------------------------------------------------
<S>                                                                <C> <C>        <C>
  INCLUDING:
------------------------------------------------------------------------------------------------
    Basic acquisition module with 3 Line Interface Cards
------------------------------------------------------------------------------------------------
    200 MHz P-6 PC controller -- 512 Kbytes of cache
------------------------------------------------------------------------------------------------
        -- Quad configurable w/single P6
------------------------------------------------------------------------------------------------
        -- 128 MB of ram memory
------------------------------------------------------------------------------------------------
        -- 9 Gbyte Hard drive
------------------------------------------------------------------------------------------------
        -- CD ROM
------------------------------------------------------------------------------------------------
    2 ea. Exabyte backup tape drives
------------------------------------------------------------------------------------------------
    17" Monitor, Keyboard & Roller Ball Mouse
------------------------------------------------------------------------------------------------
    Interfaces to system, tape, plotter
------------------------------------------------------------------------------------------------
    ARAM 24 Dynamite Recording System software license
------------------------------------------------------------------------------------------------
    ARAM 24 Power Supply & 19" System Rack                         1        [*]          [*]
------------------------------------------------------------------------------------------------
  CRU OPTIONS & UPGRADES
------------------------------------------------------------------------------------------------
    Additional Line Interface Cards                                0        [*]          [*]
------------------------------------------------------------------------------------------------
    Upgrade PC to 256 MB of ram memory                             0        [*]          [*]
------------------------------------------------------------------------------------------------
    Upgrade PC to 512 MB of ram memory                             0        [*]          [*]
------------------------------------------------------------------------------------------------
    Upgrade PC to 1024 MB of ram memory                            0        [*]          [*]
------------------------------------------------------------------------------------------------
    Upgrade PC to Dual P-6 CPU operation                                    [*]          [*]
------------------------------------------------------------------------------------------------
    Upgrade PC to Triple P-6 CPU operation                                  [*]          [*]
------------------------------------------------------------------------------------------------
    Upgrade PC to Quad P-6 CPU operation                                    [*]          [*]
------------------------------------------------------------------------------------------------
    Vibroseis option                                               0        [*]          [*]
------------------------------------------------------------------------------------------------
  CRU PERIPHERALS
------------------------------------------------------------------------------------------------
    Uninterrupted power supply                                     1        [*]          [*]
------------------------------------------------------------------------------------------------
    Fujitsu 3480 tape drive                                        1        [*]          [*]
------------------------------------------------------------------------------------------------
    Thermal plotter -- OYO 612                                     1        [*]          [*]
------------------------------------------------------------------------------------------------
    Phillips 4 Channel Oscilloscope                                1        [*]          [*]
------------------------------------------------------------------------------------------------
    Sub-total for Central Recording Unit Equipment                                       [*]
------------------------------------------------------------------------------------------------
  LINE EQUIPMENT
------------------------------------------------------------------------------------------------
    RAM MK-II, 8 channels each                                     45       [*]          [*]
------------------------------------------------------------------------------------------------
    Field Replaceable connectors (per RAM)                         45       [*]          [*]
------------------------------------------------------------------------------------------------
    Line Tap Units (LTUs)                                          0        [*]          [*]
------------------------------------------------------------------------------------------------
    Field Replaceable connectors (per LTU)                         0        [*]          [*]
------------------------------------------------------------------------------------------------
    Microwave repeater unit -- per pair                            0        [*]          [*]
------------------------------------------------------------------------------------------------
    Battery packs -- 12 amp hour                                   90       [*]          [*]
------------------------------------------------------------------------------------------------
    Solar Battery pack                                             0        [*]          [*]
------------------------------------------------------------------------------------------------
    Battery Chargers -- charge 10 packs simultaneously             3        [*]          [*]
------------------------------------------------------------------------------------------------
  CABLES -- CABLES -- CABLES, 220 METER, 12.8 KG.
------------------------------------------------------------------------------------------------
    ARAM 24 6 Pair 2DL cable                                       55       [*]          [*]
------------------------------------------------------------------------------------------------
    2D Inline Jumper Cable 22 meter -- Takeouts (8)                2        [*]          [*]
------------------------------------------------------------------------------------------------
    Sub-total for Line Equipment                                                         [*]
------------------------------------------------------------------------------------------------
  TEST EQUIPMENT
------------------------------------------------------------------------------------------------
    RAM test/maintenance station                                            [*]          [*]
------------------------------------------------------------------------------------------------
    Truck simulator / stand alone line tester                               [*]          [*]
------------------------------------------------------------------------------------------------
    Cable tester                                                   0        [*]          [*]
------------------------------------------------------------------------------------------------
    Hand held test unit with meter                                 2        [*]          [*]
------------------------------------------------------------------------------------------------
    Power Head with 9 volt battery                                 4        [*]          [*]
------------------------------------------------------------------------------------------------
    Sub-total for Test Equipment                                                         [*]
------------------------------------------------------------------------------------------------
                                                                                  --------------
  SUB-TOTAL                                                                              [*]
------------------------------------------------------------------------------------------------
  DISCOUNT                                                                               [*]
------------------------------------------------------------------------------------------------
                                                                                  --------------
  TOTAL                                                                                  [*]
------------------------------------------------------------------------------------------------
                                                                                  --------------
</TABLE>
 
 All dollar amounts and references to currency herein are in Canadian dollars.
 
                                        7
<PAGE>   8
 
                   SCHEDULE "B" TO CONDITIONAL SALE AGREEMENT
 
              BETWEEN GEO-X SYSTEMS LTD. AND VENTURE SEISMIC LTD.
 
                                SOFTWARE LICENSE
 
   GRANT OF LICENSE TO VENTURE SEISMIC LTD. ("VENTURE") BY GEO-X SYSTEMS LTD.
                                   ("GEO-X")
 
                             GEO-X SOFTWARE PRODUCT
 
This software product is the object code of all software used in or with the
ARAM 24 Seismic Recording System Package, including all amendments, supplements,
modifications, enhancements and new versions thereof (collectively, the
"Software").
 
The documentation (the "Documentation") includes all instructional information,
user manuals and other materials, together with all amendments, supplements,
modifications and new versions thereof, which relate to or are used in
association with the Software and/or the ARAM 24 Seismic Recording System
Package. The Software and Documentation are herein collectively referred to as
the "Products".
 
                             GEO-X SOFTWARE LICENSE
 
1. GRANT OF LICENSE.  In consideration of Venture's purchase of an ARAM 24
Seismic Recording System and entering into a Conditional Sale Agreement with
Geo-X Systems Ltd. dated June 19th, 1997 (the "Conditional Sale Agreement"),
Geo-X, as licensor, grants to Venture, as licensee, a non-exclusive,
nontransferable, and limited right use of the Products.
 
2. REVISIONS AND UPGRADES.  During the first year following delivery of
Venture's ARAM 24 Seismic Recording System, and providing that Venture has
accepted the Equipment contained in the Conditional Sale Agreement, Geo-X will
provide to Venture any new released versions of the Software and Documentation
pertaining thereto which Geo-X develops. Following that time, Geo-X will offer
subsequent upgrades of the Software and Documentation pertaining thereto at
Geo-X's then prevailing upgrade fees. The terms of this agreement shall apply to
all upgraded or revised versions of the Software and Documentation pertaining
thereto.
 
3. OWNERSHIP OF SOFTWARE.  As licensee, Venture owns the physical media on which
the Products are originally or subsequently recorded (subject to any retention
of title contained in the Conditional Sale Agreement), but Geo-X retains title
and ownership of the Software recorded on the original media and all subsequent
copies of the Software, regardless of the form or media in or on which the
original and other copies exist.
 
4. COPY RESTRICTIONS.  The Products are copyrighted by Geo-X. Unauthorized
copying of the Products is expressly forbidden. If the Equipment is accepted and
the sale completed, the Software may be copied by Venture for backup purposes so
long as it is used solely for Venture's ARAM 24 Seismic Recording System, which
is the subject of the Conditional Sale Agreement.
 
5. USE RESTRICTIONS.  Venture may use the Software on up to three computers
provided that its use is solely for the preparation and analysis of data to be
acquired or having been acquired with Venture's ARAM 24 Seismic Recording
System, which is the subject of the Conditional Sale Agreement.
 
6. TRANSFER RESTRICTIONS.  The Products are licensed only by Venture, the
licensee, and may not be transferred to any other individual or company without
the prior written consent of Geo-X. In no event may Venture transfer, assign,
rent, lease, sell, or otherwise dispose of the Products on a temporary or
permanent basis without such written consent.
 
7. CONFIDENTIAL INFORMATION.  All information, data, drawings, specifications,
documentation, software listings, source or object codes which Geo-X may have
imparted and may from time to time impart
 
                                        8
<PAGE>   9
 
to Venture relating to the Products, is proprietary and confidential. Venture
hereby agrees that it shall use the same solely in accordance with the
provisions of this License and that it shall not at any time during or after
expiry or termination of this License, disclose the same, whether directly or
indirectly, to any third party without Geo-X's prior written consent. Venture
further agrees that it shall not itself or through any subsidiary, agent or
third party modify, vary, enhance, copy, sell, lease, license, sub-license or
otherwise deal with the Products or any part or parts or variations,
modifications, copies, releases, versions or enhancements thereof or have any
software or other program written or developed for itself based on any
confidential information supplied to it by Geo-X.
 
8. TERMINATION.  This License shall be effective until terminated. This License
shall terminate automatically without notice from Geo-X if:
 
     (a)  Venture fails to comply with or is in breach of any term, condition or
        provision of this License or the Conditional Sale Agreement; or
 
     (b)  Venture is declared or adjudged bankrupt or if a receiver or
        receiver-manager or liquidator is appointed over any of its assets or
        undertaking.
 
Upon termination Venture shall destroy all copies of the Software, including
modified copies, if any. This License will terminate automatically after 10
years following the date of delivery of the Software or any upgrades or
revisions to the Software. After such 10 year period, Venture may use the
Software without restriction.
 
9. LIMITED WARRANTY.  The Products are provided "as is" without warranty of any
kind. Further, Geo-X does not warrant, guarantee, or make any representations
regarding the use, or the result of use, of the Products in terms of
correctness, accuracy, reliability, currentness, or otherwise. The entire risk
as to the results and performance of the Products or any consequences resulting
form any use of the Products is assumed entirely by Venture. Geo-X warrants that
the media on which the Software is recorded is free from defects in materials
and workmanship under normal use and service for a period of fifteen months from
the date of Venture's receipt of the media. The foregoing is the only warranty
of any kind, either express or implied (by statute or otherwise). No oral or
written information or advice given by Geo-X or its representatives shall create
a warranty or in any way increase the scope of this warranty.
 
10. LIMITATION OF LIABILITY.  Geo-X's entire liability and Venture's exclusive
remedy as to the media shall be replacement of the media that does not meet
Geo-X's Limited Warranty as set out above, and which is returned to Geo-X with a
copy of the receipt. If failure of the media has resulted from accident, abuse,
or misapplication, Geo-X shall have no responsibility or obligation to replace
the media. Any replacement media shall be warranted for the remainder of the
original warranty period only. Neither Geo-X nor any of its representatives or
anyone else who has been involved in the creation, production, sale, or delivery
of this product shall be liable for any damages, including but not limited to,
direct, indirect, consequential, special, exemplary, or incidental damages
(including damages for the loss of business profits, business interruption, loss
of data or information, and the like) arising out of the use of, inability to
use, or performance of such product, even if Geo-X has been advised of the
possibility of such damages.
 
11. INTELLECTUAL PROPERTY RIGHTS.  Venture acknowledges that nay and all of the
trade marks, trade names, copyrights, patents and other intellectual property
rights used or embodied in or in connection with the Products shall be and
remain the sole property of Geo-X. Venture shall not during or at any time after
the expiry or termination of this License in any way question or dispute the
ownership by Geo-X of any such rights. In the event that new inventions, designs
or processes evolve in performance of or as a result of this License, Venture
acknowledges that the same shall be the property of Geo-X unless otherwise
agreed in writing by Geo-X, and Venture shall hold same in trust for Geo-X and
forthwith upon the request of Geo-X assign the same to Geo-X.
 
12. WAIVER.  Failure or neglect by Geo-X to enforce at any time any of the
provisions hereof shall not be construed nor shall be deemed to be a waiver of
Geo-X's rights hereunder nor in any way affect the validity of the whole or any
part of this License nor prejudice Geo-X's rights to take subsequent action.
 
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<PAGE>   10
 
13. HEADINGS.  The headings of the terms and conditions herein contained are
inserted for convenience of reference only and are not intended to be part of or
to affect the meaning or interpretation of any of the terms and conditions of
this License.
 
14. SEVERABILITY.  In the event that nay of these terms, conditions or
provisions shall be determined invalid, unlawful or unenforceable to any extent,
such term, condition or provision shall be severed form the remaining terms,
conditions and provisions which shall continue to be valid to the fullest extent
permitted by law.
 
15. GOVERNING LAW.  This License and its terms and conditions shall be governed
and interpreted in accordance with the laws of the Province of Alberta, Canada.
 
ACCEPTED AND AGREED this 20th day of June, 1997.
 
                                          VENTURE SEISMIC LTD.
 
                                          Per: /s/ Greg Wiebe                c/s
 
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