Document:

EXHIBIT 10.5

                          CONSENT TO SUBLEASE AGREEMENT
                                (THE "AGREEMENT")

This Agreement made as of JUNE 14, 2004.

Amongst:

                CONSOLIDATED PROPERTIES (520 - 5(TM) AVENUE) LTD.
                   (hereinafter referred to as the "Landlord")

                                                               OF THE FIRST PART
                                       and

                        PARADIGM GEOPHYSICAL CANADA LTD.

                    (hereinafter referred to as the "Tenant")

                                                              OF THE SECOND PART

                                       and

                             BRYCOL CONSULTING LTD.

                  (hereinafter referred to as the "Subtenant")

                                                               OF THE THIRD PART

RECITALS

A.    By lease dated June 30, 2003 (the "Lease") between Consolidated Properties
      (520 - 5th Avenue)  Ltd.  ("Consolidated")  and the  Tenant,  Consolidated
      leased to the Tenant the  premises  (the "25th Floor  Premises")  known as
      Suite 2500 with an  approximately  area of 8,076 located on the 25th floor
      of the  building  located at 520 - 5th Avenue SW,  Calgary,  Alberta  (the
      "Building") more particularly described in the Lease.

B.    By offer to sublease  (the  "Sublease")  accepted  May 13, 2004 the Tenant
      agreed to sublease the 25th Floor  Premises to the  Subtenant on the terms
      and conditions more particularly described herein.

E.    The Tenant has requested that the Landlord consent to the Sublease, a copy
      of which is attached hereto as Schedule "A".

<PAGE>

THEREFORE THIS AGREEMENT  witnesses that in  consideration of the consent of the
Landlord to the  Sublease  and the mutual  covenants  and  agreements  contained
below, the parties hereto agree as follows:

1.    Interpretation

      The capitalized  terms used herein and not otherwise  defined herein shall
      have the meanings given thereto in the Lease.

2.    Subtenant Bound By Lease

      The Subtenant  agrees to be bound by and perform all terms and  conditions
      of the Lease  except for those  obligations  as to Rent and the Term.  The
      Tenant and the Subtenant agree, on a joint and several basis, to indemnify
      and save harmless the Landlord against any and all actions suffered by the
      landlord  and  arising  from  a  breach  by  the  Subtenant  of any of its
      obligations  under this  agreement or the  Sublease or resulting  from the
      occupancy of the premises under the Sublease by the Subtenant.  The Tenant
      agrees any default by the Subtenant  under this Agreement  shall be deemed
      to be a default under the Lease.

3.    Conditions to Agreement

      The  Landlord  hereby  consents to the  Sublease  subject to the terms and
      conditions of this Agreement. The Tenant and the Subtenant acknowledge and
      agree that this Agreement is expressly conditional upon:

      a.    the Tenant performing its obligations under the Lease; and

      b.    the Subtenant  performing its obligations  under the Sublease to the
            extent  that a  breach  of any  such  obligation  would  be,  if not
            performed, a breach under the Lease.

      These  conditions are for the sole benefit of the Landlord and if breached
      will  entitle  the  Landlord,,  at its  option,  to waive  such  breach or
      terminate  this  Agreement upon written notice to the Subtenant and Tenant
      without  limiting any other remedies of the landlord under this Agreement,
      the Lease or at law or equity.

4.    No Release

      This Agreement  shall in no way release the Tenant or any person or entity
      claiming by, through or under the Tenant,  including the  Subtenant,  from
      any of its covenants,  agreements,  liabilities and duties under the Lease
      (including,  without limitation, all duties to cause and keep Landlord and
      others  named or referred to in the Lease  fully  insured and  indemnified
      with respect to any acts or omissions

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<PAGE>

      of the  Subtenant or its agents,  employees  or invitees or other  matters
      arising by reason of the Sublease or the  Subtenant's use occupancy of the
      Premises),  as the same may be amended from time to time,  without respect
      to any provision to the contrary in the Sublease.

5.    Specific Provisions of Lease and Sublease

      This  Agreement  does not  constitute  approval  by Landlord of any of the
      provisions of the Sublease nor shall this  Agreement be construed to amend
      the  Lease  in any  respect.  Any  purported  modifications  of the  Lease
      contained in the Sublease shall be solely for the purpose of setting forth
      the rights and  obligations  as between the Tenant and the  Subtenant  and
      shall not be binding on the Landlord.

6.    Amendment of Sublease

      The Tenant and the  Subtenant  shall not amend the Sublease in any respect
      without the prior written  approval of the Landlord,  such approval not to
      be unreasonably  withheld.  In no event shall any such amendment affect or
      modify or be deemed to affect or modify the Lease in any  respect.  If the
      Sublease  is an  agreement  to sublease  and the tenant and the  Subtenant
      subsequently  enter  into a  sublease,  the Tenant  shall  provide a fully
      executed  true copy of the sublease to the Landlord and the  provisions of
      this Agreement shall be deemed to apply to such sublease.

7.    Limited Agreement

      This  Agreement  does not and shall not be  construed  or  implied to be a
      consent to any other matter for which the  Landlord's  consent is required
      under the Lease,  including,  without  limitation,  any alterations to the
      Premises,  any  additional  sublease of the Premises or part thereof,  any
      assignment  or  transfer  of the  Lease  or any  interest  therein  or any
      transfer or assignment of this Sublease.

8.    The Tenant's Continuing Liability

      The  Tenant  shall be liable to the  Landlord  for any  default  under the
      Lease,  whether such  default is caused by the Tenant or the  Subtenant or
      anyone claiming by or through either the Tenant or the Subtenant,  but the
      foregoing  shall not be deemed to restrict or diminish any right which the
      Landlord may have against the Subtenant  pursuant to the Lease,  in law or
      in equity for  violation  of the Lease or  otherwise,  including,  without
      limitation, the right to enjoin or otherwise restrain any violation of the
      Lease by the Subtenant.

9.    Acceptance by the Tenant and the Subtenant

      The Tenant and the Subtenant  understand and acknowledge that the Landlord
      has agreed to execute this Agreement based upon the Tenant's and the

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<PAGE>

      Subtenant's  acknowledgement  and  acceptance of the terms and  conditions
      hereof.

10.   Insurance

      Effective  the  earlier  of  the  commencement  date  of the  Sublease  or
      occupancy  by the  Subtenant  of the  subleased  premises,  in addition to
      complying  with the  requirements  of the Lease as to  insurance as if the
      Subtenant  were the Tenant  thereunder,  the  Subtenant  agrees to provide
      evidence of such insurance prior to taking possession of the Premises. The
      Subtenant  confirms  that the  insurance  it is  required to place for the
      Premises  under this  Agreement  and the  Sublease is being placed for the
      benefit of the Landlord and the Tenant.  The  Subtenant  confirms that its
      insurance is primary in  relationship  to the  Landlord's and the Tenant's
      insurance. The Tenant confirms its insurance is primary in relationship to
      the Landlord's insurance.

11.   Subordination

      The Sublease is, in all respects, subject and subordinate to the Lease, as
      the same may be amended.  Furthermore, in the case of any conflict between
      the  provisions of this  Agreement or the Lease and the  provisions of the
      Sublease,  the provisions of this agreement or the Lease,  as the case may
      be, shall prevail unaffected by the Sublease.

12.   Additional Rent

      Notwithstanding  anything to the contrary herein, the Tenant  acknowledges
      and agrees that the Tenant will  promptly pay to the  Landlord  throughout
      the Term of the Lease any Additional Rent owed to the Landlord as required
      under the Lease,  and  otherwise  comply with the  provisions of the Lease
      which may be relevant to the Sublease.  Without limiting the generality of
      the foregoing, the Tenant specifically agrees to pay all of the Landlord's
      costs, charges and expenses,  including reasonable lawyer's fees, incurred
      in  connection  with the Sublease and this  Agreement  upon  submission of
      bills therefore, and that the failure to pay the same upon demand shall be
      a default under the Lease.

13.   Termination of Lease and Attornment

      If at any time prior to the  expiration  of the term of the  Sublease  the
      Lease shall  terminate  or be  terminated  for any reason (or the Tenant's
      right to possession shall terminate without termination of the Lease), the
      Sublease and all parking rights thereunder shall simultaneously terminate.
      However,  the Subtenant agrees, at the election and upon written demand of
      the Landlord, and not otherwise,  that it shall be deemed to have attorned
      to the  Landlord  and  entered  in a new lease (the "New  Lease")  for the
      remainder of the term of the Sublease (the  "Remainder  Term") and the New
      Lease and such attornment shall be upon

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<PAGE>

      all of the same terms and  conditions  of the Lease except  that:  (i) the
      term of the New Lease shall be the Remainder Term; (ii) the premises shall
      be the premises described in the Sublease;  and (iii) the basic rent under
      the New Lease shall be the greater of the Net Rent payable under the Lease
      or the then current market rent for similar  improved  premises in similar
      buildings in similar locations (without  reference to subleased  premises)
      as determined  by the Landlord  objectively  and on written  notice to the
      Subtenant.   The  foregoing  provisions  of  this  paragraph  shall  apply
      notwithstanding  that,  as a matter of law,  the  Sublease  may  otherwise
      terminate  upon the  termination of the Lease,  and no further  instrument
      shall be required to give effect to such  provisions.  The New Lease shall
      be effective on the date the Lease is terminated  and the Subtenant  shall
      be liable to make all  readjustments  necessary  to give effect to the New
      Lease within 5 days of written  notice from the Landlord.  Upon the demand
      of the Landlord,  however,  the Subtenant agrees to execute,  from time to
      time,  documents  in  confirmation  of the  foregoing  provisions  of this
      paragraph  satisfactory  to the  landlord  in which  the  Subtenant  shall
      acknowledge  such  attornment and shall set forth the terms and conditions
      of its tenancy.  Nothing contained in this paragraph shall be construed to
      impair or modify any right otherwise exercisable by the Landlord,  whether
      under the Lease, or under any other agreement or in law.

14.   Services

      the Tenant  hereby  agrees that the  Landlord  may furnish to the Premises
      services  required by the Subtenant  other than or in addition to those to
      be provided  under the Lease,  and bill the  Subtenant  directly  for such
      services for the  convenience  of, and without notice to, the Tenant.  The
      Subtenant  hereby  agrees to pay the Landlord all amounts which may become
      due for such services on the due dates  therefore.  If the Subtenant shall
      fail to do so,  however,  the  Tenant  agrees to pay such  amounts  to the
      Landlord upon demand as Additional  Rent under the Lease,  and the failure
      to pay the same upon demand shall be a payment default under the Lease.

15.   Waiver and Privity

      Nothing herein contained shall be deemed a waiver of any of the Landlord's
      rights under the Lease.  Except as expressly  provided in this  Agreement,
      the  Landlord  shall not be deemed to have  privity of  contract  with the
      Subtenant or owe any  obligation or duty to the Subtenant  under the Lease
      or otherwise  until such time as the Landlord  exercises  its option under
      paragraph 13 hereof.  Any duties of the Landlord  under the Lease shall be
      solely in favour of, for the benefit of and enforceable by the Tenant.

16.   Notices

      The  Subtenant  agrees to promptly  deliver a copy to the  Landlord of all
      notices  of default  and all other  notices  sent to the Tenant  under the
      Sublease, and the

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<PAGE>

      Tenant  agrees  to  promptly  deliver a copy to the  Landlord  of all such
      notices sent to the Subtenant  under the Sublease.  The Landlord agrees to
      promptly deliver a copy to the Subtenant of all notices of default sent to
      the Tenant.  All copies of any such notices shall be delivered  personally
      or sent by registered or certified mail,  postage prepaid,  return receipt
      requested or by facsimile transmission to the parties as follows:

      if to the Landlord, at the Landlord's address in the Lease;

      if to the Tenant,

      Suite  600,  520 - 5th  Avenue  SW  Calgary,  Alberta  T2P 3R7  Facsimile:
      403-750-3536

      if to the Subtenant,

      Suite 2500, 520 - 5th Avenue SW
      Calgary, Alberta T2P 3R7
      Attention: Paul Hookman
      Facsimile: 403-234-0301

      or such  other  address  specified  in  writing  by any party to the other
      parties from time to time.

17.   More Than One Entity

      If  either  the  Tenant or the  Subtenant  is  comprised  of more than one
      person, the covenants of each of such persons comprising the Tenant or the
      Subtenant  as the case may be shall be deemed  joint and  several  and not
      several.   In  this  Agreement,   "person"  means  and  includes  (without
      limitation)  any  individual,  partnership,  firm,  company,  corporation,
      incorporated or  unincorporated  association,  co-tenancy,  joint venture,
      syndicate,  trust, government,  governmental or quasi-governmental agency,
      board,  commission or authority,  organization or any other form of entity
      howsoever   designated  or  constituted  or  any  group,   combination  or
      aggregation of any of them.

18.   The Tenant and the Subtenant Bound

      By executing this Agreement,  the Tenant and the Subtenant acknowledge and
      agree to be bound by all of the terms  and  conditions  of the  Landlord's
      consent to the Sublease as set forth herein.

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<PAGE>

19.   Amendments

      This  Agreement  may be  altered or  amended  only by a written  agreement
      signed by all parties to this Agreement.

20.   Governing Laws

      This  Agreement  shall be  governed  by the  laws of  Alberta  and  Canada
      applicable therein.

21.   Successors and Assigns

      This  Agreement  will enure to the benefit and be binding upon the parties
      to this Agreement and their respective successors and assigns.

22.   Counterpart Execution

      This  Agreement  may be executed in any number of  counterparts,  with the
      same effect as if all the parties had signed the same document and will be
      come  effective  once a signed  counterpart  is  delivered  by each of the
      parties to the other.  This Agreement shall be deemed to be executed under
      seal by all parties even if a party fails to apply its seal.

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Execution by Fax

This  Agreement  may be  executed  by a  party  and  delivered  by fax and if so
executed and transmitted,  this Agreement will be for all purposes  effective as
if the parties had delivered and executed the original Agreement.

IN WITNESS WHEREOF the Landlord, the Tenant and the Subtenant have duly executed
this Agreement as of the date and year first written above.

                                           CONSOLIDATED PROPERTIES
                                           (520 - 5TH AVENUE) LTD.

                                           Per: /s/ V. Boure
                                              ----------------------------------
                                              Name: V. Boure
                                              Authorized Signatory

                                           Per:_________________________________
                                               Name:
                                               Authorized Signatory

                                           PARADIGM GEOPHYSICAL CANADA LTD.

                                           Per: /s/ M Rayner
                                              ----------------------------------
                                              Name: M. Rayner
                                              Authorized Signatory

                                           Per:_________________________________
                                               Name:
                                               Authorized Signatory

                                           BRYCOL CONSULTING LTD.

                                           Per: /s/ Paul James Hookham
                                              ----------------------------------
                                              Name: Paul James Hookham
                                              Authorized Signatory

                                           Per:_________________________________
                                               Name:
                                               Authorized Signatory

                                       8
<PAGE>

                                   SCHEDULE"A"
                           COPY OF SUBLEASE ATTACHED)

<PAGE>

May 13, 2004

Paradigm Geophysical Canada Ltd.
c/o CMN Calgary Inc.
1000 Royal Bank Building
335-8th Avenue S.W.
Calgary, AB T2P 1C9

Dear Sirs:

This  Offer to  Sublease  ("Offer")  formally  expresses  the  intent  of Brycol
Consulting Ltd. to sublease from Paradigm  Geophysical Canada Ltd. those certain
premises on the 25* floor of 520 - 5"1 Avenue  S.W.  (the  "Building")  upon the
following terms and conditions:

1. SUBTENANT:     Brycol Consulting Ltd.

2. SUBLANDLORD:   Paradigm Geophysical Canada Ltd.

3. SUBPREMISES:   The subleased premises shall comprise of the 25th floor of the
                  Building as outlined in Schedule "A" attached  hereto having a
                  rentable area (the  "Rentable  Area") of  approximately  Eight
                  Thousand Seventy Six (8,076) square feet (the  "Subpremises").
                  The Rentable  Area of the  Subpremises  shall be determined in
                  accordance with the Landlord's  current  building  measurement
                  standards.

4. CONDITION OF
   SUBPREMISE:    The  Subpremises  shall be accepted and leased by Subtenant on
                  an  "as-is"  basis  with  respect  to all  existing  leasehold
                  improvements  contained  therein.  The Subtenant agrees not to
                  make,  erect,  install or alter any leasehold  improvements in
                  the  Subpremises  without  having  obtained the prior  written
                  approval  of  the   Sublandlord,   (not  to  be   unreasonably
                  withheld),  and the Landlord's approval in accordance with the
                  provisions  of the  Lease.  The  Subtenant's  request  for any
                  approval  hereunder  shall be in writing and accompanied by an
                  adequate  description  of  the  contemplated  work  and  where
                  appropriate, working drawings and specifications thereto.

5. TERM
   OF SUBLEASE:   The term of the Sublease  shall  commence on July 1, 2004 (the
                  "Commencement  Date")  and  expire on  October  30,  2008 (the
                  "Term").

6. BASIC RENT:    The Subtenant  shall pay Fifteen  Dollars Fifty Cents ($15.50)
                  per  rentable  square  foot to the  Sublandlord  as Basic Rent
                  ("Basic Rent") for the  Subpremises in respect of each year of
                  the Term.

7. ADDITIONAL
   RENT:          Throughout   the  Term,   the  Subtenant   shall  pay  to  the
                  Sublandlord its pro-rata share of operating expenses and taxes
                  (the  estimated for 2004 is $10.44 per rentable  square foot),
                  and all other  amounts  of  additional  rent (the  "Additional
                  Rent")  pertaining to the  Subpremises in accordance  with the
                  provisions of the Lease.

                  In  addition to the  foregoing,  the  Subtenant  shall also be
                  responsible  to pay business  taxes  pertaining to its use and
                  occupation of the Subpremises.

8. DEPOSIT:       Upon the  unconditional  acceptance of this Offer to Sublease,
                  the  Subtenant  shall provide an  additional  deposit,  in the
                  amount  of  Thirty  Five  Thousand  ($35,000)  payable  to CMN
                  Calgary  Inc.,  in  trust,  to be held  without  interest  and
                  applied to Basic Rent, Additional Rent and GST falling due for
                  the first one (1) month and the balance to be applied  against
                  the last one (1) month of the Term.

<PAGE>

9. SUB-SUBLETTING
   AND ASSIGNMENT:The Subtenant shall not be permitted to assign the Sublease or
                  to sub-sublease the Subpremises or any portion thereof without
                  the   Sublandlord's   prior   written   approval   not  to  be
                  unreasonably   withheld  and  the  Landlord's   prior  written
                  approval  subject to the  provisions  of the  Lease.  Any such
                  sub-subletting  or assignment  shall not relieve the Subtenant
                  of its covenants and obligations under this Sublease.

10.SUBLANDLORD'S
   CONDITIONS:    This Offer is subject to the following conditions:

                  a) Review and  approval by the  Sublandlord  of the  financial
                  status  of the  Subtenant  within  five (5)  business  days of
                  mutual  acceptance  of this  Offer.  The  Subtenant  agrees to
                  provide the Sublandlord,  within two (2) business days of such
                  request  with  credit  references  and  such  other  financial
                  information  relating to Subtenant as Sublandlord  may request
                  and Subtenant consents to Sublandlord making such inquiries as
                  Sublandlord deems necessary, and

                  b) the  Sublandlord  obtaining the  Landlord's  consent to the
                  proposed Sublease on in accordance with the Headlease; and

                  c) Sublandlord  Executive approval of this approval within TWO
                  (2) BUSINESS DAYS.

                  These  Conditions are for the benefit of the  Sublandlord  and
                  must be waived  in  writing  by the  Sublandlord.  If  written
                  notification of the satisfaction or waiver of these conditions
                  precedent is not provided by the  Sublandlord to the Subtenant
                  within the  aforesaid  time,  this Offer to Sublease  shall be
                  null and void and of no further force and effect.

11.SUBTENANT'S
   CONDITIONS:    This Offer is subject to the following conditions:

                  a)  Subtenant's  review and  acceptance  of the  Sublandlord's
                  Standard Form of Lease within five (5) business days of mutual
                  agreement to the business terms of this Offer.

                  This Condition is for the benefit of the Subtenant and must be
                  waived in writing by the Subtenant. If written notification of
                  the satisfaction or waiver of this condition  precedent is not
                  provided  by the  Subtenant  to  the  Sublandlord  within  the
                  aforesaid  time, this Offer to Sublease shall be null and void
                  and of no further force and effect.

12.FORMAL
   DOCUMENTATION: Within seven (7) business  days  following  the  unconditional
                  acceptance of this Offer,  the  Sublandlord  agrees to prepare
                  and  deliver  to  the  Subtenant  a  sublease  agreement  (the
                  "Sublease"),  which shall  incorporate  the provisions of this
                  Offer and the underlying  provisions of the Lease,  except for
                  the  amount  of Basic  Rent,  rights  of  renewal,  rights  of
                  expansion,  rights of first refusal, rights of termination and
                  such other similar  rights.  The  Subtenant  shall execute and
                  return the  Sublease to  Sublandlord  within five (5) business
                  days  from  the date of  receipt,  and in any  event  prior to
                  obtaining  possession of the  Subpremises.  It is acknowledged
                  that the Landlord must approve the  Sublease,  to confirm that
                  the terms in the Sublease  conform to the terms in this Offer.
                  The  Sublease  will  contain  a  condition  to  allow  for the
                  obtaining of the Landlord's confirmation.

<PAGE>

13.FIXTURES:      AIR HANDLING  UNIT/RAISED FLOOR -The air handling unit and the
                  raised  floor  located in the  computer  room shall be for the
                  sole and exclusive use of the Subtenant. The daily maintenance
                  of the two fixtures  shall be the sole  responsibility  of the
                  Subtenant.  Provided  the  Subtenant  is in  occupancy  of the
                  Premises the air  handling  unit and raised floor shall be the
                  sole exclusive use of the  Subtenant.  If the Subtenant is not
                  in  occupancy  of the Premises  the  fixtures,  including  any
                  restoration, shall revert to the SublandloroVLandlord.

14.PARKING:       The  Sublandlord  shall  provide  three (3)  assigned  parking
                  stalls in the Building parking lot (at standard rates) for the
                  Subtenant's use during the Term. (Stalls 26, 46 and 47)

15.TRANSMISSION
   VIA FACSIMILE: All  parties  agree  that this  Letter may be  transmitted  by
                  facsimile device and that reproduction of signatures by way of
                  this   facsimile   device  will  be  treated  as  though  such
                  reproductions  were executed  originals and  communication  by
                  such means will be legal and binding.

16.BASIC FREE
   RENT:          The Subtenant  shall not be obliged to pay Basic Rent for July
                  2004and one half (1/2) of August 2004.

17.ACCEPTANCE:    This Counter  Offer to Sublease is open for  acceptance by the
                  Sublandlord on or before 4:00 p.m. May 20,2004 and if accepted
                  it is the intention of the  Sublandlord and the Subtenant that
                  subject only to the  conditions set out in Paragraph 11 and 12
                  herein, this accepted Offer constitutes a binding contract and
                  the provisions hereof are to be interpreted  accordingly,  and
                  if not  accepted  by  then,  will be null  and  void and of no
                  further effect.

Should you find these terms and  conditions  acceptable,  please  indicate  your
acceptance by executing below and returning to our attention.

Yours truly,

BRYCOL CONSULTING LTD.

Per: /s/ Paul Hookham
   --------------------------------
   Name: Paul Hookham

The terms and  conditions  of this Letter are hereby agreed to and accepted this
31st day of May 2004.

PARADIGM GEOPHYSICAL CANADA LTD.

Per:  /s/ M. Rayner
   --------------------------------
   M. Rayner
   Authorized Signature

<PAGE>

                                  SCHEDULE "A"
                                   FLOOR PLAN

      (Floor Plan Image)

<PAGE>

                                  SCHEDULE "A"
               Attached to and forming part of a Sublease between
           Brycol Consulting Ltd. and Paradigm Geophysical Canada Ltd.
                                   FLOOR PLAN

      (Floor Plan Image)EXHIBIT 10.6

                                    SUBLEASE
              THIS SUBLEASE dated as of the 24th day of June 2004.

BETWEEN:
                        PARADIGM GEOPHYSICAL CANADA LTD.
                 (hereinafter referred to as "the Sublandlord")

OF THE FIRST PART
                                     - and-

                             BRYCOL CONSULTING LTD.
                  (hereinafter referred to as the "Subtenant")

OF THE SECOND PART

WHEREAS by a Lease dated June 30, 2003 between  Consolidated  Properties  (520 -
5th Avenue)  Ltd. as landlord and  Paradigm  Geophysical  Canada Ltd. as tenant,
(hereinafter  referred to as the "Lease"),  Paradigm Geophysical Canada Ltd. did
lease from  Consolidated  Properties  (520 - 5th  Avenue)  Ltd.  certain  leased
premises in the building municipally  described as 520 - 5th Avenue SW, Calgary,
Alberta the ("Building") as more particularly  described in the Lease, a copy of
which is attached hereto as Schedule "B".

AND  WHEREAS  the  Sublandlord  and  Subtenant  have  agreed to enter  into this
Sublease on the terms and conditions hereinafter set forth;

NOW, THEREFORE,  WITNESSETH that in consideration of the rents,  covenants,  and
agreements  to be paid  and  observed  the  Subtenant  does  sublease  from  the
Sublandlord the Subleased Premises, on the terms and conditions  hereinafter set
forth (hereinafter referred to as the "Sublease").

1.    SUBLEASED PREMISES

      The premises to be subleased by the  Sublandlord  to the  Subtenant  shall
      consist of a  rentable  area (the  "Rental  Area") of eight  thousand  and
      seventy six (8,076)  square feet,  comprising of the  twenty-fifth  (25th)
      floor of the Building as outlined in red on the floor plan attached hereto
      as Schedule "A" (hereinafter referred to as the "Subleased Premises").

2.    TERM

      The term of this Sublease (hereinafter referred to as the "Term") shall be
      for a period of four (4) years and six (6)  months  less one (1) day.  The
      Term  shall  commence  on July 1,  2004  (hereinafter  referred  to as the
      "Commencement  Date") and shall expire on December  30, 2008  (hereinafter
      referred to as the "Expiry Date").

<PAGE>

3.    RENT

      Rent (hereinafter  referred to as "Basic Rent") for the Subleased Premises
      throughout the Term shall be equal to:
      Term:
      Annual Basic Rent
      Monthly Basic Rent

      Augl5,2004-Dec30,2008
      $125,178.00 ($15.50 /sq.ft.)
      $10,431.50

      Basic  Rent shall be payable in advance on the first day of each and every
      month of the Term in equal monthly  installments.  Partial  months will be
      based on a proportionate share. For further  clarification,  the Subtenant
      will not be obligated to pay Basic Rent for the month of July and (1/2) of
      August 2004 (the "Free Basic Rent Period"). All other terms and conditions
      of the Sublease will apply during the Free Basic Rent Period.

      In addition to the Basic Rent payable by the Subtenant to the Sublandlord,
      the  Subtenant  shall  also pay to the  Sublandlord  monthly,  in  advance
      one-twelfth  (1/12) of the annual  operating  costs and all other  charges
      under the Sublease  which are  referable  to and related to the  Subleased
      Premises, including without limitation, all items referred to in paragraph
      4 hereof.

4.    TAXES, OPERATING AND ADDITIONAL COSTS

      The  Subtenant  further  covenants  and  agrees to pay to the  Sublandlord
      during the Term, in addition to Basic Rent,  all costs incurred or payable
      by the Sublandlord  (excepting  Basic Rent) under the Lease as these costs
      relate to the  Subleased  Premises,  including  but not  limited to taxes,
      insurance,  operating  costs,  and utilities  (hereinafter  referred to as
      "Additional  Rent").

      Subtenant's  Additional Rent shall be based on the  proportion,  which the
      Rental  Area of the  Subleased  Premises  bears to the Rental  Area of the
      Leased  Premises.  Sublandlord  shall  provide to Subtenant  copies of the
      budgets,  invoices and statements of operating costs, taxes, insurance and
      utilities as and when such budgets,  invoices or  statements  are given to
      Sublandlord by Landlord under the Lease. Subtenant's Additional Rent shall
      be due and payable to the  Sublandlord at the times and in the manner that
      such costs are due and payable by the Sublandlord to the Landlord.

      In addition to the foregoing the Subtenant shall pay from the Commencement
      Date and thereafter,  all business taxes that may be assessed  against the
      Subtenant in  connection  with the  Subleased  Premises and the  Subtenant
      shall also pay from the  Commencement  Date and thereafter all other costs
      and other charges directly  pertaining to the Subleased Premises which are
      not included in monthly installments of operating costs or occupancy costs
      payable  by the  Sublandlord  under  the  Lease and the costs of all other
      services related to the use or possession of the Subleased Premises by the
      Subtenant.  For the purposes of this Sublease, Basic Rent, Additional Rent
      and any other amounts  payable by the Subtenant to the  Sublandlord may be
      referred to as Rent.

                                       2
<PAGE>

5.    USE

      The Subleased Premises shall only be used solely as office space, provided
      such purposes complies with the provisions of the Lease and all applicable
      laws, by-laws,  regulations or other governmental  ordinances from time to
      time in existence.

6.    SUBTENANT'S COVENANTS

      The Subtenant covenants and agrees with the Sublandlord as follows:

      (a)   it will pay to the  Sublandlord  without any  deduction,  set-off or
            abatement all amounts due pursuant to paragraphs 3 and 4 hereof;

      (b)   The  Subtenant  will  perform  all  of  the  terms,   covenants  and
            conditions  on  the  part  of the  Sublandlord  to be  observed  and
            performed  under the  provisions  of the Lease as they relate to the
            Subleased Premises ;

      (c)   the  Subtenant  shall not  commit or permit to be  committed  on the
            Subleased  Premises or in the  Building,  any act or omission  which
            shall  violate any term or condition of the Lease or this  Sublease.
            In the event of the  termination  of the  Sublandlord's  interest as
            tenant  under the Lease for any  reason,  then this  Sublease  shall
            terminate coincidentally therewith and, without any liability of the
            Sublandlord to the Subtenant,  except where such termination of this
            Sublease arises from or is a result of the non-performance or breach
            of the terms,  covenants  and  conditions of the  Sublandlord  under
            paragraph 7 hereof.

7.    SUBLANDLORD'S COVENANTS

      The  Sublandlord  does hereby  covenant  and agree with the  Subtenant  as
      follows:

      (a)   to pay the rent and other  amounts  payable  by it  pursuant  to the
            terms of the Lease ;

      (b)   to perform and observe the  covenants  on its part  contained in the
            Lease  with  respect  to the  Subleased  Premises  so  far  as  such
            covenants  are not  required  to be  performed  and  observed by the
            Subtenant under this Sublease;

      (c)   to grant to the Subtenant quiet enjoyment of the Subleased  Premises
            during the Term hereof; and

      (d)   at the request of the Subtenant,  to take such action at the cost of
            the  Subtenant  as may be  required  and allowed for in the Lease to
            ensure  that the  landlord  under the Lease acts  reasonably  in the
            exercise  of any rights it may have with  respect  to the  Subleased
            Premises.

                                       3
<PAGE>

8.    APPROVAL

      Upon execution by the Sublandlord,  and the consent of the Landlord,  this
      Sublease shall be binding upon the parties hereto.  If not consented to by
      the Landlord this Sublease shall be null and void without the necessity of
      any further  formality,  notice,  delay,  or recourse by any party hereto.
      Neither  the  preparation  of this or any other form of  Sublease  nor any
      negotiations entered into in connection with its submission constitutes or
      implies any  commitment by the  Sublandlord  unless this Sublease has been
      consented to in writing by the Landlord.

9.    SECURITY DEPOSIT

      The  Sublandlord  acknowledges  receipt  from the  Subtenant of a Security
      Deposit in the amount of thirty five thousand  dollars  ($35,000.00) to be
      applied to Basic Rent,  Additional  Rent and GST falling due for the first
      one (1) month and the balance to be applied against the last one (1) month
      of the Term.  If the  Subtenant  defaults  under this  Sublease,  then the
      Sublandlord may use all or part of the Security  Deposit then remaining to
      remedy the default.

10.   ASSIGNMENT OR SUBLETTING

      The  Subtenant  shall not have any right to assign this Sublease or sublet
      or transfer  the  Subleased  Premises  without  first  complying  with the
      provisions of the Lease  dealing with same,  and without the prior written
      consent of the Sublandlord and the Landlord. Any such permitted assignment
      or subletting  shall not release or relieve the Subtenant of its covenants
      and obligations under this Sublease.

11.   INSURANCE

      All insurance  required to be obtained by the Sublandlord  pursuant to the
      Lease in  respect  of the  Subleased  Premises  shall be  obtained  by the
      Subtenant at its sole cost and shall name the Sublandlord and the Landlord
      as additional named insureds.  The Subtenant shall provide the Sublandlord
      and  the  Landlord  with  copies  of  the  said  policy  of  insurance  or
      certificates  setting out the full  particulars  of such policy,  prior to
      taking  possession  of the  Subleased  Premises  and  from  time  to  time
      thereafter shall provide written notification of any changes thereto.

12.   CONDITION OF SUBLEASED PREMISES

      The  Subleased  Premises  shall be accepted  and leased by Subtenant on an
      "as-is" basis. The Subtenant agrees not to make,  erect,  install or alter
      any other leasehold  improvements in the Subleased Premises without having
      obtained the prior written  approval of the  Sublandlord and the Landlord.
      The  Subtenant   shall  comply  with  all  terms  and  conditions  of  the

                                       4
<PAGE>

      Sublandlord's and Landlord's approval and the applicable provisions of the
      Lease  dealing  with  same.  The  Subtenant  shall be  entitled  to vacant
      possession of the Subleased  Premises July 1, 2004 (assuming this Sublease
      Lease  Agreement has been signed by the Subtenant and the  Sublandlord) to
      carry out any approved  modifications  to the  Subleased  Premises and for
      move-in  purposes.  At all times prior to the  Commencement  Date that the
      Subtenant is in possession of the Subleased  Premises  whether carrying on
      business or not, it shall be bound by all the  provisions  of the Sublease
      and the Lease  except that the  Subtenant  shall not be  obligated  to pay
      Basic Rent and Additional Rent until the Commencement Date.

      Air handling  unit / Raised  floor - The air handling  unit and the raised
      floor  (the  Equipment  Fixtures")  located  in the  computer  room of the
      Subleased  Premises  shall  be  for  the  sole  and  exclusive  use of the
      Subtenant.  The daily  maintenance of the Equipment  Fixtures shall be the
      sole  responsibility  of  the  Subtenant.  Provided  the  Subtenant  is in
      occupancy of the Subleased  Premises the Equipment  Fixtures  shall be the
      sole exclusive use of the Subtenant.  If the Subtenant is not in occupancy
      of  the  Subleased  Premises,   the  Equipment  Fixtures,   including  and
      restoration, shall revert to the Sublandlord/Landlord.

13.   PARKING

      The  Sublandlord  agrees to provide for the use of the Subtenant three (3)
      parking  spaces in the garage  beneath  the  Building  for the Term of the
      Sublease in accordance with the terms of the Landlord's  standard  parking
      agreement. The cost for this space shall be at the prevailing parking rate
      charged  by the  Landlord  to the  Sublandlord  from  time  to  time.  The
      Subtenant  shall ensure that all payments  required for the parking  space
      are fully paid monthly in advance.

14.   NET SUBLEASE

      The  Subtenant  hereby  acknowledges,  confirms  and agrees that it is the
      intention of the Sublandlord  and the Subtenant that,  except as expressly
      set out herein,  this Sublease  shall be a completely net Sublease for the
      Sublandlord and that, subject to the provisions contained in the Sublease,
      the  Sublandlord  shall  not  be  responsible  during  the  Term  for  any
      obligations,  losses, charges, expenses, or outlays of any nature and kind
      whatsoever  arising from or relating to the Subtenant's use and occupation
      of the Subleased  Premises or the contents  thereof and that the Subtenant
      shall pay all charges,  impositions  and expenses of every kind and nature
      relating  to its  use  and  occupation  of the  Subleased  Premises  . The
      Subtenant  acknowledges  that it has reviewed the Lease attached hereto as
      Schedule "B" and is familiar with it. The Subtenant  further  acknowledges
      and agrees  that the  Sublandlord  shall have all the rights and  remedies
      against  the   Subtenant  in  respect  of  this  Sublease  as  though  the
      Sublandlord  was the landlord named in the Lease and the Subtenant was the
      tenant named in the Lease,  mutatis  mutandis,  in relation to the matters
      which are expressly dealt with in this Sublease.

                                       5
<PAGE>

15.   INDEMNITY BY SUBTENANT

      Except for occurrences resulting from the negligence or willful misconduct
      of the Landlord or the  Sublandlord  or those for whom the Landlord or the
      Sublandlord  are responsible at law, the Subtenant shall be liable for and
      shall  indemnify  the  Sublandlord  from and against all claims,  actions,
      damages, liabilities and expenses for any breach or non-performance of any
      term or provision of this Sublease by the Subtenant or in connection  with
      losses of life,  personal injury,  damage to property,  or any other loss,
      damage or  injury,  whether or not of a nature  related  to the  foregoing
      arising  from any  occurrence  on the  Subleased  Premises  for  which the
      Subtenant  is  responsible  at law;  or from the  occupancy  or use of the
      Subleased  Premises by the Subtenant or occasioned wholly or in part by an
      act or  omission of the  Subtenant,  its agents,  servants,  employees  or
      contractors or by anyone permitted by the Subtenant to be on the Subleased
      Premises . In case the  Sublandlord,  without fault on its part, is made a
      party to litigation  begun by or against the  Subtenant,  excepting a bona
      fide action by the Subtenant  against the Sublandlord,  the Subtenant will
      protect and hold harmless the Sublandlord and will pay all costs, expenses
      and  reasonable  legal  fees  incurred  or  paid  by  the  Sublandlord  in
      connection  with the  litigation.  The Subtenant  will also pay all costs,
      expenses  and  reasonable  legal  fees  incurred  by  the  Sublandlord  in
      enforcing the terms and covenants of the  Subtenant  under this  Sublease.
      Any  obligation of the Subtenant to indemnify the  Sublandlord  hereunder,
      shall  survive  the  termination  of this  Sublease  in  respect  of every
      happening during the Term.

16.   EXCULPATORY PROVISION

      Except for occurrences resulting from the negligence or willful misconduct
      of the Landlord or the Sublandlord,  or those for whom the Landlord or the
      Sublandlord are  responsible at law, the  Sublandlord  shall not be liable
      for  death of or  injury  to the  Subtenant  or  others  on the  Subleased
      Premises,  or for the loss of or damage to  property of the  Subtenant  or
      others by theft or  otherwise.  Without  limiting  the  generality  of the
      foregoing,  the Sublandlord shall not be liable for death, injury, loss or
      damage of or to  persons  or  property  resulting  or  arising  from fire,
      explosion,  falling plaster, steam, gas, electricity,  water, rain or snow
      or leaks  from  any  part of the  Subleased  Premises  or from the  pipes,
      appliances or plumbing works or from the road,  street or  subsurface,  or
      from any other place,  or by  dampness,  or by other cause of any kind and
      the Sublandlord is not liable for death,  injury, loss or damage caused by
      other tenants or occupants or other  persons in the Subleased  Premises or
      in any  other  part  of the  Building,  or  resulting  from  construction,
      alteration  or repair  of the  Subleased  Premises  or the  Building.  All
      property of the Subtenant kept or stored in the Subleased Premises will be
      kept or stored at the risk of the Subtenant  only and the  Subtenant  will
      hold the Sublandlord harmless from all claims arising out of damage to it,
      including subrogation claims (if any) by the Subtenant's insurers.

                                       6
<PAGE>

17.   INDEMNITY BY THE SUBLANDLORD

      The  Sublandlord  shall indemnify and hold harmless the Subtenant from and
      against any injury and damage to the person or  property of the  Subtenant
      where the injury and damage is caused by  negligence  of the  Sublandlord,
      its agents,  servants,  employees  or  contractors  or others for whom the
      Sublandlord  is  responsible  at law or any  injury or damage to person or
      property as a result of any breach or  non-performance  of any covenant or
      term  required to be observed and performed by the  Sublandlord  under the
      Lease or this Sublease.

18.   DEFAULT AND RE-ENTRY

      It is agreed that (hereinafter called "an event of default"):

      (i)   if the  Subtenant  shall be in  default  in the  payment  of Rent or
            amounts  collectable  hereunder  as  rent  and  such  default  shall
            continue  for a  period  of  five  (5)  days  after  notice  by  the
            Sublandlord  to the Subtenant of such default and requiring the same
            to be remedied; or

      (ii)  if the  Subtenant  shall be in default of any of its  covenants  and
            agreements hereunder (other than its covenant to pay Rent or amounts
            collectable hereunder as rent) and such default shall continue for a
            period  of  fifteen  (15)  days (or  such  longer  period  as may be
            reasonably  necessary  to cure such default  considering  the nature
            thereof)  after notice by the  Sublandlord  to the Subtenant of such
            default and requiring the same to be remedied; or

      (iii) if the  Subtenant  shall  make  an  assignment  for  the  benefit of
            creditors,  or shall make an  assignment  or have a receiving  order
            made against it under the  Bankruptcy  Act, or becoming  bankrupt or
            insolvent or shall make  application for relief under the provisions
            of any  statute now or  hereafter  in force  concerning  bankrupt or
            insolvent  debtors,   or  any  action  whatsoever,   legislative  or
            otherwise, shall be taken with a view to the winding-up, dissolution
            of or liquidation of the Subtenant; or

      (iv)  if the term of this Sublease  hereby  granted or any of the goods or
            chattels  on the  Subleased  Premises  are at  any  time  possessed,
            seized,  or taken in execution or  attachment by any creditor of the
            Subtenant; or

      (v)   if a writ of execution or replevin order issues against the goods or
            chattels of the Subtenant;

            Then, at the option of the  Sublandlord,  the current  month's Rent,
            together  with the Rent for the  three  (3)  months  ensuing,  shall
            immediately  become  due  and  payable  and,  at the  option  of the
            Sublandlord,  the term hereby  granted  shall become  forfeited  and
            void,  and the  Sublandlord  may without notice or any form of legal
            process whatsoever  forthwith re-enter upon the Subleased  Premises,
            or any part  thereof,  in the name of the  whole and  repossess  and
            enjoy  the same as its  former  estate,  anything  contained  in any

                                       7
<PAGE>

            statute  or law to the  contrary  notwithstanding.  No  re-entry  or
            taking possession of the Subleased Premises shall be construed as an
            election on the part of the  Sublandlord  to terminate this Sublease
            unless at the time of or  subsequent  to such  re-entry or taking of
            possession  written  notice of such  intention has been given to the
            Subtenant.

            Forfeiture of this Sublease by the Subtenant shall be wholly without
            prejudice to the right of the Sublandlord to recover arrears of Rent
            or damages for any antecedent  breach of covenant on the part of the
            Subtenant and, notwithstanding any such forfeiture,  the Sublandlord
            may subsequently recover from the Subtenant damages for loss of Rent
            suffered by reason of the Sublease having been  terminated  prior to
            the end of the  Term of this  Sublease  as set out  herein  and this
            subsection and the rights hereunder shall survive the termination of
            this Sublease  whether by act of the parties or by operation by law.
            The rights and remedies of the Sublandlord under this Section 17 are
            in addition to the rights and remedies of the  Sublandlord at law or
            as contained in the Lease.

19.   GENERAL

      Subject to the  provisions of this Sublease  respecting  assignment,  this
      Sublease shall enure to the benefit of and be binding upon the Sublandlord
      and the Subtenant and their respective  successors and permitted  assigns.
      In the event that there is any conflict between the terms of the Lease and
      the terms and conditions  contained in this  Sublease,  then the terms and
      conditions contained in this Sublease shall govern.

      This Sublease  shall be construed in  accordance  with and governed by the
      laws of the Province of Alberta.

      This Sublease or a counterpart  hereof may be executed and  transmitted by
      fax,  with  transmission  confirmed as complete,  and if so,  executed and
      transmitted,  this  Sublease  shall be for all purposes as  effective  and
      binding  upon such  party as if such  party had  delivered  an  originally
      executed  document.  A party transmitting an executed document by telecopy
      shall forthwith deliver the original of the executed document.

20.   ARBITRATION

      Any  dispute,  controversy  or claim  arising  out of or  relating to this
      Sublease, or the breach, termination or validity thereof, shall be settled
      by  arbitration in front of a single  arbitrator  agreed to by the parties
      or, failing that,  appointed by the Court of Queen's Bench,  in accordance
      with the Arbitration Act (Alberta) as then in force.

                                       8
<PAGE>

21.   OTHER

      It is  understood  that this  Sublease  does not provide for any  renewal,
      right  of  first  refusal  or any  Landlord  inducements  in  favor of the
      Subtenant.

22.   REPRESENTATIONS

      The Subtenant acknowledges that there are no representations,  conditions,
      warranties,  or collateral  agreements,  express or implied, made by or on
      behalf of the Sublandlord other than are expressed herein.

23.   GOODS AND SERVICES TAX

      The Subtenant  shall be responsible  for and pay to the Sublandlord on the
      same date as the  payments  of Basic Rent,  Additional  Rent and all other
      amounts are due, all taxes,  charges,  sums and amounts as contemplated in
      an Act to amend the Excise Tax Act and  related  Acts,  Statutes of Canada
      1990,  c.45, as amended from time to time, or any legislation  substituted
      therefore  (the  "Excise Tax Act")  whether  characterized  as a goods and
      services tax,  value added tax,  consumption  tax,  sales tax or otherwise
      (except income taxes under the Income Tax Act (Canada),  (collectively the
      "GST") arising in connection  with or by virtue of the supply of any goods
      or services by the Landlord or the  Sublandlord  to, or for the benefit of
      the Subtenant, or the payment by the Subtenant to the Sublandlord of Basic
      Rent or  Additional  Rent  pursuant  to this  Sublease  or the Lease . The
      amount of the GST shall be  calculated by the  Sublandlord  and payable by
      the Subtenant on the dates  stipulated  herein.  Unless  otherwise  noted,
      amounts quoted in this Sublease do not include GST.

24.   NOTICES

      Any notices  herein  provided or permitted to be given under this Sublease
      shall be addressed as follows:

      (i)   Notice by the  Subtenant to the  Sublandlord:  Paradigm  Geophysical
            Canada Ltd. 1700,125-9th Avenue SW
            Calgary, AB
            T2G OP6
            Attention: Mary Rayner
            Fax: 403-750-3536

      (ii)  Notice by the Sublandlord to Subtenant: Brycol Consulting Ltd. 2500,
            520 - 5th Avenue SW Calgary, AB,
            Attention: Paul James Hookman
            Fax: 403-234-0301

                                       9
<PAGE>

IN WITNESS  WHEREOF Brycol  Consulting  Ltd. does hereby accept this Sublease of
the Subleased Premises to be held by it as Subtenant, subject to the conditions,
restrictions and covenants set forth herein.

The Sublease has been executed by the parties as of the day and year first above
written.
Subtenant

Per:  /s/ Paul James Hookham               Per: /s/ M. Rayner
   --------------------------------           ----------------------------------
      BRYCOL CONSULTING LTD.               PARADIGM GEOPHYSICAL CANADA LTD.

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