NON-COMPETITION AGREEMENT


         NON-COMPETITION  AGREEMENT (this  "Agreement")  dated as of January 27,
1997 by C.D.  Siegfried  (the  "Employee")  for the benefit of 3-D  Geophysical,
Inc., a Delaware  corporation  ("3-D"),  and 3-D Geophysical of Canada,  Inc., a
Canadian corporation ("3-D Canada").


         WHEREAS,  the Employee has been an employee of the Company for a number
of years;


         WHEREAS, all of the outstanding capital stock of the J.R.S. Exploration
Company Limited an Alberta corporation (the "Company"), has been acquired by 3-D
pursuant to that certain Stock Purchase  Agreement dated as of December 10, 1996
by and among 3-D, 3-D Canada,  D.E.  Janveau,  Gladys  Mueller and W.G.  Mueller
(collectively, the "Vendors")(the "Stock Purchase Agreement");


         WHEREAS, the Employee  acknowledges that 3-D and 3-D Canada have paid a
substantial  price  to  acquire  the  Company  from the  Vendors,  and it is the
intention of 3-D, 3-D Canada and the Vendors that the Company  shall be entitled
exclusively to the benefits of the goodwill, trade secrets,  proprietary rights,
know-how and customer and client relationships heretofore established, developed
and maintained by the Company, whether or not through the services or efforts of
the Employee as an employee of the Company; and




         WHEREAS,  to induce  3-D and 3-D  Canada  to enter  the Stock  Purchase
Agreement,  the  Employee  agreed that at the Closing  under the Stock  Purchase
Agreement it would enter into this  Agreement not to compete with the Company on
the terms and conditions set forth below;


         NOW,  THEREFORE,  in consideration of the premises,  the acquisition by
3-D and 3-D  Canada  of all of the  outstanding  capital  stock  of the  Company
pursuant to the Stock Purchase Agreement, the Employee,  intending to be legally
bound, hereby agrees as follows:


         Section 1.  Restrictive Covenants.


         1.1  Covenant Not to Compete.  During the Term (as defined  therein) of
the  Employment  Agreement  of even date  herewith  between  the Company and the
Employee  (the  "Employment  Agreement"),  the  Employee  will  not in any  way,
directly or indirectly, as an agent, employee,  officer, director,  stockholder,
partner  or  otherwise  of any  corporation,  partnership  or other  venture  or
enterprise compete with the Company, 3-D or any of their respective subsidiaries
in the  provision  of seismic  data  acquisition  or  analysis  services  or any
services related thereto (a "Competing  Business") within the territorial limits
of the Province of Alberta,  the other provinces and territories of Canada,  the
United  States of America and the  countries  forming  part of Central and South
America.


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         1.2  Non-Solicitation  Covenant.  During  the  Term  of the  Employment
Agreement  and for a  period  of one  (1)  year  after  the  termination  of the
Employment Agreement for any reason whatsoever,  the Employee shall not solicit,
sell to or  contract  with,  on  behalf  of the  Employee  or on  behalf  of any
Competing Business,  any person or entity to which the Company or any subsidiary
of the Company shall have provided seismic data acquisition or analysis services
at any time during such four (4) year period.


         1.3 Remedies.  The Employee hereby agrees that all restrictions imposed
upon the Employee hereunder are reasonable,  fair and valid, and all defenses to
the  strict  enforcement  of the  provisions  hereof  are  hereby  waived by the
Employee.  The  Employee  further  agrees  that  in the  event  of a  breach  or
threatened  breach of any of the  covenants  contained  in this  Section  1, the
Company's  remedy at law is likely to be  inadequate  and that  accordingly  the
Company will be entitled to obtain an injunction or other equitable  relief with
regard thereto  without  proving damages or that damages would not constitute an
adequate  remedy.  If the final  judgment of a court of  competent  jurisdiction
declares   that  any  term  or  provision  of  this  Section  1  is  invalid  or
unenforceable,  in whole or in part,  the  parties  hereto  agree that the court
making the determination of invalidity or unenforceability  shall have the power
to, and is hereby directed to, reduce the scope, duration or area of the term or
provision  by deleting  specific  words or phrases as  necessary  to comply with
applicable law or to be enforceable by a


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court of competent  jurisdiction  or by replacing  any invalid or  unenforceable
term or provision  with a term or provision  that is valid and  enforceable  and
that comes closest to expressing the intention of the invalid and  unenforceable
term or provision, and this Agreement shall be enforceable as so modified.

         2.   Miscellaneous Provisions.


         2.1 Notices. All notices and demands of any kind which any party hereto
may be  required or desire to serve upon  another  party under the terms of this
Agreement shall be in writing and shall be served upon such other party:  (a) by
personal  service upon such other party at such other party's  address set forth
below in this  Section  2.1; or (b) by mailing a copy  thereof by  certified  or
registered mail, postage prepaid,  with return receipt  requested,  addressed to
such other  party at the  address of such  other  party set forth  below in this
Section 2.1; or (c) by sending a copy thereof by Federal  Express or  equivalent
courier  service,  addressed  to such other  party at the  address of such other
party set forth below in this  Section  2.1; or (d) by sending a copy thereof by
facsimile  to such other party at the  facsimile  number,  if any, of such other
party set forth below in this Section 2.1.


               In case of  service  by Federal  Express  or  equivalent  courier
service or by facsimile  or by personal  service,  such service  shall be deemed
complete  upon  receipt.  In the case of service by mail,  such service shall be
deemed complete upon


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reasonable  proof of receipt.  The address and  facsimile  number to which,  and
person to whose attention, notices and demands shall be delivered or sent may be
changed from time to time by notice  served,  as  hereinabove  provided,  by any
party upon the other party.


               The current addresses and facsimile numbers of the parties are:

                           If to the Employee:

                           C.D. Siegfried
                           c/o J.R.S. Exploration Company Limited
                           4750 30th Street S.E.
                           Calgary, Alberta T2B271
                           Telecopier No.: (403) 264-0478

                           If to the Company:

                           J.R.S. Exploration Company Limited
                           4750 30th Street S.E.
                           Calgary, Alberta T2B271
                           Attention:  Chief Financial Officer
                           Telecopier No.: (403) 264-0478

                           with copies to:

                           3-D Geophysical, Inc.
                           599 Lexington Avenue
                                 Suite 4102
                           New York, New York 10022
                           Telecopier No.: (212) 317-9230
                           Attention:  Joel Friedman, Chairman

                                      -and-

                           Kramer, Levin, Naftalis & Frankel
                           919 Third Avenue
                           New York, New York 10022
                           Telecopier No.: (212) 715-8000
                           Attention: Peter S. Kolevzon, Esq.


         2.2 Entire  Agreement;  Amendment.  This Agreement  contains the entire
agreement between the parties  respecting the subject matter hereof,  merges all
prior negotiations, agreements and


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understandings,  if any, respecting the subject matter hereof and states in full
all   representations,   warranties  and  agreements  which  have  induced  this
Agreement.  Each party  agrees  that in dealing  with third  parties no contrary
representations  will be made.  This  Agreement may not be amended,  modified or
otherwise changed orally but only by an agreement in writing signed by the party
against whom enforcement of any amendment, modification or change is sought.


         2.3 Assignment;  Binding Nature; Assumption. This Agreement shall inure
to the benefit of and be enforceable by, and may be assigned in whole or in part
by 3-D and 3-D Canada  to,  any  purchaser  of all or  substantially  all of the
business or assets of the  Company,  3-D or 3-D  Canada,  any  successor  to the
Company,  3-D or 3-D Canada or any assignee thereof (whether direct or indirect,
by purchase,  merger,  consolidation  or  otherwise).  This Agreement may not be
assigned by the Employee without the prior written consent of 3-D.

         2.4  Nonwaiver.  No  waiver  by any  party of any  term,  provision  or
covenant  contained in this Agreement (or any breach thereof) shall be effective
unless it is in writing executed by the party against which such waiver is to be
enforced;  no waiver  shall be deemed or  construed  as a further or  continuing
waiver of any such term, provision or covenant (or breach) on any other occasion
or as a waiver of any other term, provision or covenant (or of the breach of any
other term,  provision or covenant)  contained in this  Agreement on the same or
any other occasion.


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         2.5 Remedies.  The remedies provided for or permitted by this Agreement
shall be  cumulative  and the  exercise by any party of any remedy  provided for
herein or otherwise  available  shall not preclude the  assertion or exercise by
such  party of any  other  right or remedy  provided  for  herein  or  otherwise
available.


         2.6  Headings.   The  headings  in  this  Agreement  are  inserted  for
convenience only and shall not constitute a part hereof.


         2.7  Construction.  In this  Agreement (i) words  denoting the singular
include  the plural and vice  versa,  (ii) "it" or "its" or words  denoting  any
gender include all genders,  (iii) any reference herein to a Section refers to a
Section of the Agreement,  unless  otherwise  stated,  (iv) when calculating the
period of time within or  following  which any act is to be done or steps taken,
the date which is the reference day in calculating such period shall be excluded
and if the last day of such period is not a business  day, then the period shall
end on the next day which is a  business  day,  and (v) all dollar  amounts  are
expressed in Canadian funds.


         2.8 Governing Law. This  Agreement  shall be governed by, and construed
and enforced in accordance with, the laws of the Province of Alberta  applicable
to contracts made and to be entirely performed therein.


         2.9  Counterparts.  For the  convenience of the parties,  any number of
counterparts hereof may be executed, each such executed


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counterpart shall be deemed an original and all such counterparts together shall
constitute one and the same instrument.








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               IN WITNESS WHEREOF,  the Employee has executed and delivered this
Agreement as of the date and year first written above.

                                              EMPLOYEE:


                                              /s/ C.D. Siegfried
                                              --------------------
                                              C.D. Siegfried


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