SECURITY AGREEMENT


         THIS  SECURITY  AGREEMENT  dated as of May 29, 1996,  is by and between
PARAGON GEOPHYSICAL,  INC., a Delaware corporation (the "Debtor"), whose address
is set forth on its signature page hereto,  and FIRST  INTERSTATE BANK OF TEXAS,
N.A., a national  banking  association (the "Secured  Party"),  whose address is
1000 Louisiana, Houston, Texas 77002.

                                R E C I T A L S:

         A. 3-D Geophysical,  Inc., a Delaware corporation (the "Borrower"), and
the Secured  Party have entered  into that  certain Loan  Agreement of even date
herewith (such Loan Agreement,  as the same may be amended or modified from time
to time,  being  hereinafter  referred to as the "Loan  Agreement")  pursuant to
which Secured  Party has agreed to make to Borrower (i) a revolving  credit loan
in the aggregate  principal amount not to exceed  $3,000,000.00  and (ii) a term
loan in the aggregate principal amount not to exceed $15,000,000.00,  subject to
the  terms and  conditions  of the Loan  Agreement.  Terms  defined  in the Loan
Agreement and not otherwise defined herein being used as defined therein).

         B. The Secured Party has  conditioned  its  obligations  under the Loan
Agreement upon the execution and delivery of this Agreement by the Debtor.

         NOW  THEREFORE,  in  consideration  of the  premises and other good and
valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby
acknowledged, the parties hereto agree as follows:

                                    ARTICLE I

                                   Definitions

         Section  1.1.  Definitions.  All terms used herein which are defined in
the  Uniform  Commercial  Code as adopted and in effect from time to time in the
State of Texas ("UCC") shall have the same meanings  herein as in the UCC unless
the  context  in which  such  terms are used  herein  indicates  otherwise.  All
capitalized  terms used but not otherwise defined herein or which are defined in
the UCC that are defined in the Loan Agreement shall have the meanings  ascribed
to such terms in the Loan  Agreement,  the  applicable  provisions of which Loan
Agreement are incorporated herein.









                                   ARTICLE II

                                Security Interest

         Section  2.1.  Security  Interest.  To secure  the prompt  payment  and
performance in full of the Obligations,  Debtor hereby grants to Secured Party a
security interest in, and assigns and pledges,  the following property,  whether
now owned or existing or hereafter  arising or acquired and wherever  arising or
located (such property being hereinafter sometimes called the "Collateral"):

              (a) all accounts,  accounts  receivable,  documents,  instruments,
         chattel  paper,  general  intangibles  of  Debtor,  including,  without
         limitation, all income tax returns, copyrights, patents, patent rights,
         trademarks,  tradenames,  tradestyles,  goodwill,  going concern value,
         franchise  and  distributorship   agreements,   whether  now  owned  or
         hereafter acquired, and all products and proceeds thereof;

              (b) all equipment,  inventory,  machinery, and fixtures of Debtor,
         whether now owned or hereafter acquired, and all accessions thereto and
         all products and proceeds thereof,

              (c) all  investment  property  of  Debtor,  whether  now  owned or
         hereafter  acquired,  and all  accessions  thereto and all products and
         proceeds thereof;

              (d)  the  Lockbox  Account,  any  other  deposit  accounts  now or
         hereafter  maintained  by Debtor at or with Secured Party and all cash,
         checks,  instruments,  securities,  funds and monies  now or  hereafter
         deposited in the foregoing; and

              (e) all books and records (including computer software, diskettes,
         information  stored  in  computers  and  the  like)  pertaining  to the
         property described in clauses (a) and (d) above.

         Section 2.2.  Debtor Remains  Liable.  Notwithstanding  anything to the
contrary  contained  herein,  (a) the  Debtor  shall  remain  liable  under  the
contracts  and  agreements  included in the  Collateral  to the extent set forth
therein to perform  all of its duties  and  obligations  thereunder  to the same
extent as if this  Agreement  had not been  executed,  (b) the  exercise  by the
Secured Party of any of its rights  hereunder  shall not release the Debtor from
any of its duties or obligations under the contracts and agreements  included in
the  Collateral,  and (c) the  Secured  Party shall not have any  obligation  or
liability  under any of the contracts and agreements  included in the Collateral
by reason of this Agreement, nor shall the Secured Party be obligated to perform
any of the obligations or duties of the Debtor  thereunder or to take any action
to collect or enforce any claim for payment assigned hereunder.


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                                   ARTICLE III

                         Representations and Warranties

         To induce the Secured  Party to enter into this  Agreement and the Loan
Agreement, the Debtor represents and warrants to the Secured Party that:

          Section  3.1.  Title.  The Debtor is, and with  respect to  Collateral
acquired  after the date  hereof  the Debtor  will be, the legal and  beneficial
owner of the Collateral free and clear of any Lien, security interest,  or other
encumbrance.

         Section 3.2.  Accounts.  Unless the Debtor has given the Secured  Party
written notice to the contrary, whenever the security interest granted hereunder
attaches  to an  account,  the Debtor  shall be deemed to have  represented  and
warranted to the Secured  Party as to each and all of its accounts that (a) each
account is genuine and in all respects  what it purports to be, (b) each account
represents  the legal,  valid,  and binding  obligation  of the  account  debtor
evidencing  indebtedness  unpaid and owed by such account  debtor arising out of
the performance of labor or services by the Debtor or the sale or lease of goods
by the  Debtor,  (c) the  amount  of each  account  represented  as owing is the
correct  amount  actually  and  unconditionally  owing  except for normal  trade
discounts  granted in the  ordinary  course of  business,  and (d) no account is
subject to any offset, counterclaim, or other defense.

         Section 3.3. Financing  Statements.  No financing  statement,  security
agreement,  or other Lien instrument  covering all or any part of the Collateral
is on file in any public  office,  except as may have been filed in favor of the
Secured Party pursuant to this Agreement.

         Section  3.4.  Principal  Place of  Business.  The  principal  place of
business  and chief  executive  office of the Debtor,  and the office  where the
Debtor  keeps its books and  records,  is located  at the  address of the Debtor
shown at the beginning of this Agreement.

         Section 3.5. Location of Collateral;  Markings. Debtor intends to place
all or part of the  Collateral  on  certain  vessels  (collectively,  "Vessel").
Debtor shall advise and notify  Secured Party in writing from time to time,  and
at any time upon Secured  Party's  request,  the name, flag and name of owner of
the  Vessels on which the  Collateral  is located;  or, if not on a Vessel,  the
other  location of such  Collateral.  Debtor  agrees to mark all  equipment  and
inventory  Collateral  now or  hereafter  located on a Vessel  with a  prominent
nameplate  indicating that the Debtor owns such Collateral and Secured Party has
a Lien thereon.

         Section 3.6.  Perfection.  Upon the filing of Uniform  Commercial  Code
financing  statements in the jurisdictions listed on Schedule 2 attached hereto,
and upon the Secured Party's obtaining possession of all documents, instruments,
and chattel paper of the Debtor,  the security  interest in favor of the Secured
Party  created  herein  will  constitute  a valid  and  perfected  Lien upon and
security interest in the Collateral, subject to no equal or prior Lien.


                                       -3-







         Section 3.7.  Inventory.  All inventory has been produced in compliance
with all requirements of the Fair Labor Standards Act.

         Section 3.8. Independent  Investigation.  The Debtor has, independently
and without  reliance upon the Secured  Party and based upon such  documents and
information  as it has  deemed  appropriate,  made its own credit  analysis  and
decision to enter into this Agreement.  There are no conditions precedent to the
full  effectiveness  of this Agreement that have not been fully and  permanently
satisfied.

         Section 3.9. Intellectual Property. No patents, trademarks, copyrights,
rights of use or other intellectual property are necessary,  advisable or useful
for the conduct of Debtor's business and Debtor has none of the same.

         Section  3.10.  Benefit  to  Debtor.  The  value  of the  consideration
received  and to be received by the Debtor as a result of the  Borrower  and the
Secured  Party  entering into the Loan  Agreement  and the Debtor  executing and
delivering this Agreement is reasonably  worth at least as much as the liability
and  obligation of the Debtor  hereunder,  and such liability and obligation and
the  Borrower's  entering  into  the  Loan  Agreement  have  benefited  and  may
reasonably be expected to benefit the Debtor directly and indirectly.

                                   ARTICLE IV

                                    Covenants

         The Debtor  covenants  and agrees with the Secured Party that until the
Obligations  are paid and performed in full and all  commitments  of the Secured
Party to the Borrower and the Debtor have terminated:

         Section 4.1. Maintenance.  Debtor shall maintain the Collateral in good
operating  condition and repair and shall not permit any waste or destruction of
the  Collateral  or any  part  thereof.  Debtor  shall  not  use or  permit  the
Collateral to be used in violation of any law or  inconsistently  with the terms
of any policy of insurance.  Debtor shall not use or permit the Collateral to be
used in any  manner  or for any  purpose  that  would  impair  the  value of the
Collateral or expose the Collateral to unusual risk.

         Section  4.2.  Liens  and  Encumbrances.  (a)  Neither  Debtor,  owner,
charterer,  agent,  master,  nor any member of the crew of any Vessel  has,  nor
shall  have,  any right,  power or  authority  to create,  incur or permit to be
placed or imposed on any  Collateral,  or any part thereof,  any lien whatsoever
other than to Secured  Party.  Debtor shall defend the Collateral  against,  any
lien,  security  interest,  or other  encumbrance on the  Collateral  except the
security  interest of Secured Party hereunder,  and shall defend Debtor's rights
in the  Collateral  and Secured  Party's  security  interest  in the  Collateral
against the claims of all persons and  entities.  Debtor  shall  further  obtain
consent from the owner of each of the Vessel,  each  mortgagee of real  property
owned by Debtor,  and each landlord of real property leased by Debtor upon which
any

                                       -4-







Collateral  is  located  not to  create,  permit,  or  suffer to exist any lien,
security interest, or other encumbrances on the Collateral.

         (b) Debtor  shall  promptly  pay and  discharge,  or caused to be paid,
discharged and released, any and all taxes,  assessments,  governmental charges,
fines,  penalties, or Liens that may attach to or be imposed upon the Collateral
by virtue that the  Collateral is located on the Vessel.  If any Vessel shall be
detained seized,  levied upon or taken into custody under process or under color
of any  authority,  Debtor shall  promptly  notify  Secured Party in writing and
shall promptly cause the Vessel to be discharged or released therefrom.

         Section  4.3.  Modification  of  Accounts.  Debtor  shall do nothing to
impair the rights of  Secured  Party in the  Collateral.  The Debtor  shall,  in
accordance with prudent business  practices,  endeavor to collect or cause to be
collected from each account debtor under its accounts,  as and when due, any and
all amounts owing under such accounts.  Without the prior written consent of the
Secured  Party,  the Debtor  shall not (a) grant any  extension  of time for any
payment with respect to any of the accounts, (b) compromise, compound, or settle
any of the accounts for less than the full amount thereof, (c) release, in whole
or in part,  any Person  liable  for  payment  thereof,  (d) allow any credit or
discount  for payment  with  respect to any account  other than (i) normal trade
discounts  granted in the ordinary  course of business or (ii)  discounts not to
exceed (without  Secured Party's consent)  $_______  individually or $_______ in
the  aggregate  that are given to avoid a greater  loss or maximize  recovery of
monies due to Debtor, or (e) release any Lien,  security  interest,  or guaranty
securing any account.

         Section  4.4.  Disposition  of  Collateral.  The Debtor shall not sell,
lease,  assign (by operation of law or otherwise),  or otherwise  dispose of, or
grant any option with respect to, the Collateral or any part thereof without the
prior written consent of the Secured Party, except the Debtor may sell Inventory
in the ordinary course of business.

         Section  4.5.  Further  Assurances.  At any time and from time to time,
upon the request of the Secured  Party,  and at the sole  expense of the Debtor,
the Debtor  shall  promptly  execute and deliver all such  further  instruments,
agreements,  and documents and take such further action as the Secured Party may
deem necessary or desirable to preserve and perfect its security interest in the
Collateral  and  carry  out the  provisions  and  purposes  of  this  Agreement,
including,  without  limitation,  the  execution  and  filing of such  financing
statements as the Secured Party may require.  A carbon,  photographic,  or other
reproduction  of this  Agreement  or of any  financing  statement  covering  the
Collateral or any part thereof shall be sufficient as a financing  statement and
may be filed as a financing statement.

         Section 4.6. Risk of Loss;  Insurance.  Debtor shall be responsible for
any loss of or damage to the Collateral. Debtor shall maintain, with financially
sound and reputable  companies,  insurance  policies (i) insuring the Collateral
against all marine risks, loss by fire,  explosion,  theft, and such other risks
and casualties as are customarily  insured  against by companies  engaged in the
same or a similar  business,  and (ii) insuring Debtor and Secured Party against
liability for personal  injury and property  damage  relating to the Collateral,
such policies

                                       -5-







to be in such amounts and covering such risks as are customarily insured against
by companies engaged in the same or a similar  business,  with losses payable to
Debtor and Secured Party as their  respective  interests may appear and with the
Secured Party being named as an  additional  assured  thereunder.  All insurance
with respect to the Collateral shall provide that no cancellation,  reduction in
amount,  or change in coverage  thereof shall be effective  unless Secured Party
has received 30 days prior  written  notice  thereof.  Debtor  shall  deliver to
Secured Party copies of all insurance  policies  covering the  Collateral or any
part thereof.

         Section 4.7. Inspection Rights.  Debtor shall permit and obtain consent
from the Vessel Owner to permit Secured Party and its representatives to examine
or inspect the Collateral  wherever  located and to examine,  inspect,  and copy
Debtor's books and records at any reasonable  time and as often as Secured Party
may desire.

         Section 4.8. Vessel Owner,  Mortgagee and Landlord Waivers, Etc. Debtor
shall cause each owner of a Vessel on which the Collateral is located to execute
and deliver  instruments  satisfactory  in form and  substance to Secured  Party
pursuant  to which  such  Vessel  owner (i) waives its  rights,  if any,  in the
Collateral,  (ii)  confirms  that it will not  create,  incur or place  upon any
Collateral  located  on  its  Vessel  any  Lien,  security  interest,  or  other
encumbrance,  (iii)  covenants  not to remove  the Vessel  from the  territorial
waters of the  United  States,  Canada  or Mexico in the Gulf of Mexico  without
prior written notification to Secured Party, (iv) confirms that there is no Lien
upon the Vessel or that it has notified the holder of the Lien that the Debtor's
Property located thereon is not the owner's nor the Vessel's,  and (v) covenants
not to abandon a Vessel in any port.  Debtor shall cause each  mortgagee of real
property owned by Debtor and each landlord of real property leased by the Debtor
upon which any of the  Collateral is located to execute and deliver  instruments
satisfactory  in form and  substance  to Secured  Party  pursuant  to which such
mortgagee or landlord (i) waives its rights, if any, in the Collateral, and (ii)
confirms that it will not create,  incur or place upon any Collateral located on
its property any Lien, security interest, or other encumbrance.

         Section 4.9. Corporate  Changes.  The Debtor shall not change its name,
identity,  or corporate  structure  in any manner that might make any  financing
statement filed in connection with this Agreement  seriously  misleading  unless
the Debtor  shall  have given the  Secured  Party 30 days prior  written  notice
thereof and shall have taken all action  deemed  necessary  or  desirable by the
Secured Party to make each  financing  statement not seriously  misleading.  The
Debtor shall not change its principal place of business, chief executive office,
or the place where it keeps its books and records unless it shall have given the
Secured  Party 30 days prior  written  notice  thereof  and shall have taken all
action deemed  necessary or desirable by the Secured Party to cause its security
interest in the  Collateral to be perfected  with the priority  required by this
Agreement.

         Section  4.10.  Books and Records;  Information.  The Debtor shall keep
accurate  and  complete  books and records of the  Collateral  and the  Debtor's
business and financial  condition in accordance with GAAP. The Debtor shall from
time to time at the request of the Secured  Party  deliver to the Secured  Party
such information regarding the Collateral and the Debtor as

                                       -6-







the  Secured  Party  may  request,  including,  without  limitation,  lists  and
descriptions of the Collateral and evidence of the identity and existence of the
Collateral.  The Debtor shall mark its books and records to reflect the security
interest of the Secured Party under this Agreement.

         Section  4.11.  Equipment  and  Inventory.  The  Debtor  shall keep the
equipment and inventory at the locations specified on Schedule 1 hereto or, upon
30 days prior written notice to the Secured  Party,  at such other places within
the United  States of America  where all action  required to perfect the Secured
Party's  security  interest in the  equipment  and  inventory  with the priority
required by this Agreement shall have been taken.

         Section 4.12. Warehouse Receipts Non-Negotiable. The Debtor agrees that
if any  warehouse  receipt or receipt  in the nature of a  warehouse  receipt is
issued in respect of any of the Collateral, such warehouse receipt or receipt in
the nature  thereof shall not be  "negotiable"  (as such term is used in Section
7.104 of the Uniform  Commercial Code as in effect in any relevant  jurisdiction
or under relevant law).

         Section 4.13.  Taxes.  The Debtor shall pay and  discharge,  before the
same become delinquent, all taxes, assessments, and governmental charges imposed
upon it or upon any of its property,  except Debtor shall not be required to pay
or discharge any such tax, assessment,  or governmental charge if (i) the amount
or validity thereof is being contested in good faith by proper proceedings being
diligently  pursued,  (ii) such  proceedings  do not  involve  any risk of sale,
forfeiture, or loss of the Collateral or any interest therein; or (iii) adequate
reserves therefor have been established in accordance with GAAP.

         Section  4.14.  Compliance  with Laws.  The Debtor  shall comply in all
material  respects with all applicable laws,  rules,  regulations,  orders,  and
decrees of any Governmental Authority or arbitrator.

         Section 4.15.  Compliance with  Agreements.  The Debtor shall comply in
all material respects with all agreements, contracts, and instruments binding on
it or affecting its properties or businesses.

         Section  4.16.  Notification.  The  Debtor  shall  promptly  notify the
Secured  Party of (a) any Lien made or asserted  against any of the  Collateral,
(b) any material change in any of the Collateral, including, without limitation,
any material damage to or loss of any of the  Collateral,  (c) the occurrence of
any other event that, with the giving of notice or lapse of time or both,  would
be an Event of Default.

         Section  4.17.  Collection  of  Accounts.  Accounts  shall be collected
through the Lockbox  (Secured Party,  recognizing  that some Accounts arising in
the first several months of this Agreement cannot effectively be directed to the
Lockbox). In connection with such collections,  the Debtor may take (and, at the
Secured Party's direction, shall take) such actions as the Debtor or the Secured
Party may deem necessary or advisable to enforce collection of the accounts.  In
addition  to the  foregoing,  the  Debtor  agrees  that if any  Proceeds  of any
Collateral (including

                                       -7-







payments  made in respect of  accounts)  shall be received by the Debtor  rather
than through the Lockbox, the Debtor shall promptly deliver such Proceeds to the
Secured Party with any necessary endorsements. Until such Proceeds are delivered
to the Secured Party, such Proceeds shall be held in trust by the Debtor for the
benefit of the Secured Party and shall not be commingled with any other funds or
property of the Debtor. All Proceeds of Collateral received by the Secured Party
pursuant to this Section may be applied by the Secured Party to the  Obligations
in such order and manner as the Secured Party may elect in its sole discretion.

         Section 4.18. Location of Collateral.  Debtor shall not move any of the
Collateral  from the Vessel or Vessels  identified  hereunder  without the prior
written consent of Secured Party.

         Section 4.19. Lockbox Account. The Debtor agrees to notify each account
debtor and other obligers to deliver all payments and amounts owed to the Debtor
directly  to the  Lockbox  and to  renotify,  from time to time and in any event
promptly upon request of the Secured Party,  those account  debtors and obligers
who do not deliver all payments  due to the Debtor  directly to the Lockbox that
the same must be delivered to the Lockbox (the Secured  Party being granted such
renotification right if the Debtor fails or refuses so to do). The Lockbox shall
be under the sole control of the Secured  Party.  The Debtor shall have no right
to effect  withdrawals from the Lockbox Account and the Lockbox Account shall be
maintained  in the name and under the domain and control of the  Secured  Party.
After  Default and upon  instructions  from 1/O,  funds to be  disbursed  to the
Borrower may be restricted or applied to the Obligations, or both.

                                    ARTICLE V

                             Rights of Secured Party

         Section 5.1. Power of Attorney.  Debtor hereby irrevocably  constitutes
and appoints Secured Party and any officer or agent thereof,  with full power of
substitution,  as its true and  lawful  attorney-in-fact  with full  irrevocable
power and  authority  in the name of Debtor or in its own name,  to take any and
all action and to execute any and all  documents and  instruments  which Secured
Party  at any time  and  from  time to time  deems  necessary  or  desirable  to
accomplish the purposes of this Agreement and,  without  limiting the generality
of the  foregoing,  Debtor  hereby  gives  Secured  Party the power and right on
behalf of Debtor and in its own name to do any of the following,  without notice
to or the consent of Debtor:

              (i) to demand, sue for, collect,  or receive in the name of Debtor
         or in its own  name,  any  money or  property  at any time  payable  or
         receivable on account of or in exchange for any of the Collateral  and,
         in connection therewith,  endorse checks,  notes, drafts,  acceptances,
         money  orders,  documents of title,  or any other  instruments  for the
         payment of money under the Collateral or any policy of insurance;

              (ii) to pay or discharge  taxes,  liens,  security  interests,  or
         other  encumbrances  levied  or  placed on or  threatened  against  the
         Collateral;


                                       -8-







              (iii) to send  requests for  verification  to account  debtors and
         other obligers;

              (iv) to notify post office  authorities  to change the address for
         delivery of mail of Debtor to an address  designated  by Secured  Party
         and to receive, open, and dispose of mail addressed to Debtor;

              (v) (A) to direct account debtors and any other parties liable for
         any payment under any of the  Collateral to make payment of any and all
         monies due and to become due thereunder directly to Secured Party or as
         Secured Party shall direct;  (B) to receive  payment of and receipt for
         any and all monies,  claims, and other amounts due and to become due at
         any time in respect of or arising  out of any  Collateral;  (C) to sign
         and endorse any invoices,  freight or express  bills,  bills of lading,
         storage or warehouse  receipts,  drafts against  debtors,  assignments,
         proxies,  stock powers,  verifications,  and notices in connection with
         accounts  and  other  documents  relating  to  the  Collateral;  (D) to
         commence and  prosecute  any suit,  action,  or proceeding at law or in
         equity in any court of competent jurisdiction to collect the Collateral
         or any part  thereof  and to enforce  any other right in respect of any
         Collateral;  (E) to defend  any suit,  action,  or  proceeding  brought
         against  Debtor  with  respect  to  any  Collateral;   (F)  to  settle,
         compromise,  or adjust any suit, action, or proceeding  described above
         and, in connection  therewith,  to give such  discharges or releases as
         Secured  Party  may  deem  appropriate;  (G)  to  exchange  any  of the
         Collateral   for  other   property  upon  any  merger,   consolidation,
         reorganization,  recapitalization,  or other readjustment of the issuer
         thereof and, in  connection  therewith,  deposit any of the  Collateral
         with any committee,  depositary,  transfer agent,  registrar,  or other
         designated  agency upon such terms as Secured Party may determine;  (H)
         to add or release any guarantor,  endorser,  surety,  or other party to
         any of the  Collateral or the  Obligations;  (I) to renew,  extend,  or
         otherwise  change the terms and  conditions of any of the Collateral or
         Obligations;  (J) to insure, and to make, settle, compromise, or adjust
         claims under any insurance policy covering, any of the Collateral;  and
         (K) to sell,  transfer,  pledge,  make any agreement with respect to or
         otherwise  deal with any of the  Collateral as fully and  completely as
         though  Secured Party were the absolute owner thereof for all purposes,
         and to do, at Secured Party's option and Debtor's expense, at any time,
         or from time to time,  all acts and things  which  Secured  Party deems
         necessary  to protect,  preserve,  or realize upon the  Collateral  and
         Secured Party's security interest therein.

         This power of attorney is a power coupled with an interest and shall be
irrevocable.  Secured  Party shall be under no duty to exercise or withhold  the
exercise of any of the rights,  powers,  privileges,  and options  expressly  or
implicitly  granted to Secured Party in this Agreement,  and shall not be liable
for any  failure to do so or any delay in doing so.  SECURED  PARTY SHALL NOT BE
LIABLE FOR ANY ACT OR  OMISSION  OR FOR ANY ERROR OF  JUDGMENT OR ANY MISTAKE OF
FACT OR LAW IN ITS  INDIVIDUAL  CAPACITY OR IN ITS CAPACITY AS  ATTORNEY-IN-FACT
EXCEPT  ACTS OR  OMISSIONS  RESULTING  FROM  ITS  GROSS  NEGLIGENCE  OR  WILLFUL
MISCONDUCT.  This power of  attorney is  conferred  on Secured  Party  solely to
protect,

                                       -9-







preserve,  and realize upon its  security  interest in the  Collateral.  Secured
Party shall not be  responsible  for any decline in the value of the  Collateral
and shall not be  required to take any steps to preserve  rights  against  prior
parties or to protect, preserve, or maintain any security interest or lien given
to secure the Collateral.

         Section 5.2.  Performance by Secured Party.  If Debtor fails to perform
or comply with any of its agreements contained herein, Secured Party itself may,
at its sole discretion, cause or attempt to cause performance or compliance with
such agreement and the expenses of Secured Party, together with interest thereon
at the maximum  nonusurious per annum rate permitted by applicable law, shall be
payable by Debtor to Secured  Party on demand and shall  constitute  Obligations
secured by this Agreement. Notwithstanding the foregoing, it is expressly agreed
that  Secured  Party  shall not have any  liability  or  responsibility  for the
performance of any obligation of Debtor under this Agreement.

         Section 5.3.  Setoff;  Property  Held by Secured  Party.  Secured Party
shall have the right to set off and apply against the  Obligations,  at any time
and without notice to Debtor, and is hereby granted a contractual Lien and right
to setoff, any and all deposits (general or special, time or demand, provisional
or final) or other sums at any time  credited by or owing from Secured  Party to
Debtor whether or not the Obligations  are then due. As additional  security for
the Obligations,  Debtor hereby grants Secured Party a security  interest in all
money,  instruments,  and other  property  of Debtor  now or  hereafter  held by
Secured Party, including,  without limitation,  property held in safekeeping. In
addition  to Secured  Party's  right of setoff and as further  security  for the
Obligations,  Debtor  hereby  grants  Secured  Party a security  interest in all
deposits  (general or special,  time or demand,  provisional or final) and other
accounts of Debtor now or hereafter  deposited with or held by Secured Party and
all other sums at any time  credited by or owing from  Secured  Party to Debtor.
The rights and  remedies  of Secured  Party  hereunder  are in addition to other
rights and  remedies  (including,  without  limitation,  other rights of setoff)
which Secured Party may have.

         Section 5.4.  Assignment by Secured Party.  Secured Party may from time
to time assign the Obligations and any portion thereof and/or the Collateral and
any portion thereof, and the assignee shall be entitled to all of the rights and
remedies of Secured Party under this Agreement in relation thereto.

                                   ARTICLE VI

                                     Default

         Section 6.1. Upon the occurrence of an Event of Default,  Secured Party
shall have the  following  rights and remedies and may do any one or more of the
following:

              (i) Secured Party may declare the  Obligations or any part thereof
         immediately  due and  payable,  without  notice,  demand,  presentment,
         notice  of  dishonor,  notice  of  acceleration,  notice  of  intent to
         accelerate, notice of intent to demand, protest, or other

                                      -10-







         formalities  of any kind, all of which are hereby  expressly  waived by
         Debtor;  provided,  however,  that upon the  occurrence  of an Event of
         Default under Section 9.1(d) or Section  9.1(e) of the Loan  Agreement,
         the  Obligations  shall  become  immediately  due and  payable  without
         notice,   demand,   presentment,   notice   of   dishonor,   notice  of
         acceleration,  notice  of  intent  to  accelerate,  notice of intent to
         demand,  protest,  or other  formalities  of any kind, all of which are
         hereby expressly waived by Debtor.

              (ii) In  addition  to all other  rights  and  remedies  granted to
         Secured  Party  in  this  Agreement  and in  any  other  instrument  or
         agreement securing,  evidencing,  or relating to the Obligations or any
         part  thereof,  Secured Party shall have all of the rights and remedies
         of a  secured  party  under the UCC as  adopted  by the State of Texas.
         Without limiting the generality of the foregoing, Secured Party may (A)
         without  demand  or  notice  to  Debtor,  collect,   receive,  or  take
         possession  of the  Collateral or any part thereof and for that purpose
         Secured  Party may enter upon any premises on which the  Collateral  is
         located and remove the  Collateral  therefrom or render it  inoperable,
         and/or (B) sell, lease, or otherwise dispose of the Collateral,  or any
         part  thereof,  in one or more  parcels  at public or  private  sale or
         sales, at Secured Party's offices or elsewhere, for cash, on credit, or
         for future  delivery.  Upon the request of Secured Party,  Debtor shall
         assemble the  Collateral  and make it available to Secured Party at any
         place  designated  by Secured  Party that is  reasonably  convenient to
         Debtor and Secured Party. Debtor agrees that Secured Party shall not be
         obligated  to give more than five days  written  notice of the time and
         place of any public sale or of the time after  which any  private  sale
         may take place and that such notice shall constitute  reasonable notice
         of such  matters.  Debtor shall be liable for all expenses of retaking,
         holding,  preparing for sale,  or the like,  and all  attorneys'  fees,
         legal  expenses,  and all other costs and expenses  incurred by Secured
         Party in  connection  with the  collection of the  Obligations  and the
         enforcement  of Secured  Party's rights under this  Agreement.  Secured
         Party may apply the  Collateral  against the  Obligations in such order
         and manner as Secured  Party may elect in its sole  discretion.  Debtor
         shall remain  liable for any  deficiency if the proceeds of any sale or
         disposition of the Collateral are  insufficient  to pay the Obligations
         in full.  Debtor  waives  all rights of  marshalling  in respect of the
         Collateral.

              (iii) Secured Party may cause any or all of the Collateral held by
         it to be  transferred  into  the name of  Secured  Party or the name or
         names of Secured Party's nominee or nominees.

              (iv)  Secured  Party may  exercise  or cause to be  exercised  all
         voting rights and corporate powers in respect of the Collateral.


                                      -11-







                                   ARTICLE VII

                                  Miscellaneous

         Section 7.1. Expenses; Indemnification.  Debtor agrees to pay on demand
all  costs  and  expenses  incurred  by  Secured  Party in  connection  with the
preparation,  negotiation,  and  execution  of the  Agreement  and  any  and all
amendments,  modifications,  and supplements hereto. Debtor agrees to pay and to
hold Secured  Party  harmless  from and against all fees and all excise,  sales,
stamp,  and  other  taxes  payable  in  connection  with this  Agreement  or the
transactions  contemplated  hereby.  Debtor hereby indemnifies Secured Party and
each affiliate  thereof and their  respective  officers,  directors,  employees,
attorneys, and agents from, and holds each of them harmless against, any and all
losses, liabilities,  claims, damages, penalties, judgments, costs, and expenses
(including  attorneys'  fees) to  which  any of them may  become  subject  which
directly or indirectly arise from or relate to (i) the  negotiation,  execution,
delivery, performance,  administration,  or enforcement of this Agreement or any
other  instrument  or  agreement  securing,   evidencing,  or  relating  to  the
Obligations or any part thereof,  (ii) any of the  transactions  contemplated by
this Agreement or any other  instrument or agreement  securing,  evidencing,  or
relating to the  Obligations or any part thereof,  (iii) any breach by Debtor of
any  representation,  warranty,  covenant,  or other agreement contained in this
Agreement or any other instrument or agreement securing, evidencing, or relating
to the Obligations or any part thereof,  or (iv) any investigation,  litigation,
or   other   proceeding,   including,   without   limitation,   any   threatened
investigation, litigation, or other proceeding relating to any of the foregoing.
WITHOUT  LIMITING ANY PROVISION OF THIS  AGREEMENT OR ANY OTHER  INSTRUMENT,  OR
AGREEMENT  SECURING,  EVIDENCING,  OR  RELATING TO THE  OBLIGATIONS  OR ANY PART
THEREOF,  IT IS THE EXPRESS  INTENTION OF THE PARTIES HERETO THAT EACH PERSON OR
ENTITY TO BE INDEMNIFIED  UNDER THIS SECTION SHALL BE INDEMNIFIED  FROM AND HELD
HARMLESS AGAINST ANY AND ALL LOSSES,  LIABILITIES,  CLAIMS, DAMAGES,  PENALTIES,
JUDGMENTS,  COSTS,  AND EXPENSES  (INCLUDING  ATTORNEYS' FEES) ARISING OUT OF OR
RESULTING FROM THE SOLE OR CONTRIBUTORY NEGLIGENCE OF THE PERSON OR ENTITY TO BE
INDEMNIFIED,  but no such  indemnitee  shall be  indemnified  for its own  gross
negligence or willful misconduct.

         Section 7.2. No Waiver;  Cumulative Remedies. No failure on the part of
Secured Party to exercise and no delay in  exercising,  and no course of dealing
with respect to, any right,  power,  or  privilege  under this  Agreement  shall
operate as a waiver  thereof,  nor shall any single or partial  exercise  of any
right,  power, or privilege  under this Agreement  preclude any other or further
exercise  thereof or the exercise of any other right,  power, or privilege.  The
rights and  remedies  provided  for in this  Agreement  are  cumulative  and not
exclusive of any rights and remedies provided by law.

         Section 7.3.  Successors and Assigns.  This Agreement  shall be binding
upon and inure to the benefit of Debtor and Secured  Party and their  respective
heirs, successors, and assigns,

                                      -12-







except  that Debtor may not assign any of its rights or  obligations  under this
Agreement without the prior written consent of Secured Party.

         Section 7.4. AMENDMENT;  ENTIRE AGREEMENT.  THIS AGREEMENT EMBODIES THE
FINAL,  ENTIRE  AGREEMENT  AMONG THE PARTIES  HERETO AND  SUPERSEDES ANY AND ALL
PRIOR COMMITMENTS,  AGREEMENTS,  REPRESENTATIONS,  AND  UNDERSTANDINGS,  WHETHER
WRITTEN  OR  ORAL,  RELATING  TO  THE  SUBJECT  MATTER  HEREOF  AND  MAY  NOT BE
CONTRADICTED OR VARIED BY EVIDENCE OF PRIOR,  CONTEMPORANEOUS OR SUBSEQUENT ORAL
AGREEMENTS OR DISCUSSIONS OF THE PARTIES  HERETO.  THERE ARE NO ORAL  AGREEMENTS
AMONG THE PARTIES  HERETO.  The  provisions of this  Agreement may be amended or
waived only by an instrument in writing signed by the parties hereto.

         Section 7.5. Notices. All notices and other communications provided for
in this  Agreement  shall be given or made in  accordance  with the terms of the
Loan Agreement.

         Section 7.6. APPLICABLE LAW; VENUE; SERVICE OF PROCESS.  THIS AGREEMENT
SHALL BE GOVERNED BY AND CONSTRUED IN  ACCORDANCE  WITH THE LAWS OF THE STATE OF
TEXAS AND THE  APPLICABLE  LAWS OF THE UNITED STATES OF AMERICA.  THIS AGREEMENT
HAS BEEN ENTERED INTO IN HARRIS COUNTY,  TEXAS,  AND IT SHALL BE PERFORMABLE FOR
ALL PURPOSES IN HARRIS COUNTY, TEXAS.

         Section 7.7. Headings. The headings, captions, and arrangements used in
this   Agree-  ment  are  for   convenience   only  and  shall  not  affect  the
interpretation of this Agreement.

         Section  7.8.   Survival  of   Representations   and  Warranties.   All
representations  and  warranties  made in this  Agreement or in any  certificate
delivered  pursuant  hereto  shall  survive the  execution  and delivery of this
Agreement,   and  no   investigation   by  Secured   Party   shall   affect  the
representations and warranties or the right of Secured Party to rely upon them.

         Section 7.9. Counterparts. This Agreement may be executed in any number
of counter- parts,  each of which shall be deemed an original,  but all of which
together shall constitute one and the same instrument.

         Section 7.10.  Waiver of Bond. In the event Secured Party seeks to take
possession of any or all of the  Collateral by judicial  process,  Debtor hereby
irrevocably  waives any bonds and any surety or security  relating  thereto that
may be required by applicable law as an incident to such possession,  and waives
any demand for possession prior to the commencement of any such suit or action.

         Section 7.11.  Severability.  Any provision of this Agreement  which is
prohibited or unenforceable in any jurisdiction  shall, as to such jurisdiction,
be ineffective to the extent of such  prohibition  or  unenforceability  without
invalidating the remaining provisions of this Agree-

                                      -13-







ment, and any such prohibition or unenforceability in any jurisdiction shall not
invalidate or render unenforceable such provision in any other jurisdiction.

         Section 7.12.  Construction.  Debtor and Secured Party acknowledge that
each of them has had the benefit of legal counsel of its own choice and has been
afforded an opportunity to review this Agreement with its legal counsel and that
this  Agreement  shall be construed as if jointly  drafted by Debtor and Secured
Party.

         Section 7.13.  Obligations  Absolute.  The  obligations of Debtor under
this Agreement  shall be absolute and  unconditional  and shall not be released,
discharged,  reduced,  or in any way  impaired by any  circumstance  whatsoever,
including,  without  limitation,  any  amendment,  modification,  extension,  or
renewal of this  Agreement,  the  Obligations,  or any  document  or  instrument
evidencing,  securing, or otherwise relating to the Obligations,  or any release
or subordination of collateral, or any waiver, consent,  extension,  indulgence,
compromise,  settlement,  or  other  action  or  inaction  in  respect  of  this
Agreement, the Obligations, or any document or instrument evidencing,  securing,
or otherwise relating to the Obligations, or any exercise or failure to exercise
any right, remedy, power, or privilege in respect of the Obligations.

         IN  WITNESS  WHEREOF,  the  parties  hereto  have  duly  executed  this
Agreement as of the day and year first written above.

DEBTOR                                      SECURED PARTY:

PARAGON GEOPHYSICAL, INC.                   FIRST INTERSTATE BANK OF TEXAS, N.A.



By:______________________                   By:_________________________________
   J.D. White                                  Randy Wade
   Treasurer                                   Banking Officer

Address for Notices:                        Address for Notices:
7076 S. Alton Way                           1000 Louisiana
Englewood, Colorado  80112                  Houston, Texas  77002
Fax No.:  (303) 290-0447                    Fax No.:  (713) 250-7031
Telephone No.:  (303) 744-3700              Telephone No.:  (713) 250-7240
Attention:  President                       Attention:  Mr. Marc A. Dunmire



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