EAGLE GEOPHYSICAL INC
10-Q, 1999-05-14
OIL & GAS FIELD EXPLORATION SERVICES
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<PAGE>   1
 
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                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
 
                                   FORM 10-Q
(MARK ONE)
 
      [X]       QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
 
                 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1999
 
                                       OR
 
      [ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
 
                  FOR THE TRANSITION PERIOD FROM           TO
 
                        COMMISSION FILE NUMBER: 0-22863
 
                            EAGLE GEOPHYSICAL, INC.
             (Exact name of registrant as specified in its charter)
 
<TABLE>
<S>                                            <C>
                   DELAWARE                                      76-0522659
       (State or other jurisdiction of                        (I.R.S. Employer
        incorporation or organization)                      Identification No.)
 
                 2603 AUGUSTA                                      77057
                  SUITE 1400                                     (Zip Code)
                HOUSTON, TEXAS
            (Address of Principal
              Executive offices)
</TABLE>
 
       Registrant's telephone number, including area code: (713) 243-6100
 
     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 14 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  Yes [X]  No [ ]
 
     The number of shares outstanding of the issuer's common stock, as of May
14, 1999: 8,788,310
 
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- --------------------------------------------------------------------------------
<PAGE>   2
 
                            EAGLE GEOPHYSICAL, INC.
 
                               INDEX TO FORM 10-Q
                 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1999
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
PART I -- Financial Information.............................    3
  Item 1. Financial Statements..............................    3
     Consolidated Balance Sheets -- December 31, 1998 and
      March 31, 1999 (unaudited)............................    3
     Consolidated Statements of Operations for the three
      month periods ended March 31, 1998 and 1999
      (unaudited)...........................................    4
     Consolidated Statements of Cash Flows for the three
      month periods ended March 31, 1998 and 1999
      (unaudited)...........................................    5
     Consolidated Statement of Stockholders' Equity.........    6
     Notes to Unaudited Condensed Consolidated Financial
      Statements............................................    7
  Item 2. Management's Discussion and Analysis of Financial
     Condition and Results of Operations....................   16
  Item 3. Quantitative and Qualitative Disclosures About
     Market Risk............................................   20
PART II -- Other Information
  Item 6. Exhibits and Reports on Form 8-K..................   21
</TABLE>
 
                                        2
<PAGE>   3
 
                        PART I -- FINANCIAL INFORMATION
 
ITEM 1 -- FINANCIAL STATEMENTS
 
                            EAGLE GEOPHYSICAL, INC.
 
                          CONSOLIDATED BALANCE SHEETS
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31,    MARCH 31,
                                                                  1998          1999
                                                              ------------   -----------
                                                                             (UNAUDITED)
<S>                                                           <C>            <C>
CURRENT ASSETS:
  Cash and cash equivalents.................................    $ 10,331      $  6,738
  Restricted Cash...........................................       5,000         5,000
  Receivables:
    Trade, billed...........................................       4,029         8,105
    Cost and estimated earnings in excess of billings on
     uncompleted contracts..................................       7,075           368
    Other...................................................       1,076         1,552
  Due from affiliate........................................      25,756        26,900
  Inventory.................................................       2,230         2,646
  Prepaid expenses and other assets.........................       3,370         3,143
                                                                --------      --------
         Total current assets...............................      58,867        54,452
PROPERTY AND EQUIPMENT, AT COST:
  Vessels and geophysical equipment.........................     148,489       165,120
  Construction in Progress..................................      56,782        57,083
  Furniture, fixtures and other.............................       1,528         1,682
                                                                --------      --------
                                                                 206,799       223,885
Less: Accumulated depreciation..............................     (31,561)      (37,907)
                                                                --------      --------
         Net property and equipment.........................     175,238       185,978
MULTI-CLIENT DATA LIBRARY...................................      15,910        18,624
GOODWILL, NET...............................................      19,176        18,825
OTHER LONG-TERM ASSETS......................................       4,004         4,041
                                                                --------      --------
         TOTAL ASSETS.......................................    $273,195      $281,920
                                                                ========      ========
 
                          LIABILITIES AND STOCKHOLDERS' EQUITY
 
CURRENT LIABILITIES:
  Current portion of long-term debt.........................    $  1,830      $ 15,437
  Current portion of capital lease obligations..............       6,063         6,167
  Accounts payable..........................................      17,073        25,226
  Accrued liabilities.......................................      24,459        13,987
  Billings in excess of costs and estimated earnings on
    uncompleted contracts...................................       3,367         6,398
                                                                --------      --------
         Total current liabilities..........................      52,792        67,215
LONG-TERM DEBT..............................................     105,385       104,918
CAPITAL LEASE OBLIGATIONS...................................      22,343        20,757
DEFERRED INCOME TAXES AND OTHER OBLIGATIONS.................       2,875         2,655
                                                                --------      --------
         TOTAL LIABILITIES..................................     183,395       195,545
                                                                --------      --------
CONTINGENCIES AND COMMITMENTS
STOCKHOLDERS' EQUITY:
  Preferred stock, 5,000,000 shares authorized, none issued
    and outstanding.........................................          --            --
  Common stock, par value $.01 per share; authorized
    25,000,000 shares; 8,788,310 shares issued and
    outstanding at December 31, 1998 and March 31, 1999
    (unaudited).............................................          88            88
  Additional paid-in capital................................      84,412        84,412
  Retained earnings.........................................       5,725         2,300
  Note receivable from Stockholder..........................        (425)         (425)
                                                                --------      --------
         TOTAL STOCKHOLDERS' EQUITY.........................      89,800        86,375
                                                                --------      --------
         TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY.........    $273,195      $281,920
                                                                ========      ========
</TABLE>
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                        3
<PAGE>   4
 
                            EAGLE GEOPHYSICAL, INC.
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                 THREE MONTH
                                                                PERIODS ENDED
                                                                  MARCH 31,
                                                              -----------------
                                                               1998      1999
                                                              -------   -------
<S>                                                           <C>       <C>
REVENUES(1).................................................  $23,880   $28,135
EXPENSES
  Operating expenses (exclusive of depreciation and
     amortization shown below)(1)...........................   17,439    20,808
  Depreciation and amortization.............................    2,888     6,697
  Selling, general and administrative expenses..............    2,496     2,466
  Interest expense..........................................      188     2,274
  Interest income...........................................     (221)      (78)
  Other, net................................................       46        (7)
                                                              -------   -------
                                                               22,836    32,160
                                                              -------   -------
Income (loss) before provision for income taxes.............    1,044    (4,025)
Provision (benefit) for income taxes........................      423      (600)
                                                              -------   -------
NET INCOME (LOSS)...........................................  $   621   $(3,425)
                                                              =======   =======
Basic earnings (loss) per share.............................  $   .07   $  (.39)
                                                              =======   =======
Weighted average number of common shares (basic)............    8,498     8,788
                                                              =======   =======
Diluted earnings (loss) per share...........................  $   .07   $  (.39)
                                                              =======   =======
Weighted average number of common shares (diluted)..........    8,499     8,788
                                                              =======   =======
</TABLE>
 
- ---------------
 
(1) Includes revenue from affiliates of $14,309 and $18,120 for the unaudited
    three month periods ended March 31, 1998 and 1999, respectively, and
    operating expenses related to such affiliate revenue of $12,204 and $15,181
    for the unaudited three month periods ended March 31, 1998 and 1999,
    respectively.
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                        4
<PAGE>   5
 
                            EAGLE GEOPHYSICAL, INC.
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                      (IN THOUSANDS, EXCEPT SHARE AMOUNTS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                              THREE MONTH PERIODS
                                                                ENDED MARCH 31,
                                                              -------------------
                                                                1998       1999
                                                              --------   --------
<S>                                                           <C>        <C>
Cash flows from operating activities:
  Net income (loss).........................................  $    621   $ (3,425)
  Adjustments to reconcile net income to net cash provided
     by operating activities:
     Depreciation and amortization..........................     2,888      6,697
     Deferred income tax provision (benefit)................        85       (120)
     Bad debt expense.......................................       150         --
     Increase in receivables................................      (821)    (5,220)
     Decrease in other assets...............................       623      6,005
     Increase in accounts payable and other liabilities.....     8,761        611
                                                              --------   --------
          Total adjustments.................................    11,686      7,973
                                                              --------   --------
          Net cash provided by operating activities.........    12,307      4,548
                                                              --------   --------
Cash flows from investing activities:
  Purchase of equipment and vessel upgrades.................   (21,578)   (17,086)
  Cash paid for multi-client data library...................    (4,194)    (2,713)
  Cash paid for shot-hole drilling company, net of cash
     acquired...............................................    (3,470)        --
  Cash deposited in connection with a capital lease.........      (498)        --
                                                              --------   --------
          Net cash used in investing activities.............   (29,740)   (19,799)
                                                              --------   --------
Cash flows from financing activities:
  Borrowings under credit facility..........................     7,000     18,099
  Repayments under credit facility..........................        --     (4,500)
  Principal payments on term loans..........................        --       (459)
  Principal payments on capital leases......................      (908)    (1,482)
                                                              --------   --------
          Net cash provided by financing activities.........     6,092     11,658
                                                              --------   --------
Net decrease in cash and cash equivalents...................   (11,341)    (3,593)
Cash and cash equivalents at beginning of period............    14,980     10,331
                                                              --------   --------
Cash and cash equivalents at end of period..................  $  3,639   $  6,738
                                                              ========   ========
Supplemental disclosures of cash flow information:
  Cash paid during the period for:
  Interest, net.............................................  $    194   $  4,820
                                                              ========   ========
  Income taxes..............................................  $    129   $     --
                                                              ========   ========
Noncash investing & financing activities:
  Purchase of shot-hole drilling company for 98,360 shares
     of common stock........................................  $  1,125   $     --
                                                              ========   ========
</TABLE>
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                        5
<PAGE>   6
 
                            EAGLE GEOPHYSICAL, INC.
 
                 CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                NOTE
                                    COMMON STOCK     ADDITIONAL              RECEIVABLE        TOTAL
                                   ---------------    PAID-IN     RETAINED      FROM       STOCKHOLDERS'
                                   SHARES   AMOUNT    CAPITAL     EARNINGS   STOCKHOLDER      EQUITY
                                   ------   ------   ----------   --------   -----------   -------------
<S>                                <C>      <C>      <C>          <C>        <C>           <C>
Balance, December 31, 1998.......  8,788     $88      $84,412     $ 5,725       $(425)        $89,800
  Unaudited:
     Net Loss....................     --      --           --      (3,425)         --          (3,425)
                                   -----     ---      -------     -------       -----         -------
Balance, March 31, 1999..........  8,788     $88      $84,412     $ 2,300       $(425)        $86,375
                                   =====     ===      =======     =======       =====         =======
</TABLE>
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                        6
<PAGE>   7
 
                            EAGLE GEOPHYSICAL, INC.
 
         NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                 MARCH 31, 1999
 
1. BASIS OF PRESENTATION AND SIGNIFICANT ACTIVITIES
 
     The accompanying unaudited interim condensed consolidated financial
statements of Eagle Geophysical, Inc. (the "Company") for the three months ended
March 31, 1998 and 1999 have been prepared without an audit pursuant to the
rules and regulations of the Securities and Exchange Commission. In the opinion
of management, all adjustments, which consist of normal recurring adjustments,
necessary to present fairly the financial position, results of operations, and
cash flows for all periods presented have been made. Operating results for the
interim period are not necessarily indicative of the results that can be
achieved for a full year. It is suggested that these interim condensed financial
statements be read in conjunction with the audited financial statements and the
notes thereto included in the Company's Annual Report on Form 10-K.
 
     In May 1999, the Company initiated discussions with a vessel owner for the
decommissioning and release of the charter for the seismic vessel Discoverer.
The vessel is currently working on a contract which the Company expects to be
completed in June 1999.
 
     In April 1999, in an effort to reduce costs and improve utilization of
existing owned vessels, the Company decommissioned the Celtic Horizon.
Negotiations are underway with the charter operator to terminate the current
lease commitment.
 
     In April 1999, the Company obtained a commitment from a financial
institution, subject to negotiation and execution of final documentation, for
the financing of the seismic recording system and streamers for the vessel
Atlantic Horizon. The financing will be an equipment term loan of approximately
$12.0 million payable over a term of seven years at an interest rate of
approximately 9.2% with monthly payments of principal and interest due of
approximately $150,000, with all remaining principal and interest due at the end
of the term. The loan will be secured by the recording system, streamers, and
the vessel Atlantic Horizon.
 
2. EARNINGS (LOSS) PER COMMON SHARE
 
     Net earnings (loss) per share of common stock has been computed on the
basis of the weighted average number of common shares outstanding during the
period and, where dilutive, the effect of common stock contingently issuable,
which arises primarily from the exercise of stock options, in accordance with
the provisions of Statement of Financial Accounting Standards ("SFAS"), No. 128
"Earnings Per Share". The weighted average shares of common stock outstanding
for the calculation of basic earnings per share was 8,498,000 and 8,788,000 for
the three month periods ending March 31, 1998 and 1999 respectively. The
weighted average shares of common stock outstanding for the calculation of
diluted earnings per share was 8,499,000 for the three months ended March 31,
1998. Diluted earnings per share for the three months ended March 31, 1999 is
equal to basic earnings per share due to the antidilutive effect of stock
options for the period.
 
                                        7
<PAGE>   8
                            EAGLE GEOPHYSICAL, INC.
 
                   NOTES TO UNAUDITED CONDENSED CONSOLIDATED
                      FINANCIAL STATEMENTS -- (CONTINUED)
 
3. DEBT
 
     The Company had the following debt outstanding as of December 31, 1998 and
March 31, 1999 (in thousands):
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31,    MARCH 31,
                                                                  1998          1999
                                                              ------------   -----------
                                                                             (UNAUDITED)
<S>                                                           <C>            <C>
Borrowings pursuant to a revolving credit facility with
  Wells Fargo Business Credit, Inc.........................     $     --      $ 13,599
Fleet Capital Term Loan....................................        5,286         5,031
Other Term Loans...........................................        1,929         1,725
10 3/4% Senior Notes Due 2008..............................      100,000       100,000
                                                                --------      --------
                                                                 107,215       120,355
Less amounts due within one year...........................       (1,830)      (15,437)
                                                                --------      --------
Total long-term debt.......................................     $105,385      $104,918
                                                                ========      ========
</TABLE>
 
     On March 26, 1999, the Company executed an agreement with Wells Fargo
Business Credit, Inc. (formerly Norwest Business Credit, Inc.), for a $20.0
million revolving credit facility secured by the Company's accounts receivable,
inventory, and certain equipment (the "Wells Fargo Credit Facility"). The amount
the Company may borrow is limited to a borrowing base that is equal to 85% of
eligible U.S. accounts receivable. Interest accrues under the facility at the
bank's base rate plus .375% or at LIBOR plus .275%. Interest only is payable
monthly or at the end of applicable LIBOR interest periods. If all borrowings
under the facility are not repaid annually, then an additional fee of .5% of the
average borrowings outstanding is payable. On March 26, 1999, the Company
borrowed $14.0 million from Wells Fargo and repaid $14.0 million of borrowings
under a revolving credit facility with Bank One Texas, N.A. and terminated the
agreement related to the Bank One credit facility. The Wells Fargo Credit
Facility matures on March 26, 2002, at which time all amounts borrowed under
this facility are due and payable. However, because the Wells Fargo Credit
Facility requires that all collections of the Company's accounts receivable be
paid to a lockbox controlled by Wells Fargo, all borrowings under this facility
are classified as current liabilities for accounting purposes. As of March 31,
1999 and May 10, 1999, the Company had borrowings outstanding of $13.6 million
and $13.9 million, respectively, and had $6.4 million and $6.1 million,
respectively, of borrowing availability remaining under the Wells Fargo Credit
Facility.
 
     The Wells Fargo Credit Facility includes financial covenants effective
beginning March 26, 1999, which will require a level of operating performance to
be achieved by the Company. Management believes the Company can comply with the
financial covenants during 1999, however, no assurance of compliance can be
provided.
 
     In connection with the acquisition of NRG Services, Inc. in November 1998,
the Company assumed approximately $2.0 million of term loans payable. The notes
have monthly payments ranging from approximately $5,300 to $26,000, interest
rates ranging from 5.75% to 9.7%, and maturities ranging from April 2000 to
August 2002.
 
     In July 1998, the Company completed an offering of $100 million of 10 3/4%
Senior Notes due 2008 resulting in net proceeds to the Company of approximately
$96.4 million after deducting offering-related expenses (the "Offering"). The
Company used the proceeds to fund upgrades on two seismic vessels, the Austral
Horizon and the Atlantic Horizon.
 
     In April 1998, the Company obtained a term loan with Fleet Capital
Corporation for the financing of an Opseis system for approximately $5.9
million. The loan is for a period of five years and bears interest at a fixed
 
                                        8
<PAGE>   9
                            EAGLE GEOPHYSICAL, INC.
 
                   NOTES TO UNAUDITED CONDENSED CONSOLIDATED
                      FINANCIAL STATEMENTS -- (CONTINUED)
 
rate of 7.36%. Monthly payments of approximately $117,000 are payable under the
loan with the Opseis system pledged as security for the loan.
 
4. COMMITMENTS AND CONTINGENCIES
 
     The Company is involved in or threatened with various legal proceedings
from time to time arising in the normal course of business. Management of the
Company does not believe that any liabilities resulting from such proceedings
will have a material adverse effect on its operations or financial position.
 
     The Company generally provides services to a relatively small number of
customers, so that individual customers account for significant portions of the
Company's accounts receivable at any given time. Credit losses incurred on
receivables have historically been immaterial to the Company. The Company
currently has one receivable from a customer of $2,384,000 that is approximately
twenty-four months old. Management currently believes that this receivable is
collectible, although in light of the age of this receivable, the Company
previously provided a valuation reserve of $1,884,000 and has classified the net
receivable as a long-term asset as of December 31, 1998 and March 31, 1999.
 
5. RELATED PARTY TRANSACTIONS
 
     Prior to the Company's initial public offering in August 1997, the Company
was a wholly-owned subsidiary of Seitel, Inc. Seitel currently owns
approximately 17.3% of the outstanding common stock of the Company. Seitel has
declared a dividend of the shares it owns of the Company to Seitel shareholders.
Upon payment of this dividend, Seitel will no longer have an ownership interest
in the Company.
 
     The Company enters into various types of transactions with Seitel and its
subsidiaries. The Company performs seismic data acquisition services for
Seitel's seismic data library subsidiary and its exploration and production
subsidiary. For the unaudited three month periods ended March 31, 1998 and 1999,
the Company recognized revenue of $14,309,000 and $18,120,000, respectively, for
seismic data acquisition services performed for Seitel's subsidiaries.
 
6. OPERATING SEGMENT DISCLOSURES
 
     The following is a summary of business segment information prepared in
accordance with the requirements of SFAS No. 131 "Disclosure about Segments of
an Enterprise and Related Information" for the three months ended March 31, 1998
and 1999. Management of the Company reviews the financial information primarily
by its two seismic operating segments, onshore seismic data acquisition and
offshore seismic data acquisition.
 
<TABLE>
<CAPTION>
                                                         ONSHORE      OFFSHORE    CORPORATE
                                                        OPERATIONS   OPERATIONS    OFFICE      TOTAL
                    MARCH 31, 1998                      ----------   ----------   ---------   -------
<S>                                                     <C>          <C>          <C>         <C>
Operating Revenues....................................    17,835        6,045          --      23,880
Operating Income......................................     4,114        1,087      (1,256)      3,945
Identifiable Assets...................................    46,566       90,700       6,661     143,927
MARCH 31, 1999
Operating Revenues....................................    16,072       12,063          --      28,135
Operating Income......................................     5,173          349        (661)      4,861
Identifiable Assets...................................    57,785      211,235      12,900     281,920
</TABLE>
 
                                        9
<PAGE>   10
                            EAGLE GEOPHYSICAL, INC.
 
                   NOTES TO UNAUDITED CONDENSED CONSOLIDATED
                      FINANCIAL STATEMENTS -- (CONTINUED)
 
7. SUPPLEMENTAL GUARANTOR CONDENSED CONSOLIDATING FINANCIAL STATEMENTS
 
     On July 20, 1998, the Company completed the offering of its $100 million
10 3/4% Senior Notes due 2008 to pay for upgrades on two seismic vessels, the
Austral Horizon and Atlantic Horizon. In connection with the Offering, certain
of the Company's wholly-owned subsidiaries (the "Guarantor Subsidiaries") agreed
to fully and unconditionally guarantee the Company's obligations under the
Senior Notes. Certain other subsidiaries (the "Non-Guarantor Subsidiaries") are
not required to guarantee the Senior Notes. There are no restrictions on the
Company's ability to obtain dividends or other distribution of funds from the
Guarantor Subsidiaries, except those imposed by applicable law.
 
     The following tables present the condensed consolidating balance sheets of
Eagle Geophysical, Inc. as a parent company, its Guarantor Subsidiaries and its
Non-Guarantor Subsidiaries as of December 31, 1998 and March 31, 1999
(unaudited) and the related condensed consolidating statements of operations and
cash flows for the three months ended March 31, 1998 and 1999 (unaudited). The
Company has not presented separate financial statements and other disclosure
concerning each of the Guarantor Subsidiaries because management has determined
that such information is not material to investors.
 
                                       10
<PAGE>   11
 
                    EAGLE GEOPHYSICAL, INC. AND SUBSIDIARIES
 
              CONDENSED CONSOLIDATING GUARANTOR, NON-GUARANTOR AND
                          PARENT COMPANY BALANCE SHEET
                               DECEMBER 31, 1998
                                 (IN THOUSANDS)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                               EAGLE                                                                  EAGLE
                                           GEOPHYSICAL,                                                           GEOPHYSICAL,
                                               INC.                             NON-        RECLASSIFICATIONS         INC.
                                              PARENT          GUARANTOR       GUARANTOR            AND                 AND
                                              COMPANY        SUBSIDIARIES   SUBSIDIARIES      ELIMINATIONS        SUBSIDIARIES
                                         -----------------   ------------   -------------   -----------------   -----------------
<S>                                      <C>                 <C>            <C>             <C>                 <C>
Current assets:
  Cash and cash equivalents............      $     352         $  7,597        $ 3,547          $ (1,165)           $ 10,331
  Restricted cash......................             --               --          5,000                --               5,000
  Receivables, net.....................             --           35,462          2,474                --              37,936
  Inventory............................             --               --          2,230                --               2,230
  Prepaid expenses and other assets....             50            1,354          1,966                --               3,370
                                             ---------         --------        -------          --------            --------
          Total Current Assets.........            402           44,413         15,217            (1,165)             58,867
  Property and equipment, net..........             --          129,041         46,197                --             175,238
  Goodwill, net........................             --            2,359         16,817                --              19,176
  Other assets, net....................          3,477           14,465          1,972                --              19,914
  Intercompany investments and
     advances..........................         19,152               --             --           (19,152)                 --
                                             ---------         --------        -------          --------            --------
          Total Assets.................      $  23,031         $190,278        $80,203          $(20,317)           $273,195
                                             =========         ========        =======          ========            ========
 
                                              LIABILITIES AND STOCKHOLDERS' EQUITY
 
Current portion of debt and capital
  lease obligations....................      $      --         $  1,830        $ 6,063          $     --            $  7,893
Accounts payable.......................             --           13,193          5,045            (1,165)             17,073
Intercompany payables, net.............       (157,828)         149,091         25,418           (16,681)                 --
Accrued liabilities....................            632            4,895         18,932                --              24,459
Billings in excess of costs and
  estimated earnings on uncompleted
  contracts............................             --            3,367             --                --               3,367
                                             ---------         --------        -------          --------            --------
          Total Current Liabilities....       (157,196)         172,376         55,458           (17,846)             52,792
Long-term debt.........................        100,000            5,385             --                --             105,385
Capital leases obligations.............             --               --         22,343                --              22,343
Deferred income taxes and other
  obligations..........................          1,353            1,522             --                --               2,875
                                             ---------         --------        -------          --------            --------
          Total Liabilities............        (55,843)         179,283         77,801           (17,846)            183,395
                                             ---------         --------        -------          --------            --------
Stockholders' Equity...................         78,874           10,995          2,402            (2,471)             89,800
                                             ---------         --------        -------          --------            --------
          Total Liabilities and
            Stockholders' Equity.......      $  23,031         $190,278        $80,203          $(20,317)           $273,195
                                             =========         ========        =======          ========            ========
</TABLE>
 
                                       11
<PAGE>   12
 
                    EAGLE GEOPHYSICAL, INC. AND SUBSIDIARIES
 
              CONDENSED CONSOLIDATING GUARANTOR, NON-GUARANTOR AND
                          PARENT COMPANY BALANCE SHEET
                                 MARCH 31, 1999
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                               EAGLE                                        RECLASSIFICATIONS         EAGLE
                                         GEOPHYSICAL, INC.    GUARANTOR     NON-GUARANTOR          AND          GEOPHYSICAL, INC.
                                          PARENT COMPANY     SUBSIDIARIES   SUBSIDIARIES      ELIMINATIONS      AND SUBSIDIARIES
                                         -----------------   ------------   -------------   -----------------   -----------------
<S>                                      <C>                 <C>            <C>             <C>                 <C>
Current assets:
  Cash and cash equivalents.............     $   1,528         $  3,978        $ 1,232          $     --            $  6,738
  Restricted cash.......................            --               --          5,000                --               5,000
  Receivables, net......................            --           33,000          3,557                --              36,557
  Inventory.............................            --               --          2,646                --               2,646
  Prepaid expenses and other assets.....           690              663          2,158                --               3,511
                                             ---------         --------        -------          --------            --------
          Total Current Assets..........         2,218           37,641         14,593                --              54,452
  Property and equipment, net...........            --          128,248         57,730                --             185,978
  Goodwill, net.........................            --            2,373         16,452                --              18,825
  Other assets, net.....................         3,517           19,148             --                --              22,665
  Intercompany investments and
     advances...........................        19,152               --             --           (19,152)                 --
                                             ---------         --------        -------          --------            --------
          Total Assets..................     $  24,887         $187,410        $88,775          $(19,152)           $281,920
                                             =========         ========        =======          ========            ========
 
                                              LIABILITIES AND STOCKHOLDERS' EQUITY
 
Current portion of debt and capital
  lease obligations.....................     $  13,599         $  1,838        $ 6,167          $     --            $ 21,604
Accounts payable........................            --            9,626         15,600                --              25,226
Intercompany payables, net..............      (169,564)         150,228         36,017           (16,681)                 --
Accrued liabilities.....................         1,670            2,264         10,053                --              13,987
Billings in excess of costs and
  estimated earnings on uncompleted
  contracts.............................            --            6,398             --                --               6,398
                                             ---------         --------        -------          --------            --------
          Total Current Liabilities.....      (154,295)         170,354         67,837           (16,681)             67,215
Long-Term Debt..........................       100,000            4,918             --                --             104,918
Capital leases obligations..............            --               --         20,757                --              20,757
Deferred income taxes and other
  obligations...........................         1,330            1,325             --                --               2,655
                                             ---------         --------        -------          --------            --------
          Total Liabilities.............       (52,965)         176,597         88,594           (16,681)            195,545
                                             ---------         --------        -------          --------            --------
Stockholders' Equity....................        77,852           10,813            181            (2,471)             86,375
                                             ---------         --------        -------          --------            --------
          Total Liabilities and
            Stockholders' Equity........     $  24,887         $187,410        $88,775          $(19,152)           $281,920
                                             =========         ========        =======          ========            ========
</TABLE>
 
                                       12
<PAGE>   13
 
                    EAGLE GEOPHYSICAL, INC. AND SUBSIDIARIES
 
              CONDENSED CONSOLIDATING GUARANTOR, NON-GUARANTOR AND
                     PARENT COMPANY STATEMENT OF OPERATIONS
               FOR THE THREE MONTHS ENDED MARCH 31, 1998 AND 1999
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                              EAGLE                                        RECLASSIFICATIONS          EAGLE
                                        GEOPHYSICAL, INC.    GUARANTOR     NON-GUARANTOR          AND           GEOPHYSICAL, INC.
                                         PARENT COMPANY     SUBSIDIARIES   SUBSIDIARIES       ELIMINATIONS      AND SUBSIDIARIES
                                        -----------------   ------------   -------------   ------------------   -----------------
<S>                                     <C>                 <C>            <C>             <C>                  <C>
1998
REVENUES..............................       $    --          $19,150         $ 5,177            $(447)              $23,880
EXPENSES
  Operations Expenses (exclusive of
     Depreciation and amortization
     shown below).....................            --           14,262           3,624             (447)               17,439
  Depreciation and amortization.......             9            1,909             970               --                 2,888
  Selling, general and administrative
     expenses.........................         1,256              425             815               --                 2,496
  Interest and other expense, net.....           (60)             (19)             92               --                    13
                                             -------          -------         -------            -----               -------
                                               1,205           16,577           5,501             (447)               22,836
                                             -------          -------         -------            -----               -------
Income (loss) before provision for
  income taxes........................        (1,205)           2,573            (324)              --                 1,044
Provision (benefit) for income
  taxes...............................          (452)             880              (5)              --                   423
                                             -------          -------         -------            -----               -------
NET INCOME (LOSS).....................       $  (753)         $ 1,693         $  (319)           $  --               $   621
                                             =======          =======         =======            =====               =======
1999
REVENUES..............................       $    --          $24,367         $ 4,216            $(448)              $28,135
EXPENSES
  Operations Expenses (exclusive of
     Depreciation and amortization
     shown below).....................            --           18,739           2,517             (448)               20,808
  Depreciation and amortization.......            --            4,083           2,614               --                 6,697
  Selling, general and administrative
     expenses.........................            --            1,424           1,042               --                 2,466
  Interest and other expense, net.....         1,635              155             399               --                 2,189
                                             -------          -------         -------            -----               -------
                                               1,635           24,401           6,572             (448)               32,160
                                             -------          -------         -------            -----               -------
Income (loss) before provision for
  income taxes........................        (1,635)             (34)         (2,356)              --                (4,025)
Provision (benefit) for income
  taxes...............................          (613)             148            (135)              --                  (600)
                                             -------          -------         -------            -----               -------
NET INCOME (LOSS).....................       $(1,022)         $  (182)        $(2,221)           $  --               $(3,425)
                                             =======          =======         =======            =====               =======
</TABLE>
 
                                       13
<PAGE>   14
 
                    EAGLE GEOPHYSICAL, INC. AND SUBSIDIARIES
 
              CONDENSED CONSOLIDATING GUARANTOR, NON-GUARANTOR AND
                     PARENT COMPANY STATEMENT OF CASH FLOWS
                   FOR THE THREE MONTHS ENDED MARCH 31, 1998
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                               EAGLE                                        RECLASSIFICATIONS         EAGLE
                                         GEOPHYSICAL, INC.    GUARANTOR     NON-GUARANTOR          AND          GEOPHYSICAL, INC.
                                          PARENT COMPANY     SUBSIDIARIES   SUBSIDIARIES      ELIMINATIONS      AND SUBSIDIARIES
                                         -----------------   ------------   -------------   -----------------   -----------------
<S>                                      <C>                 <C>            <C>             <C>                 <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss)....................       $  (753)         $ 1,693        $   (319)          $    --            $    621
  Adjustments to reconcile net income
     (loss) to net cash provided by
     operating activities..............        (1,335)           9,862           5,542            (2,383)             11,686
                                              -------          -------        --------           -------            --------
NET CASH PROVIDED BY (USED IN)
  OPERATING ACTIVITIES.................        (2,088)          11,555           5,223            (2,383)             12,307
                                              -------          -------        --------           -------            --------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchase and upgrades of property and
     equipment.........................           (81)          (1,417)        (20,080)               --             (21,578)
  Cash paid for multi-client data
     library...........................            --           (4,194)             --                --              (4,194)
  Cash paid for shot-hole drilling
     company, net of cash acquired.....            --           (3,470)             --                --              (3,470)
  Cash deposited in connection with a
     capital lease.....................            --               --            (498)               --                (498)
                                              -------          -------        --------           -------            --------
NET CASH USED IN INVESTING
  ACTIVITIES...........................           (81)          (9,081)        (20,578)               --             (29,740)
                                              -------          -------        --------           -------            --------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Borrowings under credit facility.....         7,000               --              --                --               7,000
  Principal payments on capital
     leases............................            --               --            (728)               --                (728)
  Proceeds (payments) on intercompany
     advances..........................        (7,348)          (4,144)         11,492                --                  --
  Other, net...........................          (180)              --              --                --                (180)
                                              -------          -------        --------           -------            --------
NET CASH PROVIDED BY (USED IN)
  FINANCING ACTIVITIES.................          (528)          (4,144)         10,764                --               6,092
                                              -------          -------        --------           -------            --------
  Net decrease in cash and cash
     equivalents.......................        (2,697)          (1,670)         (4,591)           (2,383)            (11,341)
  Cash and cash equivalents, beginning
     of period.........................         8,450            1,670           4,860                --              14,980
                                              -------          -------        --------           -------            --------
CASH AND CASH EQUIVALENTS, END OF
  PERIOD...............................       $ 5,753          $    --        $    269           $(2,383)           $  3,639
                                              =======          =======        ========           =======            ========
</TABLE>
 
                                       14
<PAGE>   15
 
                    EAGLE GEOPHYSICAL, INC. AND SUBSIDIARIES
 
              CONDENSED CONSOLIDATING GUARANTOR, NON-GUARANTOR AND
                     PARENT COMPANY STATEMENT OF CASH FLOWS
                   FOR THE THREE MONTHS ENDED MARCH 31, 1999
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                              EAGLE                                         RECLASSIFICATIONS         EAGLE
                                        GEOPHYSICAL, INC.     GUARANTOR     NON-GUARANTOR          AND          GEOPHYSICAL, INC.
                                         PARENT COMPANY     SUBSIDIARIES    SUBSIDIARIES      ELIMINATIONS      AND SUBSIDIARIES
                                        -----------------   -------------   -------------   -----------------   -----------------
<S>                                     <C>                 <C>             <C>             <C>                 <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss)...................      $ (1,022)          $  (182)       $ (2,221)          $    --            $ (3,425)
  Adjustments to reconcile net income
     (loss) to net cash provided by
     operating activities.............           335             1,844           4,629             1,165               7,973
                                            --------           -------        --------           -------            --------
NET CASH PROVIDED BY (USED IN)
  OPERATING ACTIVITIES................          (687)            1,662           2,408             1,165               4,548
                                            --------           -------        --------           -------            --------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchase and upgrades of property
     and equipment....................            --            (3,246)        (13,840)               --             (17,086)
  Cash paid for multi-client data
     library..........................            --            (2,713)             --                --              (2,713)
                                            --------           -------        --------           -------            --------
NET CASH USED IN INVESTING
  ACTIVITIES..........................            --            (5,959)        (13,840)               --             (19,799)
                                            --------           -------        --------           -------            --------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Borrowings under credit facility....        18,099                --              --                --              18,099
  Repayments under credit facility....        (4,500)               --              --                --              (4,500)
  Principal payments on term loans....            --              (459)             --                --                (459)
  Principal payments on capital
     leases...........................            --                --          (1,482)               --              (1,482)
  Proceeds (payments) on intercompany
     advances.........................       (11,736)            1,137          10,599                --                  --
                                            --------           -------        --------           -------            --------
NET CASH PROVIDED BY FINANCING
  ACTIVITIES..........................         1,863               678           9,117                --              11,658
                                            --------           -------        --------           -------            --------
  Net increase (decrease) in cash and
     cash equivalents.................         1,176            (3,619)         (2,315)            1,165              (3,593)
  Cash and cash equivalents, beginning
     of period........................           352             7,597           3,547            (1,165)             10,331
                                            --------           -------        --------           -------            --------
CASH AND CASH EQUIVALENTS, END OF
  PERIOD..............................      $  1,528           $ 3,978        $  1,232           $    --            $  6,738
                                            ========           =======        ========           =======            ========
</TABLE>
 
                                       15
<PAGE>   16
 
ITEM 2 -- MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
RESULTS OF OPERATIONS
 
GENERAL
 
     The Company's revenues are generated from the sale of onshore and offshore
seismic data acquisition services and, commencing in March 1998, the sale of
seismic shot-hole drilling and front-end services. The Company focuses its
onshore operations and front end services in logistically difficult wetland
environments along the U.S. Gulf Coast and commencing in the second quarter of
1999, in Argentina. The Company focuses its offshore operations in congested
areas in the U.S. Gulf of Mexico, the Atlantic Coast of South America, and the
North Sea. Onshore operations including front-end services accounted for
approximately 75% and 57% of the Company's consolidated revenues for the three
months ended March 31, 1998 and 1999, respectively, with offshore operations
accounting for the remaining 25% and 43% of consolidated revenues for the three
months ended March 31, 1998 and 1999, respectively.
 
     The Company generally provides its onshore seismic data acquisition
services under fixed fee contracts with its customers. The Company provides its
offshore seismic data acquisition services under either distance-or time-based
contracts (or a combination of both methods) or turnkey contracts that provide
for a fixed fee. The Company generally does not retain rights to the data
acquired. However, the Company anticipates that an increasing percentage of its
future offshore data acquisition projects will be multi-client surveys.
 
     In a multi-client survey, the Company retains an interest in the acquired
data. Conducting multi-client surveys normally has little effect on operating
margins in the short term because the Company will capitalize most of the costs
relating to the acquisition of the multi-client data that are not offset by
pre-funding. However, since revenues from multi-client projects only include
pre-funding amounts during the acquisition of the data, and these pre-funding
amounts are normally less than revenues for proprietary data acquisition
projects, total revenues and net income tend to be less during multi-client
acquisition projects than during proprietary acquisition projects. If the
Company is able to make sales of the multi-client data after full amortization
of the acquisition cost of the data (up to four years), the additional sales
will result in revenues with little or no cost, increasing net income.
Conversely, if the sales of the multi-client data are less than originally
projected by management, the asset value of the data will be adjusted to equal
the estimated net realizable value of the data (total estimated future sales
less selling expenses), resulting in decreased net income.
 
     Because the Company derives a portion of its offshore revenues from sales
internationally, the Company is subject to risks relating to fluctuations in
currency exchange rates. The Company's costs and revenues from offshore
operations have historically been evenly divided between the U.S. dollar and the
British pound. The Company's financial statements are prepared using the U.S.
dollar as the functional currency, and, therefore, fluctuations in the exchange
rate between the U.S. dollar and the British pound affect the Company's costs
and revenues. Historically, fluctuations in exchange rates have not had a
material impact on the Company's results of operations, and the Company does not
currently engage in any currency hedging activities. As the Company expands its
operations into new geographic markets, such as Canada and Latin America, which
may involve more extensive currency risks, the Company intends to protect itself
against foreign currency fluctuations by generally attempting to match foreign
currency revenues and expenses in order to balance its net position of
receivables and payables denominated in foreign currencies, by endeavoring to
require its customers to pay for services in U.S. dollars and, to a lesser
extent, by purchasing foreign exchange contracts and other foreign exchange
instruments to counteract currency fluctuations. The Company did not have any
open derivative contracts related to foreign currency at March 31, 1999.
 
     The Company generally provides services to a relatively small group of key
customers that account for a significant percentage of the accounts receivable
of the Company at any given time. The Company's key customers vary over time,
but have historically included Seitel and its subsidiaries. The Company extends
credit to various companies in the oil and gas industry, including its key
customers, for the acquisition of seismic data, which results in a concentration
of credit risk. This concentration of credit risk may be affected by changes in
the economic or other conditions of the Company's key clients and may
accordingly impact the Company's overall credit risk. As of March 31, 1999, the
Company had one receivable from a customer of approximately $2.4 million that is
approximately 24 months old. In light of the age of this receivable, the
 
                                       16
<PAGE>   17
 
Company previously provided a valuation reserve for this receivable of $1.9
million and has classified this receivable as a long-term asset. Historical
credit losses incurred on receivables by the Company have been immaterial.
 
RESULTS OF OPERATIONS
 
     The current state of the oil and gas services industry in which the Company
operates has been adversely impacted by sustained declines in oil and natural
gas commodity prices which first appeared in the second quarter of 1998 and have
continued through the first quarter of 1999, when commodity prices began to show
signs of a recovery. These price declines have adversely impacted the cash flows
of major and independent oil and gas companies and seismic data library
companies, which comprise the Company's customer base. The Company's customers
have reacted to this environment by reducing capital spending on oil and gas
exploration projects and purchases of seismic data. The Company was first
impacted by these industry factors in the fourth quarter of 1998 when several
projects experienced delays as customers chose to delay commencement of
previously committed projects. The Company continued to be affected by these
industry factors in the first quarter of 1999 with fewer new projects commencing
and with delays on existing projects. Prices in all segments remain under
pressure as the impact of improving commodity prices has not yet significantly
increased seismic spending in the oil and gas industry. The comparatively high
margins experienced by the Company in the first quarter of 1999 were primarily
related to 1998 backlog before the full impact of depressed commodity prices was
reflected in customer demand and pricing. Current contracts reflect reduced
profitability and breakeven economics. The Company believes that the adverse
economic climate in the oilfield service industry will continue through most of
1999, which is likely to result in significantly lower margins for both of the
Company's business segments through the remainder of the year.
 
     The following discussion of the results of operations is divided into a
discussion of the Company's onshore operations, which includes front-end
services, and the Company's offshore operations. The following table summarizes
the results of operations by operating entity:
 
<TABLE>
<CAPTION>
                                        1998                                1999
                          ---------------------------------   ---------------------------------
                           ONSHORE      OFFSHORE               ONSHORE      OFFSHORE
                          OPERATIONS   OPERATIONS    TOTAL    OPERATIONS   OPERATIONS    TOTAL
                          ----------   ----------   -------   ----------   ----------   -------
<S>                       <C>          <C>          <C>       <C>          <C>          <C>
Operating Revenues......   $17,835       $6,045     $23,880    $16,072      $12,063     $28,135
Operating Expenses......    13,334        4,105      17,439     10,154       10,654      20,808
Gross Margin............     4,501        1,940       6,441      5,918        1,409       7,327
Gross Margin %..........      25.3%        32.8%       26.9%      36.6%        11.0%       26.0%
</TABLE>
 
  ONSHORE OPERATIONS
 
  Quarter Ended March 31, 1998 Compared to March 31, 1999
 
     Revenues decreased 10% from $17.8 million in the first quarter of 1998 to
$16.1 million in the first quarter of 1999, primarily due to fewer projects in
progress during the 1999 quarter as compared to the 1998 quarter. The decrease
was partially offset by the Company's onshore operation in Canada which was
acquired in November 1998.
 
     Operating costs (excluding depreciation) decreased 23% from $13.3 million
in the first quarter of 1998 to $10.2 million in the first quarter of 1999,
primarily due to fewer projects in progress during the 1999 quarter as compared
to the 1998 quarter. The Company reacted to the decline in activity by reducing
operating personnel and project-related expenditures and fully utilizing the
drilling services of its front end services company. In addition, the Company
completed four multi-client projects in Canada during the quarter which allow
for capitalization of multi-client project costs. These factors favorably
impacted the operating margin percentage which improved from 25.3% for the first
quarter of 1998 compared to an operating margin of 36.6% for the 1999 quarter.
 
     Depreciation and amortization increased 37% from $1.9 million in the first
quarter of 1998 to $2.6 million in the first quarter of 1999. This increase
resulted from operating four domestic crews, the front-end services
 
                                       17
<PAGE>   18
 
business for the entire quarter, and two crews in Canada in the 1999 quarter
versus only three domestic crews and the front-end service business for one
month for the 1998 quarter.
 
     Selling, general and administrative expenses decreased 13% from $1.6
million in the first quarter of 1998 to $1.4 million in the first quarter of
1999, due to savings in corporate overhead partially offset by higher marketing
costs incurred for onshore domestic and international projects.
 
     Net interest and other expense increased from $(79,000) in the 1998 period
to $248,000 in the 1999 period primarily due to borrowings from the Company's
working capital credit facilities and interest paid on the Fleet Bank Term Loan,
which commenced in the second quarter of 1998.
 
  OFFSHORE OPERATIONS
 
  Quarter Ended March 31, 1998 Compared to March 31, 1999
 
     Revenue increased 98% from $6.1 million in the first quarter of 1998 to
$12.1 million in the first quarter of 1999, primarily due to increases in vessel
capacity. The Company's vessel the Labrador Horizon was working on multi-client
projects in the Gulf of Mexico for the entire 1999 quarter compared to no
utilization in the 1998 quarter due to a major upgrade. The Austral Horizon,
which began service in the fourth quarter of 1998, worked for the entire quarter
in the Gulf of Mexico. The vessels Discoverer and Celtic Horizon performed
contract work in the Gulf of Mexico for the 1999 quarter as compared to
multi-client work in the Gulf of Mexico for the 1998 quarter. The Pacific
Horizon was fully utilized during both the 1999 and 1998 periods working off the
coast of Argentina. Revenue for the first quarter of 1999 also includes
approximately $1.5 million earned in connection with a vessel charter hire
contract and related services to a third party. The increase in revenue due to
the increase in vessel capacity was partially offset by weather-related downtime
for all the vessels operating in the Gulf of Mexico and a bi-annual maintenance
inspection for the Pacific Horizon.
 
     Operating expenses (excluding depreciation) increased 161% from $4.1
million in the first quarter of 1998 to $10.7 million in the first quarter of
1999 due to the increase in the number of vessels operating during the 1999
quarter. Downtime, decreases in rates available for contract work, and start-up
costs for the Atlantic Horizon contributed to a lower operating margin which
decreased from 32.8% for the 1998 quarter compared to 11.0% for the 1999
quarter.
 
     Depreciation and amortization increased significantly from $1.0 million in
the first quarter of 1998 to $4.1 million in the first quarter of 1999,
resulting from the upgraded Labrador Horizon, depreciation for the Austral
Horizon which began service in the fourth quarter of 1998, and additional
equipment purchased for the Celtic Horizon in the 1998 quarter.
 
     Selling, general and administrative expenses increased from $0.8 million in
the first quarter of 1998 to $1.1 million in the first quarter of 1999 due to
increases in personnel required for the expansion of the Company's vessel fleet
and higher marketing costs.
 
     Net interest and other expense increased significantly from $91,000 in the
first quarter of 1998 to $1.9 million in the first quarter of 1999 primarily due
to interest on the Labrador Horizon's capital lease and interest on the $100
million 10 3/4% Senior Notes. The Company capitalized interest of approximately
$1.2 million in the 1999 quarter compared to $(0) for the 1998 quarter.
 
LIQUIDITY
 
     The current industry environment and debt incurred during the expansion of
the Company in 1998 have contributed to a decline in the Company's working
capital position. The Company had a net working capital deficit of $12.7 million
as of March 31, 1999. The indebtedness of the Company as of such date consisted
of the $13.6 million of short-term borrowings under the Wells Fargo Credit
Facility, the $100 million of 10 3/4% Senior Notes due 2008, borrowings under
the Fleet Capital Term Loan, a capital lease obligation with British Linen Bank,
and other term loans. This indebtedness totaled approximately $147.3 million as
of March 31, 1999.
 
                                       18
<PAGE>   19
 
     The Company has begun taking steps to reduce costs and provide financing
during this difficult period. Additionally, the Company is evaluating potential
additional debt and equity transactions aimed at increasing liquidity. However,
there can be no assurance that additional financing to increase the Company's
liquidity can be obtained.
 
     In May 1999, the Company initiated discussions with a vessel owner for the
decommissioning and release of the charter for the seismic vessel
Discoverer. The vessel is currently working on a contract which the Company
expects to be completed in June 1999.
 
     In April 1999, in an effort to reduce costs and improve utilization of
existing owned vessels, the Company decommissioned the Celtic Horizon.
Negotiations are underway with the charter operator to terminate the Company's
current lease commitments.
 
     In April 1999, the Company obtained a commitment from a financial
institution, subject to negotiation and execution of final documentation, for
the financing of the seismic recording system and streamers for the vessel
Atlantic Horizon (the "Atlantic Horizon Term Loan"). The financing will be an
equipment term loan of approximately $12.0 million payable over a term of seven
years at an interest rate of approximately 9.2% with monthly payments of
principal and interest due of approximately $150,000. All remaining principal
and interest is due at the end of the term. The loan will be secured by the
recording system, streamers, and the vessel Atlantic Horizon.
 
     On March 26, 1999, the Company executed an agreement with Wells Fargo
Business Credit, Inc. (formerly Norwest Business Credit, Inc.) for a $20.0
million revolving credit facility secured by the Company's accounts receivable,
inventory, and certain equipment (the "Wells Fargo Credit Facility"). The amount
the Company may borrow is limited to a borrowing base that is equal to 85% of
eligible U.S. accounts receivable. Interest accrues under the facility at the
bank's base rate plus .375% or at LIBOR plus .275%. Interest only is payable
monthly or at the end of applicable LIBOR interest periods. If all borrowings
under the facility are not repaid annually, then an additional fee of .5% of the
average borrowings outstanding is payable. On March 26, 1999, the Company
borrowed $14.0 million from Wells Fargo and repaid $14.0 million of borrowings
under a revolving credit facility with Bank One Texas, N.A. and terminated the
agreement related to the Bank One credit facility. The Wells Fargo Credit
Facility matures on March 26, 2002. However, borrowings under the facility are
classified as a current liability for accounting purposes due to the required
collection of all the Company's domestic accounts receivable in a lockbox
controlled by Wells Fargo. As of March 31, 1999 and May 10, 1999, the Company
had borrowings outstanding of $13.6 million and $13.9 million, respectively, and
had $6.4 million and $6.1 million, respectively, of borrowing availability
remaining under the Wells Fargo Credit Facility.
 
     The Company anticipates that an increasing percentage of its future
offshore data projects will be multi-client projects. The Company will be
required to fund the portion of the acquisition costs for multi-client data that
is not covered by pre-acquisition licensing commitments. These funding
requirements will vary depending on the cost of the data acquisition project,
the amount of pre-acquisition licensing commitments, and the amount of any costs
funded by any third parties who participate in the projects. The Company will
evaluate each multi-client project in light of the capital commitments of the
project and the Company's other capital commitments as compared to the Company's
liquidity and capital resources.
 
     The Company believes that its cash flow from operations, borrowings under
the Wells Fargo Credit Facility, borrowings under the Atlantic Horizon Term
Loan, and other vendor financing will be sufficient to fund its planned capital
expenditures and operating requirements through the end of 1999. Any capital
expenditures in excess of the Company's planned amounts will likely require
additional debt or equity financing. If the Company is not able to obtain such
additional financing, it may be unable to incur capital expenditures in excess
of its planned capital expenditures. If additional working capital were to
become necessary as a result of further deterioration in demand for or pricing
of the Company's services, and if additional financing was not available, the
Company's operating results and financial condition would be adversely affected.
 
                                       19
<PAGE>   20
 
YEAR 2000
 
     The Company is currently in the process of evaluating its computer hardware
and software systems to ensure such programs and systems will be able to process
transactions in the year 2000 ("Y2K"). The Company is also currently identifying
other equipment which contains embedded electronics that may render the
equipment inoperable in the year 2000 and is evaluating the plans of its
material suppliers and vendors to become Y2K compliant. The Company anticipates
it will have hardware and software critical to its operation Y2K compliant
before the end of 1999. The Company is currently evaluating the time table upon
which all other hardware, software, and equipment can be made Y2K compliant and
will target a date when the evaluation is complete.
 
     Although it is not possible to accurately estimate the costs of this
information analysis, at this time the Company expects that such costs will not
be material to the Company's financial position or the results of operations.
There can be no assurance, however, that the Company, its suppliers and vendors
or their respective software vendors will complete all modifications to all
material information technology systems in a timely manner, or as to the costs
associated with the Company becoming Y2K compliant, or the costs of the failure
of any of the Company's vendors failing to become Y2K compliant.
 
     The Company's risks due to failure of computer hardware and software not
being Y2K compliant include the risk that the Company's seismic recording
systems will not operate properly or as efficiently, thus causing an unexpected
decline in revenue. The Company also risks not being able to record and process
transactions properly in its accounting system. Such risks could lead to a
material business interruption and could have a material adverse impact on the
Company's results of operations, although the amount can not be estimated. The
Company will continue to consider the likelihood of a material business
interruption due to the Year 2000 problem, and if necessary, implement an
appropriate contingency plan.
 
INFORMATION REGARDING FORWARD LOOKING STATEMENTS
 
     This Quarterly Report on Form 10-Q includes forward looking statements
within the meaning of Section 27A of the Securities Act of 1933 and Section 21E
of the Securities Exchange Act of 1934. Although the Company believes that its
expectations are based on reasonable assumptions, it can give no assurance that
its goals will be achieved. Important factors that could cause actual results to
differ materially from those in the forward looking statements herein include,
but are not limited to, changes in the exploration budgets of the Company's
seismic data and related services customers, actual customer demand for the
Company's seismic acquisition services, and the timing and extent of changes in
commodity prices for natural gas, crude oil and condensate and natural gas
liquids and conditions in the capital markets and equity markets during the
periods covered by the forward looking statements.
 
ITEM 3 -- QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
 
     The Company is exposed to market risk, including adverse changes in
interest rates and foreign currency exchange rates. Refer to the Company's Form
10-K for the year ended December 31, 1998 for a detailed discussion of these
risks. Changes in the Company's market risk exposures since December 31, 1998
are discussed below.
 
     Prior to March 26, 1999, the Company had a $20 million revolving credit
facility with Bank One, Texas, N.A. that provided for a variable interest rate.
Interest on this facility accrued at the bank's base rate plus a margin
depending on the Company's debt to net worth ratio. As of December 31, 1998, no
borrowings were outstanding under this facility. As of March 26, 1999, the
Company entered into a new revolving credit facility with Wells Fargo Business
Credit, Inc. (formerly Norwest Business Credit, Inc.) and terminated its credit
facility with Bank One. Interest accrues under the Wells Fargo facility at the
bank's base rate plus .375% or at LIBOR plus .275%. As of May 10, 1999
approximately $13.9 million was borrowed under this facility. The carrying value
and fair value of this debt are the same. Changes in interest rates under the
Bank One facility prior to March 26, 1999 and under the Wells Fargo credit
facility after March 26, 1999 would effect the Company's results of operations
and cash flow requirements for interest expense.
 
                                       20
<PAGE>   21
                          PART II -- OTHER INFORMATION
 
ITEMS 1-5 -- NOT APPLICABLE
 
ITEM 6 -- EXHIBITS AND REPORTS ON FORM 8-K
 
<TABLE>
<C>                      <S>
        (a) 10.1         -- Credit and Security Agreement by and among Eagle
                            Geophysical, Inc., Eagle Geophysical Onshore, Inc., Eagle
                            Geophysical Royalty, Inc., Eagle Geophysical de Mexico,
                            Inc., Eagle Geophysical Front End Services, Inc., Eagle
                            Geophysical Management, Inc., Eagle Geophysical GOM,
                            Inc., Eagle Geophysical Front End Services, LTD, Eagle
                            Geophysical de Columbia, Inc., Eagle Geophysical de Peru,
                            Inc., Austral Horizon, Inc., Atlantic Horizon, Inc.,
                            Eagle Geophysical de Bolivia, Inc., Eagle Geophysical de
                            Argentina, Inc., and Eagle Geophysical de Ecuador, Inc.
                            and Norwest Business Credit, Inc. dated as of March 26,
                            1999 (the "Credit Agreement").
            10.2         -- Revolving Note under the Credit Agreement dated March 26,
                            1999
            10.3         -- Severance Agreement among the Company, Exploration
                            Holdings, Ltd. and Gerald M. Harrison dated April 16,
                            1999.
            27.1         -- Financial Data Schedule

        (b) Not applicable.
</TABLE>
 


                                       21
<PAGE>   22
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.
 
                                            EAGLE GEOPHYSICAL, INC.
 
<TABLE>
<CAPTION>
                      SIGNATURE                                      TITLE                    DATE
                      ---------                                      -----                    ----
<C>                                                      <S>                              <C>
 
                /s/ JAY N. SILVERMAN                     President                        May 14, 1999
- -----------------------------------------------------
                  Jay N. Silverman
 
               /s/ RICHARD W. MCNAIRY                    Chief Financial Officer          May 14, 1999
- -----------------------------------------------------
                  Richard W.McNairy
 
                /s/ DAVID H. SAINDON                     Chief Accounting Officer         May 14, 1999
- -----------------------------------------------------
                  David H. Saindon
</TABLE>
 
                                       22
<PAGE>   23
 
                               INDEX TO EXHIBITS
 
<TABLE>
<CAPTION>
     EXHIBIT NUMBER                              DESCRIPTION
     --------------                              -----------
<C>                      <S>
         10.1            -- Credit and Security Agreement by and among Eagle
                            Geophysical, Inc., Eagle Geophysical Onshore, Inc., Eagle
                            Geophysical Royalty, Inc., Eagle Geophysical de Mexico,
                            Inc., Eagle Geophysical Front End Services, Inc., Eagle
                            Geophysical Management, Inc., Eagle Geophysical GOM,
                            Inc., Eagle Geophysical Front End Services, LTD, Eagle
                            Geophysical de Columbia, Inc., Eagle Geophysical de Peru,
                            Inc., Austral Horizon, Inc., Atlantic Horizon, Inc.,
                            Eagle Geophysical de Bolivia, Inc., Eagle Geophysical de
                            Argentina, Inc., and Eagle Geophysical de Ecuador, Inc.
                            and Norwest Business Credit, Inc. dated as of March 26,
                            1999 (the "Credit Agreement").
         10.2            -- Revolving Note under the Credit Agreement dated March 26,
                            1999
         10.3            -- Severance Agreement among the Company, Exploration
                            Holdings, Ltd. and Gerald M. Harrison dated April 16,
                            1999.
         27.1            -- Financial Data Schedule
</TABLE>

<PAGE>   1
                                                                    EXHIBIT 10.1


================================================================================
                         CREDIT AND SECURITY AGREEMENT

                                  BY AND AMONG

                            EAGLE GEOPHYSICAL, INC.
                        EAGLE GEOPHYSICAL ONSHORE, INC,
                       EAGLE GEOPHYSICAL OFFSHORE, INC.,
                  EAGLE GEOPHYSICAL ROYALTY, INC. (F/K/A EAGLE
                          GEOPHYSICAL LEASING, INC.),
                       EAGLE GEOPHYSICAL DE MEXICO, INC.,
                        EAGLE FRONT END SERVICES, INC.,
                      EAGLE GEOPHYSICAL MANAGEMENT, INC.,
                          EAGLE GEOPHYSICAL GOM, INC.,
                        EAGLE FRONT END SERVICES, LTD.,
                      EAGLE GEOPHYSICAL DE COLOMBIA, INC.
                        EAGLE GEOPHYSICAL DE PERU, INC.,
                             AUSTRAL HORIZON, INC.,
                             ATLANTIC HORIZON, INC.
                       EAGLE GEOPHYSICAL DE BOLIVIA, INC.
                      EAGLE GEOPHYSICAL DE ARGENTINA, INC.
                     AND EAGLE GEOPHYSICAL DE ECUADOR, INC.

                                      AND

                         NORWEST BUSINESS CREDIT, INC.


                          Dated as of: MARCH 26, 1999

                                 [NORWEST LOGO]






================================================================================


<PAGE>   2







                               Table of Contents

<TABLE>
<CAPTION>

<S>                                                                                                              <C>
ARTICLE I  Definitions                                                                                            1
    Section 1.1 Definitions.......................................................................................1
    Section 1.2 Cross References.................................................................................14

ARTICLE II  Amount and Terms of the Credit Facility                                                              14
    Section 2.1 Revolving Advances...............................................................................14
    Section 2.2 Foreign Accounts.................................................................................15
    Section 2.3 Letters of Credit................................................................................15
    Section 2.4 Payment of Amounts Drawn Under Letters of Credit; Obligation of
    Reimbursement................................................................................................15
    Section 2.5 Special Account..................................................................................16
    Section 2.6 Obligations Absolute.............................................................................16
    Section 2.7 Procedures for Borrowing.........................................................................17
    Section 2.8 Converting Floating Rate Advances to Eurodollar Advances; Procedures.............................18
    Section 2.9 Procedures at End of a Interest Period...........................................................18
    Section 2.10 Setting and Notice of Rates.....................................................................19
    Section 2.11 Funding Losses..................................................................................19
    Section 2.12 Right of Lender to Fund through Other Offices...................................................19
    Section 2.13 Discretion of Lender as to Manner of Funding....................................................19
    Section 2.14 Interest; Default Interest; Participations; Usury...............................................20
    Section 2.15 Fees............................................................................................21
    Section 2.16 Computation of Interest and Fees; When Interest Due and Payable.................................22
    Section 2.17 Increased Costs on Eurodollar Advances; Capital Adequacy; Increased Costs
    and Reduced Return...........................................................................................22
    Section 2.18 Funding Exceptions..............................................................................25
    Section 2.19 Voluntary Prepayment; Reduction of the Maximum Line; Termination of the
    Credit Facility by the Borrowers.............................................................................26
    Section 2.20 Termination, Line Reduction and Prepayment Fees; Waiver of Termination,
    Prepayment and Line Reduction Fees...........................................................................26
    Section 2.21 Mandatory Prepayment............................................................................26
    Section 2.22 Payment.........................................................................................27
    Section 2.23 Payment on Non-Banking Days.....................................................................27
    Section 2.24 Use of Proceeds.................................................................................27
    Section 2.25 Liability Records...............................................................................27

ARTICLE III  Security Interest; Occupancy; Setoff                                                                27
    Section 3.1 Grant of Security Interest.......................................................................27
    Section 3.2 Notification of Account Debtors and Other Obligors...............................................27
    Section 3.3 Assignment of Insurance..........................................................................28
</TABLE>



                                        i

<PAGE>   3

<TABLE>
<CAPTION>

<S>                                                                                                              <C>
    Section 3.4 Occupancy........................................................................................28
    Section 3.5 License..........................................................................................29
    Section 3.6 Financing Statement..............................................................................29
    Section 3.7 Setoff...........................................................................................29
    Section 3.8 Accommodation Party Defenses Waived..............................................................29

ARTICLE IV  Conditions of Lending                                                                                30
    Section 4.1 Conditions Precedent to the Initial Revolving Advance and the Initial Letter of
    Credit.......................................................................................................30
    Section 4.3 Condition Precedent to Revolving Advances over $5 million........................................32
    Section 4.4 Conditions Precedent to All Advances and Letters of Credit.......................................32

ARTICLE V  Representations and Warranties                                                                        32
    Section 5.1 Corporate Existence and Power; Name; Chief Executive Office; Inventory and
    Equipment Locations; Tax Identification Number...............................................................32
    Section 5.2 Capitalization...................................................................................33
    Section 5.3 Authorization of Borrowing; No Conflict as to Law or Agreements..................................33
    Section 5.4 Legal Agreements.................................................................................33
    Section 5.5 Subsidiaries.....................................................................................34
    Section 5.6 Financial Condition; No Adverse Change...........................................................34
    Section 5.7 Litigation.......................................................................................34
    Section 5.8 Regulation U.....................................................................................34
    Section 5.9 Taxes............................................................................................34
    Section 5.10 Titles and Liens................................................................................34
    Section 5.11 Intellectual Property Rights....................................................................34
    Section 5.12 Plans...........................................................................................35
    Section 5.13 Default.........................................................................................35
    Section 5.14 Environmental Matters...........................................................................35
    Section 5.15 Submissions to Lender...........................................................................36
    Section 5.16 Financing Statements............................................................................37
    Section 5.17 Rights to Payment...............................................................................37
    Section 5.18 Financial Solvency..............................................................................37

ARTICLE VI  Borrowers' Affirmative Covenants                                                                     38
    Section 6.1 Reporting Requirements...........................................................................38
    Section 6.2 Books and Records; Inspection and Examination....................................................41
    Section 6.3 Account Verification.............................................................................41
    Section 6.4 Compliance with Laws.............................................................................41
    Section 6.5 Payment of Taxes and Other Claims................................................................42
    Section 6.6 Maintenance of Properties........................................................................42
    Section 6.7 Ownership of Ships...............................................................................42
    Section 6.8 Insurance........................................................................................42
    Section 6.9 Preservation of Existence........................................................................43
    Section 6.10 Delivery of Instruments, etc....................................................................43
    Section 6.11 Collateral Account..............................................................................43
    Section 6.12 Ship Mortgages..................................................................................44
</TABLE>




Table of Contents

                                       ii

<PAGE>   4


<TABLE>
<CAPTION>

<S>                                                                                                              <C>
    Section 6.13 Performance by the Lender.......................................................................44
    Section 6.14 Minimum Consolidated EBITDA Coverage Ratio......................................................45
    Section 6.15 Minimum Consolidated Modified Tangible Net Worth................................................45
    Section 6.16 Minimum Consolidated Current Ratio..............................................................45

ARTICLE VII  Negative Covenants                                                                                  45
    Section 7.1 Liens............................................................................................45
    Section 7.2 Indebtedness.....................................................................................47
    Section 7.3 Guaranties.......................................................................................47
    Section 7.4 Investments and Subsidiaries.....................................................................47
    Section 7.5 Dividends........................................................................................48
    Section 7.6 Sale or Transfer of Assets; Suspension of Business Operations....................................48
    Section 7.7 Intellectual Property............................................................................48
    Section 7.8 Consolidation and Merger; Asset Acquisitions.....................................................48
    Section 7.9 Sale and Leaseback...............................................................................49
    Section 7.10 Restrictions on Nature of Business..............................................................49
    Section 7.11 Capital Expenditures............................................................................49
    Section 7.12 Accounting......................................................................................49
    Section 7.13 Discounts, etc..................................................................................49
    Section 7.14 Defined Benefit Pension Plans...................................................................49
    Section 7.15 Other Defaults..................................................................................49
    Section 7.16 Place of Business; Name.........................................................................49
    Section 7.17 Organizational Documents........................................................................50
    Section 7.18 Salaries........................................................................................50
    Section 7.19 Change of Control...............................................................................50
    Section 7.20 Transactions with Affiliates....................................................................50

ARTICLE VIII  Events of Default, Rights and Remedies                                                             50
    Section 8.1 Events of Default................................................................................50
    Section 8.2 Rights and Remedies..............................................................................53
    Section 8.3 Certain Notices..................................................................................53

ARTICLE IX  Miscellaneous                                                                                        54
    Section 9.1 No Waiver; Cumulative Remedies...................................................................54
    Section 9.2 Amendments, Etc..................................................................................54
    Section 9.3 Addresses for Notices, Etc.......................................................................54
    Section 9.4 Further Documents................................................................................55
    Section 9.5 Collateral.......................................................................................55
    Section 9.6 Costs and Expenses...............................................................................55
    Section 9.7 Indemnity........................................................................................55
    Section 9.8 Participants.....................................................................................56
    Section 9.9 Execution in Counterparts........................................................................56
    Section 9.10 Binding Effect; Assignment; Complete Agreement; Exchanging Information..........................57
    Section 9.11 Severability of Provisions......................................................................57
    Section 9.12 Headings........................................................................................57
    Section 9.13 Governing Law; Jurisdiction, Venue; Waiver of Jury Trial........................................57
</TABLE>



Table of Contents

                                       iii

<PAGE>   5







                          CREDIT AND SECURITY AGREEMENT

                           Dated as of March 26, 1999

                  Eagle Geophysical, Inc., a Delaware corporation (the "Parent
Borrower"), Eagle Geophysical Onshore, Inc, a Delaware corporation, Eagle
Geophysical Offshore, Inc., a Delaware corporation, Eagle Geophysical Royalty,
Inc. (f/k/a Eagle Geophysical Leasing, Inc.), a Delaware corporation, Eagle
Geophysical de Mexico, Inc., a Delaware corporation, Eagle Front End Services,
Inc., a Delaware corporation, Eagle Geophysical Management, Inc., a Delaware
corporation, Eagle Geophysical GOM, Inc., a Delaware corporation, Eagle Front
End Services, Ltd., a Texas limited partnership, Eagle Geophysical de Colombia,
Inc., a Delaware corporation, Eagle Geophysical de Peru, Inc., a Delaware
corporation, Austral Horizon, Inc., a Delaware corporation, Atlantic Horizon,
Inc., a Delaware corporation, Eagle Geophysical de Bolivia, Inc., a Delaware
corporation, Eagle Geophysical de Argentina, Inc., a Delaware corporation and
Eagle Geophysical de Ecuador, Inc., a Delaware corporation (collectively, with
the Parent Borrower, the "Borrowers" and each a "Borrower") and Norwest Business
Credit, Inc., a Minnesota corporation (the "Lender"), hereby agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

                  Section 1.1 Definitions. For all purposes of this Agreement,
except as otherwise expressly provided or unless the context otherwise requires:

                  (a) the terms defined in this Article have the meanings
         assigned to them in this Article, and include the plural as well as the
         singular; and

                  (b) all accounting terms not otherwise defined herein have the
         meanings assigned to them in accordance with GAAP.

                  "Accounts" means, as to any Person, all of that Person's
         accounts, as such term is defined in the UCC, including without
         limitation the aggregate unpaid obligations of customers and other
         account debtors to that Person arising out of the sale or lease of
         goods or rendition of services by that Person on an open account or
         deferred payment basis.

                  "Advance" means a Revolving Advance.

                  "Affiliate" means, with respect to any specified person, any
         other person directly or indirectly controlling or controlled by or
         under direct or indirect common 

<PAGE>   6


         control with such specified person. For the purposes of this
         definition, "control," when used with respect to any specified person,
         means the power to direct the management and policies of such person,
         directly or indirectly, whether through the ownership of voting
         securities, by contract or otherwise; and the terms "controlling" and
         "controlled" have meanings correlative to the foregoing.

                  "Agreement" means this Credit and Security Agreement, as
         amended, supplemented or restated from time to time.

                  "Asset Sale" means any sale, issuance, conveyance, transfer,
         lease or other disposition (including, without limitation, by way of
         merger or consolidation) (collectively, a "transfer") by the Parent
         Borrower or a Restricted Subsidiary, directly or indirectly, in one or
         a series of related transactions, to any person other than the Parent
         Borrower or a Restricted Subsidiary of (a) any Capital Stock of any
         Restricted Subsidiary, (b) all or substantially all of the properties
         and assets of the Parent Borrower and its Restricted Subsidiaries
         representing a division or line of business or (c) any other properties
         or assets of the Parent Borrower or any Restricted Subsidiary, other
         than in the ordinary course of business. For the purposes of this
         definition, the term "Asset Sale" does not include any transfer of
         properties or assets (i) that is governed by the provisions of Section
         801 of the Indenture, (ii) between or among the Parent Borrower and its
         Restricted Subsidiaries pursuant to transactions that do not violate
         any other provision of the Indenture or this Agreement, (iii) to an
         Unrestricted Subsidiary, if permitted under Section 1011 of the
         Indenture, (iv) representing obsolete or permanently retired equipment
         and facilities (v) the gross proceeds of which (exclusive of
         indemnities) do not exceed $500,000 for any particular item or
         $1,000,000 in the aggregate for any fiscal year or (vi) that is a lease
         of a towed-streamer seismic data acquisition vessel owned by the Parent
         Borrower or any Restricted Subsidiary, provided that (A) such lease
         shall not provide for the acquisition of such vessel by the lessee
         during or at the end of the term thereof for an amount that is less
         than the fair market value thereof at the time the right to acquire
         such property is granted, (B) the term of such lease shall not exceed
         twelve months, (C) such lease shall provide that upon an Event of
         Default under this Indenture such lease would automatically terminate,
         (D) not more than the greater of (I) one such vessel or (II) one-third
         of all of such vessels may be subject to such a lease at any one time
         and (E) the Parent Borrower or a Restricted Subsidiary shall retain
         legal title to such vessel at all times during the term of such lease.

                  "Availability" means the difference of (i) the Borrowing Base
         and (ii) the sum of (A) the outstanding principal balance of the
         Revolving Note and (B) the L/C Amount.

                  "Banking Day" means a day other than a Saturday, Sunday or
         other day on which banks are generally not open for business in San
         Antonio, Texas or Minneapolis, Minnesota and, if such day relates to a
         Eurodollar Advance, a day on which dealings are carried on in the
         London interbank Eurodollar market.


                                       -2-
Eagle Geophysical Credit Agreement


<PAGE>   7

                  "Base Rate" means the rate of interest publicly announced from
         time to time by Norwest Bank Minnesota, National Association as its
         "base rate" or, if such bank ceases to announce a rate so designated,
         any similar successor rate designated by the Lender.

                  "Borrowing Base" means, at any time the lesser of:

                  (a)      the Maximum Line; or

                  (b) subject to change from time to time in the Lender's sole
         discretion, the sum of:

                           (i)  85% of Eligible Domestic Accounts; and

                           (ii) 80% of Eligible Foreign Accounts.

                  "Capital Expenditures" means, as to any Person, any
         expenditure of money for the lease, purchase or other acquisition of
         any capital asset, or for the lease of any other asset whether payable
         currently or in the future.

                  "Capital Stock" of any Person means any and all shares,
         interests, partnership interests, participations, rights in or other
         equivalents (however designated) of such person's equity interest
         (however designated).

                  "Capitalized Lease Obligation" means, with respect to any
         Person, an obligation incurred or assumed under or in connection with
         any capital lease of real or personal property that, in accordance with
         GAAP, has been recorded as a capitalized lease.

                  "Change of Control" means the occurrence of any of the
         following events:

                           (a) Any Person or "group" (as such term is used in
                  Sections 13(d) and 14(d) of the Exchange Act) is or becomes
                  the "beneficial owner" (as defined in Rules 13d-3 and 13d-5
                  under the Exchange Act, except that a Person will be deemed to
                  have "beneficial ownership" of all securities that such Person
                  has the right to acquire, whether such right is exercisable
                  immediately or only after the passage of time), directly or
                  indirectly, of more than a majority of the voting power of all
                  classes of Voting Stock of the Parent Borrower.

                           (b) During any consecutive two-year period,
                  individuals who at the beginning of such period constituted
                  the board of directors of the Parent Borrower (together with
                  any new directors whose election to such board of directors,
                  or whose nomination for election by the stockholders of the
                  Parent Borrower, was approved by a vote of 66-2/3% of the
                  directors then still in office who were either directors at
                  the beginning of such period or whose election or nomination
                  for election was previously so approved) cease for any reason
                  to constitute a majority of the Board of Directors of the
                  Parent Borrower then in office.



                                       -3-
Eagle Geophysical Credit Agreement


<PAGE>   8

                           (c) The Parent Borrower is liquidated or dissolved or
                  adopts a plan of liquidation or dissolution.

                  "Clean Up Period" has the meaning given in Section 2.15(c).

                  "Collateral" means all of the Borrowers' Equipment, General
         Intangibles, Inventory, Receivables, Investment Property, all sums on
         deposit in any Collateral Account and any items in any Lockbox;
         together with (i) all substitutions and replacements for and products
         of any of the foregoing; (ii) proceeds of any and all of the foregoing;
         (iii) in the case of all tangible goods, all accessions; (iv) all
         accessories, attachments, parts, equipment and repairs now or hereafter
         attached or affixed to or used in connection with any tangible goods;
         (v) all warehouse receipts, bills of lading and other documents of
         title now or hereafter covering such goods; and (vi) all sums on
         deposit in the Special Account.

                  "Collateral Account" has the meaning given in the Collateral
         Account Agreement.

                  "Collateral Account Agreement" means the Collateral Account
         Agreement of even date herewith by and among the Borrowers, Wells Fargo
         and the Lender.

                  "Commitment" means the Lender's commitment to make Advances
         and to cause the Issuer to issue Letters of Credit to or for the
         Borrowers' account pursuant to Article II.

                  "Company" means any Borrower, any Guarantor or any Subsidiary
         of any Borrower or any Guarantor, and "Companies" means the Borrowers,
         the Guarantors and each Subsidiary of a Borrower or a Guarantor.

                  "Consolidated Adjusted Net Income" means, for any period, the
         net income (or net loss) of the Parent Borrower and its Restricted
         Subsidiaries for such period as determined on a consolidated basis in
         accordance with GAAP, adjusted to the extent included in calculating
         such net income or loss by excluding (a) any net after-tax
         extraordinary gains or losses (less all fees and expenses relating
         thereto), (b) any net after-tax gains or losses (less all fees and
         expenses relating thereto) attributable to Asset Sales, (c) the portion
         of net income (or loss) of any Person (other than the Parent Borrower
         or a Restricted Subsidiary), including Unrestricted Subsidiaries, in
         which the Parent Borrower or any Restricted Subsidiary has an ownership
         interest, except to the extent of the amount of dividends or other
         distributions actually paid to the Parent Borrower or any Restricted
         Subsidiary in cash during such period, and (d) the net income (or loss)
         of any Person combined with the Parent Borrower or any Restricted
         Subsidiary on a "pooling of interests" basis attributable to any period
         prior to the date of combination.


                                      -4-
Eagle Geophysical Credit Agreement
<PAGE>   9

                  "Consolidated Current Ratio" means as of any date the ratio of
         the Parent Borrower's consolidated current assets to its consolidated
         current liabilities on such date.

                  "Consolidated EBITDA" means, for any period, the sum of,
         without duplication, Consolidated Adjusted Net Income for such period,
         plus (or, in the case of clause (d) below, plus or minus) the following
         items to the extent included in computing Consolidated Adjusted Net
         Income for such period (a) Consolidated Fixed Charges for such period,
         plus (b) the provision for federal, state, local and foreign income
         taxes of the Parent Borrower and its Restricted Subsidiaries for such
         period, plus (c) the aggregate depreciation and amortization expense of
         the Parent Borrower and its Restricted Subsidiaries for such period,
         plus (d) any other non-cash charges for such period, and minus non-cash
         credits for such period, other than non-cash charges or credits
         resulting from changes in prepaid assets or accrued liabilities in the
         ordinary course of business; provided that fixed charges, income tax
         expense, depreciation and amortization expense and non-cash charges and
         credits of a Restricted Subsidiary shall be included in Consolidated
         EBITDA only to the extent (and in the same proportion) that the net
         income of such Subsidiary was included in calculating Consolidated
         Adjusted Net Income for such period.

                  "Consolidated EBITDA Coverage Ratio" means, as of any date,
         the ratio of Consolidated EBITDA for the twelve (12) month period
         ending on such date to Consolidated Fixed Charges for the twelve (12)
         month period ending on such date.

                  "Consolidated Fixed Charges" means, for any period, without
         duplication, the sum of (a) the amount that, in conformity with GAAP,
         would be set forth opposite the caption "interest expense" (or any like
         caption) on a consolidated statement of operations of the Parent
         Borrower and its Restricted Subsidiaries for such period, including,
         without limitation, (i) amortization of debt discount, (ii) the net
         cost of interest rate contracts (including amortization of discounts),
         (iii) the interest portion of any deferred payment obligation, (iv)
         amortization of debt issuance costs and (v) the interest component of
         Capitalized Lease Obligations, plus (b) cash dividends paid on
         Preferred Stock and Disqualified Stock by the Parent Borrower and any
         Restricted Subsidiary (to any Person other than the Parent Borrower and
         its Restricted Subsidiaries), plus (c) all interest on any Debt of any
         Person guaranteed by the Parent Borrower or any of its Restricted
         Subsidiaries; provided, however, that Consolidated Fixed Charges shall
         not include (i) any gain or loss from extinguishment of debt, including
         the write-off of debt issuance costs and (ii) the fixed charges of a
         Restricted Subsidiary to the extent (and in the same proportion) that
         the net income of such Subsidiary was excluded in calculating
         Consolidated Adjusted Net Income pursuant to clause (e) of the
         definition thereof for such period.

                  "Consolidated Modified Tangible Net Worth" means, at any time,
         the consolidated Tangible Net Worth of the Parent Borrower, less
         twenty-five percent (25%) of the value of Multiclient Surveys shown on
         the Parent Borrower's balance sheet.



                                      -5-
Eagle Geophysical Credit Agreement
<PAGE>   10


                  "Consolidated Net Income" means, for a stated period, the
         Parent Borrower's consolidated after-tax net income from continuing
         operations as determined in accordance with GAAP.

                  "Credit Facility" means the credit facility being made
         available to the Borrowers by the Lender pursuant to Article II.

                  "Debt" of any Person means all items of indebtedness or
         liability which in accordance with GAAP would be included in
         determining total liabilities as shown on the liabilities side of a
         balance sheet of that Person as of the date as of which Debt is to be
         determined. For purposes of determining a Person's aggregate Debt at
         any time, "Debt" shall also include the aggregate payments required to
         be made by such Person at any time under any lease that is considered a
         capitalized lease under GAAP.

                  "Default" means an event that, with giving of notice or
         passage of time or both, would constitute an Event of Default.

                  "Default Period" means any period of time beginning on the
         first day of any month during which a Default or Event of Default has
         occurred and ending on the date the Lender notifies the Parent Borrower
         in writing that such Default or Event of Default has been cured or
         waived.

                  "Default Rate" means an annual rate equal to two (2%) over the
         Floating Rate, which rate shall change when and as the Floating Rate
         changes.

                  "Disqualified Stock" means any class or series of Capital
         Stock that, either by its terms, or by the terms of any security into
         which it is convertible or exchangeable or by contract or otherwise (i)
         is, or upon the happening of an event or passage of time would be,
         required to be redeemed prior to one year after the final Stated
         Maturity of the Securities (as defined in the Indenture), (ii) is
         redeemable at the option of the holder thereof at any time prior to one
         year after such final Stated Maturity or (iii) at the option of the
         holder thereof, is convertible into or exchangeable for debt securities
         at any time prior to one year after such final Stated Maturity;
         provided that any Capital Stock that would not constitute Disqualified
         Stock but for provisions therein giving holders thereof the right to
         cause the issuer thereof to repurchase or redeem such Capital Stock
         upon the occurrence of an "asset sale" or "change of control" occurring
         prior to the Stated Maturity of the Securities shall not constitute
         Disqualified Stock if the "asset sale" or "change of control"
         provisions applicable to such Capital Stock are no more favorable to
         the holders of such Capital Stock than the provisions contained in
         Sections 1012 and 1013 of the Indenture and such Capital Stock
         specifically provides that the issuer shall not repurchase or redeem
         any such stock pursuant to such provision prior to the Company's
         repurchase of such Securities as are required to be repurchased
         pursuant to Sections 1012 and 1013 of the Indenture.






                                      -6-
Eagle Geophysical Credit Agreement
<PAGE>   11

                  "ERISA" means the Employee Retirement Income Security Act of
         1974, as amended.

                  "Eligible Accounts" means all unpaid Accounts owed to a
         Borrower, net of any credits, except the following shall not in any
         event be deemed Eligible Accounts:

                           (i) that portion of Accounts unpaid 60 days or more
                  after the due date or unpaid 90 days or more after the
                  original invoice date;

                           (ii) that portion of Accounts that is disputed or
                  subject to a claim of offset or a contra account;

                           (iii) that portion of Accounts not yet earned by the
                  final delivery of goods or rendition of services, as
                  applicable, by a Borrower to the customer;

                           (iv) that portion of Accounts for which the
                  applicable Borrower has not yet sent an invoice to the
                  customer;

                           (v) Accounts owed by any unit of government, whether
                  foreign or domestic (provided, however, that there shall be
                  included in Eligible Accounts that portion of Accounts owed by
                  such units of government for which the Borrowers have provided
                  evidence satisfactory to the Lender that (A) the Lender has a
                  first priority perfected security interest and (B) such
                  Accounts may be enforced by the Lender directly against such
                  unit of government under all applicable laws);

                           (vi) Accounts owed by an account debtor that is
                  insolvent, the subject of bankruptcy proceedings or has gone
                  out of business;

                           (vii) Accounts owed by a shareholder, Subsidiary,
                  Affiliate, officer or employee of a Borrower, provided,
                  however, that Accounts owed by any member of the Seitel Group
                  shall not be excluded under this clause (vii) so long as
                  Seitel has not revoked the Seitel No Offset Agreement.

                           (viii) Accounts not subject to a duly perfected
                  security interest in the Lender's favor or which are subject
                  to any Lien in favor of a Person other than the Lender;

                           (ix) That portion of Accounts that has been
                  restructured, extended, amended or modified;

                           (x) That portion of Accounts that constitutes
                  advertising, finance charges, service charges or sales or
                  excise taxes;

                           (xi) Accounts owed by an account debtor, regardless
                  of whether otherwise eligible, if 25% or more of the total
                  amount due under Accounts from such debtor is ineligible under
                  clauses (i), (ii) or (ix) above; and

                           (xii) Accounts, or portions thereof, otherwise deemed
                  ineligible by the Lender in its sole discretion.

                  "Eligible Domestic Accounts" means all Eligible Accounts owed
         by account





                                      -7-

Eagle Geophysical Credit Agreement  

<PAGE>   12

         debtors located in the United States.

                  "Eligible Foreign Accounts" means all Eligible Accounts owed
         by account debtors located outside of the United States and acceptable
         to the Lender in its sole discretion.

                  "Environmental Laws" has the meaning specified in Section
         5.14.

                  "Equipment" means, as to any Person, all of that Person's
         equipment, as such term is defined in the UCC, whether now owned or
         hereafter acquired, including but not limited to all present and future
         machinery, vehicles, furniture, fixtures, manufacturing equipment, shop
         equipment, office and recordkeeping equipment, parts, tools, supplies,
         and including specifically (without limitation) the goods described in
         any equipment schedule or list herewith or hereafter furnished to the
         Lender by that Person.

                  "Eurodollar Advance" means any Advance which bears interest at
         a rate determined by reference to a Eurodollar Rate.

                  "Eurodollar Base Rate" means, with respect to an Interest
         Period, the rate per annum equal to the rate (rounded up to the nearest
         one-eighth of one percent (1/8%)) determined by the Lender in
         accordance with Section 2.10 to be a rate at which US Dollar deposits
         are offered to major banks in the London interbank eurodollar market
         for funds to be made available on the first day of such US Interest
         Period and maturing at the end of such US Interest Period.

                  "Eurodollar Rate" means, with respect to an Interest Period,
         the rate obtained by adding (a) the applicable Margin to (b) the rate
         obtained by dividing (i) the applicable Eurodollar Base Rate by (ii) a
         percentage equal to one (1.00) minus the applicable percentage
         (expressed as a decimal) prescribed by the Board of Governors of the
         Federal Reserve System (or any successor thereto) for determining the
         maximum reserve requirements applicable to eurodollar fundings
         (currently referred to as "Eurocurrency Liabilities" in Regulation D)
         or any other maximum reserve requirements applicable to a member bank
         of the Federal Reserve System with respect to Eurodollar Advances.

                  "Exchange Act" means the Securities Exchange Act of 1934, as
         amended.

                  "Event of Default" has the meaning specified in Section 8.1.

                  "Floating Rate" means an annual rate equal to the sum of the
         Base Rate plus the Margin, which annual rate shall change when and as
         the Base Rate changes.

                  "Foreign Guarantor" means Horizon Exploration, Ltd., an
         English corporation, Exploration Holdings, Ltd., an English
         corporation, and Energy Research International, a Cayman Islands
         corporation.




                                      -8-

Eagle Geophysical Credit Agreement  
<PAGE>   13

                  "Funding Date" has the meaning given in Section 2.1.

                  "GAAP" means generally accepted accounting principles, applied
         on a basis consistent with the accounting practices applied in the
         financial statements described in Section 5.6.

                  "General Intangibles" means, as to any Person, all of that
         Person's general intangibles, as such term is defined in the UCC,
         whether now owned or hereafter acquired, including (without limitation)
         all present and future patents, patent applications, copyrights,
         service marks, trademarks, trade names, trade secrets, customer or
         supplier lists and contracts, manuals, operating instructions, permits,
         franchises, royalties, fees, payments from Multi-Client Surveys, the
         right to use that Person's name, and the goodwill of that Person's
         business.

                  "Guarantor Collateral" means any collateral in which a
         Guarantor has granted the Lender a security interest.

                  "Guarantor Documents" means for each Guarantor as applicable,
         its Guaranty, Guarantor Security Agreement and any other document
         issued in connection therewith or the Loan Documents.

                  "Guarantor Security Agreement" means a Security Agreement,
         satisfactory to the Lender in its sole discretion, executed by a
         Guarantor and delivered to the Lender.

                  "Guarantors" means the Domestic Guarantors, the Foreign
         Guarantors and any other Person now or hereafter guaranteeing payment
         of any of the Obligations.

                  "Hazardous Substance" has the meaning given in Section 5.14.

                  "Hedging Obligations" means the obligations of any Person
         under (i) interest rate swap agreements, interest rate cap agreements
         and interest rate collar agreements and (ii) other agreements or
         arrangements designed to protect such Person against fluctuations in
         interest rates or the value of foreign currencies.

                  "Indenture" means that certain Indenture dated as of July 20,
         1998 by and among the Parent Borrower, certain Subsidiaries and Chase
         Bank of Texas, National Association.

                  "Interest Period" means, relative to any Eurodollar Advance,
         the period beginning on (and including) the date on which such
         Eurodollar Advance is made, or continued as, or converted into, a
         Eurodollar Advance pursuant to Sections 2.7, 2.8 or 2.9 and shall end
         on (but exclude) the day which numerically corresponds to such date one
         (1), two (2), three (3) or six (6) months thereafter (or, if such month
         has no numerically corresponding day, on the last Eurodollar Business
         Day of such month), as the Parent Borrower may select in the relevant
         notice pursuant to Sections 2.7, 2.8, or 2.9; provided, however, that:




                                      -9-

Eagle Geophysical Credit Agreement 

<PAGE>   14
                           (a) no more than three (3) different Interest Periods
                  may be outstanding at any one time;

                           (b) if an Interest Period would otherwise end on a
                  day which is not a Banking Day, such Interest Period shall end
                  on the next following Banking Day (unless such next following
                  Banking Day is the first Banking Day of a month, in which case
                  such Interest Period shall end on the next preceding Banking
                  Day);

                           (c) no Interest Period may end later than the
                  Maturity Date; and

                           (d) in no event shall the Parent Borrower select
                  Interest Periods with respect to Eurodollar Advances which
                  would require payment of funding losses under Section 2.11.

                  "Inventory" means, as to any Person, all of that Person's
         inventory, as such term is defined in the UCC, whether now owned or
         hereafter acquired, whether consisting of whole goods, spare parts or
         components, supplies or materials, whether acquired, held or furnished
         for sale, for lease or under service contracts or for manufacture or
         processing, and wherever located.

                  "Investment Property" means, as to any Person, all of that
         Person's investment property, as such term is defined in the UCC,
         whether now owned or hereafter acquired, including but not limited to
         all securities, security entitlements, securities accounts, commodity
         contracts, commodity accounts, stocks, bonds, mutual fund shares, money
         market shares and U.S. Government securities.

                  "Issuer" means the issuer of any Letter of Credit.

                  "L/C Amount" means the sum of (i) the aggregate face amount of
         any issued and outstanding Letters of Credit and (ii) the unpaid amount
         of the Obligation of Reimbursement.

                  "L/C Application" means an application and agreement for
         letters of credit in a form acceptable to the Issuer and the Lender.

                  "Letter of Credit" has the meaning specified in Section 2.3.

                  "Lien" means, as to any Person (i) any mortgage, deed of
         trust, pledge, lien, security interest, adverse claim, title retention
         agreement, assignment, transfer or other charge or encumbrance of any
         nature under the laws of any jurisdiction intended to grant or reserve
         an interest in property to secure an obligation, including without
         limitation any bid, payment or performance bond and (ii) covenants,
         restrictions, rights, easements and irregularities in that Person's
         title to any asset.

                  "Loan Documents" means this Agreement, the Note and the
         Security Documents.




                                      -10-
Eagle Geophysical Credit Agreement 
<PAGE>   15

                  "Lockbox" has the meaning given in the Lockbox Agreement.

                  "Lockbox Agreement" means the Lockbox Agreement by and among
         the Borrowers, Wells Fargo and the Lender, of even date herewith.

                  "Margin" means, with respect to computation of the Eurodollar
         Rate, the Floating Rate and the unused line fee described in Section
         2.15(b), the applicable increment (expressed in basis points) set forth
         and described in the table below:

<TABLE>
<CAPTION>
                      Floating          Eurodollar          unused line
                        Rate               Rate                 fee
                      ---------         ----------          -----------
<S>                                     <C>                 <C>
                        37.5                275                 50
</TABLE>



         provided, however, that if the Parent Borrower's Consolidated Net
         Income for any of fiscal 1999, 2000 or 2001 is greater than or equal to
         $2,000,000, such increments (expressed in basis points) shall be:

<TABLE>
<CAPTION>
                      Floating          Eurodollar          unused line
                        Rate               Rate                 fee
                      ---------         ----------          -----------
<S>                                     <C>                 <C>
                          0                 225                  38
</TABLE>


                  "Maturity Date" means March 26, 2002.

                  "Maximum Line" means $20,000,000 unless said amount is reduced
         pursuant to Section 2.19, in which event it means such reduced amount.

                  "Multi-Client Survey" means a seismic survey whereby the
         Parent Borrower or a Restricted Subsidiary acquires certain seismic
         data in which it directly or indirectly retains ownership rights,
         revenue interests or similar interests in the future economic benefits
         thereof and which data is to be licensed to customers on a
         non-transferable, non-exclusive basis.

                  "Note" means the Revolving Note.

                  "Obligations" means the Note and each and every other debt,
         liability and obligation of every type and description which any
         Borrower may now or at any time hereafter owe to the Lender, whether
         such debt, liability or obligation now exists or is hereafter created
         or incurred, whether it arises in a transaction involving the Lender
         alone or in a transaction involving other creditors of a Borrower, and
         whether it is direct or indirect, due or to become due, absolute or
         contingent, primary or secondary, liquidated or unliquidated, or sole,
         joint, several or joint and several, and including specifically, but
         not limited to, the Obligation of Reimbursement and all indebtedness




                                      -11-

Eagle Geophysical Credit Agreement 
<PAGE>   16

         of each Borrower arising under this Agreement, the Note, any L/C
         Application completed by a Borrower, or any other loan or credit
         agreement or guaranty between a Borrower and the Lender, whether now in
         effect or hereafter entered into.

                  "Obligation of Reimbursement" has the meaning given in Section
         2.4(a).

                  "Permitted Lien" has the meaning given in Section 7.1.

                  "Person" means any individual, corporation, partnership, joint
         venture, limited liability company, association, joint-stock company,
         trust, unincorporated organization or government or any agency or
         political subdivision thereof.

                  "Plan" means an employee benefit plan or other plan maintained
         for any Borrower's employees and covered by Title IV of ERISA.

                  "Pledge Agreement" means the Collateral Pledge Agreement of
         even date herewith by the Parent Borrower in favor of the Lender, as
         the same may hereafter be amended, supplemented or restated from time
         to time.

                  "Preferred Stock" means, with respect to any Person, any and
         all shares, interests, participations or other equivalents (however
         designated) of such Person's preferred or preference stock, whether now
         outstanding or issued after the date hereof, and including, without
         limitation, all classes and series of preferred or preference stock of
         such Person.

                   "Premises" means all premises where any Borrower conducts its
         business and has any rights of possession, including (without
         limitation) the premises legally described in Exhibit F attached
         hereto.

                  "Receivables" means, as to any Person, each and every right of
         that Person to the payment of money, whether such right to payment now
         exists or hereafter arises, whether such right to payment arises out of
         a sale, lease or other disposition of goods or other property, out of a
         rendering of services, out of a loan, out of the overpayment of taxes
         or other liabilities, or otherwise arises under any contract or
         agreement, whether such right to payment is created, generated or
         earned by that Person or by some other person who subsequently
         transfers such person's interest to that Person, whether such right to
         payment is or is not already earned by performance, and howsoever such
         right to payment may be evidenced, together with all other rights and
         interests (including all Liens) which that Person may at any time have
         by law or agreement against any account debtor or other obligor
         obligated to make any such payment or against any property of such
         account debtor or other obligor; all including but not limited to all
         present and future accounts, contract rights, loans and obligations
         receivable, chattel papers, bonds, notes and other debt instruments,
         tax refunds and rights to payment in the nature of general intangibles.

                  "Reportable Event" shall have the meaning assigned to that
         term in Title IV of ERISA.





                                      -12-
Eagle Geophysical Credit Agreement 
<PAGE>   17

                  "Restricted Subsidiary" means any Subsidiary other than an
         Unrestricted Subsidiary.

                  "Revolving Advance" has the meaning given in Section 2.1.

                  "Revolving Note" means the Borrowers' revolving promissory
         note, payable to the order of the Lender in substantially the form of
         Exhibit A hereto and any note or notes issued in substitution therefor,
         as the same may hereafter be amended, supplemented or restated from
         time to time.

                  "Security Documents" means this Agreement, the Collateral
         Account Agreement, the Lockbox Agreement, the Pledge Agreement and any
         other document delivered by a Borrower to the Lender from time to time
         to secure the Obligations, as the same may hereafter be amended,
         supplemented or restated from time to time.

                  "Security Interest" has the meaning given in Section 3.1.

                  "Seitel" means Seitel, Inc., a Delaware corporation.

                  "Seitel Group" means Seitel and its Affiliates.

                  "Seitel No Offset Agreement" means that certain letter
         agreement by Seitel in favor of the Lender dated as of March 26, 1999.

                  "Senior Notes" means the Parent Borrower's 10 3/4% Senior
         Notes (Series B) due 2008, and any debt instruments replacing or
         refinancing such notes.

                  "Ships" means the seismic data acquisition vessels currently
         named "Austral Horizon" and "Atlantic Horizon".

                  "Special Account" means a specified cash collateral account
         maintained by a financial institution acceptable to the Lender in
         connection with Letters of Credit, as contemplated by Section 2.5.

                  "Subsidiary" means any corporation of which more than 50% of
         the outstanding shares of capital stock having general voting power
         under ordinary circumstances to elect a majority of the board of
         directors of such corporation, irrespective of whether or not at the
         time stock of any other class or classes shall have or might have
         voting power by reason of the happening of any contingency, is at the
         time directly or indirectly owned by a Borrower, by a Borrower and one
         or more other Subsidiaries, or by one or more other Subsidiaries.

                  "Tangible Net Worth" means, for any Person, the difference
         between (i) the tangible assets of that Person, which, in accordance
         with GAAP are tangible assets, after deducting adequate reserves in
         each case where, in accordance with GAAP, a 




                                      -13-
Eagle Geophysical Credit Agreement 
<PAGE>   18

         reserve is proper and (ii) all Debt of that Person; provided, however,
         that notwithstanding the foregoing in no event shall there be included
         as such tangible assets patents, trademarks, trade names, copyrights,
         licenses, goodwill, receivables from Affiliates, directors, officers or
         employees, prepaid expenses, deposits, deferred charges or treasury
         stock or any securities or Debt of that Person or any other securities
         unless the same are readily marketable in the United States of America
         or entitled to be used as a credit against federal income tax
         liabilities, and any other assets designated from time to time by the
         Lender, in its sole discretion.

                  "Termination Date" means the earliest of (i) the Maturity
         Date, (ii) the date the Borrowers terminate the Credit Facility, or
         (iii) the date the Lender demands payment of the Obligations after an
         Event of Default pursuant to Section 8.2.

                  "UCC" means the Uniform Commercial Code as in effect from time
         to time in the state designated in Section 9.13 as the state whose laws
         shall govern this Agreement, or in any other state whose laws are held
         to govern this Agreement or any portion hereof.

                  "Unrestricted Subsidiary" means (a) any Subsidiary that is
         designated by the Board of Directors of the Parent Borrower as an
         Unrestricted Subsidiary in accordance with Section 1018 of the
         Indenture and (b) any Subsidiary of an Unrestricted Subsidiary.

                  "Voting Stock" means any class or classes of Capital Stock
         pursuant to which the holders thereof have the general voting power
         under ordinary circumstances to elect at least a majority of the board
         of directors, managers or trustees of any Person (irrespective of
         whether or not, at the time, stock of any other class or classes has,
         or might have, voting power by reason of the happening of any
         contingency).

                  "Wells Fargo" means Wells Fargo Bank, N.A.

                  Section 1.2 Cross References. All references in this Agreement
         to Articles, Sections and subsections, shall be to Articles, Sections
         and subsections of this Agreement unless otherwise explicitly
         specified.

                                   ARTICLE II

                     AMOUNT AND TERMS OF THE CREDIT FACILITY

                  Section 2.1 Revolving Advances. The Lender agrees, on the
terms and subject to the conditions herein set forth, to make advances to the
Borrowers from time to time from the date all of the conditions set forth in
Section 4.1 are satisfied (the "Funding Date") to the Termination Date (the
"Revolving Advances"). The Lender shall have no obligation to make a Revolving
Advance to the extent the amount of such Revolving Advance exceeds Availability.
The Borrowers' obligation to pay the Revolving Advances shall be evidenced by
the Revolving Note and shall be secured by the Collateral as provided in Article
III and




                                      -14-
Eagle Geophysical Credit Agreement 

<PAGE>   19

the Security Documents. Within the limits set forth in this Section 2.1, the
Borrowers may borrow, prepay pursuant to Section 2.19 and reborrow.

                  Section 2.2 Foreign Accounts. The Borrowers may request that
the Lender include in the Borrowing Base certain Accounts owed to the Borrowers
by Account debtors located outside the United States. The Lender agrees to
review any such request and provided the Lender's senior management approves
such request, such Accounts satisfy certain underwriting criteria and an
appropriate amendment to this Agreement is executed and delivered, a portion of
such accounts will be added to the Borrowing Base.

                  Section 2.3 Letters of Credit.

                  (a) The Lender agrees, on the terms and subject to the
         conditions herein set forth, to cause an Issuer to issue, from the
         Funding Date to the Termination Date, one or more irrevocable standby
         or documentary letters of credit (each, a "Letter of Credit") for the
         Borrowers' account. The Lender shall have no obligation to cause an
         Issuer to issue any Letter of Credit if the face amount of the Letter
         of Credit to be issued would exceed the lesser of:

                           (i) $5,000,000 less the L/C Amount, or

                           (ii) the Borrowing Base less the sum of (A) all
                  outstanding and unpaid Revolving Advances and (B) the L/C
                  Amount.

         Each Letter of Credit, if any, shall be issued pursuant to a separate
         L/C Application entered into by the applicable Borrower and the Lender
         for the benefit of the Issuer, completed in a manner satisfactory to
         the Lender and the Issuer. The terms and conditions set forth in each
         such L/C Application shall supplement the terms and conditions hereof,
         but if the terms of any such L/C Application and the terms of this
         Agreement are inconsistent, the terms hereof shall control.

                  (b) No Letter of Credit shall be issued with an expiry date
         later than the Termination Date in effect as of the date of issuance.

                  (c) Any request to cause an Issuer to issue a Letter of Credit
         under this Section 2.3 shall be deemed to be a representation by the
         Borrowers that the conditions set forth in Section 4.4 have been
         satisfied as of the date of the request.

                  Section 2.4 Payment of Amounts Drawn Under Letters of Credit;
Obligation of Reimbursement. The Borrowers acknowledge that the Lender, as
co-applicant, will be liable to the Issuer for reimbursement of any and all
draws under Letters of Credit and for all other amounts required to be paid
under the applicable L/C Application. Accordingly, the Borrowers shall pay to
the Lender any and all amounts required to be paid under the applicable L/C
Application, when and as required to be paid thereby, and the amounts designated
below, when and as designated:

                  (a) The Borrowers shall pay the Lender on the day a draft is
         honored under






                                      -15-
Eagle Geophysical Credit Agreement 
<PAGE>   20

         any Letter of Credit a sum equal to all amounts drawn under such Letter
         of Credit plus any and all reasonable charges and expenses that the
         Issuer or the Lender may pay or incur relative to such draw and the
         applicable L/C Application, plus interest on all such amounts, charges
         and expenses as set forth below (the Borrowers' obligation to pay all
         such amounts is herein referred to as the "Obligation of
         Reimbursement").

                  (b) Whenever a draft is submitted under a Letter of Credit,
         the Lender shall make a Revolving Advance in the amount of the
         Obligation of Reimbursement and shall apply the proceeds of such
         Revolving Advance thereto. Such Revolving Advance shall be repayable in
         accordance with and be treated in all other respects as a Revolving
         Advance hereunder.

                  (c) If a draft is submitted under a Letter of Credit when the
         Borrowers are unable, because a Default Period then exists or for any
         other reason, to obtain a Revolving Advance to pay the Obligation of
         Reimbursement, the Borrowers shall pay to the Lender on demand and in
         immediately available funds, the amount of the Obligation of
         Reimbursement together with interest, accrued from the date of the
         draft until payment in full at the Default Rate. Notwithstanding the
         Borrowers' inability to obtain a Revolving Advance for any reason, the
         Lender is irrevocably authorized, in its sole discretion, to make a
         Revolving Advance in an amount sufficient to discharge the Obligation
         of Reimbursement and all accrued but unpaid interest thereon.

                  (d) The Borrowers' obligation to pay any Revolving Advance
         made under this Section 2.4, shall be evidenced by the Revolving Note
         and shall bear interest as provided in Section 2.14.

                  Section 2.5 Special Account. If the Credit Facility is
terminated for any reason whatsoever while any Letter of Credit is outstanding,
the Borrowers shall thereupon pay the Lender in immediately available funds for
deposit in the Special Account an amount equal to the L/C Amount. The Special
Account shall be an interest bearing account maintained for the Lender by any
financial institution acceptable to the Lender. Any interest earned on amounts
deposited in the Special Account shall be credited to the Special Account.
Amounts on deposit in the Special Account may be applied by the Lender at any
time or from time to time to the Obligations in the Lender's sole discretion,
and shall not be subject to withdrawal by the Borrowers so long as the Lender
maintains a security interest therein. The Lender agrees to transfer any balance
in the Special Account to the Borrowers at such time as the Lender is required
to release its security interest in the Special Account under applicable law.

                  Section 2.6 Obligations Absolute. The Borrowers' obligations
arising under Section 2.4 shall be absolute, unconditional and irrevocable, and
shall be paid strictly in accordance with the terms of Section 2.4, under all
circumstances whatsoever, including (without limitation) the following
circumstances:

                  (a) any lack of validity or enforceability of any Letter of
         Credit or any other agreement or instrument relating to any Letter of
         Credit (collectively the "Related Documents");




                                      -16-

Eagle Geophysical Credit Agreement
<PAGE>   21


                  (b) any amendment or waiver of or any consent to departure
         from all or any of the Related Documents;

                  (c) the existence of any claim, setoff, defense or other right
         which any Borrower may have at any time, against any beneficiary or any
         transferee of any Letter of Credit (or any persons or entities for whom
         any such beneficiary or any such transferee may be acting), or other
         person or entity, whether in connection with this Agreement, the
         transactions contemplated herein or in the Related Documents or any
         unrelated transactions;

                  (d) any statement or any other document presented under any
         Letter of Credit proving to be forged, fraudulent, invalid or
         insufficient in any respect or any statement therein being untrue or
         inaccurate in any respect whatsoever;

                  (e) payment by or on behalf of the Issuer or the Lender under
         any Letter of Credit against presentation of a draft or certificate
         which does not strictly comply with the terms of such Letter of Credit;
         or

                  (f) any other circumstance or happening whatsoever, whether or
         not similar to any of the foregoing.

                  Section 2.7 Procedures for Borrowing.

                  (a) Each Advance that the Lender makes shall be funded as
         either a Floating Rate Advance or a Eurodollar Advance, as the Parent
         Borrower shall specify in the related notice of borrowing or notice of
         conversion pursuant to this Section 2.7 or Section 2.8, provided that
         during Default Periods, no Eurodollar Advances shall be made. Floating
         Rate Advances and Eurodollar Advances may be outstanding at the same
         time. It is understood, however, that in the case of a Eurodollar
         Advance, the principal amount of the Advance shall be in an amount
         equal to $500,000 or a higher integral multiple of $100,000.

                  (b) The Parent Borrower shall request each Advance not later
         than 11:00 a.m., San Antonio, Texas time, on a Banking Day which, in
         the case of a Floating Rate Advance, is the Advance date, or, in the
         case of a Eurodollar Advance, is at least three (3) Banking Days before
         the date the Advance is to be made. Each such request shall be
         effective upon receipt by the Lender, shall be in writing or by
         telephone or telecopy transmission, to be confirmed in writing by the
         Parent Borrower if so requested by the Lender (in the form of Exhibit
         B), shall be by (i) an officer of the Parent Borrower; or (ii) a person
         designated as the Parent Borrower's agent by an officer of the Parent
         Borrower in a writing delivered to the Lender; or (iii) a person whom
         the Lender reasonably believes to be an officer of the Parent Borrower
         or such a designated agent, and shall specify whether the Advance is to
         bear interest initially at a Floating Rate or a Eurodollar Rate, and in
         the case of an Advance that is to bear interest initially at a
         Eurodollar Rate, shall specify the Interest Period to be applicable
         thereto.



                                      -17-
Eagle Geophysical Credit Agreement
<PAGE>   22

                  (c) The Borrowers shall repay all Advances even if the Lender
         does not receive such confirmation and even if the person requesting an
         Advance was not in fact authorized to do so. Any request for an
         Advance, whether written or telephonic, shall be deemed to be a
         representation by the Borrowers that the conditions set forth in
         Section 4.4 have been satisfied as of the time of the request.

                  Section 2.8 Converting Floating Rate Advances to Eurodollar
Advances; Procedures. So long as no Default Period exists, the Parent Borrower
may convert all or any part of any outstanding Floating Rate Advance into a
Eurodollar Advance by giving notice to the Lender of such conversion not later
than 11:00 a.m., San Antonio, Texas time, on a Banking Day which is at least
three (3) Banking Days before the date of the requested conversion. Each such
notice shall be effective upon receipt by the Lender, shall be in writing or by
telephone or telecopy transmission, to be confirmed in writing by the Parent
Borrower if so requested by the Lender (in the form of Exhibit C), shall specify
the date and amount of such conversion, the total amount of the Advance to be so
converted and the Interest Period therefor. Each conversion of an Advance shall
be on a Banking Day, and the aggregate amount of each such conversion of a
Floating Rate Advance to a Eurodollar Advance shall be in an amount equal to
$500,000 or a higher integral multiple of $100,000.

                  Section 2.9 Procedures at End of a Interest Period. Unless the
Parent Borrower requests a new Eurodollar Advance in accordance with the
procedures set forth below, or prepays the principal of an outstanding
Eurodollar Advance at the expiration of a Interest Period, the Lender shall
automatically and without request of the Borrowers convert each Eurodollar
Advance to a Floating Rate Advance on the last day of the relevant Interest
Period. So long as no Default Period shall exist, the Parent Borrower may cause
all or any part of any outstanding Eurodollar Advance to continue to bear
interest at a Eurodollar Rate after the end of the then applicable Interest
Period by notifying the Lender not later than 10:30 a.m., San Antonio, Texas
time, on a Banking Day which is at least three (3) Banking Days prior to the
first day of the new Interest Period. Each such notice shall be in writing or by
telephone or telecopy transmission, to be confirmed in writing by the Parent
Borrower if so requested by the Lender (in the form of Exhibit D), shall be
effective when received by the Lender, and shall specify the first day of the
applicable Interest Period, the amount of the expiring Eurodollar Advance to be
continued and the Interest Period therefor. Each new Interest Period shall begin
on a Banking Day and the amount of each Advance bearing a new Eurodollar Rate
shall be in an amount equal to $500,000 or a higher integral multiple of
$100,000.

                  Section 2.10 Setting and Notice of Rates. The applicable
Eurodollar Rate for each Interest Period shall be determined by the Lender
between the opening of business and 12:00 Noon, San Antonio Texas time, on the
second Banking Day before the beginning of such Interest Period, whereupon
notice thereof (which may be by telephone) shall be given by the Lender to the
Parent Borrower. Each such determination of the applicable Eurodollar Rate shall
be conclusive and binding upon the parties hereto, in the absence of
demonstrable error. The Lender, upon written request of the Parent Borrower,
shall deliver to the Parent Borrower a statement showing the computations used
by the Lender in determining the applicable Eurodollar Rate.





                                      -18-
Eagle Geophysical Credit Agreement
<PAGE>   23

                  Section 2.11 Funding Losses. The Borrowers shall, upon demand
by the Lender (which demand shall be accompanied by a statement setting forth
the basis for the calculations of the amount being claimed), indemnify the
Lender against any loss or expense which the Lender may have sustained or
incurred (including, without limitation, any net loss or expense incurred by
reason of the liquidation or reemployment of deposits or other funds acquired by
the Lender to fund or maintain Eurodollar Advances) or which the Lender may be
deemed to have sustained or incurred, as reasonably determined by the Lender,
(a) as a consequence of any failure by the Borrowers to make any payment when
due of any amount due hereunder in connection with any Eurodollar Advances, (b)
due to any failure of the Borrowers to borrow or convert any Eurodollar Advances
on a date specified therefor in a notice thereof or (c) due to any payment or
prepayment of any Eurodollar Advance on a date other than the last day of the
applicable Interest Period for such Eurodollar Advance. For this purpose, all
notices under Sections 2.7, 2.8, or 2.9 shall be deemed to be irrevocable.

                  Section 2.12 Right of Lender to Fund through Other Offices.
The Lender may fulfill its agreements hereunder with respect to any Eurodollar
Advance by causing a foreign branch or affiliate of the Lender to make such
Eurodollar Advance; provided, that in such event the obligation of the Borrowers
to repay such Eurodollar Advance shall nevertheless be to the Lender and such
Eurodollar Advance shall be deemed held by the Lender for the account of such
branch or affiliate.

                  Section 2.13 Discretion of Lender as to Manner of Funding.
Notwithstanding any provision of this Agreement to the contrary, the Lender
shall be entitled to fund and maintain all or any part of its Eurodollar
Advances in any manner it deems fit, provided, however, that for the purposes of
this Agreement (specifically including, without limitation, Section 2.11) all
determinations hereunder shall be made as if the Lender had actually funded and
maintained each Eurodollar Advance during each Interest Period for such
Eurodollar Advance through the purchase of deposits having a maturity
corresponding to such Interest Period and bearing an interest rate equal to the
appropriate Eurodollar Rate for such Interest Period.

                  Section 2.14 Interest; Default Interest; Participations;
         Usury.

                  (a) FLOATING RATE ADVANCES. Except as set forth in Sections
         2.14(c) and 2.14(e), the outstanding principal balance of Floating Rate
         Advances shall bear interest at the Floating Rate.

                  (b) EURODOLLAR RATE ADVANCES. Except as set forth in Sections
         2.14(c) and 2.14(e), the outstanding principal balance of Eurodollar
         Rate Advances shall bear interest at the Eurodollar Rate.

                  (c) DEFAULT INTEREST RATE. At any time during any Default
         Period, in the Lender's sole discretion and without waiving any of its
         other rights and remedies, the principal of the Advances outstanding
         from time to time shall bear interest at the 




                                      -19-
Eagle Geophysical Credit Agreement
<PAGE>   24

         Default Rate, effective for any periods during that Default Period
         designated by the Lender from time to time.

                  (d) PARTICIPATIONS. If any Person shall acquire a
         participation in the Advances or the Obligation of Reimbursement, the
         Borrowers shall, nevertheless, pay the full amount of all interest
         calculated under this Section 2.14, along with all other fees, charges
         and other amounts due under this Agreement, regardless if such Person
         elects to accept interest with respect to its participation at a lower
         rate than the Floating Rate, or otherwise elects to accept less than
         its prorata share of such fees, charges and other amounts due under
         this Agreement.

                  (e) USURY. In no event shall any interest rate provided for in
         this Agreement or the Note exceed the maximum rate permitted by the
         then applicable law. It is the intention of the parties hereto to
         strictly comply with applicable usury laws; accordingly, it is agreed
         that, notwithstanding any provision to the contrary in this Agreement,
         in the Notes, or in the other Loan Documents, in no event shall this
         Agreement, the Note, or the other Loan Documents be construed to
         charge, contract for or require the payment or permit the collection of
         interest in excess of the maximum amount permitted by applicable law.
         If any such excess interest is contracted for, charged or received
         under this Agreement, the Note or the other Loan Documents, or in the
         event that all of the principal balance shall be prepaid, so that under
         any of such circumstances the amount of interest contracted for,
         charged or received on the principal balance shall exceed the maximum
         amount of interest permitted by applicable law, then in such event (i)
         the provisions of this Section 2.14(e) shall govern and control, (ii)
         neither the Borrowers nor any other person or entity now or hereafter
         liable for the payment thereof shall be obligated to pay the amount of
         such interest to the extent that it is in excess of the maximum amount
         of interest permitted by applicable law, (iii) any such excess which
         may have been collected shall be either applied as a credit against the
         then unpaid principal balance or refunded to the Borrowers, at the
         option of the Lender, and (iv) the effective rate of interest shall be
         automatically reduced to the maximum lawful contract rate allowed under
         applicable law as now or hereafter construed by the courts having
         jurisdiction thereof. It is further agreed that without limitation of
         the foregoing, all calculations of the rate of interest contracted for,
         charged or received under this Agreement, the Note and the other Loan
         Documents which are made for the purpose of determining whether such
         rate exceeds the maximum lawful contract rate, shall be made, to the
         extent permitted by applicable law, by amortizing, prorating,
         allocating and spreading in equal parts during the period of the full
         stated term of the indebtedness evidenced hereby, all from the
         Borrowers or otherwise by the Lender in connection with such
         indebtedness; provided, however, that if any applicable state law is
         amended or the law of the United States of America preempts any
         applicable state law, so that it becomes lawful for the Lender to
         receive a greater simple interest per annum rate than is presently
         allowed, the Borrowers agree that, on the effective date of such
         amendment or preemption as the case may be, the lawful maximum
         hereunder shall be increased to the maximum simple interest per annum
         rate allowed by the higher of the amended state law or the law of the
         United States of America.



                                      -20-

Eagle Geophysical Credit Agreement 
<PAGE>   25

                  Section 2.15 Fees.

                  (a) ORIGINATION FEE. The Borrowers shall pay the Lender a
         fully earned and non-refundable origination fee of $50,000, due and
         payable upon the execution of this Agreement. The Lender acknowledges
         receipt of $50,000 toward payment of this fee and the fees, costs and
         expenses described in Sections 2.15(f) and 9.6.

                  (b) UNUSED LINE FEE. For the purposes of this Section 2.15(b),
         "Unused Amount" means the Maximum Line reduced by (1) outstanding
         Revolving Advances and (2) the L/C Amount. The Borrowers shall pay to
         the Lender an unused line fee equal to the Margin on the average daily
         Unused Amount from the date of this Agreement to and including the
         Termination Date, due and payable monthly in arrears on the first day
         of the month and on the Termination Date.

                  (c) FAILED CLEAN UP FEE. If during any Clean Up Period, the
         sum of the outstanding principal balance of the Note and the L/C Amount
         is greater than zero, the Borrowers shall pay the Lender a fee equal to
         one half of one percent (0.5%) of the sum of the average outstanding
         principal balance of the Note and the L/C Amount during the calendar
         year in which such Clean Up Period occurs, which fee shall be due and
         payable on the earlier of January 1st of the following year or the
         Termination Date. "Clean Up Period" means any period of thirty
         consecutive days in each calendar year.

                  (d) LETTER OF CREDIT FEES. The Borrowers shall pay the Lender
         a fee with respect to each Letter of Credit, if any, accruing on a
         daily basis and computed at the annual rate of two and one half percent
         (2.5%) of the aggregate amount that may then be drawn on all issued and
         outstanding Letters of Credit assuming compliance with all conditions
         for drawing thereunder (the "Aggregate Face Amount"), from and
         including the date of issuance of such Letter of Credit until such date
         as such Letter of Credit shall terminate by its terms or be returned to
         the Lender, due and payable monthly in arrears on the first day of each
         month and on the Termination Date; provided, however that during
         Default Periods, in the Lender's sole discretion and without waiving
         any of its other rights and remedies, such fee shall increase to four
         and one half percent (4.5%) of the Aggregate Face Amount. The foregoing
         fee shall be in addition to any and all fees, commissions and charges
         of any Issuer of a Letter of Credit with respect to or in connection
         with such Letter of Credit.

                  (e) LETTER OF CREDIT ADMINISTRATIVE FEES. The Borrowers shall
         pay the Lender, on written demand, the administrative fees charged by
         the Issuer in connection with the honoring of drafts under any Letter
         of Credit, amendments thereto, transfers thereof and all other activity
         with respect to the Letters of Credit at the then-current rates
         published by the Issuer for such services rendered on behalf of
         customers of the Issuer generally.





                                      -21-
Eagle Geophysical Credit Agreement 
<PAGE>   26

                  (f) AUDIT FEES. The Borrowers shall pay the Lender, on demand,
         audit fees in connection with any audits or inspections conducted by
         the Lender of any Collateral or the Borrowers' operations or business
         at the rates established from time to time by the Lender as its audit
         fees (which fees are $600 per day per auditor), together with all
         actual out-of-pocket costs and expenses incurred in conducting any such
         audit or inspection.

                  Section 2.16 Computation of Interest and Fees; When Interest
Due and Payable. Fees hereunder and interest accruing on the outstanding
principal balance of the Advances and the Obligation of Reimbursement
outstanding from time to time shall be computed on the basis of actual number of
days elapsed in a year of 360 days. Interest on Floating Rate Advances shall be
payable in arrears on the first day of each month and on the Termination Date.
Accrued interest on each Eurodollar Advance shall be due and payable on the last
day of the Interest Period relating to such Eurodollar Advance; provided,
however, that if any Interest Period is longer than three (3) months, interest
shall be due and payable monthly in arrears on the last day of the third month
occurring after commencement of such Interest Period, on the last day of each
three month period thereafter (if any) and on the last day of such Interest
Period.

                  Section 2.17 Increased Costs on Eurodollar Advances; Capital
Adequacy; Increased Costs and Reduced Return.

                  (a) INCREASED COSTS ON EURODOLLAR ADVANCES. If Regulation D of
         the Board of Governors of the Federal Reserve System or after the date
         of this Agreement the adoption of any applicable law, rule or
         regulation, or any change in any existing law, or any change in the
         interpretation or administration thereof by any governmental authority,
         central bank or comparable agency charged with the interpretation or
         administration thereof, or compliance by the Lender with any request or
         directive (whether or not having the force of law) of any such
         authority, central bank or comparable agency, shall:

                           (i) subject the Lender to or cause the withdrawal or
                  termination of any exemption previously granted to the Lender
                  with respect to, any tax, duty or other charge with respect to
                  Eurodollar Advances or its obligation to make Eurodollar
                  Advances, or shall change the basis of taxation of payments to
                  the Lender of the principal of or interest under this
                  Agreement in respect of its Eurodollar Advances or its
                  obligation to make Eurodollar Advances (except for changes in
                  the rate of tax on the overall net income of the Lender
                  imposed by the jurisdictions in which the Lender's principal
                  executive office is located); or

                           (ii) impose, modify or deem applicable any reserve
                  (including, without limitation, any reserve imposed by the
                  Board of Governors of the Federal Reserve System, but
                  excluding any reserve included in the determination of
                  interest rates pursuant to Section 2.10), special deposit or
                  similar requirement against assets of, deposits with or for
                  the account of, or credit extended by, the Lender; or


                                      -22-
Eagle Geophysical Credit Agreement 
<PAGE>   27


                           (iii) impose on the Lender any other condition
                  affecting its making, maintaining or Advance of Eurodollar
                  Advances or its obligation to make Eurodollar Advances;

         and the result of any of the foregoing is to increase the cost to the
         Lender of making or maintaining any Eurodollar Advance, or to reduce
         the amount of any sum received or receivable by the Lender under this
         Agreement or under the Note with respect to a Eurodollar Advance, then
         the Lender will notify the Parent Borrower of such increased cost and
         within fifteen (15) days after demand by the Lender (which demand shall
         be accompanied by a statement setting forth the basis of such demand)
         the Borrowers shall pay to the Lender such additional amount or amounts
         as will compensate the Lender for such increased cost or such
         reduction. The Lender will promptly notify the Parent Borrower of any
         event of which it has knowledge, occurring after the date hereof, which
         will entitle the Lender to compensation pursuant to this Section 2.17.
         If the Parent Borrower receives notice from the Lender of any event
         which will entitle the Lender to compensation pursuant to this Section
         2.17, the Borrowers may prepay any then outstanding Eurodollar Advances
         or notify the Lender that any pending request for a Eurodollar Advance
         shall be deemed to be a request for a Floating Rate Advance, in each
         case subject to the provisions of Section 2.11.

                  (b) CAPITAL ADEQUACY. If any Related Lender determines at any
         time that its Return has been reduced as a result of any Rule Change,
         such Related Lender may require the Borrowers to pay it the amount
         necessary to restore its Return to what it would have been had there
         been no Rule Change. For purposes of this Section 2.17(b):

                           (i) "Capital Adequacy Rule" means any law, rule,
                  regulation, guideline, directive, requirement or request
                  regarding capital adequacy, or the interpretation or
                  administration thereof by any governmental or regulatory
                  authority, central bank or comparable agency, whether or not
                  having the force of law, that applies to any Related Lender.
                  Such rules include rules requiring financial institutions to
                  maintain total capital in amounts based upon percentages of
                  outstanding loans, binding loan commitments and letters of
                  credit.

                           (ii) "Eurodollar Rule" means Regulation D of the
                  Board of Governors of the Federal Reserve System, any
                  applicable law, rule or regulation, with respect to (A) taxes,
                  duties or other charges, exemptions with respect to Eurodollar
                  Advances or the Lender's obligation to make Eurodollar
                  Advances, and (B) reserves imposed by the Board of Governors
                  of the Federal Reserve System (but excluding any reserve
                  included in the determination of interest rates pursuant to
                  Section 2.10), special deposits or similar requirements
                  against assets of, deposits with or for the account of, or
                  credit extended by, any Related Lender, and any other
                  condition affecting the




                                      -23-
Eagle Geophysical Credit Agreement 
<PAGE>   28

                  Lender's making, maintaining or funding of Eurodollar Advances
                  or its obligation to make Eurodollar Advances.

                           (iii) "L/C Rule" means any law, rule, regulation,
                  guideline, directive, requirement or request regarding letters
                  of credit, or the interpretation or administration thereof by
                  any governmental or regulatory authority, central bank or
                  comparable agency, whether or not having the force of law,
                  that applies to any Related Lender. Such rules include rules
                  imposing taxes, duties or other similar charges, or mandating
                  reserves, special deposits or similar requirements against
                  assets of, deposits with or for the account of, or credit
                  extended by any Related Lender, on letters of credit.

                           (iv) "Related Lender" includes (but is not limited
                  to) the Lender, the Issuer, any parent corporation of the
                  Lender or the Issuer and any assignee of any interest of the
                  Lender hereunder and any participant in the loans made
                  hereunder.

                           (v) "Return", for any period, means the return as
                  determined by a Related Lender on the Advances and Letters of
                  Credit based upon its total capital requirements and a
                  reasonable attribution formula that takes account of the
                  Capital Adequacy Rules, Eurodollar Rules, and L/C Rules then
                  in effect, costs of issuing or maintaining any Eurodollar
                  Advance or Letter of Credit and amounts received or receivable
                  under this Agreement or the Note with respect to any
                  Eurodollar Advance or Letter of Credit. Return may be
                  calculated for each calendar quarter and for the shorter
                  period between the end of a calendar quarter and the date of
                  termination in whole of this Agreement.

                           (vi) "Rule Change" means any change in any Capital
                  Adequacy Rule, Eurodollar Rule, or L/C Rule occurring after
                  the date of this Agreement, but the term does not include any
                  changes in applicable requirements that at the Closing Date
                  are scheduled to take place under the existing Capital
                  Adequacy Rules, Eurodollar Rules, or L/C Rules or any
                  increases in the capital that any Related Lender is required
                  to maintain to the extent that the increases are required due
                  to a regulatory authority's assessment of the financial
                  condition of such Related Lender.

         The Lender will promptly notify the Parent Borrower of any event of
         which it has knowledge, occurring after the date hereof, which will
         entitle the Lender to compensation pursuant to this Section 2.17.
         Certificates of any Related Lender sent to the Parent Borrower from
         time to time claiming compensation under this Section 2.17, stating the
         reason therefor and setting forth in reasonable detail the calculation
         of the additional amount or amounts to be paid to the Related Lender
         hereunder to restore its Return shall be conclusive absent manifest
         error. In determining such amounts, the Related Lender may use any
         reasonable averaging and attribution methods.




                                      -24-
Eagle Geophysical Credit Agreement 
<PAGE>   29

                  Section 2.18 Funding Exceptions.

                  (a) BASIS FOR DETERMINING INTEREST RATE INADEQUATE OR UNFAIR.
         If with respect to any Interest Period:

                           (i) the Lender determines that deposits in U.S.
                  dollars (in the applicable amounts) are not being offered in
                  the London interbank eurodollar market for such Interest
                  Period; or

                           (ii) the Lender otherwise determines that by reason
                  of circumstances affecting the London interbank eurodollar
                  market adequate and reasonable means do not exist for
                  ascertaining the applicable Eurodollar Rate; or

                           (iii) the Lender determines that the funding of
                  Eurodollar Rate Advances has become impracticable as a result
                  of an event occurring after the date of this Agreement which
                  in the opinion of the Lender materially affects such
                  Eurodollar Rate Advances;

         then the Lender shall promptly notify the Parent Borrower and (A) upon
         the occurrence of any event described in the foregoing clause (i) the
         Borrowers shall enter into good faith negotiations with the Lender in
         order to determine an alternate method to determine the Eurodollar Rate
         for the Lender, and during the pendency of such negotiations with the
         Lender, the Lender shall have no obligation to make any new Eurodollar
         Rate Advances, and (B) upon the occurrence of any event described in
         the foregoing clauses (ii) or (iii), for so long as such circumstances
         shall continue, the Lender shall have no obligation to make any new
         Eurodollar Rate Advances.

                  (b) ILLEGALITY. If any change in (including the adoption of
         any new) applicable laws or regulations, or any change in the
         interpretation of applicable laws or regulations by any governmental
         authority, central bank, comparable agency or any other regulatory body
         charged with the interpretation, implementation or administration
         thereof, or compliance by the Lender with any request or directive
         (whether or not having the force of law) of any such authority, central
         bank, comparable agency or other regulatory body, should make it or, in
         the good faith judgment of the Lender, shall raise a substantial
         question as to whether it is unlawful for the Lender to maintain or
         fund Eurodollar Rate Advances, then (i) the Lender shall promptly
         notify the Parent Borrower, (ii) the obligation of the Lender to
         maintain or convert into Eurodollar Rate Advances shall, upon the
         effectiveness of such event, be suspended for the duration of such
         unlawfulness, and (iii) for the duration of such unlawfulness, any
         notice by the Parent Borrower requesting the Lender to convert into
         Eurodollar Rate Advances shall be construed as a request to continue
         making Floating Rate Advances.

                   Section 2.19 Voluntary Prepayment; Reduction of the Maximum
Line; Termination of the Credit Facility by the Borrowers. Except as otherwise
provided herein, the Borrowers may prepay the Revolving Advances in whole at any
time or from time to time in part. The Borrowers may terminate the Credit
Facility or reduce the Maximum Line at any





                                      -25-
Eagle Geophysical Credit Agreement 
<PAGE>   30

time if they (i) give the Lender at least 30 days' prior written notice and (ii)
pay the Lender the prepayment, termination or line reduction fees in accordance
with Section 2.20. Any reduction in the Maximum Line must be in an amount not
less than $5,000,000 or an integral multiple thereof. If the Borrowers reduce
the Maximum Line to zero, all Obligations shall be immediately due and payable.
Upon termination of the Credit Facility and payment and performance of all
Obligations, the Lender shall release or terminate the Security Interest and the
Security Documents to which the Borrowers are entitled by law.

                  Section 2.20 Termination, Line Reduction and Prepayment Fees;
Waiver of Termination, Prepayment and Line Reduction Fees.

                  (a) TERMINATION AND LINE REDUCTION FEES. If the Lender after
         an Event of Default, or the Borrowers at any time, terminate the Credit
         Facility as of a date other than the Maturity Date, or if the Borrowers
         reduce the Maximum Line, the Borrowers shall pay the Lender a fee in an
         amount equal to a percentage of the Maximum Line (or the reduction, as
         the case may be) as follows: (i) three percent (3.0%) if the
         termination or reduction occurs on or before the first anniversary of
         the Funding Date; (ii) two percent (2.0%) if the termination or
         reduction occurs after the first anniversary of the Funding Date but on
         or before the second anniversary of the Funding Date; and (iii) one
         percent (1.0%) if the termination or reduction occurs after the second
         anniversary of the Funding Date but before the Maturity Date.

                  (b) WAIVER OF TERMINATION AND LINE REDUCTION FEES. The
         Borrowers will not be required to pay the termination or line reduction
         fees otherwise due under this Section 2.20 if such termination or line
         reduction is made from the proceeds of a refinancing by Norwest Bank
         Texas or Wells Fargo Bank.

                  Section 2.21 Mandatory Prepayment. Without notice or demand,
if the sum of the outstanding principal balance of the Revolving Advances plus
the L/C Amount shall at any time exceed the Borrowing Base, the Borrowers shall
(i) first, immediately prepay the Revolving Advances to the extent necessary to
eliminate such excess; and (ii) if prepayment in full of the Revolving Advances
is insufficient to eliminate such excess, pay to the Lender in immediately
available funds for deposit in the Special Account an amount equal to the
remaining excess. Any payment received by the Lender under this Section 2.21 or
under Section 2.19 may be applied to the Obligations, in such order and in such
amounts as the Lender, in its discretion, may from time to time determine.

                  Section 2.22 Payment. All payments to the Lender shall be made
in immediately available funds and shall be applied to the Obligations one
Banking Day after receipt by the Lender. The Lender may hold all payments not
constituting immediately available funds for three (3) additional days before
applying them to the Obligations. Notwithstanding anything in Section 2.1, the
Borrowers hereby authorize the Lender, in its discretion at any time or from
time to time without the Borrowers' request and even if the conditions set forth
in Section 4.4 would not be satisfied, to make a Revolving Advance in an amount
equal to the portion of the Obligations from time to time due and payable.




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Eagle Geophysical Credit Agreement 
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                  Section 2.23 Payment on Non-Banking Days. Whenever any payment
to be made hereunder shall be stated to be due on a day which is not a Banking
Day, such payment may be made on the next succeeding Banking Day, and such
extension of time shall in such case be included in the computation of interest
on the Advances or the fees hereunder, as the case may be.

                  Section 2.24 Use of Proceeds. The Borrowers shall use the
proceeds of Advances, and each Letter of Credit, if any, in accordance with
Schedule 2.24.

                  Section 2.25 Liability Records. The Lender may maintain from
time to time, at its discretion, liability records as to the Obligations. All
entries made on any such record shall be presumed correct until the Borrowers
establish the contrary. Upon the Lender's demand, the Borrowers will admit and
certify in writing the exact principal balance of the Obligations that the
Borrowers then assert to be outstanding. Any billing statement or accounting
rendered by the Lender shall be conclusive and fully binding on the Borrowers
unless the Parent Borrower gives the Lender specific written notice of exception
within 30 days after receipt.

                                   ARTICLE III

                      SECURITY INTEREST; OCCUPANCY; SETOFF

                  Section 3.1 Grant of Security Interest. The Borrowers hereby
pledge, assign and grant to the Lender a security interest (collectively
referred to as the "Security Interest") in the Collateral, as security for the
payment and performance of the Obligations.

                  Section 3.2 Notification of Account Debtors and Other
Obligors. The Lender may at any time during a Default Period notify any account
debtor or other person obligated to pay the amount due that such right to
payment has been assigned or transferred to the Lender for security and shall be
paid directly to the Lender. The Borrowers will join in giving such notice if
the Lender so requests. At any time after the Borrowers or the Lender give such
notice to an account debtor or other obligor, the Lender may, but need not, in
the Lender's name or in the applicable Borrower's name, (a) demand, sue for,
collect or receive any money or property at any time payable or receivable on
account of, or securing, any such right to payment, or grant any extension to,
make any compromise or settlement with or otherwise agree to waive, modify,
amend or change the obligations (including collateral obligations) of any such
account debtor or other obligor; and (b) as the applicable Borrower's agent and
attorney-in-fact, notify the United States Postal Service to change the address
for delivery of such Borrower's mail to any address designated by the Lender,
otherwise intercept such Borrower's mail, and receive, open and dispose of such
Borrower's mail, applying all Collateral as permitted under this Agreement and
holding all other mail for such Borrower's account or forwarding such mail to
such Borrower's last known address.

                  Section 3.3 Assignment of Insurance. As additional security
for the payment and performance of the Obligations, the Borrowers hereby assign
to the Lender any and all monies (including, without limitation, proceeds of
insurance and refunds of unearned 




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Eagle Geophysical Credit Agreement 
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premiums) due or to become due under, and all other rights of each Borrower with
respect to, any and all policies of insurance now or at any time hereafter
covering the Collateral or any evidence thereof or any business records or
valuable papers pertaining thereto, and the Borrowers hereby direct the issuer
of any such policy to pay all such monies directly to the Lender. At any time,
whether or not a Default Period then exists, the Lender may (but need not), in
the Lender's name or in the applicable Borrower's name, execute and deliver
proof of claim, receive all such monies, endorse checks and other instruments
representing payment of such monies, and adjust, litigate, compromise or release
any claim against the issuer of any such policy.

                  Section 3.4 Occupancy.

                  (a) The Borrowers hereby irrevocably grant to the Lender the
         right to take exclusive possession of the Premises at any time during a
         Default Period.

                  (b) The Lender may use the Premises only to hold, process,
         manufacture, sell, use, store, liquidate, realize upon or otherwise
         dispose of goods that are Collateral and for other purposes that the
         Lender may in good faith deem to be related or incidental purposes.

                  (c) The Lender's right to hold the Premises shall cease and
         terminate upon the earlier of (i) payment in full and discharge of all
         Obligations and termination of the Commitment, and (ii) final sale or
         disposition of all goods constituting Collateral and delivery of all
         such goods to purchasers.

                  (d) The Lender shall not be obligated to pay or account for
         any rent or other compensation for the possession, occupancy or use of
         any of the Premises; provided, however, that if the Lender does pay or
         account for any rent or other compensation for the possession,
         occupancy or use of any of the Premises, the Borrowers shall reimburse
         the Lender promptly for the full amount thereof. In addition, the
         Borrowers will pay, or reimburse the Lender for, all taxes, fees,
         duties, imposts, charges and expenses at any time incurred by or
         imposed upon the Lender by reason of the execution, delivery,
         existence, recordation, performance or enforcement of this Agreement or
         the provisions of this Section 3.4.

                  Section 3.5 License. Each Borrower hereby grants to the Lender
a non-exclusive, worldwide and royalty-free license to use or otherwise exploit
all trademarks, franchises, trade names, copyrights and patents owned by it for
the purpose of selling, leasing or otherwise disposing of any or all Collateral
during any Default Period.

                  Section 3.6 Financing Statement. A carbon, photographic or
other reproduction of this Agreement or of any financing statements signed by a
Borrower is sufficient as a financing statement and may be filed as a financing
statement in any state to perfect the security interests granted hereby by that
Borrower. For this purpose, Schedule 3.6 sets forth the name of each Borrower,
as debtor and the name of the Lender as secured party.





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Eagle Geophysical Credit Agreement 
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                  Section 3.7 Setoff. The Borrowers agree that the Lender may at
any time or from time to time, at its sole discretion and without demand and
without notice to anyone, setoff any liability owed to any Borrower by the
Lender, whether or not due, against any Obligation, whether or not due. In
addition, each other Person holding a participating interest in any Obligations
shall have the right to appropriate or setoff any deposit or other liability
then owed by such Person to any Borrower, whether or not due, and apply the same
to the payment of said participating interest, as fully as if such Person had
lent directly to such Borrower the amount of such participating interest.

                  Section 3.8 Accommodation Party Defenses Waived. The parties
intend that each Borrower shall be fully liable, jointly and severally, for all
Obligations. Nonetheless, in case a court finds that any Borrower is not such a
primary obligor with respect to all or any part of the Obligations, the
Borrowers expressly waive the benefit of any and all defenses and discharges
available to a guarantor, surety, endorser or accommodation party dependent on
an obligor's character as such. Without limiting the generality of the
foregoing, the liability of the Borrowers hereunder shall not be affected or
impaired in any way by any of the following acts or things (which the Lender is
hereby expressly authorized to do, omit or suffer from time to time without
notice to or consent of anyone): (i) any acceptance of collateral security,
guarantors, accommodation parties or sureties for any Obligations; (ii) any
extension or renewal of any Obligations (whether or not for longer than the
original period) or any modification of the interest rate, maturity or other
terms of any Obligations; (iii) any waiver or indulgence granted to any
Borrower, and any delay or lack of diligence in the enforcement of the
Obligations; (iv) any full or partial release of, compromise or settlement with,
or agreement not to sue, any Borrower, Guarantor or other person liable on any
Obligations; (v) any release, surrender, cancellation or other discharge of any
Obligations or the acceptance of any instrument in renewal or substitution for
any instrument evidencing any Obligations; (vi) any failure to obtain collateral
security (including rights of setoff) for any Obligations, or to see to the
proper or sufficient creation and perfection thereof, or to establish the
priority thereof, or to preserve, protect, insure, care for, exercise or enforce
any collateral security for any Obligations; (vii) any modification, alteration,
substitution, exchange, surrender, cancellation, termination, release or other
change, impairment, limitation, loss or discharge of any Collateral, Guarantor
Collateral or other collateral security for the Obligations; (viii) any
assignment, sale, pledge or other transfer of any of Obligations; or (ix) any
manner, order or method of application of any payments or credits on any
Obligations.

                                   ARTICLE IV

                              CONDITIONS OF LENDING

                  Section 4.1 Conditions Precedent to the Initial Revolving
Advance and the Initial Letter of Credit. The Lender's obligation to make the
initial Revolving Advance or to cause to be issued the initial Letter of Credit
hereunder shall be subject to the condition precedent that the Lender shall have
received all of the following, each in form and substance satisfactory to the
Lender:



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Eagle Geophysical Credit Agreement 
<PAGE>   34

                  (a) This Agreement, properly executed by the Borrowers.

                  (b) The Note, properly executed by the Borrowers.

                  (c) A true and correct copy of any and all leases pursuant to
         which any Borrower is leasing any portion of the Premises, together
         with a landlord's disclaimer and consent with respect to each such
         lease.

                  (d) The Collateral Pledge Agreement, properly executed by the
         Parent Borrower together with certificates representing all of the
         Parent Borrower's shares in each of its Subsidiaries and stock powers
         with respect to such certificates.

                  (e) The Collateral Account Agreement, properly executed by the
         Borrowers and Wells Fargo.

                  (f) The Lockbox Agreement, properly executed by the Borrowers
         and Wells Fargo.

                  (g) Current searches of appropriate filing offices showing
         that (i) no state or federal tax Liens have been filed and remain in
         effect against any Borrower or any Guarantor, (ii) no financing
         statements have been filed and remain in effect against any Borrower or
         any Guarantor except those financing statements relating to Permitted
         Liens or to Liens held by Persons who have agreed in writing that upon
         receipt of proceeds of the Advances, they will deliver UCC releases
         and/or terminations satisfactory to the Lender, and (iii) the Lender
         has duly filed all financing statements necessary to perfect the
         Security Interest, to the extent the Security Interest is capable of
         being perfected by filing.

                  (h) A certificate of each Borrower's secretary or assistant
         secretary certifying that attached to such certificate are true correct
         and complete copies of (i) the resolutions of that Borrower's directors
         and if required, shareholders, authorizing the execution, delivery and
         performance of the Loan Documents, (ii) that Borrower's articles of
         incorporation and bylaws, and (iii) the names, titles and signatures of
         that Borrower's officers or agents authorized to execute and deliver
         the Loan Documents and other instruments, agreements and certificates,
         including Advance requests, on that Borrower's behalf.

                  (i) Current certificates issued by the Secretary of State of
         Delaware and Texas, certifying that each Borrower is in compliance with
         all applicable organizational requirements of the States of Delaware or
         Texas, as the case may be.

                  (j) Evidence that each Borrower and each Guarantor is duly
         licensed or qualified to transact business in all jurisdictions where
         the character of the property owned or leased or the nature of the
         business transacted by it makes such licensing or qualification
         necessary.






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Eagle Geophysical Credit Agreement 
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                  (k) An opinion of counsel to the Borrowers, addressed to the
         Lender.

                  (l) Payment of the fees and commissions due through the date
         of the initial Advance or Letter of Credit under Section 2.15 and
         expenses incurred by the Lender through such date and required to be
         paid by the Borrowers under Section 9.6, including all legal expenses
         incurred through the date of this Agreement.

                  (m) After making the initial Revolving Advance, and (i)
         retiring all Debt owed to Bank One, (ii) satisfying all trade payables
         of each Borrower over 60 days past due, (iii) paying all overdrafts of
         each Borrower, and (iv) satisfying all conditions set forth in this
         Section 4.1, Availability shall be not less than $10,000,000.

                  (n) The Lender shall have reviewed and approved such contracts
         of the Companies as it may require.

                  (o) The Seitel No Offset Agreement, properly executed by
         Seitel.

                  (p) Such other documents as the Lender in its sole discretion
         may require.

                  Section 4.2 Conditions Precedent to Advances and Letters of
Credit after 30 Days. The Lender's obligation to make each Advance or to cause
the Issuer to issue any Letter of Credit after the 30th day after the Funding
Date shall be subject to the further conditions precedent that on or before such
date the Lender shall have received all of the following, each in form and
substance satisfactory to the Lender:

                  (a) The Guarantor Documents, properly executed by each
         Guarantor.

                  (b) A certificate of each Guarantor's secretary or assistant
         secretary certifying that attached to such certificate are true,
         correct and complete copies of (i) appropriate resolutions of that
         Guarantor's directors and if required, shareholders, authorizing the
         execution, delivery and performance of that the Guarantor Documents to
         which it is a party, (ii) that Guarantor's articles of incorporation
         and bylaws, and (iii) the names, titles and signatures of each
         Guarantor's officers or agents authorized to execute and deliver the
         Guarantor Documents on that Guarantor's behalf.

                  (c) An opinion of counsel to each Guarantor, addressed to the
         Lender.

                  Section 4.3 Condition Precedent to Revolving Advances over $5
million. The Lender's obligation to make any Revolving Advance in an amount
greater than $5,000,000 shall be subject to the further condition precedent that
on or immediately before such date, the chief financial officer of the Parent
Borrower shall deliver a certificate to the Lender to the effect that as of the
date of such certificate no Default Period exists and that to the best knowledge
of such officer, no Default or Event of Default will exist immediately after the
Borrowers receive the proceeds of such Advance.





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Eagle Geophysical Credit Agreement 
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                  Section 4.4 Conditions Precedent to All Advances and Letters
of Credit. The Lender's obligation to make each Advance or to cause the Issuer
to issue any Letter of Credit shall be subject to the further conditions
precedent that on such date:

                  (a) the representations and warranties contained in Article V
         are correct on and as of the date of such Advance or issuance of Letter
         of Credit as though made on and as of such date, except to the extent
         that such representations and warranties relate solely to an earlier
         date; and

                  (b) no event has occurred and is continuing, or would result
         from such Advance or the issuance of such Letter of Credit, as the case
         may be, which constitutes a Default or an Event of Default.

                                    ARTICLE V

                         REPRESENTATIONS AND WARRANTIES

                  Each Borrower represents and warrants to the Lender as
follows:

                   Section 5.1 Existence and Power; Name; Chief Executive
Office; Inventory and Equipment Locations; Tax Identification Number.

                  (a) Each Company is a corporation or limited partnership, duly
         organized, validly existing and in good standing under the laws of the
         State of its organization and is duly licensed or qualified to transact
         business in all jurisdictions where the character of the property owned
         or leased or the nature of the business transacted by it makes such
         licensing or qualification necessary.

                  (b) No dissolution or termination of any Company has occurred,
         and no notice of dissolution or articles of termination have been filed
         with respect to any Company.

                  (c) Each Company has all requisite power and authority,
         corporate or otherwise, to conduct its business, to own its properties
         and to execute and deliver, and to perform all of its obligations
         under, the Loan Documents.

                  (d) During their existence, the Companies have done business
         solely under the names set forth in Schedule 5.1 hereto.

                  (e) For each Borrower, (i) its chief executive office and
         principal place of business is located at the address set forth in
         Schedule 5.1; (ii) all of its records relating to its business and the
         Collateral are kept at that location; (iii) all of its Inventory and
         Equipment is located at that location or at one of the other locations
         set forth in Schedule 5.1; (iv) its tax identification number is
         correctly set forth in Schedule 3.6.





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Eagle Geophysical Credit Agreement 
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                  Section 5.2 Capitalization. Schedule 5.2 constitutes a correct
and complete list of all shareholder interests of each Company other than the
Parent Borrower and rights to acquire such shareholder interests, including the
amount and record holder thereof and an organizational chart showing the
ownership structure of all Subsidiaries of the Parent Borrower.

                   Section 5.3 Authorization of Borrowing; No Conflict as to Law
or Agreements. The execution, delivery and performance by each Company of the
Loan Documents and Guarantor Documents to which it is a party, and the
borrowings from time to time hereunder by the Borrowers, have been duly
authorized by all necessary corporate action and do not and will not (i) require
any consent or approval of any Company's shareholders; (ii) require any
authorization, consent or approval by, or registration, declaration or filing
with, or notice to, any governmental department, commission, board, bureau,
agency or instrumentality, domestic or foreign, or any third party, except such
authorization, consent, approval, registration, declaration, filing or notice as
has been obtained, accomplished or given prior to the date hereof; (iii) violate
any provision of any law, rule or regulation (including, without limitation,
Regulation X of the Board of Governors of the Federal Reserve System) or of any
order, writ, injunction or decree presently in effect having applicability to
any Company or of any Company's articles of incorporation and bylaws; (iv)
result in a breach of or constitute a default under any indenture or loan or
credit agreement or any other material agreement, lease or instrument to which
any Company is a party or by which it or its properties may be bound or
affected; or (v) result in, or require, the creation or imposition of any Lien
(other than the Security Interest and the Liens granted under the Security
Documents and the Guarantor Documents) upon or with respect to any of the
properties now owned or hereafter acquired by any Company.

                  Section 5.4 Legal Agreements. This Agreement constitutes and,
upon due execution by the Companies, the other Loan Documents and Guarantor
Documents will constitute, the legal, valid and binding obligations of the
Companies, enforceable against the applicable Companies in accordance with their
respective terms.

                  Section 5.5 Subsidiaries. Except as set forth in Schedule 5.5,
no Borrower has any Subsidiaries.

                  Section 5.6 Financial Condition; No Adverse Change. The Parent
Borrower has heretofore furnished to the Lender its audited financial statements
dated as of December 31, 1997, and its unaudited interim financial statements
dated as of November 30, 1998, and those statements fairly present the
consolidated financial condition of the Parent Borrower and its Subsidiaries as
of the dates thereof and the results of their operations and cash flows for the
periods then ended and were prepared in accordance with generally accepted
accounting principles. Since the date of the most recent financial statements,
there has been no material adverse change in any Borrower's or any Subsidiary's
business, properties or condition (financial or otherwise).





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Eagle Geophysical Credit Agreement 
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                  Section 5.7 Litigation. There are no actions, suits or
proceedings pending or, to any Borrower's knowledge, threatened against or
affecting any Company or any of its Affiliates or the properties of any Company
or any of its Affiliates before any court or governmental department,
commission, board, bureau, agency or instrumentality, domestic or foreign,
which, if determined adversely to that Company or any of its Affiliates, would
have a material adverse effect on the financial condition, properties or
operations of that Company or any of its Affiliates.

                  Section 5.8 Regulation U. No Company is engaged in the
business of extending credit for the purpose of purchasing or carrying margin
stock (within the meaning of Regulation U of the Board of Governors of the
Federal Reserve System), and no part of the proceeds of any Advance will be used
to purchase or carry any margin stock or to extend credit to others for the
purpose of purchasing or carrying any margin stock.

                  Section 5.9 Taxes. The Companies and their Affiliates have
paid or caused to be paid to the proper authorities when due all federal, state
and local taxes required to be withheld by each of them. The Companies and their
Affiliates have filed all federal, state and local tax returns which to the
knowledge of the officers of the Companies or any Affiliate, as the case may be,
are required to be filed, and the Companies and their Affiliates have paid or
caused to be paid to the respective taxing authorities all taxes as shown on
said returns or on any assessment received by any of them to the extent such
taxes have become due.

                  Section 5.10 Titles and Liens. Each Company has good and
absolute title to all Collateral, Guarantor Collateral and other collateral
described in the collateral reports provided to the Lender and all other
properties and assets reflected in the latest financial statements referred to
in Section 5.6 and all proceeds thereof, free and clear of all Liens except for
Permitted Liens. No financing statement or similar instrument naming any Company
as debtor is on file in any office except to perfect only Permitted Liens.

                  Section 5.11 Intellectual Property Rights. Each Company (a)
owns or has the exclusive right to use, free and clear of all material Liens,
claims and restrictions, all patents, trademarks, service marks, trade names,
copyrights, licenses and rights with respect to the foregoing, used in the
conduct of its business as now conducted; (b) owns or has the unrestricted right
to use all trade secrets, including know-how, inventions, designs, processes,
computer programs and technical data necessary to the development, operation and
sale of all products and services sold or proposed to be sold by it, free and
clear of any rights, Liens or claims of others; and (c) is not using any
confidential information or trade secrets of others. No Company is obligated or
under any liability whatsoever to make any payments of a material nature by way
of royalties, fees or otherwise to any owner of, licensor of, or other claimant
to, any patent, trademark, trade name, copyright or other intangible asset, with
respect to the use thereof or in connection with the conduct of its business or
otherwise, is, or has received notice with respect to, infringing upon or
otherwise acting adversely to any known right or claimed right of any person
under or with respect to any patents, trademarks, service marks, trade names,
copyrights, licenses or rights with respect to the foregoing.





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Eagle Geophysical Credit Agreement 
<PAGE>   39

                  Section 5.12 Plans. Except as disclosed to the Lender in
writing prior to the date hereof, no Company maintains or has maintained any
Plan. No Company has received any notice or has any knowledge to the effect that
it is not in full compliance with any of the requirements of ERISA. No
Reportable Event or other fact or circumstance which may have an adverse effect
on the Plan's tax qualified status exists in connection with any Plan. No
Company has:

                  (a) Any accumulated funding deficiency within the meaning of
         ERISA; or

                  (b) Any liability or knows of any fact or circumstances which
         could result in any liability to the Pension Benefit Guaranty
         Corporation, the Internal Revenue Service, the Department of Labor or
         any participant in connection with any Plan (other than accrued
         benefits which or which may become payable to participants or
         beneficiaries of any such Plan).

                  Section 5.13 Default. Each Company is in compliance with all
provisions of all agreements, instruments, decrees and orders to which it is a
party or by which it or its property is bound or affected, the breach or default
of which could have a material adverse effect on that Company's financial
condition, properties or operations.

                  Section 5.14 Environmental Matters.

                  (a) Definitions. As used in this Agreement, the following
         terms shall have the following meanings:

                           (i) "Environmental Law" means any governmental
                  statute, regulation, law or ordinance of any jurisdiction
                  domestic or foreign dealing with the protection of human
                  health and the environment.

                           (ii) "Hazardous Substances" means pollutants,
                  contaminants, hazardous substances, hazardous wastes,
                  petroleum and fractions thereof, and all other chemicals,
                  wastes, substances and materials listed in, regulated by or
                  identified in any Environmental Law.

                  (b) To the Borrowers' best knowledge, there are not present in
         the Ships or in, on or under the Premises, any Hazardous Substances in
         such form or quantity as to create any material liability or obligation
         for any Borrower or the Lender under common law of any jurisdiction or
         under any Environmental Law (other than Hazardous Substances in the
         Borrowers' possession in compliance with all applicable laws and
         pursuant to all required permits), and no Hazardous Substances have
         ever been stored, spilled, leaked, discharged, emitted or released in
         or from the Ships or the Premises, or buried under the Premises, in
         such a way as to create any such liability.

                  (c) To the Borrowers' best knowledge, no Company has disposed
         of Hazardous Substances in such a manner as to create any material
         liability under any Environmental Law.





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Eagle Geophysical Credit Agreement 
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                  (d) There are not and there never have been any requests,
         claims, notices, investigations, demands, administrative proceedings,
         hearings or litigation, relating in any way to the Premises, the Ships
         or any Company, alleging material liability under, violation of, or
         noncompliance with any Environmental Law or any license, permit or
         other authorization issued pursuant thereto. To the Borrowers' best
         knowledge, no such matter is threatened or impending.

                  (e) To the Borrowers' best knowledge, each Company's
         businesses are and have in the past always been conducted in accordance
         with all Environmental Laws and all licenses, permits and other
         authorizations required pursuant to any Environmental Law and necessary
         for the lawful and efficient operation of such businesses are in the
         appropriate Company's possession and are in full force and effect. No
         permit required under any Environmental Law is scheduled to expire
         within 3 months and there is no threat that any such permit will be
         withdrawn, terminated, limited or materially changed.

                  (f) To the Borrowers' best knowledge, the Premises are not and
         never have been listed on the National Priorities List, the
         Comprehensive Environmental Response, Compensation and Liability
         Information System or any similar federal, state or local list,
         schedule, log, inventory or database.

                  (g) The Parent Borrower has and will keep at its headquarters
         in Houston, Texas, copies of all environmental assessments, audits,
         reports, permits, licenses and other documents describing or relating
         in any way to the Premises, the Ships or any Company's businesses, and
         shall make such documents available to the Lender upon request.

                  Section 5.15 Submissions to Lender. All financial and other
information provided to the Lender by or on behalf of the Companies in
connection with the Borrowers' request for the Credit Facilities is true and
correct in all material respects and, as to projections, valuations or proforma
financial statements, present a good faith opinion as to such projections,
valuations and proforma condition and results.

                  Section 5.16 Financing Statements. Each Borrower and Domestic
Guarantor has provided to the Lender signed financing statements, which are
sufficient when filed to perfect the Security Interest and the other security
interests created by the Security Documents and the Guarantor Documents to the
extent such security interests are capable of being perfected by filing. When
such financing statements are filed in the offices noted therein, the Lender
will have a valid and perfected security interest in all Collateral and all
other collateral described in the Security Documents which is capable of being
perfected by filing financing statements. None of the Collateral, Guarantor
Collateral or other collateral covered by the Security Documents is or will
become a fixture on real estate in the United States, unless a sufficient
fixture filing is in effect with respect thereto.

                  Section 5.17 Rights to Payment. Each right to payment and each
instrument, document, chattel paper and other agreement constituting or
evidencing Collateral, Guarantor Collateral or other collateral covered by the
Security Documents is (or, in the case of all




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Eagle Geophysical Credit Agreement 
<PAGE>   41

future Collateral, Guarantor Collateral or such other collateral, will be when
arising or issued) the valid, genuine and legally enforceable obligation,
subject to no defense, setoff or counterclaim, of the account debtor or other
obligor named therein or in any Company's records pertaining thereto as being
obligated to pay such obligation.

                  Section 5.18 Financial Solvency. Both before and after giving
effect to the transactions contemplated in the Loan Documents, no Company:

                  (a) was or will be insolvent, as that term is used and defined
         in Section 101(32) of the United States Bankruptcy Code and Section 2
         of the Uniform Fraudulent Transfer Act;

                  (b) has unreasonably small capital or is engaged or about to
         engage in a business or a transaction for which any remaining assets of
         that Company are unreasonably small;

                  (c) by executing, delivering or performing its obligations
         under the Loan Documents, Guarantor Documents or other documents to
         which it is a party or by taking any action with respect thereto,
         intends to, nor believes that it will, incur debts beyond its ability
         to pay them as they mature;

                  (d) by executing, delivering or performing its obligations
         under the Loan Documents, Guarantor Documents or other documents to
         which it is a party or by taking any action with respect thereto,
         intends to hinder, delay or defraud either its present or future
         creditors; and

                  (e) at this time contemplates filing a petition in bankruptcy
         or for an arrangement or reorganization or similar proceeding under any
         law any jurisdiction, nor, to the best knowledge of the Borrowers, is
         the subject of any actual, pending or threatened bankruptcy, insolvency
         or similar proceedings under any law of any jurisdiction.

                                   ARTICLE VI

                        BORROWERS' AFFIRMATIVE COVENANTS

                  So long as the Obligations shall remain unpaid, or the Credit
Facility shall remain outstanding, the Borrowers will comply with the following
requirements, unless the Lender shall otherwise consent in writing:

                  Section 6.1 Reporting Requirements. The Borrowers will
deliver, or cause to be delivered, to the Lender each of the following, which
shall be in form and detail acceptable to the Lender:

                  (a) ANNUAL AUDITED FINANCIAL STATEMENTS. The Parent Borrower
         will deliver to the Lender as soon as they are available, and in any
         event within 90 days




                                      -37-
Eagle Geophysical Credit Agreement 
<PAGE>   42

         after the end of each fiscal year of the Parent Borrower, the Parent
         Borrower's audited financial statements with the unqualified opinion of
         independent certified public accountants selected by the Parent
         Borrower and acceptable to the Lender, which annual financial
         statements shall include the Parent Borrower's balance sheet as at the
         end of such fiscal year and the related statements of income, retained
         earnings and cash flows for the fiscal year then ended, prepared on a
         consolidating and consolidated basis to include all Subsidiaries of the
         Parent Borrower, all in reasonable detail and prepared in accordance
         with GAAP, together with (i) copies of all management letters prepared
         by such accountants; and (ii) a certificate of the Parent Borrower's
         chief financial officer stating (A) that such financial statements have
         been prepared in accordance with GAAP and fairly represent the Parent
         Borrower's financial position and the results of its operations, (B)
         whether or not such officer has knowledge of the occurrence of any
         Default or Event of Default hereunder and, if so, stating in reasonable
         detail the facts with respect thereto, and (C) all relevant facts in
         reasonable detail to evidence, and the computations as to, whether or
         not the Parent Borrower is in compliance with the requirements set
         forth in Sections 6.14, 6.15, 6.16 and 7.11.

                  (b) MONTHLY UNAUDITED FINANCIAL STATEMENTS. The Parent
         Borrower will deliver to the Lender as soon as they are available and
         in any event within 30 days after the end of each month, the Parent
         Borrower's unaudited/internal balance sheet and statements of income
         and retained earnings as at the end of and for such month and for the
         fiscal year-to-date period then ended, prepared, if the Lender so
         requests, on a consolidating and consolidated basis to include all
         Subsidiaries of the Parent Borrower, in reasonable detail and stating
         in comparative form the figures for the corresponding date and periods
         in the previous fiscal year, all prepared in accordance with GAAP,
         subject to year-end audit adjustments; and accompanied by a certificate
         of the Parent Borrower's chief financial officer, substantially in the
         form of Exhibit E hereto stating (i) that such financial statements
         have been prepared in accordance with GAAP, subject to year-end audit
         adjustments, and fairly represent the Parent Borrower's financial
         position and the results of its operations, (ii) whether or not such
         officer has knowledge of the occurrence of any Default or Event of
         Default hereunder not theretofore reported and remedied and, if so,
         stating in reasonable detail the facts with respect thereto, and (iii)
         all relevant facts in reasonable detail to evidence, and the
         computations as to, whether or not the Parent Borrower is in compliance
         with the requirements set forth in Sections 6.14, 6.15, 6.16 and 7.11.

                  (c) MONTHLY REPORTS. The Parent Borrower will deliver to the
         Lender as soon as they are available and in any event within 15 days
         after the end of each month, agings of the Borrowers' accounts
         receivable and accounts payable, an accounts receivable reconciliation
         and a calculation of the Borrowers' Accounts and Eligible Accounts, as
         at the end of such month or shorter time period.

                  (d) MONTHLY-WEEKLY REPORTS. The Parent Borrower will deliver
         to the Lender as soon as available and in any event within 15 days
         after the end of each




                                      -38-
Eagle Geophysical Credit Agreement 
<PAGE>   43

         month, or, if the outstanding principal balance of the Note is greater
         than $-0- and Availability is less than $10,000,000, within two (2)
         Business Days after the end of each week, any and all receivables
         schedules, collection reports, cash receipt and deposit records, copies
         of invoices to account debtors, shipment documents and delivery
         receipts for goods sold concerning the Companies as the Lender may
         require.

                  (e) ANNUAL PROJECTIONS. At least 30 days before the beginning
         of each fiscal year of the Parent Borrower, the Parent Borrower will
         deliver to the Lender the projected balance sheets and income
         statements for the Companies for each month of such year, each in
         reasonable detail, representing the Parent Borrower's good faith
         projections and certified by the Parent Borrower's chief financial
         officer as being the most accurate projections available and identical
         to the projections used by the Companies for internal planning
         purposes, together with such supporting schedules and information as
         the Lender may in its discretion require.

                  (f) LITIGATION. Immediately after the commencement thereof,
         the Parent Borrower will give notice in writing to the Lender of all
         litigation and of all proceedings before any governmental or regulatory
         agency affecting any Borrower of the type described in Section 5.14 or
         which seek a monetary recovery against a Borrower in excess of
         $250,000.

                  (g) DEFAULTS. As promptly as practicable (but in any event not
         later than five business days) after an officer of any Company obtains
         knowledge of the occurrence of any breach, default or event of default
         under any Security Document or Guarantor Document or any event which
         constitutes a Default or Event of Default hereunder, the Parent
         Borrower will give to the Lender notice of such occurrence, together
         with a detailed statement by a responsible officer of the applicable
         Company of the steps being taken by that Company to cure the effect of
         such breach, default or event.

                  (h) REPORTABLE EVENTS. As soon as possible and in any event
         within 30 days after any Company knows or has reason to know that any
         Reportable Event with respect to any Plan has occurred, the Parent
         Borrower will deliver to the Lender a statement of the Parent
         Borrower's chief financial officer setting forth details as to such
         Reportable Event and the action which the Borrowers propose to take
         with respect thereto, together with a copy of the notice of such
         Reportable Event to the Pension Benefit Guaranty Corporation.

                  (i) PLAN CONTRIBUTIONS. As soon as possible, and in any event
         within 10 days after any Company fails to make any quarterly
         contribution required with respect to any Plan under Section 412(m) of
         the Internal Revenue Code of 1986, as amended, the Parent Borrower will
         deliver to the Lender the statement of the Parent Borrower's chief
         financial officer setting forth details as to such failure and the
         action which the Borrowers propose to take with respect thereto,
         together with a copy of any notice of such failure required to be
         provided to the Pension Benefit Guaranty Corporation.





                                      -39-
Eagle Geophysical Credit Agreement 
<PAGE>   44

                  (j) DISPUTES. Promptly upon knowledge thereof, the Parent
         Borrower will deliver to the Lender notice of (i) any disputes or
         claims by any Company's customers exceeding $250,000 individually or
         $500,000 in the aggregate during any fiscal year; (ii) credit memos for
         amounts exceeding $50,000 or such lesser amount as will provide the
         Lender with ten percent (10%) of all credit memos generated on a
         monthly or yearly basis; (iii) any goods returned to or recovered by
         any Company;

                  (k) CHANGE IN SENIOR MANAGEMENT. Promptly upon knowledge
         thereof, the Parent Borrower will deliver to the Lender notice of any
         change in the persons constituting the Parent Borrower's senior
         officers and directors.

                  (l) COLLATERAL. Promptly upon knowledge thereof, the Parent
         Borrower will deliver to the Lender notice of any loss of or material
         damage to any Collateral or other collateral covered by the Security
         Documents or the Guarantor Documents or of any substantial adverse
         change in any Collateral or such other collateral or the prospect of
         payment thereof.

                  (m) REPORTS TO OWNERS. Promptly upon their distribution, the
         Parent Borrower will deliver to the Lender copies of all financial
         statements, reports and proxy statements which the Parent Borrower
         shall have sent to its stockholders.

                  (n) SEC REPORTS. Promptly after the sending or filing thereof,
         the Parent Borrower will deliver to the Lender copies of all regular
         and periodic reports which any Company shall file with the Securities
         and Exchange Commission or any national securities exchange.

                  (o) TAX RETURN. As soon as possible, and in any event by not
         later than April 30th of each year, copies of the Parent Borrower's
         United States tax return and all schedules thereto.

                  (p) VIOLATION OF LAW. Promptly upon knowledge thereof, the
         Parent Borrower will deliver to the Lender notice of any Company's
         violation of any law, rule or regulation, the non-compliance with which
         could materially and adversely affect that Company's business or its
         financial condition.

                  (q) OTHER INFORMATION. From time to time, with reasonable
         promptness, the Parent Borrower will deliver to the Lender such other
         material, reports, records or information as the Lender may request.

                  Section 6.2 Books and Records; Inspection and Examination. The
Borrowers will, and will cause each other Company to, keep accurate books of
record and account for itself pertaining to the Collateral and Guarantor
Collateral and pertaining to that Company's business and financial condition and
such other matters as the Lender may from time to time request in which true and
complete entries will be made in accordance with GAAP and, upon the Lender's
request, will, and will cause each other Company to, permit any officer,
employee, attorney or accountant for the Lender to audit, review, make extracts
from or copy




                                      -40-
Eagle Geophysical Credit Agreement 
<PAGE>   45

any and all corporate and financial books and records of any Company at all
times during ordinary business hours, to send and discuss with account debtors
and other obligors requests for verification of amounts owed to any Company, and
to discuss each Company's affairs with any of its directors, officers, employees
or agents. Each Borrower will, and will cause each other Company to, permit the
Lender, or its employees, accountants, attorneys or agents, to examine and
inspect any Collateral, Guarantor Collateral, other collateral covered by the
Security Documents or any other property of any Company at any time during
ordinary business hours.

                  Section 6.3 Account Verification. The Lender may at any time
and from time to time send or require the Borrowers to send requests for
verification of accounts or notices of assignment to account debtors and other
obligors. The Lender may also at any time and from time to time telephone
account debtors and other obligors to verify accounts.

                  Section 6.4 Compliance with Laws.

                  (a) Each Borrower will, and will cause each other Company to
         (i) comply with the requirements of applicable laws and regulations,
         the non-compliance with which would materially and adversely affect its
         business or its financial condition and (ii) use and keep the
         Collateral and Guarantor Collateral, and require that others use and
         keep the Collateral and Guarantor Collateral, only for lawful purposes,
         without violation of any federal, state or local law, statute or
         ordinance.

                  (b) Without limiting the foregoing undertakings, each Borrower
         specifically agrees that it will, and will cause each other Company to,
         comply with all applicable Environmental Laws and obtain and comply
         with all permits, licenses and similar approvals required by any
         Environmental Laws, and will not generate, use, transport, treat, store
         or dispose of any Hazardous Substances in such a manner as to create
         any liability or obligation under the common law of any jurisdiction or
         any Environmental Law.

                  Section 6.5 Payment of Taxes and Other Claims. Each Borrower
will, and will cause each other Company to, pay or discharge, when due, (a) all
taxes, assessments and governmental charges levied or imposed upon it or upon
its income or profits, upon any properties belonging to it (including, without
limitation, the Collateral or Guarantor Collateral, as applicable) or upon or
against the creation, perfection or continuance of the Security Interest or any
security interest granted by the Guarantor Documents, prior to the date on which
penalties attach thereto, (b) all federal, state and local taxes required to be
withheld by it, and (c) all lawful claims for labor, materials and supplies
which, if unpaid, might by law become a Lien upon any properties of any Company;
provided, that no Company shall not be required to pay any such tax, assessment,
charge or claim whose amount, applicability or validity is being contested in
good faith by appropriate proceedings and for which proper reserves have been
made.



                                      -41-
Eagle Geophysical Credit Agreement 
<PAGE>   46

                  Section 6.6 Maintenance of Properties.

                  (a) Each Borrower will, and will cause each other Company to,
         keep and maintain the Collateral, Guarantor Collateral and the other
         collateral covered by the Security Documents and all of its other
         properties necessary or useful in its business in good condition,
         repair and working order (normal wear and tear excepted) and will from
         time to time replace or repair any worn, defective or broken parts;
         provided, however, that nothing in this Section 6.6 shall prevent any
         Company from discontinuing the operation and maintenance of any of its
         properties if such discontinuance is, in that Company's judgment,
         desirable in the conduct of its business and not disadvantageous in any
         material respect to the Lender as holder of the Obligations.

                  (b) Each Borrower will, and will cause each other Company to,
         defend the Collateral and Guarantor Collateral against all claims or
         demands of all persons (other than the Lender) claiming the Collateral
         or Guarantor Collateral or any interest therein.

                  (c) Each Borrower will, and will cause each other Company to,
         keep all Collateral, Guarantor Collateral and other collateral covered
         by the Security Documents and Guarantor Documents free and clear of all
         Liens except Permitted Liens.

                  Section 6.7 Ownership of Ships. One of the Borrowers or the
Guarantors shall at all times own the Ships. As of the date hereof, the "Austral
Horizon" is owned by Austral Horizon, Inc. and the "Atlantic Horizon" is owned
by Atlantic Horizon, Inc.

                  Section 6.8 Insurance. Each Borrower will, and will cause each
other Company to, obtain and at all times maintain insurance with insurers
believed by it to be responsible and reputable, in such amounts and against such
risks as may from time to time be required by the Lender, but in all events in
such amounts and against such risks as is usually carried by companies engaged
in similar business and owning similar properties in the same general areas in
which the Companies operate. Without limiting the generality of the foregoing,
each Borrower will, and will cause each other Company to, at all times keep all
tangible Collateral and Guarantor Collateral insured against risks of fire
(including so-called extended coverage), theft, collision (for Collateral or
Guarantor Collateral consisting of motor vehicles) and such other risks and in
such amounts as the Lender may reasonably request, with any loss payable to the
Lender to the extent of its interest, and all policies of such insurance shall
contain a lender's loss payable endorsement for the Lender's benefit acceptable
to the Lender. All policies of liability insurance required hereunder shall name
the Lender as an additional insured.

                  Section 6.9 Preservation of Existence. Each Borrower will, and
will cause each other Company to, preserve and maintain its existence and all of
its rights, privileges and franchises necessary or desirable in the normal
conduct of its business, and shall, and shall cause each other Company to,
conduct its business in an orderly, efficient and regular manner.



                                      -42-
Eagle Geophysical Credit Agreement 
<PAGE>   47

                  Section 6.10 Delivery of Instruments, etc. Upon request by the
Lender, the Borrowers will, and will cause the other Companies to, promptly
deliver to the Lender in pledge all instruments, documents and chattel papers
constituting Collateral or Guarantor Collateral, duly endorsed or assigned by
the applicable Company.

                  Section 6.11 Collateral Account.

                  (a) If, notwithstanding the instructions to debtors to make
         payments to the Lockbox, any Borrower receives any payments on
         Receivables, that Borrower shall deposit such payments into the
         Collateral Account. Until so deposited, each Borrower shall hold all
         such payments in trust for and as the property of the Lender and shall
         not commingle such payments with any of its other funds or property.

                  (b) Amounts deposited in the Collateral Account shall not bear
         interest and shall not be subject to withdrawal by any Borrower, except
         after full payment and discharge of all Obligations.

                  (c) All deposits in the Collateral Account shall constitute
         proceeds of Collateral and shall not constitute payment of the
         Obligations. The Lender from time to time at its discretion may, after
         allowing one Banking Day, apply deposited funds in the Collateral
         Account to the payment of the Obligations, in any order or manner of
         application satisfactory to the Lender, by transferring such funds to
         the Lender's general account.

                  (d) All items deposited in the Collateral Account shall be
         subject to final payment. If any such item is returned uncollected, the
         Borrowers will immediately pay the Lender, or, for items deposited in
         the Collateral Account, the bank maintaining such account, the amount
         of that item, or such bank at its discretion may charge any uncollected
         item to the Borrowers' commercial account or other account. Each
         Borrower shall be liable as an endorser on all items deposited in the
         Collateral Account, whether or not in fact endorsed by that Borrower.

                  Section 6.12 Ship Mortgages. Upon request by the Lender at any
time during a Default Period, the Parent Borrower shall cause each Company then
owning an interest in one or more of the Ships to grant the Lender a first
priority Lien in the "[Austral][Atlantic] Horizon".

                  Section 6.13 Performance by the Lender. If any Borrower at any
time fails to perform or observe any of the foregoing covenants contained in
this Article VI or elsewhere herein, and if such failure shall continue for a
period of ten calendar days after the Lender gives the Parent Borrower written
notice thereof (or in the case of the agreements contained in Sections 6.5, 6.8
and 6.11, immediately upon the occurrence of such failure, without notice or
lapse of time), the Lender may, but need not, perform or observe such covenant
on behalf and in the name, place and stead of the applicable Borrower (or, at
the Lender's option, in the



                                      -43-
Eagle Geophysical Credit Agreement 
<PAGE>   48


Lender's name) and may, but need not, take any and all other actions which the
Lender may reasonably deem necessary to cure or correct such failure (including,
without limitation, the payment of taxes, the satisfaction of Liens, the
performance of obligations owed to account debtors or other obligors, the
procurement and maintenance of insurance, the execution of assignments, security
agreements and financing statements, and the endorsement of instruments); and
the Borrowers shall thereupon pay to the Lender on demand the amount of all
monies expended and all costs and expenses (including reasonable attorneys' fees
and legal expenses) incurred by the Lender in connection with or as a result of
the performance or observance of such agreements or the taking of such action by
the Lender, together with interest thereon from the date expended or incurred at
the Default Rate. To facilitate the Lender's performance or observance of such
covenants of the Borrowers, each Borrower hereby irrevocably appoints the
Lender, or the Lender's delegate, acting alone, as that Borrower's attorney in
fact (which appointment is coupled with an interest) with the right (but not the
duty) from time to time to create, prepare, complete, execute, deliver, endorse
or file in the name and on behalf of that Borrower any and all instruments,
documents, assignments, security agreements, financing statements, applications
for insurance and other agreements and writings required to be obtained,
executed, delivered or endorsed by that Borrower under this Section 6.13.

                  Section 6.14 Minimum Consolidated EBITDA Coverage Ratio. The
Parent Borrower will maintain its Consolidated EBITDA Coverage Ratio, determined
as of the end of each month at not less than the amount set forth below opposite
such month:

<TABLE>
<CAPTION>
                                               Minimum Consolidated             
          Month Ending                        EBITDA Coverage Ratio
 ----------------------------------     -----------------------------------
<S>                                     <C> 
         March 31, 1999                                   1.50 to 1.00
         April 30, 1999                                   1.50 to 1.00
          May 31, 1999                                    1.50 to 1.00
         June 30, 1999                                    1.45 to 1.00
         July 31, 1999                                    1.45 to 1.00
        August 31, 1999                                   1.45 to 1.00
      September 30, 1999                                  1.30 to 1.00
       October 31, 1999                                   1.30 to 1.00
       November 30, 1999                                  1.30 to 1.00
     December 31, 1999 and                                1.50 to 1.00
          thereafter                 
</TABLE>



                  Section 6.15 Minimum Consolidated Modified Tangible Net Worth.
The Parent Borrower will maintain its Consolidated Modified Tangible Net Worth,
determined as of the end of each month, at not less than $57,500,000, increased
each year on the date the Lender receives the Parent Borrower's annual financial
statements, by the amount of positive Consolidated Net Income for the prior
fiscal year.


                                      -44-
Eagle Geophysical Credit Agreement 
<PAGE>   49




                  Section 6.16 Minimum Consolidated Current Ratio. The Parent
Borrower will maintain its Consolidated Current Ratio, determined as of the end
of each month at not less than the ratio set forth below:

<TABLE>
<CAPTION>
                                             Minimum Consolidated
               Fiscal Quarter Ending            Current Ratio
       ------------------------------------  ----------------------
<S>                                          <C> 
                March 31, 1999                    0.95 to 1.00
                June 30, 1999                     0.95 to 1.00
                September  30, 1999               1.00 to 1.00
                December 31, 1999 and             1.10 to 1.00
                thereafter                           
</TABLE>



                                   ARTICLE VII

                               NEGATIVE COVENANTS

                  So long as the Obligations shall remain unpaid, or the Credit
Facility shall remain outstanding, the Borrowers agree that, without the
Lender's prior written consent:

                  Section 7.1 Liens. The Borrowers will not, and will not permit
any other Company to, create, incur or suffer to exist any Lien upon or of any
of its assets, now owned or hereafter acquired, to secure any indebtedness;
excluding, however, from the operation of the foregoing, the following
(collectively, "Permitted Liens"):

                  (a) in the case of any of a Company's property which is not
         Collateral, Guarantor Collateral or other collateral described in the
         Security Documents, covenants, restrictions, rights, easements and
         minor irregularities in title which do not materially interfere with
         that Company's business or operations as presently conducted;

                  (b) mortgages, deeds of trust, pledges, liens, security
         interests and assignments in existence on the date hereof and listed in
         Schedule 7.1 hereto, securing indebtedness for borrowed money permitted
         under Section 7.2;

                  (c) the Security Interest and liens and security interests
         created by the Security Documents and Guarantor Documents; and

                  (d) purchase money security interests relating to the
         acquisition of machinery and equipment of a Company not exceeding the
         lesser of cost or fair market value thereof, not exceeding $500,000 for
         any one purchase or $5,000,000 in the aggregate during any fiscal year
         and so long as no Default Period is then in existence and none would
         exist immediately after such acquisition.

                  (e) Liens representing the interest or title of lessors under
         Capitalized Lease Obligations.


                                      -45-
Eagle Geophysical Credit Agreement 
<PAGE>   50

                  (f) Liens securing Hedging Obligations permitted to be
         incurred pursuant to Section 7.2(d).

                  (g) Liens incurred or deposits made to secure the performance
         of tenders, bids, leases, statutory obligations, surety and appeal
         bonds, government contracts, performance bonds and other obligations of
         a like nature incurred in the ordinary course of business (other than
         contracts for the payment of money).

                  (h) Easements, rights-of-way, restrictions and other similar
         charges or encumbrances not interfering in any material respect with
         the business of the Parent Borrower or any Restricted Subsidiary
         incurred in the ordinary course of business.

                  (i) Statutory Liens or landlords', maritime, carriers',
         warehouseman's, mechanics', suppliers', materialmen's, repairmen's or
         other like Liens arising in the ordinary course of business and with
         respect to amounts not yet delinquent or being contested in good faith
         by appropriate proceedings.

                  (j) Liens incidental to the conduct by the Parent Borrower or
         its Restricted Subsidiaries of Multi-Client Surveys (including without
         limitation, licenses, participation rights, rebate or revenue sharing
         obligations, joint ownership, or similar encumbrances), provided that
         such Liens have not arisen in connection with the incurrence of Debt.

                  (k) Any extension, renewal or replacement, in whole or in
         part, of any Lien described in the foregoing Subsections (a) through
         (j); provided that any such extension, renewal or replacement is no
         more restrictive in any material respect than the Lien so extended,
         renewed or replaced and does not extend to any additional property or
         assets.

                  Section 7.2 Indebtedness. The Borrowers will not, and will not
permit any other Company to, incur, create, assume or permit to exist any
indebtedness or liability on account of deposits or advances or any indebtedness
for borrowed money or letters of credit issued on any Borrower's behalf, or any
other indebtedness or liability evidenced by notes, bonds, debentures or similar
obligations, except:

                  (a) indebtedness arising hereunder;

                  (b) indebtedness of a Company in existence on the date hereof
         and indebtedness that a Company intends to incur within the next three
         (3) months, as described in Schedule 7.2 hereto;

                  (c) indebtedness relating to Permitted Liens; and

                  (d) Debt of the Parent Borrower or any Restricted Subsidiary
         in respect of Hedging Obligations incurred in the ordinary course of
         business.





                                      -46-
Eagle Geophysical Credit Agreement 
<PAGE>   51

                  Section 7.3 Guaranties. No Borrower will, and will not permit
any Other Company to, assume, guarantee, endorse or otherwise become directly or
contingently liable in connection with any obligations of any other Person,
except:

                  (a) the endorsement of negotiable instruments by a Company for
         deposit or collection or similar transactions in the ordinary course of
         business; and

                  (b) guaranties, endorsements and other direct or contingent
         liabilities in connection with the obligations of other Persons, in
         existence on the date hereof and listed in Schedule 7.2 hereto.

                  Section 7.4 Investments and Subsidiaries.

                  (a) The Borrowers will not, and will not permit any other
         Company to, purchase or hold beneficially any stock or other securities
         or evidences of indebtedness of, make or permit to exist any loans or
         advances to, or make any investment or acquire any interest whatsoever
         in, any other Person, including specifically but without limitation any
         partnership or joint venture, except:

                           (i) investments in direct obligations of the United
                  States of America or any agency or instrumentality thereof
                  whose obligations constitute full faith and credit obligations
                  of the United States of America having a maturity of one year
                  or less, commercial paper issued by U.S. corporations rated
                  "A-1" or "A-2" by Standard & Poors Corporation or "P-1" or
                  "P-2" by Moody's Investors Service or certificates of deposit
                  or bankers' acceptances having a maturity of one year or less
                  issued by members of the Federal Reserve System having
                  deposits in excess of $100,000,000 (which certificates of
                  deposit or bankers' acceptances are fully insured by the
                  Federal Deposit Insurance Corporation);

                           (ii) investments in Subsidiaries existing on the date
                  hereof;

                           (iii) travel advances or loans to a Company's
                  officers and employees not exceeding at any one time an
                  aggregate of $50,000; and

                           (iv) advances in the form of progress payments,
                  prepaid rent not exceeding three (3) months or security
                  deposits.

                  (b) The Borrowers will not, and will not permit any other
         Company to, create or permit to exist any Subsidiary, other than the
         Subsidiaries in existence on the date hereof and listed in Schedule
         5.5.

                  Section 7.5 Dividends. The Parent Borrower will not declare or
pay any dividends (other than dividends payable solely in stock of the Parent
Borrower) on any class of its stock or make any payment on account of the
purchase, redemption or other retirement of any shares of such stock or make any
distribution in respect thereof, either directly or indirectly.



                                      -47-
Eagle Geophysical Credit Agreement 
<PAGE>   52

                  Section 7.6 Sale or Transfer of Assets; Suspension of Business
Operations. No Borrower will, or will permit any other Company to, sell, lease,
assign, transfer or otherwise dispose of (i) the stock of any Subsidiary, (ii)
all or a substantial part of its assets, or (iii) any Collateral or Guarantor
Collateral or any interest therein (whether in one transaction or in a series of
transactions) to any other Person other than the sale of Inventory in the
ordinary course of business, and no Borrower will, or will permit any other
Company to, liquidate, dissolve or suspend business operations. The Borrowers
will not, and will not permit any other Company to, in any manner transfer any
property without prior or present receipt of full and adequate consideration;
provided, however, that the Borrowers may sell for nominal consideration or
abandon all equipment installed on the ship "Discoverer".

                  Section 7.7 Intellectual Property. No Borrower will, or will
permit any other Company to, sell, assign or grant licenses to use, any of its
applications for patents, patents, copyrights, trademarks, trade secrets, trade
names or other intellectual property to any other Person without prior or
present receipt of full and adequate consideration.

                  Section 7.8 Consolidation and Merger; Asset Acquisitions. The
Parent Borrower will not consolidate with or merge into any Person, or permit
any other Person to merge into it, or acquire (in a transaction analogous in
purpose or effect to a consolidation or merger) all or substantially all the
assets of any other Person.

                  Section 7.9 Sale and Leaseback. No Borrower will, or will
permit any other Company to, enter into any arrangement, directly or indirectly,
with any other Person whereby such Company shall sell or transfer any real or
personal property, whether now owned or hereafter acquired, and then or
thereafter rent or lease as lessee such property or any part thereof or any
other property which such Company intends to use for substantially the same
purpose or purposes as the property being sold or transferred.

                  Section 7.10 Restrictions on Nature of Business. No Borrower
will, or will permit any other Company to, engage in any line of business
materially different from that presently engaged in by that Company and no
Borrower will, or will permit any other Company to, purchase, lease or otherwise
acquire assets not related to its business.

                  Section 7.11 Capital Expenditures. The Companies will not
incur or contract to incur Capital Expenditures of more than $37,000,000 in the
aggregate during the fiscal year ending December 31, 1999.

                  Section 7.12 Accounting. The Borrowers will not, and will not
permit any other Company to, adopt any material change in accounting principles
other than as required by GAAP. No Borrower will, or will permit any other
Company to, adopt, permit or consent to any change in its fiscal year.

                  Section 7.13 Discounts, etc. No Borrower will, or permit any
other Company to, after notice from the Lender, grant any discount, credit or
allowance to any customer or accept any return of goods sold, or at any time
(whether before or after notice from the Lender) modify, amend, subordinate,
cancel or terminate the obligation of any account debtor or other obligor of a
Company.



                                      -48-
Eagle Geophysical Credit Agreement 
<PAGE>   53

                  Section 7.14 Defined Benefit Pension Plans. No Borrower will,
or will permit any Company to, adopt, create, assume or become a party to any
defined benefit pension plan, unless disclosed to the Lender pursuant to Section
5.12.

                  Section 7.15 Other Defaults. No Borrower will, or will permit
any other Company to, permit any breach, default or event of default to occur
under any note, loan agreement, indenture, lease, mortgage, contract for deed,
security agreement or other contractual obligation binding upon it.

                  Section 7.16 Place of Business; Name. Without giving the
Lender 30 days prior written notice, no Borrower will, or will permit any other
Company to, (a) transfer its chief executive office or principal place of
business, or move, relocate, close or sell any business location; (b) permit any
tangible Collateral or Guarantor Collateral or any records pertaining to the
Collateral or Guarantor Collateral to be located in any state or area in which,
in the event of such location, a financing statement covering such Collateral
would be required to be, but has not in fact been, filed in order to perfect the
Security Interest and the Liens granted under the Security Documents and the
Guarantor Documents; and (c) no Borrower will, or will permit any other Company
to, change its name.

                  Section 7.17 Organizational Documents. Without giving the
Lender 30 days prior written notice, no Borrower will, or will permit any other
Company to, amend its articles of incorporation, bylaws, partnership agreement,
limited liability company organizational documents or similar documents in any
manner which would affect the existence, priority or perfection of the Lender's
Liens in each Company's assets or the Lender's ability to enforce its rights and
remedies under this Agreement.

                  Section 7.18 Salaries. No Borrower will, or will permit any
other Company to, pay excessive or unreasonable salaries, bonuses, commissions,
consultant fees or other compensation.

                  Section 7.19 Change of Control. The Parent Borrower will not
permit a Change of Control to occur.

                  Section 7.20 Transactions with Affiliates. No Borrower will,
or will permit any other Company to, enter into any transaction with another
Company or any Affiliate on terms that are less favorable than could be obtained
in an arms-length transaction with a Person that is not an Affiliate or a
Company.

                                  ARTICLE VIII

                     EVENTS OF DEFAULT, RIGHTS AND REMEDIES

                  Section 8.1 Events of Default. "Event of Default", wherever
used herein, means any one of the following events:




                                      -49-
Eagle Geophysical Credit Agreement 
<PAGE>   54

                  (a) Default for more than five (5) Banking Days in the payment
         of the Obligations when they become due and payable;


                  (b) Failure to pay for more than five (5) Banking Days any
         amount specified in Section 2.4 relating to the Borrowers' Obligation
         of Reimbursement, or failure to pay immediately when due or upon
         termination of the Credit Facility any amounts required to be paid for
         deposit in the Special Account under Section 2.5;

                  (c) Default for more than five (5) Banking Days in the payment
         of any fees, commissions, costs or expenses required to be paid by the
         Borrowers under this Agreement;

                  (d) Default in the performance of any covenant set forth in
         Section 6.1 for more than 10 (ten) Banking Days.

                  (e) Default in the performance, or breach, of any covenant or
         agreement of the Borrowers contained in this Agreement (other than a
         covenant or agreement a default in whose performance or whose breach is
         elsewhere in this Section specifically dealt with);

                  (f) The senior management (including without limitation, the
         president, the executive vice president, any vice president and the
         chief financial officer) of the Parent Borrower shall change;

                  (g) Any Borrower or any Guarantor shall be or become
         insolvent, or admit in writing its inability to pay its debts as they
         mature, or make an assignment for the benefit of creditors; or any
         Borrower or any Guarantor shall apply for or consent to the appointment
         of any receiver, trustee, or similar officer for it or for all or any
         substantial part of its property; or such receiver, trustee or similar
         officer shall be appointed without the application or consent of such
         Borrower or such Guarantor, as the case may be; or any Borrower or any
         Guarantor shall institute (by petition, application, answer, consent or
         otherwise) any bankruptcy, insolvency, reorganization, arrangement,
         readjustment of debt, dissolution, liquidation or similar proceeding
         relating to it under the laws of any jurisdiction; or any such
         proceeding shall be instituted (by petition, application or otherwise)
         against any Borrower or any such Guarantor; or any judgment, writ,
         warrant of attachment or execution or similar process shall be issued
         or levied against a substantial part of the property of any Borrower or
         any Guarantor;

                  (h) A petition shall be filed by a Borrower or any Guarantor
         under the United States Bankruptcy Code naming a Borrower or such
         Guarantor as debtor;

                  (i) A petition shall be filed against a Borrower or any
         Guarantor under the United States Bankruptcy Code naming a Borrower or
         a Guarantor as debtor and (A) the applicable Borrower or Guarantor
         shall fail to oppose such petition for more than five (5) days or (B)
         an order for relief shall be entered or (C) 60 days shall elapse from
         the date such petition is filed;



                                      -50-
Eagle Geophysical Credit Agreement 
<PAGE>   55

                  (j) Any representation or warranty made by a Borrower in this
         Agreement, by any Guarantor in any guaranty delivered to the Lender, or
         by a Borrower (or any of its officers) or any Guarantor in any
         agreement, certificate, instrument or financial
         statement or other statement contemplated by or made or delivered
         pursuant to or in connection with this Agreement or any such guaranty
         shall prove to have been incorrect in any material respect when deemed
         to be effective;

                  (k) The rendering against any Borrower of a final judgment,
         decree or order for the payment of money in excess of $250,000 for any
         single occurrence or $500,000 in the aggregate, and the continuance of
         such judgment, decree or order unsatisfied and in effect for any period
         of 30 consecutive days without a stay of execution;

                  (l) A default under any bond, debenture, note or other
         evidence of indebtedness exceeding $100,000 of any Borrower owed to any
         Person other than the Lender (including without limitation the Senior
         Notes), or under any indenture or other instrument under which any such
         evidence of indebtedness has been issued or by which it is governed, or
         under any lease, and the expiration of the applicable period of grace,
         if any, specified in such evidence of indebtedness, indenture, other
         instrument or lease;

                  (m) Any Reportable Event, which the Lender determines in good
         faith might constitute grounds for the termination of any Plan or for
         the appointment by the appropriate United States District Court of a
         trustee to administer any Plan, shall have occurred and be continuing
         30 days after written notice to such effect shall have been given to
         the Parent Borrower by the Lender; or a trustee shall have been
         appointed by an appropriate United States District Court to administer
         any Plan; or the Pension Benefit Guaranty Corporation shall have
         instituted proceedings to terminate any Plan or to appoint a trustee to
         administer any Plan; or any Borrower shall have filed for a distress
         termination of any Plan under Title IV of ERISA; or any Borrower shall
         have failed to make any quarterly contribution required with respect to
         any Plan under Section 412(m) of the Internal Revenue Code of 1986, as
         amended, which the Lender determines in good faith may by itself, or in
         combination with any such failures that the Lender may determine are
         likely to occur in the future, result in the imposition of a Lien on
         any Borrower's assets in favor of the Plan;

                  (n) An event of default shall occur under any Security
         Document or under any other security agreement, mortgage, deed of
         trust, assignment or other instrument or agreement securing any
         obligations of the Borrowers hereunder or under any note;

                  (o) Any Borrower shall liquidate, dissolve, terminate or
         suspend its business operations or otherwise fail to operate its
         business in the ordinary course, or sell all or substantially all of
         its assets, without the Lender's prior written consent;



                                      -51-

Eagle Geophysical Credit Agreement 
<PAGE>   56

                  (p) Any Borrower shall fail to pay, withhold, collect or remit
         any tax or tax deficiency when assessed or due (other than any tax
         deficiency which is being contested in good faith and by proper
         proceedings and for which it shall have set aside on its books adequate
         reserves therefor) or notice of any state or federal tax liens shall be
         filed or issued;

                  (q) Default in the payment of any amount owed by any Borrower
         to the Lender other than any indebtedness arising hereunder;

                  (r) Any Guarantor shall repudiate, purport to revoke or fail
         to perform any such Guarantor's obligations under such Guarantor's
         guaranty in favor of the Lender, any individual Guarantor shall die or
         any other Guarantor shall cease to exist;

                  (s) Any event or circumstance with respect to any Borrower
         shall occur such that the Lender shall believe in good faith that the
         prospect of payment of all or any part of the Obligations or the
         performance by any Borrower under the Loan Documents is impaired or any
         material adverse change in the business or financial condition of any
         Borrower shall occur; or

                  (t) Any breach, default or event of default by or attributable
         to any Affiliate under any agreement between such Affiliate and the
         Lender.

                  Section 8.2 Rights and Remedies. During any Default Period,
the Lender may exercise any or all of the following rights and remedies:

                  (a) the Lender may, by notice to the Parent Borrower, declare
         the Commitment to be terminated, whereupon the same shall forthwith
         terminate;

                  (b) the Lender may, by notice to the Parent Borrower, declare
         the Obligations to be forthwith due and payable, whereupon all
         Obligations shall become and be forthwith due and payable, without
         presentment, notice of dishonor, protest or further notice of any kind,
         all of which the Borrowers hereby expressly waive;

                  (c) the Lender may, without notice to the Parent Borrower and
         without further action, apply any and all money owing by the Lender to
         the Borrowers to the payment of the Obligations;

                  (d) the Lender may make demand upon the Borrowers and,
         forthwith upon such demand, the Borrowers will pay to the Lender in
         immediately available funds for deposit in the Special Account pursuant
         to Section 2.21 an amount equal to the aggregate maximum amount
         available to be drawn under all Letters of Credit then outstanding,
         assuming compliance with all conditions for drawing thereunder;

                  (e) the Lender may exercise and enforce any and all rights and
         remedies available upon default to a secured party under the UCC,
         including, without limitation, the right to take possession of
         Collateral, or any evidence thereof, 




                                      -52-
Eagle Geophysical Credit Agreement 
<PAGE>   57

         proceeding without judicial process or by judicial process (without a
         prior hearing or notice thereof, which the Borrowers hereby expressly
         waive) and the right to sell, lease or otherwise dispose of any or all
         of the Collateral, and, in connection therewith, the Borrowers will on
         demand assemble the Collateral and make it available to the Lender at a
         place to be designated by the Lender which is reasonably convenient to
         both parties;

                  (f) the Lender may exercise and enforce its rights and
         remedies under the Loan Documents; and

                  (g) the Lender may exercise any other rights and remedies
         available to it by law or agreement.

Notwithstanding the foregoing, upon the occurrence of an Event of Default
described in subsections (g) or (h) of Section 8.1, the Obligations shall be
immediately due and payable automatically without presentment, demand, protest
or notice of any kind.

                  Section 8.3 Certain Notices. If notice to the Borrowers of any
intended disposition of Collateral or any other intended action is required by
law in a particular instance, such notice shall be deemed commercially
reasonable if given (in the manner specified in Section 9.3) at least ten
calendar days before the date of intended disposition or other action.

                                   ARTICLE IX

                                  Miscellaneous

                  Section 9.1 No Waiver; Cumulative Remedies. No failure or
delay by the Lender in exercising any right, power or remedy under the Loan
Documents shall operate as a waiver thereof; nor shall any single or partial
exercise of any such right, power or remedy preclude any other or further
exercise thereof or the exercise of any other right, power or remedy under the
Loan Documents. The remedies provided in the Loan Documents are cumulative and
not exclusive of any remedies provided by law.

                  Section 9.2 Amendments, Etc. No amendment, modification,
termination or waiver of any provision of any Loan Document or consent to any
departure by any Borrower therefrom or any release of a Security Interest shall
be effective unless the same shall be in writing and signed by the Lender, and
then such waiver or consent shall be effective only in the specific instance and
for the specific purpose for which given. No notice to or demand on any Borrower
in any case shall entitle any Borrower to any other or further notice or demand
in similar or other circumstances.

                  Section 9.3 Addresses for Notices, Etc. Except as otherwise
expressly provided herein, all notices, requests, demands and other
communications provided for under the Loan Documents shall be in writing and
shall be (a) personally delivered, (b) sent by first class United States mail,
(c) sent by overnight courier of national reputation, or (d) transmitted by


                                      -53-
Eagle Geophysical Credit Agreement 
<PAGE>   58

telecopy, in each case addressed or telecopied to the party to whom notice is
being given at its address or telecopier number as set forth below:

                  If to any Borrower:

                  Eagle Geophysical, Inc.
                  2603 Augusta, 14th Floor
                  Houston Texas 77057
                  Telecopier: 713-243-6281
                  Attention: Richard W. McNairy

                  If to the Lender:

                  Norwest Business Credit, Inc.
                  6100 Bandera Road, Suite SL 100
                  San Antonio, Texas  78238
                  Telecopier: 210-856-8989
                  Attention: Alan Neis

or, as to each party, at such other address or telecopier number as may
hereafter be designated by such party in a written notice to the other party
complying as to delivery with the terms of this Section. All such notices,
requests, demands and other communications shall be deemed to have been given on
(a) the date received if personally delivered, (b) when deposited in the mail if
delivered by mail, (c) the date sent if sent by overnight courier, or (d) the
date of transmission if delivered by telecopy, except that notices or requests
to the Lender pursuant to any of the provisions of Article II shall not be
effective until received by the Lender.

                  Section 9.4 Further Documents. The Borrowers will, and will
cause each other Company to, from time to time execute and deliver or endorse
any and all instruments, documents, conveyances, assignments, security
agreements, financing statements and other agreements and writings that the
Lender may reasonably request in order to secure, protect, perfect or enforce
the Security Interest or the Lender's rights under the Loan Documents and
Guarantor Documents (but any failure to request or assure that a Company
executes, delivers or endorses any such item shall not affect or impair the
validity, sufficiency or enforceability of the Loan Documents, Guarantor
Documents and the Security Interest, regardless of whether any such item was or
was not executed, delivered or endorsed in a similar context or on a prior
occasion).

                  Section 9.5 Collateral. This Agreement does not contemplate a
sale of accounts, contract rights or chattel paper, and, as provided by law, the
Borrowers are entitled to any surplus and shall remain liable for any
deficiency. The Lender's duty of care with respect to Collateral in its
possession (as imposed by law) shall be deemed fulfilled if it exercises
reasonable care in physically keeping such Collateral, or in the case of
Collateral in the custody or possession of a bailee or other third person,
exercises reasonable care in the selection of the bailee or other third person,
and the Lender need not otherwise preserve, 




                                      -54-
Eagle Geophysical Credit Agreement 
<PAGE>   59

protect, insure or care for any Collateral. The Lender shall not be obligated to
preserve any rights any Borrower may have against prior parties, to realize on
the Collateral at all or in any particular manner or order or to apply any cash
proceeds of the Collateral in any particular order of application.


                  Section 9.6 Costs and Expenses. The Borrowers shall pay on
demand all costs and expenses, including (without limitation) reasonable
attorneys' fees, incurred by the Lender in connection with the Obligations, this
Agreement, the Loan Documents, any Letters of Credit, and any other document or
agreement related hereto or thereto, and the transactions contemplated hereby,
including without limitation all such costs, expenses and fees incurred in
connection with the negotiation, preparation, execution, amendment,
administration, performance, collection and enforcement of the Obligations and
all such documents and agreements and the creation, perfection, protection,
satisfaction, foreclosure or enforcement of the Security Interest.

                  Section 9.7 Indemnity. In addition to the payment of expenses
pursuant to Section 9.6, the Borrowers shall indemnify, defend and hold harmless
the Lender, and any of its participants, parent corporations, subsidiary
corporations, affiliated corporations, successor corporations, and all present
and future officers, directors, employees, attorneys and agents of the foregoing
(the "Indemnitees") from and against any of the following (collectively,
"Indemnified Liabilities"):
                           (i) any and all transfer taxes, documentary taxes,
                  assessments or charges made by any governmental authority by
                  reason of the execution and delivery of the Loan Documents or
                  the making of the Advances;

                           (ii) any claims, loss or damage to which any
                  Indemnitee may be subjected if any representation or warranty
                  contained in Section 5.14 proves to be incorrect in any
                  respect or as a result of any violation of the covenant
                  contained in Section 6.4(b); and

                           (iii) any and all other liabilities, losses, damages,
                  penalties, judgments, suits, claims, costs and expenses of any
                  kind or nature whatsoever (including, without limitation, the
                  reasonable fees and disbursements of counsel) in connection
                  with the foregoing and any other investigative, administrative
                  or judicial proceedings, whether or not such Indemnitee shall
                  be designated a party thereto, which may be imposed on,
                  incurred by or asserted against any such Indemnitee, in any
                  manner related to or arising out of or in connection with the
                  making of the Advances and the Loan Documents or the use or
                  intended use of the proceeds of the Advances.

If any investigative, judicial or administrative proceeding arising from any of
the foregoing is brought against any Indemnitee, upon such Indemnitee's request,
the Borrowers, or counsel designated by the Borrowers and satisfactory to the
Indemnitee, will resist and defend such action, suit or proceeding to the extent
and in the manner directed by the Indemnitee, at the Borrowers' sole costs and
expense. Each Indemnitee will use its best efforts to cooperate in the defense
of any such action, suit or proceeding. If the foregoing undertaking to
indemnify,




                                      -55-
Eagle Geophysical Credit Agreement 
<PAGE>   60

defend and hold harmless may be held to be unenforceable because it violates any
law or public policy, the Borrowers shall nevertheless make the maximum
contribution to the payment and satisfaction of each of the Indemnified
Liabilities which is permissible under applicable law. The Borrowers' obligation
under this Section 9.7 shall survive the termination of this Agreement and the
discharge of the Borrowers' other obligations hereunder.

                  Section 9.8 Participants. The Lender and its participants, if
any, are not partners or joint venturers, and the Lender shall not have any
liability or responsibility for any obligation, act or omission of any of its
participants. All rights and powers specifically conferred upon the Lender may
be transferred or delegated to any of the Lender's participants, successors or
assigns. The Lender will not sell any participation interest in the Obligations
to any competitor of the Borrowers or to any financial institution not organized
under the laws of one of the States or the United States of America.

                  Section 9.9 Execution in Counterparts. This Agreement and
other Loan Documents may be executed in any number of counterparts, each of
which when so executed and delivered shall be deemed to be an original and all
of which counterparts, taken together, shall constitute but one and the same
instrument.

                  Section 9.10 Binding Effect; Assignment; Complete Agreement;
Exchanging Information. The Loan Documents shall be binding upon and inure to
the benefit of the Borrowers and the Lender and their respective successors and
assigns, except that the Borrowers shall not have the right to assign their
rights thereunder or any interest therein without the Lender's prior written
consent. This Agreement, together with the Loan Documents, comprises the
complete and integrated agreement of the parties on the subject matter hereof
and supersedes all prior agreements, written or oral, on the subject matter
hereof. Without limiting the Lender's right to share information regarding the
Borrowers and their Affiliates with the Lender's participants, accountants,
lawyers and other advisors, the Lender, Wells Fargo & Company, and all direct
and indirect subsidiaries of Wells Fargo & Company, may exchange any and all
information they may have in their possession regarding the Borrowers and their
Affiliates, and the Borrowers waive any right of confidentiality they may have
with respect to such exchange of such information.

                  Section 9.11 Severability of Provisions. Any provision of this
Agreement which is prohibited or unenforceable shall be ineffective to the
extent of such prohibition or unenforceability without invalidating the
remaining provisions hereof.

                  Section 9.12 Headings. Article and Section headings in this
Agreement are included herein for convenience of reference only and shall not
constitute a part of this Agreement for any other purpose.

                  Section 9.13 Governing Law; Jurisdiction, Venue; Waiver of
Jury Trial. THE PARTIES AGREE THAT THE LAW OF THE STATE OF MINNESOTA (OTHER THAN
CONFLICT OF LAWS RULES OF THE STATE OF MINNESOTA) SHALL BE APPLICABLE TO AND
GOVERN ALL ASPECTS OF THIS TRANSACTION 




                                      -56-
Eagle Geophysical Credit Agreement 
<PAGE>   61

AND, WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, THE PARTIES AGREE THAT
ALL DOCUMENTS AND AGREEMENTS EXECUTED AND DELIVERED IN CONNECTION WITH THIS
AGREEMENT INCLUDING, WITHOUT LIMITATION, ALL MATTERS PERTAINING TO THE VALIDITY
OR ENFORCEABILITY OF SUCH DOCUMENTS AND AGREEMENTS AS WELL AS ALL MATTERS
PERTAINING TO THE INTERPRETATION OR CONSTRUCTION OF SUCH DOCUMENTS AND
AGREEMENTS, SHALL BE DETERMINED UNDER AND GOVERNED BY THE LAWS (OTHER THAN
CONFLICT OF LAWS RULES) OF THE STATE OF MINNESOTA. FURTHER, THE PARTIES AGREE
THAT THE TRANSACTIONS CONTEMPLATED BY THE LOAN DOCUMENTS AND THE SUBJECT MATTER
OF SUCH TRANSACTIONS BEAR A REASONABLE RELATION TO THE STATE OF MINNESOTA. THE
PARTIES HERETO HEREBY (I) CONSENT TO THE PERSONAL JURISDICTION OF THE STATE AND
FEDERAL COURTS LOCATED IN THE STATE OF MINNESOTA IN CONNECTION WITH ANY
CONTROVERSY RELATED TO THIS AGREEMENT; (II) WAIVE ANY ARGUMENT THAT VENUE IN ANY
SUCH FORUM IS NOT CONVENIENT, (III) AGREE THAT ANY LITIGATION INITIATED BY THE
LENDER OR ANY BORROWER IN CONNECTION WITH THIS AGREEMENT OR THE OTHER LOAN
DOCUMENTS SHALL BE VENUED IN EITHER THE DISTRICT COURT OF HENNEPIN COUNTY,
MINNESOTA, OR THE UNITED STATES DISTRICT COURT, DISTRICT OF MINNESOTA, FOURTH
DIVISION; AND (IV) AGREE THAT A FINAL JUDGMENT IN ANY SUCH SUIT, ACTION OR
PROCEEDING SHALL BE CONCLUSIVE AND MAY BE ENFORCED IN OTHER JURISDICTIONS BY
SUIT ON THE JUDGMENT OR IN ANY OTHER MANNER PROVIDED BY LAW. THE PARTIES WAIVE
ANY RIGHT TO TRIAL BY JURY IN ANY ACTION OR PROCEEDING BASED ON OR PERTAINING TO
THIS AGREEMENT.


                                      -57-
Eagle Geophysical Credit Agreement 
<PAGE>   62



                  THE PARTIES WAIVE ANY RIGHT TO TRIAL BY JURY IN ANY
ACTION OR PROCEEDING BASED ON OR PERTAINING TO THIS
AGREEMENT.

                  IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be executed by their respective officers thereunto duly authorized
as of the date first above written.

NORWEST BUSINESS CREDIT, INC.                EAGLE GEOPHYSICAL, INC., EAGLE
                                             GEOPHYSICAL ONSHORE, INC., EAGLE
                                             GEOPHYSICAL OFFSHORE, INC.,
                                             EAGLE GEOPHYSICAL ROYALTY, INC. 
By /s/ Alan Neis                             (F/K/A EAGLE GEOPHYSICAL        
   --------------------------------------    LEASING, INC.), EAGLE GEOPHYSICAL
   Alan Neis                                 DE MEXICO, INC., EAGLE FRONT END
   Its Vice President                        SERVICES, INC., EAGLE GEOPHYSICAL
                                             MANAGEMENT, INC., EAGLE 
                                             GEOPHYSICAL GOM, INC., EAGLE
                                             GEOPHYSICAL DE COLOMBIA, INC.,
                                             EAGLE GEOPHYSICAL DE PERU, INC.,
                                             AUSTRAL HORIZON, INC., ATLANTIC
                                             HORIZON, INC., EAGLE GEOPHYSICAL
                                             DE BOLIVIA, INC., EAGLE
                                             GEOPHYSICAL DE ARGENTINA, INC.
                                             AND EAGLE GEOPHYSICAL DE
                                             ECUADOR, INC.



                                             By  /s/ Richard W. McNairy   
                                                 ------------------------------
                                                 Richard W. McNairy
                                                 Its Vice President

EAGLE FRONT END SERVICES, LTD.

By  EAGLE GEOPHYSICAL
    MANAGEMENT, INC.
    Its General Partner

    By /s/ Richard W. McNairy                      
       ----------------------------------       
       Richard W. McNairy
       Its Vice President







                                      -58-

Eagle Geophysical Credit Agreement 
<PAGE>   63


                         Table of Exhibits and Schedules

      Exhibit A                    Form of Revolving Note

      Exhibit B                    Form of Notice of Borrowing

      Exhibit C                    Form of Notice of Conversion

      Exhibit D                    Form Of Notice to Continue Eurodollar Rate
                                        Advance

      Exhibit E                    Form of Compliance Certificate

      Exhibit F                    Premises





      Schedule 2.24                Sources and Uses of Funds

      Schedule 3.6                 Financing Statement Information

      Schedule 5.1                 Trade Names, Chief Executive Office, 
                                   Principal Place of Business, and Locations
                                   of Collateral

      Schedule 5.2                 Capital Stock

      Schedule 5.5                 Subsidiaries

      Schedule 7.1                 Permitted Liens

      Schedule 7.2                 Permitted Indebtedness and Guaranties







<PAGE>   64


                   EXHIBIT A TO CREDIT AND SECURITY AGREEMENT

                                 REVOLVING NOTE

 $20,000,000                                                  San Antonio, Texas
                                                                  March 26, 1999

                  For value received, the undersigned, EAGLE GEOPHYSICAL, INC.,
a Delaware corporation (the "Borrower"), hereby promises to pay on the
Termination Date under the Credit Agreement (defined below), to the order of
Norwest Business Credit, Inc., a Minnesota corporation (the "Lender"), at its
main office in Minneapolis, Minnesota, or at any other place designated at any
time by the holder hereof, in lawful money of the United States of America and
in immediately available funds, the principal sum of Twenty Million Dollars and
No Cents ($20,000,000) or, if less, the aggregate unpaid principal amount of all
Revolving Advances made by the Lender to the Borrowers under the Credit
Agreement (defined below) together with interest on the principal amount
hereunder remaining unpaid from time to time, computed on the basis of the
actual number of days elapsed and a 360-day year, from the date hereof until
this Note is fully paid at the rate from time to time in effect under the Credit
and Security Agreement of even date herewith (as the same may hereafter be
amended, supplemented or restated from time to time, the "Credit Agreement") by
and between the Lender and the Borrowers. The principal hereof and interest
accruing thereon shall be due and payable as provided in the Credit Agreement.
This Note may be prepaid only in accordance with the Credit Agreement.

                  This Note is issued pursuant, and is subject, to the Credit
Agreement, which provides, among other things, for acceleration hereof. This
Note is the Revolving Note referred to in the Credit Agreement. This Note is
secured, among other things, pursuant to the Credit Agreement and the Security
Documents as therein defined, and may now or hereafter be secured by one or more
other security agreements, mortgages, deeds of trust, assignments or other
instruments or agreements.

                  The Borrowers hereby agree to pay all costs of collection,
including attorneys' fees and legal expenses in the event this Note is not paid
when due, whether or not legal proceedings are commenced.


<PAGE>   65




                  Presentment or other demand for payment, notice of dishonor
and protest are expressly waived.

EAGLE FRONT END SERVICES, LTD.                 EAGLE GEOPHYSICAL, INC., EAGLE   
                                               GEOPHYSICAL ONSHORE, INC., EAGLE 
By EAGLE GEOPHYSICAL                           GEOPHYSICAL OFFSHORE, INC.,      
     MANAGEMENT, INC.                          EAGLE GEOPHYSICAL ROYALTY, INC.  
     Its General Partner                       (F/K/A EAGLE GEOPHYSICAL         
                                               LEASING, INC.), EAGLE GEOPHYSICAL
     By                                        DE MEXICO, INC., EAGLE FRONT END 
         ------------------------------        SERVICES, INC., EAGLE GEOPHYSICAL
         Richard W. McNairy                    MANAGEMENT, INC., EAGLE          
         Its Vice President                    GEOPHYSICAL GOM, INC., EAGLE     
                                               GEOPHYSICAL DE COLOMBIA, INC.,   
                                               EAGLE GEOPHYSICAL DE PERU, INC., 
                                               AUSTRAL HORIZON, INC., ATLANTIC  
                                               HORIZON, INC., EAGLE GEOPHYSICAL 
                                               DE BOLIVIA, INC., EAGLE          
                                               GEOPHYSICAL DE ARGENTINA, INC.   
                                               AND EAGLE GEOPHYSICAL DE         
                                               ECUADOR, INC.                    
                                                                                
                                               

                                               By 
                                                 ------------------------------
                                                  Richard W. McNairy
                                                  Its Vice President




Eagle Geophysical - Revolving Promissory Note        


- -2-


<PAGE>   66


                   EXHIBIT B TO CREDIT AND SECURITY AGREEMENT 

                               NOTICE OF BORROWING

                             _____________, _______

TO:               Norwest Business Credit, Inc.
                  6100 Bandera Road, Suite SL 100
                  San Antonio, Texas  78238
                  Telecopier: 210-856-8989
                  Attention: Mr. Alan Neis

                  We refer to that certain Credit and Security Agreement dated
as of March 26, 1999 (as amended or modified to date, the "Credit and Security
Agreement") by and among Eagle Geophysical, Inc., Eagle Geophysical Onshore,
Inc, Eagle Geophysical Offshore, Inc., Eagle Geophysical Royalty, Inc. (f/k/a
Eagle Geophysical Leasing, Inc.), Eagle Geophysical de Mexico, Inc., Eagle Front
End Services, Inc., Eagle Geophysical Management, Inc., Eagle Geophysical GOM,
Inc., Eagle Front End Services, Ltd., Eagle Geophysical de Colombia, Inc., Eagle
Geophysical de Peru, Inc., Austral Horizon, Inc., Atlantic Horizon, Inc., Eagle
Geophysical de Bolivia, Inc., Eagle Geophysical de Argentina, Inc. and Eagle
Geophysical de Ecuador, Inc. and Norwest Business Credit, Inc. Capitalized terms
used herein but not otherwise defined shall have the same meanings assigned to
them in the Credit and Security Agreement.

                  Pursuant to Section 2.7 of the Credit and Security Agreement,
we hereby request or confirm our request for an Advance on the date, of the
type(s) and in the amount(s) specified below.

<TABLE>
<CAPTION>
                                                                         Interest Period
                                                                           (Eurodollar
Borrowing Request       Type of Advance         Date of Borrowing        Advances Only)
- -----------------       ---------------         -----------------       -----------------
<S>                     <C>                     <C>                     <C>
$
</TABLE>

                                                EAGLE GEOPHYSICAL, INC.



                                                By 
                                                  ------------------------------

- --------------------------------------------------------------------------------
                                                  Its
                                                     ---------------------------


<PAGE>   67


                   EXHIBIT C TO CREDIT AND SECURITY AGREEMENT 

                NOTICE OF CONVERSION TO EURODOLLAR RATE ADVANCES


                             _____________, _______

TO:               Norwest Business Credit, Inc.
                  6100 Bandera Road, Suite SL 100
                  San Antonio, Texas  78238
                  Telecopier: 210-856-8989
                  Attention: Mr. Alan Neis

                  We refer to that certain Credit and Security Agreement dated
as of March 26, 1999 (as amended or modified to date, the "Credit and Security
Agreement") by and among Eagle Geophysical, Inc., a Delaware corporation, Eagle
Geophysical Onshore, Inc, Eagle Geophysical Offshore, Inc., Eagle Geophysical
Royalty, Inc. (f/k/a Eagle Geophysical Leasing, Inc.), Eagle Geophysical de
Mexico, Inc., Eagle Front End Services, Inc., Eagle Geophysical Management,
Inc., Eagle Geophysical GOM, Inc., Eagle Front End Services, Ltd., Eagle
Geophysical de Colombia, Inc., Eagle Geophysical de Peru, Inc., Austral Horizon,
Inc., Atlantic Horizon, Inc., Eagle Geophysical de Bolivia, Inc., Eagle
Geophysical de Argentina, Inc. and Eagle Geophysical de Ecuador, Inc. and
Norwest Business Credit, Inc. Capitalized terms used herein but not otherwise
defined shall have the same meanings assigned to them in the Credit and Security
Agreement.
                  Pursuant to Section 2.8 of the Credit and Security Agreement,
we hereby request or confirm our request that Floating Rate Advances in the
aggregate amounts specified below be converted on the date(s) and for the
Interest Period(s) specified below.

<TABLE>
<CAPTION>

    Amount of Floating Rate
    Advances To Be Converted            Date of Conversion            Interest Period
- ----------------------------------    -----------------------      --------------------
<S>                                   <C>                          <C>
$

</TABLE>

                                             EAGLE GEOPHYSICAL, INC.

                                             By 
                                               --------------------------------
                                               Its 
                                                  -----------------------------


                                       -1-
Term Note


<PAGE>   68



                   EXHIBIT D TO CREDIT AND SECURITY AGREEMENT

                      NOTICE TO CONTINUE EURODOLLAR FUNDING


                             _____________, _______

TO:               Norwest Business Credit, Inc.
                  6100 Bandera Road, Suite SL 100
                  San Antonio, Texas  78238
                  Telecopier: 210-856-8989
                  Attention: Mr. Alan Neis

                  We refer to that certain Credit and Security Agreement dated
as of March 26, 1999 (as amended or modified to date, the "Credit and Security
Agreement") by and among Eagle Geophysical, Inc., a Delaware corporation, Eagle
Geophysical Onshore, Inc, Eagle Geophysical Offshore, Inc., Eagle Geophysical
Royalty, Inc. (f/k/a Eagle Geophysical Leasing, Inc.), Eagle Geophysical de
Mexico, Inc., Eagle Front End Services, Inc., Eagle Geophysical Management,
Inc., Eagle Geophysical GOM, Inc., Eagle Front End Services, Ltd., Eagle
Geophysical de Colombia, Inc., Eagle Geophysical de Peru, Inc., Austral Horizon,
Inc., Atlantic Horizon, Inc., Eagle Geophysical de Bolivia, Inc., Eagle
Geophysical de Argentina, Inc. and Eagle Geophysical de Ecuador, Inc. and
Norwest Business Credit, Inc. Capitalized terms used herein but not otherwise
defined shall have the same meanings assigned to them in the Credit and Security
Agreement.
                  Pursuant to Section 2.9 of the Credit and Security Agreement,
we hereby request or confirm our request that Eurodollar Rate Advances in the
aggregate amount(s) specified below be renewed on the date(s) and for the
Interest Period(s) specified below.

<TABLE>
<CAPTION>
     Amount of Eurodollar Rate                   Date of
      Advances to be Renewed             Expiring Interest Period          New Interest Period
- ------------------------------------  -----------------------------     ------------------------
<S>                                   <C>                               <C>
$
</TABLE>



                                            EAGLE GEOPHYSICAL, INC.



                                            By 
                                              ---------------------------------

- -------------------------------------------------------------------------------
                                              Its
                                                 ------------------------------



                                                                               2
<PAGE>   69









                   EXHIBIT E TO CREDIT AND SECURITY AGREEMENT

                             COMPLIANCE CERTIFICATE

To:                        Alan Neis
                           Norwest Business Credit, Inc.

Date:                      __________________, 199___

Subject:                   Eagle Geophysical, Inc.
                           Financial Statements

                  In accordance with our Credit and Security Agreement dated as
of March 26, 1999 (the "Credit Agreement"), attached are the financial
statements of Eagle Geophysical, Inc. (the "Parent Borrower") as of and for
________________, 19___ (the "Reporting Date") and the year-to-date period then
ended (the "Current Financials"). All terms used in this certificate have the
meanings given in the Credit Agreement.

                  I certify that the Current Financials have been prepared in
accordance with GAAP, subject to year-end audit adjustments, and fairly present
the Parent Borrower's financial condition and the results of its operations as
of the date thereof.

Events of Default. (Check one):

                  [ ]      The undersigned does not have knowledge of the
                           occurrence of a Default or Event of Default under the
                           Credit Agreement.

                  [ ]      The undersigned has knowledge of the occurrence of a
                           Default or Event of Default under the Credit
                           Agreement and attached hereto is a statement of the
                           facts with respect to thereto. The Borrower
                           acknowledges that pursuant to Section 2.14(c) the
                           Lender may impose the Default Rate at any time during
                           the resulting Default Period.



<PAGE>   70






Financial Covenants. I further hereby certify as follows:

                  1. Minimum Consolidated EBITDA Coverage Ratio. Pursuant to
         Section 6.14 of the Credit Agreement, as of the Reporting Date, the
         Parent Borrower's Consolidated EBITDA Coverage Ratio was _____ to 1.00
         which [ ] satisfies [ ] does not satisfy the requirement that such 
         ratio be no less than _____ to 1.00 on the Reporting Date as set forth
         below:

<TABLE>
<CAPTION>
                                                   Minimum Consolidated
                    Month Ending                   EBITDA Coverage Ratio
           ---------------------------------    --------------------------    
<S>                                             <C>
                   March 31, 1999                            1.50 to 1.00
                   April 30, 1999                            1.50 to 1.00
                    May 31, 1999                             1.50 to 1.00
                   June 30, 1999                             1.45 to 1.00
                   July 31, 1999                             1.45 to 1.00
                  August 31, 1999                            1.45 to 1.00
                September 30, 1999                           1.30 to 1.00
                 October 31, 1999                            1.30 to 1.00
                 November 30, 1999                           1.30 to 1.00
              December 31, 1999 and                          1.50 to 1.00
                    thereafter                 
</TABLE>



                  2. Minimum Consolidated Modified Tangible Net Worth. Pursuant
         to Section 6.15 of the Credit Agreement, as of the Reporting Date, the
         Parent Borrower's Consolidated Modified Tangible Net Worth was
         $____________, which [ ] satisfies [ ] does not satisfy the requirement
         that such amount be not less than $57,500,000 plus the amount of
         positive net income for each fiscal year ending after December 31,
         1998.

                  3. Minimum Consolidated Current Ratio. Pursuant to Section
         6.14 of the Credit Agreement, as of the Reporting Date, the Parent
         Borrower's Consolidated Current Ratio was _____ to 1.00 which [ ]
         satisfies [ ] does not satisfy the requirement that such ratio be no
         less than __________ to 1.0 on the Reporting Date as set forth below:

<TABLE>
<CAPTION>
                                             Minimum Consolidated
          Fiscal Quarter Ending                 Current Ratio  
     -------------------------------     ---------------------------
<S>                                      <C>
       March 31, 1999                       0.95 to 1.00
       June 30, 1999                        0.95 to 1.00
       September  30, 1999                  1.00 to 1.00
       December 31, 1999 and                1.10 to 1.00 
       thereafter                   
</TABLE>



Compliance Certificate                  -2-



<PAGE>   71


                  4. Capital Expenditures. Pursuant to Section 7.11 of the
         Credit Agreement, for the year-to-date period ending on the Reporting
         Date, the Borrowers have expended or contracted to expend during the
         _____________ year ended ______________, 199___, for Capital
         Expenditures, $__________________ in the aggregate and at most
         $______________ in any one transaction, which [ ] satisfies [ ] does
         not satisfy the requirement that such expenditures not exceed
         $__________ in the aggregate and $___________ for any one transaction
         during such year.

                  Attached hereto are all relevant facts in reasonable detail to
evidence, and the computations of the financial covenants referred to above.
These computations were made in accordance with GAAP.

                                            EAGLE GEOPHYSICAL, INC.



                                            By
                                              --------------------------------- 
                                              Its 
                                                 ------------------------------



Compliance Certificate                   -3-



<PAGE>   72



                   EXHIBIT F TO CREDIT AND SECURITY AGREEMENT

                                    Premises

The Premises referred to in the Credit and Security Agreement are legally
described as follows:



                         [To be completed by Borrowers]



<PAGE>   1
                                                                    EXHIBIT 10.2



                                 REVOLVING NOTE

$20,000,000                                                   San Antonio, Texas
                                                                  March 26, 1999

                  For value received, the undersigned, EAGLE GEOPHYSICAL, INC.,
a Delaware corporation (the "Borrower"), hereby promises to pay on the
Termination Date under the Credit Agreement (defined below), to the order of
Norwest Business Credit, Inc., a Minnesota corporation (the "Lender"), at its
main office in Minneapolis, Minnesota, or at any other place designated at any
time by the holder hereof, in lawful money of the United States of America and
in immediately available funds, the principal sum of Twenty Million Dollars and
No Cents ($20,000,000) or, if less, the aggregate unpaid principal amount of all
Revolving Advances made by the Lender to the Borrowers under the Credit
Agreement (defined below) together with interest on the principal amount
hereunder remaining unpaid from time to time, computed on the basis of the
actual number of days elapsed and a 360-day year, from the date hereof until
this Note is fully paid at the rate from time to time in effect under the Credit
and Security Agreement of even date herewith (as the same may hereafter be
amended, supplemented or restated from time to time, the "Credit Agreement") by
and between the Lender and the Borrowers. The principal hereof and interest
accruing thereon shall be due and payable as provided in the Credit Agreement.
This Note may be prepaid only in accordance with the Credit Agreement.

                  This Note is issued pursuant, and is subject, to the Credit
Agreement, which provides, among other things, for acceleration hereof. This
Note is the Revolving Note referred to in the Credit Agreement. This Note is
secured, among other things, pursuant to the Credit Agreement and the Security
Documents as therein defined, and may now or hereafter be secured by one or more
other security agreements, mortgages, deeds of trust, assignments or other
instruments or agreements.

                  The Borrowers hereby agree to pay all costs of collection,
including attorneys' fees and legal expenses in the event this Note is not paid
when due, whether or not legal proceedings are commenced.


<PAGE>   2



                  Presentment or other demand for payment, notice of dishonor
and protest are expressly waived.

                                EAGLE FRONT END SERVICES, LTD.

                                By EAGLE GEOPHYSICAL MANAGEMENT, INC.
                                     Its General Partner

                                By /s/ Richard W. McNairy  
                                   ---------------------------------
                                Richard W. McNairy
                                Its Vice President
                                                                              
                                EAGLE GEOPHYSICAL, INC., EAGLE GEOPHYSICAL
                                ONSHORE, INC., EAGLE GEOPHYSICAL OFFSHORE, INC.,
                                EAGLE GEOPHYSICAL ROYALTY, INC. (F/K/A EAGLE
                                GEOPHYSICAL LEASING, INC.), EAGLE GEOPHYSICAL
                                DE MEXICO, INC., EAGLE FRONT END SERVICES, INC.,
                                EAGLE GEOPHYSICAL MANAGEMENT, INC., EAGLE
                                GEOPHYSICAL GOM, INC., EAGLE GEOPHYSICAL DE
                                COLOMBIA, INC., EAGLE GEOPHYSICAL DE PERU, INC.,
                                AUSTRAL HORIZON, INC., ATLANTIC HORIZON, INC.,
                                EAGLE GEOPHYSICAL DE BOLIVIA, INC., EAGLE
                                GEOPHYSICAL DE ARGENTINA, INC. AND EAGLE
                                GEOPHYSICAL DE ECUADOR, INC.



                                By /s/ Richard W. McNairy  
                                   ---------------------------------
                                Richard W. McNairy
                                Its Vice President

<PAGE>   1
                                                                    EXHIBIT 10.3

                               SEVERANCE AGREEMENT


         This Severance Agreement (this "Agreement"), dated as of April 16,
1999, is among Gerald Martin Harrison of Kent, England, an individual
(hereinafter sometimes referred to as "Harrison"), and Eagle Geophysical, Inc.,
a Delaware corporation (hereinafter sometimes referred to as the "Company") and
Exploration Holdings Limited, a company organized under the laws of the United
Kingdom (hereinafter sometimes referred to as "EHL"):

         WHEREAS, Harrison entered into an Employment Agreement with EHL which
was amended on July 3, 1996, August 11, 1997 and April 1, 1998 (hereinafter
referred to collectively as the "Employment Agreement");

         WHEREAS, all capitalized terms used herein but not otherwise defined
herein shall have the meanings ascribed to such terms in the Employment
Agreement;

         WHEREAS, the Company indirectly owns all of the issued and outstanding
shares of EHL;

         WHEREAS, in addition to his duties and obligations under the Employment
Agreement, Harrison has served as a member of the Board of Directors and
Executive Vice President of the Company since prior to its initial public
offering of Company stock in August 1997; and

         WHEREAS, the parties hereto desire that the employment of Harrison
under the Employment Agreement be terminated and that Harrison confirm his
resignation as an officer and director of the Company and its subsidiaries,
including EHL, on the terms set forth herein.

         NOW, THEREFORE, the parties hereto, in consideration of the mutual
agreements and covenants set forth in this Agreement, hereby agree as follows:

         1. TERMINATION OF EMPLOYMENT AGREEMENT. Harrison and EHL hereby
terminate the Employment Agreement as of the date hereof and this Agreement
supercedes in all respects the terms of the Employment Agreement. Except as
otherwise provided herein, all provisions of the Employment Agreement, including
those which by their terms survive the termination of the Employment Agreement,
are hereby terminated in all respects. From and after the date hereof, Harrison
shall cease to be an employee, officer and director of the Company and any
affiliate and subsidiary of the Company including but not limited to EHL,
Horizon Exploration Limited, a company organized under the law of the United
Kingdom and Energy Research International, a company organized under the laws of
the Cayman Islands (hereinafter sometimes referred to collectively as the
"Company and its Subsidiaries").

         2. SEVERANCE PAYMENTS. EHL shall pay Harrison a lump sum of
(pound)100,000 on or before May 24, 1999 (the "Severance Payment"), less any
applicable withholding taxes, by EHL check to be mailed to him at the address
set forth herein. In consideration of the agreement of EHL to make the Severance
Payment, Harrison hereby agrees to the termination of the Employment Agreement
as provided herein.



<PAGE>   2




         3. STOCK OPTIONS. Prior to April 30, 1999, the agreement between
Harrison and the Company with respect to the stock options to purchase 75,000
shares of common stock of Company previously granted to Harrison shall be
amended as follows:

                  (a) the options to purchase 25,000 shares which vested on
         August 11, 1998 shall continue to be exercisable despite the
         termination of Harrison's employment, subject to Harrison complying
         with the terms of this Agreement;

                  (b) the options to purchase 25,000 shares that were to vest on
         August 11, 1999, subject to Harrison's continued employment, will vest
         on such date despite the termination of Harrison's employment, subject
         to Harrison complying with the terms of this Agreement; and

                  (c) the remaining options to purchase 25,000 shares that were
         to vest on August 11, 2000 shall not vest, and shall therefore be
         canceled.

Such options will be exercisable at any time within the period from and after
their vesting and on or before 5:00 p.m., Houston time, on December 31, 2000.

         4. FULL COMPENSATION. Harrison acknowledges that as of the date of this
Agreement, he has received, in full, all amounts of compensation,
reimbursements, vacations, holidays, leaves of absence, allowances, and other
monies, payments, properties and benefits of any kind or nature to which he is
or might have been entitled to receive from EHL by virtue of his employment with
EHL (hereby waiving any accrued vacation not previously taken), and that the
only amount remaining to be paid to Harrison with respect to his employment by
EHL, is as set forth in Section 2 hereof.

         5.       RELEASE OF CLAIMS.

                  (a) In consideration of the agreements of EHL and the Company
         as stated in this Agreement, Harrison hereby agrees to execute this
         Agreement and knowingly and voluntarily releases and waives any and all
         of his rights and claims, if any, on behalf of himself, his heirs,
         executors, administrators, successors and assigns and further agrees
         not to institute any action against EHL and the Company or any
         director, officer, employee, affiliate, or agent of EHL and the
         Company, existing or arising or which may exist or arise under (i) any
         offer of employment letter, oral understandings, employee manual or
         handbook, written employment agreement or contractual arrangement; (ii)
         the Employee Retirement Income Security Act of 1974, as amended, 28
         U.S.C. Sections 1001-1461 (1982); (iii) any federal, state or local
         employment opportunity laws, ordinances, orders or regulations,
         including but not limited to Title VII of the Civil Rights Act of 1964,
         42 U.S.C. Section 2000e et seq., as amended, the Texas Commission on 
         Human Rights Act, Chapter 21 Tex. Lab. Code; (iv) any claims for 
         slander, libel, or defamation; (v) any rights, claims, or causes of
         action for costs, damages, compensatory damages, liquidated damages,
         exemplary damages, punitive damages, injunctive relief, front pay, back
         pay, reinstatement, attorneys' fees, unpaid wages, unpaid vacation,
         bonuses, salary, or expenses, severance pay, bonuses, salary, or
         expenses, including the Texas Pay Day Act; as well as (vi) any claims
         of wrongful discharge or 




                                       2
<PAGE>   3

         constructive discharge; (vii) any claims in tort or contract for
         separation from employment; (viii) any claims for breach of contract
         relating to his employment by EHL and the Company (other than a breach
         of the terms of this Agreement) under any state laws or decisions; (ix)
         any claims or causes of action for assault, assault and battery; (x)
         any claims for infliction of emotional distress, including mental pain
         and suffering, whether statutory or tortious, for him, his heirs,
         executors, legal administrators, successors or assigns, during or by
         reason of his employment or termination thereof with EHL; and (xi) any
         and all similar provisions which are applicable under the laws of the
         United Kingdom; provided, however, that Harrison does not release any
         claim he may have against EHL or the Company for any actual damages
         (other than damages for emotional distress, including mental pain and
         suffering) arising from a breach by EHL or the Company of any provision
         of this Agreement.

                  (b) The Company, on behalf of itself and its subsidiaries,
         affiliates, officers, directors, shareholders, agents, representatives,
         successors and assigns, hereby releases and waives any and all of its
         and their rights and claims, if any, and further agrees not to
         institute any action against Harrison or his heirs, executors,
         administrators, successors and assigns, for any breach of the terms of
         the Employment Agreement (other than this Agreement).

         6. PERSONAL PROPERTY. Except as the parties may otherwise agree,
Harrison shall, prior to April 30, 1999, remove all of his personal effects and
personal belongings from the premises of the Company's offices located in the
United Kingdom, United States of America or elsewhere (hereinafter referred to
collectively as the "Company Offices"). Harrison shall promptly effect a change
of his mailing address from the Company Offices to another mailing address for
purposes of all personal correspondence and deliveries. Harrison agrees and
consents that all business correspondence and deliveries addressed to him in
care of or at the Company Offices and relating to the business of the Company
and its Subsidiaries may be opened by the Company or, if forwarded to Harrison,
shall be promptly returned by Harrison to the Company. Harrison agrees that he
will not remove any written correspondence, memos, reports, manuals, policies,
decisions, data, computer programs and information, or any similar materials
which were prepared either by him or by others that relate to the business of
the Company, and any such material currently in Harrison's possession will be
returned immediately to the Company.

         7. RESIGNATION AS OFFICER AND DIRECTOR. Harrison hereby confirms his
resignation as an officer and director of the Company and its Subsidiaries
effective as of April 16, 1999.

         8. CONTINUED RELATIONS.

                  (a) Harrison agrees not to serve as an expert witness in any
         lawsuit or legal proceeding against the Company, its assigns,
         successors, agents, trustees, directors, officers, general partners,
         limited partners, subsidiaries, affiliates, or employees and shall not
         take any action which the Company might reasonably consider destructive
         or damaging in any way to the goodwill and best interests of the
         Company, its employees, officers, directors, agents, general partners,
         limited partner, subsidiaries or affiliates, except in either case in
         connection with legal proceedings in which Harrison or his successors
         or assigns are adverse to the


                                       3
<PAGE>   4

         Company, its assigns, successors, agents, trustees, directors,
         officers, general partners, limited partners, subsidiaries, affiliates,
         or employees.

                  (b) Harrison and the Company shall not take any actions which
         shall be destructive or damaging in any way to the goodwill or best
         interests of the other.

         9. PRIOR RIGHTS AND OBLIGATIONS. Except as otherwise provided herein,
this Agreement extinguishes all pre-existing rights which Harrison has or may
have, relating to his employment with the Company and its Subsidiaries.

         10. PROPRIETARY AND CONFIDENTIAL INFORMATION. Harrison agrees and
acknowledges that the Company and its Subsidiaries developed, and own
"Proprietary and Confidential Information" which constitutes valuable and unique
property including, without limitation, concepts, ideas, plans, strategies,
analyses, surveys, and proprietary information which relates to the past,
present or anticipated business of the Company and its Subsidiaries. Except as
may be required by law, Harrison agrees that he will not at any time disclose to
others, permit to be disclosed, use, permit to be used, copy, or permit to be
copied, any such Proprietary and Confidential Information (whether or not
developed by him) without the Company's prior written consent. Except as may be
required by law, Harrison further agrees to maintain in confidence any
Proprietary and Confidential Information of the Company and its Subsidiaries
received by him. Proprietary and Confidential Information shall not include (i)
information which becomes generally known through no fault of Harrison, (ii)
information required to be disclosed by any court or governmental authority,
(iii) information received by Harrison in good faith from a third party who
Harrison reasonably believed, after due inquiry, did not acquire such
information on a confidential basis, either directly or indirectly, from the
Company or any of its affiliates, and (iv) information that Harrison can
demonstrate was within his legitimate possession prior to the commencement of
any relationship between Harrison and the Company and its Subsidiaries and their
predecessors.

         11. AGREEMENT NOT TO COMPETE. Harrison acknowledges that (i) the
Company and its Subsidiaries are currently engaged in the business of owning,
managing and operating seismic data acquisition equipment and hiring and
managing crews to operate such equipment, which equipment and crews are
contracted or hired for the purpose of performing geological surveys onshore and
offshore (the "Company Business"); (ii) his employment with the Company has
given him, access to trade secrets of and confidential information concerning
the Company and its Subsidiaries; and (iii) the agreements and covenants
contained in this Section 11 are essential to protect the business and goodwill
of the Company and its Subsidiaries.

                  (a) In consideration for EHL's agreement to make the Severance
         Payment to Harrison, as well as the Company's other agreements herein,
         Harrison agrees that he shall not during the Restricted Period (as
         hereinafter defined) within a one hundred (100) mile radius of the
         Company Offices, including, without limitation, the locations of any
         field offices, directly or indirectly (i) engage or participate in the
         Company Business; or (ii) enter the employ of, or render any other
         services to, any person engaged in the Company Business except as
         permitted hereunder. In addition, during the Restricted Period (as
         hereinafter defined) Harrison agrees that he shall not become
         interested in any person engaged in the Company Business in any
         capacity, including, without limitation, as an individual, partner,




                                       4
<PAGE>   5

         shareholder, lender, officer, director, principal, agent or trustee
         except as permitted hereunder; provided, however, that Harrison may
         own, directly or indirectly, solely as an investment, securities of any
         person traded on any national securities exchange or listed on the
         National Association of Securities Dealers Automated Quotation System
         if Harrison is not a controlling person of, or a member of a group
         which controls, such person and Harrison does not, directly or
         indirectly, own 5% or more of any class of equity securities, or
         securities convertible into or exercisable or exchangeable for 5% or
         more of any class of equity securities, of such person. As used herein,
         the "Restricted Period" shall mean the period commencing on the date
         hereof and terminating on May 24, 1999.

                  (b) As an independent covenant, Harrison also agrees to
         refrain during the Restricted Period, without written permission from
         the Company, from diverting, taking, soliciting and/or accepting on his
         own behalf or on the behalf of another person, firm, or company, the
         business of any past or present customer of the Company, its divisions,
         subsidiaries and/or other affiliated entities, or any identified
         prospective or potential customer of the Company, its divisions,
         subsidiaries and/or affiliated entities, whose identity became or
         becomes known to Harrison through his employment by the Company.

                  (c) As an independent covenant, Harrison agrees to refrain for
         a period of twelve months after the date of this Agreement from
         inducing or attempting to influence any employee of the Company, its
         divisions, subsidiaries and/or affiliated entities to terminate his
         employment with the Company, its divisions, subsidiaries and/or
         affiliated entities.

         12. COOPERATION. Harrison shall cooperate with the Company to the
extent reasonably required in all matters relating to the transfer of his
pending work on behalf of the Company and its Subsidiaries and the orderly
transfer of any such pending work as designated by the Company. Harrison shall
take such further action and execute documents as may be reasonably necessary or
appropriate in order to carry out the provisions and purposes of this Section.
Harrison shall not be obligated to incur any costs or expenses in connection
with the cooperation required hereby.

         13. NON-ADMISSION OF LIABILITY.

                  (a) The payment of the consideration by the Company and EHL
         above is not to be taken or understood as an admission of liability by
         the Company or any person or entity released herein.

                  (b) Nothing in this Agreement shall be taken or understood as
         an admission of liability by Harrison of any wrongdoing.

         14. INDEMNIFICATION.

                  (a) As a part of the consideration for the payment of the
         above sum, Harrison for himself, his heirs, executors, administrators
         and assigns, releases and agrees to indemnify and hold harmless the
         Company and all persons released above from and against all claims,
         including attorneys' fees and costs of defending any such claims, and
         causes of action of any




                                       5
<PAGE>   6


         nature, without limitation, which may be asserted by any person, firm,
         or entity claiming by, through, or under him for any relief claimed to
         be due him and released by this Agreement.

                  (b) The Company, on behalf of itself and its subsidiaries,
         affiliates, officers, directors, shareholders, agents,
         representatives, successors and assigns, releases and agrees   to
         indemnify and hold harmless Harrison and his heirs, executors,
         administrators and assigns from and against all claims, including
         attorneys' fees and costs of defending any such claims, and causes of
         action of any nature, without limitation, which may be asserted by any
         person, firm, or entity claiming by, through, or under it for any
         relief claimed to be due it and released by this Agreement.

         15. EXPLANATION TO THIRD PARTIES; CONFIDENTIALITY OF AGREEMENT. The
parties hereto agree that they shall describe, as necessary in the conduct of
their business, the termination of the relationship between Harrison and the
Company and its Subsidiaries. The parties agree that, hereafter, any facts,
events, or incidents occurring during Harrison's employment and the terms,
amounts, or other incidents related to this Agreement and any documents, papers,
and writing related to it, as well as the fact of settlement, shall remain
confidential and shall not be disclosed by them to any third parties, except to
professional advisors, accountants, legal counsel, or as is necessary to carry
out any obligations under this Agreement or to enforce its rights under this
Agreement, and as may be required by any federal or state agency or court. In
the event of any disclosure to any authorized person, the parties shall instruct
such individuals of the provisions of this Section. In the event of necessary
disclosure by Harrison to such agency or court (except tax filings), Harrison
shall promptly notify the Company of such necessity, prior to any disclosure.

         16. WAIVER OF REEMPLOYMENT. Harrison further agrees that he will not
apply for employment or reemployment with the Company.

         17. UNDERSTANDING OF WAIVER. Harrison agrees that prior to the
execution of the Agreement, he has had a reasonable period of time within which
to consider this Agreement; and he understands the terms and conditions of this
Agreement and agrees to abide by this document and knowingly and voluntarily
executes it without hidden reservations.

         18. NON-ASSIGNMENT. Harrison affirms that he has not assigned, pledged,
sold, transferred, or otherwise conveyed any right, claim, or interest that he
has or may have in any matters released herein.

         19. TAX RELATED INDEMNIFICATION. In the event any federal, state, or
local taxing authority challenges any tax treatment of any payments described in
this Agreement, Harrison shall give notice to the Company as soon as is
practicable, and provide the Company with a copy of any written indication from
any local, state, or federal agency that the tax consequences of this Agreement
are being challenged. Further, in the event Harrison fails to make adequate
provision for federal income taxes with respect to any amounts due to him
hereunder by the payment of estimated quarterly federal income tax payments,
Harrison shall indemnify and hold harmless the Company for any taxes, penalties
and interest that may be assessed against the Company attributable to amounts
received by Harrison required under law. Notwithstanding anything to the
contrary




                                       6


<PAGE>   7

contained in this Section, however, neither the Company nor Harrison shall be
obligated to defend the tax audit of the other by the Internal Revenue Service
or any other taxing authority.

         20. WAIVER. The failure at any time of either party to this Agreement
to require performance by the other party of any provision of this Agreement
shall in no way affect the right to require full performance at any time
thereafter, nor shall the waiver by either party of a breach of or default under
any provision of this Agreement be taken or held to be or operate as a waiver of
any succeeding breach or default, whether similar to or different from the
breach or default waived, or as a waiver of the provision itself. No provision
of this Agreement, or breach of or default under any provision of this
Agreement, may be waived except in a writing signed by the party charged with
such waiver.

         21. NOTICE. Any and all notices and other communications required or
permitted to be given under this Agreement shall be given in writing and shall
be sent by (i) United States mail, postage prepaid, registered or certified
mail, return receipt requested, or (ii) personal delivery, or (iii) expedited
delivery service with proof of delivery, or (iv) prepaid telegram or fax
(provided that such telegram or fax is confirmed by expedited delivery service
or by mail in the manner previously described), addressed as follows:

         When being sent to EHL:

                  Exploration Holdings Limited
                  1 Suffolk Way
                  SevenOaks
                  Kent TN13 1YL
                  England
                  Facsimile: 011-44-1732-742-746

         When being sent to the Company:

                  Eagle Geophysical, Inc.
                  2603 Augusta, Suite 1400
                  Houston, Texas 77057
                  Facsimile (713) 243-6294

         When being sent to Harrison:

                  Gerald Harrison
                  Gorsey Down Farm
                  Ricketts Hill Road
                  Tatsfield, Kent TN 16 2NB
                  Facsimile: 011-44-1959-571-928

         Change of any such address shall be valid if and when notice of such
change is given to the other party in accordance with this Agreement. Any such
notice or other communication shall be deemed to have been given (i) at the time
of personal delivery in the case of delivery service, (ii) as of the date of
first attempted delivery at the address and in the manner provided herein in the
case of mail, or (iii) upon receipt in the case of telegram or fax.

         22. MERGER. This Agreement supersedes, replaces and merges all previous
agreements and discussions relating to the same or similar subject matters
between Harrison and the Company and, along with the Stock Options and the Stock
Option Plan, constitutes the entire agreement between the parties with respect
to be the subject matter of this Agreement. This

                                       7
<PAGE>   8


Agreement may not be changed or terminated orally, and no change, termination or
waiver of this Agreement or of any of the provisions herein contained shall be
binding unless made in writing and signed by all parties.

         23. NO DEROGATORY COMMENTS. Harrison and the Company shall refrain from
making public or private comments relating to each other which are derogatory or
which may tend to injure Harrison or the Company or the employees, officers,
directors, agents or affiliates, of the Company in its or their business, public
or private affairs, except in connection with legal proceedings in which
Harrison or his successors or assigns are adverse to the Company, its assigns,
successors, agents, trustees, directors, officers, general partners, limited
partners, subsidiaries, affiliates, or employees.

         24. EXPENSES. Each of the parties hereto shall pay the fees and
expenses incurred by it in connection with the negotiation, preparation,
execution and performance of this Agreement, including, without limitation,
attorneys' fees.

         25. APPLICABLE LAW. This Agreement shall be governed by and interpreted
and construed in accordance with the laws of the State of Texas.

         26. RESOLUTION OF CLAIMS AND DISPUTES. Any claim, controversy or
dispute between the parties arising under, out of or relating to this Agreement,
or the breach thereof, shall be determined by a civil action in the District
Court of Harris County, Texas, or other court of competent jurisdiction located
in Harris County, Texas.

         27. BINDING AGREEMENT. This Agreement shall inure to the benefit of and
be binding upon the Company and EHL and their successors and assigns and
Harrison, his heirs, executors, administrators, personal representatives,
successors and assigns. Each of the agreements, covenants, representations,
warranties, consents, acknowledgments, receipts, releases, and waivers by the
parties contained in this Agreement constitutes a material inducement for the
parties to enter into and to perform this Agreement, and both parties would not
enter into this Agreement but for all of such inducements by the other.

         28. CAPTIONS AND HEADINGS. The captions, headings and titles to the
Sections of this Agreement are not a part of this Agreement and shall have no
effect upon the construction or interpretation of any part of this Agreement.

         29. EXECUTION OF THIS AGREEMENT; ORIGINAL COUNTERPARTS. The Company,
EHL and Harrison shall execute and deliver three (3) original counterparts of
this Agreement simultaneously with the execution and delivery of this Agreement.
Each party may 




                                       8
<PAGE>   9

retain one (1) such executed original counterparts. Each such executed
counterpart of this Agreement shall be deemed an original document, and all such
executed counterparts shall together constitute only one (1) and a single
agreement between the parties.

         IN WITNESS HEREOF, the parties hereto have executed this Agreement in
multiple counterparts, effective as of the date above written.





                                            /s/ Gerald M. Harrison
                                            ----------------------------------
                                            GERALD M. HARRISON


                                            EAGLE GEOPHYSICAL, INC.


                                            BY:/s/ Jay N. Silverman
                                               -------------------------------
                                               Jay N. Silverman, President


                                            EXPLORATION HOLDINGS LIMITED


                                            BY:/s/ George Purdie
                                               -------------------------------
                                               George Purdie, Director





                                       9


<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ITEM 1.,
FINANCIAL STATEMENTS, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               MAR-31-1999
<CASH>                                           6,738
<SECURITIES>                                         0
<RECEIVABLES>                                   36,925
<ALLOWANCES>                                         0
<INVENTORY>                                      2,646
<CURRENT-ASSETS>                                54,452
<PP&E>                                         223,885
<DEPRECIATION>                                (37,907)
<TOTAL-ASSETS>                                 281,920
<CURRENT-LIABILITIES>                           67,215
<BONDS>                                        104,918
                                0
                                          0
<COMMON>                                            88
<OTHER-SE>                                      86,287
<TOTAL-LIABILITY-AND-EQUITY>                   281,920
<SALES>                                         28,135
<TOTAL-REVENUES>                                28,135
<CGS>                                           20,808
<TOTAL-COSTS>                                   29,971
<OTHER-EXPENSES>                                   (7)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               2,196
<INCOME-PRETAX>                                (4,025)
<INCOME-TAX>                                     (600)
<INCOME-CONTINUING>                            (3,425)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (3,425)
<EPS-PRIMARY>                                    (.39)
<EPS-DILUTED>                                   (39.0)
        

</TABLE>


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