GENERAL GEOPHYSICS CO
SC 13D, 2000-02-04
OIL & GAS FIELD EXPLORATION SERVICES
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D. C. 20549

                                  SCHEDULE 13D

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                          AMENDMENT NO. ______________*

                        COMPAGNIE GENERALE DE GEOPHYSIQUE
- ------------------------------------------------------------------------------

                                (Name of Issuer)

                   ORDINARY SHARES OF NOMINAL VALUE FF 10 EACH
- ------------------------------------------------------------------------------

                         (Title of Class of Securities)


                                    [NONE]**
      --------------------------------------------------------------------
                                 (CUSIP Number)

                             CHARLES M. NATHAN, ESQ.
                    FRIED, FRANK, HARRIS, SHRIVER & JACOBSON
                               ONE NEW YORK PLAZA
                            NEW YORK, NEW YORK 10004
                                 (212) 859-8000
- ------------------------------------------------------------------------------

                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                DECEMBER 13, 1999
      --------------------------------------------------------------------

             (Date of Event which Requires Filing of this Statement)

If the filing  person has  previously  filed a statement on Schedule 13G to
report the  acquisition  which is the subject of this  Schedule 13D, and is
filing  this  schedule  because of ss. ss.  240.13d-1(e),  240.13d-1(f)  or
240.13d-1(g), check the following box [  ].

NOTE:  Schedules  filed in paper format shall include a signed original and
five copies of the schedule,  including all exhibits.  See ss.240.13d-7 for
other parties to whom copies are to be sent.

*The  remainder  of this cover  page  shall be filled  out for a  reporting
person's  initial  filing on this form with respect to the subject class of
securities,  and for any subsequent amendment containing  information which
would alter disclosures provided in a prior cover page.

The  information  required on the remainder of this cover page shall not be
deemed to be  "filed"  for the  purpose  of  Section  18 of the  Securities
Exchange  Act of 1934 ("Act") or otherwise  subject to the  liabilities  of
that section of the Act but shall be subject to all other provisions of the
Act (however,  see the Notes).

- ------------------------------------
** The CUSIP Number for the American  Depositary Shares,  each representing
one fifth of one Ordinary Share of nominal value FF 10 each, is 204386106.

<PAGE>
                                    13D

CUSIP No. None                          Page 2 of 11 Pages

1   NAME OF REPORTING PERSONS
    I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

    ENERGY FUND II GP, LLC

2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a)  [x]
                                                         (b)  [ ]

3   SEC USE ONLY

4   SOURCE OF FUNDS*

    AF

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
    PURSUANT TO ITEMS 2(d) or 2(e)                           [ ]

6   CITIZENSHIP OR PLACE OF ORGANIZATION

    DELAWARE

  NUMBER OF      7  SOLE VOTING POWER

   SHARES           1,777,071

 BENEFICIALLY    8  SHARED VOTING POWER

OWNED BY EACH

 REPORTING       9  SOLE DISPOSITIVE POWER

PERSON WITH         1,777,071

                10  SHARED DISPOSITIVE POWER



11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,777,071

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)             [ ]
    EXCLUDES CERTAIN SHARES*

13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    19.17%

14  TYPE OF REPORTING PERSON*

    OO


                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
   (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

<PAGE>
                                    13D

CUSIP No. None                          Page 3 of 11 Pages

1   NAME OF REPORTING PERSONS
    I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

    BEACON ENERGY INVESTORS II, LP

2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a)  [x]
                                                         (b)  [ ]

3   SEC USE ONLY

4   SOURCE OF FUNDS*

    AF

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
    PURSUANT TO ITEMS 2(d) or 2(e)                           [ ]

6   CITIZENSHIP OR PLACE OF ORGANIZATION

    DELAWARE

  NUMBER OF      7  SOLE VOTING POWER

   SHARES           1,777,071

 BENEFICIALLY    8  SHARED VOTING POWER

OWNED BY EACH

 REPORTING       9  SOLE DISPOSITIVE POWER

PERSON WITH         1,777,071

                10  SHARED DISPOSITIVE POWER



11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,777,071

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)             [ ]
    EXCLUDES CERTAIN SHARES*

13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    19.17%

14  TYPE OF REPORTING PERSON*

    OO


                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
   (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

<PAGE>
                                    13D

CUSIP No. None                          Page 4 of 11 Pages

1   NAME OF REPORTING PERSONS
    I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

    THE BEACON GROUP ENERGY INVESTMENT FUND II, L.P.

2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a)  [x]
                                                         (b)  [ ]

3   SEC USE ONLY

4   SOURCE OF FUNDS*

    AF

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
    PURSUANT TO ITEMS 2(d) or 2(e)                           [ ]

6   CITIZENSHIP OR PLACE OF ORGANIZATION

    DELAWARE

  NUMBER OF      7  SOLE VOTING POWER

   SHARES           1,748,620

 BENEFICIALLY    8  SHARED VOTING POWER

OWNED BY EACH

 REPORTING       9  SOLE DISPOSITIVE POWER

PERSON WITH          1,748,620

                10  SHARED DISPOSITIVE POWER



11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,748,620

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)             [ ]
    EXCLUDES CERTAIN SHARES*

13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    18.86%

14  TYPE OF REPORTING PERSON*

    PN


                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
   (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

<PAGE>
                                    13D

CUSIP No. None                          Page 5 of 11 Pages

1   NAME OF REPORTING PERSONS
    I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

    CGG INVESTORS LLC

2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a)  [x]
                                                         (b)  [ ]

3   SEC USE ONLY

4   SOURCE OF FUNDS*

    AF

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
    PURSUANT TO ITEMS 2(d) or 2(e)                           [ ]

6   CITIZENSHIP OR PLACE OF ORGANIZATION

    DELAWARE

  NUMBER OF      7  SOLE VOTING POWER

   SHARES           1,748,620

 BENEFICIALLY    8  SHARED VOTING POWER

OWNED BY EACH       0

 REPORTING       9  SOLE DISPOSITIVE POWER

PERSON WITH         1,748,620

                10  SHARED DISPOSITIVE POWER

                    0

11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,748,620

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)             [ ]
    EXCLUDES CERTAIN SHARES*

13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    18.86%

14  TYPE OF REPORTING PERSON*

    OO


                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
   (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE>

                                    13D

CUSIP No. None                          Page 6 of 11 Pages

1   NAME OF REPORTING PERSONS
    I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

    GF LTD. TRANSACTION PARTNERSHIP, L.P.

2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a)  [x]
                                                         (b)  [ ]

3   SEC USE ONLY

4   SOURCE OF FUNDS*

    AF

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
    PURSUANT TO ITEMS 2(d) or 2(e)                           [ ]

6   CITIZENSHIP OR PLACE OF ORGANIZATION

    DELAWARE

  NUMBER OF      7  SOLE VOTING POWER

   SHARES           28,451

 BENEFICIALLY    8  SHARED VOTING POWER

OWNED BY EACH       0

 REPORTING       9  SOLE DISPOSITIVE POWER

PERSON WITH          28,451

                10  SHARED DISPOSITIVE POWER

                    0

11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     28,451

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)             [ ]
    EXCLUDES CERTAIN SHARES*

13  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    .31%

14  TYPE OF REPORTING PERSON*

    PN


                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
   (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

<PAGE>
 ITEM 1.   SECURITY AND ISSUER.

     This Schedule 13D relates to the Ordinary Shares of nominal value FF
10 each (the "Ordinary Shares") of Compagnie Generale de Geophysique, a
company organized under the laws of the Republic of France (the "Issuer").
The principal executive offices of the Issuer are located at 1, rue Leon
Migaux, 91341 Massy, France.

ITEM 2.   IDENTITY AND BACKGROUND.

     This statement is filed by Energy Fund II GP, LLC, Beacon Energy
Investors II, LP, The Beacon Group Energy Investment Fund II, L.P., CGG
Investors LLC and GF Ltd. Transaction Partnership, L.P. (collectively the
"Reporting Persons").

     (a) -- (b)The information required to be filed in response to
paragraphs (a) and (b) of Item 2 with respect to the Reporting Persons is
set forth on Schedule I.

     (c) The information required to be filed in response to paragraph (c)
of Item 2 with respect to the Reporting Persons is as follows:

          1.   Energy Fund II GP, LLC is the general partner of Beacon
               Energy Investors II, LP The principal business of Energy
               Fund II GP, LLC is to serve as general partner of Beacon
               Energy Investors II, LP. The Beacon Group, LLC is the sole
               member of Energy Fund II GP, LLC.

          2.   Beacon Energy Investors II, LP is the general partner of GF
               Ltd. Transaction Partnership, L.P. and the general partner
               of The Beacon Group Energy Investment Fund II, L.P. The
               principal business of Beacon Energy Investors II, LP is to
               serve as general partner of GF Ltd. Transaction Partnership,
               L.P. and general partner of The Beacon Group Energy
               Investment Fund II, L.P.

          3.   The Beacon Group Energy Investment Fund II, L.P. is the
               managing member of CGG Investors LLC and is principally
               engaged in making investments.

          4.   CGG Investors LLC is principally engaged in holding an
               investment interest in the Issuer.

          5.   GF Ltd. Transaction Partnership, L.P. is principally engaged
               in making investments.

     (d) During the last five years, none of the Reporting Persons have
been convicted in a criminal proceeding (excluding traffic violations or
similar misdemeanors).

     (e) During the last five years, none of the Reporting Persons have
been a party to a civil proceeding of a judicial or administrative body of
competent jurisdiction as a result of which any of such person was or is
subject to a judgment, decree or final order enjoining future violations
of, or prohibiting or mandating activities subject to, federal or state
securities laws of finding any violation with respect to such laws.

     (f) The information required to be filed in response to paragraph (f)
of Item 2 with respect to the Reporting Persons is set forth on Schedule I.

ITEM 3.   SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

     The Reporting Persons acquired beneficial ownership of an aggregate of
1,777,071 Ordinary Shares for an aggregate amount of $81,780,000. All the
funds required for the purchases came from capital contributions from the
investors in The Beacon Group Energy Investment Fund II, L.P. and GF Ltd.
Transaction Partnership, L.P.

ITEM 4.   PURPOSE OF THE TRANSACTION.

     The Reporting Persons acquired the Ordinary Shares reported herein
solely for the purpose of investment. The Reporting Persons may make
additional purchases or dispositions of Ordinary Shares either in the open
market or in private transactions depending on the Issuer's business,
prospects and financial condition, the market for the Ordinary Shares,
general economic conditions, money and stock market conditions and other
future developments.

     The Subscription Agreement, dated as of October 23, 1999, between The
Beacon Group Energy Investment Fund II, L.P. and the Company, pursuant to
which The Beacon Group Energy Investment Fund II, L.P. agreed to purchase
from the Company, and the Company agreed to sell to The Beacon Group Energy
Investment Fund II, L.P., the Ordinary Shares, requires the Company to use
its best efforts to cause two individuals that have been previously agreed
upon by The Beacon Group Energy Investment Fund II, L.P. and the Company to
be nominated by the board of directors of the Company for purposes of
election by the shareholders to the Company board of directors. [Such
individuals have been elected to the Company's board of directors.]

     The foregoing description of the Subscription Agreement is not
intended to be complete and is qualified in its entirety by the complete
text of such Subscription Agreement, all of which is incorporated herein by
reference. The Subscription Agreement is filed as Exhibit 1 hereto.

     Except as disclosed in this Item 4, none of the Reporting Persons have
any plans or proposals which relate to or would result in the transactions
listed in paragraphs (a) - (i) of Item 4.

ITEM 5.   INTEREST IN SECURITIES OF THE ISSUER.

     (a) The aggregate number and percentage of the Ordinary Shares
beneficially owned by each of the Reporting Persons are set forth on the
cover pages of this Statement on Schedule 13D, and such information is
incorporated herein by reference.

     (b) The number of Ordinary Shares as to which there is sole power to
vote or to direct the vote, sole power to dispose or to direct the
disposition, or shared power to dispose or direct the disposition for the
Reporting Persons is set forth on the cover pages of this Statement on
Schedule 13D, and such information is incorporated herein by reference.

     (c) There have been no reportable transactions with respect to the
Ordinary Shares within the last 60 days by each of the Reporting Persons
except for the acquisition of beneficial ownership of Ordinary Shares being
reported on this Schedule 13D.

     (d) The investors in The Beacon Group Energy Investment Fund II, L.P.
and GF Ltd. Transaction Partnership, L.P. have the right to receive
dividends from, and the proceeds from the sale of, the respective Ordinary
Shares reported by such persons on the cover pages of this Statement on
Schedule 13D. No such investor has such right with respect to more than 5%
of the Ordinary Shares.

     (e) Not applicable.

ITEM 6.   CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS
          WITH RESPECT TO SECURITIES OF THE ISSUER.

     Concurrently with the purchase of the securities reported hereunder,
the Issuer and The Beacon Group Energy Investment Fund II, L.P. entered
into a Registration Rights Agreement, dated December 13, 1999 (the
"Registration Rights Agreement"). Pursuant to the Registration Rights
Agreement, among other things, the Issuer has granted to The Beacon Group
Energy Investment Fund II, L.P. demand rights to cause the Issuer to
register under the Securities Act of 1933, as amended, the Ordinary Shares
held by The Beacon Group Energy Investment Fund II, L.P. and its
affiliates, and unlimited "piggyback" registration rights (in each case
subject to certain limitations).

     The foregoing description of the Registration Rights Agreement is not
intended to be complete and is qualified in its entirety by the complete
text of such Registration Rights Agreement, all of which is incorporated
herein by reference. The Registration Rights Agreement is filed as Exhibit
2 hereto.

     The Reporting Persons have entered into an Agreement of Joint Filing
(the "Agreement of Joint Filing"), dated as of the date hereof, pursuant to
which the parties thereto have agreed to file jointly this Schedule 13D.

     The foregoing description of the Agreement of Joint Filing is not
intended to be complete and is qualified in its entirety by the complete
text of such Agreement of Joint Filing, all of which is incorporated herein
by reference. The Agreement of Joint Filing is filed as Exhibit 3 hereto.

     Except as disclosed in this Item 6, none of the Reporting Persons,
nor, to the best of their knowledge, any of their directors or executive
officers, are parties to any contract, arrangement, understanding or
relationship (legal or otherwise) with respect to the securities of the
Issuer.
<PAGE>


ITEM 7.   MATERIAL TO BE FILED AS EXHIBITS.


 EXHIBIT
    NO.            DESCRIPTION OF EXHIBIT
 -------           ----------------------

     1    Subscription Agreement, dated as of October 23, 1999 by and
          between Compagnie Generale de Geophysique and The Beacon Group
          Energy Investment Fund II, L.P.

     2    Registration Rights Agreement, dated December 13, 1999 by and
          between Compagnie Generale de Geophysique and The Beacon Group
          Energy Investment Fund II, L.P.

     3    Agreement of Joint Filing

     4    Power of Attorney

<PAGE>

                                 SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete
and correct.


Dated:  February 4, 2000



                    ENERGY FUND II GP, LLC

                    By: /s/ John J. MacWilliams
                       ----------------------------------------
                       Authorized Signatory*


                    BEACON ENERGY INVESTORS II, LP

                    By:   Energy Fund II GP, LLC

                          By: /s/ John J. MacWilliams
                             -------------------------------------
                             Authorized Signatory*


                    THE BEACON GROUP ENERGY INVESTMENT FUND II, L.P.

                    By:     Beacon Energy Investors II, LP
                            By:      Energy Fund II GP, LLC

                                     By: /s/ John J. MacWilliams
                                        ----------------------------
                                        Authorized Signatory*


                    CGG INVESTORS LLC

                    By:     The Beacon Group Energy Investment Fund II, L.P.
                            By:      Beacon Energy Investors II, LP
                                     By:      Energy Fund II GP, LLC

                                              By: /s/ John J. MacWilliams
                                                 ---------------------------
                                                 Authorized Signatory*


                    GF LTD. TRANSACTION PARTNERSHIP, L.P.

                    By:     Beacon Energy Investors II, LP
                            By:      Energy Fund II GP, LLC

                                     By: /s/ John J. MacWilliams
                                        -----------------------------
                                        Authorized Signatory*



- -----------------------
*  A Power of Attorney authorizing John MacWilliams to act on behalf of Energy
   Fund II GP, LLC is filed herewith as Exhibit 4.
<PAGE>

                                      SCHEDULE I

                                    STATE OF
          NAME                      INCORPORATION     BUSINESS ADDRESS
          ----                      -------------     ----------------


     The Beacon Group, LLC          Delaware          399 Park Avenue
                                                      New York, New York 10022

     Beacon Energy Investors        Delaware          399 Park Avenue
     II GP, LLC                                       New York, New York 10022

     Beacon Energy                  Delaware          399 Park Avenue
     Investors II, LP                                 New York, New York 10022

     The Beacon Group Energy        Delaware          399 Park Avenue
     Investment Fund II, L.P.                         New York, New York 10022

     CGG Investors LLC              Delaware          1717 South Boulder Avenue
                                                      Tulsa, Oklahoma 74119

     GF Ltd. Transaction            Delaware          1717 South Boulder Avenue
     Partnership, L.P.                                Tulsa, Oklahoma 74119
<PAGE>
                             INDEX TO EXHIBITS

 EXHIBIT
    NO.            DESCRIPTION OF EXHIBIT
 -------           ----------------------

     1    Subscription Agreement, dated as of October 23, 1999 by and
          between Compagnie Generale de Geophysique and The Beacon Group
          Energy Investment Fund II, L.P.

     2    Registration Rights Agreement, dated December 13, 1999 by and
          between Compagnie Generale de Geophysique and The Beacon Group
          Energy Investment Fund II, L.P.

     3    Agreement of Joint Filing

     4    Power of Attorney


                                 EXHIBIT 1

                          SUBSCRIPTION AGREEMENT



THIS  SUBSCRIPTION  AGREEMENT (this  "Agreement") is made as of October 23,
1999, by and between  Compagnie  Generale de Geophysique,  a French societe
anonyme (the  "Company"),  and The Beacon Group Energy  Investment Fund II,
L.P., a Delaware limited partnership (the "Purchaser").


                                WITNESSETH:


WHEREAS,  the Company  wishes to sell to the  Purchaser  and the  Purchaser
wishes to purchase  from the Company  newly issued  ordinary  shares of the
Company upon the terms and conditions set forth herein.



ACCORDINGLY, the parties hereto hereby agree as follows:


                                 ARTICLE 1
                                 ---------

                      SUBSCRIPTION FOR ORDINARY SHARES

1.1  Issuance and Sale of Shares
     ---------------------------

Subject to the terms and conditions set forth herein, the Company agrees to
issue to the  Purchaser  on the  Closing  Date (as  hereinafter  defined) a
number of its ordinary  shares,  par value FRF 10 per share (the "Shares"),
determined by  multiplying  (x) the amount  (rounded to the fourth  decimal
point)  determined by dividing the euro  equivalent of USD 87,000,000  (the
"Initial Subscription Amount") calculated at the noon buying rate as quoted
by the Federal  Reserve Bank of New York on the  Business  Day  immediately
preceding  the Closing Date by the  arithmetic  average of the Market Price
per share of the Company's  ordinary  shares on each of the 20 Trading Days
immediately  prior to the  date  hereof  by (y) the  amount  determined  by
dividing  (i) the sum of the  arithmetic  average of the  Market  Price per
share  of  the  Company's   ordinary  shares,   ex-droit   preferentiel  de
souscription  ("DPS"),  and the arithmetic  average of the Market Price per
DPS of the  Company's  DPSs,  in each  case on  each  of the  Trading  Days
included within the subscription period for the Rights Offering (as defined
in Article 5.4) during which the ordinary shares,  ex-DPS, and the DPSs are
simultaneously  listed (the  "Subscription  Period") by (ii) the arithmetic
average of the Market  Price per share of the  Company's  ordinary  shares,
ex-DPS,  on each of the  Trading  Days  included  within  the  Subscription
Period,  rounded up to the nearest whole share. The subscription  price per
Share  including  the  issuance  premium  (prime  d'emission)  thereof (the
"Subscription   Price")   shall  be  determined  by  dividing  the  Initial
Subscription  Amount by the  number  of Shares to be issued by the  Company
pursuant to the previous  sentence,  rounded to the nearest euro cent.  For
purposes of this Article 1.1, "Market Price" means the closing price (cours
de cloture) of the Company's  ordinary  shares or droits  preferentiels  de
souscription  ("DPSs"),  as  applicable,  on the Trading Day  concerned  as
published  by   ParisBourseSBF   S.A.  (the  "Paris  Bourse")  in  La  Cote
Officielle, and "Trading Day" means a day on which the Paris Bourse is open
for the general trading of securities.

     Issuance and Sale of Additional Shares
     --------------------------------------

Subject to the terms and conditions set forth herein,  at the option of the
Purchaser as notified to the Company in writing at least two Business  Days
prior to the Closing  Date,  the Purchaser may purchase on the Closing Date
up to an additional number of the Company's  ordinary shares, par value FRF
10 per share, determined by dividing the difference,  if positive,  between
90,000,000  euros  and the gross  proceeds  before  underwriters'  fees and
commissions received by the Company pursuant to the Rights Offering,  up to
a maximum of 15,000,000 euros (the "Additional  Subscription  Amount"),  by
the Subscription  Price (the "Additional  Shares").  The notice provided by
the  Purchaser to the Company  pursuant to this Article 1.2 shall set forth
the  number of  Additional  Shares the  Purchaser  shall so  purchase.  The
definition of "Shares" shall include the Additional Shares for all purposes
of this Agreement,  other than Article 1.1 hereof; it being understood that
the total  number of Shares  issued  pursuant to Sections 1.1 and 1.2 shall
not exceed 1,875,000.

1.3  Closing Date
     ------------

The closing of the  subscription  for the Shares (the "Closing") shall take
place at 10:00 a.m.  Paris time on the Business Day  following  the date on
which the last condition  precedent set forth in Articles 4.1 and 4.2 shall
have been  satisfied  or waived,  at the offices of Fried,  Frank,  Harris,
Shriver & Jacobson,  7 rue Royale,  75008 Paris,  France,  or at such other
time and place as the parties  hereto  shall agree in writing.  The date of
the Closing is hereinafter referred to as the "Closing Date".

1.4  Closing Deliveries
     ------------------

On the Closing  Date,  the  Purchaser  shall  execute a  subscription  form
(bulletin  de  souscription)  in the form  attached as Exhibit A hereto and
shall pay by way of wire transfer to the account of the Company notified to
the Purchaser in writing at least three  Business Days prior to the Closing
(the "Company Bank Account") at the bank, acting as depositary with respect
to the issuance of the Shares (the "Bank"),  the subscription price for the
Shares. Upon evidence of such wire transfer and issuance by the Bank of the
corresponding  "certificat  du  depositaire  des fonds",  the Company  will
register the Shares in book-entry form in the name of the Purchaser or will
cause Banque Neuflize,  Schlumberger,  Mallet to register the Shares in the
name of the Purchaser in order to comply with the registration  formalities
required to obtain double voting rights pursuant to the Company's  statuts.
The Shares  issued to the  Purchaser  hereunder  will, at the time of their
issuance, be registered for trading on the Paris Bourse.  Accordingly,  the
Company shall comply with applicable regulations,  including Regulation No.
98-01 of the French  Commission des  Operations de Bourse (the "COB"),  and
the  rules  and   instructions  of  the  Paris  Bourse,   related  to  such
registration.  On the Closing Date,  each of the parties  hereto shall duly
execute and deliver a  registration  rights  agreement  (the  "Registration
Rights Agreement") substantially in the form of Exhibit B hereto.

1.5  Allocation of the Shares
     ------------------------

The  Company  and the  Purchaser  agree  that the  Purchaser  may cause the
following  entities (the "Purchaser  Entities"),  of which the Purchaser is
the general partner or managing  member,  to subscribe for and purchase the
Shares on the Closing  Date in the place of the  Purchaser.  The  Purchaser
anticipates that the Purchaser Entities will subscribe for and purchase the
Shares in the percentages indicated below:

GF Ltd. Transaction Partnership, L.P.       1.59%
CDPQ Transaction Partnership, L.P.         10.59%
CGG Investors, LLC                         87.82%.

The Purchaser may change such  allocation by written  notice to the Company
at least two Business Days prior to the Closing Date.  Upon the purchase by
any Purchaser  Entity of Shares,  such  Purchase  Entity shall have all the
rights and obligations with respect thereto as the Purchaser hereunder. The
Purchaser shall remain liable,  subject to the terms and conditions of this
Agreement,  to purchase any Shares not purchased by the Purchaser  Entities
pursuant to this Article 1.5.


                                 ARTICLE 2
                                 ---------

               REPRESENTATIONS AND WARRANTIES OF THE COMPANY

The Company hereby  represents and warrants to the Purchaser as of the date
hereof and as of the Closing Date as follows:

that the Company and the subsidiaries of the Company,  of which the Company
holds  directly or  indirectly,  more than 51% of the voting  rights and/or
share  capital or which are under the common  control  of the  Company  and
another  Person  (individually  a  "Subsidiary",   and  collectively,   the
"Subsidiaries"),  are duly organized and validly existing under the laws of
their  jurisdictions  of  incorporation  and are in good  standing  (to the
extent such concept  exists) under such laws, and conduct their  activities
in compliance  with all laws applicable to them; that they have all rights,
power and  authority to own their assets and conduct  their  activities  as
described in the Information Documents (as defined below); that the members
of their boards of directors (or equivalent  governing  bodies),  and their
presidents or managers,  as the case may be, have been regularly  appointed
and carry out their respective  functions in compliance with all applicable
laws;

that it has all rights,  powers and authority to enter into this  Agreement
and the  Registration  Rights  Agreement and,  subject to the  Shareholders
Meeting  Approval  and the  Acknowledgment  (each  as  defined  below),  to
consummate the transactions contemplated hereby and thereby. As of the date
hereof, all corporate actions on the part of the Company, its directors and
shareholders  necessary  for the  authorization,  execution,  delivery  and
performance of this Agreement and the Registration  Rights Agreement by the
Company,  the  authorization,  issuance  and delivery of the Shares and the
performance of the Company's obligations hereunder and thereunder have been
taken other than (i) the  authorization  to increase  the  Company's  share
capital  and  to  waive  the   shareholders'   preemptive   rights  (droits
preferentiels  de  souscription) in favor of the Purchaser and consequently
to issue the Shares,  which  authorization and waiver must be granted at an
extraordinary   general   meeting  of  the  Company's   shareholders   (the
"Shareholders  Meeting  Approval");  (ii) the  acknowledgment  of the final
subscription  price for the Shares by the Company's board of directors (the
"Acknowledgment")  and (iii) receipt of the Antitrust Approvals (as defined
in  clause  (d)  below).  Following  receipt  of the  Shareholders  Meeting
Approval, the Acknowledgment and the "certificat du depositaire des fonds",
the Shares  will be validly  issued and fully paid and the  Purchaser  will
have  valid and  negotiable  title  thereto  free and  clear of any  liens,
encumbrances  or  defects  other than any  liens,  encumbrances  or defects
created by the Purchaser. Upon receipt of the Shareholders Meeting Approval
and the  Acknowledgment,  the issuance of the Shares to the Purchaser  will
not  violate  or give  rise to any  preemptive  rights  or  rights of first
refusal on behalf of any Person;

that this Agreement has been duly executed and delivered by the Company and
constitutes  a  legal,   valid  and  binding  obligation  of  the  Company,
enforceable  in  accordance  with its  terms.  Upon its due  execution  and
delivery by the Company in  accordance  with Article 1.4, the  Registration
Rights Agreement will constitute a legal,  valid and binding  obligation of
the Company, enforceable in accordance with its terms;

(d) that no consent,  approval,  authorization or order of, or designation,
declaration or filing with, any governmental authority or court is required
for the valid  execution and delivery by the Company of this  Agreement and
the  Registration  Rights  Agreement,  the  issuance of the Shares,  or the
consummation  of any other  transactions  contemplated  hereby  or  thereby
except  (i) where the  failure  to obtain  any such  consent,  approval  or
authorization  or to make such  filing  would not have a  Material  Adverse
Effect (as  defined in clause (f) below) and (ii) for any  notification  or
filing requirement under the Hart-Scott-Rodino Antitrust Improvement Act of
1976, as amended, and any filing with the European Commission or any member
of the European Union (collectively, the "Antitrust Approvals");

(e) that there are no legal,  administrative or arbitration  proceedings or
any  claims  pending  against  it or  any of the  Subsidiaries  or,  to its
knowledge,   any  threat  of  any  legal,   administrative  or  arbitration
proceedings or claims which could result in a substantial  deterioration in
its financial condition or in that of its Subsidiaries taken as a whole, or
which could affect the  performance by the Company of this Agreement or the
issuance of the  Shares;  that the  outstanding  legal,  administrative  or
arbitration  proceedings to which the Company or any of the Subsidiaries is
a party or which  might  affect  their  assets  or  property  which are not
disclosed in the Information  Documents,  including disputes arising in the
normal  course of  business,  are not likely,  taken as a whole,  to have a
Material Adverse Effect as defined in clause (f) below;

(f) that the  consolidated  financial  statements  of the  Company  and its
Subsidiaries   included  in  the  Information   Documents   faithfully  and
accurately present and give a true and fair view of the financial condition
of the Company and its  consolidated  Subsidiaries  and of their  operating
results as at the dates and for the periods indicated therein and that they
were prepared in  conformity  with French law and U.S.  generally  accepted
accounting  principles;  that the  information  contained  in the  sections
entitled  "Summary  Financial   Information"  and  "Selected   Consolidated
Financial  Information"  in the  U.S.  Prospectus  (as  defined  below)  is
presented  therein  in a fair and  sincere  manner  and was  prepared  on a
compatible basis with the preparation of the financial  statements included
in the Registration  Statement and the U.S.  Prospectus (as defined below);
and that  since 30 June 1999,  with the  exception  of any matter  which is
specifically  disclosed  in the  Information  Documents,  (1)  no  material
adverse change has occurred, nor has any circumstance occurred which has or
might have a material  adverse  effect on the legal,  financial or economic
position,  operating  results,  business or the financial  condition of the
Company and its Subsidiaries taken together as a whole (a "Material Adverse
Effect");  and (2)  neither the  Company  nor any of its  Subsidiaries  has
conducted any transactions outside of the ordinary course of business which
individually  or in the aggregate  would be exceptional  for the Company or
its Subsidiaries taken as a whole by reason of their size or nature;

(g) that  each of the  Information  Documents  is or will be at the date on
which it is prepared,  true and  accurate,  and contains or will contain on
such date,  all  important  information  relevant  to the  Company  and its
Subsidiaries; that all such information is or will be true and accurate and
does  not or will not at such  date  omit any fact  that  might  alter  the
significance of such  information and that all of the estimates,  forecasts
and  statements  of intent  contained in the  Information  Documents  were,
remain and will be at such date, true and accurate and that the Company has
carried  out  all  investigations   necessary  to  verify  the  information
contained in the Information Documents;

(h) that the Company and the  Subsidiaries are in compliance with the terms
of their  by-laws  (statuts) or  equivalent  governing  documents  and that
neither  the  Company  nor any of its  Subsidiaries  is in  default  of any
contractual obligation,  which default might have a Material Adverse Effect
or unfavorably  affect in a significant  way the capacity of the Company to
perform its obligations under this Agreement or issue the Shares;

(i) that all of the shares comprising the share capital of the Company have
been  validly  issued and  subscribed  for and are fully  paid,  completely
unencumbered  and freely  negotiable and there is no statutory  restriction
affecting their transfer,  other than 28,970 ordinary shares of the Company
that  were not  fully  paid as of  October  15,  1999 and  which  have been
subscribed for by employees of the Company and the Subsidiaries pursuant to
the Company's  employee savings plan instituted in 1997; that the shares of
the  Company  are listed for  trading  on the  Premier  Marche of the Paris
Bourse and the shares of the Company  represented  by  American  Depositary
Shares are listed and traded in that form on the NYSE and that the  Company
will take all necessary steps to maintain those listings;  that the listing
of the Shares for  trading on the Premier  Marche of Paris  Bourse has been
requested  and will take  effect as soon as  possible  after the Shares are
issued in accordance with this Agreement;

(j) that all of the shares  comprising the share capital of the Company are
identical in all material respects and conform to the descriptions  thereof
set forth in the Information Documents;

(k) that all presently exercisable options to acquire shares of the Company
can result in the issuance of a maximum of 28,970 shares;

(l) that all other securities  representing the capital of the Subsidiaries
have  been  validly  issued  and  subscribed  to and  are  fully  paid  and
completely  unencumbered,  subject to any matter  which is disclosed in the
Information Documents; that the shares of the Subsidiaries held directly or
indirectly  by the  Company  are free from any  pledge,  security  or other
charge or third party right;

(m) that the  issuance  of the  Shares is and will  continue  to be validly
authorized on the Closing Date,  and that the Shares upon their issuance to
the  Purchaser  in  accordance  with the  terms of this  Agreement  will be
validly issued and subscribed to, fully paid,  completely  unencumbered and
freely  negotiable  and there will be no  statutory  restriction  affecting
their  transfer and that no security,  preference or other  charge,  or any
third party right will exist over the Shares;  that neither the issuance of
the  Shares nor the  execution  or  performance  of this  Agreement  by the
Company will  contravene  any legal or regulatory  provision or the by-laws
(statuts) of the Company or of any of the  Subsidiaries  or any undertaking
made by the Company or any of the Subsidiaries,  nor will they constitute a
breach of any  contractual  obligation  to which the  Company or any of the
Subsidiaries  is a party or an event of default  permitting  a creditor  to
demand early payment of any  contractual  debt or guarantee  granted by the
Company or any of the Subsidiaries;

(n) that the  Company  is not  aware of any  information,  other  than that
contained in the Information Documents,  which might have a significant and
lasting  effect on the value or price of its listed shares or the shares of
any of its listed Subsidiaries;

(o) that from  January  1, 1999 to the  signature  of this  Agreement,  the
Company has not traded  directly or  indirectly  in its shares on any stock
exchange;

(p) that the signature of this  Agreement and the completion of the capital
increase  in  connection  with the Shares  contemplated  herein do not give
rise,  pursuant to laws currently in force,  to liability in France for any
direct or indirect  taxes  (other than fixed  registration  taxes and stamp
taxes,  the  non-payment  of which  shall not affect the  validity  of this
Agreement, or the Shares), duties or imposts of any kind;

(q) that there are no labor  disputes  pending  with the  employees  of the
Company or of any of its Subsidiaries, and to the knowledge of the Company,
no such  dispute is  foreseeable;  that the the Company is not aware of any
pending or imminent  labor  disputes  concerning  the employees of its main
suppliers,  clients  or  subcontractors,  or  the  employees  of any of its
Subsidiaries, which may have a Material Adverse Effect;

(r) that the Company and each of its Subsidiaries  possess,  both in France
and abroad, all permits, approvals and other authorizations necessary for
the conduct of their businesses (the "Permits"); that, except to the extent
that the violation,  expiration,  withdrawal or modification of the Permits
is not likely to have a Material  Adverse  Effect (1) the businesses of the
Company and the  Subsidiaries are conducted in compliance with the Permits,
(2) the Permits are in full force and effect,  and (3) no proceeding of any
kind has been  instituted  which may lead to the withdrawal or modification
of the Permits;

(s) that the Company and the Subsidiaries own or have an exclusive right to
use  all of the  patents,  trademarks,  trade  names  or  other  industrial
property rights  (including know how) or intellectual  property rights used
in or necessary for the conduct of their businesses (the  "Intellectual and
Industrial  Property  Rights");  that  neither  the  Company nor any of the
Subsidiaries is aware that the Intellectual and Industrial  Property Rights
infringe or violate intellectual or industrial property rights belonging to
any third  party,  or of facts or  circumstances  likely to  challenge  the
validity  of such rights or their  enforceability  against  third  parties,
except to the extent that such actions or challenges are not likely to have
a Material Adverse Effect;

(t) that, except as set forth in the Information  Documents,  and except to
the extent that such  non-compliance  or such proceedings are not likely to
have  a  Material  Adverse  Effect,   (A)  the  Company  and  each  of  the
Subsidiaries   are  in   compliance   with  all   laws,   regulations   and
administrative,  judicial or other  decisions  applicable to them regarding
pollution,  the  protection  of  health  and the  environment,  or toxic or
dangerous  substances or waste (together,  "Environmental  Laws");  (B) all
approvals,  permits,  consents and authorizations necessary for the conduct
of the businesses of the Company and each of the Subsidiaries in compliance
with  Environmental  Laws  have  been  obtained  and are in full  force and
effect,  and the businesses of the Company and each of the Subsidiaries are
performed  in  conformity  with  such  consents,   permits,  approvals  and
authorizations;  (C)  no  administrative,  judicial  or  other  proceeding,
inquiry or  complaint  of any kind  regarding  an alleged  violation of any
Environmental  Laws has been instituted or filed against the Company or any
of  the  Subsidiaries,  and to  the  knowledge  of  the  Company,  no  such
proceeding is threatened;

(u)  that,  except as may be set forth in the  Information  Documents,  the
Company  and its  Subsidiaries  have  regular and valid title to their real
property, which is not subject to any mortgage, security, easement or other
third party right which may, individually or collectively, affect the value
or use  thereof;  that the lease and  sublease  agreements  under which the
Company  or any  of the  Subsidiaries  are  the  lessee  of  real  property
described in the Information Documents are in full force and effect, and no
claim has been asserted by any third party which  challenges  the rights of
the Company or any of the Subsidiaries  under such leases or subleases,  or
the use of such real property;

(v) that the Company has conducted a study  evaluating its activities,  and
those of the  Subsidiaries  and their suppliers or services  providers with
which the Company or any of the Subsidiaries  has a material  relationship,
and of the products  manufactured or sold by Sercel,  in order to assess to
what extent the activities of the Company or of any of the Subsidiaries, or
the  products  manufactured  or sold by Sercel are likely to be affected by
the  transition to the year 2000;  that  following  the  completion of this
evaluation,  the Company has no reason to  believe,  and does not  believe,
that the  transition to the year 2000 is likely to have a Material  Adverse
Effect or to result in material inadequacies or disruptions in the business
or operations of the Company;

(w) that the information set forth in the Information  Documents which sets
forth certain  provisions of laws applicable to the Company,  the Company's
by-laws, the litigation or administrative proceedings involving the Company
and the contracts or any other document related to the Company,  is correct
in all material respects; and

(x) that it is not a "controlled foreign corporation" within the meaning of
section 957 of the United States Internal  Revenue Code of 1986, as amended
(the "Code") or a "passive foreign  investment  company" within the meaning
of section 1297 of the Code.

For  purposes of this  Agreement,  "Information  Documents"  shall mean the
"Documents  d'Information" as such term is defined in the Contrat Global de
Garantie to be entered into among the Company and the Garants named therein
pursuant to the Rights  Offering  or the  equivalent  term used  therein to
define the filings and other  documents  related  thereto to be made in the
United  States and France in  connection  with the Rights  Offering and the
prospectus  filed with the COB in accordance  with COB Regulation No. 98-01
with respect to the issuance of the Shares,  and  "Registration  Statement"
and  "U.S.  Prospectus"  shall  have the  meanings  assigned  to the  terms
"registration  statement"  and  "Prospectus  U.S.",  respectively,  in  the
Contrat Global de Garantie or the  equivalent  terms used therein to define
the filings and documents  related  thereto to be made in the United States
in connection with the Rights Offering.


                                 ARTICLE 3
                                 ---------

              REPRESENTATIONS AND WARRANTIES OF THE PURCHASER

The Purchaser hereby represents and warrants to the Company as follows:

3.1  Restricted Shares
     -----------------

The Purchaser  understands  that the Shares have not been registered  under
the U.S.  Securities  and Exchange Act of 1934,  as amended (the  "Exchange
Act") or any  United  States  state  securities  laws,  by  reason of their
issuance  by the  Company in a  transaction  exempt  from the  registration
requirements  thereof,  and may  not be sold  unless  such  disposition  is
registered  under the  Securities  Act and  applicable  United States state
securities laws or is exempt from registration thereunder.

3.2  Organization
     ------------

The Purchaser is duly organized and validly  existing under the laws of the
jurisdiction of its organization,  with all rights,  power and authority to
enter into and perform this Agreement.

3.3  Authority
     ---------

The  execution  and  delivery of this  Agreement by the  Purchaser  and the
consummation by the Purchaser of the transactions  contemplated hereby have
been duly  authorized by all necessary  action on behalf of the  Purchaser.
This  Agreement  has been duly  executed and delivered by the Purchaser and
constitutes a valid and binding obligation of the Purchaser, enforceable in
accordance with its terms,  subject to laws of general application relating
to  bankruptcy,  insolvency  and the  relief  of  debtors  and rules of law
governing  specific  performance,  injunctive  relief  or  other  equitable
remedies.

3.4  No Conflict
     -----------

The execution and delivery of this Agreement by the Purchaser does not, and
the  consummation  of the  transactions  contemplated  hereby  will not (a)
violate any provision of law, statute,  rule or regulation,  or any ruling,
writ,  injunction,  order, judgment or decree of any court,  administrative
agency  or  other  governmental  body  applicable  to  it,  or  any  of its
properties or assets or (b) violate its organizational documents.

3.5  Governmental Consents
     ---------------------

No consent,  approval or  authorization  of or designation,  declaration or
filing with any  governmental  authority  on the part of the  Purchaser  is
required  in  connection  with the valid  execution  and  delivery  of this
Agreement or the consummation of any other transaction contemplated hereby,
other than the Antitrust Approvals.


                                 ARTICLE 4
                                 ---------

                      CONDITIONS PRECEDENT TO CLOSING

4.1  Conditions Precedent for the Benefit of the Purchaser
     -----------------------------------------------------

Notwithstanding  any  other  provision  contained  in this  Agreement,  the
obligations of the Purchaser to subscribe for the Shares and consummate any
other transactions to be performed by it in connection with the Closing are
expressly  conditioned upon, and subject to, the fulfillment on or prior to
the Closing Date of each of the  conditions  set forth in this Article 4.1.
The  conditions  set forth in this Article 4.1 are  stipulated for the sole
benefit of the  Purchaser  and the  Purchaser  may waive any or all of such
conditions in its sole discretion in writing at or prior to the Closing.

(a) Each of the  representations  and  warranties  made by the  Company  in
Article 2 hereof  shall be true and correct in all material  respects  when
made and shall be true and correct in all material  respects on the Closing
Date with the same  force and  effect as if they had been made on and as of
such date.

(b) The Company shall have performed all  obligations and complied with all
covenants and agreements to be performed or complied with by it on or prior
to the Closing Date.

(c) The Company shall have  consummated  the Rights Offering and shall have
received gross proceeds before  underwriters' fees and commission therefrom
of at least 75,000,000 euros.

(d) The  Purchaser  shall have received  from Jones,  Day,  Reavis & Pogue,
counsel to the Company, an opinion addressed to it, dated the Closing Date,
in the form of Exhibit C hereto.

(e) The entry by the Company  into the Expense  Reimbursement  Agreement in
the form  attached as Exhibit D hereto  shall have been  authorized  by the
Company's  board of directors for purposes of Article 101 of French law No.
66-537  of July 24,  1966 and the  Company  shall  have duly  executed  and
delivered to the Purchaser a copy thereof.

(f) The Company  shall have  completed  all actions  necessary to cause the
Shares to be listed for trading on the Paris  Bourse  other than  providing
the Paris Bourse and SICOVAM S.A.  with a notice of the number of Shares to
be issued to the  Purchaser  hereunder and listed for trading and copies of
the  Acknowledgment and the certificat de depositaire du fonds with respect
to the Shares (the "Final Listing Formalities").

(g) There shall not be in effect any order  enjoining  or  restraining  the
transactions  contemplated  by this  Agreement and no  proceeding  shall be
pending  before any  Authority  to restrain or  prohibit  the  transactions
contemplated  by this  Agreement  and there shall not be in effect any law,
rule or regulation  prohibiting or  restricting  the  subscription  for the
Shares or requiring any consent or approval of any Person,  which shall not
have been obtained, to issue, purchase or deliver the Shares.

(h) The Company shall have delivered to the Purchaser a certificate,  dated
the Closing Date and duly executed by an authorized officer of the Company,
certifying that each of the conditions specified in Articles 4.1(a) through
4.1(c) has been satisfied.

(i) The  Shareholders  Meeting  Approval  shall have been obtained from the
Company's shareholders and the Acknowledgment shall have been obtained from
the Company's board of directors pursuant to the statuts of the Company and
in  accordance  with French law, and the  Purchaser  shall have  received a
certified copy of each of the following  documents:  (1) the minutes of the
meeting of the Company's  board of directors which decided to submit to the
Company's  shareholders  the proposed  capital increase with respect to the
Shares  and call an  extraordinary  meeting  of the  shareholders,  (2) the
report of the  Company's  board of directors to the  shareholders,  (3) the
report of the statutory  auditors to the  shareholders,  (4) the minutes of
the extraordinary  meeting of the shareholders  containing the Shareholders
Meeting Approval, and (5) the minutes of the meeting of the Company's board
of  directors  held to  acknowledge  the final  subscription  price for the
Shares in euros.

(j) The Target  Tender Offer (as defined in Section 5.3) shall have expired
and at least 80% of the  outstanding  shares of capital stock of GeoScience
Corporation "GeoScience", shall have been validly tendered pursuant thereto
and all other  conditions to the  Company's  and the Offering  Entity's (as
defined below) obligations to purchase all such shares set forth in Annex A
to the Agreement  and Plan of Merger,  dated as of October 23, 1999, by and
among  GeoScience,  the Company,  and Sercel  Acquisition  Corp.,  a Nevada
corporation  (the "Offering  Entity") and a wholly owned  subsidiary of the
Company (the "Merger Agreement") shall have been satisfied or waived, other
than the condition listed in paragraph (K) of such Annex A.

(k) The Company  shall have paid to the  Purchaser  or an  Affiliate of the
Purchaser  6% of  the  sum of  the  Initial  Subscription  Amount  and  the
Additional  Subscription  Amount, if any, pursuant to a financial  advisory
fee  agreement  (the  "Engagement  Letter") to be executed by such  parties
prior to or at the Closing.

(l)  The  Beacon   Nominees   shall  have  been  elected  at  the  Ordinary
Shareholders' Meeting (as defined in Article 5.2) to the Company's board of
directors,  each with a term of office expiring on the date of the ordinary
general  shareholders' meeting of the Company held to approve the Company's
financial  statements for the 2004 fiscal year subject to the completion of
the  subscription  for the Shares  contemplated  herein,  and the Purchaser
shall have received a  certificate  or other  written  evidence  reasonably
satisfactory  to the Purchaser and its counsel from the Company's  insurers
indicating  that the  Beacon  Nominees  are  covered  by D+O  insurance  in
accordance with Article 5.15.

(m) The  Company  shall  not have  amended  or waived or agreed to amend or
waive any of the  material  terms  and  conditions  of its USD  130,000,000
multicurrency syndicated credit facility or its FRF 100,000,000 bridge loan
facility,  including  any events of default  with respect  thereto,  in any
manner adverse to the Company,  and completion of the Rights Offering shall
have  rendered the event of default set forth in the  Company's  syndicated
credit  facility  regarding  a failure  by the  Company  to  complete a FRF
300,000,000 capital increase incapable of occurring.

4.2  Conditions Precedent for the Benefit of the Company
     ---------------------------------------------------

Notwithstanding  any  other  provision  contained  in this  Agreement,  the
Company's  obligations  to  issue  the  Shares  and  consummate  any  other
transactions  to be  performed  by it in  connection  with the  Closing are
expressly  conditioned upon, and subject to, the fulfillment on or prior to
the Closing Date of each of the  conditions  set forth in this Article 4.2.
The  conditions  set forth in this Article 4.2 are  stipulated for the sole
benefit  of the  Company  and  the  Company  may  waive  any or all of such
conditions in its sole discretion in writing at or prior to the Closing.

(a) The  representations  and warranties made by the Purchaser in Article 3
hereof  shall be true and correct in all respects  when made,  and shall be
true and correct in all  respects  on the Closing  Date with the same force
and effect as if they had been made on and as of such date.

(b) The Purchaser  shall have performed all  obligations  and complied with
all covenants  and  agreements to be performed or complied with by it on or
before the Closing Date.

(c) The Company shall have received from Fried,  Frank,  Harris,  Shriver &
Jacobson,  counsel to the  Purchaser,  an opinion dated the Closing Date in
the form of Exhibit E hereto.

(d) There shall not be in effect any order  enjoining or  restraining,  and
there shall be no  proceeding  pending  before any Authority to restrain or
prohibit,  the transactions  contemplated by this Agreement and there shall
not be in effect any law, rule or regulation prohibiting or restricting the
subscription  for the Shares or  requiring  any  consent or approval of any
Person which shall not have been obtained to issue, purchase or deliver the
Shares.

(e) The  Purchaser  shall  have  delivered  to the  Company a  certificate,
executed on behalf of the Purchaser by an officer of the  Purchaser,  dated
the Closing Date,  and  certifying  to the  fulfillment  of the  conditions
specified in Articles 4.2(a) and 4.2(b) of this Agreement.

(f) The  Shareholders  Meeting  Approval  shall have been obtained from the
Company's  shareholders at a meeting of the Company's shareholders pursuant
to the  statuts of the  Company and in  accordance  with  French  law.  The
Acknowledgment  shall  have  been  obtained  from  the  Company's  board of
directors  pursuant to the statuts of the  Company and in  accordance  with
French law.

(g) The Target  Tender  Offer  shall have  expired  and at least 80% of the
outstanding  shares of capital stock of GeoScience  shall have been validly
tendered  pursuant  thereto  and  all  other  conditions  to the  Company's
obligation  to  purchase  such  shares  set forth in Annex A to the  Merger
Agreement shall have been waived or satisfied.


                                 ARTICLE 5
                                 ---------

                          COVENANTS OF THE PARTIES


5.1  Shareholder Meeting Approval
     ----------------------------

Promptly following execution of this Agreement,  the Company shall take all
steps necessary to hold an extraordinary general shareholders' meeting (the
"Extraordinary Shareholders' Meeting") as promptly as practicable and in no
event later than December 15, 1999 for the purposes of taking all requisite
actions in order to permit the  consummation of the subscription for Shares
contained herein, including authorizing the increase of the Company's share
capital,   obtaining   the  waiver  of  the   preemptive   rights   (droits
preferentiels  de  souscription) of the shareholders for the benefit of the
Purchaser and the Purchaser  Entities,  and  consequently  authorizing  the
Company's  board of  directors to issue the Shares on behalf of the Company
and to hold a meeting of the  Company's  board of directors for the purpose
of acknowledging the final  subscription price in euros of the Shares to be
subscribed for by the Purchaser.

5.2  Beacon Nominees
     ---------------

Promptly following the execution of this Agreement,  the Company shall take
all steps necessary to hold an ordinary general  shareholders' meeting (the
"Ordinary  Shareholders'  Meeting"),  on the same  date as and  immediately
following  the  Extraordinary  Shareholders'  Meeting,  for the  purpose of
electing two additional members to the Company's board of directors subject
to the completion of the subscription for the Shares  contemplated  hereby.
The Company  shall use its best efforts to cause the two  individuals  that
have been previously agreed upon by the parties (the "Beacon  Nominees") to
be  nominated  by the board of directors of the Company for the purposes of
such election.  The minutes of the Extraordinary  Shareholders' Meeting and
the Ordinary Shareholders' Meeting shall be in a form reasonably acceptable
to the Purchaser and its counsel.

5.3  Target Tender Offer
     -------------------

Within 5 Business  Days  following  the public  announcement  thereof,  the
Company, through the Offering Entity, shall commence, within the meaning of
Section 14d-2 under the Exchange Act, an offer (the "Target  Tender Offer")
to purchase all of the  outstanding  shares of capital  stock of GeoScience
(the "Target Shares") pursuant to the Merger  Agreement.  The Company shall
not and shall cause the  Offering  Entity not to raise the price to be paid
per Target  Share  pursuant to the Target  Tender Offer as set forth in the
Merger Agreement without the prior written consent of the Purchaser.

5.4  Rights Offering
     ---------------

As soon as possible following the date hereof,  the Company shall,  subject
to  market  conditions  and  the  effectiveness  of  the  U.S.  and  French
prospectuses related thereto, take all steps necessary to commence a rights
offering for its ordinary shares  (augmentation de capital avec maintien de
droit  preferentiel de  souscription)  in the United States and Europe (the
"Rights  Offering").  The  Company  shall  use its best  efforts  to obtain
pursuant to the Rights  Offering gross proceeds before  underwriters'  fees
and commissions of at least 90,000,000 euros.

5.5  Conduct of Business
     -------------------

From the date hereof until the Closing  Date,  unless the  Purchaser  shall
have consented in writing thereto,  the Company shall, and shall cause each
of its subsidiaries to, (i) conduct its operations  according to its usual,
regular and ordinary course of business consistent with past practice; (ii)
preserve intact its business  organization in all material respects;  (iii)
not amend its statuts or equivalent  governing  document  except to reflect
the increase in the Company's  capital  resulting from the Rights Offering;
(iv) not issue, sell, pledge, redeem,  purchase or otherwise acquire, grant
or register for  issuance or sale any shares of its capital  stock or other
ownership  interests (other than issuances of the Company's ordinary shares
pursuant to the Rights  Offering or existing  stock option  plans),  or any
securities  convertible  into  or  exchangeable  for  any  such  shares  or
ownership  interest,  or any rights,  warrants or options to acquire any of
the foregoing other than options to acquire shares of capital stock granted
to  employees  pursuant  to existing  employee  stock  option  plans in the
ordinary course of business  consistent  with past practice;  or accelerate
any right to convert or exchange or acquire any of its  securities  for any
such shares or ownership interest;  (v) not change its capitalization as it
exists on the date hereof,  other than  pursuant to the Rights  Offering on
existing  stock  option  plans;  (vi)  not  declare,  set  aside or pay any
dividend  or make any other  distribution  or payment  with  respect to any
shares of its capital stock or other ownership  interests  (other than such
payments  by a wholly  owned  subsidiary);  (vii) not  acquire  by  merger,
purchase  or  any  other  manner,   any  business  or  entity  (other  than
GeoScience) or otherwise  acquire any assets for consideration in excess of
FRF 10,000,000,  individually or in the aggregate,  except for purchases of
inventory, supplies or capital equipment in the ordinary course of business
consistent  with  past  practice;  and  (viii)  not  incur  or  assume  any
additional material long-term debt other than debt of GeoScience assumed as
a result of the  acquisition  of  GeoScience  pursuant to the Target Tender
Offer.

5.6  Required Notices and Deliveries
     -------------------------------

     (a) From the date hereof  until the Closing  Date,  the Company  shall
give  prompt   written  notice  to  the  Purchaser  of  (a)  any  facts  or
circumstances or the occurrence of any event or the failure of any event to
occur,  which has or is reasonably likely to have a Material Adverse Effect
or a material  adverse  effect on the  ability of the  Company to issue the
Shares or  consummate  any  other  transactions  contemplated  hereby or to
satisfy  its  obligation  hereunder,  (b)  the  institution  or  threat  of
institution of any litigation or similar action with respect to the Company
or the consummation of the transactions  contemplated  hereby,  and (c) the
breach of any representation or warranty of the Company contained herein or
the occurrence of any event or the discovery of any facts or  circumstances
which results or is  reasonably  likely to result in the failure (i) of any
representation  or warranty  of the  Company  set forth  herein to continue
being true and  correct  or (ii) of any  condition  precedent  set forth in
Article 4 to be fulfilled. From the date hereof until the Closing Date, the
Company shall promptly  deliver to the Purchaser true and correct copies of
any registration statement,  report,  prospectus or other document filed by
it with the U.S. Securities and Exchange Commission or the COB.

     (b) From the date hereof until the Closing Date,  the Purchaser  shall
give prompt written notice to the Company of (a) any facts or circumstances
or the occurrence of any event or the failure of any event to occur,  which
has or is  reasonably  likely  to have a  material  adverse  effect  on the
ability of the Purchaser to consummate any transaction  contemplated hereby
or to satisfy its obligations  hereunder,  (b) the institution or threat of
institution  of any  litigation  or  similar  action  with  respect  to the
Purchaser or the consummation of the transactions  contemplated hereby, and
(c) the breach of any representation or warranty of the Purchaser contained
herein  or the  occurrence  of any event or the  discovery  of any facts or
circumstances  which  results  or is  reasonably  likely  to  result in the
failure (i) of any  representation  or warranty of the  Purchaser set forth
herein to continue being true or (ii) of any condition  precedent set forth
in Article 4 to be fulfilled.

5.7  No Shop
     -------

From the date hereof until the Closing Date, the Company will not, and will
not  authorize  or permit any of its  officers  or  directors  or any other
Person on its behalf to, solicit, encourage,  negotiate or accept any offer
from any party  concerning  (i) the financing of the purchase of any Target
Shares  whether  through  the  issuance  by  the  Company  or  one  of  its
Subsidiaries  of equity  securities or the incurrence by the Company or any
of its  Subsidiaries  of  indebtedness  or  (ii)  any  other  agreement  or
arrangement  that  would  be  inconsistent  with  the  consummation  of the
transactions  contemplated  hereby (each a "Prohibited  Transaction"),  nor
will they  participate in any  discussions or  negotiations  regarding,  or
furnish any information with respect to, or facilitate in any other manner,
any  Prohibited  Transaction.  The Company will  immediately  terminate any
existing  discussion  with a third Person  regarding a possible  Prohibited
Transaction.  The Company will promptly  notify the Purchaser in writing of
any  inquiries  or  proposals  from any third  Person  regarding a possible
Prohibited Transaction.

5.8  Other Investors
     ---------------

So  long  as the  Purchaser  or its  Affiliates  hold  at  least  5% of the
Company's  ordinary shares directly or through American  depository  shares
("ADSs"),  in the event that the Company desires to issue shares or ADSs or
securities  convertible or  exercisable  into shares or ADSs for cash under
circumstances  where the  shareholders of the Company would be requested to
waive their preemptive rights (droits  preferentiels de souscription)  with
respect to such issuance,  such that such third Person or a group including
such third Person would own upon the  acquisition of such shares or ADSs or
the conversion of such  securities or exercise of such rights,  directly or
indirectly,  shares  constituting 5% or more of the then outstanding shares
or ADSs of the  Company  (a  "Proposed  Transaction"),  the  Company  shall
promptly  as  practicable  inform  the  members of the  Company's  board of
directors of the material terms of the Proposed  Transaction  and negotiate
in good faith with any shareholder or group of shareholders  represented on
the Company's  board of directors with respect to any good faith  competing
proposal  that  such  shareholder  or group  may  determine  to make to the
Company.

5.9  Use of Proceeds
     ---------------

The Company shall use the proceeds from the issuance and sale of the Shares
hereunder  in the  following  order (i) to fund the  acquisition  of Target
Shares  pursuant  to the  Target  Tender  Offer,  (ii) to fund  the  Merger
Consideration  (as  defined  in the  Merger  Agreement)  to be  paid to the
holders of Target Shares not tendered and purchased by the Offering  Entity
pursuant to the Target  Tender Offer  pursuant to the Merger (as defined in
the Merger  Agreement)  on the terms and subject to the  conditions  of the
Merger  Agreement,  (iii) to satisfy any valid claims for appraisal made by
any of GeoScience's  shareholders  dissenting from the Merger,  and (iv) to
pay the fees and expenses of the Company  relating to any of the foregoing,
and thereafter for any good and valid corporate purpose of the Company.

5.10 ADR Facility
     ------------

So long as the Purchaser or its  Affiliates  hold in the aggregate at least
5% of the Company's  ordinary  shares,  the Company shall  maintain in full
force and effect its current Deposit  Agreement between the Company and The
Bank of New York as depositary with respect to its ADR facility,  and shall
ensure  that the  Purchaser  and its  Affiliates  shall  have the  right to
exchange their ordinary  shares for ADSs in accordance  therewith or shall,
at the Purchaser's request,  enter into an alternate agreement with another
depositary on terms and conditions reasonably satisfactory to the Purchaser
and the Company to permit such  conversion,  in each case at the  Company's
expense. During such time period, the Company shall use its best efforts to
maintain the listing of the Company's  ADRs on the New York Stock  Exchange
(the "NYSE") and maintain the listing of its ordinary shares on the Premier
Marche  of the  Paris  Bourse  and  shall  file with the NYSE and the Paris
Bourse all documents  and notices  required by either the NYSE or the Paris
Bourse of companies whose securities are traded thereon.

5.11 Publicity
     ---------

The  Company  and the  Purchaser  agree not to issue any press  release  or
otherwise make any public  statements with respect to this Agreement or the
other  transactions  contemplated  hereby without the consent of the other,
except  as may be  required  by law so long as it has used  all  reasonable
efforts to consult with the Company or the  Purchaser,  as the case may be,
and to obtain the  consent of such party but has been  unable to do so in a
timely manner.

5.12 Parity Right of Access
     ----------------------

From the date of this  Agreement  until the Closing,  the Company shall (i)
subject to the  requirements  of French  law,  give the  Purchaser  and its
authorized  representatives  reasonable  access at reasonable  times to the
president  and other  officers of the Company,  (ii) furnish the  Purchaser
with such documents and other  information with respect to the business and
properties of the Company as provided to the U.S. and European underwriters
participating in the Rights Offering,  and (iii) provide the Purchaser with
reasonable  advance notice of, and permit the Purchaser to participate  in,
any  meetings  held between the Company and any such  underwriters  for due
diligence  purposes  whether  such  meetings  are  held  in  person  or  by
telephone, video or internet conference.

5.13 Failure to Fund
     ---------------

If the  Company  breaches  its  obligation  under the Merger  Agreement  to
purchase  the  Target  Shares  due  solely to a breach  of the  Purchaser's
obligation  hereunder  to purchase the Shares (and not as the result of any
breach by the Company of its  obligations  hereunder  or the failure of any
condition  set forth in Article  4.1 to be  fulfilled)  and, as a result of
such breach,  the Company  becomes  obligated to pay a  termination  fee to
GeoScience  pursuant  to the Merger  Agreement,  then the  Purchaser  shall
promptly pay to the Company  according to the  Company's  instructions  the
lesser  of the  amount  of  such  termination  fee  and  USD  1,500,000  as
liquidated  damages promptly following the Company's payment of such amount
to GeoScience  upon  presentation  to the Purchaser of reasonable  evidence
that such  amount has been paid.  Payment by the  Purchaser  of such amount
shall  be the  exclusive  remedy  of the  Company  for  any  breach  by the
Purchaser of its obligation to purchase the Shares hereunder.

5.14 Completion of Listing Formalities
     ---------------------------------

The  Company  shall  complete  the  Final  Listing  Formalities  as soon as
possible after the Closing Date and shall otherwise  ensure that the Shares
are listed for trading on the Paris Bourse.

5.15 D+O Insurance Coverage
     ----------------------

The  Company  shall  extend and  maintain at all times  coverage  under its
directors' and officers'  liability insurance policy for the benefit of all
Beacon  Nominees  elected to serve on the  Company's  board of directors or
obtain  equivalent  coverage for the benefit of such Beacon  Nominees  with
insurers and on terms reasonably acceptable to the Purchaser.


                                 ARTICLE 6
                                 ---------

                              INDEMNIFICATION

Consideration for Purchase
- --------------------------

The Purchaser has agreed to perform its  obligations  hereunder,  including
its   obligation  to  purchase  the  Shares,   in   consideration   of  the
representations,  warranties,  agreements  and covenants of the Company set
forth herein.

6.2  General Indemnification
     -----------------------

The  Company  shall  indemnify,   defend  and  hold  each  Purchaser,   its
affiliates,  and each of their respective  officers,  directors,  partners,
managing   directors,    affiliates,    employees,   agents,   consultants,
representatives,  successors  and  assigns  (each  an  "Purchaser  Entity")
harmless  from and against all Losses (as defined in Article 6.3)  incurred
or suffered by a Purchaser Entity (whether incurred or suffered directly or
indirectly through the ownership of Shares) arising out of, relating to, or
resulting  from  any  material  breach  of  any  of  the   representations,
warranties,  covenants or agreements  made by the Company in this Agreement
or in  any  certificate  or  other  instrument  delivered  pursuant  hereto
including, without limitation, the Registration Rights Agreement.

6.3  Indemnification Principles
     --------------------------

For  purposes of this  Article 6,  "Losses"  shall mean each and all of the
following items: losses, prejudice, liabilities, damages, fees or expenses,
including  reasonable fees,  expenses and disbursements of counsel in light
of the customs and practices in existence in the country involved.

6.4  Survival
     --------

The   representations,   warranties,   covenants,   agreements   and  other
obligations  of  the  Company   hereunder  shall  remain  in  effect  after
completion of the issuance of the Shares or, if applicable, the termination
of this Agreement for any reason.


                                 ARTICLE 7
                                 ---------

                               MISCELLANEOUS

7.1  Termination
     -----------

The  obligations  of the  parties  to effect the sale and  purchase  of the
Shares hereunder may be terminated (i) by the mutual written consent of the
Company  and  the  Purchaser,  (ii) by the  Purchaser  in  writing  without
liability  to the  Purchaser on account of such  termination  if the Merger
Agreement is terminated without the Company having acquired at least 80% of
the outstanding  capital stock of GeoScience pursuant thereto, or if any of
the  conditions  precedent  to the  Closing  set forth in Article 4.1 shall
become  by its  terms  impossible  to  fulfill,  or (iii)  by any  party in
writing,   without  liability  to  the  other  party  on  account  of  such
termination (provided that the terminating party is not otherwise in breach
or default under this Agreement), if the Closing shall not have occurred on
or before April 30, 2000.

7.2  Governing Law
     -------------

This  Agreement  shall be governed  in all  respects  by and  construed  in
accordance with the laws of the Republic of France without giving effect to
its conflicts of law principles, except that the provisions herein relating
to the  securities  laws of the United States shall be governed by the laws
of the United States.  Any dispute,  controversy or claim arising out of or
relating to this Agreement shall be submitted to the exclusive jurisdiction
of the Tribunal de Commerce of Paris.

7.3  Successors and Assigns
     ----------------------

This Agreement  shall be binding upon and shall inure to the benefit of the
parties hereto and their respective  successors and assigns. This Agreement
may not be assigned by the Company without the prior written consent of the
Purchaser.  The  parties  acknowledge  that,  subject  to  compliance  with
applicable  securities  laws,  the Purchaser may transfer and assign any or
all of the Shares and all or any part of its rights and  obligations  under
this Agreement to one or more other partnerships,  corporations,  trusts or
other  organizations  which have been  created  by, or are  controlled  by,
control or are under common control with the Purchaser, without the consent
of the Company;  provided,  however, that such transfer or assignment shall
not relieve the Purchaser of its obligations under this Agreement.

7.4  Entire Agreement; Amendment
     ---------------------------

This Agreement and the other documents delivered pursuant hereto constitute
the full and entire  understanding  and agreement  between the parties with
regard to the subject  matter  hereof and thereof and  supersede  all prior
agreements  and  understandings  among the parties  relating to the subject
matter  hereof.  Neither this Agreement not any term hereof may be amended,
waived,  discharged or terminated other than by a written instrument signed
by the  party  against  whom  enforcement  of any such  amendment,  waiver,
discharge or termination is sought.

7.5  Notice and Dates
     ----------------

Any  notice or other  communication  given  under this  Agreement  shall be
sufficient if in writing and delivered by hand, by messenger or by courier,
or transmitted by confirmed facsimile,  to a party at its address set forth
below (or at such other address as shall be designated  for such purpose by
such party in a written notice to the other party hereto):

     (a)  If to the Company, at:

          Compagnie Generale de Geophysique
          1 rue Leon Migaux
          91341 Massy Cedex, France
          Attention:  Robert Brunck
          Facsimile:  33 1 64 47 39 70

     (b)  If to the Purchaser, at:

          The Beacon Group Energy Investment Fund II, L.P.
          399 Park Avenue
          New York, NY 10022
          Attention:  Robert F. Semmens
          Facsimile:  1-212-339-9109

Each such  notice or other  communication  shall for all  purposes  of this
Agreement be treated as effective or as having been given when delivered if
delivered personally, by messenger or by courier, or, if sent by facsimile,
upon confirmation of receipt by return facsimile.

7.6  Further Assurances
     ------------------

The parties  hereto shall do and perform or cause to be done and  performed
all such  further  acts and things and shall  execute  and deliver all such
other agreements, certificates, instruments or documents as any other party
may  reasonably  request from time to time in order to carry out the intent
and purposes of this  Agreement and the  consummation  of the  transactions
contemplated   hereby.   Neither  the  Company  nor  the  Purchaser   shall
voluntarily   undertake  any  course  of  action   inconsistent   with  the
satisfaction  of the  requirements  applicable  to them  set  forth in this
Agreement  and  each  shall  promptly  do all  such  acts and take all such
measures  as may be  appropriate  to  enable  them to  perform  as early as
practicable the obligations herein required to be performed by them.

7.7  Originals
     ---------

This Agreement is executed in New York in two (2) original copies and shall
become effective on the date hereof.

7.8  Severability
     ------------

In the event that any provision of this Agreement becomes or is declared by
a court of competent  jurisdiction  to be illegal,  unenforceable  or void,
this  Agreement  shall  continue  in full  force and  effect  without  said
provision which shall be replaced with an enforceable  provision closest in
intent and economic effect as the severed provision.

7.9  Captions
     --------

Headings of the various  Articles of this  Agreement have been inserted for
convenience  of reference  only and shall not be relied upon in  construing
this  Agreement.  Use of any gender  herein to refer to any person shall be
deemed to  comprehend  masculine,  feminine  and neuter  unless the context
clearly requires otherwise.

7.10 Brokers
     -------

     (a) Except as set forth in the Engagement  Letter, the Company has not
engaged,   consented  to,  or  authorized  any  bank,  broker,   finder  or
intermediary,  to act on its  behalf,  directly or  indirectly,  as a bank,
broker,   finder  or  intermediary  in  connection  with  the  transactions
contemplated by this Agreement.  The Company hereby agrees to indemnify and
hold harmless the Purchaser from and against all fees, commissions or other
payments  owing to any  person or firm  acting  on  behalf  of the  Company
hereunder.

     (b) Except as set forth in the  Engagement  Letter,  the Purchaser has
not engaged, consented to or authorized any broker, finder or intermediary,
to act on its  behalf  directly  or  indirectly,  as a  broker,  finder  or
intermediary  in  connection  with the  transactions  contemplated  by this
Agreement.  Except as set forth in the  Engagement  Letter,  the  Purchaser
hereby  agrees to indemnify  and hold harmless the Company from and against
all fees,  commissions or other payments  owning to any such person or firm
acting on behalf of the Purchaser hereunder.

7.11 Certain Definitions
     -------------------

As used in this Agreement,  the following terms shall have the meanings set
forth below:

     (a)  "Authority"  means any court,  arbitral panel, or governmental or
administrative  body or agency whether  supra-national,  French or foreign,
national or local;

     (b) "Business  Day" means any day on which banks are open for business
in Paris and New York;

     (c) "FRF" means the lawful currency of the Republic of France; and

     (d) "Person"  means an individual,  partnership,  corporation or other
entity, business, enterprise or association.

7.12 Attorney's Fees
     ---------------

The prevailing  party in any litigation  between the Purchaser,  on the one
hand, and the Company, on the other hand, involving this Agreement shall be
entitled to recover from the other party its reasonable attorney's fees and
costs.

7.13 Costs and Expenses
     ------------------

Except as otherwise  provided in the Engagement  Letter,  each party hereto
shall pay its own costs  and  expenses  incurred  in  connection  herewith,
including  the fees of its  counsel,  auditors  and other  representatives,
whether or not the transactions contemplated herein are consummated.

7.14 No Third Party Rights
     ---------------------

Nothing in this Agreement shall create or be deemed to create any rights in
any person or entity not a party to this Agreement.

7.15 Competing Business Interests
     ----------------------------

The Company  hereby  acknowledges  that the  Purchaser,  its affiliates and
certain  companies  and  other  entities  in which  the  Purchaser  and its
affiliates  currently have ownership interests or may invest in, acquire or
otherwise enter into strategic  relationships with, may presently or in the
future have businesses or otherwise undertake  activities that may directly
or indirectly  compete with or provide a strategic fit with the business of
the Company as such business is presently  conducted or may be conducted in
the future and may presently or in the future independently develop or sell
products or services which may directly or indirectly compete with products
or services developed or sold by the Company. The Purchaser shall adopt and
maintain confidentiality,  chinese wall and other procedures appropriate in
its reasonable judgment to ensure that confidential  information  regarding
the  Company  is not  disclosed  to third  Persons  as a result of any such
interests,  relationships  or activities and shall cause any Beacon Nominee
to resign from the Company's board of directors if such  resignation is, in
the opinion of French counsel mutually  acceptable to the Purchaser and the
Company,  required by the fiduciary  duties under French law of such Beacon
Nominee to the  Company  as a result of such  interests,  relationships  or
activities.

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

COMPAGNIE GENERALE DE GEOPHYSIQUE


By: /s/ Robert Brunk
   ------------------------
Name: R. Brunk
     ----------------------
Title: Chairman and CEO
      ---------------------


THE BEACON GROUP ENERGY INVESTMENT FUND II, L.P.


By:       BEACON ENERGY INVESTORS II, L.P., its general partner

          By: /s/ John MacWilliams
            ----------------------------
               Authorized Signatory

<PAGE>
                              LIST OF EXHIBITS


Exhibit A      Bulletin de souscription

Exhibit B      Registration Rights Agreement

Exhibit C      Form of Jones, Day, Reavis & Pogue Legal Opinion

Exhibit D      Expense Reimbursement Agreement

Exhibit E      Form of Fried, Frank, Harris, Shriver & Jacobson Legal Opinion




                                 EXHIBIT 2

                          REGISTRATION RIGHTS AGREEMENT
                          -----------------------------


REGISTRATION RIGHTS AGREEMENT, dated as of December 10, 1999, by and among,
THE BEACON  GROUP  ENERGY  INVESTMENT  FUND II,  L.P.,  a Delaware  limited
partnership,  (the "Investor"),  and COMPANGIE  GENERALE DE GEOPHYSIQUE,  a
societe anonyme organized under French law (the "Company").


                              W I T N E S S E T H:


WHEREAS,  the  Company  and the  Investor  are  parties  to a  Subscription
Agreement,  dated as of October 23, 1999 (as amended from time to time, the
"Subscription Agreement"),  pursuant to which the Company has issued to the
Investor,  and the  Investor  have  purchased  Ordinary  Shares (as defined
below) from the Company (the "Shares");

WHEREAS,  in connection with the entry by the Company and the Investor into
the Subscription Agreement,  the Company has agreed to provide registration
rights to the Investor with respect to the Shares and the ADRs set forth in
this Agreement.

ACCORDINGLY, the parties hereto hereby agree as follows:

1.   Certain Definitions
     -------------------

     (a) In addition to the terms defined in the preamble  hereto,  as used
in this Agreement,  the following terms shall have the meanings assigned to
them below:

     1.1 "Additional Piggyback Rights" has the meaning set forth in Section
2.1(e).

     1.2  "Affiliate"  shall  mean with  respect to any  Person,  any other
Person directly or indirectly  controlling or controlled by or under direct
or indirect common control with such specified Person.

     1.3 "American  Depositary  Receipts" or "ADRs" shall mean the American
depositary  receipts  evidencing the ADSs issued by the Depositary pursuant
to the Deposit  Agreement,  dated  as of  _____________________ between the
Company and the Bank of New York as Depositary,  as amended  (the  "Deposit
Agreement").

     1.4  "American  Depositary  Shares" or "ADSs"  shall mean the American
depositary shares of the Company which each represent a one-fifth  interest
in an Ordinary Share deposited with the Depositary.

     1.5 "Authorized Agent" has the meaning set forth in Section 4.6(i).

     1.6 "Claims" has the meaning set forth in Section 2.9(a).

     1.7 "Commission" or "SEC" shall mean the United States  Securities and
Exchange Commission.

     1.8  "Company  Securities"  has  the  meaning  set  forth  in  Section
2.3(b)(ii).

     1.9  "Demand  Exercise  Notice"  has the  meaning set forth in Section
2.1(a).

     1.10  "Demand  Registrations"  has the  meaning  set forth in  Section
2.1(a).

     1.11  "Demand  Registration  Requests"  has the  meaning  set forth in
Section 2.1(a).

     1.12 "Deposit Agreement" shall mean the Deposit Agreement, as amended,
between the Depositary and the Company  pursuant to which certain  Ordinary
Shares have been and may be deposited  with the  Depositary in exchange for
the delivery of ADSs.

     1.13  "Depositary"  shall mean The Bank of New York or such  successor
depositary appointed pursuant to the Deposit Agreement.

     1.14  "Dollars"and  the  symbols  "$"  or  "US$"  shall  mean,  unless
otherwise indicated, U.S. dollars.

     1.15 "Exchange Act" shall mean the Securities Exchange Act of 1934, as
amended, of the United States of America.

     1.16  "Excluded  Registration"  has the  meaning  set forth in Section
2.2(a).

     1.17 "Expenses" has the meaning set forth in Section 2.5(a).

     1.18 "Holder" or "Holders"  shall mean the Investor and any Person who
shall hereafter acquire and hold Registrable Securities; provided that such
party has become a signatory  to this  Agreement  and agreed to be bound by
the terms of this Agreement applicable to a "Holder".

     1.19  Investor  Securities"  has the  meaning  set  forth  in  Section
2.3(b)(iii).

     1.20 Litigation" has the meaning set forth in Section 4.6(i).

     1.21 Major Holder" has the meaning set forth in Section 2.4(a).

     1.22 Manager" has the meaning set forth in Section 2.3(a).

     1.23 "NASD" shall mean the National Association of Securities Dealers,
Inc.

     1.24 "New York Court" has the meaning set forth in Section 4.6(i).

     1.25 "Ordinary Shares" shall mean the ordinary shares par value of FRF
10 per  ordinary  share of the  Company  which may be  represented  by ADSs
evidenced by ADRs,  or, in the case of a  conversion,  reclassification  or
exchange  of such  Ordinary  Shares,  shares of the stock into or for which
such  shares  of  Ordinary  Shares  shall  be  converted,  reclassified  or
exchanged,   and  all  provisions  of  this  Agreement   shall  be  applied
appropriately  thereto  and to any  stock  resulting  from  any  subsequent
conversion, reclassification or exchange therefor.

     1.26 "Ordinary Share Equivalents" shall mean all options, warrants and
other securities  convertible  into, or exchangeable or exercisable for, at
any time or upon the  occurrence  of any event or  contingency  and without
regard to any vesting or other  conditions to which such  securities may be
subject, Ordinary Shares and/or ADSs.

     1.27  "Other  Demand  Holders"  has the  meaning  set forth in Section
2.3(b).

     1.28 "Other Demand  Holders  Securities"  has the meaning set forth in
Section 2.3(b)(i).

     1.29  "Person"  shall mean an  individual,  corporation,  partnership,
limited  liability   company,   firm,   association,   trust,   government,
governmental  agency or other  entity,  whether  acting  in an  individual,
fiduciary or other capacity.

     1.30  "Postponement  Period"  has the  meaning  set  forth in  Section
2.1(d).

     1.31  "Qualified  Independent  Underwriter"  shall  mean a  "qualified
independent underwriter" within the meaning of the rules of the NASD.

     1.32  "Register",  "Registered"  and  "Registration"  shall refer to a
registration  effected by preparing and filing a registration  statement in
compliance with the U.S.  Securities Act and the declaration or ordering of
the effectiveness of such registration statement.

     1.33 "Registrable  Securities" shall mean (i) any Ordinary Shares held
as of the  date  hereof  by  the  Investor  or  hereafter  acquired  by the
Investor;  or (ii) any ADSs  evidenced  by ADRs  hereafter  acquired by the
Investor;  (iii) any Ordinary Shares or any ADSs evidenced by ADRs acquired
by any Person  after the date hereof from the  Investor;  or (iv) any stock
issued  or  issuable,   directly  or  indirectly,   upon  any  subdivision,
combination or  reclassification of such stock or stock dividend in respect
of the Ordinary  Shares or ADSs  referenced  in clauses (i), (ii) and (iii)
above;  provided,  however,  that with respect to a registration  statement
pursuant  to  Section  2.1 or Section  2.2,  Registrable  Securities  shall
include all Ordinary Shares or ADSs (including  shares  obtainable upon the
exercise,  exchange or conversion of any Ordinary Share  Equivalents) owned
by each of the parties to this  Agreement  (other than the Company).  As to
any particular  Registrable  Securities,  such securities shall cease to be
Registrable  Securities  when (i) a registration  statement with respect to
the sale of such  securities  shall have been declared  effective under the
applicable  securities laws and such securities shall have been disposed of
in  accordance  with such  registration  statement or (ii) such  securities
shall have been sold (other than in a privately  negotiated  sale) pursuant
to Rule 144 (or any  successor  or  comparable  provision)  under  the U.S.
Securities  Act and in  compliance  with the  requirements  of Rule 144, or
(iii) such  securities are saleable by the holder thereof  pursuant ot Rule
144 (k) without any volume limitation applicable thereto.

     1.34  "Section  2.1 Sale  Number" has the meaning set forth in Section
2.3(a).

     1.35  "Section  2.2 Sale  Number" has the meaning set forth in Section
2.3(b).

     1.36  "Securities  Act" shall  mean the  Securitites  Act of 1933,  as
amended, of the United States of America.

     1.37  "Valid  Business  Reason"  has the  meaning set forth in Section
2.1(d).

     (b) Capitalized terms used but not otherwise defined herein shall have
the meanings assigned to such terms in the Subscription Agreement.

2.   Registration Rights
     -------------------

     2.1  Demand Registrations
          --------------------

          (a)  Subject to  Sections  2.1(d) and 2.3 below,  at any time and
from time to time any Holder shall have the right to require the Company to
file a  registration  statement  under the Securities Act and the rules and
regulations promulgated thereunder covering all or part of their respective
Registrable  Securities,  by delivering a written  request  therefor to the
Company  specifying the number of Registrable  Securities to be included in
such  registration  by such Holder and the intended  method of distribution
thereof.  All requests  pursuant to this Section 2.1 are referred to herein
as "Demand  Registration  Requests,"  and the  registrations  requested are
referred to herein as "Demand  Registrations".  As promptly as practicable,
but no later than ten days after receipt of a Demand Registration  Request,
the Company  shall give written  notice (the "Demand  Exercise  Notice") of
such Demand  Registration  Request to all Holders of record of  Registrable
Securities.

          (b) The Company,  subject to Sections 2.3 and 2.7,  shall include
in a Demand Registration (i) the number of Registrable Securities requested
by such Holder and (ii) the Registrable  Securities of any other Holder who
shall have made a written  request to the  Company  for  inclusion  in such
Demand  Registration  (which  request shall  specify the maximum  number of
Registrable Securities intended to be disposed of by such Holder) within 30
days after the receipt of the Demand Exercise Notice.

          (c) The Company shall, as expeditiously  as possible  following a
Demand  Registration  Request,  use its best  efforts  to (i)  effect  such
registration  under  the  Securities  Act and  the  rules  and  regulations
promulgated  thereunder of the Registrable Securities which the Company has
been so requested to register,  for  distribution  in accordance  with such
intended  method of  distribution  and (ii) if  requested  by the  Holders,
obtain  acceleration  of the effective date of the  registration  statement
relating to such registration.

          (d) The Demand  Registration rights granted under Section 2.1 are
subject to the following limitations: (i) the Company shall not be required
to cause a  registration  pursuant to Section 2.1 to be declared  effective
within a period of 180 days after the  effective  date of any  registration
statement of the Company filed pursuant to a Demand Registration Request or
within a period  of 180 days  after  the date  such  Holder  was  given the
opportunity to register its Registrable  Securities pursuant to Section 2.2
(provided  that in connection  with such  registration  pursuant to Section
2.2, the number of Registrable  Securities requested to be included by such
Holder was not reduced  pursuant to Section 2.3); (ii) if the Board, in its
good  faith  judgment,  determines  that any  registration  of  Registrable
Securities  should not be made or  continued  because  it would  materially
interfere   with   any   material   financing,    acquisition,    corporate
reorganization or merger involving the Company or would require  disclosure
of  information,   the  premature  disclosure  of  which  would  materially
adversely affect the Company (a "Valid Business  Reason"),  (A) the Company
may  postpone  filing  a  registration   statement  relating  to  a  Demand
Registration Request until such Valid Business Reason no longer exists, but
in no  event  for  more  than  120  days,  and (B) in  case a  registration
statement has been filed  relating to a Demand  Registration  Request,  the
Company  may cause such  registration  statement  to be  withdrawn  and its
effectiveness  terminated or may postpone  amending or  supplementing  such
registration  statement  until such Valid Business Reason no longer exists,
but in no event for more than 120 days  (such  period  of  postponement  or
withdrawal  under  subclauses  (A) or  (B)  of  this  paragraph  (d),  (the
"Postponement  Period");  and the Company shall give written  notice of its
determination  to postpone or withdraw a registration  statement and of the
fact that the Valid Business  Reason for such  postponement,  withdrawal or
premature  termination no longer exists,  in each case,  promptly after the
occurrence  thereof;  provided,  however,  that the  Company  shall  not be
permitted to postpone,  withdraw or  prematurely  terminate a  registration
statement  previously  subject to any  Postponement  Period ; and (iii) the
Company  shall not be  required to effect a  registration  pursuant to this
Section 2.1 with respect to a Demand Registration Request by any Holder, if
the anticipated  aggregate offering price of the Registrable  Securities to
be sold is less than $20 million.

          If  the  Company  shall  give  any  notice  of   postponement  or
withdrawal of any registration statement, the Company shall not, during the
Postponement  Period,  register any Ordinary Shares or ADSs for the account
of  any  other  Person   (other  than  in   connection   with  an  Excluded
Registration).  Each Holder of  Registrable  Securities  agrees that,  upon
receipt of any notice from the Company that the Company has  determined  to
withdraw any  registration  statement  pursuant to clause (ii) above,  such
party will discontinue its disposition of Registrable  Securities  pursuant
to such  registration  statement  and, if so directed by the Company,  will
deliver to the Company (at the  Company's  expense) all copies,  other than
permanent file copies, then in such party's  possession,  of the prospectus
covering  such  Registrable  Securities  that was in  effect at the time of
receipt of such notice.  If the Company shall have withdrawn or prematurely
terminated  a  registration  statement  filed under  Section  2.1  (whether
pursuant to this paragraph (d) or as a result of any stop order, injunction
or other order or requirement  of the Commission or any other  governmental
agency or court),  the Company  shall not be considered to have effected an
effective registration for the purposes of this Agreement until the Company
shall have filed a new  registration  statement  covering  the  Registrable
Securities covered by the withdrawn or prematurely terminated  registration
statement  and such  subsequent  registration  statement  shall  have  been
declared  effective  and  shall  not have  been  withdrawn  or  prematurely
terminated.  If  the  Company  shall  give  any  notice  of  withdrawal  or
postponement of a registration  statement,  the Company shall, at such time
as the Valid Business Reason that caused such withdrawal or postponement no
longer  exists  (but in no event  later than 120 days after the date of the
withdrawal   or   postponement),   use  its  best  efforts  to  effect  the
registration  under  the  securities  laws  of the  Registrable  Securities
covered by the withdrawn or postponed  registration statement in accordance
with this  Section  2.1  (unless  the  Holders  shall have  withdrawn  such
request, in which case the Company shall not be considered to have effected
an effective registration for the purposes of this Agreement).

          (e) The  Company,  subject to Sections  2.3 and 2.7, may elect to
include in any registration statement and offering made pursuant to Section
2.1, any Ordinary Shares or ADSs which are requested to be included in such
registration  pursuant to the  exercise of  piggyback  registration  rights
granted by the Company after the date hereof in  accordance  with the terms
of this Agreement ("Additional Piggyback Rights");  provided, however, that
such  inclusion  shall be permitted  only to the extent that it is pursuant
to, and subject to, the terms of any applicable  underwriting  agreement or
arrangements entered into by the Holders.

     2.2  Piggyback Registrations
          -----------------------

          (a) If at any  time,  the  Company  proposes  or is  required  to
register any of its equity securities under the securities laws (other than
a  registration  statement  (i) on Form  F-4 or S-8 or any  successor  form
thereto  or (ii)  filed in  connection  with an  offering  made  solely  to
employees  of  the  Company  or  its   subsidiaries   (each,  an  "Excluded
Registration")), whether or not for its own account, the Company shall give
prompt  written  notice of its intention to do so to each of the Holders of
record of Registrable  Securities.  Upon the written request of any Holder,
made within 20 days following the receipt of any such written notice (which
request shall specify the maximum number of Registrable Securities intended
to be disposed of by such Holder and the  intended  method of  distribution
thereof),  the Company shall,  subject to Sections 2.2(b), 2.3 and 2.7, use
its best efforts to cause all such Registrable  Securities,  the Holders of
which have so requested the  registration  thereof,  to be registered under
the  securities  laws (with the  securities  which the  Company at the time
proposes  to  register)  to  permit  the sale or other  disposition  by the
Holders (in accordance with the intended method of distribution thereof) of
the Registrable  Securities to be so registered.  No registration  effected
under this Section  2.2(a) shall relieve the Company of its  obligations to
effect  Demand  Registrations  under  Section  2.1,  except as set forth in
Section 2.1(d).

          (b) If at any time after giving  written  notice of its intention
to register any equity  securities  and prior to the effective  date of the
registration  statement  filed in connection  with such  registration,  the
Company  shall  determine  for  any  reason  not to  register  or to  delay
registration of such equity  securities,  the Company may, at its election,
give written  notice of such  determination  to all Holders of  Registrable
Securities,  and (i) in the case of a determination not to register,  shall
be relieved of its  obligation  to register any  Registrable  Securities in
connection with such abandoned registration, without prejudice, however, to
the rights of Holders of Registrable  Securities under Section 2.1 and (ii)
in the case of a  determination  to delay such  registration  of its equity
securities,   shall  be  permitted  to  delay  the   registration  of  such
Registrable Securities for the same period as the delay in registering such
other equity securities.

          (c) Any Holder  shall have the right to withdraw  its request for
inclusion  of its  Registrable  Securities  in any  registration  statement
pursuant to this Section 2.2 by giving written notice to the Company of its
request to withdraw;  provided, however, that (A) such request must be made
in writing  prior to the execution of the  underwriting  agreement (or such
other similar  agreement)  with respect to such  registration  and (B) such
withdrawal shall be irrevocable and, after making such withdrawal, a Holder
shall no longer have any right to include such  Registrable  Securities  in
the registration as to which such withdrawal was made.

     2.3  Allocation of Securities Included in Registration Statement
          -----------------------------------------------------------

          (a)  If  any  requested  registration  pursuant  to  Section  2.1
involves an underwritten offering and if the lead managing underwriter (the
"Manager")  shall  advise  the  Company  that,  in its view,  the number of
securities  requested to be included in such registration  (including those
securities  requested  by the Company to be included in such  registration)
exceeds the largest number (the "Section 2.1 Sale Number") that can be sold
in an orderly  manner in such offering  within a price range  acceptable to
the Holders, the Company shall include in such registration:

               (i)  first,  all  Registrable  Securities  requested  to  be
included  pursuant  to  Section  2.1(b)(i)  in  such  registration  by  the
Investor;

               (ii)  second,  to the extent that the number of  Registrable
Securities  to be included  pursuant to Section  2.3(a)(i) is less than the
Section  2.1  Sale  Number,  all  Registrable  Securities  requested  to be
included  pursuant to Section  2.1(b)(i) in such  registration by all other
Holders;  provided,  however,  that  if  the  number  of  such  Registrable
Securities and the number of Registrable Securities to be included pursuant
to Section 2.3(a)  exceeds the Section 2.1 Sale Number,  then the number of
Registrable  Securities  (not to exceed the Section 2.1 Sale  Number) to be
included  in such  registration  shall be reduced on a pro rata basis among
all such Holders,  based on the number of Registrable  Securities  owned by
each such Holder requesting  inclusion pursuant to Section 2.1(b)(i) out of
the total outstanding  number of Ordinary Shares of the Company;  provided,
however,  that such  allocation  shall not operate to reduce the  aggregate
number of Registrable  Securities to be included in such registration below
the Section 2.1 Sale Number,  and if any Holder does not request  inclusion
of the maximum number of shares of Registrable Securities allocated to such
Holder pursuant to the above-described  procedure, the remaining portion of
such  Holder's  allocation  shall be  reallocated  among  those  requesting
Holders whose  allocations  did not satisfy their  requests pro rata on the
basis of the number of shares of Registrable Securities which would be held
by such  Holders,  and this  procedure  shall be repeated  until all of the
shares of Registrable  Securities which may be included in the registration
on behalf of the Holders have been so allocated;

               (iii)  third,  to the extent that the number of  Registrable
Securities to be included pursuant to Sections  2.3(a)(i) and 2.3(a)(ii) is
less than the Section 2.1 Sale Number, securities that the Company proposes
to register; and

               (iv)  fourth,  to the extent that the number of  Registrable
Securities to be included by all Holders pursuant to Sections 2.3(a)(i) and
2.3(a)(ii)  and the number of  securities  to be  included  by the  Company
pursuant to Section  2.3(a)(iii)  is less than the Section 2.1 Sale Number,
any other securities that the Holders thereof propose to register  pursuant
to the exercise of Additional Piggyback Rights.

          If,  as a result  of the  proration  provisions  of this  Section
2.3(a),  any  Holder  shall not be  entitled  to  include  all  Registrable
Securities  in a  registration  that such Holder has requested be included,
such  Holder may elect to  withdraw  his  request  to  include  Registrable
Securities in such  registration  or may reduce the number  requested to be
included;  provided, however, that (A) such request must be made in writing
prior to the execution of the  underwriting  agreement with respect to such
registration and (B) such withdrawal shall be irrevocable and, after making
such  withdrawal,  a Holder  shall no longer have any right to include such
Registrable  Securities in the registration as to which such withdrawal was
made.

          (b) If any  registration  pursuant  to Section  2.2  involves  an
underwritten offering and the Manager shall advise the Company that, in its
view,   the  number  of  securities   requested  to  be  included  in  such
registration exceeds the number (the "Section 2.2 Sale Number") that can be
sold  in an  orderly  manner  in such  registration  within  a price  range
acceptable  to the Company or, in the event such  underwritten  offering is
being made  pursuant  to the  request of the  holders of equity  securities
(other  than the  Holders)  exercising  their  demand  registration  rights
("Other Demand Holders"), within a price range acceptable to the holders of
a majority of the securities requested to be registered by the Other Demand
Holders, the Company shall include in such registration:

               (i) first, in event such underwritten offering is being made
at the  request  of Other  Demand  Holders,  all  Ordinary  Shares  or ADSs
requested  to be included by such Other Demand  Holders (the "Other  Demand
Holders Securities"); provided, however, that if the number of Other Demand
Holders Securities exceeds the Section 2.2 Sale Number,  then the number of
Other Demand  Holders  Securities  included in such  registration  shall be
reduced by such difference;

               (ii) second,  all  Ordinary  Shares or ADSs that the Company
proposes to register for its own account ("Company Securities");

               (iii)  third,  to the  extent  that the  number  of  Company
Securities and other Demand Holders Securities is less than the Section 2.2
Sale Number,  all  Registrable  Securities  requested to be included by the
Investor  pursuant to Section  2.2(a)  ("Investor  Securities");  provided,
however,  that,  if the  number of such  Investor  Securities  exceeds  the
Section  2.2 Sale Number  less the number of Company  Securities  and Other
Demand Holders Securities,  then the number of Investor Securities included
in such registration shall be reduced by such difference; and

               (iv) fourth, to the extent the number of Company Securities,
Investor  Securities and Other Demand  Holders  Securities is less than the
Section  2.2  Sale  Number,  all  Registrable  Securities  requested  to be
included by all other  holders of equity  securities  of the  Company  with
"piggyback registration rights";  provided,  however, if the number of such
securities  exceeds  the Section 2.2 Sale Number less the sum of the number
of (A) Company  Securities,  (B) Investor  Securities  and (C) Other Demand
Holders  Securities,  then the number of such  securities  included in such
registration  shall be reduced on a pro rata basis,  based on the number of
securities  owned by each holder of equity  securities  of the Company with
"piggyback  registration  rights"  (including  all  Holders  other than the
Investor)  requesting  inclusion to the number of  securities  owned by all
holders of equity  securities of the Company with  "piggyback  registration
rights"  (including  all  Holders  other  than  the  Investor)   requesting
inclusion;  provided,  however,  that such allocation  shall not operate to
reduce  the  aggregate   number  of  securities  to  be  included  in  such
registration below the Section 2.2 Sale Number, and if any holder of equity
securities  of the Company with  "piggyback  registration  rights" does not
request  inclusion of the maximum number of shares allocated to such holder
pursuant to the  above-described  procedure,  the remaining portion of such
holder's  allocation shall be reallocated  among those  requesting  holders
whose  allocations  did not satisfy their requests pro rata on the basis of
the number of shares of securities held by such holders, and this procedure
shall be  repeated  until  all of the  shares  of  securities  which may be
included  in the  registration  on  behalf  of the  holders  have  been  so
allocated.

     2.4  Registration Procedures
          -----------------------

If and whenever the Company is required by the provisions of this Agreement
to use its  best  efforts  to  effect  or  cause  the  registration  of any
Registrable  Securities  under  the  Securities  Act as  provided  in  this
Agreement,  the Company  shall,  as  expeditiously  as possible (but in any
event, within 120 days after a Demand  Registration  Request in the case of
Section 2.4(a)):

          (a) prepare and file with the Commission a registration statement
on an appropriate  registration  form of the Commission for the disposition
of such  Registrable  Securities in accordance  with the intended method of
disposition thereof, which form shall, in the case of a shelf registration,
be  available  for the sale of the  Registrable  Securities  by the Holders
thereof and such registration  statement shall comply with the requirements
of the applicable form and include all financial statements required by the
Commission  to be  filed  therewith,  and the  Company  shall  use its best
efforts to cause such  registration  statement  to become  and,  subject to
Sections  2.1(d) and 2.4(b),  remain  effective  (provided,  however,  that
before filing a  registration  statement or prospectus or any amendments or
supplements  thereto,  or comparable  statements  under securities or "blue
sky" laws of any United  States  jurisdiction,  the Company will furnish to
counsel (in the case of a registration pursuant to Section 2.1, selected by
the Investor,  and, in the case of a registration  pursuant to Section 2.2,
the Holder that, together with its Affiliates,  includes the largest number
of Registrable  Securities in such  registration  (the "Major Holder")) for
the Holders of Registrable Securities participating in the planned offering
and the underwriters,  if any, copies of all such documents  proposed to be
filed (including all exhibits thereto),  which documents will be subject to
the review and comment of such counsel, provided that the Company shall not
be  required  to  include  any such  comment  to which  the  Company  shall
reasonably object);

          (b)  prepare and file with the  Commission  such  amendments  and
supplements  to such  registration  statement  and the  prospectus  used in
connection  therewith  as  may  be  necessary  to  keep  such  registration
statement  effective for such period (which shall not be required to exceed
120 days in the case of a  registration  pursuant to Section 2.1 or 90 days
in the case of a registration  pursuant to Section 2.2 and shall  terminate
when all Registrable Securities covered by such registration statement have
been  sold  pursuant  to such  registration  statement)  as any  seller  of
Registrable   Securities  pursuant  to  such  registration   statement  may
reasonably  request and to comply with the provisions of the Securities Act
with respect to the sale or other disposition of all Registrable Securities
covered by such  registration  statement  in  accordance  with the intended
methods of disposition  by the seller or sellers  thereof set forth in such
registration statement;

          (c) furnish,  without charge,  to each seller of such Registrable
Securities and each underwriter,  if any, of the securities covered by such
registration   statement  such  number  of  copies  of  such   registration
statement,  each amendment and  supplement  thereto (in each case including
all exhibits),  and the prospectus included in such registration  statement
(including each preliminary prospectus) in conformity with the requirements
of the Securities Act and other  documents,  as such seller and underwriter
may  reasonably  request in order to  facilitate  the public  sale or other
disposition of the Registrable Securities owned by such seller (the Company
hereby consenting to the use in accordance with all applicable laws of each
such  registration  statement  (or  amendment or  post-effective  amendment
thereto) and each such prospectus (or preliminary  prospectus or supplement
thereto)  by  each  such   seller  of   Registrable   Securities   and  the
underwriters,  if any,  in  connection  with the  offering  and sale of the
Registrable   Securities   covered  by  such   registration   statement  or
prospectus);

          (d) use its best  efforts to register or qualify the  Registrable
Securities  covered  by  such  registration   statement  under  such  other
securities  or "blue  sky" laws of such  jurisdictions  within  the  United
States  as  any  sellers  of   Registrable   Securities   or  any  managing
underwriter,  if any, shall  reasonably  request,  and do any and all other
acts and things  which may be  reasonably  necessary or advisable to enable
such sellers or  underwriter,  if any, to consummate the disposition of the
Registrable Securities in such jurisdictions, except that in no event shall
the Company be required to qualify to do business as a foreign  corporation
in any  jurisdiction  where it would not, but for the  requirements of this
paragraph  (d),  be  required  to be so  qualified,  to  subject  itself to
taxation  in any such  jurisdiction  or to consent  to  general  service of
process in any such jurisdiction;

          (e) promptly notify each seller of Registrable Securities covered
by such registration  statement and each managing underwriter,  if any: (i)
when  the  registration  statement,   any  pre-effective   amendment,   the
prospectus or any prospectus  supplement  related thereto or post-effective
amendment to the registration statement has been filed and, with respect to
the registration statement or any post-effective  amendment,  when the same
has become  effective,  (ii) of any request by the Commission or any United
States state  securities  authority for  amendments or  supplements  to the
registration  statement or the prospectus related thereto or for additional
information,  (iii) of the  issuance  by the  Commission  of any stop order
suspending  the   effectiveness  of  the  registration   statement  or  the
initiation of any proceedings for that purpose,  (iv) of the receipt by the
Company  of  any  notification  with  respect  to  the  suspension  of  the
qualification  of any Registrable  Securities for sale under the securities
or "blue sky" laws of any  jurisdiction or the initiation of any proceeding
for such  purpose,  (v) of the  existence  of any fact of which the Company
becomes aware which results in the registration  statement,  the prospectus
related  thereto  or  any  document   incorporated   therein  by  reference
containing  an untrue  statement of a material  fact or omitting to state a
material  fact  required  to be stated  therein  or  necessary  to make any
statement   therein   not   misleading,   and  (vi)  if  at  any  time  the
representations and warranties  contemplated by any underwriting agreement,
securities  sales  agreement,  or other similar  agreement  relating to the
offering shall cease to be true and correct in all material respects;  and,
if the  notification  relates  to an event  described  in clause  (v),  the
Company  shall  promptly  prepare  and furnish to each such seller and each
underwriter,  if  any,  a  reasonable  number  of  copies  of a  prospectus
supplemented or amended so that, as thereafter  delivered to the purchasers
of such Registrable Securities, such prospectus shall not include an untrue
statement of a material  fact or omit to state a material  fact required to
be  stated  therein  or  necessary  to  make  the  statements  therein  not
misleading;

          (f)  comply  with all  applicable  rules and  regulations  of the
Commission,  and make generally  available to its security holders, as soon
as  reasonably  practicable  after the effective  date of the  registration
statement  (and in any  event  within 15 months  thereafter),  an  earnings
statement  (which  need not be  audited)  covering  the  period of at least
twelve  consecutive  months  beginning  with the first day of the Company's
first  calendar  quarter  after  the  effective  date  of the  registration
statement, which earnings statement shall satisfy the provisions of Section
11(a) of the Securities Act and Rule 158 thereunder;

          (g) if requested by any Holder, to cause any Ordinary Shares held
by such Holder to be deposited at its expense  with the  Depositary  or any
substitute  Depositary  reasonably  satisfactory to such Holder in exchange
for ADSs evidenced by ADRs, in order to permit the registration and sale of
such ADRs in accordance with the terms and conditions hereof;

          (h) (i) cause all such  Registrable  Securities  covered  by such
registration  statement  to be  listed  on the  principal  U.S.  securities
exchange on which similar  securities issued by the Company are then listed
(if any), if the listing of such  Registrable  Securities is then permitted
under the rules of such exchange, or (ii) if no similar securities are then
so listed,  cause all such Registrable  Securities to be listed on a United
States  national  securities  exchange or secure  designation  of each such
Registrable  Security as a Nasdaq National Market  "national  market system
security"  within the meaning of Rule 11Aa2-1 of the  Commission  or secure
National    Association   of   Securities   Dealers   Automated   Quotation
authorization  for such stock and,  without  limiting the generality of the
foregoing,  take all  actions  that may be  required  by the Company as the
issuer of such Registrable  Securities in order to facilitate the arranging
for the  registration of at least two market makers as such with respect to
such stock with the NASD;

          (i)  provide  and  cause  to  be  maintained  a  transfer  agent,
registrar and depositary agent for all such Registrable  Securities covered
by such  registration  statement not later than the effective  date of such
registration statement;

          (j)  enter  into  such  customary   agreements   (including,   if
applicable,  an underwriting  agreement) and take such other actions as the
Major  Holder  (or  the  Holders  in  the  case  of a  Section  2.1  Demand
Registration)  shall reasonably  request in order to expedite or facilitate
the disposition of such Registrable Securities;

          (k)  obtain an opinion  from the  Company's  counsel  and a "cold
comfort"  letter  from the  Company's  independent  public  accountants  in
customary form and covering such matters as are customarily covered by such
opinions  and  "cold  comfort"   letters   delivered  to   underwriters  in
underwritten public offerings, which opinion and letter shall be reasonably
satisfactory  to  the  underwriter,  if  any,  and  to  the  Major  Holders
participating in such offering, and furnish to each Holder participating in
the  offering and to each  underwriter,  if any, a copy of such opinion and
letter addressed to such Holder or underwriter;

          (l) deliver promptly to each Holder participating in the offering
and each  underwriter,  if any,  copies of all  correspondence  between the
Commission  and the  Company,  its  counsel or auditors  and all  memoranda
relating to discussions  with the Commission,  its staff,  other than those
portions of any such correspondence and memoranda which contain information
subject to attorney-client privilege with respect to the Company, and, upon
receipt of such  confidentiality  agreements as the Company may  reasonably
request,  make  reasonably  available for  inspection by any seller of such
Registrable  Securities  covered  by such  registration  statement,  by any
underwriter,  if  any,  participating  in any  disposition  to be  effected
pursuant to such registration statement and by any attorney,  accountant or
other  agent  retained  by any such  seller  or any such  underwriter,  all
pertinent  financial and other records,  pertinent  corporate documents and
properties  of the  Company,  and  cause  all of  the  Company's  officers,
directors and employees to supply all information  reasonably  requested by
any such seller, underwriter,  attorney,  accountant or agent in connection
with such registration statement;

          (m) use its best  efforts to obtain the  withdrawal  of any order
suspending the effectiveness of the registration statement;

          (n) provide a CUSIP number for all  Registrable  Securities,  not
later than the effective date of the registration statement;

          (o) make  reasonably  available  its  employees and personnel and
otherwise  provide  reasonable   assistance  to  the  underwriters  in  the
marketing of Registrable Securities in any underwritten offering;

          (p) promptly  prior to the filing of any document  which is to be
incorporated by reference into the registration statement or the prospectus
(after the initial filing of such registration statement) provide copies of
such document to counsel to the sellers of  Registrable  Securities  and to
the managing  underwriter,  if any, and make the Company's  representatives
reasonably  available for discussion of such document and make such changes
in such document  concerning  such sellers  prior to the filing  thereof as
counsel for such sellers or underwriters may reasonably request;

          (q) furnish to each Holder  participating in the offering and the
managing  underwriter,  without  charge,  at least one  signed  copy of the
registration statement and any post-effective amendments thereto, including
financial statements and schedules,  all documents  incorporated therein by
reference and all exhibits (including those incorporated by reference);

          (r) cooperate with the sellers of Registrable  Securities and the
managing  underwriter,  if any, to facilitate  the timely  preparation  and
delivery of certificates not bearing any restrictive  legends  representing
the  Registrable   Securities  to  be  sold,  and  cause  such  Registrable
Securities to be issued in such  denominations and registered in such names
in  accordance  with  the  underwriting  agreement  prior  to any  sale  of
Registrable  Securities  to the  underwriters  or,  if not an  underwritten
offering, in accordance with the instructions of the sellers of Registrable
Securities at least three  business  days prior to any sale of  Registrable
Securities; and

          (s) take all such other  commercially  reasonable  actions as are
necessary or advisable in order to expedite or facilitate  the  disposition
of such Registrable Securities.

          The Company may require as a condition precedent to the Company's
obligations  under  this  Section  2.4  that  each  seller  of  Registrable
Securities  as to which any  registration  is being  effected  furnish  the
Company such information regarding such seller and the distribution of such
securities  as the  Company  may  from  time  to time  reasonably  request,
provided that such  information  shall be used only in connection with such
registration.

          Each Holder of Registrable Securities agrees that upon receipt of
any  notice  from the  Company  of the  happening  of any event of the kind
described in clause  (iii),  (iv) or (v) of  paragraph  (e) of this Section
2.4, such Holder will discontinue such Holder's  disposition of Registrable
Securities pursuant to the registration statement covering such Registrable
Securities until such Holder's receipt of the copies of the supplemented or
amended  prospectus  contemplated by paragraph (e) of this Section 2.4 and,
if so  directed  by the  Company,  will  deliver  to the  Company  (at  the
Company's  expense) all copies,  other than permanent file copies,  then in
such  Holder's  possession  of the  prospectus  covering  such  Registrable
Securities that was in effect at the time of receipt of such notice. In the
event  the  Company  shall  give any such  notice,  the  applicable  period
mentioned  in  paragraph  (b) of this  Section 2.4 shall be extended by the
number of days during such period from and including the date of the giving
of  such  notice  to  and  including  the  date  when  each  seller  of any
Registrable  Securities  covered by such registration  statement shall have
received the copies of the supplemented or amended prospectus  contemplated
by paragraph (e) of this Section 2.4.

     2.5  Registration Expenses
          ---------------------

          (a) "Expenses" shall mean any and all fees and expenses  incident
to  the  Company's  performance  of or  compliance  with  this  Article  2,
including, without limitation: (i) Commission, United States stock exchange
or NASD  registration  and filing fees and all  listing  fees and fees with
respect to the inclusion of securities in the Nasdaq National Market;  (ii)
fees and expenses of compliance with securities laws or United States "blue
sky" laws and in connection  with the  preparation  of a "blue sky" survey,
including, without limitation, fees and expenses of blue sky counsel; (iii)
printing and copying expenses;  (iv) messenger and delivery  expenses;  (v)
expenses  incurred  in  connection  with  any  road  show;  (vi)  fees  and
disbursements  of  counsel  for the  Company;  (vii)  with  respect to each
registration,  the reasonable fees and  disbursements of one counsel in the
United States,  as required,  for the sellers of Registrable  Securities as
well as of local counsel in France  (selected by the Holders in the case of
a registration pursuant to Section 2.1, and selected by the Major Holder in
the case of a  registration  pursuant  to  Section  2.2);  (viii)  fees and
disbursements of all independent public accountants (including the expenses
of any audit and/or "cold  comfort"  letter) and fees and expenses of other
persons,  including  special experts,  retained by the Company and (ix) any
other  reasonable  fees  and   disbursements   of  underwriters,   if  any,
customarily paid by issuers.

          (b) The Company shall pay all Expenses with respect to any Demand
Registration   pursuant   to  Section   2.1  whether  or  not  such  Demand
Registration  becomes effective or does not remain effective for the period
contemplated  by Section  2.4(b),  provided that the  Holder(s)  making any
Demand  Registration  Request  shall be  responsible  for all Expenses with
respect to any Demand  Registrtion  in which such  Holder(s)  has withdrawn
such Demand  Registration  Request.  The Company  shall pay all Expenses of
each Holder with respect to any  registration  effected  under Section 2.2.
Each holder of  Registrable  Securities  (other than the Holders) shall pay
the  expenses  incurred  by that holder  with  respect to any  registration
effected pursuant to Section 2.2.

          (c)  Notwithstanding  the  foregoing,  (i) the provisions of this
Section 2.5 shall be deemed amended to the extent  necessary to cause these
expense  provisions  to comply with United  States  "blue sky" laws of each
state  or the  securities  laws of any  other  jurisdiction  in  which  the
offering is made and (ii) in connection  with any  registration  hereunder,
each  Holder  of  Registrable  Securities  being  registered  shall pay all
underwriting  discounts and  commissions  and any transfer  taxes,  if any,
attributable  to the  Registrable  Securities,  pro rata  with  respect  to
payments of discounts  and  commissions  in  accordance  with the number of
shares included in the offering by such Holder, and (iii) the Company shall
be  responsible  for  all  of its  internal  expenses  (including,  without
limitation,  all  salaries  and  expenses  of its  officers  and  employees
performing legal or accounting duties).

     2.6  Certain Limitations on Registration Rights
          ------------------------------------------

In  the  case  of  any  registration  under  Section  2.1  pursuant  to  an
underwritten  offering,  or in the case of a registration under Section 2.2
if the Company has  determined to enter into an  underwriting  agreement in
connection  therewith,  all securities to be included in such  registration
shall be subject to an underwriting agreement and no Person may participate
in such  registration  unless  such  Person  agrees to sell  such  Person's
securities on the basis provided  therein and completes and/or executes all
questionnaires  and other  documents  which must be executed in  connection
therewith,  and  provides  such  other  information  to the  Company or the
underwriter as may be necessary to register such Person's securities.

     2.7  Limitations on Sale or Distribution of Other Securities
          -------------------------------------------------------

          (a) If requested in writing by the  managing  underwriter(s),  if
any, of any  registration  effected  pursuant  to Section 2.1 or 2.2,  each
Holder agrees, and if requested will confirm such agreement in writing, not
to effect any public sale or distribution,  including,  without limitation,
any sale pursuant to Rule 144 under the Securities  Act, of any Registrable
Securities,  or of any  other  equity  security  of the  Company  or of any
security  convertible  into or  exchangeable  or exercisable for any equity
security of the Company  (other  than as part of such  underwritten  public
offering)  during the ten day period prior to, and during the 90 day period
beginning on, the closing date of each such underwritten offering.

          (b) The Company hereby agrees, and if requested will confirm such
agreement in writing,  that,  if (i) it shall  previously  have  received a
request  for  registration  pursuant  to  Section  2.1 or 2.2,  and if such
previous registration shall not have been withdrawn or abandoned,  and (ii)
the managing underwriter(s),  if any, of such registration has requested in
writing,  then the Company shall not sell,  transfer,  or otherwise dispose
of,  any  Ordinary  Shares or ADSs,  or any other  equity  security  of the
Company or any security convertible into or exchangeable or exercisable for
any equity security of the Company (other than as part of such underwritten
public offering,  or upon the conversion,  exchange or exercise of any then
outstanding Ordinary Share Equivalent), during the ten-day period prior to,
and  during the  90-day  period  beginning  on,  the  closing  date of such
previous registration; and the Company shall so provide in any registration
rights  agreements  hereafter  entered  into  with  respect  to  any of its
securities.

     2.8  No Required Sale
          ----------------

Nothing  in this  Agreement  shall  be  deemed  to  create  an  independent
obligation  on the part of any  Holder to sell any  Registrable  Securities
pursuant to any effective registration statement.

     2.9  Indemnification for Registrations.
          ---------------------------------

          (a) In the event of any  registration  of any  securities  of the
Company  under the  Securities  Act pursuant to this Article 2, the Company
shall, and hereby does, indemnify and hold harmless,  to the fullest extent
permitted by law, the seller of any Registrable Securities,  its directors,
officers,  fiduciaries,  employees and  stockholders or general and limited
partners (and the directors, officers, employees and stockholders thereof),
each  other  Person  who  participates  as an  underwriter  or a  Qualified
Independent  Underwriter,   if  any,  in  the  offering  or  sale  of  such
securities,  each officer,  director,  employee,  stockholder or partner of
such  underwriter  or  Qualified  Independent  Underwriter,  and each other
Person, if any, who controls such seller or any such underwriter within the
meaning of the Securities Act, against any and all losses,  claims, damages
or liabilities, joint or several, actions or proceedings (whether commenced
or threatened) in respect  thereof and expenses  (including fees of counsel
and any amounts paid in any settlement  effected with the Company's consent
) to which  each  such  indemnified  party  may  become  subject  under the
Securities Act or otherwise ("Claims"), insofar as such Claims arise out of
or are based upon (i) any untrue statement or alleged untrue statement of a
material  fact  contained in any  registration  statement  under which such
securities  were  registered  under the  Securities  Act or the omission or
alleged  omission to state  therein a material  fact  required to be stated
therein or necessary to make the statements  therein not  misleading,  (ii)
any  untrue  statement  or alleged  untrue  statement  of a  material  fact
contained in any preliminary,  final or summary prospectus or any amendment
or  supplement  thereto,   together  with  the  documents  incorporated  by
reference  therein,  or the omission or alleged omission to state therein a
material fact  required to be stated  therein or necessary in order to make
the statements  therein, in the light of the circumstances under which they
were made,  not  misleading,  or (iii) any  violation by the Company of any
federal,  state, or common law rule or regulation applicable to the Company
and  relating to action  required or inaction of the Company in  connection
with  any  such  registration,  and the  Company  will  reimburse  any such
indemnified  party for any legal or other expenses  reasonably  incurred by
such  indemnified  party in connection with  investigating or defending any
such Claim as such  expenses  are  incurred;  provided,  however,  that the
Company shall not be liable to any such indemnified  party in any such case
to the extent  such Claim  arises  solely  out of any untrue  statement  or
alleged untrue statement of a material fact or omission or alleged omission
of a material fact made in such registration statement or amendment thereof
or supplement  thereto or in any such prospectus or any preliminary,  final
or summary  prospectus in reliance  upon, and in conformity  with,  written
information  furnished to the Company by, or on behalf of, such indemnified
party  specifically  for use therein.  Such indemnity and  reimbursement of
expenses  shall  remain  in  full  force  and  effect   regardless  of  any
investigation  made by, or on behalf of, such  indemnified  party and shall
survive the transfer of such securities by such seller.

          (b) Each Holder of  Registrable  Securities  that are included in
the  securities  as to which any  registration  under Section 2.1 or 2.2 is
being effected (and, if required by the Company as a condition to including
any  Registrable   Securities  in  any  registration   statement  filed  in
accordance  with Section 2.1 or Section 2.2, any  underwriter  or Qualified
Independent  Underwriter,  if  any),  shall,  severally  and  not  jointly,
indemnify  and hold  harmless (in the same manner and to the same extent as
set forth in paragraph (a) of this Section 2.9) to the extent  permitted by
law, the Company,  its  officers,  directors,  fiduciaries,  employees  and
stockholders or general and limited partners (and the directors,  officers,
employees,  and stockholders thereof),  each Person controlling the Company
within  the  meaning  of the  Securities  Act with  respect  to any  untrue
statement or alleged untrue  statement of any material fact in, or omission
or alleged omission of any material fact from, such registration statement,
any preliminary,  final or summary  prospectus  contained  therein,  or any
amendment or supplement  thereto, if such statement or alleged statement or
omission or alleged  omission was made in reliance  upon, and in conformity
with, written  information  furnished to the Company or its representatives
by, or on behalf of, such Holder or  underwriter  or Qualified  Independent
Underwriter,  if any, specifically for use therein and shall reimburse such
indemnified  party for any legal or other expenses  reasonably  incurred in
connection with  investigating or defending any such Claim as such expenses
are incurred;  provided,  however, that the aggregate amount which any such
Holder  shall be  required  to pay  pursuant  to this  Section  2.9(b)  and
Sections  2.9(c) and (e) shall in no case be greater than the amount of the
net  proceeds  received  by such  Holder  upon the sale of the  Registrable
Securities  pursuant  to the  registration  statement  giving  rise to such
Claim.  Such indemnity and  reimbursement  of expenses shall remain in full
force and effect regardless of any investigation  made by, or on behalf of,
such indemnified party and shall survive the transfer of such securities by
such Holder.

          (c)  Indemnification  similar to that  specified in the preceding
paragraph (a) and (b) of this Section 2.9 (with appropriate  modifications)
shall be given by the Company with respect to any required  registration or
other qualification of securities under any state securities and "blue sky"
laws.

          (d) Any person entitled to  indemnification  under this Agreement
shall promptly notify the indemnifying party in writing of the commencement
of  any  action  or   proceeding   with   respect  to  which  a  claim  for
indemnification  may be made  pursuant to this Section 2.9, but the failure
of any  indemnified  party to provide  such  notice  shall not  relieve the
indemnifying  party of its  obligations  under the preceding  paragraphs of
this Section 2.9, except to the extent the indemnifying party is materially
prejudiced  thereby and shall not relieve the  indemnifying  party from any
liability which it may have to any  indemnified  party otherwise than under
this  Article 2. In case any  action or  proceeding  is brought  against an
indemnified   party,  it  shall  notify  the  indemnifying   party  of  the
commencement   thereof,   the  indemnifying  party  shall  be  entitled  to
participate  therein  and,  unless in the  reasonable  opinion  of  outside
counsel  to the  indemnified  party a conflict  of  interest  between  such
indemnified and indemnifying parties may exist in respect of such Claim, to
assume  the  defense  thereof  jointly  with any other  indemnifying  party
similarly notified,  to the extent that it chooses, with counsel reasonably
satisfactory  to  such  indemnified   party,  and  after  notice  from  the
indemnifying  party  to such  indemnified  party  that it so  chooses,  the
indemnifying  party shall not be liable to such  indemnified  party for any
legal or other expenses  subsequently incurred by such indemnified party in
connection  with  the  defense  thereof  other  than  reasonable  costs  of
investigation;  provided, however, that (i) if the indemnifying party fails
to take  reasonable  steps  necessary  to defend  diligently  the action or
proceeding  within 20 days after  receiving  notice  from such  indemnified
party that the  indemnified  party believes it has failed to do so, (ii) if
such indemnified party who is a defendant in any action or proceeding which
is also  brought  against  the  indemnifying  party  reasonably  shall have
concluded  that there may be one or more legal  defenses  available to such
indemnified  party which are not  available to the  indemnifying  party and
that would cause  representation  by the same  counsel to be  inappropriate
under   applicable   standards  of  professional   conduct,   or  (iii)  if
representation   of  both   parties  by  the  same   counsel  is  otherwise
inappropriate under applicable standards of professional conduct,  then, in
any such  case,  the  indemnified  party  shall have the right to assume or
continue its own defense as set forth above (but with no more than one firm
of counsel for all indemnified parties in each jurisdiction,  except to the
extent any  indemnified  party or parties  reasonably  shall have concluded
that there may be legal  defenses  available to such party or parties which
are not  available  to the other  indemnified  parties and that would cause
representation  by the same counsel to be  inappropriate  under  applicable
standards of professional  conduct or to the extent  representation  of all
indemnified  parties by the same counsel is otherwise  inappropriate  under
applicable  standards of professional  conduct) and the indemnifying  party
shall be liable for any expenses therefor  (including,  without limitation,
any such counsel's fees). No indemnifying party shall,  without the written
consent of the indemnified  party,  effect the settlement or compromise of,
or consent to the entry of any  judgment  with  respect  to, any pending or
threatened  action  or  Claim  in  respect  of  which   indemnification  or
contribution may be sought hereunder  (whether or not the indemnified party
is an actual or  potential  party to such  action  or  claim)  unless  such
settlement, compromise or judgment (A) includes an unconditional release of
the  indemnified  party from all  liability  arising  out of such action or
claim and (B) does not  include a  statement  as to,  or an  admission  of,
fault,  culpability  or a  failure  to  act,  by,  or  on  behalf  of,  any
indemnified party. No indemnifying party shall be liable for any settlement
or compromise  of, or consent to the entry of any judgment with respect to,
any pending or threatened  action or Claim entered into by any  indemnified
party without such  indemnifying  party's prior written  consent during any
period in which the  indemnifying  party is not in  material  breach of its
obligations under this Section 2.9.

          (e) If for any reason the foregoing  indemnity is  unavailable or
is  insufficient  to hold  harmless an  indemnified  party  under  Sections
2.9(a),  (b) or (c), then each  indemnifying  party shall contribute to the
amount paid or payable by such  indemnified  party as a result of any Claim
in such  proportion as is  appropriate to reflect the relative fault of the
indemnifying  party,  on the one hand, and the  indemnified  party,  on the
other hand, with respect to such offering of securities. The relative fault
shall be determined by reference to, among other things, whether the untrue
or alleged  untrue  statement of a material fact or the omission or alleged
omission to state a material  fact relates to  information  supplied by the
indemnifying  party or the  indemnified  party  and the  parties'  relative
intent,  knowledge,  access to  information  and  opportunity to correct or
prevent such untrue  statement or omission.  If,  however,  the  allocation
provided in the second  preceding  sentence is not  permitted by applicable
law, then each  indemnifying  party shall  contribute to the amount paid or
payable by such  indemnified  party in such proportion as is appropriate to
reflect not only such relative  faults,  but also the relative  benefits of
the  indemnifying  party and the  indemnified  party,  as well as any other
relevant equitable  considerations.  The parties hereto agree that it would
not be just and equitable if contributions  pursuant to this Section 2.9(e)
were to be  determined  by pro rata  allocation  or by any other  method of
allocation  which does not take into account the  equitable  considerations
referred to in the preceding  sentences of this Section 2.9(e).  The amount
paid or  payable in  respect  of any Claim  shall be deemed to include  any
legal or other expenses  reasonably  incurred by such indemnified  party in
connection with investigating or defending any such Claim. No person guilty
of fraudulent misrepresentation (within the meaning of Section 11(f) of the
Securities Act) shall be entitled to  contribution  from any person who was
not guilty of such fraudulent  misrepresentation.  Notwithstanding anything
in this Section 2.9(e) to the contrary,  no indemnifying  party (other than
the  Company)  shall  be  required  pursuant  to  this  Section  2.9(e)  to
contribute  any  amount  in  excess of the net  proceeds  received  by such
indemnifying party from the sale of Registrable  Securities in the offering
to which the losses,  claims,  damages or  liabilities  of the  indemnified
parties  relate,  less  the  amount  of any  indemnification  payment  made
pursuant to Sections 2.9(b) and (c).

          (f)  The  indemnity  agreements  contained  herein  shall  be  in
addition to any other rights to  indemnification  or contribution which any
indemnified  party may have  pursuant to law or contract  and shall  remain
operative and in full force and effect regardless of any investigation made
or omitted by, or on behalf of, any indemnified party and shall survive the
transfer of the Registrable Securities by any such party.

          (g) The indemnification and contribution required by this Section
2.9 shall be made by  periodic  payments of the amount  thereof  during the
course of the  investigation or defense,  as and when bills are received or
expense, loss, damage or liability is incurred.

3.   Underwritten Offerings
     ----------------------

     3.1  Requested Underwritten Offerings
          --------------------------------

If  requested  by the  underwriters  for any  underwritten  offering by the
Holders pursuant to a registration requested under Section 2.1, the Company
shall enter into a customary  underwriting agreement with the underwriters.
Such underwriting  agreement shall be satisfactory in form and substance to
the Holders  acting  reasonably  and in such  underwriting  agreement,  the
Company  shall,  make  to,  and  for  the  benefit  of,  such  Holders  the
representations,  warranties  and  covenants of the Company which are being
made to, and for the  benefit of,  such  underwriters  and which are of the
type  customarily   provided  to   institutional   investors  in  secondary
offerings.  Any Holder  participating  in the offering  shall be a party to
such underwriting agreement and may, at its option, require that any or all
of the  representations and warranties made by, and the other agreements on
the part of, the Company  to, and for the  benefit  of,  such  underwriters
shall also be made to, and for the  benefit of, such Holder and that any or
all of the conditions  precedent to the  obligations  of such  underwriters
under  such   underwriting   agreement  be  conditions   precedent  to  the
obligations of such Holder;  provided,  however, that the Company shall not
be required  to make any  representations  or  warranties  with  respect to
information  specifically  provided  by a  selling  Holder  of  Registrable
Securities for inclusion in the registration  statement.  Such underwriting
agreement  shall also contain such  representations  and  warranties by the
participating Holders as are customary in agreements of that type.

     3.2  Piggyback Underwritten Offerings
          --------------------------------

In the case of a  registration  pursuant  to  Section  2.2  hereof,  if the
Company shall have determined to enter into any underwriting  agreements in
connection  therewith,  all of the Holders'  Registrable  Securities  to be
included  in such  registration  shall  be  subject  to  such  underwriting
agreements.  Any Holder  participating  in such  registration  may,  at its
option,  require that any or all of the  representations and warranties by,
and the  other  agreements  on the part of,  the  Company  to,  and for the
benefit  of, such  underwriters  shall also be made to, and for the benefit
of,  such  Holder and that any or all of the  conditions  precedent  to the
obligations  of such  underwriters  under such  underwriting  agreement  be
conditions  precedent to the obligations of such Holder.  Such underwriting
agreement  shall also contain such  representations  and  warranties by the
participating Holders as are customary in agreements of that type.

     3.3  Underwriting Services
          ---------------------

If a Demand  Registration  pursuant to Section 2.1 involves an underwritten
offering,  then the Company shall select the underwriter from  underwriting
firms of national reputation in the United States,  subject to the approval
of the Holders, such approval not to be unreasonably withheld.

4.   General
     -------

     4.1  Rule 144
          --------

The  Company  covenants  that  (a) so long  as it  remains  subject  to the
reporting  provisions  of the Exchange Act, it will timely file the reports
required to be filed by it under the  Securities  Act or the  Exchange  Act
(including,  without limitation, the reports under Sections 13 and 15(d) of
the Exchange Act referred to in  subparagraph  (c)(1) of Rule 144 under the
Securities  Act),  and (b) will take such  further  action as any Holder of
Registrable  Securities may reasonably request,  all to the extent required
from time to time to enable  such  Holder  to sell  Registrable  Securities
without registration under the U.S. Securities Act within the limitation of
the exemptions  provided by (i) Rule 144 under the Securities  Act, as such
Rule  may be  amended  from  time to  time,  or (ii)  any  similar  rule or
regulation  hereafter  adopted by the  Commission.  Upon the request of any
Holder of Registrable Securities, the Company will deliver to such Holder a
written statement as to whether it has complied with such requirements.

     4.2  Nominees for Beneficial Owners
          ------------------------------

If Registrable  Securities  are held by a nominee for the beneficial  owner
thereof, the beneficial owner thereof may, at its option, be treated as the
Holder of such Registrable  Securities for purposes of any request or other
action by any Holder or Holders of Registrable  Securities pursuant to this
Agreement  (or any  determination  of any  number or  percentage  of shares
constituting  Registrable  Securities  held by any  Holder  or  Holders  of
Registrable Securities contemplated by this Agreement);  provided, however,
that  the  Company  shall  have  received  written  assurances   reasonably
satisfactory to it of such beneficial ownership.

     4.3  Amendments
          ----------

The terms and provisions of this  Agreement may be modified or amended,  or
any of the provisions hereof waived,  temporarily or permanently,  pursuant
to the prior written consent of the Company and the Holders of at least 50%
of Registrable Securities

     4.4  Notices
          -------

All notices,  requests,  consents and other communications hereunder to any
party shall be deemed to be sufficient if contained in a written instrument
delivered in person or sent by telecopy, or nationally recognized overnight
courier, postage prepaid,  addressed to such party at the address set forth
below or such other  address as may  hereafter be  designated in writing by
such party to the other parties:

     (i)  if to the Company, to:

Compangie Generale De Geophysique
1 rue Leon Migaux
91341 Massy Sedex
France
Telecopy:   011 331 64 47 39 70
Attention:  Michel Ponthus

with a copy to:

Jones, Day, Reavis & Pogue
599 Lexington Avenue
New York, New York 10022
Attention:  Jere R. Thomson

     (ii) if to the Investor, to:

The Beacon Group Energy Investment Fund II, L.P.
399 Park Avenue
New York, New York 10022
Telecopy:  (212) 339-9109
Attention:  Robert F. Semmens

with a copy to:

Fried, Frank, Harris, Shriver & Jacobson
One New York Plaza
New York, NY 10004
Telecopy:  (212) 859-8587
Attention:  Charles M. Nathan

          Each Holder, by written notice given to the Company in accordance
with this Section 4.5, may change the address to which such notice or other
communications are to be sent to such Holder.  Holders who acquire Ordinary
Shares or ADSs after the date hereof shall give the Company notice of their
address in accordance  with this Section 4.5. All such  notices,  requests,
consents and other  communications  shall be deemed to have been given when
received.

     4.6  Miscellaneous
          -------------

          (a) This Agreement shall be binding upon and inure to the benefit
of and be enforceable by the parties hereto and the respective  successors,
personal  representatives  and  assigns of the parties  hereto,  whether so
expressed  or not. No Person  other than a Holder  shall be entitled to any
benefits  under this  Agreement,  except as  otherwise  expressly  provided
herein.  This  Agreement  and the rights of the  parties  hereunder  may be
assigned  by any of the parties  hereto to any  transferee  of  Registrable
Securities  provided that upon the  consummation of, and as a condition to,
any such assignment the transferee  assumes the obligations of the assignor
under, and agrees to be bound by the terms of, this Agreement.

          (b) This Agreement and the other  writings  referred to herein or
delivered  pursuant  hereto  which form a part  hereof  contain  the entire
agreement  among the parties with respect to the subject  matter hereof and
supersede all prior and contemplated  arrangements and understandings  with
respect thereto.

          (c)  This  Agreement  shall  be  governed  by  and  construed  in
accordance  with the laws of the State of New York without giving effect to
the principles of conflicts of law thereof.

          (d) The  headings  of the  sections of this  Agreement  have been
inserted for  convenience of reference only and shall not be deemed to be a
part of this Agreement.

          (e) This Agreement may be executed in any number of counterparts,
and each such  counterpart  hereof shall be deemed an original  instrument,
but all such counterparts together shall constitute but one instrument.

          (f) Whenever possible,  each provision of this Agreement shall be
interpreted  in  such  manner  as to be  effective  and  valid,  but if any
provision of this Agreement is held to be invalid or  unenforceable  in any
respect,  such invalidity or  unenforceability  shall not render invalid or
unenforceable any other provision of this Agreement.

          (g)  It is  hereby  agreed  and  acknowledged  that  it  will  be
impossible  to measure in money the  damages  that would be suffered if the
parties fail to comply with any of the  obligations  herein imposed on them
and that in the event of any such  failure,  an  aggrieved  person  will be
irreparably  damaged and will not have an adequate  remedy at law. Any such
person,  therefore,  shall be  entitled  to  injunctive  relief,  including
specific performance,  to enforce such obligations,  without the posting of
any bond,  and, if any action should be brought in equity to enforce any of
the  provisions of this  Agreement,  none of the parties hereto shall raise
the defense that there is an adequate remedy at law.

          (h) Each party  hereto  shall do and  perform or cause to be done
and  performed  all such  further  acts and  things and shall  execute  and
deliver all such other agreements, certificates, instruments, and documents
as any other party hereto  reasonably may request in order to carry out the
intent and accomplish  the purposes of this Agreement and the  consummation
of the transactions contemplated hereby.

          (i)  EACH  OF  THE  PARTIES   HERETO   HEREBY   IRREVOCABLY   AND
UNCONDITIONALLY  CONSENTS TO SUBMIT TO THE  EXCLUSIVE  JURISDICTION  OF THE
COURTS OF THE STATE OF NEW YORK AND OF THE  UNITED  STATES OF  AMERICA,  IN
EACH CASE  LOCATED  IN THE COUNTY OF NEW YORK (AS  APPLICABLE,  A "NEW YORK
COURT"), FOR ANY SUIT, ACTION,  PROCEEDING OR INVESTIGATION IN ANY COURT OR
BEFORE ANY GOVERNMENTAL AUTHORITY ("LITIGATION") ARISING OUT OF OR RELATING
TO  THIS  AGREEMENT  AND  THE  TRANSACTIONS  CONTEMPLATED  HEREBY,  OR  FOR
RECOGNITION OR ENFORCEMENT OF ANY JUDGMENT  RESULTING FROM SUCH  LITIGATION
(AND AGREES NOT TO COMMENCE ANY LITIGATION  RELATING THERETO EXCEPT IN SUCH
COURTS).  The Company has appointed CT Corporation  System, New York NY, as
its authorized  agent,  (the  "Authorized  Agent") to receive on its behalf
service of copies of the summons and complaints and any other process which
may be served in any legal  suit,  action or  proceeding  arising out of or
relating to this Agreement or the  transactions  contemplated  hereby which
may be instituted in a New York Court, and waives any other requirements of
or objections to personal  jurisdiction with respect thereto.  Such service
may be made by  delivering a copy of such process to the Company in care of
the Authorized  Agent at the addresses  specified  above for the Authorized
Agent and obtaining a receipt therefor,  and the Company hereby irrevocably
authorizes and direct such  Authorized  Agent to accept such service on its
behalf.  The Company  represents and warrants that the Authorized Agent has
agreed to act as said agent for service of process, and agrees that service
of process in such  manner  upon the  Authorized  Agent  shall be deemed in
every  respect  effective  service of process  upon the Company in any such
suit, action or proceeding.  The Company further agrees to take any and all
actions as may be necessary to maintain such designation and appointment of
such  Authorized  Agent in full force and effect.  If the Authorized  Agent
shall  cease to act as the  Company's  agent in the  County of New York for
service of process,  the Company shall  appoint  without delay another such
agent.  In the event  that the  Company  shall fail to  designate  such new
designee,  appointee  and agent,  service of process in any such  action or
proceeding  may be  effected  upon the  Company  by the  mailing  of copies
thereof  by  first-class  mail  (postage  prepaid)  to the  Company  at its
addresses set forth herein,  such service to become effective 30 days after
such mailing.  Nothing herein shall affect the right of any party hereto to
serve  process in any other  manner  permitted by law. No party may move to
(i) transfer any Litigation from a New York Court to another  jurisdiction,
(ii)  consolidate  any Litigation  brought in a New York Court with a suit,
action  or  proceeding  in  another  jurisdiction,  or  (iii)  dismiss  any
Litigation brought in a New York Court for the purpose of bringing the same
in another jurisdiction.  Each of the parties hereto hereby irrevocably and
unconditionally  waives  any  objection  to  the  laying  of  venue  of any
Litigation  arising out of this Agreement or the transactions  contemplated
hereby  in  the  New  York  Court,  and  hereby  further   irrevocably  and
unconditionally  waives  and agrees not to plead or claim in any such court
that any such  Litigation  brought in any such court has been brought in an
inconvenient  forum.  EACH OF THE PARTIES  IRREVOCABLY AND  UNCONDITIONALLY
WAIVES,  TO THE FULLEST  EXTENT  PERMITTED BY  APPLICABLE  LAW, ANY AND ALL
RIGHTS TO TRIAL BY JURY IN CONNECTION WITH ANY LITIGATION ARISING OUT OF OR
RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

     4.7  Prior Agreements
          ----------------

Each of the  Holders  and the  Company  hereby  agrees  that any  agreement
previously  entered into by it pursuant to which the Company  granted to it
any registration rights shall be superseded by this Agreement and each such
agreement (and any rights such Holder has pursuant to such agreement) shall
be terminated, null and void and no longer in effect.

     4.8  No Inconsistent Agreements
          --------------------------

Without the prior written consent of the Investor,  neither the Company nor
any Holder  will,  on or after the date of this  Agreement,  enter into any
agreement  with  respect  to  its  securities   which  conflicts  with  the
provisions  hereof,  other than any lock-up agreement with the underwriters
in connection with any registered offering effected hereunder,  pursuant to
which the Company  shall agree not to  register  for sale,  and the Company
shall agree not to sell or otherwise dispose of, Ordinary Shares or ADSs or
any securities convertible into or exercisable or exchangeable for Ordinary
Shares or ADSs, for a specified period  following the registered  offering.
For the avoidance of doubt, this Section 4.8 shall not prohibit the Company
from  granting  demand  registration  rights to other holders of its equity
securities   that  have  priority  over  persons   exercising   "piggyback"
registration rights pursuant to Section 2.2.

     4.9  English Language
          ----------------

This  Agreement  shall be in the  English  language  except as  required by
French law (in which event a certified English translation thereof shall be
provided  by the  Company to each  Holder).  All  documents,  certificates,
reports or notices to be delivered or communications to be given or made by
any party hereto  pursuant to the terms of this  Agreement  shall be in the
English  language  unless  otherwise   expressly  provided  herein  or,  if
originally written in another language, shall be accompanied by an accurate
English  translation  upon which the Holders hereto shall have the right to
rely for all purposes of this Agreement.



<PAGE>



     IN WITNESS WHEREOF, the undersigned have executed this Agreement as of
the date set forth above.


                                   THE BEACON GROUP ENERGY INVESTMENT
                                   FUND II, L.P.



                                   By: /s/ Mary J. Guilfoile
                                      -----------------------------
                                   Name:
                                   Title:




                                   COMPANGIE GENERALE DE GEOPHYSIQUE



                                   By: /s/ Robert Brunk
                                      -----------------------------
                                   Name:  Robert Brunk
                                   Title: Chairman of the Board
                                          and Chief Executive Officer



(Signature Page to Registration
Rights Agreement)




                                 EXHIBIT 3
                         AGREEMENT OF JOINT FILING

The undersigned hereby agree that they are filing jointly pursuant to Rule
13d-1(k)(l) of the Exchange Act the statement dated January __, 1999,
containing the information required by Schedule 13D, for the Ordinary
Shares of Compagnie Generale de Geophysique held by CGG Investors, LLC, a
Delaware limited liability company, and GF Ltd. Transaction Partnership,
L.P.

Dated:  February 4, 2000




                    ENERGY FUND II GP, LLC

                    By: /s/ John J. MacWilliams
                       ----------------------------------------
                       Authorized Signatory*


                    BEACON ENERGY INVESTORS II, LP

                    By:   Energy Fund II GP, LLC

                          By: /s/ John J. MacWilliams
                             -------------------------------------
                             Authorized Signatory*


                    THE BEACON GROUP ENERGY INVESTMENT FUND II, L.P.

                    By:     Beacon Energy Investors II, LP
                            By:      Energy Fund II GP, LLC

                                     By: /s/ John J. MacWilliams
                                        ----------------------------
                                        Authorized Signatory*


                    CGG INVESTORS LLC

                    By:     The Beacon Group Energy Investment Fund II, L.P.
                            By:      Beacon Energy Investors II, LP
                                     By:      Energy Fund II GP, LLC

                                              By: /s/ John J. MacWilliams
                                                 ---------------------------
                                                 Authorized Signatory*


                    GF LTD. TRANSACTION PARTNERSHIP, L.P.

                    By:     Beacon Energy Investors II, LP
                            By:      Energy Fund II GP, LLC

                                     By: /s/ John J. MacWilliams
                                        -----------------------------
                                        Authorized Signatory*



- -----------------------
*  A Power of Attorney authorizing John MacWilliams to act on behalf of Energy
   Fund II GP, LLC is filed herewith as Exhibit 4.

                                 EXHIBIT 4

                             POWER OF ATTORNEY


ENERGY FUND II GP, LLC hereby authorizes any of GEOFFREY T. BOISI, MARY J.
GUILFOILE, JOHN J. MACWILLIAMS OR PRESTON R. MILLER, acting alone, to sign
and file with the Securities and Exchange Commission on its behalf a
Schedule 13D and any amendments thereto relating to its actual and deemed
beneficial ownership of shares of COMPAGNIE GENERALE DE GEOPHYSIQUE. This
Power of Attorney is valid for twelve (12) months from the date set forth
below.


Dated:  February 4, 2000


                                    ENERGY FUND II GP, LLC

                                    By: /s/ Preston R. Miller
                                       ----------------------------------
                                              Authorized Signatory


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