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                                                                     EXHIBIT 3.1

                          CERTIFICATE OF INCORPORATION
                                       OF
                               XPLOR CORPORATION



                                  ARTICLE ONE

         The name of the Corporation is Xplor Corporation.

                                  ARTICLE TWO

         The address of the registered office of the Corporation in the State
of Delaware is Corporation Trust Center, 1209 Orange Street, in the City of
Wilmington, County of New Castle.  The name of its registered agent at that
address is The Corporation Trust Company.

                                 ARTICLE THREE

         The purpose of the Corporation is to engage in any lawful act or
activity for which a corporation may be organized under the General Corporation
Law of the State of Delaware.

                                  ARTICLE FOUR

         The Corporation shall have authority to be exercised by the Board of
Directors, to issue 25,000,000 shares of common voting stock of the par value
of $.01 per share (the "Common Stock") having an aggregate par value of
$250,000 and 10,000,000 shares of preferred stock of the par value of $.01 per
share (the "Preferred Stock") having an aggregate par value of $100,000.
Shares of the Preferred Stock shall be designated as the Board of Directors may
determine and may be issued in series by Board of Directors as hereinafter
provided in paragraph (d) below.  The relative rights and preferences of the
share of capital stock of the Corporation shall be as follows:

                 (a)      Each holder of Common Stock shall at eery meeting of
stockholders of the Corporation be entitled to one vote in person or by proxy
for each share of Common Stock held by such holder and each holder of Preferred
Stock with voting rights shall at every meeting of stockholders of the
Corporation be entitled to one vote in person or by proxy for each share of
Preferred Stock with voting rights held by such holder to the extent of such
rights as specified pursuant to paragraph (c) (vii) below.

                 (b)      Subject to the rights, if any, of the holders of the
Preferred Stock, or any series thereof, the holders of the Common Stock are
entitled to the entire voting power, all dividends declared and paid by the
Corporation and all assets of the corporation in the event of any liquidation,
dissolution, or winding up of the Corporation.
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                 (c)      The Preferred Stock may be divided into and issued
from time to time in one or more series.  All shares of the Preferred Stock
shall be of equal rank and shall be identical, except with respect to the
particulars that may be fixed by the Board of Directors as hereinafter provided
pursuant to authority that is hereby expressly vested in the Board of
Directors; provided, however, that each share of a given series of the
Preferred stock shall be identical in all respects with the other shares of
such series.  Before any shares of the Preferred Stock of any particular series
shall be issued, the Board of Directors shall fix and determine, in the manner
provided by law, the following particulars with respect to the share of such
series:

                          (i)     the distinctive designation of such series
                          and the number of share of Preferred Stock that shall
                          constitute such series, which number may be increased
                          (except where otherwise provided by the Board of
                          Directors in creating such series) or decreased (but
                          not below the number of shares of such series then
                          issued) from time to time by the Board of Directors
                          by resolution;

                          (ii)    the dividend or rate of dividend payable with
                          respect to shares of Preferred Stock of such series,
                          the time of payment of any dividend, whether 
                          dividends shall be cumulative and, if so, the 
                          conditions under which and the date from which 
                          dividends shall be accumulated;

                          (iii)   the redemption provisions applicable to the
                          shares of Preferred Stock of such series, if any, and
                          if applicable, the time or times when, the price or
                          prices at which, and the other terms and conditions
                          under which the shares of Preferred Stock of such
                          series shall be redeemable;

                          (iv)    the amount payable on shares of Preferred
                          Stock of such series in the event of any voluntary or
                          involuntary dissolution, liquidation or winding up of
                          the affairs of the Corporation, which shall not be
                          deemed to include the merger or consolidation of the
                          Corporation or a sale, lease or conveyance of all or
                          part of the assets of the Corporation;

                          (v)     the purchase, retirement or sinking fund
                          provisions, if any, for the redemption or purchase of
                          shares of Preferred Stock of such series;

                          (vi)    the rights, if any of the holders of shares
                          of Preferred Stock of such series to convert such
                          shares into or exchange such shares for shares of the
                          Common Stock or shares of any
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                          other series of the Preferred Stock and the terms and
                          conditions of such conversion or exchange;

                          (vii)   subject to paragraph (a) above, the extent of
                          voting rights of the shares of Preferred Stock of
                          such series of the absence thereof; and

                          (viii)  such other terms limitations, rights and
                          preferences, if any, of such series as the Board of
                          Directors may lawfully fix under the laws of the
                          State of Delaware as in effect at the time of certain
                          of such series.

                                  ARTICLE FIVE

         None of the holders of the shares of any class of stock of the
Corporation shall be entitled as matter of right to purchase, subscribe for or
otherwise acquire any new or additional shares of stock of the Corporation of
any class now or hereafter authorized, or any options or warrants to purchase,
subscribe for or otherwise acquire any such new or additional shares, or any
shares, evidences of indebtedness, or any other securities convertible into or
carrying options or warrants to purchase, subscribe for or otherwise acquire
any new or additional shares other than such (if any) as the Board of Directors
may determine from time to time.

                                  ARTICLE SIX

         The number of directors which shall constitute the whole Board of
Directors of the Corporation shall be not less than six (6) nor more than ten
(10) and shall be fixed in the By-Laws of the Corporation from time to time.

                                 ARTICLE SEVEN

         The power to fill vacancies on the Board of Directors (whether by
reason or resignation or otherwise) shall be vested solely in the Board of
Directors and vacancies may be filled by a majority of the directors then in
office, although less than a quorum, unless all directorships are vacant, in
which case the stockholders shall fill the then existing vacancies.

                                 ARTICLE EIGHT

         Special meetings of the stockholders of the Corporation for any
purpose may be called at any time by the Board of Directors, or by a committee
of the Board of Directors which has been duly designated by the Board of
Directors and whose power and authority, as provided in a resolution of the
Board of Directors or in the By-Laws of the Corporation, include the power to
call such meetings, but such special meetings may not be called by any other
person.
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                                  ARTICLE NINE

         In furtherance and not in limitation of the powers conferred by
statute, the Board of Directors is expressly authorized to make, repeal, alter,
amend and rescind the By-Laws of the Corporation, provided that the Board of
Directors may not amend the By-Laws to increase the number of directors above
ten.

                                  ARTICLE TEN

         The election of directors need not be by written ballot unless
required by the By-Laws of the Corporation.  Any director may be removed,
either for or without cause, at any time, by the affirmative vote of the
holders of record of at least two-thirds (2/3) of the outstanding shares of
stock entitled to vote, and the vacancy in the Board caused by any such removal
shall be filed as provided herein; provided, that where the holders of any
class or series are entitled to elect one or more directors the provisions of
this section shall apply in respect of removal without cause of a director or
directors so elected, to the vote of the outstanding share of that class or
series.

                                 ARTICLE ELEVEN

         The Corporation may indemnify, to the fullest extent permitted by the
General Corporation law of the State of Delaware and as provided in the By-laws
of the Corporation, any and all persons whom it shall have the power to
indemnify from and against any and all expenses, liabilities or other matters.

                                 ARTICLE TWELVE

         Whenever a compromise or arrangement is proposed between this
Corporation and its creditors or any class of them and/or between this
Corporation and its stockholders or any class of them, any court of equitable
jurisdiction within the State of Delaware may, on the application in a summary
way of this Corporation or of any creditor or stockholder thereof or on
application of any receiver or receivers appointed for this Corporation under
the provisions of section 291 of Title 8 of the Delaware Code, or on the
application of trustees in dissolution or of any receiver or receivers
appointed for this Corporation under the provisions of section 279 of Title 8
of the Delaware Code, order a meeting of the creditors or class of creditors,
and/or of the stockholders or class of stockholders of this Corporation, as the
case may be, to be summoned in such manner as the said court directs.  If a
majority in number representing three-fourths in value of the creditors or
class of creditors, and/or of the stockholders or class of stockholders of this
Corporation, as the case may be, agree to any compromise or arrangement and to
any reorganization of this Corporation as a consequence of such compromise or
arrangement, said compromise or arrangement and said reorganization shall, if
sanctioned by the court to which the said application has been made, be binding
on all the creditors or class of creditors, and/or on all the stockholders or
class of stockholders, of this Corporation, as the case may be, and also on
this Corporation.
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                                ARTICLE THIRTEEN

         The Corporation reserves the right to amend, alter, change or repeal
any provisions contained in this Certificate of Incorporation, in the manner
now or hereafter prescribed by statute, and all rights conferred on
stockholders herein are granted subject to this reservation.  Notwithstanding
the preceding sentence, the provisions of this Certificate of Incorporation
relating to the power to remove directors or to fill vacancies on the Board and
amendments to the By-laws of the Corporation may not be amended without the
affirmative vote of the holders of two- thirds of the shares entitled to vote
in the election of directors.

                                ARTICLE FOURTEEN

         Meetings of stockholders may be held within or without the State of
Delaware, as the By-Laws may provide.  The books of the Corporation may be kept
(subject to provisions contained in the statutes) outside the State of Delaware
at such place or places as may be designated from time to time by the Board of
Directors or By-Laws.  Election of directors need not be by written ballot
unless the By-Laws of the Corporation so provide.

                                ARTICLE FIFTEEN

         The name and mailing address of the incorporator is Charles A. Mele,
380 Madison Avenue, New York, New York 10017.

         The undersigned, being the sole incorporator hereinbefore name, for
the purpose of forming a corporation pursuant to the General Corporation Law of
the State of Delaware, does make this certificate, hereby declaring and
certifying that this the undersigned's act and deed and the facts herein stated
are true, and accordingly has hereunto set his hand this 20th day of August,
1985.




                                                                              
                                                   ---------------------------
                                                   Charles A. Mele
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                            CERTIFICATE OF AMENDMENT

                                     of the

                          CERTIFICATE OF INCORPORATION

                                       of

                               XPLOR CORPORATION


         Pursuant to Section 242 of the General Corporation Law of the State of
Delaware, the undersigned corporation does hereby certify:

         FIRST:     The Board of Directors of Xplor Corporation (the
"Corporation"), by unanimous written consent in lieu of a meeting, adopted a
resolution setting forth a proposed amendment to the Certificate of
Incorporation of said Corporation, declaring said amendment to be advisable.
The resolution setting forth the proposed amendment is as follows:

                          RESOLVED:           that Article Sixteen be added to
                 the Certificate of Incorporation of the Corporation:

                          ARTICLE SIXTEEN:     A director of this corporation
                 shall not be personally liable to the corporation or its
                 stockholders for monetary damages for breach of fiduciary duty
                 as a director except for liability (i) for any breach of the
                 director's duty of loyalty to the corporation or its
                 stockholders, (ii) for acts or omissions not in good faith or
                 which involved intentional misconduct or a knowing violation
                 of law, (iii) for a stock repurchase which is illegal under
                 Section 174 of the General Corporation Law of the State of
                 Delaware or, (iv) for any transaction from which the director
                 derived an improper personal benefit.

         SECOND: Such amendment was approved by the holders of a majority of
the Corporation's outstanding Common Stock entitled to vote thereon.
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         THIRD:  The aforesaid amendment was duly adopted in accordance with
the applicable provisions of Sections 141 and 242 of the General Corporation
Law of the State of Delaware.

         IN WITNESS WHEREOF, Xplor Corporation has caused its corporate seal to
be hereunto affixed and this certificate to be signed by Andrew Stanhope, its
Vice President, and attested by William C. Kaltnecker, its Secretary, this 4th
day of June, 1987.


                                       XPLOR CORPORATION


                                       By                                   
                                          ----------------------------------
                                          Andrew Stanhope,
                                          Vice President

ATTEST:


- ----------------------------------
William C. Kaltnecker, Secretary


(Corporate Seal)
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            CERTIFICATE OF AMENDMENT OF CERTIFICATE OF INCORPORATION

                                       OF

                               XPLOR CORPORATION


         It is hereby certified that:


         1.      The name of the corporation (hereinafter called the
"Corporation") is Xplor Corporation.

         2.      The Certificate of Incorporation of the Corporation is hereby
amended by striking out the first sentence of Article Fourth thereof and by
substituting in lieu of said sentence the following new sentence:

                 "Article FOURTH:          The Corporation shall have authority
                 to be exercised by the Board of Directors, to issue 5,000,000
                 shares of common voting stock of the par value of $.01 per
                 share (the "Common Stock") having an aggregate par value of
                 $50,000 and 1,000,000 shares of preferred stock of the par
                 value of $.01 per share (the "Preferred Stock") having an
                 aggregate par value of $10,000."

         3.      The amendment of the Certificate of Incorporation herein
certified has been duly adopted in accordance with the provisions of Section
242 of the General Corporation Law of the State of Delaware.

         IN WITNESS WHEREOF, Xplor Corporation has caused its corporate seal to
be hereunto affixed and this certificate to be signed by Andrew Stanhope, its
Vice President, and attested by William C. Kaltnecker, its Secretary, this 8th
day of August, 1990.

                                           XPLOR CORPORATION


                                           By:                              
                                              ------------------------------
                                              Andrew Stanhope,
                                              Vice President
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Attest:


- --------------------------------------
William C. Kaltnecker, Secretary


(Corporate Seal)
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                            CERTIFICATE OF AMENDMENT
                                     TO THE
                          CERTIFICATE OF INCORPORATION

                                       OF

                            VENUS EXPLORATION, INC.

         Venus Exploration, Inc. (the "Corporation" or the "Company"), a
corporation organized and existing under and by virtue of the General
Corporation Law of the State of Delaware, hereby certifies and adopts the
following Amendment to its Certificate of Incorporation:

         FIRST:  The dated of filing of the Corporation's original Certificate
of Incorporation with the Secretary of Sate of the State of Delaware was
September 5, 1985.

         SECOND: The Board of Directors of the Corporation, by unanimous
consent of its members filed with the minutes of the Board of Directors,
adopted the following resolution:

         FURTHER RESOLVED, that it is desirable for the Company to increase the
         number of authorized shares of (i) Common Stock from 15 million to 30
         million shares and (ii) Preferred Stock from 1 million to 5 million
         shares, and to accomplish the same, it is hereby declared advisable
         that the Certificate of Incorporation of the Company be amended by
         changing the first two sentences of Article FOURTH to read as follows:

         The Corporation shall have the authority to be exercised by the Board
         of Directors to issue (i) 30 million shares of common voting stock of
         the par value of $0.01 per share (the "Common Stock") having an
         aggregate par value of $300,000, (ii) 5 million shares of preferred
         stock of the par value of $0.01 per share (the "Preferred Stock")
         having an aggregate par value of $50,000.  Shares of the Preferred
         Stock shall be designated as the Board of Directors may determine and
         may be issued in series by the Board of Directors as hereinafter
         provided in paragraph (c) below.

         THIRD:  At a special meeting of the shareholders of the Corporation
held on October 28, 1997, stockholders of the Corporation holding in excess of
a majority of the outstanding shares entitled to vote thereon voted in favor of
the amendment in accordance with the provisions of Section 242 of the General
Corporation Law of the State of Delaware.

         FOURTH: The aforesaid amendment was duly adopted in accordance with
the applicable provisions of Section 242 of the General Corporation Law of the
State of Delaware.
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         IN WITNESS WHEREOF, said Venus Exploration, Inc., has caused this
certificate to be signed by John Y. Ames, its President, and attested by Will
C. Jones IV, its Secretary, this 7th day of November, 1997.

                                      VENUS EXPLORATION, INC.

ATTEST:


By:                                   By:                                    
   -----------------------------         ------------------------------------
   Will C. Jones, IV                     John Y. Ames, President
   Secretary