3DX TECHNOLOGIES INC
S-8, 1997-06-27
CRUDE PETROLEUM & NATURAL GAS
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         As filed with the Securities and Exchange Commission on June 27, 1997
                                                         Registration No. 333-


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 ---------------

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                 ---------------

                              3DX TECHNOLOGIES INC.
             (Exact Name of Registrant as Specified in Its Charter)

            Delaware                                 73-0386601
(State or Other Jurisdiction of          (I.R.S. Employer Identification No.)
Incorporation or Organization)

                          12012 Wickchester, Suite 250
                              Houston, Texas 77079

          (Address of Principal Executive Offices, Including Zip Code)

                             1994 STOCK OPTION PLAN
                            (Full Title of the Plan)

                                 Randall D. Keys
              Vice President of Finance and Chief Financial Officer
                          12012 Wickchester, Suite 250
                              Houston, Texas 77079
                                 (281) 579-3390


(Name, Address and Telephone Number, Including Area Code, of Agent For Service)

                                ---------------

                                    COPY TO:

                             JAY R. SCHIFFERLI, ESQ.
                            KELLEY DRYE & WARREN LLP
                               Two Stamford Plaza
                              281 Tresser Boulevard
                               Stamford, CT 06901

                                ---------------

                         CALCULATION OF REGISTRATION FEE

================================================================================
Title of                       Proposed          Proposed            
Securities       Amount        Maximum           Maximum            Amount of
to be            to be         Offering Price    Aggregate          Registration
Registered     Registered      Per Share (1)     Offering Price(1)  Fee
================================================================================

Common
Stock,
par value
$.01 per     2,004,937 shares    $9.25            $18,545,667        $5,619.90
share
================================================================================

(1)   Estimated  solely for the purpose of calculating the  registration  fee in
      accordance  with Rule 457(c) and (h) under the  Securities Act of 1933, as
      amended. The price per share is estimated based on the average of the high
      and low trading  prices for 3DX  Technologies  Inc.'s Common Stock on June
      20, 1997, as reported by the Nasdaq National Market.

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


<PAGE>



                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

      The following  documents filed with the Securities and Exchange Commission
(the  "Commission")  by 3DX  Technologies  Inc.  (the  "Registrant")  are hereby
incorporated by reference in this Registration Statement:

      (a) The  Registrant's  Annual  Report  on Form  10-K  for the  year  ended
December 31, 1996 as filed with the Commission on March 31, 1997, and as amended
by Form 10-K/A-1 filed with the Commission on April 30, 1997.

      (b) The  Registrant's  Form 10-Q for the quarter  ended March 31, 1996, as
filed with the Commission on May 15, 1997;

      (c) The description of the Registrant's  common stock, par value $0.01 per
share (the "Common Stock"),  contained in the Registration Statement on Form 8-A
(Registration No. 000-21841) filed with the Commission on December 9, 1996 under
Section 12 of the Exchange Act.

      All  documents and reports  filed by the  Registrant  pursuant to Sections
13(a),  13(c),  14 or 15(d) of the Exchange Act, after the date hereof and prior
to the filing of a post-effective  amendment to the Registration Statement which
indicates  that  the  securities   offered  hereby  have  been  sold,  or  which
deregisters all such  securities  remaining  unsold,  shall also be deemed to be
incorporated  by reference  into this  Registration  Statement  and to be a part
hereof commencing on the respective dates on which such documents are filed.

ITEM 4.   DESCRIPTION OF SECURITIES.

      Not Applicable.

ITEM 5.   INTERESTS OF NAMED EXPERTS AND COUNSEL.

      Not Applicable.

ITEM 6.   INDEMNIFICATION OF DIRECTORS AND OFFICERS.

      Section 145 of the Delaware General  Corporation Law (the "DGCL") provides
that a Delaware corporation may indemnify any person who was or is a party or is
threatened to be made a party to any  threatened,  pending or completed  action,
suit or proceeding, whether civil, criminal,  administrative or investigative (a
"proceeding")  (other than an action by or in the right of the  corporation)  by
reason of the fact that he is or was a director,  officer,  employee or agent of
the  corporation,  or is or was serving at the request of the  corporation  as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust or other  enterprise,  against  expenses  (including  attorneys'
fees),  judgments,  fines and amounts paid in settlement actually and reasonably
incurred by him in connection  with such action,  suit or proceeding if he acted
in good faith and in a manner he reasonably  believed to be in or not opposed to
the best interests of the corporation,  and, with respect to any criminal action
or proceeding,  had no reasonable  cause to believe his conduct was unlawful.  A
Delaware  corporation  may indemnify any person under such Section in connection
with a proceeding by or in the right of the  corporation to procure  judgment in
its favor, as provided in the preceding  sentence,  against expenses  (including
attorneys' fees) actually and reasonably  incurred by him in connection with the
defense or settlement of such action,  except that no  indemnification  shall be
made in respect  thereof  unless,  and then only to the extent  that, a court of
competent  jurisdiction  shall  determine upon  application  that such person is
fairly and reasonably entitled to indemnity for such expenses as the court shall
deem proper. A Delaware corporation must indemnify any person who was successful
on the merits or otherwise in defense of any action,  suit or  proceeding  or in
defense of any claim,  issue or matter in any proceeding,  by reason of the fact
that he is or was a director,  officer,  employee or agent of the corporation or
is or was serving at the request of the corporation, against expenses (including
attorneys'  fees)  actually  and  reasonably   incurred  by  him  in  connection
therewith. A Delaware corporation may pay for the expenses (including attorneys'
fees) incurred by an officer or director in defending a proceeding in advance of
the final  disposition  upon receipt of an  undertaking  by or on behalf of such
officer or director to repay such amount if it shall  ultimately  be  determined
that he is not entitled to be indemnified by the corporation.

                                       -2-

<PAGE>



      Section  102(b)(7) of the DGCL,  permits a  corporation  to provide in its
certificate of incorporation  that a director shall not be personally  liable to
the  corporation  or its  stockholders  for  monetary  damages  for a 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 any
acts or omissions not in good faith or which involve intentional misconduct or a
knowing violation of law, (iii) in respect of certain unlawful dividend payments
or stock redemptions or repurchases,  or (iv) for any transaction from which the
director derived an improper  personal  benefit.  Article IX of the Registrant's
Certificate  of  Incorporation  eliminates  the  liability  of  directors to the
fullest extent permitted by Section  102(b)(7) of the DGCL. The DGCL permits the
purchase of insurance on behalf of directors and officers  against any liability
asserted  against  directors  and  officers and incurred by such persons in such
capacity, or arising out of their status as such, whether or not the corporation
would have the power to indemnify directors and officers against such liability.
The Registrant has obtained  directors' and officers'  liability insurance which
insures  against  liabilities  that directors and officers of the Registrant may
incur in such  capacities.  The risks  covered by such  policies  do not exclude
liabilities  under the Securities  Act. In addition,  the Registrant has entered
into  indemnification  agreements  with its officers and  directors  pursuant to
which it has agreed to indemnify each such officer and director  against any and
all expenses,  losses,  claims,  damages and  liabilities  incurred by each such
officer and director for or as a result of actions taken or not taken while each
such  officer or  director  was acting in his or her  capacity  as a director or
officer of the Registrant.

      At present, there is no pending litigation or other proceeding involving a
director  or  officer of the  Registrant  as to which  indemnification  is being
sought, nor is the Registrant aware of any threatened litigation that may result
in claims for indemnification by any officer or director.

      Article Seventh of the Registrant's  Restated Certificate of Incorporation
and Section 5 of Article Fifth the Company's By-laws provide for indemnification
of the  Registrant's  directors and officers to the fullest extent  permitted by
Section 145 of the DGCL.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

      Not Applicable.

ITEM 8.  EXHIBITS.

EXHIBIT
NUMBER                          DESCRIPTION
- ------      --------------------------------------------------------------------

  *4.1      Restated Certificate of Incorporation of the Registrant, as amended.

  *4.2      1994 Stock Option Plan, as amended.

  *5        Opinion of Kelley Drye & Warren LLP  regarding  the  legality of the
            Common Stock being registered.

 *23.1      Consent of Kelley Drye & Warren LLP (included in their opinion filed
            as Exhibit 5).

 *23.2      Consent of Arthur Andersen LLP.

 *23.3      Consent of Ryder Scott Company Petroleum Engineers.

 *24        Powers of Attorney (See Signature Page).
- --------------------------
*Filed herewith

ITEM 9.  UNDERTAKINGS.

(a)   The undersigned Registrant hereby undertakes:

      (1) To file,  during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement;

            (i) To include  any  prospectus required  by Section 10(a)(3) of the
Securities Act of 1933;

                                       -3-

<PAGE>


            (ii) To reflect in the  prospectus any facts or events arising after
the  effective  date  of  this  Registration   Statement  (or  the  most  recent
post-effective  amendment  thereof)  which,  individually  or in the  aggregate,
represent a fundamental change in the information set forth in this Registration
Statement; and

            (iii) To include any material  information  with respect to the plan
of distribution not previously  disclosed in this Registration  Statement or any
material change to such information in this Registration Statement;

PROVIDED,  HOWEVER,  that paragraphs (a)(1)(i) and (a)(1)(ii) above do not apply
if the  information  required to be included in a  post-effective  amendment  by
those paragraphs is contained in periodic reports filed with or furnished to the
Securities and Exchange Commission (the "Commission") by the Registrant pursuant
to Section 13 or 15(d) of the Exchange Act that are incorporated by reference in
this Registration Statement.

      (2)  That,  for  the  purpose  of  determining  any  liability  under  the
Securities Act, each such  post-effective  amendment shall be deemed to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities at that time shall be deemed to be the initial BONA
FIDE offering thereof.

      (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.

(b)  The  undersigned   Registrant  hereby  undertakes  that,  for  purposes  of
determining  any  liability  under  the  Securities  Act,  each  filing  of  the
Registrant's  annual  report  pursuant to Section 13(a) or 15(d) of the Exchange
Act that is  incorporated by reference in this  Registration  Statement shall be
deemed to be a new  registration  statement  relating to the securities  offered
therein,  and the offering of such securities at that time shall be deemed to be
the initial BONA FIDE offering thereof.

(c) Insofar as indemnification  for liabilities arising under the Securities Act
may  be  permitted  to  directors,  officers  and  controlling  persons  of  the
Registrant  pursuant to the  provisions of Item 6, or otherwise,  the Registrant
has been advised that in the opinion of the Commission such  indemnification  is
against  public  policy as expressed in the  Securities  Act and is,  therefore,
unenforceable.  In the  event  that a claim  for  indemnification  against  such
liabilities  (other than the payment by the  Registrant of expenses  incurred or
paid by a  director,  officer or  controlling  person of the  Registrant  in the
successful  defense of any  action,  suit or  proceeding)  is  asserted  by such
director,  officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as  expressed  in the  Securities  Act and will be  governed by the final
adjudication of such issue.



                                       -4-

<PAGE>




                                    SIGNATURES

      Pursuant to the  requirements  of the  Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the  requirements  for  filing  on  Form  S-8 and has  duly  caused  this
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly authorized, in the City of Houston, State of Texas, on June 27, 1997.

                              3DX TECHNOLOGIES INC.



                                   By:     /S/ C. EUGENE ENNIS
                                       -----------------------------------------
                                           C. Eugene Ennis
                                           President and Chief Executive Officer


                                POWER OF ATTORNEY

      Each person whose individual  signature appears below hereby authorizes C.
Eugene  Ennis  and  Randall  D.  Keys and  each of them as his  true and  lawful
attorneys-in-fact,  with full power of substitution,  to execute in the name and
on behalf of such person, individually and in each capacity stated below, and to
file, any and all amendments to this Registration  Statement,  including any and
all post-effective amendments.

      Pursuant to the  requirements  of the  Securities Act of 1933, as amended,
this  Registration  Statement has been signed below by the following  persons in
the capacities indicated on June 27, 1997.


SIGNATURE                              TITLE
- ---------                              -----


   /S/ JON W. BAYLESS
- --------------------------------       Chairman of the Board and Director
           Jon W. Bayless


   /S/ C. EUGENE ENNIS
- --------------------------------       President and Chief Executive Officer 
           C. Eugene Ennis             and Director 

   /S/ RANDALL D. KEYS
- --------------------------------       Chief Financial Officer (Principal 
           Randall D. Keys             Financial and Accounting Officer) 
                                       and Director

   /S/ ROBERT H. CHANEY
- --------------------------------       Director
          Robert H. Chaney


   /S/ CHARLES E. EDWARDS
- --------------------------------       Director
         Charles E. Edwards


   /S/ DOUGLAS C. WILLIAMSON
- --------------------------------       Director
        Douglas C. Williamson





                                       -5-

<PAGE>




                                  EXHIBIT INDEX


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


  *4.1      Restated Certificate of Incorporation of the Registrant, as amended.

  *4.2      1994 Stock Option Plan, as amended.

  *5        Opinion of Kelley Drye & Warren LLP regarding legality of the Common
            Stock being registered.

 *23.1      Consent of Kelley Drye & Warren LLP (included in their opinion filed
            as Exhibit 5).

 *23.2      Consent of Arthur Andersen LLP.

 *23.3      Consent of Ryder Scott Company Petroleum Engineers.

 *24        Powers of Attorney (See Signature Page).

- --------------------------
*Filed herewith







                                                                   EXHIBIT 4.1


                     RESTATED CERTIFICATE OF INCORPORATION

                                      OF

                             3DX TECHNOLOGIES INC.


            It is hereby certified that:

            1.  The  name  of the  corporation  is 3DX  TECHNOLOGIES  INC.  (the
"Corporation"),  and  the  name  under  which  the  Corporation  was  originally
incorporated is Novera Energy Inc. The original  Certificate of Incorporation of
the Corporation was filed with the Office of the Secretary of State of the State
of Delaware on December 8, 1992. A Restated  Certificate  of  Incorporation  was
filed  with the Office of the  Secretary  of State of the State of  Delaware  on
January 27, 1993. A Second Restated  Certificate of Incorporation was filed with
the Office of the  Secretary  of State of the State of  Delaware  on November 9,
1993. A third Restated Certificate of Incorporation was filed with the Secretary
of State of the State of  Delaware  on  December  17,  1993.  A fourth  Restated
Certificate of Incorporation was filed with the Office of the Secretary of State
of the State of Delaware  on July 26,  1995.  A fifth  Restated  Certificate  of
Incorporation  was filed with the Office of the  Secretary of State of the State
of Delaware on December 19, 1996. An amendment to the fifth Restated Certificate
was filed with the Office of the  Secretary of State of the State of Delaware on
December 24, 1996 (as amended, the "Fifth Restated Certificate").

            2. The Fifth  Restated  Certificate  is hereby  restated and further
amended as follows:  (i) to eliminate the series of the Corporation's  Preferred
Stock designated  respectively as the Redeemable  Preferred Stock,  Series B and
the Senior Redeemable  Convertible Preferred Stock, Series C, and (ii) to reduce
the total number of shares of capital stock that the Corporation  shall have the
authority to issue from Twenty-Four  Million Five Hundred Thousand  (24,500,000)
shares to  Twenty-One  Million  (21,000,000)  shares,  of which  Twenty  Million
(20,000,000)  shares shall be Common  Stock,  par value $.01 per share,  and One
Million  (1,000,000) shares shall be designated  Preferred Stock, par value $.01
per share.

            3. Except for (i) the  inclusion of the  foregoing  amendments,  and
(ii) the renumbering of the Fifth Restated Certificate to effect the omission of
such matters,  there are no  discrepancies  between the  provisions of the Fifth
Restated  Certificate as heretofore  amended and supplemented and the provisions
of the said single instrument hereinafter set forth.

            4.  The  amendments  to  the  Fifth  Restated  Certificate  and  the
restatement of the Fifth  Restated  Certificate as amended as the sixth Restated
Certificate of Incorporation (the "Sixth Restated Certificate") herein certified
have been duly adopted by the stockholders of the Corporation in accordance with
the  provisions of Sections 228, 242 and 245 of the General  Corporation  Law of
the State of Delaware.



                                      1

<PAGE>



            The text of the Fifth  Restated  Certificate  is  restated  with the
amendments  described above,  effective as of 10:00 a.m. on December 26, 1996 to
read as follows:


            FIRST: The name of the corporation is 3DX  Technologies  Inc. (the
"Corporation").

            SECOND:  The address of the  Corporation's  registered office in the
State of Delaware is located at 1013 Centre Road, City of Wilmington,  County of
New Castle.  The name of its registered agent at such address is the Corporation
Service Company.

            THIRD: The nature of the business and the purpose of the Corporation
is to  engage in any  lawful  act or  activity  for  which  corporations  may be
organized under the General  Corporation Law of the State of Delaware ("Delaware
Corporation Law").

            FOURTH:  The  Corporation  shall have the authority to issue two (2)
classes of shares of capital  stock,  to be designated  respectively  "Preferred
Stock"  and  "Common  Stock".  The total  number  of  shares  of stock  that the
Corporation   shall  have  the   authority  to  issue  is   Twenty-One   Million
(21,000,000).  The total number of shares of Preferred Stock, par value $.01 per
share (the  "Preferred  Stock"),  that the  Corporation  shall have authority to
issue is One Million  (1,000,000).  The total number of shares of Common  Stock,
par value $.01 per share (the "Common Stock"),  that the Corporation  shall have
the authority to issue is Twenty Million (20,000,000).

            The following is a statement  fixing certain of the designations and
the powers, voting rights, preferences and relative, participating, optional and
other rights of the Preferred Stock and the Common Stock of the Corporation, and
the qualifications,  limitations or restrictions  thereof,  and of the authority
with  respect  thereto  expressly  granted  to the  Board  of  Directors  of the
Corporation  to fix  any  such  provisions  not  fixed  by this  Fifth  Restated
Certificate.


A.     PREFERRED STOCK

       The Board of Directors is hereby  expressly  vested with the authority to
adopt a resolution or  resolutions  providing  for the issue of  authorized  but
unissued  shares of  Preferred  Stock,  which  shares may be issued from time to
time,  in one or more  series and in such  amounts as may be  determined  by the
Board of Directors in such resolution or resolutions. The powers, voting rights,
designations, preferences and relative, participating, optional or other special
rights,  if any,  of each  series of  Preferred  Stock  and the  qualifications,
limitations  or  restrictions,   if  any,  of  such  preferences  and/or  rights
(collectively, the "Series Terms"), shall be such as are stated and expressed in
the  resolution  or  resolutions  providing for the issue of such series of such
previously  Preferred Stock (the "Series Terms Resolution") adopted by the Board
of  Directors.  The powers of the Board of Directors  with respect to the Series
Terms of a particular series (any of which powers may by resolution of the Board
of Directors be specifically delegated to one or more of its committees,  except
as prohibited by Delaware Corporation Law) shall include, but not be limited to,
determination of the following:



<PAGE>




                  (1)   The number of shares constituting that series and the
       distinctive designation of that series;

                  (2) The dividend  rate on the shares of that  series,  whether
       such  dividends,  if any,  shall be  cumulative,  and, if so, the date or
       dates from which dividends payable on such shares shall  accumulate,  and
       the  relative  rights of  priority,  if any, of payment of  dividends  on
       shares of that series;

                  (3) Whether that series shall have voting rights,  in addition
       to any  voting  rights  provided  by law,  and,  if so, the terms of such
       voting rights;

                  (4) Whether that series shall have conversion  privileges with
       respect to shares of any other  class or classes of stock or of any other
       series of any class of stock,  and,  if so, the terms and  conditions  of
       such  conversion  upon the  occurrence  of such  events  as the  Board of
       Directors shall determine;

                  (5)  Whether the shares of that  series  shall be  redeemable,
       and, if so, the terms and  conditions of such  redemption,  including the
       relative  rights of  priority  of the shares of such  series,  if any, of
       redemption,  the date or dates  upon or after  which  the  shares of such
       series shall be redeemable,  provisions regarding redemption notices, and
       the amount per share payable in case of redemption, which amount may vary
       under different conditions and at different redemption dates;

                  (6)  Whether  that  series  shall have a sinking  fund for the
       redemption  or purchase of shares of that  series,  and, if so, the terms
       and amount of such sinking fund;

                  (7) The  rights of the  shares of that  series in the event of
       voluntary or involuntary liquidation,  dissolution,  or winding up of the
       Corporation,  and the relative rights of priority,  if any, of payment of
       shares of that series;

                  (8) The  conditions  or  restrictions  upon  the  creation  of
       indebtedness  of the  Corporation  or upon  the  issuance  of  additional
       Preferred Stock or other capital stock ranking on a parity therewith,  or
       prior thereto,  with respect to dividends or  distribution of assets upon
       liquidation;

                  (9)  The  conditions  or  restrictions  with  respect  to  the
       issuance  of,  payment  of  dividends   upon,  or  the  making  of  other
       distributions  to, or the  acquisition  or redemption  of, shares ranking
       junior to the  Preferred  Stock or to any series  thereof with respect to
       dividends or distribution of assets upon liquidation; and

                  (10) Any other  designation,  preference,  power and right and
       any qualification,  limitation or restriction  thereon as may be fixed by
       resolution or  resolutions  of the Board of Directors  under the Delaware
       Corporation Law.


                                   2

<PAGE>




       Any of the Series Terms,  including  voting rights,  of any series may be
made dependent upon facts  ascertainable  outside this Restated  Certificate and
the Series Terms Resolution,  provided that the manner in which such facts shall
operate  upon such  Series  Terms is  clearly  and  expressly  set forth in this
Restated Certificate or in the Series Terms Resolution.


B.     COMMON STOCK

       The Common Stock shall consist of Twenty Million (20,000,000) shares. The
powers,  preferences  and  rights,  and  the  qualifications,   limitations  and
restrictions of the Common Stock are as follows:

                  1. VOTING, ETC. Each holder of shares of Common Stock shall be
entitled  to one (1) vote for each share  held.  Each  share of Common  Stock is
vested  with all of the same  rights  and  powers  in all  respects,  including,
without limitation, dividend and liquidation rights.

                  2.  DIVIDENDS.  When and as dividends  are  declared  thereon,
whether payable in cash,  property or securities of the Corporation,  holders of
Common Stock will be entitled to share in such  dividends  ratably  according to
the number of shares of Common Stock held by such holder,  subject to the rights
of the  holders  of shares of any  series  of  Preferred  Stock set forth in any
Series Terms Resolution.

                  3.  LIQUIDATION  RIGHTS.  In the  event  of  any  liquidation,
dissolution or winding up of the Corporation,  whether voluntary or involuntary,
after payment or provision for the payment of the debts and other liabilities of
the Corporation and the payment or setting aside for payment of any preferential
amount  due to the  holders  of shares of any  series of  Preferred  Stock,  the
holders of Common  Stock shall be entitled to share,  ratably  according  to the
number of shares of Common Stock held by them,  in the  remaining  assets of the
Corporation  available  for  distribution  to its  stockholders,  subject to the
rights of the  holders of any shares of any class of stock or series  ranking on
parity with the Common Stock as to payment or distribution in such event.

                  4.    ACTION BY STOCKHOLDERS.  Except as otherwise provided in
this Restated Certificate, no action may be taken by holders of shares of Common
Stock except at a duly called annual or special meeting of stockholders.

       FIFTH:  In furtherance  and not in limitation of the powers  conferred by
statute,  the Second Amended and Restated By-laws, as such By-Laws,  may be from
time to time amended,  modified or supplemented (as amended, the "By-Laws"),  of
the  Corporation may be modified,  altered,  amended or repealed by the Board of
Directors pursuant to a resolution adopted by the affirmative vote of a majority
of the entire Board of Directors.

       SIXTH:  The  following  provisions  are  inserted  for  purposes  of  the
management of the business and conduct of the affairs of the Corporation and for
creating,  defining,  limiting and regulating the powers of the  Corporation and
its directors and stockholders:



                                      3

<PAGE>



       A.         GENERAL POWER OF BOARD OF DIRECTORS.

                  The powers of the  Corporation  shall be exercised by or under
       the authority of, and the business and affairs of the  Corporation  shall
       be managed under the  direction  of, a Board of Directors.  The number of
       directors  may be increased  or decreased by the Board of Directors  from
       time to time as provided in the By-laws.

       B.         CLASSIFIED BOARD OF DIRECTORS.

                  The Board of  Directors  of the  Corporation  shall be divided
       into  three  classes  designated  as Class A,  Class B and  Class C, each
       initially  composed of such number of  directors as is nearly as equal in
       number  as is  possible.  Upon any  change  in the  size of the  Board of
       Directors,  each class shall  consist,  as nearly as may be possible,  of
       one-third (1/3) of the total number of directors  constituting the entire
       Board of Directors.

                  The initial  term of office of Class A directors  shall expire
       at the next annual meeting of stockholders  of the Corporation  following
       the filing of the  Corporation's  Restated  Certificate of  Incorporation
       which was filed with the Office of the Secretary of State of the State of
       Delaware  on  December  19,  1996  (the   "December   19,  1996  Restated
       Certificate");  the  initial  term of office of Class B  directors  shall
       expire at the second annual meeting of  stockholders  of the  Corporation
       following  the filing of the December 19, 1996  Restated  Certificate  of
       Incorporation;  and the initial term of office of Class C directors shall
       expire at the third annual  meeting of  stockholders  of the  Corporation
       following  the filing of the December 19, 1996  Restated  Certificate  of
       Incorporation.  The initial designation of directors among Class A, Class
       B and Class C shall be made by the  Board of  Directors.  At each  annual
       meeting of  stockholders,  the successors to the class of directors whose
       term  shall  then  expire  shall be  elected  to hold  office  for a term
       expiring at the third  succeeding  annual meeting of  stockholders.  Each
       director  shall hold  office for the term for which he or she was elected
       and until his or her  successor is elected and  qualified or until his or
       her resignation or removal. Any vacancy on the Board of Directors for any
       reason shall be filled in accordance with the By-laws.

       SEVENTH:  No director of the Corporation shall have personal liability to
the Corporation or its stockholders for monetary damages for breach of fiduciary
duty as a  director,  provided  that  nothing  in  this  Article  SEVENTH  shall
eliminate  or limit  the  liability  of a  director  (i) for any  breach  of the
director's duty of loyalty to the Corporation or its stockholders,  (ii) for any
act or omission not in good faith or which involve  intentional  misconduct or a
knowing  violation of law,  (iii) under Section 174 of the Delaware  Corporation
Law, or (iv) for any  transaction  from which the director  derived any improper
personal benefit. In the event the Delaware Corporation Law is amended after the
date hereof so as to authorize  corporate action further eliminating or limiting
the  liability of directors of the  Corporation,  the liability of the directors
shall thereupon be eliminated or limited to the maximum extent  permitted by the
Delaware  Corporation  Law,  as so  amended  from  time to time.  Any  repeal or
modification  of  the  foregoing  provisions  of  this  Article  SEVENTH  by the
stockholders of the Corporation shall


                                      4

<PAGE>



not adversely affect any right or protection of a director  existing at the time
of such repeal or modification.

       EIGHTH: The Corporation shall, to the fullest extent permitted by Section
145  of  the  Delaware   Corporation  Law,  as  the  same  may  be  amended  and
supplemented,  indemnify  any and  all  persons  whom it  shall  have  power  to
indemnify under Section 145 from and against any and all expense,  liability, or
other matter referred to in or covered by said section,  and the indemnification
provided  for herein  shall not be deemed  exclusive of any other right to which
those  indemnified  may  be  entitled  under  any  by-law,  agreement,  vote  of
stockholders or disinterested  directors or otherwise,  both as to action in his
official  capacity  and as to action in  another  capacity  while  holding  such
office,  and shall  continue  as to a person  who has  ceased to be a  director,
officer,  employee,  or agent  and  shall  inure to the  benefit  of the  heirs,
executors, and administrators of such a person.

       NINTH:  The  Corporation  reserves the right to amend,  alter,  change or
repeal any provision contained in this Restated  Certificate,  in any manner now
or hereafter  prescribed by statute,  and all rights conferred upon stockholders
herein  are  granted  subject to this  reservation  and  further  subject to the
condition that any amendment to each of Article  Fourth,  Sections B and C(4) of
this Restated  Certificate  and this Article Ninth shall require the affirmative
vote of  holders of at least 67% of the  issued  and  outstanding  shares of the
Corporation's capital stock entitled to vote thereon.



                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]



                                      5

<PAGE>



                  IN WITNESS  WHEREOF,  3DX  Technologies  Inc.  has caused this
Restated  Certificate  of  Incorporation  to be  signed  by its duly  authorized
officer this 26th day of December, 1996.


                               /S/ C. EUGENE ENNIS
                               -----------------------------------------
                               C. Eugene Ennis
                               President and Chief Executive Officer



                                      6

<PAGE>


                           CERTIFICATE OF AMENDMENT

                                      OF

                     RESTATED CERTIFICATE OF INCORPORATION

                                      OF

                             3DX TECHNOLOGIES INC.


            The   undersigned,   being  the  duly   elected   President  of  3DX
Technologies  Inc. (the  "Corporation"),  a  corporation  organized and existing
under and by virtue of the  General  Corporation  Law of the State of  Delaware,
does hereby certify:

            FIRST:  That  at  a  meeting  of  the  Board  of  Directors  of  the
Corporation at which all directors were present,  resolutions  were duly adopted
setting forth a proposed amendment to the Restated  Certificate of Incorporation
(the "Restated Certificate") of the Corporation,  declaring said amendment to be
advisable  and  calling a meeting of the  stockholders  of the  Corporation  for
consideration thereof. The resolution setting forth the proposed amendment is as
follows:

                  RESOLVED,  that Article SIXTH of the Restated  Certificate  of
            the  Corporation  is hereby  amended and restated in its entirety to
            read as follows:

                  SIXTH: The powers of the Corporation  shall be exercised by or
            under  the  authority  of,  and  the  business  and  affairs  of the
            Corporation  shall be  managed  under the  direction  of, a Board of
            Directors.  The number of directors may be increased or decreased by
            the Board of Directors from time to time as provided in the Bylaws.

            SECOND: That thereafter at a duly called meeting of the holders of a
majority  of the issued and  outstanding  capital  stock of the  Corporation,  a
majority of shares as required by statute were voted in favor of the amendment.

            THIRD:  That such amendment was duly adopted in accordance with the
provisions  of  Section  242 of the  General  Corporation  Law of the  State  of
Delaware.

            IN WITNESS  WHEREOF,  said 3DX  Technologies  Inc.  has caused  this
Certificate of Amendment to be signed by C. Eugene Ennis,  its  President,  this
13th day of June, 1997.


                               /S/ C. EUGENE ENNIS
                               -------------------------------------------
                                   C. Eugene Ennis, President





                              3DX TECHNOLOGIES INC.

                             1994 STOCK OPTION PLAN
                            (Amended June 13, 1997)


     1. ESTABLISHMENT AND PURPOSE.

     (a) ESTABLISHMENT. The 3DX TECHNOLOGIES INC. Employee Stock Option Plan was
adopted effective January 4, 1994 (the "PLAN").

     (b)  PURPOSE.  The  purpose  of the Plan is to  attract,  retain and reward
persons providing services to 3DX Technologies Inc., a Delaware corporation, and
any successor corporation thereto  (collectively  referred to as the "COMPANY"),
and  any  present  or  future  parent  and/or  subsidiary  corporations  of such
corporation (all of which along with the Company being individually  referred to
as a "PARTICIPATING  COMPANY" and collectively referred to as the "PARTICIPATING
COMPANY  GROUP"),  and to motivate  such persons to contribute to the growth and
profits of the  Participating  Company Group in the future.  For purposes of the
Plan, a parent  corporation and a subsidiary  corporation shall be as defined in
Sections 424(e) and 424(f) of the Internal Revenue Code of 1986, as amended (the
"CODE").

     2. ADMINISTRATION.

     (a)   ADMINISTRATION  BY  BOARD  AND/OR   COMMITTEE.   The  Plan  shall  be
administered  by the Board of Directors of the Company (the "BOARD") and/or by a
duly  appointed  committee of the Board having such powers as shall be specified
by the Board. Any subsequent  references herein to the Board shall also mean the
committee if such  committee has been  appointed  and,  unless the powers of the
committee have been  specifically  limited,  the committee shall have all of the
powers of the Board granted herein, including,  without limitation, the power to
terminate  or amend the Plan at any time,  subject  to the terms of the Plan and
any applicable  limitations  imposed by law. All questions of  interpretation of
the  Plan or of any  options  granted  under  the Plan  (an  "Option")  shall be
determined by the Board, and such determinations shall be final and binding upon
all persons having an interest in the Plan and/or any Option.

     (b) OPTIONS  AUTHORIZED.  Options may be either  incentive stock options as
defined in Section 422 of the Code ("INCENTIVE  STOCK OPTIONS") or non-statutory
stock options.

     (c)  AUTHORITY OF OFFICERS.  Any officer of a  Participating  Company shall
have the  authority  to act on behalf of the Company with respect to any matter,
right,  obligation,  or  election  which  is the  responsibility  of or which is
allocated to the Company  herein,  provided  the officer has apparent  authority
with respect to such matter, right, obligation, or election.





<PAGE>




     3. ELIGIBILITY.

     (a) ELIGIBLE PERSONS.  Options may be granted only to employees  (including
officers) and directors of the Participating Company Group or to individuals who
are  rendering   services  as  consultants,   advisors,   or  other  independent
contractors to the  Participating  Company Group.  The Board shall,  in its sole
discretion,  determine which persons shall be granted  Options (an  "OPTIONEE").
Eligible persons may be granted more than one (1) Option.

     (b)  RESTRICTIONS ON OPTION GRANTS.  A director of a Participating  Company
may only be granted a non-statutory  stock option unless the director is also an
employee of the  Participating  Company  Group.  An individual  who is rendering
services as a consultant,  advisor, or other independent  contractor may only be
granted a non-statutory stock option.

     4. SHARES SUBJECT TO OPTION. Options shall be for the purchase of shares of
the authorized but unissued common stock or treasury shares of common stock $.01
par value of the Company (the  "STOCK"),  subject to  adjustment  as provided in
paragraph 10 below. The maximum number of shares of Stock which may be 2,004,937
shares.  In the event that any  outstanding  Option for any reason expires or is
terminated  or  canceled  and/or  shares  of Stock  subject  to  repurchase  are
repurchased by the Company,  the shares allocable to the unexercised  portion of
such  Option,  or such  repurchased  shares,  may again be  subject to an Option
grant.  Notwithstanding the foregoing any such shares shall be made subject to a
new Option only if the grant of such new Option and the  issuance of such shares
pursuant to such new Option would not cause the Plan or any Option granted under
the Plan to contravene Rule 16b-3.

     5. TIME FOR  GRANTING  OPTIONS.  All Options  shall be granted,  if at all,
within ten (10)  years  from the  earlier of the date the Plan is adopted by the
Board or the date the Plan approved by the stockholders of the Company.

     6. TERMS, CONDITIONS AND FORM OF OPTIONS.  Subject to the provisions of the
Plan,  the Board shall  determine  for each Option (which need not be identical)
the  number  of shares of Stock for  which  the  Option  shall be  granted,  the
exercise price of the Option, the timing and terms of exercisability and vesting
of the  Option,  the  time  of  expiration  of the  Option,  the  effect  of the
Optionee's  termination  of employment  or service,  whether the Option is to be
treated as an Incentive  Stock Option or as a  non-statutory  stock option,  the
method for satisfaction of any tax withholding  obligation arising in connection
with Option,  including by the  withholding or delivery of shares of stock,  and
all other terms and  conditions  of the Option not  inconsistent  with the Plan.
Options  granted  pursuant to the Plan shall be evidenced by written  agreements
specifying  the number of shares of Stock covered  thereby,  in such form as the
Board shall from time to time establish, which agreements may incorporate all or
any of the terms of the Plan by  reference  and shall comply with and be subject
to the following terms and conditions:




                                      - 2 -

<PAGE>




     (a) EXERCISE PRICE. The exercise price for each Option shall be established
in the sole discretion of the Board;  provided,  however;  that (i) the exercise
price per share for an  Incentive  Stock  Option shall be not less than the fair
market value, as determined by the Board, of a share of Stock on the date of the
granting of the Option,  (ii) the exercise  price per share for a  non-statutory
stock option shall not be less than eighty-five percent (85%) of the fair market
value,  as  determined  by the  Board,  of a share  of  Stock on the date of the
granting  of the  Option  and (iii) no  Incentive  Stock  Option  granted  to an
Optionee who at the time the Option is granted owns stock  possessing  more than
ten percent (10%) of the total combined  voting power of all classes of stock of
a Participating  Company within the meaning of Section  422(b)(6) of the Code (a
"TEN PERCENT OWNER  OPTIONEE")  shall have an exercise price per share less than
one hundred ten percent  (110%) of the fair market  value,  as determined by the
Board,  of a  share  of  Stock  on the  date  of  the  granting  of the  Option.
Notwithstanding the foregoing, an Option (whether an Incentive Stock Option or a
non-statutory stock option) may be granted with an exercise price lower than the
minimum  exercise price set forth above if such Option is granted pursuant to an
assumption or  substitution  for another option in a manner  qualifying with the
provisions of Section 424(a) of the Code.

     (b)  EXERCISE  PERIOD OF  OPTIONS.  The Board  shall have the power to set,
including by amendment of an Option,  the time or times within which each Option
shall be  exercisable or the event or events upon the occurrence of which all or
a portion  of each  Option  shall be  exercisable  and the term of each  Option;
provided,  however, that (i) no Option shall be exercisable after the expiration
of ten (10) years after the date such Option is granted,  and (ii) no  Incentive
Stock Option granted to a Ten Percent Owner Optionee shall be exercisable  after
the expiration of five (5) years after the date such Option is granted.

     (c) PAYMENT OF EXERCISE PRICE.

     (i) FORMS OF  PAYMENT  AUTHORIZED.  Payment of the  exercise  price for the
number of shares of Stock being  purchased  pursuant to any Option shall be made
(1) in cash,  by check,  or cash  equivalent,  (2) by tender to the  Company  of
shares of the Company's  stock owned by the Optionee having a fair market value,
as  determined  by  the  Board  (but  without  regard  to  any  restrictions  on
transferability  applicable  to  such  stock  by  reason  of  federal  or  state
securities  laws or agreements  with an underwriter  for the Company),  not less
than the exercise  price,  (3) by the Optionee's  recourse  promissory note in a
form approved by the Company, (4) by the assignment of the proceeds of a sale of
some or all of the  shares  being  acquired  upon  the  exercise  of the  Option
(including,   without  limitation,   through  an  exercise  complying  with  the
provisions  of  Regulation  T as  promulgated  from time to time by the Board of
Governors of the Federal Reserve System), (5) by the withholding of shares being
acquired upon  exercise of the Option having a fair market value,  as determined
by the  Board  (but  without  regard  to  any  restrictions  on  transferability
applicable  to such  stock by  reason of  federal  or state  securities  laws or
agreements  with an  underwriter  for the  Company),  not less than the exercise
price, or (6) by any combination thereof. The Board may at any time or from time
to time grant Options which do not permit




                                      - 3 -

<PAGE>



all of the  foregoing  forms  of  consideration  to be  used in  payment  of the
exercise  price  and/or  which  otherwise  restrict  one  (1) or more  forms  of
consideration.

     (ii) TENDER OF COMPANY STOCK.  Notwithstanding the foregoing, an Option may
not be  exercised by tender to the Company of shares of the  Company's  stock to
the extent such tender of stock, as determined by the Board,  would constitute a
violation of the provisions of any law, regulation and/or agreement  restricting
the redemption of the Company's stock.  Unless otherwise  provided by the Board,
an  Option  may not be  exercised  by  tender  to the  Company  of shares of the
Company's stock unless such shares of the Company's stock either have been owned
by the Optionee for more than six (6) months or were not  acquired,  directly or
indirectly, from the Company.

     (iii)  PROMISSORY  NOTES.  No  promissory  note  shall be  permitted  if an
exercise using a promissory  note would be a violation of any law. Any permitted
promissory  note shall be due and payable not more than four (4) years after the
Option is exercised,  and interest  shall be payable at least annually and be at
least equal to the minimum  interest rate  necessary to avoid  imputed  interest
pursuant  to all  applicable  sections  of the Code.  The Board  shall  have the
authority to permit or require the Optionee to secure any  promissory  note used
to  exercise  an Option  with the shares of Stock  acquired  on  exercise of the
Option and/or with other collateral acceptable to the Company.  Unless otherwise
provided  by the Board,  in the event the  Company at any time is subject to the
regulations  promulgated by the Board of Governors of the Federal Reserve System
or any other governmental entity affecting the extension of credit in connection
with the  Company's  securities,  any  promissory  note shall  comply  with such
applicable  regulations,  and the Optionee  shall pay the unpaid  principal  and
accrued interest, if any, to the extent necessary to comply with such applicable
regulations.

     (iv) ASSIGNMENT OF PROCEEDS OF SALE. The Company  reserves,  at any and all
times, the right, in the Company's sole and absolute  discretion,  to establish,
decline to approve  and/or  terminate  any  program  and/or  procedures  for the
exercise of Options by means of an  assignment of the proceeds of a sale of some
or all of the shares of Stock to be acquired upon such exercise.

     7. STANDARD FORMS OF STOCK OPTION AGREEMENT.

     (a) INCENTIVE STOCK OPTIONS.  Unless otherwise provided for by the Board at
the time an Option is  granted,  an Option  designated  as an  "Incentive  Stock
Option" shall comply with and be subject to the terms and  conditions  set forth
in the form of incentive stock option agreement attached hereto as EXHIBIT A and
incorporated herein by reference.

     (b) NON-STATUTORY STOCK OPTIONS. Unless otherwise provided for by the Board
at the time an Option is granted, an Option designated as a "Non-statutory Stock
Option" shall comply with and be subject to the terms and  conditions  set forth
in the forms




                                      - 4 -

<PAGE>



of  non-statutory  stock  option  agreement  attached  hereto  as  EXHIBIT B and
incorporated herein by reference.

     (c) STANDARD TERM FOR OPTIONS.  Unless otherwise  provided for by the Board
in the grant of an Option, any Option granted hereunder shall be exercisable for
a term of ten (10) years.

     8. AUTHORITY TO VARY TERMS. The Board shall have the authority from time to
time to vary the terms of either of the standard forms of Stock Option Agreement
described in paragraph 7 above either in connection  with the grant or amendment
of an  individual  Option  or in  connection  with  the  authorization  of a new
standard form or forms; provided, however, that the terms and conditions of such
revised or amended  standard form or forms of stock option agreement shall be in
accordance with the terms of the Plan. Such authority shall include,  but not by
way of  limitation,  the authority to grant  Options  which are not  immediately
exercisable.

     9. FAIR MARKET  VALUE  LIMITATION.  To the extent that the  aggregate  fair
market  value  (determined  at the time the  Option is  granted)  of stock  with
respect to which  Incentive Stock Options are exercisable by an Optionee for the
first time  during  any  calendar  year  (under  all stock  option  plans of the
Company,  including the Plan) exceeds One Hundred Thousand  Dollars  ($100,000),
such Options shall be treated as  non-statutory  stock  options.  This paragraph
shall be applied by taking  Incentive Stock Options into account in the order in
which they were granted.

     10.  EFFECT OF CHANGE IN STOCK  SUBJECT  TO PLAN.  Appropriate  adjustments
shall be made in the number and class of shares of Stock subject to the Plan and
to any outstanding  Options and in the exercise price of any outstanding Options
in  the  event  of  a  stock  dividend,   stock  split,   reverse  stock  split,
recapitalization,  combination,  reclassification, or like change in the capital
structure of the Company.

     In the event a majority  of the  shares  which are of the same class as the
shares that are subject to  outstanding  Options are  exchanged  for,  converted
into, or otherwise  become (whether or not pursuant to a Transfer of Control (as
defined below)) shares of another  corporation  (the "New Shares"),  the Company
may unilaterally amend the outstanding  Options to provide that such Options are
exercisable for New Shares.  In the event of any such  amendment,  the number of
shares and the exercise price of the outstanding  Options shall be adjusted in a
fair and equitable manner.

     11.  TRANSFER OF CONTROL.  A "TRANSFER OF CONTROL"  shall be deemed to have
occurred in the event any of the following occurs with respect to the Company.

     (a) the acquisition of direct or indirect ownership of stock by any person,
entity or group of persons or entities acting in concert  possessing more than a
majority of the beneficial interest in the voting stock of the Company;





                                      - 5 -

<PAGE>



     (b) the direct or  indirect  sale or exchange  by the  stockholders  of the
Company  of all or  substantially  all of the  stock of the  Company  where  the
stockholders of the Company before such sale or exchange do not retain, directly
or  indirectly,  at least a majority  of the  beneficial  interest in the voting
stock of the Company after such sale or exchange;

     (c) a merger or consolidation  where the stockholders of the Company before
such merger or consolidation do not retain,  directly or indirectly,  at least a
majority of the  beneficial  interest in the voting  stock of the Company  after
such merger or consolidation;

     (d) the sale,  exchange,  or  transfer of all or  substantially  all of the
assets of the Company  (other than a sale,  exchange,  or transfer to one (1) or
more subsidiary  corporations (as defined in paragraph 1 above) of the Company);
or

     (e) a liquidation or dissolution of the Company.

For purposes of the foregoing,  if a group of persons or entities  begins to act
in concert,  and if such group meets the beneficial  ownership  requirements set
forth in  clause  (a)  above,  then  such  acquisition  shall be  deemed to have
occurred  on the date  the  Company  first  becomes  aware of such  group or its
actions.

     A Stock Option  Agreement may, in the discretion of the Board,  provide for
accelerated vesting in the event of a Transer of Control.

     In  the  event  of  a  Transfer  of  Control,  the  surviving,  continuing,
successor,  or purchasing corporation or parent corporation thereof, as the case
may be (the "ACQUIRING  CORPORATION"),  shall either assume the Company's rights
and obligations under outstanding stock option agreements or substitute  options
for the Acquiring Corporation's stock for such outstanding Options. In the event
the  Acquiring   Corporation  elects  not  to  assume  or  substitute  for  such
outstanding   Options  in   connection   with  the  Transfer  of  Control,   any
unexercisable  and/or unvested shares subject to such  outstanding  stock option
agreements  shall be  immediately  exercisable  and fully  vested as of the date
thirty  (30)  days  prior to the  proposed  effective  date of the  Transfer  of
Control.  The exercise and/or vesting of any Option that was permissible  solely
by reason of this paragraph 11 shall be conditioned upon the consummation of the
Transfer of Control. Any Options which are neither assumed or substituted for by
the  Acquiring  Corporation  in  connection  with the  Transfer  of Control  nor
exercised as of the date of the Transfer of Control shall terminate and cease to
be outstanding effective as of the date of the Transfer of Control.

     12.  PROVISION  OF  INFORMATION.  Each  Optionee  shall be given  access to
information concerning the Company equivalent to that information generally made
available to the Company's common stockholders generally.





                                     - 6 -

<PAGE>


     13.  OPTIONS  NON-TRANSFERABLE.  During the lifetime of the  Optionee,  the
Option shall be exercisable only by the Optionee.  No Option shall be assignable
or  transferable  by the Optionee,  except by will or by the laws of descent and
distribution.

     14. TERMINATION OR AMENDMENT OF PLAN OR OPTIONS.  The Board,  including any
duly  appointed  committee of the Board,  may terminate or amend the Plan or any
Option  at any  time;  provided,  however,  that  without  the  approval  of the
Company's  stockholders,  there shall be (a) no increase in the total  number of
shares of Stock  covered by the Plan (except by operation of the  provisions  of
paragraph 10 above),  (b) no change in the class  eligible to receive  Incentive
Stock   Options  and  (c)  no  expansion  in  the  class   eligible  to  receive
non-statutory stock options.  In addition to the foregoing,  the approval of the
Company's  stockholders  shall be sought for any amendment to the Plan for which
the Board  deems  stockholder  approval  necessary  in order to comply with Rule
16b-3.  In any event,  no amendment  may adversely  affect any then  outstanding
Option or any unexercised portion thereof,  without the consent of the Optionee,
unless such amendment is required to enable an Option designated as an Incentive
Stock Option to qualify as an Incentive Stock Option.






                                      - 7 -






                            KELLEY DRYE & WARREN LLP
                               Two Stamford Plaza
                              281 Tresser Boulevard
                             Stamford, CT 06901-3229

                                 (203) 324-1400






                                  June 25, 1997




3DX Technologies Inc.
12012 Wickchester, Suite 250
Houston, Texas  77079

Dear Sirs:

            We are  acting as  counsel  to 3DX  Technologies  Inc.,  a  Delaware
corporation (the "Company"),  in connection with the preparation and filing with
the  Securities and Exchange  Commission  (the  "Commission")  of a Registration
Statement on Form S-8 (the "Registration Statement") under the Securities Act of
1933, as amended (the "Act").  The Registration  Statement  relates to 2,004,937
shares of the Company's  Common Stock, par value $0.01 per share (the "Shares"),
which are to be issued  pursuant to the  Company's  1994 Stock Option  Plan,  as
amended (the "Plan").

            In connection  with this  opinion,  we have examined and relied upon
copies  certified or otherwise  identified to our satisfaction of: (i) the Plan;
(ii) an  executed  copy  of the  Registration  Statement;  (iii)  the  Company's
Restated  Certificate of  Incorporation,  as amended;  (iv) the Company's Second
Amended and Restated By-laws, as amended; (v) the minute books and other records
of corporate  proceedings of the Company, as made available to us by officers of
the Company and we have reviewed such matters of law as we have deemed necessary
or appropriate for the purpose of rendering this opinion.

            For purposes of this opinion we have assumed the authenticity of all
documents  submitted  to us as  originals,  the  conformity  to originals of all
documents   submitted  to  us  as  certified  or  photostatic  copies,  and  the
authenticity  of the  originals of all documents  submitted to us as copies.  We
have also assumed the legal capacity of all natural persons,  the genuineness of
all  signatures on all  documents  examined by us, the authority of such persons
signing on behalf of the  parties  thereto  other than the  Company  and the due
authorization,  execution and delivery of all  documents by the parties  thereto
other than the Company.  As to certain factual  matters  material to the opinion
expressed   herein,  we  have  relied  to  the  extent  we  deemed  proper  upon
representations, warranties and statements as to factual matters of officers and
other representatives of the Company.



<PAGE>


3DX Technologies Inc.
June 25, 1997
Page 2


            Our opinion expressed below is subject to the qualifications that we
express no opinion as to the applicability of, compliance with, or effect of (i)
any  bankruptcy,  insolvency,  moratorium or other similar  federal or state law
affecting  the rights and remedies of creditors  generally  (including,  without
limitation,   fraudulent   conveyance   laws),   (ii)   providing  for  specific
performance,  injunctive  relief  or other  equitable  remedies,  regardless  of
whether such enforceability is sought in a proceeding in equity or at law, (iii)
public  policy  considerations  which may limit the  rights of parties to obtain
certain  remedies  and (iv) any law of any  jurisdiction  other than laws of the
States of  Delaware  and New York and the federal  laws of the United  States of
America.  Without limiting the foregoing,  we express no opinion with respect to
the applicability thereto or effect of municipal laws or the rules,  regulations
or orders of any municipal agencies within any such state.

            Based upon and subject to the foregoing qualifications,  assumptions
and limitations  and the further  limitations set forth below, it is our opinion
that the Shares to be issued by the Company  pursuant to the Plan have been duly
authorized and reserved for issuance and, when  certificates for the Shares have
been duly  executed by the  Company,  countersigned  by a transfer  agent,  duly
registered  by a registrar  for the Shares and issued and paid for in accordance
with the terms of the Plan,  the Shares will be validly  issued,  fully paid and
non-assessable.

            This opinion is limited to the specific issues addressed herein, and
no opinion may be inferred or implied beyond that expressly stated herein.  This
opinion is given as of the date hereof and we assume no  obligation to update or
supplement this opinion to reflect any facts or  circumstances or changes in law
which may occur after the date hereof.

            We hereby  consent to the filing of this letter as an exhibit to the
Registration  Statement.  In giving such consent, we do not admit that we are in
the category of persons whose consent is required  under Section 7 of the Act or
the rules and regulations of the Commission promulgated thereunder.

            This opinion is furnished  to you in  connection  with the filing of
the  Registration  Statement  and is  not  to be  used,  circulated,  quoted  or
otherwise relied upon for any other purpose.


                                    Very truly yours,

                                    KELLEY DRYE & WARREN LLP



                                    By: /S/ JAY R. SCHIFFERLI
                                        -----------------------------------
                                        A Member of the Firm








                                                                  EXHIBIT 23.2
                                                                  ------------


                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent  public  accountants,  we hereby consent to the  incorporation by
reference  in this  registration  statement  of our report  dated March 14, 1997
included in the Annual Report on Form 10-k, as amended, of 3DX Technologies Inc.
for the year ended  December 31, 1996 and to all references to our Firm included
in this registration statement.


                                                           ARTHUR ANDERSEN LLP



Houston, Texas
June 25, 1997




                                                                  EXHIBIT 23.3
                                                                  ------------


                  CONSENT OF INDEPENDENT PETROLEUM ENGINEERS


            As  independent  petroleum  engineers,  we  hereby  consent  to  the
incorporation  by  reference  into this  registration  statement on Form S-8 our
report and estimates,  as of February 6, 1997, of the reserves and present value
of future net reserves of 3DX Technologies Inc. included in its Annual Report on
Form 10-K for the year ended December 31, 1996.


Houston, Texas
June 25, 1997




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