UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 4
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
( ) Check this box if no longer subject to Section 16.
Form 4 or Form 5 obligations may continue. See Instructions 1(b).
1. Name and Address of Reporting Person
   Ennis, C. Eugene
   
   c/o 3DX Technologies Inc.
   12012 Wickchester, Suite 250
   Houston, TX  77079-1218
2. Issuer Name and Ticker or Trading Symbol
   3DX Technologies Inc.
   TDXT
3. IRS or Social Security Number of Reporting Person (Voluntary)
   
4. Statement for Month/Year
   August 1997
5. If Amendment, Date of Original (Month/Year)
   
6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
   (X) Director ( ) 10% Owner (X) Officer (give title below) ( ) Other
   (specify below)
   President and Chief Executive Officer
7. Individual or Joint/Group Filing (Check Applicable Line)
   (X) Form filed by One Reporting Person
   ( ) Form filed by More than One Reporting Person


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 Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned                                                 |
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1. Title of Security       |2.    |3.    |4.Securities Acquired (A)         |5.Amount of        |6.Dir |7.Nature of Indirect       |
                           | Transaction |  or Disposed of (D)              |  Securities       |ect   |  Beneficial Ownership     |
                           |      |      |                                  |  Beneficially     |(D)or |                           |
                           |      |    | |                  | A/|           |  Owned at         |Indir |                           |
                           | Date |Code|V|    Amount        | D |    Price  |  End of Month     |ect(I)|                           |
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Common Stock, par value $.0|08/20/|P   | |10,000            |A  |$8.625     |269,267*           |D     |                           |
1 per share                |97    |    | |                  |   |           |                   |      |                           |
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 Table II -- Derivative Securitites Acquired, Disposed of, or Beneficially Owned                                                   |
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1.Title of Derivative |2.Con-  |3.   |4.    |5.Number of De |6.Date Exer|7.Title and Amount  |8.Price|9.Number    |10.|11.Nature of|
  Security            |version |Transaction | rivative Secu |cisable and|  of Underlying     |of Deri|of Deriva   |Dir|Indirect    |
                      |or Exer |     |      | rities Acqui  |Expiration |  Securities        |vative |tive        |ect|Beneficial  |
                      |cise    |     |      | red(A) or Dis |Date(Month/|                    |Secu   |Securities  |(D)|Ownership   |
                      |Price of|     |      | posed of(D)   |Day/Year)  |                    |rity   |Benefi      |or |            |
                      |Deriva- |     |      |               |Date |Expir|                    |       |ficially    |Ind|            |
                      |tive    |     |      |           | A/|Exer-|ation|   Title and Number |       |Owned at    |ire|            |
                      |Secu-   |     |    | |           | D |cisa-|Date |   of Shares        |       |End of      |ct |            |
                      |rity    |Date |Code|V|  Amount   |   |ble  |     |                    |       |Month       |(I)|            |
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Stock Option (Right to|n/a     |01/04|    | |           |   |**   |01/04|Common Stock|20,144 |$0.19  |20,144      |D  |            |
 Buy)                 |        |/94  |    | |           |   |     |/04  |            |       |       |            |   |            |
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Stock Option (Right to|n/a     |07/23|A   |V|100,000    |A  |***  |07/23|Common Stock|100,000|$11.00 |100,000     |D  |            |
 Buy)                 |        |/97  |    | |           |   |     |/07  |            |       |       |            |   |            |
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                      |        |     |    | |           |   |     |     |            |       |       |            |   |            |
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Explanation of Responses:
* Subsequent to the date of the reporting person's most recent previous 
ownership statement, the reporting person 
transferred 226,351 shares of the Issuer's Common Stock to the reporting 
person's former wife pursuant to a 
domestic relations order.  Additionally, no fractional shares of Common Stock 
were issued in connection with either 
the conversion of the previously outstanding shares of the Issuer's Senior 
Redeemable Convertible Preferred Stock, 
Series C, par value $.01 per share (the "Series C Preferred") or the exercise 
of warrants to purchase Series C 
Preferred.  As a result, the reporting person's most recent previous ownership 
report reflected ownership of six 
(6) shares of Common Stock never issued to the reporting 
person.
**  On January 4, 1994, the reporting person was granted an option to purchase 
20,144 shares of Common Stock 
(as adjusted for the .517-to-1 reverse stock split occuring in connection with 
the Issuer's initial public offering of 
Common Stock), pursuant to the Issuer's 1994 Stock Option Plan, as amended.  As 
of August 31, 1997, 18,045 
shares subject to the option had vested.  The remaining shares will vest at the 
rate of 2.084% of the aggregate 
number of shares subject to the option at the end of each of the next 
succeeding five months.
***  On July 23, 2997, the reporting person was granted an option to purchase 
100,000 shares of Common Stock 
pursuant to the Issuer's 1994 Stock Option Plan, as amended.  The shares 
subject to the option will vest at the rate 
of 25% of the aggregate number of shares subject to the option on each of the 
first and second anniversary of the 
date of the option grant and thereafter the shares subject to the option will 
vest monthly at the rate of 2.084% at the 
end of each of the next succeeding 24 
months.
SIGNATURE OF REPORTING PERSON
/s/ C. Eugene Ennis
DATE
September 10, 1997