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Thursday, April 8, 1999                          Contact: Ronald P. Nowak
                                                 or Russell L. Allen
                                                 281-579-3398

                3DX TECHNOLOGIES INC. ANNOUNCES NASDAQ DELISTING



Houston,  Texas - 3DX  Technologies  Inc. (TDXT) today announced that, as of the
close of business on Wednesday,  April 7, 1999,  the Nasdaq Stock Market removed
the Company's  securities  from  conditional  listing on Nasdaq  SmallCap Market
("SmallCap").  The delisting is a consequence of the Company's inability to meet
the minimum bid price for the SmallCap  listing.  The Company expects  immediate
quotation of its securities on the OTC Bulletin Board.

3DX Technologies Inc. is a knowledge-based oil and gas exploration company whose
core  competence and strategic  focus is the  utilization of 3-D seismic imaging
and other  advanced  technologies  in the search for  commercial  quantities  of
hydrocarbons.

Certain statements in this news release regarding future  expectations and plans
for oil and gas  exploration,  development  and  production  may be  regarded as
"forward  looking  statements"  within the meaning of the Securities  Litigation
Reform  Act.  They are  subject to various  risks,  such as  operating  hazards,
drilling risks,  and other  uncertainties  inherent in the business of exploring
for,  developing  and  producing  oil and gas which may be beyond the  Company's
control.  These risks are discussed in detail in the Company's  Annual Report on
Form 10-K for the year ended  December 31, 1998,  as well as other  filings with
the  Securities  and Exchange  Commission.  There can be no  assurance  that the
Company's  exploration  activities  will be  successful in meeting the Company's
expectations.



