Preliminary Testing Results

Soco International PLC
14 December 2006


                             SOCO International plc
                           ('SOCO' or 'the Company')

                        TGT-5X Preliminary Test Results

SOCO is an international oil and gas exploration and production company,
headquartered in London, traded on the London Stock Exchange and a constituent
of the FTSE 250 Index. The Company has interests in Vietnam, Yemen, Thailand,
the Republic of Congo (Brazzaville) and the Democratic Republic of Congo
(Kinshasa) with production operations in Yemen.

Further to an announcement earlier today by a PetroVietnam Exploration &
Production Company representative during a symposium in Ho Chi Minh City in
Vietnam, preliminary test results from Miocene Lower Bach Ho 5.2 pay zone in the
TGT-5X appraisal well on the Te Giac Trang ('TGT') structure on Block 16-1
offshore Vietnam yielded approximately 7,300 barrels of oil per day ('BOPD'). An
earlier test from the Oligocene interval in the same well flowed approximately
7,000 BOPD, thus producing a preliminary combined test of more than 14,000 BOPD.

Testing is still underway in the Miocene interval. Final results and details of
both tests will be announced when testing is complete, which is expected to be
later this week.

                                                                14 December 2006

ENQUIRIES:

SOCO International plc

Roger Cagle          Deputy Chief Executive and Chief Financial Tel: [phone]
                     Officer                                    

Pelham Public Relations

James Henderson                                                 Tel: [phone]

Alisdair Haythornthwaite                                        Tel: [phone]


Notes to editors:

SOCO holds its interests in Vietnam, all in the Cuu Long Basin offshore, through
its 80% owned subsidiary SOCO Vietnam Limited (SOCO Vietnam) and through its
100% ownership of OPECO, Inc.. SOCO Vietnam holds a 25% working interest in
Block 9-2, which is operated by the Hoan Vu Joint Operating Company ('HVJOC')
and holds a 28.5% working interest in Block 16-1, which is operated by the Hoang
Long Joint Operating Company ('HLJOC'). OPECO, Inc. holds a 2% interest in Block
16-1.


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