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

The Company's majority owned subsidiary, SOCO Vietnam Ltd., announces that the Te Giac Den ("TGD-IX") well, the first well on the Prospect "E", is currently preparing to set 95/8 inch casing after encountering high pressure in Oligocene sands with oil and gas shows.

Once casing is in place, the well will be drilled to its preliminary total depth near the top of the Basement and evaluated to assess the likelihood of the Basement being charged with hydrocarbons. This initial target is expected to be reached in the next 15 days. A forward programme of further drilling and/or testing will be determined at that time.

High pressure test equipment will not be available until August. Thus, after drilling on this well has been completed, the rig will move to Block 9-2 to drill development wells on the Ca Ngu Vang discovery. If required, TGD-1X will be tested by the Adriatic XI rig, which is expected to be on contract from late June.

4 June 2007


SOCO International plc
Roger Cagle
Deputy Chief Executive and Chief Financial Officer
Tel: 020 7747 2000

Pelham Public Relations
James Henderson, tel: 020 7743 6673
Alisdair Haythornthwaite, tel: 020 7743 6676


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.
SOCO holds its interests in Vietnam, all in the Cuu Long Basin offshore, through its 80% owned subsidiary SOCO Vietnam Ltd. (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 and holds a 28.5% working interest in Block 16-1, which is operated by the Hoang Long Joint Operating Company. OPECO, Inc. holds a 2% interest in Block 16-1.

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