Marine XI Farm-out Agreement

Soco International PLC
06 September 2006


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

                          Marine XI Farm-out Agreement

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.

The Company announces that its subsidiary, SOCO Exploration and Production Congo
('SOCO EPC'), has entered into a farm-out agreement wherein it has agreed to
farm-out 18.75% of its interest in the Marine XI block, offshore the Republic of
Congo (Brazzaville), to each of a subsidiary of Lundin Petroleum AB and Raffia 
Oil SARL. SOCO EPC will remain as the operator with a 37.5% working interest in 
the block.  The exploration and production branch of SNPC (15%) and Africa Oil & 
Gas Corporation (10%) hold the remaining interests.

The block, located in the Lower Congo Basin, is in shallow water adjacent to the
coast with water depths ranging up to 110 metres and covers approximately 1,400
square kilometres.  There has been previous exploration activity on the block
resulting in four small oil discoveries, the largest of which has initial
recoverable reserves estimated to be in the 30 to 60 million barrel range. A
contract has been awarded to PGS Overseas AS for the acquisition of a 1,200
square kilometre 3D seismic programme.  The Ramform Explorer is expected to
begin acquisition in early October.

The assignment of interests in the Agreement is subject to approval of the
appropriate regulatory authorities of the Government of the Republic of Congo
(Brazzaville).

06 September 2006

ENQUIRIES:

SOCO International plc
Roger Cagle, Deputy Chief Executive and Chief Financial Officer
Tel: [phone]

Pelham Public Relations
James Henderson, Tel: [phone]
Alisdair Haythornthwaite, Tel: [phone]



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