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

SOCO is an international oil and gas exploration and production company, headquartered in London. The Company has continuing interests in Vietnam, Yemen, Mongolia, Libya and Thailand with ongoing production operations in Yemen and Mongolia. As announced on 1 April 2005, SOCO has agreed to dispose of its Mongolian operations, subject to gaining approval from its shareholders.

The Company's majority owned subsidiary, Comeco Petroleum, Inc. ("Comeco"), through which the Company holds a 16.785% interest in the East Shabwa Development Area in Yemen ("ESDA"), announces the successful production test of the KHA-404. The well was drilled as part of the continuing appraisal and development of the Basement reservoir in the Kharir Field.

The KHA-404 spudded on 1st February 2005 and reached a total depth of 3,539 metres. The objectives of the well were to delineate the Basement and evaluate reservoir development in the northern extension of the structure. KHA-404 produced over 5,500 barrels of oil per day ("BOPD") when tested earlier this week and is now connected to Kharir's main production facilities. This marks the third consecutive success of the four wells drilled thus far in the programme initiated in August 2004 to evaluate the Basement reservoir in the Kharir Field. After the first well, KHA-401 was suspended for a technical review, the KHA-402 well tested at 550 BOPD and the KHA-403 tested at over 6,500 BOPD.

The fifth Basement well in the current ESDA drilling programme, the KHA-405, spudded on 28th March 2005.

7 April 2005


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

College Hill
Tel: 020 7457 2020
Ben Brewerton
Nick Elwes


Comeco, in which SOCO holds a 58.75% interest, has a 28.57% interest in the ESDA in Block 10 in Yemen. The East Shabwa joint venture is operated by TOTAL Yemen, S.A. (28.57% interest) under a production sharing agreement with the government of Yemen. The other joint venture partners are Occidental Yemen Ltd. (28.57% interest) and Kuwait Foreign Petroleum Exploration Co. (14.29% interest).

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