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

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 appraisal well on the Ca Ngu Vang ("CNV") structure on Block 9-2 offshore Vietnam, the CNV-4X ST, has tested at a maximum combined rate of approximately 7,050 barrels of crude oil equivalent per day comprised of approximately 5,333 barrels of crude per day and approximately 10.3 million cubic feet of gas per day.

The open hole test was conducted over a 13 hour period from a Basement interval of approximately 1,350 metres. Drilling operations recommenced on 5 June 2006 into the "D" fault block of the CNV structure. The well was a re-entry and sidetrack into the CNV-4X, which had to be suspended in December 2005 when it encountered an oil and gas interval with unexpected high pressure in the Oligocene "E" Sequence just above the Granitic Basement. Log analysis of the Oligocene "E", when penetrated by this well, indicated that the interval lacked permeability. The CNV-4X ST was drilled to a measured depth ("MD") of 6,330 metres making it the longest MD well to be drilled in Vietnam, exceeding the previous record set by the Hoan Vu Joint Operating Company when it drilled the CNV-3X appraisal well in 2005.

The well will be suspended as a producer and this rig will be released from the Vietnam drilling programme. A Declaration of Commerciality was made on the CNV field earlier this year and an Outline Development Plan was subsequently approved. We are proceeding with procurement of long lead time items, including the contracting of an additional rig to the rig already under contract that is expected to begin development drilling on the CNV structure in the second quarter of 2007.

Ed Story, President and Chief Executive of SOCO, commented:

"The results of the CNV-4X ST further buttress the attractive economics of the Ca Ngu Vang field by adding reserves and additional productive capacity. The development planning of this field is well underway. The success of the CNV-4X ST well is particularly gratifying when one considers the difficult drilling environment that had to be overcome. Once again the technical competence of our team has been demonstrated as they exceeded their previous drilling record."

9 October 2006


ENQUIRIES:


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

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 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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