Declaration of Commerciality

Soco International PLC
25 April 2006




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

             Declaration of Commerciality for the Ca Ngu Vang Field


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 and
the Republic of Congo with production operations in Yemen.


The Hoan Vu Joint Operating Company ('HVJOC') today acknowledged the receipt of
unanimous approval of the Declaration of Commerciality on the Ca Ngu Vang 
('CNV') field on Block 09-2, offshore Vietnam, by the shareholders of the HVJOC.



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


'The Declaration of Commerciality for the Ca Ngu Vang oil field is the first
affirmation of the commercial success of our exploration efforts in Vietnam.  We
are confident that there will be more to follow in this oil rich exploration
province consisting of multiple, extensive high quality productive reservoirs.'



                                                                   25 April 2006


ENQUIRIES:


SOCO International plc
Roger Cagle               Deputy Chief Executive and      Tel: [phone]
                          Chief Financial 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').  SOCO Vietnam
holds a 25% working interest in Block 9-2, which is operated by the Hoan Vu
Joint Operating Company and a 28.5% working interest in Block 16-1, which is
operated by the Hoang Long Joint Operating Company.



                      This information is provided by RNS
            The company news service from the London Stock Exchange