The Company's segments include South East Asia and Africa. It has field development and production interests in Vietnam, and exploration and appraisal interests in the Republic of Congo (Brazzaville) and Angola. In Vietnam, SOCO's Block 16-1 and Block 9-2 include the Te Giac Trang and Ca Ngu Vang Fields, which are located in shallow water in the Cuu Long Basin, near the Bach Ho Field. SOCO holds working interest in Block 16-1 and Block 9-2 through its subsidiaries, SOCO Vietnam Ltd and OPECO Vietnam Limited. SOCO holds its interests in the Marine XI Block, located offshore Congo (Brazzaville) in the shallow water Lower Congo Basin, through its subsidiary, SOCO EPC. SOCO holds working interest in the Mer Profonde Sud Block, offshore Congo (Brazzaville) through its subsidiary, SOCO Congo BEX Limited. SOCO's subsidiary, SOCO Cabinda Limited, holds participation interests in the Cabinda North Block.