The Thang Long venture operates Vietnam’s offshore Block 15-2, including the Hai Su Trang (White Sealion) and Hai Su Den (Black Sealion) fields.

PTSC said in a statement seen by Reuters announcing the services deal this week that it expected Thang Long to start production form the field by mid-2011.

The Thang Long venture is 60% owned by Canadian independent Talisman, while Petrovietnam's production arm PVEP has the remaining 40%.

Talisman