(EnergyAsia, April 29) — Talisman Vietnam 15-2/01 Ltd, a wholly-owned subsidiary of Canadian upstream company Talisman Energy Inc, and PetroVietnam Exploration and Production Company, a subsidiary of Vietnam Oil and Gas Corporation, have signed a petroleum contract for offshore Block 15-2/01 in Vietnam. Talisman Vietnam 15-2/01 Ltd has a 60% interest in the block with…