Vietnam's fourth largest oilfield, a $1 billion offshore project, has gone into production, UPI quoted the operating company 'Cuu Long' as announcing. Cuu Long, a joint venture, said the Su Tu Vang (Golden Lion) oilfield is expected to have an output of about 65,000 barrels a day, Vietnam News said. The oilfield is located off the Vietnamese coast southeast of Ba Ria-Vung Tau Province.