State-owned Vietnam Oil and Gas Corp., known as PetroVietnam, has signed with Mitsubishi and JGC Corp to conduct a feasibility study on a second refinery located 125km south of Hanoi, an official from PetroVietnam has said. Mitsubishi and JGC are to conduct the pre-feasibility study for the USD 2 billion plant and submit it to the government for approval by the end of this year. PetroVietnam is working on designs for the plant, which is expected to start operating by 2005, the national Vietnam news agency reported. The Nghi Son Refinery No. 2 will refine 7 million metric tonnes a year of crude, including Vietnamese and Middle Eastern crude.