BANGKOK (Reuters) - Southeast Asian oil refiners are expected to reap benefits from a surge in refining margins since the March 11 earthquake and tsunami in Japan.
Here are some facts about major oil refiners in Southeast Asia.
Singapore is a key regional supply and trading center. Major refineries in Singapore are operated by global oil firms such as Exxon Mobil (XOM.N) and Royal Dutch Shell (RDSa.L).
Exxon Mobil's Singapore Refinery operates at two sites with a combined capacity of 605,000 barrels per day (bpd).
Shell's 500,000 bpd Bukom refinery is the largest Shell refinery in the world in terms of crude distillation capacity.
Malaysia has five active oil refineries with the single largest site belonging to Shell, holding a licensed capacity of 156,000 bpd.
But refineries owned by state oil company Petroliam Nasional Bhd (Petronas)PETR.UL dominate the refining business, operating three sites on the east and west coasts of the country's main peninsula.
Oil refining activity in Malaysia is licensed and controlled by Petronas, which has been vested with the country's oil and gas assets, and is marketed to both domestic and overseas buyers. Exports of oil and gas accounted for 43.3 percent of total exports to Japan in 2010.
Thailand has seven oil refineries with a combined refining capacity of 1.23 million bpd. State-controlled PTT (PTT.BK) has stakes in five of them, giving it about 36 percent of total refining capacity by equity holdings.
Thai Oil (TOP.BK) operates a complex refinery with capacity of 275,000 bpd. It is Thailand's biggest refiner with about 22 percent of the country's refining capacity. It also runs a paraxylene petrochemical plant, with annual capacity of 900,000 tones of diversified aromatics products.
State oil firm Pertamina owns Cilacap refinery, which has a total capacity of 348,000 bpd.
Excluding the facilities of ExxonMobil and Shell in Singapore, Pertamina's Cilacap refinery is Southeast Asia's largest in terms of capacity.
Indonesia, Asia's largest gasoline buyer, does not have enough refineries to meet its fuel needs and relies on gasoline and diesel imports.
Petron Corp (PCOR.PS), the country's top oil firm, operates a 180,000 bpd refinery in Bataan, northwest of Manila. Petron, with a market value of $3.2 billion and controlled by local conglomerate San Miguel Corp (SMC.PS), buys most of its crude from Saudi Arabia.
Vietnam has one refinery, Dung Quat, owned by state oil monopoly Petrovietnam. It has capacity of 130,500 bpd.
Vietnam is aiming for fuel self-sufficiency by developing total annual refining capacity of 25 million to 30 million tones (about 600,000 bpd) by 2020.
(Compiled by Khettiya Jittapong; Editing by Alan Raybould)