South Korean builder SK Engineering & Construction Co. said Monday that it has clinched a US$1.1 billion contract to build an oil refinery facility in Saudi Arabia. South Korea\'s (Yonhap) News Agency said that under the deal with the state-run oil company Saudi Aramco, SK E&C will build an oil refinery plant with a daily capacity of 400,000 barrels of crude and a terminal to ship the petrochemical products in Jazan Economic City in southwestern Saudi Arabia.