Oil Search Limited explores for, develops, and produces oil and gas properties primarily in Papua New Guinea, the United States, and Australia. It operates through PNG Business Unit and Alaska Business Unit segments. The company is involved in the exploration, development, production, and sale of hydrocarbons, liquefied natural gas, crude oil, natural gas, condensate, naphtha, and other refined products; and power generation activities. As of December 31, 2020, its proved and probable reserves, and contingent resources comprised approximately 547.2 million barrels of oil and condensate; and 3,956.4 billion cubic feet of gas. The company was incorporated in 1929 and is based in Port Moresby, Papua New Guinea.