Oil Search Ltd. engages in the business of oil and gas exploration. It operates through the following segments: PNG Business Unit, Exploration and Other. The PNG Business Unit segment engages in the development, production and sale of liquefied natural gas, crude oil, natural gas, condensate, naphtha and other refined products. The Exploration segment includes exploration and evaluation of crude oil and gas in Papua New Guinea. The Other segment consists of drilling rigs, investment and development towards the group's power strategy and corporate activities. The company was founded in 1929 and is headquartered in Sydney, Australia.