BHP Billiton is a global resources company. Co. operates under a Dual Listed Company (DLC) structure, which consists of the BHP Billiton Limited Group and the BHP Billiton Plc Group, operating as a single economic entity. As of June 30 2017, Co. operated four reportable segments: Petroleum, which is involved in the exploration, development and production of oil and gas; Copper, which is involved in the mining of copper, silver, lead, zinc, molybdenum, uranium and gold; Iron ore, which is involved in the mining of iron ore; and Coal, which is involved in the mining of metallurgical coal and thermal (energy) coal.

BHP Billiton is a resources company. Co. extracts and processes minerals, oil and gas, primarily in Australia and the Americas. Co. operates four reportable segments: Petroleum, which is engaged in the exploration, development and production of oil and gas; Copper, which is engaged in the mining of copper, silver, lead, zinc, molybdenum, uranium and gold; Iron Ore, which is engaged in the mining of iron ore; and Coal, which is engaged in the mining of metallurgical coal and energy coal. Co.'s Petroleum unit comprises conventional and unconventional oil and gas assets, and includes exploration, development and production activities.

Woodside Petroleum is engaged in hydrocarbon exploration, evaluation, development, production and marketing. Co.'s operating segments include: North West Shelf Project, which is engaged in the exploration, evaluation, development, production and sale of liquefied natural gas, pipeline natural gas, condensate, liquefied petroleum gas and crude oil from the North West Shelf ventures; Pluto LNG, which is engaged in the exploration, evaluation, development, production and sale of liquefied natural gas and condensate in assigned permit areas; Australia Oil; Browse FLNG; and Wheatstone LNG. As of Dec 31 2015, Co. had proved reserves of 1.15 billion barrels of oil equivalent.