The crude oil and natural gas extraction industry (SIC 1311) comprises establishments engaged in operating oil and gas fields. Activities include exploration for crude oil and natural gas; drilling, completing, and equipping wells; and all other activities involved in making crude oil and natural gas marketable, up to the point of shipment from the producing property. This industry also includes the mining and extraction of oil from oil shale and oil sands, and the production of liquid hydrocarbons and natural gas.

File last modified: November 5, 1997

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