List of petroleum companies
Overview
 
This is a list of selected petroleum
Petroleum
Petroleum or crude oil is a naturally occurring, flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid organic compounds, that are found in geologic formations beneath the Earth's surface. Petroleum is recovered mostly through oil drilling...

 (crude oil) exploration and production companies
in alphabetical order. This list does not included companies involved in refining and marketing only.
 
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