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Petroleum is a naturally occurring, yellow-to-black liquid found in geological formations beneath the Earth's surface, which is commonly refined into various ...

Petroleum | Information on Petroleum and Crude Oil


Petroleum or crude oil is a fossil fuel. Find out how petroleum was formed and a history of its development into the oil products we see today.

What Is Petroleum? - AAPG Home


There are some places on earth where oil is not trapped underground, but actually seeps out at the earth's surface—Think Jed Clampett and a "bubbling crude!

Petroleum | Define Petroleum at Dictionary.com


Petroleum definition, an oily, thick, flammable, usually dark-colored liquid that is a form of bitumen or a mixture of various hydrocarbons, occurring naturally in ...

Petroleum & Other Liquids - U.S. Energy Information Administration ...


Petroleum & Other Liquids ... U.S. petroleum product exports continue to increase ... Iran's petroleum production expected to increase as sanctions are lifted.

Oil: Crude and Petroleum Products - Energy Explained, Your Guide ...


Petroleum products are fuels made from crude oil and other hydrocarbons contained in natural gas. Petroleum products can also be made from coal, natural gas ...

Petroleum Economist


Publishing an energy and power journal, a portfolio of global and regional maps, and a series of books and reports. Residential and in-house training courses.

petroleum | Britannica.com


Petroleum, complex mixture of hydrocarbons that occur in the Earth in liquid, gaseous, or solid forms. The term is often restricted to the liquid form, commonly ...



The American Petroleum Institute (API) is the only national trade association that represents all aspects of America's oil and natural gas industry. Our more than ...

Petroleum - College of Earth and Mineral Sciences


The formation of petroleum. Text Box: Modified from Tissot and Welte, 1984. Petroleum formation and occurrence, Step 1: Diagenesis forms Kerogen.

Petroleum, or crude oil, is a smelly, yellow-to-black liquid and is usually found in underground areas called reservoirs.
Oil was formed from the remains of animals and plants (diatoms) that lived millions of years ago in a marine (water) environment before the dinosaurs.