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


Wholesale spot petroleum prices, 5/26/2016 close. Product, Area, Price, % change*. Crude Oil ($/barrel), WTI, 49.00, -0.2. Brent, 49.52, +1.3. Louisiana Light  ...

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 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.



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 ...

Energy Intelligence Group | information services - Petroleum ...


Petroleum Intelligence Weekly (PIW) has been setting the standard for international energy journalism for five decades. PIW's mission is to provide the analytical ...

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 ...

Petroleum | Definition of Petroleum by Merriam-Webster


a kind of oil that comes from below the ground and that is the source of gasoline and other products. Source: Merriam-Webster's Learner's Dictionary.

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.