Oil

The term oil is often used to refer in a general way to the fossil fuel petroleum, or to the other fuels that petroleum yields when it is purified and distilled. Petroleum is an oily, flammable, liquid mixture of hydrocarbons and traces of other substances. It may range in color from almost clear to black. It is also called crude oil. It lies under pressure within porous rock formations in the ground (commonly within specific rock formations known as anticlines). After geologists have identified areas where it is likely to be found, test wells are drilled and oil fields are developed. Oil-bearing rock formations usually lie underneath a layer of natural gas and above a layer of salt water; when these formations are drilled, pressure causes the layers of natural gas and water to expand and push the oil to the surface so that it collects in a well. When insufficient amounts of natural gas remain to allow the oil to be drawn out, drillers add pumps to pull it up. It can take up to a decade before a field of oil is developed and producing significant quantities of oil, but pumps allow the oil to flow quite freely for years or even decades, until the flow decreases and the oil field is depleted.

Was this article helpful?

0 0
Guide to Alternative Fuels

Guide to Alternative Fuels

Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.

Get My Free Ebook


Post a comment