Table 2. Typical Power Requirements by Product Category After all the exploratory analyses, drilling determines whether the exploration geophysicist has accurately located the reservoir (exploratory drilling) and whether the sites chosen...

Crude oil generally appears as a dark-colored liquid. It is found underground under pressure and therefore wells must be drilled in order to bring it to the surface. Part of the crude oil is in the form of a gas. The latter separates out from...

Exploration for oil and gas has evolved from a basic trial-and-error drilling to the application of sophisticated geophysical techniques to predict the best locations for drilling. Oil and gas are usually associated with sedimentary rocks. The three...

The terms oil production and gas production refer to rates of extraction of liquid and gaseous hydrocarbon materials from natural underground deposits. Reserves and resources, on the other hand, refer to amounts of oil and gas that are present in...

Petroleum is a naturally occurring liquid oil normally found in deposits beneath the surface of the earth. It is a type of oil composed of rock minerals, making it different from other kinds of oils that come from plants and animals (such as vegetable...

Petroleum is a term that includes a wide variety of liquid hydrocarbons. Many scientists also include natural gas in their definition of petroleum. The most familiar types of petroleum are tar, oil, and natural gas. Petroleum forms through the...

Petroleum is a complex mixture of hydrocarbon compounds, usually containing impurities such as nitrogen, oxygen, sulfur, and small quantities of trace metals. The name petroleum comes from the Latin words for rock and oil, because petroleum was first...

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 called crude oil, but as a technical term it also includes natural gas and the viscous or solid form...

Petroleum Overview Petroleum (peh-TRO-lee-yum) is a mixture, not a compound. Mixtures differ from compounds in a number of important ways. The parts that make up a mixture are not chemically combined with each other, as they are in a compound. Also,...

Petroleum has become steadily more useful and valuable since the first oil well was drilled by Edwin Drake (1819-1880) in 1859. The first major oil fields were discovered in Pennsylvania and Ohio, with major strikes in Texas and Oklahoma to follow in...

The process of oil recovery is essentially the process of getting oil from the places where oil exists in the ground (whether onshore or offshore) and into processing plants for refining so the oil is suitable for industrial and residential purposes....

From the dawn of time up through the late 1800s, economic development depended largely on the strength of man, animal, and to limited use water, wind, and steam. Economic conditions progressed from clans of primitive gatherers to reasonably advanced...

Microorganisms play an important role in the formation, recovery, and uses of petroleum. Petroleum is broadly considered to encompass both oil and natural gas. The microorganisms of concern include bacteria and fungi. Much of the experimental...

Petroleum microbiology is a branch of microbiology that is concerned with the activity of microorganisms in the formation, recovery, and uses of petroleum. Petroleum is broadly considered to encompass both oil and natural gas. The microorganisms of...

Petroleum is a complex mixture of solid, liquid, and gaseous hydrocarbons normally found a few miles beneath the earth's surface. It, along with coal and natural gas, is one of the fossil fuels. That name comes from the most common scientific...

Complex mixture of hydrocarbons derived from the geologic transformation and decomposition of plants and animals that lived hundreds of millions of years ago. As a technical term, petroleum encompasses the liquid (crude oil), gaseous (natural gas), and...

Another name for CRUDE OIL although the term strictly includes both crude oil and natural gases containing hydrocarbons. The name petroleum literally means ‘oil from rock’. It consists primarily of hydrocarbons although around 10 per cent...

mixture of comparatively volatile liquid hydrocarbons (compounds composed mainly of hydrogen and carbon with some nitrogen, sulfur, and oxygen) that occurs in the Earth's crust and is extracted for use as fuel and various petroleum products. Because...

A naturally occurring bituminous liquid containing a complex mixture of organic chemicals. It is a fossil fuel and was formed between 100–200 million years ago. It is derived from the decomposition of organic material, principally microscopic...

Petroleum (Latin Petroleum f. Greek πέτρα (Latin petra) - rock + έλαιον (Latin oleum) - oil) or crude oil is a naturally occurring liquid found in formations in the Earth consisting of a complex mixture of hydrocarbons (mostly alkanes) of...