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Crude Oil

OPEC Definition: Crude oil is technically defined as a mixture of hydrocarbons that exists in the liquid phase in natural underground reservoirs and remains liquid at atmospheric pressure after passing through surface separating facilities. Aside from this definition, crude oil may present itself in a number of forms. It may be viscous or thin, and may be a variety of different colours - depending on the field from which it originates. Crude oil of itself is not particularly useful and does not burn very well - as its name suggests, it requires refinement into petroleum products which are individually more useful....

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by Yue Pan // 11 November, 2015

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