Enhanced Oil Recovery (abbreviated EOR) is a generic term for techniques for increasing the amount of crude oil that can be extracted from an oil field. Enhanced oil recovery is also called improved oil recovery or tertiary recovery (as opposed to primary and secondary recovery). Sometimes the term quaternary recovery is used to refer to more advanced, speculative, EOR techniques. Using EOR, 30 to 60 percent or more of the reservoir's original oil can be extracted, compared with 20 to 40 percent using primary and secondary recovery.
There currently are several different methods of Enhanced Oil Recovery.
Read more about Enhanced Oil Recovery: Terms, Gas Injection, Miscible Solvents, Thermal Methods, Economic Costs and Benefits, Examples of Current EOR Projects, Potential For EOR in United States, Environmental Impacts
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