Dictionary:Miscible recovery methods

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Enhanced oil recovery (q.v.) methods that involve injecting a fluid that is miscible with oil to increase the effectiveness of the oil’s flow through the reservoir. The three fluids most used are light hydrocarbons, carbon dioxide, and nitrogen. Light hydrocarbons that have been used include natural gas and liquefied petroleum gases (LPG) such as propane, butane, and ethane. Carbon dioxide flooding has been the most promising. Nitrogen flooding has been effective in some circumstances.