Oil recovery by microemulsion injection

Details Oil recovery by microemulsion injection Oil recovery by microemulsion injection

E - Fixed Constructions

21

B

166/31, 166/33

E21B 43/22 (2006.01) C09K 8/584 (2006.01)

Patent

CA 1037861

OIL RECOVERY BY MICROEMULSION INJECTION Abstract of the Disclosure A process for the recovery of oil from a subterranean oil reservoir involving the injection of a microemulsion comprising neutralized organic acids extracted from a petroleum oil, oil, and a co-surfactant having mutual solubility for oil and water. The microemulsion may be injected in two portions with the terminal portion having lower concentrations of oil and co-surfactant than the initial portion. The neutralized organic acids employed in the microemulsion may be produced by the alkaline extraction of a petroleum oil. The microemulsion may also contain an alkyl aryl sulfonate, an alkaline agent, and a monovalent salt. -1-

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