In situ application of high temperature resistant surfactants to produce water continuous emulsions for improved crude recovery

摘要

A process for recovering oil from a subterranean hydrocarbon- bearing reservoir having a hydrocarbon and penetrated by a wellbore. The process comprises injecting through the wellbore and into the subterranean hydrocarbon-bearing reservoir an emulsifying composition containing an aqueous phase and a minor amount of an emulsifying agent such that the emulsifying composition contacts at least a portion of the hydrocarbon to form an oil-in-aqueous phase emulsion within the subterranean hydrocarbon- bearing reservoir.