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The alkaline–surfactant–polymer flooding using sodium hydroxide as the alkali component to enhance oil recovery at the on shore oil fields at Daqing in China has brought new problems for the oil industry. Even though, the reservoir contained paraffinic crude oil, the alkali added formed stable water-in-crude oil emulsion and de-emulsification process was necessary to separate oil and water.The problems...
This paper is concerned with the study of the effect of the molecular structure of surfactant on the reduction of interfacial tension of Enhanced Oil Recovery (EOR). The interfacial tension behavior of nonane and crude oil with three hexadecylbenzene sulfonate isomers (with benzene rings located at different positions along the alkyl chains) were investigated. It was found that the interfacial tensions...
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