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- W296596339 abstract "This paper summarizes results of our basic study of coalescence phenomena, emulsion formation and stability, and dynamic interfacial properties when crude oils are contacted with aqueous solutions of surfactant/polymer and alkaline agents. These measurements are correlated with each other and with observations on oil bank formation and displacement and recovery efficiency by chemical flooding in microwave monitored core flooding experiments using the soluble oil and the aqueous surfactant systems. Cinephotomicrographic observations into the mechanism of tertiary oil displacement were conducted in a model porous medium. These observations suggest that in situ formation of stable emulsions severely detracts from a successful surfactant/polymer recovery process and that the slowly coalescing system leaves more reentrapped oil behind. The beneficial role of alcohols or cosolvents in tertiary oil recovery is discussed. The acidic crude oil from California has been fractionated, and the dynamic interfacial behavior of each fraction has been examined and compared with that of the whole crude. Acidic resins naturally occurring in crudes have been found to be responsible for a variety of interfacial phenomena in acidic oil-aqueous alkaline systems. Microwave monitored core flooding tests have been conducted using the two acidic crude oils versus sodium hydroxide and sodium orthosilicate systems. Inmore » addition, microvisual observations of the mechanisms of tertiary oil displacement have been made. It has been concluded that oil swelling in addition to interfacial tension, emulsification phenomena and wettability reversal may be a major contributing factor in the alkaline stimulated oil recovery processes. 9 figures, 2 tables.« less" @default.
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- W296596339 date "1982-01-01" @default.
- W296596339 modified "2023-09-27" @default.
- W296596339 title "Oil banking phenomena in surfactant/polymer and caustic flooding: droplet coalescence and entrapment processes" @default.
- W296596339 hasPublicationYear "1982" @default.
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