Oil recovery by surfactant waterflooding with hydrocarbyl...

Details Oil recovery by surfactant waterflooding with hydrocarbyl... Oil recovery by surfactant waterflooding with hydrocarbyl...

C - Chemistry, Metallurgy

09

K

31/16

C09K 3/00 (2006.01) C09K 8/584 (2006.01)

Patent

CA 1089213

OIL RECOVERY BY SURFACTANT WATERFLOODING WITH HYDROCARBYL AMINO ETHER-LINKED ALKANE SULFONATES Abstract of the Disclosure A surfactant waterflooding process employing an anionic surfactant for use in oil reservoirs in which the connate waters exhibit high salinities and/or divalent metal ion concentrations in situations in which the available waters exhibit high salinities and/or divalent metal ion concentrations. The anionic surfactant comprises a hydrocarbyl amino ether-linked alkane sulfonate in which the hydrocarbyl group provides a lipophilic base and in which the ether linkage is provided by an alkoxy linkage having a ratio of carbon atoms to oxygen atoms within the range of 2 to 3. The surfactant may be a monosulfonate or disulfonate and may be employed alone or in conjunction with other additives. Thus it may be employed as a cosurfactant in combination with other anionic or nonionic surfactants or in combination with alcohols which function as surfactant cosolvents. -1-

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