Alkylxylene sulfonates for enhanced oil recovery processes

Details Alkylxylene sulfonates for enhanced oil recovery processes Alkylxylene sulfonates for enhanced oil recovery processes

2008-01-11

2008-12-23

Kugel, Timothy J. (Department: 1796)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C166S400000, C507S203000, C507S252000, C507S256000, C562S045000, C562S091000

Reexamination Certificate

active

07468343

ABSTRACT:
The present invention is directed to a method for enhancing the recovery of oil from a subterranean reservoir which method employs an alkylxylene sulfonate that contains a high percentage of the 4-alkyl-1,2-dimethyl benzene isomer and a high percentage of alkyl group attachment to the xylene ring at positions higher than the 2-position on the alkyl carbon chain in an aqueous media, since it has surprisingly been discovered that the high percentage of the 4-alkyl-1,2-dimethyl benzene isomer and the high percentage alkyl group attachment to the xylene moiety at positions higher than the 2-position along the alkyl carbon chain on the alkylxylene sulfonate provides an enhanced oil recovery surfactant having low Interfacial Tension. The method optionally employs co-surfactants.

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