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1. (WO2018146507) SURFACTANT FOR ENHANCED OIL RECOVERY

Pub. No.:    WO/2018/146507    International Application No.:    PCT/IB2017/000232
Publication Date: Fri Aug 17 01:59:59 CEST 2018 International Filing Date: Wed Feb 08 00:59:59 CET 2017
IPC: C09K 8/584
C09K 8/594
Applicants: TOTAL SA
Inventors: CUI, Leyu
BOURREL, Maurice
DUBOS, Fabienne
KLIMENKO, Alexandra
Title: SURFACTANT FOR ENHANCED OIL RECOVERY
Abstract:
The invention relates to a method of extracting hydrocarbons from a subterranean formation, comprising: - injecting a surfactant composition into the subterranean formation, and - collecting hydrocarbons displaced by the injected surfactant composition; wherein the surfactant composition comprises at least one surfactant compound of formula (I) wherein x is an integer from 0 to 3, R1, R2, R3, R4 and each R are independently a hydrogen atom or an alkyl group, each A is an alkylene group, and the total number of carbon atoms in the surfactant compound of formula (I) is from 10 to 21. The invention also relates to a composition comprising liquid or supercritical carbon dioxide and at least one surfactant compound of formula (I).