E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/22 (2006.01) B01F 17/00 (2006.01) C09K 8/584 (2006.01)
Patent
CA 2412697
The present invention relates to an aqueous fluid useful for the recovery of a liquid hydrocarbon from subterranean reservoirs comprising an aqueous media and a surfactant blend. The aqueous fluid has an alkaline pH. The surfactant blend comprises at least one synthetic polyisobutylene surfactant and at least one secondary surfactant selected from the group consisting of sulfonate surfactants, alcohols and nonionic surfactants. The surfactant blend lowers the interfacial tension between hydrocarbon oil and the aqueous fluid.
La présente invention concerne un fluide aqueux utile dans la récupération d'un hydrocarbure liquide situé dans des réservoirs souterrains, comprenant un milieu aqueux et un mélange de tensio-actifs. Le fluide aqueux a un pH alcalin. Le mélange de tensio-actifs comprend au moins un tensio-actif synthétique à base de polyisobutylène et au moins un tensio-actif secondaire sélectionné dans le groupe comprenant des tensio-actifs de sulfonate, des alcools et des tensio-actifs non ioniques. Le mélange de tensio-actifs permet de réduire la tension interfaciale entre l'hydrocarbure liquide et le fluide aqueux.
Feuerbacher David G.
Hou Peter Wanggi
Akzo Nobel Surface Chemistry Pte. Ltd.
Crompton Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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