Addition of nonionic surfactants to water soluble block...

Details Addition of nonionic surfactants to water soluble block... Addition of nonionic surfactants to water soluble block...

E - Fixed Constructions

21

B

E21B 43/26 (2006.01) C09K 8/60 (2006.01) C11D 3/37 (2006.01)

Patent

CA 2704177

An aqueous fluid useful for the recovery of crude oil from a subterranean formation, which includes a composition including a mixture of water, a water soluble block copolymer, an inorganic salt and at least one member of the group of a nonionic surfactant having an HLB of less than 12, and methods for using same.

Fluide aqueux convenant pour la récupération de brut dans une formation souterraine, lequel fluide comprend une composition constituée d'un mélange d'eau, d'un copolymère bloc hydrosoluble, d'un sel inorganique et d'au moins un élément du groupe de tensioactifs non ioniques avec un rapport hydrophile-lipophile (HLB) inférieur à 12, et ses méthodes d'utilisation.

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