Foamed treatment fluids and associated methods

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 8/94 (2006.01) C09K 8/38 (2006.01) C09K 8/518 (2006.01) C09K 8/536 (2006.01) C09K 8/575 (2006.01) C09K 8/70 (2006.01) C09K 8/74 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2642244

Foamed treatment fluids comprising water, a gas, and a foaming and foam stabilizing surfactant mixture comprising an alkali salt of an alkyl ether sulfate, wherein the alkali salt of the alkyl ether sulfate comprises an alkali salt of a C6-10 alkyl ether sulfate, and an alkali salt of a C4 alkyl ether sulfate, an alkyl amidopropyl amphoteric surfactant selected from the group consisting of an alkyl amidopropyl hydroxysultaine, an alkyl amidopropyl betaine, and combinations thereof, and an alkyl amidopropyl dimethylamine oxide. Methods comprising providing the foamed treatment fluid and introducing the foamed treatment fluid into a subterranean formation.

La présente invention concerne des fluides de traitement sous forme de mousse qui comprennent de l'eau, un gaz et un mélange de tensioactifs moussants et stabilisateurs de mousse, comprenant un sel alcalin d'un alkyléther-sulfate, ledit sel alcalin de l'alkyléther-sulfate comprenant un sel alcalin d'un alkyléther-sulfate en C6-C10, et un sel alcalin d'un alkyléther-sulfate en C4, ainsi qu'un tensioactif de type alkylamidopropyle amphotère sélectionné au sein du groupe constitué par une alkylamidopropyl-hydroxysultaïne, une alkylamidopropyl-bétaïne et les combinaisons de ces substances, et un alkylamidopropyl-diméthylamine oxyde. La présente invention concerne également des méthodes comprenant l'obtention du fluide de traitement sous forme de mousse et l'introduction du fluide de traitement sous forme de mousse dans une formation souterraine.

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