Wellbore treatment compositions containing foam extenders...

Details Wellbore treatment compositions containing foam extenders... Wellbore treatment compositions containing foam extenders...

C - Chemistry, Metallurgy

09

K

C09K 8/70 (2006.01) C09K 8/518 (2006.01) C09K 8/60 (2006.01)

Patent

CA 2618394

This invention relates to fluid compositions used in treating a subterranean formation. In particular, the invention is aqueous wellbore treatment compositions which are foams containing a viscosifying agent, a foam extender, a gas component, and a surfactant, as well as methods of forming such fluids, and uses thereof. The viscosifying agent may be a hydratable polymer, viscoelastic surfactant, or heteropolysaccharide. The foam extender may be a material such as a polyoxyalkyleneamines, ethylenepolyamines, tertiary polyamines, bicarbonate, carbonate, phosphate, or sesquicarbonate.

Cette invention concerne des compositions fluides utilisées pour traiter une formation souterraine. Plus particulièrement, cette invention concerne des compositions de traitement de puits de forage aqueuses, lesquelles compositions sont des mousses qui contiennent un agent viscosifiant, un épaississant de mousse, un composant à base de gaz et un tensioactif. Cette invention concerne également des procédés permettant de réaliser de tels fluides ainsi que des procédés permettant de les utiliser. L'agent viscosifiant peut être un polymère pouvant être hydraté, un tensioactif viscoélastique ou un hétéropolysaccharide. L'épaississant de mousse peut être un matériau tel que des polyoxyalkylèneamines, des éthylènepolyamines, des polyamines tertiaires, du bicarbonate, du carbonate, du phosphate, ou du sesquicarbonate.

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