Foaming acid-containing fluids

Details Foaming acid-containing fluids Foaming acid-containing fluids

E - Fixed Constructions

21

B

31/14, 149/19

E21B 43/27 (2006.01) C09K 13/04 (2006.01) E21B 37/00 (2006.01)

Patent

CA 1280883

ABSTRACT OF THE DISCLOSURE Foamed treating fluids contain an acid component, a gas, optionally an organic solvent and emulsifying agent, and, as a foaming agent, a mixture of a quaternary ammonium halide cationic surface active agent and either an alkylamine alkylamine oxide surface active agent or a betaine amphoteric surface active agent. Such treating fluids can be used to dissolve acid-soluble components from various surfaces, such as a subterranean reservoir penetrated by a well, the well itself, or an industrial vessel or conduit containing a scale.

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