Foaming agents for use in coal seam reservoirs

Details Foaming agents for use in coal seam reservoirs Foaming agents for use in coal seam reservoirs

C - Chemistry, Metallurgy

09

K

C09K 8/68 (2006.01) C09K 8/594 (2006.01) C09K 8/80 (2006.01) E21B 43/26 (2006.01) E21B 43/267 (2006.01)

Patent

CA 2597137

A well treatment fluid composition that comprises a carrier fluid and an amphoteric surfactant, and optionally a viscosifying agent and proppant, is well suited for use in fracturing coal beds to stimulate methane production. The composition preferably is a foam that comprises a gas such as nitrogen or air. Preferably, the surfactant has formula R-NH2- (CH2) n-C (O) OX, wherein R is a saturated or unsaturated alkyl group having from 6-20 carbon atoms, n is from 2-6, and X is hydrogen or a salt forming cation.

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