Water control well treating solution and method

Details Water control well treating solution and method Water control well treating solution and method

E - Fixed Constructions

21

B

31/21

E21B 43/22 (2006.01) C09K 8/88 (2006.01) E21B 43/32 (2006.01)

Patent

CA 1207517

ABSTRACT A well treating solution is shown for changing the relative permeability of a formation being treated to water. The solution is made by mixing an amphoteric polymeric material, a mutual solvent and a surface active agent in a brine carrier liquid. The well treating solution is injected into the formation at pump rates below the fracture gradient of the formation. The well is briefly shut-in, after which production can be resumed. The treating solution and method taught lower the permeability of the producing formation to water without substantially affecting the formiation's permeability to oil and gas.

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