Methods and compositions for acid treating subterranean formatio

Details Methods and compositions for acid treating subterranean formatio Methods and compositions for acid treating subterranean formatio

1988-01-06

1988-10-04

Suchfield, George A.

Wells

Processes

Placing fluid into the formation

166282, 252 8553, E21B 4327

Patent

active

047750103

ABSTRACT:
Methods and compositions for acid treating subterranean formations penetrated by well bores are provided. The compositions are each comprised of an aqueous acid solution, one or more acrylamide polymers dissolved in the acid solution, a liquid hydrocarbon dispersed in the acid solution, and one or more nonionic surface active agents having at least one reactive hydroxyl group per molecule. The acrylamide polymer or polymers increase the viscosity of the acid solution and the surface active agent or agents interact with the polymer or polymers whereby stabilized high viscosity results. The subterranean formation acid treating methods of the invention are carried out by introducing the high viscosity acid compositions therein, allowing the compositions to react until spent and recovering the compositions.

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