Method for modifying the permeability of an underground formatio

Details Method for modifying the permeability of an underground formatio Method for modifying the permeability of an underground formatio

1990-09-04

1992-04-07

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166274, 166275, E21B 33138, E21B 4322

Patent

active

051019035

ABSTRACT:
A method is disclosed for reducing the permeability of the more permeable zone of an underground formation having nonuniform permeability, the method comprised of injecting into the formation a blend comprised of a surfactant and an alcohol, said blend introduced in an amount effective to reduce the permeability of the more permeable zone of the formation. The preferred surfactant is an amine oxide, most preferably dimethyltallowamine oxide, delivered in water. The preferred alcohol is isopropanol. The disclosed method may optionally comprise the further step of injecting an alcohol slug following injection of the surfactant and alcohol blend.

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