Method of altering the permeability of a hydrocarbon-containing

Compositions – Leather or fur treating

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166310, 405263, C09K 300, E02D 312

Patent

active

046171320

ABSTRACT:
A method of reducing the permeability to water of a subterranean geological formation containing sandstone. The method is carried out by contacting the formation with an aqueous mixture comprising a water-soluble anionic polymer having a molecular weight greater than 100,000 and subsequently contacting the anionic polymer with a polymer stabilizing fluid comprising a water-soluble cationic polymer having a molecular weight greater than 1,000.

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