The Western Company of North America

Clarita A Szememyei

Bobby E Hall

A treatment fluid additive and method for treatment of subterranean formations to minimize formation permeability damage as a result of formation contact by the treatment fluid, wherein the fluid treatment additive is a formation control additive of the general formula: ##STR1## wherein R is independently a C.sub.1 to C.sub.4 alkyl, halogen and/or hydroxyl substituted alkyl and at least one R is a C.sub.1 to C.sub.4 halogen or hyroxyl substituted alkyl, and X.sup.- is selected from the group consisting of chloride, fluoride, bromide, iodide, nitrate, nitrite hydroxide, and sulfate.

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The Woodlands, TX, United States of America

Clarita A Szememyei