Patent ID: 8470747

Claim:
A method of reducing the viscosity of a viscosified treatment fluid comprising: providing a clean-up composition comprising a carboxylic acid wherein the carboxylic acid comprises a carboxylic acid chosen from the group consisting of: isophthalic acid, terephthalic acid, pamoic acid, thapsic acid, valporic acid, and a mixture of two or more of these; providing a chlorite-based breaker system comprising an alkali metal compound and an activator; and, wherein the activator comprises a metal and an amine; the metal comprising iron, cobalt, or a combination thereof; and, the amine selected from the group consisting of tetraethylenepentamine, butyl amine, ethylene diamine, diethylene triamine, and ethylene diamine hydrogen chloride salt; providing a viscosified treatment fluid; placing the viscosified treatment fluid in a subterranean formation via a well bore penetrating the subterranean formation; contacting the viscosified treatment fluid with the clean-up composition; contacting the viscosified treatment fluid with the chlorite-based breaker system.