Patent ID: 8476202

Claim:
A method of reducing the viscosity of a viscosified treatment fluid comprising: providing a viscosified treatment fluid; 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, valproic 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; placing a viscosified treatment fluid in a subterranean formation via a well bore penetrating the subterranean formation; first contacting the viscosified treatment fluid with the chlorite-based breaker and then contacting the viscosified treatment fluid with the clean-up composition and, allowing the viscosity of the viscosified treatment fluid to reduce.