Patent ID: 7888297

Claim:
A viscosified treatment fluid composition comprising: a base fluid, a gelling agent, and a breaker composition that comprises an oxidizing breaker and a breaker activator that comprises a metal and a protein, wherein the protein is an organic chelant and comprises at least one of the following: a polyamino acid with acidic side chains, a dicarboxylic acid, a polyaspartic acid, a polyglutamic acid, or a combination thereof, and wherein the oxidizing breaker comprises at least one of the following: a peroxide, a persulfate, a perborate, an oxyacid of a halogen, or an oxyanion of a halogen, chlorous acid, a hypochlorous acid or a combination thereof, and wherein the gelling agent comprises a crosslinked gelling agent that is formed by a reaction comprising a gelling agent and at least one of the following crosslinkers: a zirconium compound, a titanium compound, an aluminum compound, an antimony compound, a chromium compound, an iron compound, a copper compound, a zinc compound or a boron compound.