Patent ID: 8720569

Claim:
A method of treating a treatment zone of a well, the method comprising the steps of: (a) forming a treatment fluid comprising: (i) an aqueous phase; (ii) at least 5 ppm iron ion dissolved in the aqueous phase, but less than 1,000 ppm iron ion is dissolved in the aqueous phase; (iii) a source of at least 5 ppm iodide ion to be dissolved in the aqueous phase, wherein the source of iodide ion is selected from the group consisting of iodine, alkali metal iodides, alkaline earth metal iodides, ammonium iodide, and any combination thereof; (iv) a water-soluble viscosity-increasing agent dissolved in the aqueous phase; and (v) a source of an oxidative breaker to be dissolved in the aqueous phase; wherein the source of the iodide ion is in a concentration in the treatment fluid to provide iodide ion in the aqueous phase in a concentration that is less than 5 stoichiometric times the concentration of the iron ion; wherein the pH of the aqueous phase is greater than 4.5; and (b) introducing the treatment fluid into the zone.