Patent ID: 7905287

Claim:
A method of treating a subterranean formation, the method comprising: pumping a polymeric solution into the subterranean formation; pumping an activator into the subterranean formation; wherein a polymer comprising the polymeric solution and the activator are separated while being pumped into the subterranean formation; and wherein the activator comprises at least one brine selected from the group consisting of: a formate brine, an acetate brine, an oxalate brine, and combinations thereof; contacting the polymeric solution and the activator within the subterranean formation; allowing the contacted polymeric solution and the activator to form a substantially impermeable precipitate within the subterranean formation that at least partially blocks a flow of a wellbore servicing fluid further into the subterranean formation; and dissolving at least a portion of the substantially impermeable precipitate.