| 摘要 |
Gellable treatment fluids containing a terpolymer that comprises 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, acrylic acid monomer units can be used in various subterranean operations where it is necessary for the treatment fluid to remain in a gelled state for extended periods of time at high formation temperatures. Methods for treating a subterranean formation can comprise providing a treatment fluid comprising an aqueous carrier fluid, a crosslinking agent, a gel stabilizer for a crosslinked gel, and a terpolymer that comprises 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, and acrylic acid monomer units, or any salt thereof, wherein the gel stabilizer comprises a hydroxylamine; allowing the treatment fluid to form a gel in the subterranean formation, wherein the gel comprises the crosslinked gel formed after reacting said terpolymer with said crosslinking agent; and breaking the gel after it has been in the subterranean formation for at least about one day. |
