Well Completion Methods Using Gellable Treatment Fluids Having Long Term Thermal Stability of the Gelled State
First Claim
1. A method comprising:
- providing a treatment fluid comprising an aqueous carrier fluid, a crosslinking agent, a gel stabilizer, and a terpolymer that comprises 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, and acrylic acid monomer units, or any salt thereof;
introducing the treatment fluid into a subterranean formation;
allowing the treatment fluid to form a gel in the subterranean formation; and
breaking the gel after it has been in the subterranean formation for at least about one day.
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Accused Products
Abstract
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, and a terpolymer that comprises 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, and acrylic acid monomer units, or any salt thereof; introducing the treatment fluid into a subterranean formation; allowing the treatment fluid to form a gel in the subterranean formation; and breaking the gel after it has been in the subterranean formation for at least about one day.
15 Citations
21 Claims
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1. A method comprising:
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providing a treatment fluid comprising an aqueous carrier fluid, a crosslinking agent, a gel stabilizer, and a terpolymer that comprises 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, and acrylic acid monomer units, or any salt thereof; introducing the treatment fluid into a subterranean formation; allowing the treatment fluid to form a gel in the subterranean formation; and breaking the gel after it has been in the subterranean formation for at least about one day. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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providing a treatment fluid comprising an aqueous carrier fluid, a crosslinking agent, and a terpolymer that comprises 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, and acrylic acid monomer units, or any salt thereof; introducing the treatment fluid into a subterranean formation; and allowing the treatment fluid to form a crosslinked gel in the subterranean formation that, after formation, does not flow under in situ stress within the subterranean formation. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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providing a treatment fluid comprising an aqueous carrier fluid, a crosslinking agent, a gel stabilizer, and a terpolymer that comprises 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, and acrylic acid monomer units, or any salt thereof; introducing the treatment fluid into a subterranean formation; allowing the treatment fluid to form a gel in the subterranean formation that at least partially blocks the flow of formation fluids in at least a portion of the subterranean formation; and breaking the gel after it has been in the subterranean formation for at least about one day. - View Dependent Claims (18, 19, 20, 21)
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Specification