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US 2012/0234544 A1Published application
Degradable gels in zonal isolation applications
AssigneeM-I L.L.C.
InventorsMark Sanders, David Antony Ballard
Life of this patent
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Abstract
A method of treating a formation that includes emplacing an oxidizing breaker fluid into a region of the formation occupied by a gel; and allowing sufficient time for the oxidizing breaker fluid to degrade the gel is disclosed.
Claims18
A method of treating a formation, comprising:
- emplacing an oxidizing breaker fluid into a region of the formation occupied by a gel;
- and
- allowing sufficient time for the oxidizing breaker fluid to degrade the gel,
- wherein the gel comprises at least one of a lignin, a lignosulfonate, a tannin, a tannic acid, a modified lignin, a modified lignosulfonate, a modified tannin, a modified tannic acid, and combinations thereof or biopolymers, starches, carboxy methyl cellulose, polyacrylates, polyacrylamides, polyamines, polyetheramines, poly vinyl amines, polyethylene imines, and combinations thereof crosslinked with a crosslinking agent.
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A method of treating a formation, comprising:
- emplacing a gelling fluid comprising an internal oxidizer into the formation;
- allowing the gelling fluid to gel in a region of the formation;
- and
- activating the internal oxidizer to break the formed gel,
- wherein the gel comprises at least one of a lignin, a lignosulfonate, a tannin, a tannic acid, a modified lignin, a modified lignosulfonate, a modified tannin, a modified tannic acid, and combinations thereof or biopolymers, starches, carboxy methyl cellulose, polyacrylates, polyacrylamides, polyamines, polyetheramines, poly vinyl amines, polyethylene imines, and combinations thereof crosslinked with a crosslinking agent.
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Dependencies are inferred from the claim text.