In situ reversible crosslinked polymer gel used in hydrocarbon recovery applications
This patent describes a process for reversing a crosslinked polymer gel. It comprises preparing a crosslinked polymer gel comprising an acrylamide-containing polymer, a crosslinking agent and a degelling agent precursor; hydrolyzing the precursor to a degelling agent; and reacting the degelling agent with the gel to reverse the gel. This patent also describes a process for placing a crosslinked polymer gel in a subterranean formation and subsequently reversing the gel in situ. It comprises preparing a crosslinked polymer gel by combining a crosslinkable polymer, a crosslinking agent and a degelling agent precursor in solution; injecting the crosslinked polymer gel into a subterranean formation and placing the gel in a desired treatment region of the formation; hydrolyzing the precursor to a degelling agent in situ; and complexing the degelling agent with the crosslinking agent to reverse the gel in situ.
- Assignee:
- Marathon Oil Co., Findlay, OH (United States)
- Patent Number(s):
- US 5082056; A
- Application Number:
- PPN: US 7-598293
- OSTI ID:
- 5293184
- Resource Relation:
- Patent File Date: 6 Oct 1990
- Country of Publication:
- United States
- Language:
- English
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