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US 2024/0254380 A1Published application
Carbon dioxide capturing polymeric system for water shutoff applications
AssigneeAramco Services Company
InventorsWenwen Li, Fakuen Frank Chang, Feng Liang
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Abstract
A treatment fluid and method for water shut-off applications containing an amine-functionalized solid support, an epoxy resin, a second curing agent, and a carrier fluid. Prior to use of the treatment fluid, the amine-functionalized solid support has reacted with carbon dioxide to produce a carbamate-functionalized solid support. The treatment fluid is introduced into a geological formation with high-permeability pathways, curing the epoxy resin, and sealing these pathways.
Claims19
A treatment fluid for water shut-off applications, the treatment fluid comprising:
- an amine-functionalized solid support comprising a porous adsorbent material functionalized with an amine-rich compound selected from the group consisting of monoethanolamine (MEA), diethylenetriamine (DETA), triethylenetetramine (TETA), tetraethylenepentamine (TEPA), pentaethylenehexamine (PEHA), 2-amino-2-methyl-1-propanol (AMP), diethanolamine, polyethyleneimine, polyallylamine, polyvinylamine, and polydiallylamine;
- an epoxy resin selected from the group consisting of bis-phenol A epoxy, bis-phenol F epoxy, aliphatic epoxy, and cycloaliphatic epoxy;
- a second curing agent selected from the group consisting of a dicyandiamide and a dihydrazide;
- and
- a carrier fluid selected from the group consisting of water, glycol ether, ethylene glycol, dimethyl sulfoxide, dimethyl formamide, and petroleum distillate fractions, where the amine-functionalized solid support has been previously reacted with carbon dioxide to produce a carbamate-functionalized solid support.
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A method comprising:
- combining a carbamate-functionalized solid support, an epoxy resin, a second curing agent, and a carrier fluid to create a treatment fluid;
- introducing the treatment fluid into a geological formation having high-permeability pathways;
- curing the epoxy resin;
- and
- sealing the high-permeability pathways using the cured epoxy resin,
- wherein the epoxy resin is selected from the group consisting of bis-phenol A epoxy, bis-phenol F epoxy, aliphatic epoxy, and cycloaliphatic epoxy,
- wherein the second curing agent is selected from the group consisting of a dicyandiamide and a dihydrazide, and
- wherein the carrier fluid is selected from the group consisting of water, glycol ether, ethylene glycol, dimethyl sulfoxide, dimethyl formamide, and petroleum distillate fractions.
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Dependencies are inferred from the claim text.