Delayed gelling agents
AssigneesConocoPhillips Company, University of Kansas
InventorsHuili Guan, Cory Berkland, Ahmad Moradi-Araghi, Jenn-Tai Liang, David R. Zornes, Riley B. Needham, Min Cheng, James H. Hedges, James P. Johnson, Faye L. Scully
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Abstract
The invention is directed to delayed gelation agents comprising a degradable polymeric cage containing therein one or more gelation agents. The cage degrades in situ, e.g, in an oil reservoir, thus releasing the gelation agent(s), which can then crosslink second polymers in situ to form a gel.
Claims4
A delayed gelation composition, comprising a degradable polymeric cage, and having within said cage a gelation agent, wherein said polymer comprises one or more monomers and is crosslinked with a labile crosslinker to form said degradable polymeric cage, wherein the monomer comprises sodium AMPS and the labile crosslinker comprises a polyethylene glycol diacrylate and the gelation agent comprises chromium and polyethyleneimine.
Dependencies are inferred from the claim text.