Patent ID: 9587469
Date: 2017-03-07
CPC Classifications: C09K,E21B

Claim:
1. A method of treating a subterranean formation, the method comprising: placing in the subterranean formation a composition comprising a poly(alkenylamide)-polysaccharide hydrogel; and plugging a flow pathway in the subterranean formation with the hydrogel; wherein the poly(alkenylamide)-polysaccharide hydrogel comprises at least one crosslink comprising an imide between the poly(alkenylamide) and the polysaccharide, each of PAA and CL at each occurrence independently occur in the orientation shown or in the opposite orientation, the polysaccharide comprises Structure I each of R at each occurrence R at each occurrence R at each occurrence CI p is at least about 2, each of R each of L