Gel for retarding water flow

Details Gel for retarding water flow Gel for retarding water flow

E - Fixed Constructions

21

B

31/24

E21B 43/22 (2006.01) C09K 8/512 (2006.01)

Patent

CA 1228227

Gel for Retarding Water Flow Abstract A polyvinyl alcohol-aldehyde gel having a high water content and low degree of crosslinking is pro- vided which has improved stability. The gel can be used to retard the flow of water in subterranean for- mation encountered in hydrocarbon production. One embodiment of the invention provides a method of forming the gel in-situ in the pores of subterranean zones thereby retarding or blocking the flow of water therein.

459031

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