Reducing permeability of highly permeable zones in...

Details Reducing permeability of highly permeable zones in... Reducing permeability of highly permeable zones in...

E - Fixed Constructions

21

B

31/24, 31/26

E21B 33/138 (2006.01) E21B 43/22 (2006.01) C09K 7/02 (1990.01)

Patent

CA 1303841

ABSTRACT High permeability zones in a subterranean formation are reduced in permeability by the time-delayed gelation of water soluble polymers in such formation with alkoxy amine esters of boric acid which slowly hydrolyze. Boric acid resulting from the hydrolysis converts to the borate ion which crosslinks the polymers to form gels.

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