Reducing permeability of highly permeable zones in subterranean

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

1987-04-13

1988-08-30

Guynn, Herbert B.

Wells

Processes

Cementing, plugging or consolidating

106208, 166274, 166294, 252 8551, 2523153, 523130, E21B 33138, E21B 4322

Patent

active

047669594

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.

REFERENCES:
patent: 3794115 (1984-05-01), Skagerberg
patent: 3800872 (1978-06-01), Friedman
patent: 3815681 (1984-06-01), Richardson
patent: 3974077 (1976-08-01), Free
patent: 4498539 (1986-10-01), Bruning
patent: 4514309 (1985-04-01), Wadhwa
patent: 4579670 (1986-04-01), Payne
patent: 4619776 (1986-10-01), Mondshine

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