Process for partially or completely plugging permeable zones in

Details Process for partially or completely plugging permeable zones in Process for partially or completely plugging permeable zones in

1983-02-28

1984-07-24

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166300, 523130, 524512, E21B 33138

Patent

active

044613512

ABSTRACT:
Highly permeable zones in a subterranean formation are selectively plugged by injecting an aqueous solution of urea, an aldehyde and an acrylamide polymer via a well into the highly permeable zones. The solution forms a polymer resin in situ at a temperature of from about 20.degree. C. to 75.degree. C. and a pH of from about 3 to 9 and over a period of from about 2 to 72 hours. The resulting polymer resin either partially or completely plugs the highly permeable zones in the formation.

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patent: 4338379 (1982-07-01), Strolle et al.

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