Process for selectively plugging a subterranean formation with a

Details Process for selectively plugging a subterranean formation with a Process for selectively plugging a subterranean formation with a

1983-02-28

1984-07-24

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166300, 523130, 524512, E21B 33138

Patent

active

044613520

ABSTRACT:
The highly permeable zones of a subterranean formation are selectively plugged by injecting an aqueous solution of an acrylamide polymer, an aldehyde and a borate salt via a well into the highly permeable zones. The solution forms a non-flowing, water-soluble polymer gel in situ at a temperature of from about 20.degree. C. to 100.degree. C. at an alkaline pH over a period of from about 2 to 72 hours. The polymer gel plugs the highly permeable zones.

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