Process for selectively plugging subterranean formations with a

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

1983-04-14

1984-09-25

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166300, E21B 33138

Patent

active

044731191

ABSTRACT:
Highly permeable zones in a subterranean formation are selectively plugged by injecting a melamine formaldehyde solution via a well into the highly permeable zones. The solution is water soluble and preferentially enters water-containing zones where it reacts to form a resin at a temperature of from about 25.degree. C. to about 120.degree. C. and a pH of from about 7 to 12 and over a period of from about 1 to 4 days. The resulting resin substantially plugs the highly permeable zones in the formation.

REFERENCES:
patent: 2562866 (1951-07-01), Kurtz, Jr. et al.
patent: 2649159 (1953-08-01), Boyer
patent: 3306356 (1967-02-01), Sparlin
patent: 3495412 (1970-02-01), Sakata et al.
patent: 3956140 (1976-05-01), Nahm et al.
patent: 4157322 (1979-06-01), Colegrove
patent: 4210206 (1980-07-01), Ely et al.

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