Selectively plugging subterranean formations with a hydrocarbon

Details Selectively plugging subterranean formations with a hydrocarbon Selectively plugging subterranean formations with a hydrocarbon

1983-04-14

1984-11-13

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

166295, E21B 4312

Patent

active

044820151

ABSTRACT:
Highly permeable zones in a subterranean formation vertically bounded by a relatively less permeable zone are selectively plugged by injecting an emulsion of melamine and formaldehyde in an alcohol medium via a well into the highly permeable zones. The emulsion is hydrocarbon soluble are preferentially envelops the highly permeable zones where it reacts to form a resin at a temperature of from about 80.degree. C. to about 250.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: 2649159 (1953-08-01), Boyer
patent: 2754274 (1956-07-01), Boyer
patent: 3305017 (1967-02-01), Dollarhide
patent: 3306356 (1967-02-01), Sparlin
patent: 3373812 (1968-03-01), Smith
patent: 3495412 (1970-02-01), Sakata et al.
patent: 3956140 (1976-05-01), Nahm et al.
patent: 4210106 (1980-07-01), Ely et al.

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