Colloidal silica-based fluid diversion

Details Colloidal silica-based fluid diversion Colloidal silica-based fluid diversion

1986-09-15

1988-03-22

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

166275, E21B 33138

Patent

active

047322136

ABSTRACT:
A process for selectively plugging permeable zones in subterranean formations or for plugging subterranean leaks which comprises injecting into the permeable zone or the site of the subterranean leak an aqueous solution containing 1 to 70 weight percent of a non-aggregated colloidal silica sol having a particle size in the range between 4 and 100 nm and a pH in the range between about 1 and 10, and causing said solution to gel in said zone or at said site.

REFERENCES:
patent: 3701384 (1972-10-01), Routson et al.
patent: 3759326 (1973-09-01), Christopher et al.
patent: 3817330 (1974-06-01), Christopher et al.
patent: 3868999 (1975-03-01), Christopher et al.
patent: 3965986 (1976-06-01), Christopher

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