Reducing the permeability of a rock formation

Details Reducing the permeability of a rock formation Reducing the permeability of a rock formation

1987-04-06

1989-04-11

Suchfield, George A.

Wells

Processes

Electric current or electrical wave energy through earth for...

166 60, 166 651, 166288, 166292, 166293, E21B 33138, E21B 3604

Patent

active

048197238

ABSTRACT:
Permeability of a highly permeable zone in a subterranean formation is reduced by injecting an oil external emulsion of an aqueous solution of alkali metal silicate. Emulsion adjacent the well bore is broken by the application of microwave. Released alkali metal silicate then forms a plug of gel at this point, through contact with formation brines, which holds the rest of the emulsion in place until it breaks down and gels. In one aspect a second internal phase containing a gelation agent is provided to accelerate gelling.

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patent: 4293440 (1981-10-01), Elphingstone et al.
patent: 4547298 (1985-10-01), Novak
patent: 4638863 (1987-01-01), Wilson

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