Downhole fluid control processes

Details Downhole fluid control processes Downhole fluid control processes

1995-12-01

1997-12-30

Neuder, William P.

Wells

Processes

Cementing, plugging or consolidating

E21B 33138

Patent

active

057019550

ABSTRACT:
The invention provides a downhole process for the reduction of the permeability to water of a microporous subterranean formation which has average permeability of not greater than 10 Darcy,
the process comprising
applying to the formation a dispersion in non-aqueous liquid of water swellable, reverse-phase polymerized, substantially spherical particles of absorbent polymer of which at least 90% by weight have a diameter less than 10 .mu.m
whereby the dispersion of the substantially spherical particles of which at least 90% by weight have a size below 10 .mu.m is injected into the micropores of the subterranean formation and the particles are allowed to swell on contact with water and cause the reduction in permeability.

REFERENCES:
patent: 3302717 (1967-02-01), West et al.
patent: 3336979 (1967-08-01), Ingraham et al.
patent: 3353601 (1967-11-01), Dollarhide et al.
patent: 4172066 (1979-10-01), Zweigle et al.
patent: 4182417 (1980-01-01), McDonald et al.
patent: 4282928 (1981-08-01), McDonald et al.
patent: 4328864 (1982-05-01), Friedman
patent: 4572295 (1986-02-01), Walley
patent: 5260002 (1993-11-01), Wang
patent: 5462866 (1995-10-01), Wang
patent: 5465792 (1995-11-01), Dawson et al.

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