Method for silica gel emplacement for enhanced oil recovery

Details Method for silica gel emplacement for enhanced oil recovery Method for silica gel emplacement for enhanced oil recovery

1992-12-18

1994-10-04

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166273, 166292, 166300, E21B 33138, E21B 4320, E21B 4322

Patent

active

053517571

ABSTRACT:
A method for emplacing a silicate gel to improve the sweep efficiency of a water, gas, or steam flood operation by reducing the permeability of high-permeability thief zones is disclosed. Controlled quantities of a silicate solution and either a gas or a gas and an organic acid are injected into a well to infiltrate and generate a controlled amount of a silicate gel of a controlled SiO.sub.2 concentration in the high-permeability thief zones, to reduce the permeability thereof. Base agents and weak acids may be added to control gel generation rate. Methods for selective emplacement of silicate gels into thief zones through a well without selective injection facilities are also disclosed.

REFERENCES:
patent: 2402588 (1946-06-01), Andresen
patent: 3261400 (1966-07-01), Elfrink
patent: 3285338 (1966-11-01), Boston
patent: 3310110 (1967-03-01), Martin
patent: 3386509 (1968-06-01), Froning
patent: 3396790 (1968-08-01), Eaton
patent: 3645336 (1972-02-01), Young et al.
patent: 4428424 (1984-01-01), Lacy et al.
patent: 4676318 (1987-06-01), Myers et al.

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