Enhanced oil recovery using alkaline sodium silicate solutions

Details Enhanced oil recovery using alkaline sodium silicate solutions Enhanced oil recovery using alkaline sodium silicate solutions

1976-05-24

1978-03-28

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166273, 166292, E21B 4322, E21B 33138

Patent

active

040810291

ABSTRACT:
An enhanced oil recovery process for subterranean reservoirs wherein there is injected into the reservoir a relatively large slug of a dilute aqueous alkali metal silicate solution. It is optional to follow the said silicate solution with an aqueous drive fluid. In treating heterogeneous reservoirs, it is further optional to also inject a small slug of a dilute aqueous solution of an agent that reacts with the alkali metal silicate to form a gelatinous precipitate. In the latter instance a small spacer slug of water is injected between successive slugs of the reactant solutions to separate the reactants during injection.

REFERENCES:
patent: 2920041 (1960-01-01), Meadors
patent: 3396790 (1968-08-01), Eaton
patent: 3530937 (1970-09-01), Bernard
patent: 3805893 (1974-04-01), Sarem
patent: 3871452 (1975-03-01), Sarem
patent: 3871453 (1975-03-01), Sarem
patent: 3874453 (1975-04-01), Friedman
patent: 3920074 (1975-11-01), Sarem
patent: 3927716 (1975-12-01), Burdyn et al.

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