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

C - Chemistry, Metallurgy

09

K

31/13, 166/31, 3

C09K 8/05 (2006.01)

Patent

CA 1085601

"Abstract of the Disclosure" 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 sili- cate solution. It is optional to follow the said silicate solution with an aqueous drive fluid. In treating hetero- geneous reservoirs, it is further optional to also inject a small slug of a dilute aqueous solution of an agent that re- acts 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.

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