| abstract |
A process for the recovery of oil from a subterranean petroleum reservoir wherein small slugs of a dilute aqueous alkaline metal silicate solution and a dilute aqueous solution of an agent that reacts with the alkali metal silicate to form a gelatinous precipitate are alternately injected into the reservoir through one or more injection wells, and oil recovered from spaced production wells. A small slug of water is injected between successive slugs of the reactant solutions to separate the reactants during injection. |