Mobility controlled caustic flooding process for reservoirs containing dissolved divalent metal cations
CA 1048769 A · Owner: Union Oil Company Of California · Inventors: Sarem, Amir M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for recovering oil from subterranean reservoirs having connate water containing dissolved divalent metal cations in which small slugs of (1) aqueous alkali metal hydroxide solution, (2) a diluto aqueous alkaline alkali metal silicate solution, and (3) 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. A small slug of water is injected between successive slugs of the reactant solutions to separate the reactants during injection. Also, alkali metal carbonate can be incorporated into the aqueous alkali metal hydroxide solution, or aqueous …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 1996.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.