E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/25
E21B 43/22 (2006.01) C09K 8/60 (2006.01) E21B 36/00 (2006.01) E21B 43/24 (2006.01)
Patent
CA 1167759
Abstract of the Invention A portion of a subterranean oil and gas containing reservoir is concurrently chemically heated and selectively increased in its effective permeability to oil by injecting a solution of compounds containing ammonium ions and nitrite ions, which react exothermically to generate gaseous nitrogen, and a reaction-rate-controlling buffer. The reactant concentration and the rate at which the solution is injected are arranged to provide a selected temperature increase within a selected portion of the reservoir.
390047
Fair Walter B. Jr.
Richardson Edwin A.
Shell Canada Limited
Smart & Biggar
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