Wells – Processes – With indicating – testing – measuring or locating
Patent
1980-12-12
1982-05-18
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
166300, 166302, 166303, E21B 4322, E21B 4324, E21B 4700
Patent
active
043300375
ABSTRACT:
A portion of a subterranean oil and water-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.
REFERENCES:
patent: 2124495 (1938-07-01), Miller
patent: 2889884 (1959-06-01), Henderson et al.
patent: 3129760 (1964-04-01), Gambill
patent: 3532165 (1970-10-01), Raifsnider et al.
patent: 3712380 (1973-01-01), Caffey
patent: 4178993 (1979-12-01), Richardson et al.
patent: 4219083 (1980-08-01), Richardson et al.
Fair, Jr. Walter B.
Richardson Edwin A.
Novosad Stephen J.
Shell Oil Company
Suchfield George A.
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