Process for chemically treating reservoir pyrobitumen to improve

Details Process for chemically treating reservoir pyrobitumen to improve Process for chemically treating reservoir pyrobitumen to improve

1994-09-23

1996-05-07

Suchfield, George A.

Wells

Processes

Heating, cooling or insulating

166302, 1663051, 166312, E21B 4324, E21B 4325

Patent

active

055137075

ABSTRACT:
The process involves a well stimulation treatment of a hydrocarbon reservoir containing solid pyrobitumen. A strong oxidant, preferably sodium hypochlorite, is injected into the reservoir as an aqueous solution containing 5 wt. % or higher concentration of the oxidant. The oxidant is retained in contact with the formation for a predetermined retention period and the well is then backflowed or pumped to remove oxidation products. The permeability of the reservoir is improved, apparently by conversion of the solid pyrobitumen to removable gaseous and liquid products.

REFERENCES:
patent: 3122503 (1964-02-01), Katzer
patent: 3482636 (1969-12-01), Crowe
patent: 3648774 (1972-03-01), Kirk
patent: 4068716 (1978-01-01), Allen
patent: 4569393 (1986-02-01), Bruning et al.
patent: 5103914 (1992-04-01), LaHaye

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