Method for selectively plugging deep subterranean formations wit

Details Method for selectively plugging deep subterranean formations wit Method for selectively plugging deep subterranean formations wit

1987-10-07

1988-09-27

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166288, 166292, E21B 33138, E21B 4324

Patent

active

047734809

ABSTRACT:
Improved vertical and/or horizontal sweep efficiency in a deep subterranean oil containing formation having a temperature in excess of 250.degree. F. containing relatively high permeability zones and relatively low permeability zones is obtained by injecting an aqueous polysulfide solution into the formation that preferentially enters the relatively high permeability zones and allowing the aqueous polysulfide solution in the relatively high permeability zones to disproportionate under the temperature conditions within the relatively high permeability zones to form a precipitate of elemental sulfur in situ which plugs the relatively high permeability zones in the formation. Thereafter, improved sweep efficiency is realized in displacing oil from the lesser permeable zones.

REFERENCES:
patent: 978359 (1910-12-01), Cooper
patent: 2543868 (1951-03-01), Prokop
patent: 3244230 (1966-04-01), Sharp
patent: 3275077 (1966-09-01), Smith et al.
patent: 3302715 (1967-02-01), Smith et al.
patent: 3333636 (1967-08-01), Groves, Jr.
patent: 3376931 (1968-04-01), Messenger
patent: 3437144 (1969-04-01), Fisher
patent: 3438439 (1969-04-01), Froning
patent: 3669188 (1972-06-01), Coles et al.
patent: 4564069 (1986-01-01), Rubinstein et al.
"Polysulfide Stops FCCU Corrosion," by E. F. Ehmke, Hydrocarbon Processing, Jul. 1981, pp. 149-155.

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