Unplugging brine-submerged perforations

Details Unplugging brine-submerged perforations Unplugging brine-submerged perforations

1981-09-30

1983-08-23

Novosad, Stephen J.

Wells

Processes

Chemical inter-reaction of two or more introduced materials

166303, 166304, E21B 3700, E21B 4325

Patent

active

043998682

ABSTRACT:
Fluid passageways between a well borehole and a subterranean reservoir which are both plugged and submerged within relatively dense brine can be contacted with heat and oil solvent by arranging a nitrogen gas generating aqueous solution to be both reactive at the reservoir temperature and denser than the brine in the borehole and flowing alternating slugs of it and a liquid oil solvent into the zone to be treated.

REFERENCES:
patent: 2799342 (1957-07-01), Fatt
patent: 3354958 (1967-11-01), Parker
patent: 4090562 (1978-05-01), Maly et al.
patent: 4178993 (1979-12-01), Richardson et al.
patent: 4219083 (1980-08-01), Richardson et al.
patent: 4232741 (1980-11-01), Richardson et al.

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