Method of reducing the reactivity of steam and condensate mixtur

Details Method of reducing the reactivity of steam and condensate mixtur Method of reducing the reactivity of steam and condensate mixtur

1989-11-27

1991-08-06

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

166279, 166303, 1663051, 252 8552, E21B 3706, E21B 4324

Patent

active

050369156

ABSTRACT:
This invention relates generally to a method for reducing the reactivity of steam or mixtures of steam and condensate in enhanced oil recovery. More particularly, the method of the invention comprises pH control through the injection or addition of either or both of ammonia and an ammonium salt of an organic or inorganic acid, such as ammonium chloride, to the feed water used to generate the steam or to the steam itself. This inhibits the dissolution of certain mineral groups, controls the migration of fines, inhibits the swelling of clays, controls chemical reactions in which new clay minerals are formed, and helps to prevent the precipitation of asphaltenes and the formation of emulsions as a result of steam injection.

REFERENCES:
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patent: 4714112 (1987-12-01), Nigrini et al.
patent: 4802533 (1989-02-01), Hsueh et al.
patent: 4903769 (1990-02-01), Hsueh et al.
"Process Aids Enhanced Oil Recovery", C & EN, Jun. 7, 1982, p. 38.
Rohrback, Dr. Gilson, "New Additive Promises Revised Steam-Stimulation Economics", The Oil and Gas Journal, Oct. 10, 1966, pp. 207-209.

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