Mining or in situ disintegration of hard material – In situ conversion of solid to fluid – Input and output wells
Patent
1982-08-11
1984-10-02
Suchfield, George A.
Mining or in situ disintegration of hard material
In situ conversion of solid to fluid
Input and output wells
166252, 166270, 405263, E21B 4328, E21B 4700
Patent
active
044744080
ABSTRACT:
The ammonium ions in a subterranean clay-containing formation may be removed by flushing the formation with a calcium ion containing restoration fluid having substantially the highest pH effective to prevent precipitation of calcium hydroxide from said restoration fluid. The calcium ion concentration in the restoration fluid is maintained between about 10,000 and 100,000 ppm until the ammonia concentration in the produced fluid peaks or is less than about 100 ppm. Thereafter the calcium ion concentration is maintained at about 400 to about 600 ppm until the desired level of ammonia is obtained, usually about 1-3 ppm.
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patent: 4134618 (1979-01-01), Kossack
patent: 4162707 (1979-07-01), Yan
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patent: 4372616 (1983-02-01), Paul et al.
"Removal of Ammonium Ions from Subterranean Formations by Flushing with Lime Saturated Brines"; SME-AIME Annual Meeting; Dallas, Texas; Feb. 14-18, 1982; Yan and Espenscheid.
Dotson Billy J.
Yan Tsoung-yuan
Gilman Michael G.
Malone Charles A.
McKillop Alexander J.
Mobil Oil Corporation
Suchfield George A.
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