Method for restoring formation previously leached with an ammoni

Mining or in situ disintegration of hard material – In situ conversion of solid to fluid – Dissolving or chemical reaction

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E21B 4328

Patent

active

043726160

ABSTRACT:
A method is disclosed for restoring to environmentally acceptable levels the ammonia content in a subterranean formation which has been previously subjected to in situ oxidative leaching employing an ammonium leach solution by flushing the formation with carbonic acid.

REFERENCES:
patent: 4079783 (1978-03-01), Snavely et al.
patent: 4114693 (1978-09-01), Foster et al.
patent: 4134618 (1979-01-01), Kossack
patent: 4155982 (1979-05-01), Hunkin et al.
patent: 4278292 (1981-07-01), Yan et al.
patent: 4300860 (1981-11-01), Yan

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