Wells – Processes – Cyclic injection then production of a single well
Patent
1982-03-03
1984-08-28
Suchfield, George A.
Wells
Processes
Cyclic injection then production of a single well
166273, E21B 4322
Patent
active
044678681
ABSTRACT:
This invention relates to a method of enhancing oil recovery from an underground reservoir containing oil. A gas which is miscible with oil at the temperature and pressure of injection is injected into the reservoir to displace oil. Injection is carried out in such a way as to make sure that a mixing zone is formed in the reservoir such that each fluid introduced is miscible with the fluid immediately preceding it and the fluid immediately following it. This is done by injecting small slugs of fluid miscible with, but different in composition from, the fluid adjacent to the perforated zone of the well. The injection of each slug is followed by a shut-in period to permit a mixing zone to establish itself.
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Canterra Energy Ltd.
Suchfield George A.
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