Wells – Processes – Cyclic injection then production of a single well
Patent
1982-09-23
1984-02-07
Suchfield, George A.
Wells
Processes
Cyclic injection then production of a single well
166261, 166272, E21B 4324
Patent
active
044297459
ABSTRACT:
Oil is recovered from an oil-bearing reservoir in a process employing an in-situ combustion process utilizing a combustion-supporting gas containing at least 75% by volume pure oxygen, and preferably substantially pure oxygen, and a sequence in which the production well or wells are cyclically throttled. In place of using an in-situ combustion process, mixtures of steam and carbon dioxide or mixtures of steam and low molecular weight C.sub.3 -C.sub.8 hydrocarbons are injected into the reservoir and the production well is cyclically throttled. The production well flow rate is restricted until the bottom-hole pressure of the well has increased to an amount of about 30% to about 90% of the fluid injection pressure at the injection well. Thereafter, the production well is opened and oil is recovered therefrom as the bottom-hole pressure declines. The throttled production cycle may be repeated at appropriate intervals during the process.
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McKillop Alexander J.
Miller Lawrence O.
Mobil Oil Corporation
Powers, Jr. James F.
Suchfield George A.
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