Secondary oil recovery process

Wells – Processes – Distinct – separate injection and producing wells

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Details

166275, 252 855D, E21B 4322

Patent

active

040461963

ABSTRACT:
Oil is recovered from an oil-bearing subterranean formation penetrated by an injection well and a production well by injecting into the formation via the injection well a solution of a normally solid polymerized methacrylate and oil displaced by the injected solution is recovered from the formation via the production well. Optionally, after the solvent solution has been injected, a hydrocarbon slug such as crude oil, petroleum distillate, a soluble oil composition, etc. may be injected and, if desired, this may be followed by injection of water.

REFERENCES:
patent: 2842492 (1958-07-01), Englehardt et al.
patent: 3033288 (1962-05-01), Holm
patent: 3163213 (1964-12-01), Bernard
patent: 3270811 (1966-09-01), Meyer et al.
patent: 3482631 (1969-12-01), Jones
patent: 3500918 (1970-03-01), Holm
patent: 3589443 (1971-06-01), Fisher

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