Wells – Processes – Cyclic injection then production of a single well
Patent
1984-04-18
1985-09-17
Suchfield, George A.
Wells
Processes
Cyclic injection then production of a single well
1663051, 166312, 252 855B, E21B 4322
Patent
active
045414831
ABSTRACT:
Crude oil and gas production wells, which no longer produce oil or gas utilizing conventional primary and secondary means of recovery, can be returned to production by treatment comprising addition of a non-aqueous solution of certain phosphate ester surfactants followed by successive treatment with water or a hydrocarbon. Increased production also can be obtained in low-producing oil and gas wells by similar treatment with certain phosphate ester surfactants. Subsequent to treatment of a producer well, the phosphate ester surfactant is forced into the formation utilizing water or a hydrocarbon and said surfactant is allowed to remain in the producing well, for an effective period of at least 12 hours. Thereafter, pumping and/or conventional fluid drive means are then utilized to recover oil or gas from the subterranean oil or gas formation. The amount of non-aqueous surfactant solution utilized is sufficient to permeate the oil or gas subterranean formation in the area immediately adjacent to the producing well bore and up to a radius therefrom of about 20 feet.
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Borg-Warner Chemicals, Inc.
Schlott Richard J.
Suchfield George A.
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