Wells – Processes – Distinct – separate injection and producing wells
Patent
1987-01-02
1988-05-03
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166269, E21B 4322
Patent
active
047413999
ABSTRACT:
There is disclosed a method of recovering oil from a subterranean oil formation having the vertical thickness of 40 ft or more. The method exploits the effect of gravity on the various slugs of diverse materials injected into the oil column of the formation. The method comprises injecting a surfactant slug into the lower 50-75% of the vertical thickness of the oil column, then injecting a slug of a mobility control polymer into the upper 50-75% portion of the thickness of the oil column, followed by the injection of a slug of a drive fluid over substantially the entire vertical thickness of the oil formation. Optionally, a low-salinity pre-flush slug may be injected to remove high salinity water from contact with the oil and an alkaline pre-treat solution may be injected to remove divalent ions prior to the injection of the surfactant slug.
REFERENCES:
patent: 3139929 (1964-07-01), Habermann
patent: 3221810 (1965-12-01), Marx
patent: 3302710 (1967-02-01), Odeh
patent: 3667545 (1972-06-01), Knight
patent: 3700031 (1972-10-01), Germer, Jr. et al.
patent: 3710861 (1973-01-01), Steeg
patent: 3977470 (1976-08-01), Chang
patent: 4079785 (1978-03-01), Hessert et al.
patent: 4122895 (1978-10-01), Sitton et al.
patent: 4240504 (1980-12-01), Reed
patent: 4250961 (1981-02-01), Morse et al.
Hurd B. George
Jones Lloyd G.
Strange Lloyd K.
Aksman Stanislaus
Gilman Michael G.
McKillop Alexander J.
Mobil Oil Corporation
Suchfield George A.
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