Wells – Processes – Distinct – separate injection and producing wells
Patent
1987-12-28
1989-06-13
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166268, 166275, E21B 4322
Patent
active
048383503
ABSTRACT:
The invention is a method of recovering hydrocarbons from an underground vertical hydrocarbon reservoir having a substantial vertical thickness, an oil saturation relatively near residual oil saturation to gas, and at least one injection well and one production well penetrating the reservoir. The method comprises injecting a surfactant slug into the bottom of the reservoir above any water zone or aquifer, and driving the surfactant slug upwards through the reservoir by the use of some driving force. The driving force may be supplied by one or more of a combination of methods comprising producing the gas cap of the reservoir, producing hydrocarbons banked above the surfactant slug, or injecting fluid below the surfactant slug. Hydrocarbons are recovered at one or more production wells.
REFERENCES:
patent: 1651311 (1927-11-01), Atkinson
patent: 3215198 (1965-11-01), Willman
patent: 3363684 (1968-01-01), Miller
patent: 3455385 (1969-07-01), Gogarty
patent: 3455389 (1969-07-01), Gogarty
patent: 3495661 (1970-02-01), Gogarty
patent: 3519076 (1970-07-01), Walker
patent: 4140182 (1979-02-01), Vriend
patent: 4393936 (1983-07-01), Josendal
Kokolis George P.
McCoy Kevin P.
Delhommer Harold J.
Park Jack H.
Priem Kenneth R.
Suchfield George A.
Texaco Canada Resources
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