Surfactant waterflooding with hydrocarbon slug

Details Surfactant waterflooding with hydrocarbon slug Surfactant waterflooding with hydrocarbon slug

1976-12-20

1978-01-03

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

E21B 4322

Patent

active

040661261

ABSTRACT:
Surfactant waterflooding process involving the injection of a hydrocarbon slug followed by a surfactant slug and a mobility control slug. The hydrocarbon slug has a viscosity less than that of the reservoir oil and is injected within the range of 0.01-0.04 pore volume. The surfactant slug is injected in an amount within the range of 0.05-0.3 pore volume and exhibits a surfactant concentration within the range of 0.5-4.0 weight percent. At least a portion of the mobility control slug has a viscosity at least as great as the viscosity of the hydrocarbon slug.

REFERENCES:
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patent: 3372749 (1968-03-01), Williams
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patent: 3491834 (1970-01-01), Ahearn et al.
patent: 3508612 (1970-04-01), Reisberg et al.
patent: 3729053 (1973-04-01), Froning
patent: 3811505 (1974-05-01), Flournoy et al.
patent: 3827497 (1974-08-01), Dycus et al.
patent: 3865187 (1975-02-01), Carlin et al.
patent: 3927716 (1975-12-01), Burdyn et al.
Cash et al., "Modeling Crude Oils for Low Interfacial Tension" SPE of AIME, paper No. 5813, 3-(22-24)-76, 9 pages.
Foster, "A Low-Tension Waterflooding Process," Journal of Petroleum Tech., vol. 25, Feb. 1973, pp. 205-210.

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