Oil recovery by alkaline-surfactant waterflooding

Details Oil recovery by alkaline-surfactant waterflooding Oil recovery by alkaline-surfactant waterflooding

1975-04-23

1977-01-25

Purser, Ernest R.

Wells

Processes

Distinct, separate injection and producing wells

252 855D, E21B 4322

Patent

active

040046389

ABSTRACT:
Recovery of oil from subterranean oil reservoirs by waterflooding employing an alkaline agent and a sulfonate surfactant. An aqueous initiation slug containing an alkaline agent selected from the group consisting of alkali metal and ammonium hydroxides is injected into the reservoir via a suitable injection system. Thereafter an aqueous surfactant slug is injected into the reservoir behind the initiation slug. The surfactant slug contains a sulfonate surfactant and an alkaline agent. Subsequent to injection of the surfactant slug, an aqueous flooding medium is injected in order to displace the oil within the reservoir to a production system from which it is recovered. A portion of the flooding medium may contain a thickening agent for mobility control purposes.

REFERENCES:
patent: 3298436 (1967-01-01), McCardell
patent: 3330347 (1967-07-01), Brown et al.
patent: 3414053 (1968-12-01), Treiber et al.
patent: 3437141 (1969-04-01), Brandner et al.
patent: 3623553 (1971-11-01), Burdge
patent: 3648771 (1972-03-01), Kelly et al.
patent: 3731741 (1973-05-01), Palmer et al.
patent: 3777817 (1973-12-01), Feuerbacher et al.
patent: 3837400 (1974-09-01), Martin
Jennings, "A Caustic Waterflooding Process For Heavy Oils", Journal of Petroleum Technology, Dec. 1974, pp. 1344-1352.

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