Oil recovery by waterflooding employing a biopolymer-surfactant

Details Oil recovery by waterflooding employing a biopolymer-surfactant Oil recovery by waterflooding employing a biopolymer-surfactant

1976-03-01

1977-02-22

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166274, 252 855D, E21B 4322

Patent

active

040087662

ABSTRACT:
A process for the recovery of oil from subterranean oil reservoirs by waterflooding employing a multicomponent anionic-nonionic surfactant system in combination with a Xanthomonas polysaccharide thickening agent. The surfactant system and polysaccharide provide for an enhanced thickening action in the injected aqueous liquid at relatively low shear rates. The anionic surfactant employed is an amide-linked sulfonate and the nonionic component is a polyethylene oxide type surfactant.

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patent: 3811505 (1974-05-01), Flournoy et al.
patent: 3827497 (1974-08-01), Dycus et al.
patent: 3908760 (1975-09-01), Clampitt et al.
Foster, W. R., "A Low-Tension Waterflooding Process", Journal of Petroleum Technology, Feb. 1973, vol. 25, pp. 205-210.
McCutcheon, J. W., "Surfactants Listed...", Reprint from "Soap & Chemical Specialties" Dec. 1957, Jan.-Apr., 1958, p. 30.

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