Oil recovery by surfactant-alcohol waterflooding

Wells – Processes – Distinct – separate injection and producing wells

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252 8554, E21B 4322

Patent

active

046290001

ABSTRACT:
Waterflooding process for the recovery of oil from a subterranean formation in which at least a portion of the injected fluid consists of an oil slug containing a preferentially oil-soluble alcohol and a preferentially oil-soluble ether-linked sulfate or sulfonate. Specifically disclosed ether-linked surfactants include sulfonated or sulfated polyethoxylated alkylphenols. Specifically disclosed alcohols include aliphatic alcohols containing from 5 to 7 carbon atoms and having a water solubility of less than 3 percent.

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patent: 4017405 (1977-04-01), Holm
patent: 4110229 (1978-08-01), Carlin et al.
patent: 4318816 (1982-03-01), Schievelbein

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