3837399 is referenced by 16 patents and cites 7 patents.

A petroleum recovery method employing a mixed solvent for use in subterranean petroleum-containing formations. The mixed solvent density is less than the density of water and greater than the density of the formation petroleum, and preferably has a boiling point less than the boiling point of the formation petroleum. Water is injected into the bottom of the petroleum formation and solvent is injected into the formation above the depth at which water is injected, and a mixture comprising solvent and petroleum is recovered from production wells. The solvent may be separated from the produced petroleum-solvent mixture by distillation and recondensation for reinjection into the formation. The rate of water injection is controlled to force the horizontally moving solvent bank slowly upward so as to sweep the entire formation.

Combined multiple solvent miscible flooding water injection technique for use in petroleum formations
Application Number
Publication Number
Application Date
May 4, 1973
Publication Date
September 24, 1974
Park Jack H
Tate Jack F
Allen Joseph C
Ries C G
E21b 43/20
E21B 43/34
E21B 43/16
E21B 43/40
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