Multivalent ion tolerant steam-foaming surfactant composition fo

Details Multivalent ion tolerant steam-foaming surfactant composition fo Multivalent ion tolerant steam-foaming surfactant composition fo

1991-09-12

1993-03-16

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166273, 166294, 166303, 166309, 252 8554, E21B 4322, E21B 4324

Patent

active

051936186

ABSTRACT:
A method for recovering hydrocarbons from a reservoir during gas injection into the reservoir comprises at least periodically injecting a gas comprising steam and a foam-forming composition which includes at least one steam foam diversion surfactant into a reservoir which contains at least one multivalent cation. The foam forming composition comprises water, an effective foam-forming amount of the surfactant which preferably comprises an alkyl aromatic sulfonate and a precipitation control additive. This precipitation-control additive preferably comprises an alpha-olefin sulfonate dimer (AOSD). The method further comprises contacting the hydrocarbons in the resevoir with the foam and the gas so as to assist in the recovery of hydrocarbons from the reservoir.

REFERENCES:
patent: 4556107 (1985-12-01), Duerksen et al.
patent: 4576232 (1986-03-01), Duerksen et al.
patent: 4607700 (1986-08-01), Duerksen et al.
patent: 4643256 (1987-02-01), Dilgren et al.
patent: 4682653 (1987-07-01), Angstadt
patent: 4820429 (1989-04-01), Lim
patent: 4860828 (1989-08-01), Oswald et al.
patent: 5000262 (1991-03-01), Danzik
patent: 5005644 (1991-04-01), Wall et al.
SPE/DOE 17361, "Surfactants for Mobility Control in High-Temperature Steam-Foam Applications" by H. M. Muijs et al, 1988.

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