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US 5,203,411 AGranted
Oil recovery process using mobility control fluid comprising alkylated diphenyloxide sulfonates and foam forming amphoteric surfactants
AssigneeThe Dow Chemical Company
InventorsRobert D. Dawe, Thomas Oswald, Ian A. Robson
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Abstract
The recovery of hydrocarbons from subterranean formations is improved by the use of a mobility control fluid comprising a mixture of at least one alkylated diphenyl oxide and at least one amphoteric surfactant. A preferred mobility control fluid comprises the disodium salt of hexyldiphenyloxide disulfonate and cocamido-2-hydroxypropyl sultaine.
Claims19
A method for recovering hydrocarbons from a subterranean formation which comprises injecting, sequentially or simultaneously, into the subterranean formation containing hydrocarbons,
- (1) a drive fluid selected from the group consisting of
- (a) a gas to drive the hydrocarbons,
- (b) a gas/aqueous fluid mixture to drive the hydrocarbons,
- (c) a miscible fluid to thin or solubilize and carry the hydrocarbons, and
- (d) a miscible fluid/aqueous fluid mixture to thin or solubilize and carry the hydrocarbons,
- from the formation to a producing well;
- and
- (2) a mobility control fluid of a surfactant/aqueous fluid mixture comprising a mixture of one or more alkylated diphenyl sulfonate surfactants and one or more foam forming amphoteric surfactants
- under conditions such that the hydrocarbon is recovered from the subterranean formation.
6 more elements
Dependencies are inferred from the claim text.