Waterflood oil recovery process employing divalent ion...

Details Waterflood oil recovery process employing divalent ion... Waterflood oil recovery process employing divalent ion...

E - Fixed Constructions

21

B

31/16

E21B 43/20 (2006.01) C09K 8/584 (2006.01) E21B 43/22 (2006.01)

Patent

CA 1081442

WATERFLOOD OIL RECOVERY PROCESS EMPLOYING DIVALENT ION TOLERANT SURFACTANT SYSTEMS Abstract of the Disclosure Waterflooding technique for the recovery of oil from subterranean oil reservoirs in which an ether-linked methane sulfonate is employed as a surfactant in at least a portion of the water injected into the oil reservoir. The ether-linked methane sulfonate is compatible with relatively high concentrations of divalent metal ions. It may be employed as a co-surfactant to stabilize hydrocarbon sulfonate surfactants to relatively high divalent metal ion concentrations. -1-

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