Surfactant waterflood method for the recovery of oil

Details Surfactant waterflood method for the recovery of oil Surfactant waterflood method for the recovery of oil

E - Fixed Constructions

21

B

166/33

E21B 43/24 (2006.01) C09K 8/584 (2006.01) C09K 8/60 (2006.01)

Patent

CA 1127962

ABSTRACT OF THE DISCLOSURE An improved surfactant waterflood method for the recovery of oil from a subterranean reservoir utilizing an anionic surface-active agent wherein an aqueous postflush slug containing a nonionic solubilizer is employed to minimize retention of the surface-active agent in the reservoir matrix. -I-

325083

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