Wells – Processes – Distinct – separate injection and producing wells
Patent
1976-05-24
1977-08-16
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166274, 252 855D, E21B 4322
Patent
active
040420302
ABSTRACT:
Waterflooding process for the recovery of oil in which at least a portion of the injected water is thickened by the addition of a sulfonate surfactant and a C.sub.4 -C.sub.6 aliphatic alcohol having a hydrocarbon chain link of at least 3 carbon atoms. The action of the surfactant-alcohol system in increasing the viscosity of the water varies with the monovalent salt salinity of the water and the ratio of the amount of the sulfonate surfactant to the sum of the amounts of the sulfonate surfactant and alcohol in the water. A relatively viscous aqueous mobility control slug containing a sulfonate-alcohol system as previously described may be preceded by an aqueous surfactant slug. The aqueous solution of sulfonate surfactant and alcohol may be formulated and then aged for a time to allow the development of viscosity prior to injection into the oil reservoir. This viscosity development may be accelerated by heating.
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patent: 3330343 (1967-07-01), Tosch et al.
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patent: 3506071 (1970-04-01), Jones
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patent: 3983940 (1976-10-01), Carpenter et al.
Jones, S. C. et al., "Cosurfactants in Micellar Systems Used for Tertiary Oil Recovery", 5PE Paper 5566, 50th Annual Fall Meeting of SPE of AIME, Dallas, Texas, Sept. 28 - Oct. 1, 1975.
Gilliland, H. E. et al., "Pilot Flood Mobilizes Residual Oil", The Oil and Gas Journal, Jan. 1976, pp. 43-47.
Burdyn Ralph F.
Savins Joseph George
Waite Jerry M.
Huggett C. A.
Jackson William D.
Mobil Oil Corporation
Novosad Stephen J.
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