Wells – Processes – With indicating – testing – measuring or locating
Patent
1976-03-12
1977-05-17
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
166273, E21B 4322
Patent
active
RE0292192
ABSTRACT:
The efficiency of an oil recovery process of the type wherein an aqueous surfactant solution is injected into a subterranean, petroleum-containing formation is increased by determining the optimum range of salinity and hardness e.g. calcium and magnesium, for the particular surfactant being used, and formulating an aqueous preflush solution, the salinity and hardness of which are within the range for optimum surfactant effectiveness, and adding an effective amount of hydrophilic polymer to yield a suitable viscosity greater than the formation water viscosity, and injecting the aqueous preflush solution into the formation prior to injection of the surfactant solution. The viscous, controlled salinity and hardness solution displaces the formation water effectively, thereby insuring that the salinity and hardness of the surfactant solution will be at or near an optimum value for oil recovery. Suitable hydrophilic polymers include polyacrylamide, polysaccharide, polyvinyl aromatic sulfonate, polyethylene oxide, methyl cellulose, or carboxy methyl cellulose.
REFERENCES:
patent: 2356205 (1944-08-01), Blair, Jr. et al.
patent: 3261399 (1966-07-01), Coppel
patent: 3372748 (1968-03-01), Cook
patent: 3399725 (1968-09-01), Pye
patent: 3421582 (1969-01-01), Fallgatter
patent: 3467190 (1969-09-01), Dunlap et al.
patent: 3478823 (1969-11-01), Murphy
patent: 3482631 (1969-12-01), Jones
patent: 3500921 (1970-03-01), Abrams et al.
patent: 3648770 (1972-03-01), Sydansk et al.
patent: 3707187 (1972-12-01), Knight
patent: 3741307 (1973-06-01), Sandiford et al.
Cardenas Ricardo L.
Carlin Joseph T.
Flournoy Kenoth H.
Novosad Stephen J.
Park Jack H.
Ries Carl G.
Texaco Inc.
Whaley Thomas H.
LandOfFree
Surfactant oil recovery process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surfactant oil recovery process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surfactant oil recovery process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1825734