Process of extraction of oil by means of water flooding

Details Process of extraction of oil by means of water flooding Process of extraction of oil by means of water flooding

E - Fixed Constructions

21

B

31/16

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

Patent

CA 1262820

23443-326 Abstract A process is disclosed for increasing the injectability of injection wells in oil extraction by means of waterflooding, by injecting a solution, dispersion, or emulsion of carboxymethylated oxethylates of the formula R - O (C3H6O)m(C2H4O)nCH2COOM in formation water or flooding water and optionally crude oil into the injection well. The surfactant is selected so -that -the phase inversion temperature of the system of reservoir oil/formation water or flooding water/tenside/ optional additives is at least 12° C above the reservoir temperature. O.Z 4090CA

517165

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