E - Fixed Constructions – 21 – B
Patent
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
Balzer Dieter
Balzer Dieter
Fetherstonhaugh & Co.
Huls Aktiengesellschaft
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