| 摘要 |
<p>23443-326 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.degree. C above the reservoir temperature. O.Z 4090CA</p> |
