procedures for the extraction of oil from underground lagerstaetten by emulsionsfluten.

摘要

Extensively emulsion-free oil is recovered from a subterranean reservoir of medium or high salinity by forcing an emulsion, e.g., of oil, into an injection well. Carboxymethylated ethoxylate is utilized as the emulsifier and is selected so that the phase inversion temperature of the system:oil of reservoir/formation water/tenside/optional additives lies 0 DEG -10 DEG C. above the reservoir temperature.