| 摘要 |
<p>A process is disclosed for extraction of oil from subterranean reservoir rock formations by injection of a solution or dispersion of a carboxymethylated ethoxylate R-(OC3H6)m(OC2H4)nOCH2COOM in a mixture with a more hydrophobic tenside, for example a monoor dialkylbenzenesulfonate, a petroleum sulfonate or alkanesulfonate. The process is especially suited for reservoirs governed by strong temperature fluctuations or by a temperature gradient.</p> |
