This invention relates to foam-forming surfactant compositions having at least two surfactants whereof at least one is a sulfosuccinamate, and at least one is a sulfosuccinate, and optionally including, a solvent. Methods of recovering oil or gas by generating a foam, feeding the foam into a subterranean oil- or gas-bearing geological formation, and collecting mineral oil or natural gas driven by the foam in a production well, wherein the foam is generated by intimate mixing of one or more foam-forming surfactant compositions described herein with a gas in a foam generator, or by introduction of at least one of water and gases, together or intermittently or in alternating sequence, slugs of a gas which may be in a supercritical or non-supercritical state, and of water, wherein the foam-forming surfactant composition(s) can be admixed to the water or to the gas if the gas is in a supercritical state or be introduced separately as solution into the geological formation, are also provided.
本发明涉及泡沫形成表面活性剂组合物,该组合物具有至少两种表面活性剂,其中至少一种为
磺基琥珀酸酯,至少一种为
磺基琥珀酸酯,并可选择包括溶剂。通过产生泡沫、将泡沫送入地下含油或含气地层、以及在生产井中收集由泡沫驱动的矿物油或天然气来开采石油或天然气的方法,其中泡沫是通过在泡沫发生器中将本文所述的一种或多种泡沫形成表面活性剂组合物与气体亲密混合而产生的、或通过同时或间歇或交替引入
水和气体中的至少一种,气体可以是超临界或非超临界状态,
水也可以是超临界状态,其中泡沫形成表面活性剂组合物可以与
水或气体混合(如果气体是超临界状态),或作为溶液单独引入地层。