Abstract The sulfobetaine and sulfonate surfactants derived from 1,3-dialkyl glyceryl ethers were examined as surfactants for enhanced oil recovery free of alkali in high salinity and high temperature reservoir conditions. The surfactants containing polyoxypropylene-polyoxyethylene chain are relatively hydrophilic and the sulfobetaines derived from symmetric and asymmetric 1,3-dialkyl glyceryl ethers are relatively hydrophobic. The binary mixtures at appropriate molar fraction ratio are well soluble in connate water with a total salinity as high as 20,000 mg/L including 800 mg/L Ca2+ and 40 mg/L Mg2+, and can reduce the interfacial tension between the connate water and crude oil to 10−3∼10-4 mN/m magnitude at and beyond 60 °C in a wide total concentration range, 0.1∼5 mM. In addition, the formulations show good resistance to the adsorption by quartz sands and prefer to form crude oil-in-connate water (O/W) emulsions.

中文翻译：

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1,3-二烷基甘油醚衍生物作为表面活性剂在高盐度和高温油藏条件下提高采收率

摘要 研究了衍生自 1,3-二烷基甘油醚的磺基甜菜碱和磺酸盐表面活性剂作为在高盐度和高温油藏条件下提高无碱油采收率的表面活性剂。含有聚氧丙烯-聚氧乙烯链的表面活性剂相对亲水，衍生自对称和不对称1,3-二烷基甘油醚的磺基甜菜碱相对疏水。适当摩尔分数的二元混合物在总盐度高达 20,000 mg/L（包括 800 mg/L Ca2+ 和 40 mg/L Mg2+ ）的原生水中具有良好的溶解性，并能降低原生水与原油之间的界面张力。在 60 °C 及以上，在 0.1 至 5 mM 的宽总浓度范围内，油达到 10-3∼10-4 mN/m 量级。此外，