耐温抗盐型嵌段聚醚类阴-非两性离子表面活性剂的制备与性能评价

Preparation and Performance Evaluation of Polyether Anionic-nonionic Surfactant with Temperature Resistance and Salt Tolerance

张 瑶 付美龙 侯宝峰 吴海俊 江厚顺

ZHANG Yao，FU Meilong，HOU Baofeng， WU Haijun，JIANG Houshun

为满足江汉油田周16井区高温高盐油藏的驱油要求， 以苯酚和苯乙烯为原料， 通过醚化及酯化反应合成了一种耐温抗盐型聚氧乙烯聚氧丙烯嵌段聚醚类阴-非两性离子表面活性剂 PPS。研究了 PPS与脂肪醇聚氧乙烯醚硫酸盐 （AES） 复配体系的界面张力、 耐温抗盐性能、 动态吸附规律和驱油性能。结果表明， 复配体系的界面活性良好， PPS与 AES总质量分数为 0.1%、 二者摩尔比为 1∶1的复配体系油水界面张力可达 1.39×10-2 mN/m， 且经140℃高温处理后仍保持在 10-2 mN/m数量级； 复配体系耐盐性较好， 在矿化度为 30×104 mg/L或 Ca2+ 质量浓度3000 mg/L的条件下， 体系油水界面张力保持在 10-2 mN/m数量级； 复配体系在在岩心表面的饱和吸附量为 0.097mg/g砂， 且动态吸附损耗小于单一表面活性剂； 复配体系驱油效果较好， 在均质岩心水驱含水率达到 65%时， 以0.05 mL/min注入速度转注 0.4 PV PPS/AES复配溶液， 驱油效率最大增幅可达 22.53%； 在非均质岩心中， 复配体系提高采收率的最大增幅为 19.8%。PPS/AES复配体系可用于江汉油田周 16井区油藏驱油。图5表 6参12

In order to meet the oil displacement requirements of high temperature and high salinity reservoirs of Zhou16 well area in Jianghan oilfield，a kind of polyoxyethylene polyoxypropylene block polyether anionic-nonionic surfactant（PPS）was synthesized from phenol and styrene by etherification and esterification reaction. The interfacial tension，temperature and salt resistance， dynamic adsorption and oil displacement performance of PPS/alcohol ether sulphates（AES）compound system were studied. The results showed that the interface activity of compound system was good. The oil-water interfacial tension of PPS/AES compound system with 0.1% mass fraction and 1∶1 molar ratio could reach 1.39×10-2 mN/m，and that remained at the order of 10-2 mN/m after being treated at 140℃. The compound system had good salt tolerance. Under the condition of mineralization degree of 30×104 mg/L or Ca2+ mass concentration of 3000 mg/L，the oil-water interfacial tension of the system maintained at the order of 10-2 mN/m. The saturated adsorption capacity of compound system on the core surface was 0.097 mg/g sand，and the dynamic adsorption loss was less than that of a single surfactant. The compound system had better oil displacement effect. When the water content of water flooding in homogeneous core was 65% ，the maximum increment of oil displacement efficiency could reach 22.53% after transferring 0.4 PV PPS/AES at the injection speed of 0.05 mL/min. In heterogeneous core，the maximum increase of oil recovery rate of compound system was 19.8%. The PPS/AES compound system could be used for the oil displacement of Zhou16 well area in Jianghan oilfield.