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测定分属4种类型的10余种常用表面活性剂的表/界面张力和润湿性(相对润湿角)。根据测试结果并考虑相互间的协同效应和价格,研发了由20%降低表面张力能力强的FSK(临界胶束浓度FSK水溶液的表面张力为25.3 mN/m)、40%降低界面张力能力强的CTAB(临界胶束浓度CTAB水溶液与煤油间的界面张力为2.0 mN/m)、10%可增加接触角的OP-10(1.6 g/L OP-10的20%盐酸溶液在石英砂上的接触角为69.1°)及辅助表面活性剂组成的高效助排剂FOC。FOC在酸液中与各种添加剂配伍,表/界面活性高,加入200 mg/L FOC的20%盐酸溶液的表面张力为26.3 mN/m,与煤油间的界面张力为2.1 mN/m,助排率为85.9%,热稳定性好。74低渗区块741313油井经检泵、洗井作业后受到严重水伤害,产出液含水100%,注入含0.5%FOC的前置液、8%盐酸及8%/2%土酸+5%醋酸后,含水降至51.6%,日产油恢复至4.8 t。图9表2参5。
Determining the table / interfacial tension and wettability (relative wetting angle) of more than 10 commonly used surfactants belonging to 4 types. According to the test results and considering the synergistic effect with each other and price, FSK (surface tension of 25.3 mN / m for critical micelle concentration FSK aqueous solution) developed by 20% of high surface tension reducing ability and 40% of low interfacial tension The contact angle of OP-10 (1.6 g / L 20% hydrochloric acid solution of OP-10 on quartz sand) was 10% for CTAB (interfacial tension between aqueous solutions of micelles and critical micelle concentration 2.0 mN / m) 69.1 °) and co-surfactants composed of efficient effervescent FOC. FOC is compatible with various additives in acid solution and its surface / interface activity is high. The surface tension of 20% hydrochloric acid solution with 200 mg / L FOC is 26.3 mN / m and the interfacial tension with kerosene is 2.1 mN / m. Row rate of 85.9%, good thermal stability. 74 Low permeability block 741313 The well was subjected to serious water injury after it was tested and the well was hydraulically discharged. The effluent contained 100% water and was injected with a preflush solution containing 0.5% FOC, 8% hydrochloric acid and 8% / 2% % Acetic acid, the water dropped to 51.6%, Nissan oil recovery to 4.8 t. Figure 9 Table 2 Reference 5.