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以价格低廉的天然混合羧酸盐为表面活性剂，选择我国两种典型原油（酸值高者称Ｓ油；酸值低者为Ｄ油）为油相，应用正交试验设计，开展相态试验研究，得出复合驱油体系组成，通过时时界面张力测定，研究氯化钠、钙离子和镁离子和羧酸盐的浓度对驱油体系的影响。最后开展室内驱油模型试验，得到该体系所得水驱后的采收率达到４２．９％的好效果，为我国三次采油时在表面活性剂的选择上开辟了新途径。
The low cost of natural mixed carboxylates as the surfactant, choose two typical crude oil in our country (the highest acid value of S oil; the lower the acid value of D oil) as the oil phase, the application of orthogonal design phase to carry out the phase Based on the experiments, the composition of the composite flooding system was obtained. The interfacial tension was used to study the effect of sodium chloride, calcium ion, magnesium ion and carboxylate concentration on flooding system. Finally, indoor displacement model test was carried out to obtain the good effect of 42.9% recovery after the water flooding resulting from the system, which opened up a new way for the surfactant selection in China’s tertiary recovery.