绿色环保型表面活性剂驱油体系研究

Research on Green Surfactant Flooding Systems

王增宝赵修太于子洲付敏杰

WANG Zeng-Bao ZHAO Xiu-Tai YU Zi-Zhou FU Min-Jie

考察了绿色环保型表面活性剂YCH-601及其复配体系的驱油性能。生物毒性评价实验表明YCH-601无毒、无皮肤刺激及过敏反应，属于绿色环保型表面活性剂。YCH-601及其复配体系室内评价实验结果表明，与其他几种油田常用表面活性剂相比，YCH-601对原油的乳化效果较好；在砂岩表面的吸附量较低，其稳定的动态吸附量为0．123mg／g砂；YCH-601降低表面张力效果最好，使用浓度最低，其最低表面张力为26．7mN／m。YCH．601复配体系AON、ASN体系降低油水界面张力效果较好，耐Na＋能力分别为20、50g／L，耐Ca2＋能力分别为1500、4000mg／L，并且经150q2高温处理后，油水界面张力仍在10^-3 mN／m数量级。YCH-601及其复配体系提高采收率效果好于其他表面活性剂，采收率高达22．5％。图9表4参14

The oil displacement properties of an environment friendly surfactant named YCH-601 and its combination system were studied.Biological toxicity evaluation test showed that YCH-601 had no toxicity,no skin irritation and no allergic reaction.The laboratory experiment results showed that YCH-601 had a better emulsifying capability to crude oil than that of usual surfactants used in oilfield.And the absorption of YCH-601 on the surface of sandstones was lower with a sustained dynamic absorption of 0.123 mg/g sand.Compared with other surfactants,surface tension reducing effect of YCH-601 was the best with the lowest working concentration,whose lowest surface tension was of 26.7 mN/m.Its combination systems of AON and ASN,which could reduce surface tension effectively,provided high resistance to Na+ which concentration was of 20 g/L and 50 g/L respectively,and that to Ca2+ was of 1500 mg/L and 4000 mg/L respectively.Moreover,after treated with high temperature of 150℃,both systems could still reduce the oil-water interfacial tension to the order of 10-3 mN/m.Both YCH-601 and its combination systems could enhance the oil recovery better that other surfactants,and the enhanced oil recovery was as high as 22.5%.