三次采油用表面活性剂优选方法研究

针对三次采油用表面活性剂筛选方法复杂等问题，建立了表面活性剂降低油水界面张力模型。在原油组成的分析、表面活性剂性能评价的基础上，根据原油特征基团、烃类分子结构与表面活性剂结构间的内在关系，开展表面活性剂筛选方法研究。实验结果表明，原油与适用的表面活性剂之间存在一定构效关系，可根据不同油藏原油结构特征优选出适用的不同结构表面活性剂。

Optimal method study on Surfactant in tertiary recovery

In view of the complication of surfactant screening in tertiary recovery, the surfactant model reducing oil-water intension has been established so as to optimize the surfactant screening method. The surfactant screening method has been studied based on the analysis of crude component, surfactant performance evaluation, characteristic base group of crude oil and the intrinsic relationship between hydrocarbon molecular structure and surfactant structure. The study results show that there is certain functional relationship between crude and the applied surfactant. Thus, the applied surfactant with different structures can be optimized based on the crude structure features in different reservoirs.