不断提高原油采收率，一直是石油科技工作者的主要研究目标之一，化学驱作为有效的三次采油技术得到了广泛的关注。表面活性剂协同效应作为化学驱的关键理论，其机理和定量描述方法仍不成熟，研究表面活性剂的方法灵敏度较低，这已成为目前化学驱应用推广的瓶颈之一，也是研究的重点和难点。共振光散射作为高灵敏度的分析方法，已经广泛用于生物大分子、纳米粒子等的定量分析及相互作用研究。本项目拟通过共振光散射法研究三次采油用表面活性剂协同作用，研究内容包括：建立高灵敏度的表面活性剂共振光散射定量分析方法；研究二元复配表面活性剂体系的共振光散射行为，通过数学模型计算掌握表面活性剂相互作用与共振光散射信号的规律；结合实际生产中的二元复合驱油体系和泡沫驱油体系，探讨表面活性剂结构与协同作用之间的关系。通过本项目的研究，可以为化学驱油用表面活性剂的复配和应用提供新的思路和理论指导，进一步拓展三次采油技术在实际生产中的应用。

Improvement of the recovery rate of crude oil is one of the key objectives for scientists in the petroleum industry, and chemical flooding is an effective tertiary oil recovery technology. Surfactants synergistic effect is the critical theory for chemical flooding. In study on the synergistic effect, the lack of quantitative description models and the low sensitivity of the current experimental methods are two major problems, and thus make the bottlenecks of applications of chemical flooding. The resonance light scattering method has been widely used in the analysis and interaction study of the biomacromolecules and nanoparticles. In this project, we propose the resonance light scattering investigation of the synergistic effect of the surfactants for the enhanced oil recovery. The study of this project consists of the following parts: establishment of the high sensitive analytical method for the surfactants by the resonance light scattering technology; the resonance light scattering behavior of the surfactants compounded system, and establishment of a mathematical model for their interaction; the relationship between the structure and synergistic effect of surfactants in the combination flooding and the foam flooding. We hope to provide new ideas and theories for the surfactants compounded system, and expand the applications of the enhanced oil recovery technology in the production.