纳米驱油材料提高采收率研究进展、挑战及前景

系统总结了国内外已开展的纳米驱油材料研究进展，分类阐述了纳米二氧化硅、纳米金属氧化物、聚合物纳米微球以及碳纳米材料等在提高采收率中的应用效果；重点解析了现有纳米驱油材料的理化性能，及其在储层多孔介质中的驱油机理，包括纳米尺寸效应、润湿反转、结构分离压力和流度比改善等作用机制；展望了优势显著的纳米驱油材料在中国高含水、低渗透、致密油及页岩油等油藏类型中的应用潜力；指出纳米驱油材料在石油开发过程中所面临有关测试方法、数模准确性、材料多功能性、经济性及规模化生产等方面的科研难点及攻关方向，为未来纳米驱油材料提高采收率在更多领域的规模应用提供了理论基础和实验依据。

Research Progress,Challenge and Prospect of Nanoscale Oil-displacing Materials for Enhanced Oil Recovery

This review summarizes the research progress of nanoscale oil-displacing materials developed by various researchers, describes the application effect of silica nanoparticles, metal-oxide nanomaterials, polymer nanospheres and carbon nanomaterials, analyses the physical and chemical properties of existing nanoscale oil-displacing agents and their EOR mechanism in porous reservoir media, including nanometer-size effect, wettability alteration, structural disjoining pressure, mobility ratio improvement, and predicts the potential of nanoscale oil-displacing materials in high water cut reservoir, low permeability reservoirs, tight oil and shale oil in China. In addition, the review points out the challenges and research direction in the process of oilfield development, such as testing methods, accuracy of mathematical model, material versatility, economy and industrial production, and provides a theoretical and experimental basis for their large-scale application in EOR.