油田相对渗透率改善体系研究进展

Research Progress of Relative Permeability Modifiers System Used in Oilfield

翟恒来 齐 宁 樊家铖 张翔羽 孙 逊

ZHAI Henglai， QI Ning， FAN Jiacheng， ZHANG Xiangyu， SUN Xun

相对渗透率改善（简称相渗改善）剂可大大降低油藏水相渗透率而对油相渗透率影响较小， 实现控水稳油 增产。传统的相渗改善体系一般是高分子水溶性聚合物或者弱凝胶体系， 主要用来封堵高渗透、 大孔道及裂缝 性油气藏。纳米 SiO2相渗改善体系具有表面效应、 体积效应、 量子尺寸效应等优点， 可进入微米级和纳米级孔喉 并形成纳米膜， 实现低渗-特低渗油气藏的高效开发。本文介绍了国内外相渗改善体系的研究现状和作用机理， 总结了纳米 SiO2用于油田相渗改善时的体系和效果， 分析了其相渗改善作用机理， 指出了该体系在制备、 评价、 机理分析、 应用推广等过程中存在的问题及发展趋势。图 3参44

Relative permeability modifiers（RPMs）could greatly reduce water phase permeability and had little effect on oil phase permeability in reservoir which could achieve water control and enhance oil production. The traditional RPMs system was generally water-soluble polymer with high molecular mass or weak gel system， which mainly used to block oil and gas reservoirs with high permeability， large pores and fractures. Nano-SiO2 RPMs systems had the advantages of surface effect， volume effect， quantum size effect and so on. They could enter micron and nanometer pore throats which led to the formation of nano-film and achieved effective development of low and ultra-low permeability oil and gas reservoirs. The worldwide research status and mechanism of RPMs system were introduced in this paper. The composition and effect of nano-SiO2 which used in the improvement of oil and water phase permeability were summarized，along with its function mechanism. Finally the problems and development trends in the process of preparation， evaluation， mechanism analysis and application promotion of nano-phase RPMs were pointed out.