改性纳米SiO₂渗吸驱油技术在实现超低渗油藏提高采收率方面具有优势。从结构分离压力、改变储层润湿性、降低油水界面张力和密度差异角度分析了改性纳米SiO₂的渗吸驱油机理,概述了纳米SiO₂化学改性、半化学/物理吸附改性及原位合成改性的国内外研究现状,展望了改性纳米SiO₂在超低渗油藏提高采收率领域的未来研究重点。

Modified nano-SiO₂ imbibition flooding technology has advantages in realizing enhanced oil recovery in ultra-low permeability reservoirs.The imbibition flooding mechanism of modified nano-SiO₂ is summarized and analyzed from the aspects of structural separation pressure,changing reservoir wettability,reducing oil-water interfacial tension and density difference.Global research status in chemical modification,semi-chemical/physical adsorption modification and in-situ synthesis modification of nano-SiO₂ is summarized.The future research focus of modified nano-SiO₂ in the field of enhanced oil recovery in ultra-low permeability reservoirs is prospected.

侯向前(1988-),男,硕士,高级工程师,从事压裂酸化新技术、新材料研究,houge4232@126.com