二氧化碳在油气田地质封存中溶解物性的研究进展

Research Progress of Dissolved Physical Properties of CO2 during Geological Storage in Oil and Gas Fields

王军良 李桂璇 周义明 潘志彦

WANG Junliang LI Guixuan ZHOU Yiming PAN Zhiyan

为减缓温室气体的排放， 二氧化碳 （CO2） 地质封存技术已成为研究热点。由于 CO2封存于油气田既能实现CO2减排又能提高原油采收率（EOR）， 是一项具有大规模 CO2减排潜力、 控制温室气体排放、 提高原油采收率的重要技术之一。CO2注入油气中溶解时的 CO2溶解度、 扩散系数及因溶解而引起的体系密度、 体积变化等是该技术发展的重要理论基础。本文介绍了 CO2油气封存技术， 综述了 CO2封存于油气田溶解过程中的 CO2溶解度和扩散系数， 及体系膨胀系数和密度等溶解物性参数的研究进展， 指出当前研究中存在的不足和今后的发展方向。表 5参89

Carbon dioxide（CO2）geological storage technology had become a research hotspot with the concern of greenhouse gases emission. CO2 storage in oil and gas fields could help reducing greenhouse gases emission and enhancing oil recovery（EOR） .Therefore，it became one of the most important technologies to reduce large-scale CO2 or other greenhouse gases emission and enhance oil recovery. The solubility and diffusion coefficient of CO2during CO2 injection in oil reservoir，the density and volume change of system caused by CO2 dissolution were key theoretical basis for CO2 geological storage technology. In this paper，the research progress on those parameters were reviewed，and the technology of CO2 for EOR was introduced. In addition，the shortcomings in the current research and the development direction were presented.