油气藏评价与开发 >
2023 , Vol. 13 >Issue 3: 305 - 312
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2023.03.005
CO2埋存中的状态方程研究进展与展望
收稿日期: 2022-12-08
网络出版日期: 2023-06-26
基金资助
联合基金项目“海上高温高压低渗透储层渗流流固耦合机理及表征方法研究”(U22B2073)
Research progress and prospect of state equation in CO2 storage
Received date: 2022-12-08
Online published: 2023-06-26
在废弃油气藏中进行CO2埋存,能够减少温室气体在大气中的直接排放量,是减缓温室效应的有效途径之一。改进常规的气液相平衡理论,应用热力学状态方程研究CO2-烃-地层水体系,对揭示CO2地下埋存的溶解机理具有十分重要的意义。总结了热力学状态方程对CO2-烃-地层水体系相平衡计算方面的国内外研究进展,指出其实际应用中的不足,分析了其发展趋势,包括:应进一步研究适用于非理想体系的状态方程和混合规则,准确预测该体系热力学性质变化规律;拓展研究体系的地层水离子差异,使之与真实CO2埋存条件相符合;将CO2中相态变化的物理过程与地层水中矿物溶解析出的化学过程耦合。
关键词: CO2埋存; CO2-烃-地层水体系; 状态方程; 热力学性质; 相平衡
王建猛 , 陈杰 , 吉礼东 , 刘荣和 , 张骞 , 黄东杰 , 颜平 . CO2埋存中的状态方程研究进展与展望[J]. 油气藏评价与开发, 2023 , 13(3) : 305 -312 . DOI: 10.13809/j.cnki.cn32-1825/te.2023.03.005
CO2 storage in abandoned oil and gas reservoirs can reduce the direct emissions of greenhouse gases in the atmosphere, which is one of the effective ways to mitigate the greenhouse effect. Improving the conventional gas-liquid phase equilibrium theory and applying the thermodynamic equation of state to study the CO2-hydrocarbon-groundwater system are of great significance to reveal the dissolution mechanism of CO2 buried in the subsurface. The research progress of thermodynamic equation of state in the phase equilibrium calculation of CO2-hydrocarbon-formation water system at home and abroad is summarized.The shortcomings in its practical application are pointed out, and its development trend is analyzed, including: the equation of state and mixing rules suitable for non-ideal systems should be further studied to accurately predict the change law of thermodynamic properties of the system; the expansion of the difference of formation water ions in the research system to make it consistent with the real CO2 storage conditions; the physical process of phase change in CO2 is coupled with the chemical process of mineral dissolution and precipitation in formation water.
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