孔隙尺度下超临界CO2驱水两相流数值模拟

doi:10.16085/j.issn.1000-6613.2017-0567

化工进展 ›› 2017, Vol. 36 ›› Issue (11): 3955-3962.DOI: 10.16085/j.issn.1000-6613.2017-0567

孔隙尺度下超临界CO₂驱水两相流数值模拟

姜水生, 赵万东, 张莹, 李培生, 王昭太, 钟源

南昌大学机电工程学院, 江西南昌 330031

收稿日期:2017-03-31 修回日期:2017-06-22 出版日期:2017-11-05 发布日期:2017-11-05
通讯作者: 张莹,博士,教授,研究内容为复杂热流场模拟。
作者简介:姜水生(1957-),男,硕士,教授。
基金资助:
国家自然科学基金（51566012，11562011）、及江西省科技厅支撑项目（2009BGA01800）及江西省研究生创新基金自然科学基金（2015BAB206048）。

Pore-scale two-phase numerical simulation of supercritical carbon dioxide displacement of water

JIANG Shuisheng, ZHAO Wandong, ZHANG Ying, LI Peisheng, WANG Zhaotai, ZHONG Yuan

SchoolCollege of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330031, Jiangxi, China

Received:2017-03-31 Revised:2017-06-22 Online:2017-11-05 Published:2017-11-05

摘要/Abstract

摘要： 以咸水层封存二氧化碳（CO₂）为研究背景，利用流体体积函数（Volume of Fluid，（VOF）多相流模型建立孔隙尺度多孔介质计算模型，研究了超临界二氧化碳（ScC-CO₂）注入到含水多孔介质中的两相运移规律。对比分析了毛细管数、地质封存压力、ScC-CO₂注射温度、两相表面张力系数、接触角等因素对两相运移速率以及驱替效率的影响，同时将不同毛细管数下的驱替效率与实验数据进行了对比。研究结果表明，随着毛细管数的增大，驱替效率先减小然后趋于稳定，数值模拟与实验数据吻合良好；在同一孔隙率下，在壁面表现为亲水性时，壁面润湿性越好，驱替速率越快，但驱替效率有所下降；同时毛细管数越小、地质封存压力越低、注射温度越高、张力系数越小驱替速率越快，且驱替效率越高。

关键词: 超临界二氧化碳, 咸水层封存, 孔隙尺度, 数值模拟, 两相流, 毛细管数, 接触角

Abstract: The computational method of pore-scale porous media is established by using Volume of Fluid(VOF)numerical simulation method based on the background of CO₂ storage in Saline aquifer,and the migration mechanism of supercritical carbon dioxide(ScC-CO₂)injection into porous media containing water is studied. The effects of capillary number,geological storage pressure,ScC-CO₂ injection temperature,two-phase surface tension coefficient and contact angle on the two-phase migration rate and the displacement efficiency were analyzed. At the same time,displacement efficiency was compared with experimental data under different capillary numbers. The result showed that with the increase of capillary number, displacement efficiency decreases first and then becomes stable,and the numerical simulation of displacement efficiency agrees well with experimental data under different capillary numbers. Under the same porosity,when wall surface is hydrophilic,wall surface wettability is better. The faster the rate of displacement,while the displacement efficiency decreased. At the same time,the lower geological storage pressure,the higher the injection temperature. Small surface tension coefficient has a higher displacement rate and efficiency.

Key words: supercritical carbon dioxide, saline aquifer storage, pore-scale, numerical simulation, two-phase flow, capillary number, contact angle

中图分类号:

TK124
TE122

姜水生, 赵万东, 张莹, 李培生, 王昭太, 钟源. 孔隙尺度下超临界CO₂驱水两相流数值模拟[J]. 化工进展, 2017, 36(11): 3955-3962.

JIANG Shuisheng, ZHAO Wandong, ZHANG Ying, LI Peisheng, WANG Zhaotai, ZHONG Yuan. Pore-scale two-phase numerical simulation of supercritical carbon dioxide displacement of water[J]. Chemical Industry and Engineering Progress, 2017, 36(11): 3955-3962.

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孔隙尺度下超临界CO₂驱水两相流数值模拟

Pore-scale two-phase numerical simulation of supercritical carbon dioxide displacement of water

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