Migration of carbon dioxide in sandstone under various pressure/temperature conditions: From experiment to simulation

饱和(图论) 二氧化碳 岩芯样品 磁导率 体积流量 相对渗透率 材料科学 地质学 垂直的 矿物学 土壤科学 机械 岩石学 石油工程 化学 岩土工程 芯(光纤) 复合材料 多孔性 几何学 有机化学 物理 组合数学 生物化学 数学
作者
Liang Xu,Qi Li,Matthew Myers,Cameron White,X. Cao
出处
期刊:Greenhouse Gases-Science and Technology [Wiley]
卷期号:12 (2): 233-248 被引量:1
标识
DOI:10.1002/ghg.2140
摘要

Abstract The pressure and temperature of a target CO 2 storage reservoir can significantly affect the migration and relative permeability characteristics which can ultimately determine the carbon storage capacity and storage integrity of target formations. To understand these impacts, a CO 2 core‐flooding experiment was conducted on a brine‐saturated sandstone containing a single clay interlayer perpendicular to the flow direction at a temperature of 313 K and a pressure of 8 MPa and the fluid distribution was monitored by a high‐resolution X‐ray computed tomography (X‐CT) scanner. Further, a one‐dimensional model was established to reproduce the CO 2 flow behavior inside the sample under the same experimental condition and then the model was extended to different temperatures (313 and 350 K) and pressures (6, 8, 12, and 17.4 MPa). The experimental results show that the CO 2 preferentially created high‐CO 2 ‐saturation flow pathways which then expanded until they were large enough to transport the CO 2 at the prescribed flow rate. The sub‐core scale heterogeneity also had significant effects on the CO 2 migration, forming a barrier to downstream flow. The simulation results show that at a given temperature, the CO 2 front migration velocity decreased with increasing reservoir pressure while the CO 2 saturation along the pathways increased. Comparing simulations when the reservoir pressure was the same, the front‐migration velocity increased with increasing temperature, and the CO 2 saturation along the pathways decreased. Meanwhile, the influence of temperature and pressure on CO 2 saturation distribution was more evident in the parts of the core with high residual brine saturation. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.
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