Application of X-ray CT investigation of CO2–brine flow in porous media
Application of X-ray CT investigation of CO2–brine flow in porous media
复制标题
DOI：
10.1007/s00348-015-1959-x
复制
发表时间：
2015-04
影响因子：
2.4
通讯作者：
Lanlan Jiang;Yu Liu;Yongchen Song;Mingjun Yang;Z. Xue;Yuechao Zhao;Jiafei Zhao;Yi Zhang;
中科院分区：
文献类型：
--
作者：
Lanlan Jiang;Yu Liu;Yongchen Song;Mingjun Yang;Z. Xue;Yuechao Zhao;Jiafei Zhao;Yi Zhang;
了解多孔介质中的两相流动对CO2地质封存研究具有重要意义。在这项研究中，我们进行了实验的CO2/盐水在多孔介质封存条件下，使用X射线CT技术的流动过程。实验中观察了相对渗透率、孔隙度非均质性和CO2饱和度等渗流特征。多孔介质填充有直径为0.2mm的玻璃珠。孔隙率沿着流动方向的分布是不均匀的，这是由于沿着流动方向的玻璃珠的直径和形状。CO2饱和度与孔隙度分布之间存在一定的关系，且随流量和分流比的不同而变化。多孔介质的非均匀性影响CO2的分布，此外，重力，分流，流量影响CO2的分布和饱和度。用稳态法绘制了相对渗透率曲线。计算结果与孔隙网络模型模拟的相对渗透率曲线吻合较好。
A clear understanding of two-phase flows in porous media is important for investigating CO2geological storage. In this study, we conducted an experiment of CO2/brine flow process in porous media under sequestration conditions using X-ray CT technique. The flow properties of relative permeability, porosity heterogeneity, and CO2saturation were observed in this experiment. The porous media was packed with glass beads having a diameter of 0.2 mm. The porosity distribution along the flow direction is heterogeneous owing to the diameter and shape of glass beads along the flow direction. There is a relationship between CO2saturation and porosity distribution, which changes with different flow rates and fractional flows. The heterogeneity of the porous media influences the distribution of CO2; moreover, gravity, fractional flows, and flow rates influence CO2distribution and saturation. The relative permeability curve was constructed using the steady-state method. The results agreed well with the relative permeability curve simulated using pore-network model.