Heijkoop Selwin, Rieder David, Moura Marcel, Rücker Maja, Spurin Catherine
Mechanical Engineering Department, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands.
Eindhoven Institute of Renewable Energy Systems, 5612 AZ Eindhoven, The Netherlands.
Entropy (Basel). 2024 Sep 10;26(9):774. doi: 10.3390/e26090774.
Understanding multiphase flow through porous media is integral to geologic carbon storage or hydrogen storage. The current modelling framework assumes each fluid present in the subsurface flows in its own continuously connected pathway. The restriction in flow caused by the presence of another fluid is modelled using relative permeability functions. However, dynamic fluid interfaces have been observed in experimental data, and these are not accounted for in relative permeability functions. In this work, we explore the occurrence of fluid fluctuations in the context of sizes, locations, and frequencies by altering the viscosity ratio for two-phase flow. We see that the fluctuations alter the connectivity of the fluid phases, which, in turn, influences the relative permeability of the fluid phases present.
理解多孔介质中的多相流对于地质碳储存或氢储存至关重要。当前的建模框架假设地下存在的每种流体都在其自身连续连通的路径中流动。由另一种流体的存在所导致的流动限制是使用相对渗透率函数来建模的。然而，在实验数据中观察到了动态流体界面，而相对渗透率函数并未考虑这些界面。在这项工作中，我们通过改变两相流的粘度比，在尺寸、位置和频率的背景下探索流体波动的发生情况。我们发现这些波动改变了流体相的连通性，进而影响了所存在流体相的相对渗透率。
