Speaker
Description
Many subsurface and industrial porous media such as carbonate rocks, shales, filters, and catalysts possess multiscale porous structures, that play an important role in regulating pore-scale fluid flow and transport. A pore-network-continuum hybrid flow model is promising for numerical studies of a multiscale digital rock. It is, however, still prohibitive to the REV-size modeling because hundreds of millions of microporosity voxels may exist.
In this poster, I will introduce a novel and robust algorithm for coarsening microporosity voxels of a multiscale digital rock. Then, we combine coarsened microporosity grids with the pore network of resolved macropores to form efficient computational meshes shown in Fig. 1. Furthermore, a pore-network-continuum simulator is developed to simulate flow and transport in both synthesized multiscale digital rocks and realistic carbonate and tight rocks. I will show that the coarsening algorithm can reduce computational grids by over 90%, which substantially reduces computational costs. Meanwhile, coarsening microporosity has a minor impact on the predictions of absolute permeability, gas production curves, and breakthrough curves of solute transport. Finally, I will present the application of the hybrid model in the modeling of capillary pressure and relative permeability curves of Estaillades rocks and tight sandstones. The developed pore-network-continuum hybrid model aided by grid coarsening of microporosity serves as a useful numerical tool to study flow and transport in multiscale porous media.
References
Jiang, H., Shi, B., Qin, C., Arns, C., Hassanizadeh, S.M., 2026. Pore‐Scale Rock‐Typing and Upscaling of Relative Permeability on a Laminated Sandstone Through Minkowski Measures. Water Resour. Res. 62. https://doi.org/10.1029/2025WR041036
Shi, B., Jiang, H., Guo, B., Tian, J., Qin, C., 2024. Modeling of flow and transport in multiscale digital rocks aided by grid coarsening of microporous domains. J. Hydrol. 633, 131003. https://doi.org/10.1016/j.jhydrol.2024.131003
Shi, B., Rong, J., Jiang, H., Guo, B., Hassanizadeh, S.M., Qin, C.-Z., 2025. The pore-network-continuum modeling of two-phase flow properties for multiscale digital rocks. Adv. Water Resour. 206, 105138. https://doi.org/10.1016/j.advwatres.2025.105138
Zhang, L., Guo, B., Qin, C., Xiong, Y., 2024. A hybrid pore-network-continuum modeling framework for flow and transport in 3D digital images of porous media. Adv. Water Resour. 190, 104753. https://doi.org/10.1016/j.advwatres.2024.104753
| Country | China |
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