Numerical modelling of multiphase subsurface flow in the presence of fractures
Numerical modelling of multiphase subsurface flow in the presence of fractures
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DOI：
10.1685/journal.caim.380
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发表时间：
2011-12
影响因子：
1.3
通讯作者：
A. Fumagalli;A. Scotti
中科院分区：
文献类型：
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作者：
A. Fumagalli;A. Scotti
地下水流受多孔介质非均匀性的影响，特别是受断层和大裂缝的影响，这些断层和大裂缝是水流的优先通道。在这项工作中，我们提出了一个强大的数值方法模拟两相达西流在非均质介质中，并提出了一种可能的处理裂缝的扩展有限元法，XFEM，并耦合到一个简化的模型内的裂缝流动。扩展有限元的使用允许处理与底层网格不一致的裂缝，从而增加了所提出的方案对现实问题的模拟的适用性，例如裂缝盆地中的石油运移，CO2储存或地下水流中的污染物扩散。
Subsurface flow is influenced by the heterogeneity of the porous medium and in particular by the presence of faults and large fractures which act as preferential paths for the flow. In this work we present a robust numerical method for the simulation of two- phase Darcy flows in heterogeneous media and propose a possible treatment of fractures by means of the extended finite element method, XFEM, and the coupling with a reduced model for the flow inside the fracture. The use of extended finite elements allows to handle fractures that are non conforming with the underlying mesh, thus increasing the applicability of the proposed scheme to the simulation of realistic problems such as oil migration in fractured basins, CO2 storage or pollutant dispersion in groundwater flows.