FDEM-flow3D: A 3D hydro-mechanical coupled model considering the pore seepage of rock matrix for simulating three-dimensional hydraulic fracturing

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• 作者：Chengzeng Yan^a ; ^{yanchengzheng86@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; ^{yanchengzheng@bjut.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Hong Zheng^b
• 关键词：Finite discrete element method (FEMDEM) ; Hydraulic fracturing ; Hydro-mechanical coupling ; Pore seepage ; Calibration aperture ; Fluid-driven fractures
• 刊名：Computers and Geotechnics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：81
• 期：Complete
• 页码：212-228
• 全文大小：3818 K

文摘

A hydro-mechanical coupled model that can simultaneously consider the pore seepage of a rock matrix and the fracture seepage is proposed to simulate three-dimensional hydraulic fracturing. This model appropriately takes into account the fluid leak-off into the surrounding rock matrix from the fracture. Several examples are given to validate the seepage algorithms and the coupled model. The results suggest that this model can solve problems involving pore seepage and fracture seepage through simple pure fracture seepage. Moreover, it can reproduce the fluid pressure distribution and the crack initiation and propagation and consider the fluid loss during hydraulic fracturing.