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- W2607265962 abstract "Abstract Hydrofracturing is an important technique in petroleum industry to stimulate well production. Yet the mechanism of induced fracture growth is still not fully understood, which results in some unsatisfactory wells even with hydrofracturing treatments. In this work we establish a more accurate numerical framework for hydromechanical coupling, where the solid deformation and fracturing are modeled by discrete element method and the fluid flow is simulated directly by lattice Boltzmann method at pore scale. After validations, hydrofracturing is simulated with consideration on the strength heterogeneity effects on fracture geometry and microfailure mechanism. A modified topological index is proposed to quantify the complexity of fracture geometry. The results show that strength heterogeneity has a significant influence on hydrofracturing. In heterogeneous samples, the fracturing behavior is crack nucleation around the tip of fracture and connection of it to the main fracture, which is usually accompanied by shear failure. However, in homogeneous ones the fracture growth is achieved by the continuous expansion of the crack, where the tensile failure often dominates. It is the fracturing behavior that makes the fracture geometry in heterogeneous samples much more complex than that in homogeneous ones. In addition, higher pore pressure leads to more shear failure events for both heterogeneous and homogeneous samples." @default.
- W2607265962 created "2017-04-28" @default.
- W2607265962 creator A5003589751 @default.
- W2607265962 creator A5072211574 @default.
- W2607265962 date "2017-05-01" @default.
- W2607265962 modified "2023-10-17" @default.
- W2607265962 title "Pore‐scale modeling of hydromechanical coupled mechanics in hydrofracturing process" @default.
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- W2607265962 doi "https://doi.org/10.1002/2017jb013989" @default.
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