Name:HF_simulation
Description: In our research we are considering the popular thecnicue to simulate hydraulic fracturing (HF) based on Discrete Element Method (DEM). The closest analog of our approach is the platform of Livermore Distinct Element Code (LDEC).
A variety of inter-dependent physical mechanisms, including flow within the discrete fracture network in the presence of changing joint permeability, rock deformation caused by both interaction between the pressurized fluid in the joint and changing stresses within the rock matrix, and evolution of the fracture network and rock matrix topology as fractures propagate over time, are appropriately handled in LDEC by using two numerical models:
• A FEM geomechanics solver for linearly elastic solid and a linear elastic fracture mechanics (LEFM) component to resolve trajectory and growth rate of propagating fractures.
• A finite volume method (FVM) hydrodynamics flow solver for viscous, laminar flow.
In our approach, to simulate flow within the fracture network we use the same finite volume method. However, to simulate rock deformation and changing stresses within the rock matrix we use different technique. In opposite to LDEC where are used FEM geomechanics solver, we use RMIB (Real Multidimensional Internal Bond) solver – one of variation of DEM method.
The reason to choose RMIB is the possibility to organize the compact and simple computational process. It give us possibility maximum effective to implement HF simulation on SIMD parallel platforms like GPGPU. To implement the parallel version of solver we use CUDA SDK. In our hard opinion, this is real way to move this scientific approach of HF simulation to practical level.
Abstract: In our research we are considering the popular thecnicue to simulate hydraulic fracturing (HF) based on Discrete Element Method (DEM). The closest analog of our approach is the platform of Livermore Distinct Element Code (LDEC).
A variety of inter-dependent physical mechanisms, including flow within the discrete fracture network in the presence of changing joint permeability, rock deformation caused by both interaction between the pressurized fluid in the joint and changing stresses within the rock matrix, and evolution of the fracture network and rock matrix topology as fractures propagate over time, are appropriately handled in LDEC by using two numerical models:
• A FEM geomechanics solver for linearly elastic solid and a linear elastic fracture mechanics (LEFM) component to resolve trajectory and growth rate of propagating fractures.
• A finite volume method (FVM) hydrodynamics flow solver for viscous, laminar flow.
In our approach, to simulate flow within the fracture network we use the same finite volume method. However, to simulate rock deformation and changing stresses within the rock matrix we use different technique. In opposite to LDEC where are used FEM geomechanics solver, we use RMIB (Real Multidimensional Internal Bond) solver – one of variation of DEM method.
The reason to choose RMIB is the possibility to organize the compact and simple computational process. It give us possibility maximum effective to implement HF simulation on SIMD parallel platforms like GPGPU. To implement the parallel version of solver we use CUDA SDK. In our hard opinion, this is real way to move this scientific approach of HF simulation to practical level.
Created:2016-06-16
Last updated:2016-06-16
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