Reactivation of Fractures in Subsurface Reservoirs—A Numerical Approach Using a Static-Dynamic Friction Model
Fluid-induced slip of fractures is characterized by strong multiphysics couplings. Three physical processes are considered: Flow, rock deformation and fracture deformation. The fractures are represented as lower-dimensional objects embedded in a three-dimensional domain. Fluid is modeled as slightly compressible, and flow in both fractures and matrix is accounted for. The deformation of rock is inherently different from the deformation of fractures; thus, two different models are needed to describe the mechanical deformation of the rock. The medium surrounding the fractures is modeled as a linear elastic material, while the slip of fractures is modeled as a contact problem, governed by a static-dynamic friction model. We present an iterative scheme for solving the non-linear set of equations that arise from the models, and suggest how the step parameter in this scheme should depend on the shear modulus and mesh size.
This work was partially funded by the Research Council of Norway, TheMSES project, grant no. 250223, and travel support funded by Statoil, through the Akademia agreement.
- 2.W.M. Boon, J.M. Nordbotten, I. Yotov, Robust discretization of flow in fractured porous media (2016), ArXiv e-printsGoogle Scholar
- 6.E. Keilegavlen, A. Fumagalli, R. Berge, I. Stefansson, I. Berre, PorePy: an open-source simulation tool for flow and transport in deformable fractured rocks (2017), ArXiv e-printsGoogle Scholar
- 10.E. Ucar, E. Keilegavlen, I. Berre, J.M. Nordbotten, A finite-volume discretization for deformation of fractured media (2016), ArXiv e-printsGoogle Scholar
- 11.E. Ucar, I. Berre, E. Keilegavlen, Three-dimensional numerical modeling of shear stimulation of naturally fractured rock formations (2017), ArXiv e-printsGoogle Scholar
- 12.A. Zang, V. Oye, P. Jousset, N. Deichmann, R. Gritto, A. McGarr, E. Majer, D. Bruhn, Analysis of induced seismicity in geothermal reservoirs an overview. Geothermics 52(Supplement C), 6–21 (2014); Analysis of Induced Seismicity in Geothermal OperationsGoogle Scholar