Print Email Facebook Twitter Smoothed embedded finite-volume method (sEFVM) for modeling contact mechanics in deformable faulted and fractured porous media Title Smoothed embedded finite-volume method (sEFVM) for modeling contact mechanics in deformable faulted and fractured porous media Author Shokrollahzadeh Behbahani, S. (TU Delft Reservoir Engineering) Hajibeygi, H. (TU Delft Reservoir Engineering) Voskov, D.V. (TU Delft Reservoir Engineering) Jansen, J.D. (TU Delft Civil Engineering & Geosciences) Faculty Civil Engineering & Geosciences Date 2022 Abstract A smoothed embedded finite-volume modeling (sEFVM) method is presented for faulted and fractured heterogeneous poroelastic media. The method casts a fully coupled strategy to treat the coupling between fault slip mechanics, deformation mechanics, and fluid flow equations. This ensures the stability and consistency of the simulation results, especially, as the fault slip is implicitly found through an iterative prediction-correction procedure. The computational grid is generated independently for embedded faults and rock matrix. The efficiency is further enhanced by extending the finite-volume discrete space by introducing only one degree of freedom per fault element. The embedded approach can lead to an oscillatory stress field at the fault, which damages the robustness of the implicit slip detection strategy. To resolve this challenge, a smoothed embedded strategy is devised, in which the stress and slip profiles are post processed within the iterative loops by fitting the best curve based on a least-square error criterion. The sEFVM provides locally conservative mass flux and stress fields, on staggered grid. Its performance is further investigated for several proof-of-the-concept test cases, including a multiple fault system in a heterogeneous domain. Results indicate that the method develops a promising approach for field-scale relevant simulation of induced seismicity. Subject Coulomb friction lawEmbedded finite volume methodEnhanced finite volume methodFault slipFractured and faulted porous mediaReservoir geomechanics To reference this document use: http://resolver.tudelft.nl/uuid:eed77de2-0d9e-4fbd-9aaf-99d0c0031840 DOI https://doi.org/10.1016/j.jcp.2022.111143 ISSN 0021-9991 Source Journal of Computational Physics, 459 Part of collection Institutional Repository Document type journal article Rights © 2022 S. Shokrollahzadeh Behbahani, H. Hajibeygi, D.V. Voskov, J.D. Jansen Files PDF 1_s2.0_S0021999122002054_main.pdf 1.42 MB Close viewer /islandora/object/uuid:eed77de2-0d9e-4fbd-9aaf-99d0c0031840/datastream/OBJ/view