A modeling approach for analysis of coupled multiphase fluid flow, heat transfer, and deformation in fractured porous rock |
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| Authors: | J. Rutqvist Y. -S. Wu C. -F. Tsang G. Bodvarsson |
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| Affiliation: | 1. Department of Petroleum Engineering, Colorado School of Mines, Golden, CO, USA;2. School of Petroleum Engineering, China University of Petroleum, East China, Qingdao, People’s Republic of China;1. Earth Sciences Division, Lawrence Berkeley National Laboratory (LBNL), 1 Cyclotron Rd, MS 74R316C, Berkeley, CA 94720, USA;2. Chair in Waste Disposal and Geomechanics, Clausthal University of Technology (TU Clausthal), Erzstr. 20, Clausthal-Zellerfeld 38678, Germany;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering, Ministry of Education, Wuhan University, Wuhan 430072, China;1. Department of Civil Engineering, Tsinghua University, Beijing, China;2. Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, Hebei, China;1. Computational Earth Science Group (EES-16), MS T003, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;2. Geophysics Group, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. Korea Atomic Energy Research Institute, Daejeon, South Korea;2. Department of Energy Resources Engineering, Seoul National University, Seoul, South Korea;3. Lawrence Berkeley National Laboratory, Berkeley, United States |
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| Abstract: | This paper presents the methodology in which two computer codes—TOUGH2 and FLAC3D—are linked and jointly executed for coupled thermal–hydrologic–mechanical (THM) analysis of multiphase fluid flow, heat transfer, and deformation in fractured and porous rock. TOUGH2 is a well-established code for geohydrological analysis with multiphase, multicomponent fluid flow and heat transport, while FLAC3D is a widely used commercial code that is designed for rock and soil mechanics with thermomechanical and hydromechanical interactions. In this study, the codes are sequentially executed and linked through external coupling modules: one that dictates changes in effective stress as a function of multi-phase pore pressure and thermal expansion, and one that corrects porosity, permeability, and capillary pressure for changes in stress. The capability of a linked TOUGH-FLAC simulator is demonstrated on two complex coupled problems related to injection and storage of carbon dioxide in aquifers and to disposal of nuclear waste in unsaturated fractured porous media. |
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| Keywords: | Modeling fractured rock coupled deformation fluid flow |
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