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Table of Contents
Preface; Acknowledgments; Contents; About the Authors; 1 Introduction; 1.1 Geothermal Energy; 1.2 Enhanced Geothermal Systems; 1.2.1 Concept; 1.2.2 Stimulation; 1.2.3 EGS Types; 1.3 Reservoir Modeling; 1.3.1 Objectives; 1.3.2 Workflow; 2 Theory; 2.1 Conceptual Model; 2.2 Mathematical Model; 2.2.1 Porous Media; 2.2.2 Discrete Fractures; 2.2.3 Coupling Between Porous Media and Discrete Fractures; 2.2.4 Boundary Conditions; 2.3 Numerical Solution; 3 Open-Source Software; 3.1 OpenGeoSys (OGS); 3.1.1 Concept; 3.1.2 Input Files; 3.2 MeshIt; 3.2.1 Concept; 3.2.2 Workflow.
3.2.3 Supported File Formats4 Benchmarks; 4.1 2D Hot Dry Rock Benchmark; 4.1.1 Problem Definition; 4.1.2 OGS Input Files; 4.1.2.1 GLI: Geometry; 4.1.2.2 MSH: Finite Element Mesh; 4.1.2.3 PCS: Process Definition; 4.1.2.4 NUM: Numerical Properties; 4.1.2.5 TIM: Time Discretization; 4.1.2.6 IC: Initial Conditions; 4.1.2.7 BC: Boundary Conditions; 4.1.2.8 ST: Source/Sink Terms; 4.1.2.9 MFP: Fluid Properties; 4.1.2.10 MSP: Solid Properties; 4.1.2.11 MMP: Porous Medium Properties; 4.1.2.12 OUT: Output Parameters; 4.1.3 Run OGS; 4.1.4 Visualization; 4.1.5 Results.
4.2 2D Hot Sedimentary Aquifer Benchmark4.2.1 Problem Definition; 4.2.2 OGS Input Files; 4.2.2.1 GLI: Geometry; 4.2.2.2 MSH: Finite Element Mesh; 4.2.2.3 ST: Source/Sink Terms; 4.2.2.4 MSP: Solid Properties; 4.2.2.5 MMP: Porous Medium Properties; 4.2.3 Results; 5 Case Study: Gro€ Schönebeck; 5.1 Site Description; 5.2 Model Setup; 5.3 Mesh Generation; 5.3.1 Importing Geometry Data; 5.3.2 Surface Meshing; 5.3.3 Selecting Constrains of the Final Mesh; 5.3.4 Assigning 3D Materials; 5.3.5 Volume Meshing and Exporting; 5.4 Simulation of Initial Reservoir Conditions; 5.4.1 Input Files.
5.4.1.1 GLI: Geometry5.4.1.2 PCS: Process Definition; 5.4.1.3 NUM: Numerical Properties; 5.4.1.4 TIM: Time Discretization; 5.4.1.5 IC: Initial Conditions; 5.4.1.6 BC: Boundary Conditions; 5.4.1.7 ST: Source/Sink Terms; 5.4.1.8 MFP: Fluid Properties; 5.4.1.9 MSP: Solid Properties; 5.4.1.10 MMP: Porous Medium Properties; 5.4.1.11 OUT: Output Parameters; 5.4.2 Results; 5.5 Simulation of Heat Extraction Process; 5.5.1 PCS: Process Definition; 5.5.2 TIM: Time Discretization; 5.5.3 BC: Boundary Conditions; 5.5.4 ST: Source/Sink Terms; 5.5.5 Results; 6 Case Study: Soultz-sous-Forêts.
6.1 Site Description6.2 Model Setup; 6.3 Simulation of Initial Reservoir Conditions; 6.3.1 Input Files; 6.3.1.1 GLI: Geometry; 6.3.1.2 PCS: Process Definition; 6.3.1.3 NUM: Numerical Properties; 6.3.1.4 TIM: Time Discretization; 6.3.1.5 IC: Initial Conditions; 6.3.1.6 BC: Boundary Conditions; 6.3.1.7 MFP: Fluid Properties; 6.3.1.8 MSP: Solid Properties; 6.3.1.9 MMP: Porous Medium Properties; 6.3.1.10 OUT: Output Parameters; 6.3.2 Results; 6.4 Simulation of Heat Extraction Process; 6.4.1 Input Files; 6.4.1.1 PCS: Process Definition; 6.4.1.2 TIM: Time Discretization.
3.2.3 Supported File Formats4 Benchmarks; 4.1 2D Hot Dry Rock Benchmark; 4.1.1 Problem Definition; 4.1.2 OGS Input Files; 4.1.2.1 GLI: Geometry; 4.1.2.2 MSH: Finite Element Mesh; 4.1.2.3 PCS: Process Definition; 4.1.2.4 NUM: Numerical Properties; 4.1.2.5 TIM: Time Discretization; 4.1.2.6 IC: Initial Conditions; 4.1.2.7 BC: Boundary Conditions; 4.1.2.8 ST: Source/Sink Terms; 4.1.2.9 MFP: Fluid Properties; 4.1.2.10 MSP: Solid Properties; 4.1.2.11 MMP: Porous Medium Properties; 4.1.2.12 OUT: Output Parameters; 4.1.3 Run OGS; 4.1.4 Visualization; 4.1.5 Results.
4.2 2D Hot Sedimentary Aquifer Benchmark4.2.1 Problem Definition; 4.2.2 OGS Input Files; 4.2.2.1 GLI: Geometry; 4.2.2.2 MSH: Finite Element Mesh; 4.2.2.3 ST: Source/Sink Terms; 4.2.2.4 MSP: Solid Properties; 4.2.2.5 MMP: Porous Medium Properties; 4.2.3 Results; 5 Case Study: Gro€ Schönebeck; 5.1 Site Description; 5.2 Model Setup; 5.3 Mesh Generation; 5.3.1 Importing Geometry Data; 5.3.2 Surface Meshing; 5.3.3 Selecting Constrains of the Final Mesh; 5.3.4 Assigning 3D Materials; 5.3.5 Volume Meshing and Exporting; 5.4 Simulation of Initial Reservoir Conditions; 5.4.1 Input Files.
5.4.1.1 GLI: Geometry5.4.1.2 PCS: Process Definition; 5.4.1.3 NUM: Numerical Properties; 5.4.1.4 TIM: Time Discretization; 5.4.1.5 IC: Initial Conditions; 5.4.1.6 BC: Boundary Conditions; 5.4.1.7 ST: Source/Sink Terms; 5.4.1.8 MFP: Fluid Properties; 5.4.1.9 MSP: Solid Properties; 5.4.1.10 MMP: Porous Medium Properties; 5.4.1.11 OUT: Output Parameters; 5.4.2 Results; 5.5 Simulation of Heat Extraction Process; 5.5.1 PCS: Process Definition; 5.5.2 TIM: Time Discretization; 5.5.3 BC: Boundary Conditions; 5.5.4 ST: Source/Sink Terms; 5.5.5 Results; 6 Case Study: Soultz-sous-Forêts.
6.1 Site Description6.2 Model Setup; 6.3 Simulation of Initial Reservoir Conditions; 6.3.1 Input Files; 6.3.1.1 GLI: Geometry; 6.3.1.2 PCS: Process Definition; 6.3.1.3 NUM: Numerical Properties; 6.3.1.4 TIM: Time Discretization; 6.3.1.5 IC: Initial Conditions; 6.3.1.6 BC: Boundary Conditions; 6.3.1.7 MFP: Fluid Properties; 6.3.1.8 MSP: Solid Properties; 6.3.1.9 MMP: Porous Medium Properties; 6.3.1.10 OUT: Output Parameters; 6.3.2 Results; 6.4 Simulation of Heat Extraction Process; 6.4.1 Input Files; 6.4.1.1 PCS: Process Definition; 6.4.1.2 TIM: Time Discretization.