Numerical modeling for geological reservoir characterization
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1 Your opportunity to be part of the future! Pacengo del Garda, Verona, Italy October 19-20, 2015 Numerical modeling for geological reservoir characterization Colucci F, Moia F., Guandalini R., Agate G. Ricerca sul Sistema Energetico - RSE SpA (Milano)
2 Agenda - Numerical modeling of geological reservoirs: an essential tool - The methodology to carry out a good 3D model of a reservoir - GeoSIAM: Integrated System for GeoModeling Analyses - GeoSIAM applications: 1. geothermal field of Castel Giorgio Torre Alfina 2. CO 2 geological storage in an off-shore reservoir - Pesaro Mare - Conclusion 2
3 The numerical modeling of geological reservoirs The numerical simulation is essential for the evaluation of energy production involving geological reservoirs, such as geothermal field exploitation, CO 2 and natural gas storage and compressed air energy storage. The numerical simulation allows to verify the technical feasibility, safety and sustainability of the processes involved both in the short and long period. The Integrated System for GeoModeling Analyses GeoSIAM has been developed by RSE with the aim of supporting the user for all the modeling tasks 3
4 The methodology to carry out a 3D model 1. creation of an accurate static geological model 2. creation of a 3D mesh having a spatial discretization able to describe the geological structures (e.g. faults) and the injection/extraction structures (wells) 3. merging of the static geological model and the spatial mesh in order to attribute the thermo-physical properties of geological formations 4. assignment of proper boundary conditions and physical constraints Need of different software tools properly connected 4
5 GeoSIAM: Integrated System for GeoModeling Analyses - is an integrated modular software available for the most common platforms (Windows, Linux, Unix) - is based on portability, flexibility and ease-to-use criteria - use mainly OpenSource basic modules and auxiliary tools (as ParaView for post-processing analysis) - can import already available models from commercial tools (e.g. Petrel) or link proprietary software - the fluid dynamic module is based on a deep revision of Tough2 and a new module for a better 3D mesh generation - MethodsRdS - is available with free license 5
6 GeoSIAM: Integrated System for GeoModeling Analyses The automatic connecting structure 6
7 GeoSIAM applications Geothermal field 1. Castel Giorgio Torre Alfina 2. Monte Amiata * 3. Latera * 4. Lucignano *
8 GeoSIAM applications Geothermal field 1. Castel Giorgio Torre Alfina 2. Monte Amiata * 3. Latera * 4. Lucignano * CO 2 geological storage 1. Lombardy area (4 structure) Offshore Alto Adriatico 3. Pesaro Mare structure 4. Cornelia stucture 5. Offshore Marchigiano Offshore Calabria Ionica 7. Sulcis Area 8
9 GeoSIAM applications Geothermal field Hydrocarbon reservoir 1. Castel Giorgio Torre Alfina 1. Santa Maria Mare * 2. Monte Amiata * 3. Latera * 4. Lucignano * CO 2 geological storage 1. Lombardy area (4 structure) Offshore Alto Adriatico 3. Pesaro Mare structure Cornelia stucture 5. Offshore Marchigiano Offshore Calabria Ionica 7. Sulcis Area 9
10 GeoSIAM applications Geothermal field 1. Castel Giorgio Torre Alfina 2. Monte Amiata * 3. Latera * 4. Lucignano * CO 2 geological storage 1. Lombardy area (4 structure) 2. Offshore Alto Adriatico 3. Pesaro Mare structure 4. Cornelia stucture 5. Offshore Marchigiano 6. Offshore Calabria Ionica 7. Sulcis Area Hydrocarbon reservoir 1. Santa Maria Mare * Natural gas storage Lombardy reservoir (virtual) * In progress
11 GeoSIAM applications Geothermal field 1. Castel Giorgio Torre Alfina 2. Monte Amiata * 3. Latera * 4. Lucignano * CO 2 geological storage 1. Lombardy area (4 structure) 2. Offshore Alto Adriatico 3. Pesaro Mare structure 4. Cornelia stucture 5. Offshore Marchigiano 6. Offshore Calabria Ionica 7. Sulcis Area Hydrocarbon reservoir 1. Santa Maria Mare * Natural gas storage Lombardy reservoir (virtual) * In progress
12 GeoSIAM applications Sample 1: geothermal field of Castel Giorgio Torre Alfina - close to Bolsena Lake, between Lazio and Umbria regions - extension of more than 100 km 2 - Feasibility study for a 5 Mwe pilot plant project that is based on binary ORC technology, designed for about zero emission and total fluid re-injection in the same original reservoir Stratigraphic succession - Volcanic Complex - Neoautochthonous Complex: Miocene-Pliocene; clayey/sandy and conglomeratic - Liguride Complex: Cretaceous-Eocene; flysch and shales - Tuscan Complex: Cretaceous-Triassic; mainly carbonates. It is the geothermal reservoir. T= C - Metamorphic rocks: Trias-Paleozoico 12
13 Depth (m) Sample 1: Castel Giorgio Torre Alfina (geothermal field) Available data: - data from drilled wells Earth reference gradient Temperature ( C) 13
14 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Available data: - data from drilled wells - geological maps and sections 14
15 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Available data: - data from drilled wells - geological maps and sections - isobaths maps for top of geological formations Top of Tuscan Complex 15
16 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Available data: - data from drilled wells - geological maps and sections - isobaths maps for top of geological formations Top of Tuscan Complex The study has been carried out through three subsequent tasks: 1. creation of the static geological model and the 3D numerical model 2. simulation of the natural initial state of the geothermal field 3. simulation of different scenarios for production/re-injection of fluids The state module (EOS2) chosen can treat hot water, steam and high level of CO 2 16
17 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Static geological model Top Neoautochthonous complex 17
18 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Static geological model Top Neoautochthonous complex Top Ligurian complex 18
19 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Static geological model Top Neoautochthonous Ligurian Toscan complex complex 19
20 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Static geological model Volcanic complex Neoautochthonous complex Ligurian complex Tuscan complex Carbonates 600 Top complex TopNeoautochthonous Ligurian complex Toscan complex International CAE Conference October
21 Sample 1: Castel Giorgio Torre Alfina (geothermal field) 3D simulation model Elements: Nodes: Layers: 30 Geological formations Density Porosity Permeability Compressibility Conductivity Specific heat (-) (kg/m³) (%) (m²) (Pa -1 ) (W/m C) (J/kg C) Volcanic complex * * Neoautochthonous complex * * Liguride complex * * Scaglia Toscana * * Carbonates * *
22 Elements: Nodes: Layers: 30 Sample 1: Castel Giorgio Torre Alfina (geothermal field) The surface has been constrained to 15 C and 1 bar Temperature gradient trend Heating transient years Heat flux= 1.85*10 7 J/s 22
23 Elements: Nodes: Layers: 30 Sample 1: Castel Giorgio Torre Alfina (geothermal field) The surface has been constrained to 15 C and 1 bar Temperature Pressure gradient trend Heating transient years Heat flux= 1.85*10 7 J/s 23
24 Elements: Nodes: Layers: 30 Sample 1: Castel Giorgio Torre Alfina (geothermal field) The surface has been constrained to 15 C and 1 bar Temperature Pressure gradient trend Heating transient years Heat flux= 1.85*10 7 J/s 24
25 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Temperature gradient trend trend Pressure gradient Heating transient Elements: Nodes: Layers: 30 The surface has been constrained to 15 C and 1 bar Heat flux= 1.85*107 J/s years International CAE Conference October
26 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Temperature gradient trend trend Pressure gradient Heating transient Elements: Nodes: Layers: 30 The surface has been constrained to 15 C and 1 bar Heat flux= 1.85*107 J/s years International CAE Conference October
27 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Temperature gradient trend trend Pressure gradient Heating transient Elements: Nodes: Layers: 30 The surface has been constrained to 15 C and 1 bar Heat flux= 1.85*107 J/s years International CAE Conference October
28 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Elements: Nodes: Layers: 30 Temperature gradient trend trend Pressure gradient Heating transient The surface has been constrained to 15 C and 1 bar Heat flux= 1.85*107 J/s Time: years International CAE Conference October
29 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Elements: Nodes: Layers: 30 Temperature gradienttrend trend Pressure Pressuregradient gradient trend Heating transient The surface has been constrained to 15 C and 1 bar Heat flux= 1.85*107 J/s Time: years International CAE Conference October
30 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Comparison simulated and measured temperature Simulated value Measured value Simulated value Measured value 30
31 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Comparison simulated and measured temperature Simulated value Measured value Simulated value Measured value Simulated value Measured value 31
32 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Simulation of production/re-injection scenarios 5 production wells and 4 re-injection wells have been modeled Production wells Re-injection wells Scenarios Productioned time (y) Simulated time (y) Total flow (ton/h) Active length (m) Scenario # Scenario # Scenario #
33 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Scenario #2 Simulation of production/re-injection scenarios Production wells Re-injection wells Time: 0.0 Production wells Re-injection wells Time:
34 Sample 1: Castel Giorgio Torre Alfina (geothermal field) Scenario #2 Simulation of production/re-injection scenarios Production wells Re-injection wells Production wells: Depressurization of 7 bar (~3.3% of initial value) Re-injection wells: Overpressure of 5.5 bar (~2% of initial value) Time: 50.0 Production wells Re-injection wells Production wells: Temperature increase < 1 C Re-injection wells: Temperature decrease because the re-injection temperature is 80 C Time: Time:
35 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir - Pesaro Mare is located in the north-central area of the Adriatic Sea between Ancona, Pesaro and Urbino provinces 35
36 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir - Pesaro Mare is located in the north-central area of the Adriatic Sea between Ancona, Pesaro and Urbino provinces Isobaths top reservoir - The structure is an anticline with the eastern flank faulted - The sedimentary sequence consists of the Umbro- Marchigiana series. The potential reservoir has been identified in carbonate formations known as Calcare Massiccio (Jurassic) Pesaro Mare
37 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Formations 37
38 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Formations 38
39 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Formations Calcare massiccio 39
40 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Formations Marne a Fucoidi Calcare massiccio 40
41 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Formations Gruppo di Gallare Marne a Fucoidi Calcare massiccio 41
42 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Formations Gruppo di Gallare Marne a Fucoidi Calcare massiccio 42
43 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Formations Gruppo di Gallare Marne a Fucoidi Calcare massiccio Geological formations Density Porosity Permeability Compressibility (-) (kg/m³) (%) (m²) (Pa -1 ) Quaternary deposits E E-10 Clay deposits E E-11 Gruppo di Gallare E E-12 Scaglia Calcarea E E-12 Marne a fucoidi E E-12 Calcare dolomitizzato E E-12 43
44 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Scenarios Number of well Flow rate (Mton/y) Active length (m) Scenario # Scenario # Injection time: 30 years - Simulated time: 100 years Scenario # each well
45 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Scenarios Number of well Flow rate (Mton/y) Active length (m) Scenario # Scenario # Injection time: 30 years - Simulated time: 100 years Scenario # each well
46 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Scenarios Number of well Flow rate (Mton/y) Active length (m) Scenario # Scenario # Injection time: 30 years - Simulated time: 100 years Scenario # each well
47 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Scenarios Number of well Flow rate (Mton/y) Active length (m) Scenario # Scenario # Injection time: 30 years - Simulated time: 100 years Scenario # each well After 30 years the two plumes don t intersect 47
48 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Scenarios Number of well Flow rate (Mton/y) Active length (m) Scenario # Scenario # Injection time: 30 years - Simulated time: 100 years Scenario # each well After 30 years the two plumes don t intersect - After 50 years the two plumes don t intersect but are very close 48
49 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Scenarios Number of well Flow rate (Mton/y) Active length (m) Scenario # Scenario # Injection time: 30 years - Simulated time: 100 years Scenario # each well After 30 years the two plumes don t intersect - After 50 years the two plumes don t intersect but are very close 49
50 GeoSIAM applications Sample 2: CO 2 storage in an off-shore reservoir (Pesaro Mare) Scenarios Number of well Flow rate (Mton/y) Active length (m) Scenario # Scenario # Injection time: 30 years - Simulated time: 100 years Scenario # each well After 30 years the two plumes don t intersect - After 50 years the two plumes don t intersect but are very close At 30 years ΔP MAX = 3.4 bar increase from initial pressure equal 1.5% within security limit fixed to 10% 50
51 Conclusion - GeoSIAM is a powerful tool to support numerical simulations in all the energy production aspects involving geologic reservoirs - Accurate 3D numerical model has been realized for two areas: 1. Castel Giorgio Torre Alfina in order to verify the sustainability for geothermal electric production by a 5 MWe nominal power pilot plant. The over pressure field around the re-injection wells is limited to 2% of pre-existing one therefore the production sustainability is guaranteed for all the period. 2. Pesaro Mare in order to verify the feasibility for CO 2 geological storage. The safety is guaranteed by the low over pressure generated around the injection wells that is limited to 1.5% of pre-existing one. The methodology implemented by GeoSIAM allows to perform geological reservoir characterizations with an high level of accuracy, saving time and reducing errors. 51
52 Thanks for your attention Francesca Colucci Acknowledgments This work has been financed by the Research Fund for the Italian Electrical System under the Contract Agreement between RSE S.p.A. and the Ministry of Economic Development - General Directorate for Nuclear Energy, Renewable Energy and Energy Efficiency, stipulated on July 29, 2009, in compliance with the Decree of November 11,
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