Hydrothermal characterization of wells GRT-1 and GRT-2 in Rittershoffen, France: Implications on the understanding of natural flow systems in the rhine graben
| Autor: | Jean Schmittbuhl, Clément Baujard, Jeanne Vidal, Albert Genter, Vincent Maurer, R. Rosillette, E. Dalmais, Régis Hehn |
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| Přispěvatelé: | Institut National de l'Environnement Industriel et des Risques (INERIS), GEIE Exploitation Minière de la Chaleur, GEIE, Institut de physique du globe de Strasbourg (IPGS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Ecole et Observatoire des Sciences de la Terre (EOST) |
| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
Paleozoic Rittershoffen Natural flow Renewable Energy Sustainability and the Environment Geology [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] EGS Hydro-thermal characterisation 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Hydrothermal circulation Characterization (materials science) ECOGI Graben Upper rhine graben Basement Stimulation Petrology Geomorphology Geothermal gradient ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences |
| Zdroj: | Geothermics Geothermics, Elsevier, 2017, 65, pp.255-268. ⟨10.1016/j.geothermics.2016.11.001⟩ |
| ISSN: | 0375-6505 |
| DOI: | 10.1016/j.geothermics.2016.11.001 |
| Popis: | An extended description of the implementation of the deep geothermal wells GRT-1 and GRT-2 respectively drilled in 2012 and 2014 in the framework of the ECOGI project is given. These wells located in Rittershoffen (France) offer a unique opportunity to gather high quality datasets on a deep geothermal system in the Upper Rhine Graben at the transition between the Buntsandstein sandstone and the Palaeozoic granite basement. We present the extensive logging and well testing program that was applied and focus on hydraulic and thermal characterization of the targeted deep reservoir. Well architectures of GRT-1 and GRT-2 are described. Temperature logs in both wells are discussed in details. In particular, temperature in the production well GRT-2 is shown to reach 177 °C at 3196 m MD at thermal equilibrium. Production tests of both wells, reservoir development strategy applied in well GRT-1 and circulation test realised between wells are analysed. Productivity and injectivity indexes of GRT-1 and GRT-2 are estimated: Post-stimulation injectivity of GRT-1 and productivity of GRT-2 are respectively estimated to 2.5 l/s/bar and 3.5 l/s/bar. Hydraulic properties of the reservoir are inferred from production tests. Implications for the characterization of the large scale natural hydro-thermal system are discussed. |
| Databáze: | OpenAIRE |
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