Reference : Comparison of temperature estimates from heat transport model and electrical resistiv...
Scientific congresses and symposiums : Paper published in a journal
Engineering, computing & technology : Geological, petroleum & mining engineering
http://hdl.handle.net/2268/104394
Comparison of temperature estimates from heat transport model and electrical resistivity tomography during a shallow heat injection and storage experiment
English
[fr] Comparaison d'estimations de températures de modèles de transports et de tomographies de résistivité électrique durant un test d'injection et de stockage de chaleur à faible profondeur
Hermans, Thomas mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
Daoudi, Moubarak [Université de Liège - ULg > > > 2e an. master ingé. civ. mines & géol., fin. appr.]
Vandenbohede, Alexander mailto [Universiteit Gent - Ugent > Geology and Soil Science > Groundwater Modelling > >]
Robert, Tanguy [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
Caterina, David mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
Nguyen, Frédéric mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
Sep-2012
Berichte der Geologischen Bundesanstalt
93
International Workshop on Geoelectric Monitoring - Geoelectric Monitoring - Current Research and Perspectives for the Future
43-48
No
No
International
1017-8880
Vienna
Austria
1st International Workshop on Geoelectrical Monitoring - GELMON 2011
from 30-11-2011 to 02-12-2011
Geological Survey of Austria
Vienna
Austria
[en] Electrical resistivity tomography ; time-lapse monitoring ; thermal properties ; hydrogeological modeling ; thermal test
[en] Groundwater resources are increasingly used around the world as geothermal systems. Understanding physical processes and quantification of parameters determining heat transport in porous media is therefore important. Geophysical methods may be useful in order to yield additional information with greater coverage than conventional wells. We report a heat transport study during a shallow heat injection and storage field test. Heated water (about 50°C) was injected for 6 days at the rate of 80 l/h in a 10.5°C aquifer. Since bulk electric resistivity variations can bring important information on temperature changes in aquifers (water electric conductivity increases about 2%/°C around 25°C), we monitored the test with surface electric resistivity tomography and demonstrate its ability to monitor spatially temperature variations. Time-lapse electric images clearly show the decrease and then the increase in bulk electric resistivity of the plume of heated water, during respectively the injection and the storage phase. This information enabled to calibrate the conceptual flow and heat model used to simulate the test. Inverted resistivity values are validated with borehole electromagnetic measurements (EM39) and are in agreement with the temperature logs used to calibrate the parameters of the thermo-hydrogeological model for the injection phase. This field work demonstrates that surface electric resistivity tomography can monitor heat and storage experiments in shallow aquifers. These results could potentially lead to a number of practical applications, such as the monitoring or the design of shallow geothermal systems or the use of heated water to replace salt water in tracer tests.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/104394
http://www.geologie.ac.at/pdf/Berichte_93

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