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Modeling the effects of regional groundwater flow on deep temperatures in the northern Upper Rhine Graben (Germany)

Koltzer, N. and Schäffer, R. and Scheck-Wenderoth, M. and Bott, J. and Cacace, M. and Bär, K. and Sass, I. (2019):
Modeling the effects of regional groundwater flow on deep temperatures in the northern Upper Rhine Graben (Germany).
In: Book of Abstracts, In: 5th International Young Earth Scientists (YES) Congress, Berlin, 09.-13.09.2019, [Online-Edition: https://yesdeutschland.weebly.com/abstract-booklet.html],
[Conference or Workshop Item]

Abstract

A successful utilization of deep geothermal resources requires accurate predictions about the reservoir temperature distribution as well as an in depth knowledge of the hydraulic processes. The latter exert a direct influence on the subsurface temperature and therefore on the potential productivity of geothermal reservoirs. The aim of this study is to investigate and quantify the influence that regional thermo-hydraulic processes exert on the geothermal configuration of potential reservoirs in the northern Upper Rhine Graben and adjacent areas. Specifically, we address the questions of (i) how the regional thermal and hydraulic configurations influence local reservoir conditions, and (ii) whether it is possible to improve subsurface predictions iteratively by relying on 3D numerical modeling techniques. Therefore, a highly detailed 3D structural model of the northern part of the Upper Rhine Graben and the adjacent areas was built. The model was then used for coupled 3D thermo-hydraulic simulations of the deep fluid flow and heat transport. By running different simulations, we systematically tested hypotheses for the regional fluid dynamics based on hydro-geochemical analysis results. Springs, mineral and thermal, have been used for the validation process of the flow field and available temperature measurements for the validation of the thermal field. With this knowledge of the thermo-hydraulic mechanisms of heat transport, the next step will be to downscale this process understanding and implement it in predictions of geothermal potentials on a local scale for the urban area of Frankfurt am Main.

Item Type: Conference or Workshop Item
Erschienen: 2019
Creators: Koltzer, N. and Schäffer, R. and Scheck-Wenderoth, M. and Bott, J. and Cacace, M. and Bär, K. and Sass, I.
Title: Modeling the effects of regional groundwater flow on deep temperatures in the northern Upper Rhine Graben (Germany)
Language: English
Abstract:

A successful utilization of deep geothermal resources requires accurate predictions about the reservoir temperature distribution as well as an in depth knowledge of the hydraulic processes. The latter exert a direct influence on the subsurface temperature and therefore on the potential productivity of geothermal reservoirs. The aim of this study is to investigate and quantify the influence that regional thermo-hydraulic processes exert on the geothermal configuration of potential reservoirs in the northern Upper Rhine Graben and adjacent areas. Specifically, we address the questions of (i) how the regional thermal and hydraulic configurations influence local reservoir conditions, and (ii) whether it is possible to improve subsurface predictions iteratively by relying on 3D numerical modeling techniques. Therefore, a highly detailed 3D structural model of the northern part of the Upper Rhine Graben and the adjacent areas was built. The model was then used for coupled 3D thermo-hydraulic simulations of the deep fluid flow and heat transport. By running different simulations, we systematically tested hypotheses for the regional fluid dynamics based on hydro-geochemical analysis results. Springs, mineral and thermal, have been used for the validation process of the flow field and available temperature measurements for the validation of the thermal field. With this knowledge of the thermo-hydraulic mechanisms of heat transport, the next step will be to downscale this process understanding and implement it in predictions of geothermal potentials on a local scale for the urban area of Frankfurt am Main.

Title of Book: Book of Abstracts
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Geothermal Science and Technology
Event Title: 5th International Young Earth Scientists (YES) Congress
Event Location: Berlin
Event Dates: 09.-13.09.2019
Date Deposited: 16 Sep 2019 05:38
Official URL: https://yesdeutschland.weebly.com/abstract-booklet.html
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