Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Hydro-Thermal Modeling for Geothermal Energy Extraction from Soultz-Sous-forêts, France

Version 1 : Received: 10 October 2021 / Approved: 11 October 2021 / Online: 11 October 2021 (15:22:10 CEST)

A peer-reviewed article of this Preprint also exists.

Mahmoodpour, S.; Singh, M.; Turan, A.; Bär, K.; Sass, I. Hydro-Thermal Modeling for Geothermal Energy Extraction from Soultz-sous-Forêts, France. Geosciences 2021, 11, 464. Mahmoodpour, S.; Singh, M.; Turan, A.; Bär, K.; Sass, I. Hydro-Thermal Modeling for Geothermal Energy Extraction from Soultz-sous-Forêts, France. Geosciences 2021, 11, 464.

Journal reference: Geosciences 2021, 11, 464
DOI: 10.3390/geosciences11110464

Abstract

The deep geothermal industrial project at Soultz-sous-Forêts is located in the Upper Rhine Graben, France. As part of the MEET project, this study aims to evaluate the possibility of extracting higher amounts of energy from the existing industrial infrastructure. To achieve this objective, the effect of reinjecting fluid at lower temperature than the current fluid injection temperature of 70 ℃ was modelled and the drop in the production wellhead temperature for 100 years of operation was quantified. Two injection-production rate scenarios were considered and compared for their effect on overall production wellhead temperature. For each scenario, reinjection temperatures of 40 ℃, 50 ℃ and 60 ℃ were chosen and compared with the 70 ℃ injection case. For the lower production rate scenario, the results show that the production wellhead temperature is approximately 1-1.5 ℃ higher than for the higher production rate scenario after 100 years of operation. In conclusion, no significant thermal breakthrough has been observed with the applied flow rates and lowered injection temperatures even after 100 years of operation.

Keywords

Soultz-sous-Forêts; EGS; Hydro-thermal modeling; Wellbore coupling

Subject

ENGINEERING, Energy & Fuel Technology

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