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  Thermo-hydro-mechanical modeling of an enhanced geothermal system in a fractured reservoir using carbon dioxide as heat transmission fluid - A sensitivity investigation

Mahmoodpour, S., Singh, M., Bär, K., Sass, I. (2022): Thermo-hydro-mechanical modeling of an enhanced geothermal system in a fractured reservoir using carbon dioxide as heat transmission fluid - A sensitivity investigation. - Energy, 254, Part B, 124266.
https://doi.org/10.1016/j.energy.2022.124266

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Mahmoodpour, Saeed1, Autor
Singh, Mrityunjay2, Autor              
Bär, Kristian1, Autor
Sass, Ingo2, Autor              
Affiliations:
1External Organizations, ou_persistent22              
20 Pre-GFZ, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146023              

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Schlagwörter: Sensitivity analysis CO2-EGS Discrete fracture networks THM modeling
 Zusammenfassung: Geothermal energy has the potential to support direct heat usage and electricity generation at a low carbon footprint. Using carbon dioxide (CO2) as a heat transfer fluid can allow us to achieve a negative carbon energy solution. This study assess the geothermal energy extraction potential from a discretely fractured reservoir using CO2. The geothermal energy extraction process is a coupled thermo-hydro-mechanical (THM) mechanism, and the geomechanical stresses involve thermoelasticity and poroelasticity. This study demonstrates a fully coupled THM mechanism for enhanced geothermal system (EGS) operations. A large number of parameters are involved in the THM mechanism, and therefore, it becomes difficult to assess the key operating parameters to have better-operating efficiency. We identified 22 input parameters that control the THM mechanism. Therefore, a sensitivity analysis is performed to investigate the relative importance of these parameters that concentrates on three key objective parameters: thermal breakthrough time, mass flux and overall energy recovery. The important parameters controlling these three objective parameters are matrix permeability and fracture aperture whereas wellbore radius has an impact on mass flux and total energy recovery. All the parameters are ranked in order of their importance during an EGS operation.

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Sprache(n): eng - Englisch
 Datum: 2022-05-252022
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1016/j.energy.2022.124266
 Art des Abschluß: -

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Titel: Energy
Genre der Quelle: Zeitschrift, SCI, Scopus
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 254 (Part B) Artikelnummer: 124266 Start- / Endseite: - Identifikator: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals113
Publisher: Elsevier