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Implications on large-scale flow of the fractured EGS reservoir Soultz inferred from hydraulic data and tracer experiments

Egert, Robert; Gholami Korzani, Maziar; Held, Sebastian; Kohl, Thomas

Abstract (englisch):
The Enhanced Geothermal System in Soultz-sous-Forêts, located in the geothermal favorable Upper Rhine
Graben, is a fracture-controlled reservoir that was highly investigated in the last decades generating a huge
geoscientific database. Numerical reservoir models use this database to simulate the operation of the subsurface
heat exchanger, yet suffer from simplifications regarding the transfer of experimental into model data, dimensional
extension, and computational power and efficiency. The new extensive transient 3D simulations, based on
geophysical, geological and hydraulic data, highlight the hydraulic and transport feedback of the Soultz EGS due
to convective and advective fluid flow. Developed with the goal of simulating the vast tracer test data during the
reservoir-testing phase in 2005, the finite element model is focusing on the main fractured zones, which connect
the wells in the deep reservoir. It comprises 13 major hydraulically active faults and fractures in a
13×11 x 5 km extending model domain, as well as open-hole sections of the wells GPK1 to GPK4 and their
casing leakages. The simulation of the tracer experiment confirms the strong heterogeneity of the reservoir and
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DOI: 10.1016/j.geothermics.2019.101749
Zitationen: 3
Web of Science
Zitationen: 4
Zitationen: 5
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 03.2020
Sprache Englisch
Identifikator ISSN: 0375-6505
KITopen-ID: 1000100123
HGF-Programm 35.14.01 (POF III, LK 01) Effiziente Nutzung geothermisch. Energie
Erschienen in Geothermics
Verlag Elsevier
Band 84
Seiten 101749
Vorab online veröffentlicht am 19.11.2019
Nachgewiesen in Web of Science
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