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Seismicity induced during the development of the Rittershoffen geothermal field, France

Maurer, V.; Gaucher, E.; Grunberg, M.; Koepke, R.; Pestourie, R.; Cuenot, N.

Abstract:
The development of the Rittershoffen deep geothermal field (Alsace, Upper Rhine Graben) between 2012 and 2014 induced unfelt seismicity with a local magnitude of less than 1.6. This seismicity occurred during two types of operations: (1) mud losses in the Muschelkalk formation during the drilling of both wells of the doublet and (2) thermal and hydraulic stimulations of the GRT-1 well. Seismicity was also observed 4 days after the main hydraulic stimulation, although no specific operation was performed. During chemical stimulation, however, no induced seismicity was detected. In the context of all field development operations and their injection parameters (flow rates, overpressures, volumes), we detail the occurrence or lack of seismicity, its magnitude distribution and its spatial distribution. The observations suggest the presence of the rock stress memory effect (Kaiser effect) of the geothermal reservoir as well as uncritically stressed zones connected to the GRT-1 well and/or rock cohesion. A reduction of the seismic rate concurrent with an increase of injectivity was noticed as well as the reactivation of a couple of faults, including the Rittershoffen fault, which was targeted by the wells. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000105851
Veröffentlicht am 24.02.2020
Originalveröffentlichung
DOI: 10.1186/s40517-020-0155-2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2195-9706
KITopen-ID: 1000105851
Erschienen in Geothermal Energy
Band 8
Heft 1
Seiten Article: 5
Nachgewiesen in Scopus
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