Journal
GEOTHERMICS
Volume 95, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.geothermics.2021.102119
Keywords
Numerical simulation; Geothermal energy; Pressure transient analysis; Parametric study; Fault zone; Malm; Molasse basin; Productivity index; Reduced basis method
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Funding
- Bavarian Ministry of Science and Art
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This study quantified the effect of hydraulically active fault zones on the well-productivity-index using numerical modeling and the Reduced Basis method in the Upper Jurassic aquifer. The results suggest that hidden fault zones can significantly increase the productivity index, while the likelihood of a hydraulically active fault zone thickness greater than or equal to 100 meters is low.
Fault zones (FZ) are major components of geothermal exploration concepts for the Southern German Upper Jurassic aquifer (UJA). Because these sections of possibly favorable hydraulic properties can be hidden in pumping test data, their explorational importance with respect to well productivity is still debated. In this work, the effect of hydraulically active FZ on the well-productivity-index (PI) is quantified in dependency of the UJA parameter space using numerical modeling and the Reduced Basis method. Results suggest that hidden FZ can increase PI significantly, while a hydraulically active FZ thickness of >= 100 m is unlikely for the Upper Jurassic aquifer.
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