Predictability and controlling factors of overpressure in the North Alpine Foreland Basin, SE Germany: an interdisciplinary post-drill analysis of the Geretsried GEN-1 deep geothermal well

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Details zur Publikation

Autorinnen und Autoren: Drews M, Hofstetter P, Zosseder K, Straubinger R, Gahr A, Stollhofen H
Zeitschrift: Geothermal Energy
Jahr der Veröffentlichung: 2019
Band: 7
Heftnummer: 3
Seitenbereich: 24
ISSN: 2195-9706


Abstract

For the first time, drilling- and velocity-based well analysis and 3D basin modeling were combined to test the predictability and controlling factors of overpressure in the North Alpine Foreland Basin in SE Germany. More specifically, the techniques were tested in the sub-regional context of the deep geothermal well Geretsried GEN-1 (TVD = 4852 m), located in the south of Munich. A 3D basin model based on a total of 20 wells was calibrated to the pressure distribution of four petroleum wells and tested against the Geretsried GEN-1 well. The results demonstrate that overpressure in the North Alpine Foreland Basin SE Germany can be predicted from a simple 3D basin model calibrated to a minimum number of wells. Thereby, disequilibrium compaction likely acts as the main overpressure mechanism in the study area, underpinned by significantly higher sedimentation rates at overpressured locations. 3D basin modeling also confirms the role of Upper Cretaceous shales, which, if present, serve as an important pressure barrier between the under- to normally pressured Jurassic and overpressured Cenozoic basin fill. In addition, overpressure magnitudes of the Chattian might be higher than previously expected. The results of this study have great impact on future drilling campaigns in the North Alpine Foreland Basin in SE Germany. Minimized non-productive time and drilling cost, improved well planning and increased safety are amongst the most important benefits of accurate pore pressure and overpressure prediction. The newly derived insights on the mechanisms of overpressure will greatly influence future geomechanical and tectonic studies, since pore pressure drives rock strength and principle stress magnitudes. Finally, the study is a great example for the importance of an interdisciplinary approach and the incorporation of geological conditions, when investigating drilling-related problems.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Drews, Michael Dr.
Lehrstuhl für Geologie (Exogene Dynamik)
Stollhofen, Harald Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)


Einrichtungen weiterer Autorinnen und Autoren

Technische Universität München (TUM)


Forschungsbereiche

Tiefe Geothermie
Lehrstuhl für Geologie (Exogene Dynamik)
Beckenanalyse
Lehrstuhl für Geologie (Exogene Dynamik)
Klima und Ressourcen
Forschungsschwerpunkt einer Fakultät: Naturwissenschaftliche Fakultät


Zitierweisen

APA:
Drews, M., Hofstetter, P., Zosseder, K., Straubinger, R., Gahr, A., & Stollhofen, H. (2019). Predictability and controlling factors of overpressure in the North Alpine Foreland Basin, SE Germany: an interdisciplinary post-drill analysis of the Geretsried GEN-1 deep geothermal well. Geothermal Energy, 7(3), 24. https://dx.doi.org/10.1186/s40517-019-0121-z

MLA:
Drews, Michael, et al. "Predictability and controlling factors of overpressure in the North Alpine Foreland Basin, SE Germany: an interdisciplinary post-drill analysis of the Geretsried GEN-1 deep geothermal well." Geothermal Energy 7.3 (2019): 24.

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Zuletzt aktualisiert 2019-26-04 um 08:49

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