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Geothermal Energy

Science – Society – Technology

Fig. 5 | Geothermal Energy

Fig. 5

From: RETRACTED ARTICLE: Predictability and controlling factors of overpressure in the North Alpine Foreland Basin, SE Germany: an interdisciplinary post-drill analysis of the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

Fig. 5

Shale-permeability models used in this study in comparison to the two-phase model by Busch and Amann-Hildenbrand (2013). Depth and temperature are connected assuming a geothermal gradient of 30 °C/km and a surface temperature of 10 °C. The dotted, and dashed black lines represent the porosity–permeability relationships from Yang and Aplin (2010) for 40%, 70% and 90% clay content, respectively. Porosity has been modeled using the porosity function of Drews et al. (2018) also used in this study. The temperature-dependent permeability model developed in this study is represented by the solid red line. The two-phase permeability model (solid black line) is derived from application of the model of Busch and Amann-Hildenbrand (2013) to the porosity–permeability relationship of Yang and Aplin (2010) for 70% clay content

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