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Geothermal Energy

Science – Society – Technology

Fig. 12 | Geothermal Energy

Fig. 12

From: Microstructural and petrophysical properties of the Permo-Triassic sandstones (Buntsandstein) from the Soultz-sous-Forêts geothermal site (France)

Fig. 12

Permeability as a function of connected porosity for the sandstones sampled from exploration well EPS-1 at Soultz-sous-Forêts (Alsace, France) and the three quarry rocks. perp sample cored perpendicular to bedding, para sample cored parallel to bedding. Dashed grey line is an empirical (exponential) fit to the data; the equation is given next to the curve. n refers to the number of samples

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