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Table 2 Average connected porosity, average grain diameter, specific surface area, average dry P-wave velocity, and average gas permeability for each of the six sandstones sampled from exploration well EPS-1 at the Soultz-sous-Forêts geothermal site (France)

From: The influence of hydrothermal brine on the short-term strength and elastic modulus of sandstones from exploration well EPS-1 at Soultz-sous-Forêts (France)

Box number Depth (m) Unit Average connected porosity Average grain diameter (μm) Specific surface area (m2/kg) Average dry P-wave velocity (km/s) Average gas permeability (m2)
84 1008 Voltzia 0.096 142 1442 3.7 2.82 × 10−18
100 1022 Intermédiaires 0.065 306 665 3.6 6.45 × 10−18
157 1069 Karlstal 0.117 424 204 3.4 1.33 × 10−16
198 1107 Karlstal 0.097 192 1485 3.2 7.95 × 10−17
402 1290 Trifels 0.131 259 1349 3.1 2.37 × 10−16
540 1414 Anté-Annweiler 0.075 379 6170 2.9 7.89 × 10−18
  1. Physical property data taken from Heap et al. (2017). Elastic wave velocities and porosities were measured at room pressure and permeabilities were measured under a confining pressure of 1 MPa (see Heap et al. (2017) for details)