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Table 1 Petro- and thermophysical rock properties of the Ripon Formation (southern Karoo Basin, South Africa)

From: Geothermal energy from the Main Karoo Basin? New insights from borehole KWV-1 (Eastern Cape, South Africa)

Sample location Number of measurements Density (kg/m3) Porosity (%) Permeability Thermal conductivity [W/(m K)] Thermal diffusivity (1.0 E−06 m2/s)
(mD) (m2)
Ecca pass (outcrop) 76 2630–2730 (mean 2670) 0–3.70 (mean 1.0) 0.0100–0.1000 (mean 0.0500) 7.21·10−18–9.94·10−17(mean 4.83·10−17) 2.38–3.20 (mean 2.82) 0.71–1.83 (mean 1.21)
KWV-1 (borehole) 32 2570–2770 (mean 2700) 0.40–2.20 (mean 1.3) 0.0010–0.0020 (mean 0.0014) 9.87·10−19–1.97·10−18(mean 1.38·10−18) 3.17–3.71 (mean 3.37) 1.30–1.53 (mean 1.39)