Skip to main content

Science – Society – Technology

Geothermal Energy Cover Image

Table 1 Typical rock properties according to: (1) Magnenet et al. (2014); (2) Kohl (2000); (3) GeORG); (4) Bar (2012); (5) Rummel (1992); (6) Haenel (1983); (7) Freymark et al. (2017); (8) Kirk and Williamson (2012); (9) Sausse (2002); (10) Heap et al. (2017); (11) Griffiths et al. (2016); (12) Hettkamp et al. (1999)

From: THM modeling of hydrothermal circulation at Rittershoffen geothermal site, France

Property (unit) Upper sediments Lower sediments Upper granites Lower granites
Porosity, \(\phi _o\) (\(\%\)) 3.0\(^{[1]}\)–35.0\(^{[1]}\) 2.9\(^{[10]}\)–20.7\(^{[11]}\) 0.13\(^{[3]}\)–25.55\(^{[3]}\) 0.13\(^{[3]}\)–0.8\(^{[1]}\)
Total specific mass, \(r_0\) (kg m\(^{-3}\)) 2300\(^{[1]}\)–2600\(^{[1]}\) 2180\(^{[4]}\)–2660\(^{[7]}\) 2500\(^{[1]}\)–2800\(^{[1]}\) 2650\(^{[6]}\)–2800\(^{[6]}\)
Young’s modulus, E (GPa) 10.0\(^{[1]}\)–90.0\(^{[1]}\) 8.0\(^{[1]}\)–39.0\(^{[5]}\) 25.0\(^{[9]}\)–80.0\(^{[5]}\) 25.0\(^{[9]}\)–80.0\(^{[5]}\)
Poisson’s ratio, \(\nu\) (–) 0.1\(^{[9]}\)–0.33\(^{[1]}\) 0.06\(^{[1]}\)–0.46\(^{[1]}\) 0.1\(^{[9]}\)–0.38\(^{[5]}\) 0.1\(^{[9]}\)–0.38\(^{[5]}\)
Biot coefficient, b (–) 0.65\(^{[1]}\)–0.8\(^{[1]}\) 0.8\(^{[1]}\)–1.0\(^{[1]}\) 0.27\(^{[1]}\)–0.45\(^{[1]}\) 0.27\(^{[1]}\)–0.45\(^{[1]}\)
Specific heat, \(c_s\) (J kg\(^{-1}\) K\(^{-1}\)) 800\(^{[1]}\) 800\(^{[1]}\) 800\(^{[1]}\) 800\(^{[1]}\)
Thermal conductivity, \(\lambda _{d}\) (W m\(^{-1}\) K\(^{-1}\)) 1.1\(^{[3]}\)–5.9\(^{[3]}\) 1.2\(^{[3]}\)–4.2\(^{[3]}\) 2.3\(^{[3]}\)–4.3\(^{[3]}\) 2.3\(^{[3]}\)–4.3\(^{[3]}\)
Thermal dilation, \(\alpha _0\) (10\(^{-5}\) K\(^{-1}\)) 1.3\(^{[8]}\)–1.5\(^{[8]}\) 1.3\(^{[8]}\)–1.5\(^{[8]}\) 1.4\(^{,[1]}\) 1.4\(^{[1]}\)
Heat source production, \(\theta _{\text{rad}}\) (\(\upmu\)W m\(^{-3}\)) 0.1\(^{[2]}\)–1.0\(^{[3]}\) 0.5\(^{[1]}\)–1.0\(^{[3]}\) 1.0\(^{[6]}\)–6.2\(^{[5]}\) 1.0\(^{[6]}\)–6.2\(^{[5]}\)
Permeability, \(K_{\text{int}}\) (m\(^2\)) \(1.0\times 10^{-18^{[4]}}\)\(3.2\times 10^{-14^{[4]}}\) \(1.0\times 10^{-18^{[11]}}\)\(1.0\times 10^{-13^{[10]}}\) \(1.0\times 10^{-20^{[12]}}\)\(3.0\times 10^{-14^{[12]}}\) \(1.0\times 10^{-20^{[12]}}\)\(1.8\times 10^{-15^{[3]}}\)