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Geothermal Energy

Science – Society – Technology

Fig. 6 | Geothermal Energy

Fig. 6

From: Temperature and pressure corrections applied to rock thermal conductivity: impact on subsurface temperature prognosis and heat-flow determination in geothermal exploration

Fig. 6

Temperature profiles without correction of thermal conductivity (upper part) and temperature differences profiles (subfigures a1–c3) for scenario B (sedimentary section) at three different locations and for different basal heat flow in 30 km depth. Temperature differences are calculated against the uncorrected temperature profiles (relying on ambient thermal conductivities) based on different thermal conductivity (λ) correction methods: λ(maxp)—maximum of pressure (p) correction on λ only, λ(maxT)—maximum of temperature (T) correction on λ only (both as in Fig. 4); λ(p,T)—combined correction of λ by correcting firstly for p and secondly for T, λ(T,p)—combined correction of λ by correcting firstly for T and secondly for p; λ(p + T)—combined correction of λ by adding the single p/T correction effects (correction formulas for all ways as denoted in Table 2, rock-specific sedimentary scenario); λ(EM)—using the correction formula of Emirov et al. (2017) for p and T below 400 MPa and 573 K, respectively, otherwise as denoted in Table 2; λ—correction like λ(p,T), but ignoring the salt-specific correction formula for the rock salt layer (unit) and using sedimentsVS and rocksFF for T and p correction, respectively, instead

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