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Geothermal Energy Cover Image
Fig. 6 | Geothermal Energy

Fig. 6

From: Borehole damaging under thermo-mechanical loading in the RN-15/IDDP-2 deep well: towards validation of numerical modeling using logging images

Fig. 6

Examples of the temperature gradient in a rock for different heat transfer coefficient (h, from 20 W m−2 K−1 to 20,000 W m−2 K−1) inducing different heat flux, and evolution with the time. In this example (corresponding to a different numerical setting), the rock temperature is 200 °C and the wellbore fluid temperature is 40 °C. As a matter of comparison, the green curves (T fixed) present the thermal gradients obtained by setting directly the temperature of the particles of the wellbore at the target temperature (used in the analytical model, see Appendix)

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