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Fig. 18 | Geothermal Energy

Fig. 18

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

Fig. 18

Influence of the well pressure on fracture propagation (after both hydraulic pressure and thermal loading), for case stress state C, with h = 1000 W m−2 K−1. The four snapshots correspond to hydraulic pressure Pw of 94, 70, 34, 0 MPa. In this figure, black color corresponds to the wellbore and to separated pieces of rock matrix, cyan color corresponds to unseparated but severely damaged areas (more than 6 cracks cm−2). Note that the fracture propagation is limited by the DEM model size, as a consequence, the radial distance of the tip cannot exceed 41.5 cm

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