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Fig. 17 | Geothermal Energy

Fig. 17

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

Fig. 17

Example of a separation of pieces of rock in the near-wellbore area, for the stress state case D, with high heat transfer coefficient value—h = 10,000 W m−2 K−1, pressure in the wellbore = 50 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 (defined as area with more than 6 cracks cm−2)

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