102 Geophysics in Geothermal Exploration Figure 2.35 DNN results: (a) seismic section with well synthetic; (d) 1D QC at well location showing from left to right AI log (grey), well synthetic (black), seismic (red); (e) 1D QC at well location showing VCL log (green), PHIT log (orange) and corresponding inferred PHIT and VCL (red); (b) PHIT section and log; (c) VCL section and log (after Souvannavong et al., 2024). By adopting the thermoacoustic wave equation, Yang et al. (2024) have proposed a full-waveform inversion method to directly invert temperature and velocity parameters using seismic data. The method has been checked on synthetic data sets. Figure 2.36 shows the exact or real velocity and temperature models, composed of 301 traces over 3 km (a trace every 10 m). Figure 2.37 shows the a priori or initial velocity and temperature models used as input data for the inversion process. Figure 2.38 shows the inversion results both for the complete models and for the trace 135, situated at the abscissa 1.35 km. The results are promising (comparison of inversion results with real models at trace 135). Further developments may enhance the method’s applicability and accuracy in geothermal reservoir assessment (Yang et al., 2024). Figure 2.36 Velocity and temperature full waveform inversion (after Yang et al., 2024). Real models: velocity (a) and temperature (b).
RkJQdWJsaXNoZXIy NjA3NzQ=