283 10. Feasibility of monitoring cold fronts of geothermal doublets The schedule planned to start measurements late in the morning (allowing time to install and lower the probe to the bottom of the borehole) and complete measurements for four levels and all dipoles by early evening. The measurements were to be repeated at night to evaluate the signal-to-noise (S/N) ratio, expected to be better at night due to lower anthropogenic noise. However, the transition between cased and uncased sections was complicated to cross. In order to avoid any loss in the well we had to limit our acquisition inside the casing where induced currents may appeared and disturbed the response coming from the reservoir. Figure 10.5 Cross-section of the GEV3 production well where the measurements took place (credits: CFG).
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