289 10. Feasibility of monitoring cold fronts of geothermal doublets the probe into the GEV3 well was very complicated. The risk of the probe getting stuck is omnipresent, making insurance and risk assessment crucial. Ideally, the measurement should be conducted in the uncased section of the well. There are two main challenges to overcome for this: 1. Obtain authorization to access this zone of the well, where logging tools face a higher risk of getting stuck. 2. Have the physical ability to enter this zone. During this survey, we could not exceed the cased section during the first attempt. Despite repeated efforts by the operator, the probe could not pass through and became temporarily stuck. As a result, measurements were conducted in the cased section of the well. In this case, we currently lack the capability to properly process the data to extract information about the cold front beyond its detectability. Instrumental and algorithmic developments will thus be necessary to further this concept. Given the undeniable need to monitor the “cold front” and its associated economic implications, it is important to continue exploring solutions to overcome the barriers identified during this project. Figure 10.10 Scheme showing the three different geometries between TX-RX modelled to assess the detectability of the cold front.
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