[en] The REPRESS project aims to collect, bank, analyze and disseminate thermal response test (TRT) reports, and to develop a method for estimating the energy potential of vertical geothermal probes at regional level. A total of 192 TRT reports were analysed. At national level, a regression was established for calculating initial ground temperature as a function of coordinates, probe head altitude and probe depth. This regression provides a more reliable prediction of initial temperature than an estimate based on RT2012 regulatory temperatures, particularly at higher altitudes corresponding to lower temperatures. A lithological cross-section was established for 64 boreholes. Conductivity values per lithology defined by Swiss standard SIA-384/6 were established. The results show that for the five most represented lithologies, namely limestone, marl, water-saturated clay, water-saturated sand and granite, in decreasing order of drilled length, the estimated conductivity is within the range of values suggested by SIA-384/6. In particular, these values appear reliable for the two main lithologies: the thermal conductivity of limestone is slightly lower (2.4 W.K^-1.m^-1) than the value recommended by SIA-384/6 (2.8 W.K^-1.m^-1), while the difference for marl is less than 0.2 W.K^-1.m^-1. A database was developed to store and disseminate test results. The main banked test results, in particular thermal conductivity and initial temperature, can be consulted in a dedicated layer on the map area of the 'geothermal perspectives' website. A method for estimating the energy potential of geothermal probes has been developed and applied to the Centre-Val de Loire and Poitou-Charentes regions, for which thermal conductivity models are available at depths of 0-50 m, 0-100 m and 0-200 m respectively. The initial temperature was estimated using the regression method described above. This method makes it possible to estimate the amount of heat that can be extracted from a probe while complying with a set minimum evaporator outlet temperature criterion, in this case - 3.0 deg. C, the regulatory limit for boreholes drilled under the Small-scale geothermal energy regulations. Solicitation dynamics are determined by regulatory climate zone. Extractable energy per linear drilled section ranges from 70 to 150 kWh.ml^-1.yr^-1. Finally, a comparison with ten available TRTs shows that the difference between the minimum temperature of the heat transfer fluid estimated by the map data and that estimated by the TRT can be as much as 4 deg. C, which is not negligible. So energy maps and the underlying temperature and conductivity maps are no substitute for TRT for large-scale projects