Abstract
Publisher Summary This chapter presents an evaluation of geothermal low enthalpy resources. The problem of evaluating geothermal low enthalpy resources could seem like the evaluation of any mineral resource; however, technical and economic motives require the development of specific methods. In the case of geothermal low enthalpy energy, the production costs, which have to be compared with the cost of substitutes to determine exploitable resources, depend not only on aquifer characteristics and production conditions but also on the potential demand characteristics such as localization, level of heat needs, seasonal variation of needs, and technologies employed. This is the reason the method that the Bureau de Recherches Geologiques et Minieres (BRGM) is developing distinguishes two consecutive levels of analysis. The first level of analysis consists in studying potential resources. This study is only done in physical terms and aims to gather basic data about hot aquifers for all the French territory. The second level of analysis consists in determining the extent of recoverable resources in given economic conditions and at a fixed date. This determination is made in each area having potential resources by comparing for every heat demand the cost of geothermal supplies and the cost of conventional substitutes.
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