In geothermal developments the highest cost is connected with drilling. Old production oil or gas wells can be used for geothermal heat exploitation. One of the possibilities is running the wells as borhole heat exchanger (BHE). At present the number of wells in Poland appropriated for liquidation is about 3 thousand. This report presents the idea of a pilot project utilising oil wells as BHE. The Iwonicz Zdr??j oil Field is located in a spa resort in the Carpathians (S-Poland). It was discovered in 1890 and at present theresources of oil and gas are nearly depleted (97,5% of the gas and 97,7% of the oil are exploited). Two wells, located in the Iwonicz Zdr??j oil field, are close to a large heat consumer. These wells, which are both appropriated for liquidation were thoroughly analysed as BHE. The analysis includes technical-economical aspects of adapting the wells for BHE and to exploit the heat. The paper includes the conclusion of the analysis and presents the idea of optimal BHE exploitation parameters and utilisation of the heat.The analysis of the cost of well adaptation, including heat pump and surface pipelines, shows that it can be lower than the cost of well liquidation. After that, the contractor takes profits connected with heat generation. The verification of results will be possible only by building a pilot installation. There is much to be said about the development ofthe pilot BHE installation in Iwonicz Zdr??j. First of all it is the ecological aspect (Iwonicz Zdr??j is a spa) and a high number of wells in the oil field, which will be closed very soon.

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