Assessment of the potential of the deep geothermal reservoirs in the eastern part of the Drava Depression based on analyses of their petrophysical properties : master's thesis

Uslijed napredovanja klimatskih promjena i porasta cijena fosilnih goriva zbog sve manjih rezervi iz konvencionalnih izvora, kao i nesigurnosti opskrbe prirodnim plinom koji se uvelike koristi za grijanje u kućanstvima, geotermalna energija sve više dobiva na značenju, kao obnovljivi izvor energije. Dravska depresija nalazi se u hrvatskom dijelu Panonskog bazenskog sustava, koji ima geotermalne gradijente iznad svjetskog prosjeka. U ovom radu provedena je početna procjena geotermalnog potencijala u istočnom dijelu Dravske depresije na temelju karte raspodjele prosječnih geotermalnih gradijenata te analiza karotažnih mjerenja u svrhu procjene poroznosti s ciljem identificiranja potencijalnih dubokih geotermalnih ležišta. Glavne analize izvršene su u programskom paketu „Interactive Petrophysics“, a karta prosječnog geotermalnog gradijenta izrađena je u računalnom programu „Petrel E&P software platform 2018“.With the advancing climate change and rising fossil fuel prices due to declining reserves from conventional sources, as well as the insecurity of natural gas supply, which is largely used for domestic heating, geothermal energy is gaining more and more importance as a renewable energy resource. Drava Depression is located in the Croatian part of the Pannonian Basin System which has geothermal gradients above the world average. In this thesis an initial assessment of the geothermal potential in the eastern part of the Drava Depression has been performed based on the map of average geothermal gradients and analyses of well log data that enabled identification of potential deep geothermal reservoirs. Main analyses were performed using „Interactive Petrophysics“ software package and the map of average geothermal gradient was created in „Petrel E&P software platform 2018“