Potential of geothermal energy production from depleted gas fields: A case study of Dodan Field, Turkey

The use of oil and gas wells for geothermal energy utilization is one of the recent applications to increase the contribution of renewable energy among the other energy resources of the countries. Turkey is one of the countries that has depleted oil and gas fields. In this study, we investigate the potential of geothermal energy production from a depleted carbon dioxide gas field in Turkey: The Dodan Gas field. A wide range of data is reviewed and used to assess the actual energy potential of the field by considering the uncertainty of the anisotropic reservoir parameters such as porosity, area, thickness, temperature, and fluid saturation. Dodan field has a low enthalpy brine ranging from 200 kJ/kg to 350 kJ/kg which can be utilized for direct-use applications such as green housing, agricultural drying, and district heating. Monte Carlo simulations showed that the field can be re-profited with the recoverable geothermal energy potential of 1.80 MWt, 2.44 MWt, and 4.80 MWt as a 90-percent probability for Upper Sinan formation, Garzan formation and Mardin group producing formations, respectively. (c) 2020 Elsevier Ltd. All rights reserved.