@article{article_1642591, title={Investigation Of Heat Transfer and Joule-Thomson Effect in Wells of Depleted Oil and Gas Reservoirs Used For Carbon Dioxide (CO2) Storage}, journal={El-Cezeri}, volume={12}, pages={298–310}, year={2025}, DOI={10.31202/ecjse.1642591}, author={Kon, Okan and Caner, İsmail}, keywords={Karbondioksit depolama, rezervuar, ısı transferi, Joule-Thomson etkisi, ekserji analizi}, abstract={This study investigated the heat transfer mechanisms and the Joule-Thomson effect at the wellhead while storing carbon dioxide (CO₂) in depleted oil, gas, and coal reservoirs. It was assumed that the injected CO₂ for storage is in a single-phase pure state. In the reservoir well, convection heat transfer along the wellbore and conduction heat transfer with the surrounding rock soil were analysed during the production of CO₂ to the surface. Additionally, the cooling effect at the wellhead caused by the Joule-Thomson effect was examined. A positive value of the Joule-Thomson coefficient indicated the presence of a cooling effect. For the production well, the study considered temperatures of 30, 51, and 78 °C, pressures of 3.8, 4.3, and 6.1 MPa, and well depths of 1000, 1700, and 2600 meters. Six different rock-soil types surrounding the production well at the reservoir head were included, with a thermal gradient of 25 °C/km and a CO₂ flow velocity of 1 m/s. The calculated difference in conduction and convection heat loss between the wellhead entry and exit ranged from 23.918 to 481.980 W. The Joule-Thomson coefficient was found to vary between 6.797 and 17.91 0C/MPa, depending on the depth and temperature of the well. The change in exergy efficiency due to the Joule-Thomson effect (throttling exergy) was calculated to vary between 3.042 and 10.766.}, number={3}, publisher={Tayfun UYGUNOĞLU}