Decades ago, geothermal energy was not considered economically viable enough to make a significant contribution to the energy mix. However, as the world increasingly prioritizes cleaner energy sources, there has been growing interest in understanding and incentivizing the production of geothermal energy. This study examines the potential for repurposing end-of-life oil wells for geothermal energy production, and investigates the impact of various operational and reservoir parameters on heat production. To achieve this, a sensitivity analysis was conducted on several key variables, including fluid circulation rate, core tube insulation depth, reservoir temperature, rock formation thermal conductivity and formation heat capacity. The study evaluated the impact of these variables on fluid production temperature, heat production and required pump power. The findings demonstrate the significant impact of each variable on the system, providing insights into geothermal heat production and helping to identify optimal operational conditions. This information is crucial for further economic considerations, as it can inform decisions on whether or not to pursue geothermal energy production in specific locations. In conclusion, this study highlights the potential for repurposing end-of-life oil wells for geothermal energy production, and provides important insights into the key parameters affecting heat production. As the world continues to seek out cleaner energy sources, these findings can have significant implications for the future of the energy industry.

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