Currently, there are 20-30 million decommissioned hydrocarbon wells worldwide, presenting an excellent opportunity for geothermal energy production. The debate over disused hydrocarbon wells revolves around whether to seal them to avoid potential issues or to reuse them to transition to sustainable energy. Shutting down these wells involves significant costs and challenges, including financial challenges, environmental risks such as pollution and methane leakage. One viable solution is to repurpose these wells to extract geothermal energy from existing deep hydrocarbon reservoirs, minimizing initial costs by 40 to 60% and resulting in revenue generation, reduction of leaking emissions, and maintenance of workforce involvement. Reusing of these wells must adapt to local energy demand, potential markets, existing infrastructure and technical obstacles.