This study investigates the geothermal-solar coupled heating system for oil pipelines, aiming to improve energy supply capacity, thermal stability, and safety for oil transportation while supporting the oil and gas industry's low-carbon transition. A comprehensive mathematical model is developed that integrates key aspects such as geothermal-soil heat transfer, energy conservation, control strategies, and pipeline thermodynamics. Simulation validation using climatic data from Jilin Province demonstrates that geothermal and solar energy interact dynamically, forming a complementary relationship. The system's thermal stability is influenced by factors such as geothermal heat extraction, solar collector area, and heat storage efficiency. Additionally, the coupled system's operational efficiency and adaptability to varying regional climates contribute to low-energy, low-emission heating, promoting sustainability in pipeline operations. The study provides valuable theoretical insights and practical engineering references for optimizing pipeline heating technologies and accelerating the green transition within the oil and gas industry.

Oil pipeline, Geothermal-solar heating, Multi-energy complementarity, Thermal stability, Climatic adaptability