Zhongyue Lin, Kang Liu, Jing Liu, Dandan Geng, Kai Ren, and Zhihong Zheng. “Numerical Model for Geothermal Energy Utilization from Double Pipe Heat Exchanger in Abandoned Oil Wells”. Advances in Geo-Energy Research 5, no. 2 (April 22, 2021): 212–221. Accessed February 2, 2026. https://ager.yandypress.com/index.php/2207-9963/article/view/162.