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 November 4, 2025. https://ager.yandypress.com/index.php/2207-9963/article/view/162.