Two stages power generation test of the hot dry rock exploration and production demonstration project in the Gonghe Basin, northeastern Qinghai-Tibet plateau, China

作者：Eryong Zhang, Dong-guang Wen, Guiling Wang, Xian-peng Jin, Lin-you Zhang, Haidong Wu, Wenshi Wang, Chengming Ye, W. Weng, Kuan Li, WU Jin-sheng, Xianchun Tang, Chong-yuan Zhang, Qingda Feng, Sheng Lian, Lisha Hu, Guilin Zhu, Xing-long Xie, Bin Wu, Dan Wang, Xue Niu, Zhaoxuan Niu, Donglin Liu, Hui Zhang, Wenhao Xu, Shu-qing Yao, Li Yang · 发表于：China Geology · 年份：2024 · DOI：10.31035/cg2024082 · 被引用次数：12 · 研究领域：Geological and Geophysical Studies、Hydrocarbon exploration and reservoir analysis、Geological Studies and Exploration

ABSTRACT: The Hot Dry Rock (HDR) is considered as a clean and renewable energy, poised to significantly contribute to the global energy decarbonization agenda. Many HDR projects worldwide have accumulated valuable experience in efficient drilling and completion, reservoir construction, and fracture simulation. In 2019, China Geological Survey (CGS) initiated a demonstration project of HDR exploration and production in the Gonghe Basin, aiming to overcome the setbacks faced by HDR projects. Over the ensuing four years, the Gonghe HDR project achieved the first power generation in 2021, followed by the second power generation test in 2022. After establishing the primary well group in the initial phase, two directional wells and one branch well were drilled. Noteworthy progress was made in successfully constructing the targeted reservoir, realizing inter-well connectivity, power generation and grid connection, implementing of the real-time micro-seismic monitoring. A closed-loop technical validation of the HDR exploration and production was completed. However, many technical challenges remain in the process of HDR industrialization, such as reservoir fracture network characterization, efficient drilling and completion, multiple fracturing treatment, continuous injection and production, as well as mitigation of induced seismicity and numerical simulation technology.