| Citation: |
Er-yong Zhang, Dong-guang Wen, Gui-ling Wang, Wei-de Yan, Wen-shi Wang, Cheng-ming Ye, Xu-feng Li, Huang Wang, Xian-chun Tang, Wei Weng, Kuan Li, Chong-yuan Zhang, Ming-xing Liang, Hong-bao Luo, Han-yue Hu, Wei Zhang, Sen-qi Zhang, Xian-peng Jin, Hai-dong Wu, Lin-you Zhang, Qing-da Feng, Jing-yu Xie, Dan Wang, Yun-chao He, Yue-wei Wang, Zu-bin Chen, Zheng-pu Cheng, Wei-feng Luo, Yi Yang, Hao Zhang, En-lai Zha, Yu-lie Gong, Yu Zheng, Chang-sheng Jiang, Sheng-sheng Zhang, Xue Niu, Hui Zhang, Li-sha Hu, Gui-lin Zhu, Wen-hao Xu, Zhao-xuan Niu, Li Yang, 2022. The first power generation test of hot dry rock resources exploration and production demonstration project in the Gonghe Basin, Qinghai Province, China, China Geology, 5, 372-382. doi: 10.31035/cg2022038
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The first power generation test of hot dry rock resources exploration and production demonstration project in the Gonghe Basin, Qinghai Province, China
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Abstract
Hot dry rock (HDR) is a kind of clean energy with significant potential. Since the 1970s, the United States, Japan, France, Australia, and other countries have attempted to conduct several HDR development research projects to extract thermal energy by breaking through key technologies. However, up to now, the development of HDR is still in the research, development, and demonstration stage. An HDR exploration borehole (with 236 °C at a depth of 3705 m) was drilled into Triassic granite in the Gonghe Basin in northwest China in 2017. Subsequently, China Geological Survey (CGS) launched the HDR resources exploration and production demonstration project in 2019. After three years of efforts, a sequence of significant technological breakthroughs have been made, including the genetic model of deep heat sources, directional drilling and well completion in high-temperature hard rock, large-scale reservoir stimulation, reservoir characterization, and productivity evaluation, reservoir connectivity and flow circulation, efficient thermoelectric conversion, monitoring, and geological risk assessment, etc. Then the whole-process technological system for HDR exploration and production has been preliminarily established accordingly. The first power generation test was completed in November 2021. The results of this project will provide scientific support for HDR development and utilization in the future.
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References
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Er-yong Zhang, Dong-guang Wen, Gui-ling Wang, Wei-de Yan, Wen-shi Wang, Cheng-ming Ye, Xu-feng Li, Huang Wang, Xian-chun Tang, Wei Weng, Kuan Li, Chong-yuan Zhang, Ming-xing Liang, Hong-bao Luo, Han-yue Hu, Wei Zhang, Sen-qi Zhang, Xian-peng Jin, Hai-dong Wu, Lin-you Zhang, Qing-da Feng, Jing-yu Xie, Dan Wang, Yun-chao He, Yue-wei Wang, Zu-bin Chen, Zheng-pu Cheng, Wei-feng Luo, Yi Yang, Hao Zhang, En-lai Zha, Yu-lie Gong, Yu Zheng, Chang-sheng Jiang, Sheng-sheng Zhang, Xue Niu, Hui Zhang, Li-sha Hu, Gui-lin Zhu, Wen-hao Xu, Zhao-xuan Niu, Li Yang, 2022. The first power generation test of hot dry rock resources exploration and production demonstration project in the Gonghe Basin, Qinghai Province, China, China Geology, 5, 372-382. doi: 10.31035/cg2022038
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Figure 1.
Comprehensive chart of the lithology, reservoir temperature, and temperature gradients logs in the study area.
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Figure 2.
Geostress profile of the PTS using the ASR method.
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Figure 3.
Formation microscanner image of GH-01(a), GH-02(b), and GH-03(c) among the reservoir part.
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Figure 4.
The site view of HDR Exploration and production Demonstration Project in the Gonghe basin, China.
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Figure 5.
Schematic diagram of the trajectory of HDR well Group.
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Figure 6.
Injection pressure, rate, and volume curves during the reservoir stimulation.
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Figure 7.
Injection rate and pressure curves during the circulation.
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Figure 8.
Microseismic events during the large-scale stimulation at different stages. The figures sequentially show the different stages of microseismic development over time. The event points from large to small represent the energy from strong to weak.
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Figure 9.
The liquid sweep range by the time-frequency electromagnetic method after stimulation in 2021 (A_relative: Abnormal change of relative amplitude).
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Figure 10.
Different depth slices of hydraulic fracture permeability from the inversion of micro-seismic data