| Title | Study on the geothermal reservoir of Cambrian-Ordovician carbonate rocks in the north of North China Plain and its significance |
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| Authors | Fuli Sun, Liangyun Pan, Jianhua Yu, Chao Yin, Lisha Wang |
| Year | 2023 |
| Conference | World Geothermal Congress |
| Keywords | Geothermal resources, carbonate rocks, geothermal reservoir, Outlet water temperature, Genetic model |
| Abstract | Since geothermal resources are clean, renewable, and have substantial reserves, they are crucial for China to accomplish the Double Carbon target. Beijing, Tianjin, Hebei, Henan, Shandong, Jiangsu, Anhui, and other provinces and cities that are part of the North China Plain have developed economies, dense populations, and high energy demands. The North China Plain region has three primary groups of geothermal reservoirs: Tertiary sandstone, Cambrian-Ordovician, and Jixian System Wumishan. The Cambrian-Ordovician geothermal reservoir is the least utilized due to its complicated distribution and significant drilling risk. The degree of exploitation of each group of formation carbonate rocks varies greatly. This research of the Cambrian-Ordovician geothermal reservoir is based on the practice of geothermal development and use in the Wuji-Gaocheng region. The research demonstrates that in the North China Plain, the favorable target areas for the Cambrian-Ordovician carbonate are primarily distributed in the secondary uplift and slope areas of the depressional area; the effective geothermal reservoir is primarily developed in the lower plate of the fracture and the tectonic high part; the geothermal gradient is controlled by the uplift and the deep fault cutting through the basement; The enormous fracture in front of the mountain is used to convey the atmospheric precipitation-recharged geothermal water to converge in the tectonic high region of the carbonate geothermal reservoirs. In order to effectively reduce drilling risks and maximize resource production, it is important to analyze the distribution range, burial depth, reservoir thickness, and water temperature of the three sets of geothermal reservoirs in the North China Plain area. The development of the Cambrian-Ordovician carbonate geothermal reservoirs should be prioritized, while the other sets of geothermal reserves should be taken into consideration. |