| 雄安新区深部储热构造探测研究与地热井优选技术 |
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| 关键词:deep thermal storage structure geothermal well optimization comprehensive exploration Xiongan New Area North China Basin |
| 基金项目:国家重点研发项目(编号: 2019YFB1504102);中国地质调查局地质调查项目(编号: DD20189114; DD20221677);中国地质科学院基本科研业务费项目(编号: JKY 202122);湖南省地质院科研项目基金项目(编号: HNGSTP202102);青海省科学技术厅应用基础研究计划项目(编号: 2019-ZJ-7062) |
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| 摘要: |
| Deep Geothermal Reservoir Structure Detection and Geothermal Well Optimization Technology in Xiongan New Area |
| This study aimed to summarize the geothermal formation law of high-temperature and high-yield geothermal wells in Yanling buried hill in Gaoyang geothermal field of Xiongan New Area, and provide reference for the detection of high-temperature and high-yield geothermal wells in the lower part of Xiongan New Area.In this study, the geothermal geological conditions and geothermal field background of Yanling buried hill geothermal field were systematically analyzed. Through the thermal control and thermal conductivity of Moho uplift, deep-large faults, inter-concave-convex structural pattern, and deep-shallow fault system, the indicative effects of geophysical field, regional hydrodynamic field, hydrochemical field and temperature field on geothermal field were summarized. On this basis, the main optimal layout basis of high temperature and high yield geothermal wells in the study area were determined: (1)Yanling buried hill is a low uplift near the deep depressions of Raoyang and Baxian. The Moho surface of the deep depression is relatively uplifted to form a relatively high temperature at the bottom. The heat flow converges from the bottom of the deep depression to the low uplift adjacent to the depression, which is beneficial to the formation of deep high temperature anomalies. (2)Yanling buried hill is close to the regional deep strike-slip fault-Maxi fault, and the gas reservoir in the inter-river section of Maxi fault is the mantle-derived helium anomaly area with R/Ra>1, indicating that Maxi fault may lead to deep mantle-derived heat ; faults and karst development on the east side of the buried hill, such as the outgoing faults, are conducive to the uprising of carbonate groundwater after deep circulation convection heating; (3)Yanling buried hill is relatively far from Taihang Mountain, and is not in the Anxin–Wen’an structural transformation zone which is closely related to Taihang Mountains recharge area, and is less affected by the cold water in the recharge area. It is close to the deep karst groundwater confluence area, which is conducive to the accumulation of heat flow. The successful implementation of geothermal wells with water temperatures of 123.4°C and 109.2°C at the wellhead of Yanling buried hill shows the scientific validity of deep carbonate geothermal well location optimization detection technology, demonstrating the optimization of deep high temperature and high yield geothermal wells in Xiongan New Area and North China Basin. |
| MA Yan,ZHANG Bao-jian,YAN Jin-kai,LI Yan-yan,ZHANG Yong-wei,ZHU Xi,GAO Jun,XING Yi-fei.2022.Deep Geothermal Reservoir Structure Detection and Geothermal Well Optimization Technology in Xiongan New Area[J].Acta Geoscientica Sinica,43(5):699-710. |
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