| 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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| 引用本文：马岩,张保建,闫金凯,李燕燕,张永伟,朱喜,高俊,邢一飞.2022.雄安新区深部储热构造探测研究与地热井优选技术[J].地球学报,43(5):699-710. |
| DOI：10.3975/cagsb.2022.061601 |
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| 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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| 中文摘要:为了给雄安新区下步高温、高产地热井的探测提供借鉴, 需要归纳总结雄安新区高阳地热田雁翎潜山高温、高产地热井的成热地质规律。本文系统分析了雁翎潜山地热田地热地质条件与地温场背景, 通过对莫霍面上隆、深大断裂、凹凸相间构造格局、深浅断裂系统的控热、导热作用的综合研究, 总结归纳了地球物理场、区域水动力场、水化学场与温度场的多场耦合指示等探测评价技术对地温场的指示作用。在此基础上, 确定了研究区高温、高产地热井的主要优选布设依据: ①雁翎潜山是距饶阳、霸县深凹陷较近的低凸起, 深凹陷的莫霍面相对上隆使其底部形成相对较高的温度, 热流自深凹陷底部向与凹陷相邻的低凸起汇聚, 有利于形成深部高温异常; (2)雁翎潜山距区域深大走滑断裂——马西断层较近, 马西断层河间段气藏为R/Ra>1的幔源氦异常区, 指示马西断层有可能导通深部幔源热; 潜山东侧的出岸断裂等断裂岩溶发育, 利于碳酸盐岩地下水的深循环对流加热后上涌; (3)雁翎潜山距太行山相对较远, 且未处于与太行山补给区水力联系较密切的安新—文安构造变换带, 受补给区冷水影响较小; 距区域深部岩溶地下水汇流区较近, 有利于热流的集聚。雁翎潜山井口水温123.4°C、109.2°C地热井的成功实施, 说明了深部碳酸盐岩地热井位优选探测技术的科学有效性, 对雄安新区乃至华北盆地深部高温、高产地热井位的优选具有很好的示范意义。 |
| 中文关键词:深部储热构造 地热井优选 综合探测 雄安新区 华北盆地 |
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| Deep Geothermal Reservoir Structure Detection and Geothermal Well Optimization Technology in Xiongan New Area |
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| Abstract: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. |
| keywords:deep thermal storage structure geothermal well optimization comprehensive exploration Xiongan New Area North China Basin |
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