| 关中盆地浅层地热能赋存规律及资源量估算 |
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| 作者姓名： | 周阳 洪增林 张卉 曹晓凡 穆根胥 |
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| 作者单位： | 1.陕西省地质调查院,西安 710054; 2.陕西省水工环地质调查中心,西安 710068; 3.西北工业大学自动化学院,西安 710072; 4.西安科技大学地质与环境学院,西安 710054 |
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| 基金项目： | 陕西省公益性地质调查专项“陕西省大中型城市浅层地热能调查评价(编号: 20130202)”、陕西省公益性地质工作项目“陕西省浅层地热能赋存规律及开发利用关键技术研究(编号: 20170201)”、中国地质调查局 “陕西省关中盆地地热资源调查评价(编号: 1212010535416)”和“陕西省主要城市浅层地温能浅层地热能开发区1:5万水文地质调查(编号: 12120114086501-15)”项目联合资助 |
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| 摘 要： | 通过野外地质调查及室内综合研究,分析了关中盆地浅层地热能的开发利用情况、赋存特征和形成模式,并对资源量进行了估算,总结了盆地不同地貌单元、不同岩性的岩土体热物性参数特征,计算了区域恒温带深度和浅层大地热流值。关中盆地地热能的形成模式主要为热传导型和热对流型: 热传导型地热资源主要分布于西安凹陷、固市凹陷等完整地质块体内; 热对流型地热资源主要分布于深大断裂直接沟通地表的区域以及断裂带周边区域。采用层次分析法对关中盆地浅层地热能进行适宜性分区,认为关中盆地整体属于地埋管地源热泵系统适宜区或较适宜区,地下水地源热泵系统适宜区和较适宜区主要分布在盆地中部漫滩区和阶地区。利用热储法,计算关中盆地浅层地热能热容量为1.38×1016 kJ/℃,浅层地热能储量巨大,开发利用前景优良。
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| 关 键 词： | 关中盆地 地温场 浅层地热 形成模式 赋存规律 |
| 收稿时间： | 2019-02-18 |
Occurrence rules and resource estimation of shallow geothermal energy in Guanzhong Basin |
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| Authors: | ZHOU Yang HONG Zenglin ZHANG Hui CAO Xiaofan MU Genxu |
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| Institution: | 1.Shaanxi Institute of Geological Survey, Xi’an 710054,China; 2.Shaanxi Hydrogeology Engineering Geology and Environmental Geology Survey Center,Xi’an 710068, China; 3.School of Automation, Northwestern Polytechnical University,Xi’an 710072, China; 4.School of Geology and Environment Engineering, Xi’an University of Science and Technology, Xi’an 710054, China |
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| Abstract: | This paper analyzes the exploitation and utilization as well as the occurrence and formation pattern of geothermal energy in Guanzhong Basin through field investigation and indoor analysis. The resources were also estimated, and different geomorphic units and the characteristics of thermal properties of rocks and soils with different lithology were also summarized, with the calculation of the depth of the constant temperature layer and the earth heat flow values in the shallow layers. The formation patterns of geothermal energy in Guanzhong Basin are mainly thermal conduction type and thermal convection type. The thermal conductivity geothermal resources are mainly distributed in intact geological blocks such as Xi’an sag and Gushi sag, while the thermal convection geothermal resources are mainly distributed in areas where deep faults directly communicate with the surface and in the vicinity of the fault zone. In this paper, the analytic hierarchy process was applied in the suitability division of shallow geothermal energy in Guanzhong Basin. It is considered that Guanzhong Basin is basically suitable or less suitable for buried tube ground-source heat pump system. While the suitable and less suitable area of groundwater ground-source heat pump system is mainly distributed in the central floodplain and the terrace area of the basin. According to heat storage method, the heat capacity of shallow geothermal energy in Guanzhong Basin is 1.38×1016 kJ/℃. The results show that the shallow geothermal reserves in Guanzhong Basin are huge and the development prospects are excellent. |
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| Keywords: | Guanzhong Basin ground temperature field shallow geothermal formation pattern occurrence rule |
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