西集地区层状与带状热储并存的地热资源特征

Geothermal Resource Characteristics from the Coexistence of the Layered and Banded Geothermal Reservoir in Xiji Area, Beijing

为了研究层状热储和带状热储及两者并存的热储类型地热资源赋存特征,以北京通州西集地区为例,阐述了影响两种热储类型存在的热源、构造条件和储盖层分布等因素。结合地热勘探孔及区域地温场分布特征,分析了区内沿夏垫断裂带展布范围内层状热储与带状热储并存的地热资源条件,认为夏垫断裂两侧的两个不同构造单元内的地热资源赋存均为以侧向径流补给和深部大地热流供热的层状热储为主,夏垫断裂带是区内带状热储的结论,提出以此断裂及其影响带内作为进一步勘查开发中温地热资源的重点地区的思路和建议。

In order to study the occurrence characteristics of the geothermal resource belonging to the reservoir types which layered and banded geothermal reservoir coexisted, Xiji area was taken as an example in this article.We discussed the factors including heat source, tectonic environments and distribution of geothermal reservoir which affected the existence of the two geothermal reservoir types, and also analyzed the geothermal resource condition that layered and banded geothermal reservoir coexisted along the range of Xiadian fault zone through the existing geothermal drilling and distributing characteristics of regional geothermal field. So we considered that geothermal resource was dominated by layered geothermal reservoir which was mainly recharged by the side runoff and heated by the deep terrestrial heat flow in the two flanks of the Xiadian fault zone belonging to the two different tectonic units and the Xiadian fault zone was banded geothermal reservoir in the studying area. Then we proposed the Xiadian fault zone and its affecting range should serve as the priority areas for further exploring and developing the mid-temperature geothermal resource.