献县地热田地温场特征及控热因素研究

献县地热田位于冀中台陷和沧县台拱2个构造单元之间，热储层自上而下可分为上第三系孔隙型热储层和基岩岩溶裂隙型热储层。分析了献县地热田的地热地质条件和地温场特征，从热源、地下水活动、地热流体成因和演变过程、岩性以及地质构造方面研究该地区地温场的控制因素。研究表明，献县地温场横向分布形态与地质构造单元相对应，纵向上受岩性和地下水活动的影响。地热田的主要水源为大气降水，热流沿断裂或基岩斜坡进行汇集，构造格局制约热流方向，是以热传导类型为主的平原圈闭型地热田。

Study on earth temperature field characteristics and heat controlling factors in geothermal field of Xianxian County

Xianxian County geothermal field is located between Jizhong depression and Cangxian County arch-platforms two tectonic units.Geothermal reservoir can be divided into Neogene pore type and bedrock karst fissure type from top to bottom.This paper first analyzed the geothermal geology and earth temperature field characteristics of Xianxian County geothermal field,and then from the heat source,groundwater activity,origin of geothermal fluid and evolution process,lithology and geological structure to analyze controlling factors of the region.The study showed that the transverse distribution shape of geothermal field corresponds to geological structure unit that were affected by lithology and groundwater activities in longitudinal direction.The main water source was atmospheric precipitation.The heat flux converge along faults or bedrock slope,and the tectonic framework restricted heat flux direction.It was a plain trap type geothermal field mainly of heat conduction type.