综合地球物理方法在安徽泗县地区地热勘查中的应用  

Application of integrated geophysical method in geothermal exploration in Sixian county, Anhui province

作　　者：陈戈 张克松 张帅 CHEN Ge;ZHANG Ke-song;ZHANG Shuai(The First Institute of Hydrologic Engineering Geological Exploration,Anhui Geological Survey Bureau,Bengbu 233000,China)

机构地区：[1]安徽省地勘局第一水文工程地质勘查院,安徽蚌埠233000

出　　处：《地下水》2024年第6期142-145,共4页Ground water

摘　　要：地热资源勘查是地热资源开发和利用的基础,也是地球物理方法重要的应用领域。运用合适的地球物理方法组合,可更好地查明地热田的成因、类型和所处地质构造环境,提高地热田的勘查水平和勘查效果。通过在安徽泗县盘龙山景区和石龙湖湿地公园北部等地区及周边区域布置CSAMT法、微动探测及地温测量方法,初步查明区内地层、隐伏的断裂构造及地温场特征,掌握研究区地热资源分布规律,取得了较好的勘查效果。结果表明:研究区内白垩系、侏罗系地温梯度相对较高,平均地温梯度分别可达为2.70℃/100m、2.68℃/100m,而震旦系平均地温梯度约为1.68℃/100m,一定厚度的低热导率白垩系、侏罗系地层可以作为本区域的热储盖层,而其下部隐伏的富水性较好且断裂发育的震旦系地层,则可以作为理想的热储层。结合区内地温场分布特征认为研究区内的石龙湖湿地公园北部工作区的东北部区域(大路口-墩集一带区域)有望成为地热资源前景区。研究结论证明综合地球物理方法适用于沉积盆地型地热资源的勘查工作。The exploration of geothermal resources is the foundation of the exploitation and utilization of geothermal resources,and it is also an important application field of geophysical methods.The suitable combination of geophysical methods can better identify the genesis,type and geological tectonic environment of geothermal field,and improve the exploration level and exploration effect of geothermal field.By arranging CSAMT method,micromotion detection and geothermal measurement methods in and around Panlongshan Scenic spot and Shilonghu Wetland Park in Sixian County,Anhui Province,the formation,hidden fault structure and geothermal field characteristics in the area were initially identified,and the distribution of geothermal resources in the study area was mastered,and good exploration results were obtained.The results show that:The Cretaceous and Jurassic geothermal gradients in the study area are relatively high,with an average geothermal gradient of 2.70℃/100m and 2.68℃/100m respectively,while that of the Sinian system is about 1.68℃/100m.The Cretaceous and Jurassic strata with a certain thickness and low thermal conductivity can be used as the thermal reservoir cover in this area.The Sinian strata with good water richness and fracture development can be used as an ideal thermal reservoir.According to the distribution characteristics of geothermal field in the area,the northeast area of the northern working area of Shilonghu Wetland Park(Dalukou-Dunji area)in the study area is expected to be a promising area for geothermal resources.The results show that the comprehensive geophysical method is suitable for the exploration of geothermal resources in sedimentary basins.

关 键 词：地热资源 CSAMT法 微动探测 地温测量 热储层 

分 类 号：P314.1[天文地球—固体地球物理学] P6222[天文地球—地球物理学]