可控源音频大地电磁法在徐州贾汪地区地热资源勘查中的应用  

Application of CSAMT to geothermal exploration in Jiawang of Xuzhou City

作　　者：杨林[1] 朱首峰[1] 尚通晓[1] Yang Lin;Zhu Shoufeng;Shang Tongxiao(Geological Survey of Jiangsu Province,Nanjing 210018,Jiangsu,China)

机构地区：[1]江苏省地质调查研究院,江苏南京210018

出　　处：《地质学刊》2020年第3期326-331,共6页Journal of Geology

基　　金：江苏省地质勘查基金项目“徐州市贾汪地区地热普查”(苏财建[2010]332号)。

摘　　要：资源型城市不可避免会面临资源枯竭、城市转型发展和采空区治理等问题,而地下采空区的密集分布,成为运用物探手段探明地下地质情况的障碍。以江苏徐州贾汪地区为例,运用可控源音频大地电磁测深法进行地热资源勘查,通过变换收发距及位置,查明了区内地层结构、热储层埋深及断裂构造位置,经钻探验证,钻孔地层、含水层与物探推断结果基本吻合,井口水温为48℃,涌水量为43 m^3/h。研究结果为采空区物探方法的运用提供了依据。In resource-based cities,problems such as resource exhaustion,urban transformation and development,and goaf governance would inevitably occur,while the dense distribution of underground goaf becomes an obstacle to the exploration of underground geological conditions by means of geophysical exploration.Taking the CSAMT method for geothermal resource exploration in Jiawang area of Xuzhou as an example,the high-quality original data was obtained by constantly trying to change the transit distance and position.The stratigraphic structure,the buried depth of the thermal reservoir and the location of the faulted structure in the area were found out,providing a basis for drilling.Drilling verification shows that drilling strata and water-bearing horizon are basically consistent with the results of geophysical inference,the temperature of wellhead water is 48℃,the water yield is 43 m^3/h.The results provide a basis for the application of geophysical prospecting in goaf.

关 键 词：可控源音频大地电磁测深(CSAMT) 地热勘查 采空区 江苏徐州贾汪地区 

分 类 号：P314.3[天文地球—固体地球物理学]