综合物探法在蓝田地区地热勘查中的应用

Application of integrated geophysical methods to the geothermal exploration in Lantian area

蓝田县区广泛覆盖新生代地层,且厚度较大,在该区域,音频大地电磁法(AMT)对断裂构造具有良好的横向分辨能力,放射性测氡则对断裂构造的平面位置有较好的反映。通过勘查结果,再结合有关地质、水文、钻井资料进行综合推断,基本查清了工区内深部地层、热储层和断裂构造的位置和埋深,取得了较好的勘查效果。

Lantian County is widely covered by Cenozoic strata with the relatively large thickness.In order to search for the geothermal resources in this area,it is necessary to find out the characteristics of the thermal,caprocks and fault structures.In this area,the AMT has the better transverse resolution of fault structures,and radioactive radon measurement has the better reflection on the plane position of fault structures.Through the information of geology,hydrology,drilling and coupling with the radioactive prospecting comprehensive inference,the position and buried depth of the deep strata,thermal reservoirs and fault structures in the area are investigated,and the good exploration results have been obtained.