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应用重、磁面积性测量成果推测地质构造位置、性质和基本特征,确定主控地质构造;并依据重力异常圈定盆地总体轮廓,利用局部变化特征划分次级凹陷和凸起,确定次级凸起部位和其边缘断裂带为寻找地热资源的有利部位.利用可控源音频大地电磁法(CSAMT)剖面测量成果,根据断裂带上的垂向地电断面上的视电阻率变化特征,推断断裂性质和深部的岩石破碎程度以及含水情况.根据二维地震测量,进一步确定断裂性质,推断出最佳含水部位,最终确定地热井井位.经钻探验证,成井结果与推断基本一致,打出了较理想的地热井.说明所采用的技术思路正确,应用综合物探勘查方法寻找隐伏的地热资源非常有效.
According to the results of gravimetric and magnetic area measurements, the location, nature and basic features of the geologic structure are deduced to determine the dominant geological structure. According to the gravity anomaly, the overall contour of the basin is delineated, and the secondary dimples and bumps are divided by the local variation characteristics to determine the secondary bump Site and its marginal fault zone are favorable sites for geothermal resources search.Based on the CSAMT profile measurement results, the fracture properties are deduced according to the change of apparent resistivity on the vertical geoelectric section of the fault zone And depth of rock fragmentation and water content.According to two-dimensional seismic measurements, to further determine the nature of the fracture, infer the best water-bearing parts, and ultimately determine the geothermal well.After drilling verification, well logging results and inference is basically the same, playing a more ideal Of the geothermal well.It is proved that the technical ideas adopted are correct and it is very effective to find the hidden geothermal resources by using the comprehensive geophysical prospecting method.