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通过对电法勘探中常用的温纳和二极装置的感度分布特征的分析,本文提出了根据感度分布规律对两种电极装置在井-地电阻率法成像中所获得的视电阻率数据进行标记的方法.通过构建含断裂带的三维地电模型,并采用有限单元法模拟计算测量结果,对比已知模型,验证了该方法的可靠性.利用温纳和二极装置,分别针对野外钻孔进行了井内和井-地高密度电阻率成像(ERT),分析了不同电极装置对成像结果的影响.所得结果初步揭示了钻孔周围几十米空间内的地电结构分布特性,取得了良好的应用效果.
Based on the analysis of the sensitivity distribution characteristics of the WENER and diode devices commonly used in electrical prospecting, this paper presents the data of apparent resistivity obtained from well-ground resistivity imaging of two kinds of electrode devices based on the distribution of sensitivity This method is validated by constructing a three-dimensional geoelectric model with a fracture zone and using finite element method to simulate the measurement results and comparing with the known model.Using WENNER and diode devices, Hole and well-well high-density resistivity imaging (ERT) were performed to analyze the effect of different electrode devices on the imaging results.The results obtained initially revealed the distribution of geoelectric structures in the tens of meters around the borehole, Good application effect.