井地密集阵列三维电阻率/极化率观测方法的理论模型研究

Theoretical Model in the Observation Method of Borehole-ground Dense Array 3D Resistivity/Polarizability

阐述了井地密集阵列三维电阻率/极化率观测系统及观测方法,并采用有限单元法正演相关模型,分析其二维断面和三维空间异常特征。二维与三维视电阻率、视极化率异常形态对比表明,井地密集阵列三维电阻率/极化率观测系统在提供大量的观测数据前提下,三维显示的视电阻率、视极化率异常可以有效探测地下地质体位置、电性;通过对不同地质模型异常特征的分析研究,为金属矿勘查中的井中激发极化技术研究提供一些理论依据。

Borehole--ground dense array three--dimensional resistivity/ polarizability ob- servation system and the observation method are described. The finite element method of the forward models is adopted to analyze 2D section and 3D space anomalous features. The comparison of the anomalous conditions of 2D and 3D apparent resistivity and apparent po- larizability indicates that the borehole--ground dense array three--dimensional resistivity/ polarizability observation system can provide a large number of observation data. The three --dimensional resistivity and polarizability anomalous features could effectively detect the geologic body position and the electrical characteristics; According to an analysis of the dif- ferent geological model anomalous features, this paper provides some theoretical bases for in--hole induced polarization in metallic ore exploration.