边界系数法在高密度电阻率法正反演解释中的应用效果研究

摘要

通过“高密度电法微测系统”模型实验、有限单元法数值模拟、圆滑约束最小二乘法反演,探讨边界效应影响下的高密度电阻率法异常体边界的确定问题,研究异常体边界在反演断面上呈现的电阻率值与异常体边界两侧电阻率值间存在的统计关系.结果表明在高密度电法数据反演时,存在电阻率的过渡区域,异常体边界位于该过渡区域中,异常体边界在反演断面上呈现的电阻率可由异常体边界两侧电阻率值统计得出.异常体边界在反演断面上呈现的电阻率值取决于异常体界面两侧的电阻率值.%By means of the high-density micro-electrical measurement system, the numerical simulation forward modeling and smooth-constrained least-squares method inversion, this paper analysed the way to obtain the abnormal body interface under the border-effect and studies the statistical relation between the resistivity value of the border and the resistivity values on both sides of the border that can be read on the inverse geoelectric section. The results show that there is a transition zone on the inverse geoelectric section and the border exists in the transition zone. And the resistivity value of the border can be obtained from the statistical relation. The resitivity value of the border depends on the resitivity values on both sides of the abnormal body interface.