激发极化测深数据反演方法及应用

Inversion Method and Application of Induced Polarization Sounding Data

在电阻率反演基础上,研究和分析了3种不同的极化率反演方法,即:线性反演方法、精确形式反演方法和非线性反演方法;通过一系列理论模型的对比,分析了这3种反演方法的反演效果。电阻率的反演是基于最小二乘原理建立的反演目标函数,并在反演方程中加入了大地电磁Occam反演方法的光滑度矩阵,提高了反演的稳定性;理论模型对比表明,线性和非线性2种反演方法是比较实用的,将这2种反演方法应用于新疆托里某铜矿的对称四极激电测深的数据处理中,取得了较好的应用效果。

In this paper, we study and analyze three methods for induced polarization data inversion, i. e. , the linear inversion, the exact formalism method and the nonlinear method, the induced polarization sounding inversion is based on the resistivity inversion. We analyze the differences of the inversion results for the three methods through the theoretical models. In the resistivity inversion, we establish the inverse objective function by using least square principle and use the smooth model of the Occam method to im- prove the stability. We believe the linear and the nonlinear methods are practical through the theoretical models, we apply the two inversion methods to a copper mine in Xinjiang of the symmetrical four-pole sounding data, and achieve the good application effect.