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频谱激电法(SIP)因具有多参数(Cole-Cole参数)解释异常的能力,一直受到电法工作者的关注.一些学者提出了用电场振幅和相位反演Cole-Cole参数的方法,但由于电场振幅和相位对不同Cole-Cole参数的敏感程度不同,往往导致有些Cole-Cole参数较难反演,特别是频率相关系数和时间常数.本文提出了利用视复电阻率的实部和虚部加权反演的方法.该方法采用视复电阻率实部和虚部联合反演的策略,并在反演不同Cole-Cole参数时对实部和虚部的目标函数进行不同的加权.模型试算结果表明:这种反演方法不仅可以很好的反演零频电阻率和极化率,还可以显著提高频率相关系数和时间常数的反演效果.
Because of its ability to interpret anomalies with multiple parameters (Cole-Cole parameters), spectral acoustics (SIP) has attracted the attention of electrical law researchers.Some scholars have proposed a method of inverting Cole-Cole parameters by the amplitude and phase of the electric field, However, the sensitivity of different Cole-Cole parameters to different amplitudes and phases of electric fields often leads to the difficulty of inverting some Cole-Cole parameters, especially the frequency correlation coefficients and time constants. In this paper, In this method, the method of joint inversion of real and imaginary parts of apparent resistivity is adopted, and the objective function of real part and imaginary part is weighted differently when inverting different Cole-Cole parameters. The experimental results show that this inversion method can not only reverse zero frequency resistivity and polarizability well, but also significantly improve the inversion of frequency correlation coefficient and time constant.