一种利用频谱激电数据实部和虚部加权反演Cole-Cole模型参数的方法

发布时间：2019-06-12 04:59

【摘要】：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.
[Abstract]:Spectral IP (SIP) has been paid more and more attention by electrical law workers because of its ability to interpret anomalies with multiple parameters (Cole-Cole parameters). Some scholars have proposed a method to invert Cole-Cole parameters by amplitude and phase of electric field. However, due to the different sensitivity of electric field amplitude and phase to different Cole-Cole parameters, some Cole-Cole parameters are often difficult to be inversed, especially the frequency correlation coefficient and time constant. In this paper, a method of weighted inversion of real and imaginary parts of apparent complex resistance is presented. In this method, the strategy of joint inversion of real part and imaginary part of apparent complex resistance is adopted, and the objective functions of real part and imaginary part are weighted differently when different Cole-Cole parameters are inversed. The experimental results of the model show that this inversion method can not only retrieve zero frequency resistivity and polarizability, but also significantly improve the inversion effect of frequency correlation coefficient and time constant.
【作者单位】：吉林大学地球探测科学与技术学院;吉林大学地球科学学院;核工业二四三大队;
【基金】：吉林省长白山地区地热资源调查([2014]地勘13-13)资助
【分类号】：P631.324

【相似文献】