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对两种在频率域激发极化法中广泛采用的复Cole-Cole模型复电阻率频谱进行了理论对比分析.在参数取值相同时,二者复电阻率幅值和相位频谱存在较大差异;在同类参数变化量相同的情况下,两种模型复电阻率的幅值和相位变化量的频谱也不相同,相位变化量的差异大于幅值变化量的差异;不同的参数增加或减少时,对变化量的影响也不一样.研究揭示了在进行反演时因为两种模型选择上的不同,对反演结果造成差异的原因,为更深入研究激发极化效应机理,探究一种统一准确的极化模型提供了理论基础.
Two kinds of complex resistivity spectra of Cole-Cole model widely used in frequency-domain excitation polarization are compared theoretically.When the parameter values are the same, there is a big difference between the complex resistivity amplitude and the phase spectrum ; In the case of the same variation of the same parameters, the spectra of the amplitude and the phase change of the complex resistivity of the two models are different, and the difference of the phase variation is larger than the variation of the amplitude variation; when different parameters increase or decrease , The impact on the variation is also different.The study reveals the reasons for the differences between the two models in the inversion and the reasons for the differences in the inversion results.In order to further study the mechanism of the excitation polarization effect and to explore a unified The accurate polarization model provides the theoretical basis.