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复电阻率法(CR)又称为频谱激电法(SIP),是一种重要的激电分支方法,在矿产勘查中应用非常广泛.然而,在实际的频谱激电野外观测资料中,总是会受到不同程度的电磁耦合效应的影响.因此,研究同时存在激发极化效应和电磁效应的复电阻率性质,对频谱激电法的实际数据处理具有一定的参考价值.本文首先在均匀半空间条件下,进行了复电阻率法的正演模拟.分析了频率、收发距的改变对视电阻率和视相位的影响.然后在有低阻异常体存在情况下,同时采用三维积分方程法和三维有限差分法,研究了不同条件下视电阻率和视相位的变化.最后,根据对正演模拟结果的分析,总结出不同程度的电磁耦合效应对视电阻率及视相位的影响规律,为准确分析异常提供了依据.
The complex resistivity method (CR), also known as the Spectral Electro-Magnetism Method (SIP), is an important method of branching in the field of mineral exploration and is widely used in mineral prospecting. However, in actual spectral field observations, total Is affected by the electromagnetic coupling effect of different degrees.Therefore, the study of the complex resistivity property which has both the excitation polarization effect and the electromagnetic effect has certain reference value for the actual data processing of the spectral agitation method.In this paper, Space model, the forward modeling of complex resistivity method was carried out, and the influence of the change of frequency, transmitting and receiving distance on apparent resistivity and phase phase was analyzed.At the same time, a three-dimensional integral equation method And three-dimensional finite difference method were used to study the changes of apparent resistivity and phase under different conditions.Finally, according to the analysis of forward modeling results, the effects of different degrees of electromagnetic coupling effects on apparent resistivity and phase- Provide a basis for accurate analysis of anomalies.