Differential coefficient imaging of the longitudinal conductance in the transient electromagnetic sounding
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摘要: 通过对等效导电平面方法原理的阐述,指出了利用视纵向电导参数进行瞬变电磁测深资料解释的优越性。同时,为了提高对电性层位的分辨能力,在明确电导及其导数曲线物理含义的基础上,采用B样条函数对实测数据进行处理,实现了电导参数的微分成像。实践证明,采用该方法的成像结果与其他反演结果吻合较好,其“电性同相轴”以直观、形象的面貌清晰地展示了电性界面的分布形态。Abstract: This paper points out the advantages that the apparent longitudinal conductance is used to analyse the transient electromagnetic sounding data.On the other hand, for the sake of advancing the ability of distinguishing the electric layers, the road test data are processed adopting numerical means on the base of having ascertained the physical meanings of conductance and its differential curves, by this means we realize the differential coefficient imaging of the longitudinal conductance.Practices have proved that the results adopting this method tally with other inversion results very well, its "electricity event" clearly displayes the distributing configuration of the electric interface by via of the direct and visual feature.
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