1887

Abstract

Summary

The present DC electric resistivity tomography cannot incorporate anisotropic media. The research on the resistivity anisotropy modelling and imaging is rather sparse. So, this study focuses on the resistivity anisotropic modelling and the Fréchet derivative computations, which are the pivotal components of nonlinear resistivity anisotropy inversion. We adopt the Gaussian quadrature grid method to design the new anisotropic modelling and apply the perturbation analysis to compute the sensitivities (Fréchet derivative) for six 2D anisotropic cases. With the designed synthetic models, we carry out the numerical experiments with three multi-electrode surveying configurations, which are DD, GD and SC array. What’s more, we present six resistivity cases to discuss the anisotropic modelling and show the sensitivity patterns of the three arrays with the Fréchet derivatives. In a conclusion, the DD array can characterize the anisotropic structures better and the sensitivities can reflect the changes from the dip angle and the strike of the plane the stratification.

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/content/papers/10.3997/2214-4609.201702116
2017-09-03
2024-04-16
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