1887

Abstract

Summary

Strong scattering perturbations like large-scale salt structures in the model parameters make the task of full waveform inversion more difficult than the weak scattering inversion. The problem becomes even tougher when both the velocity and density are involved. In this work, we introduce an angle domain method using the direct envelope inversion with the new Fréchet derivative to solve the strong scattering inversion for velocity and density. The direct envelope inversion method works well on salt structure recovery for the velocity model. However, it fails if the density parameter is considered. By adding angle information into the inversion, tradeoff between velocity and density can be greatly reduced. Numerical examples show that by accomplishing the direct envelope inversion in the angle domain, both the velocity and density estimation with strong scattering perturbations are greatly improved.

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/content/papers/10.3997/2214-4609.201901006
2019-06-03
2020-03-31
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