Abstract
In this paper, we investigate optimization algorithm of joint nonlinear AVOA inversion of PP+PS reflections in anisotropic media. Algorithm is based on the exact solution for PP and PS waves reflection coefficients in anisotropic HTI medium. The PP and PS wave’s reflections from the top of the anisotropic layer are examined. We use synthetic seismograms generated by ray method for the algorithm testing. We show that joint compressional and converted wave’s inversion allows increasing the robustness of the method and the accuracy of medium-parameter estimates. Coefficients of anisotropy are determined with better accuracy if signal-to-noise ratio is bigger than 5 for PP wave and bigger than 2 for PS wave.
Highlights
In this paper, we investigate optimization algorithm of joint nonlinear AVOA inversion of PP+PS reflections in anisotropic media
Что комплекс продольных и обменных волн повышает помехоустойчивость алгоритма и точность получаемых оценок параметров среды
We investigate optimization algorithm of joint nonlinear AVOA inversion of PP+PS reflections in anisotropic media
Summary
We investigate optimization algorithm of joint nonlinear AVOA inversion of PP+PS reflections in anisotropic media. Рассматривается случай отражения продольных и обменных волн от кровли анизотропного слоя. Для AVOA-инверсии продольных отраженных волн в анизотропных средах с контрастными границами был разработан нелинейный оптимизационный алгоритм, основанный на точном решении для плоско-волнового коэффициента отражения продольной волны [Лыхин, Нефедкина, 2017].
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