Joint inversion of the reflectivity and the velocity model

被引：0
作者：
Cabrales-Vargas A. [1 ]
Sarkar R. [2 ]
Biondi B.L. [2 ]
Clapp R.G. [2 ]
机构：
[1] Pemex Exploración y Producción, Tabasco, Villahermosa
[2] Stanford University, Stanford Exploration Project, Department of Geophysics, Stanford, CA
来源：
Geophysics | 2021年 / 87卷 / 01期
关键词：
algorithm; inversion; least squares; reflectivity; velocity analysis;
D O I：
10.1190/geo2020-0631.1
中图分类号：
学科分类号：
摘要：
During linearized waveform inversion, the presence of small inaccuracies in the background subsurface model can lead to unfocused seismic events in the final image. The effect on the amplitude can mislead the interpretation. We present a joint inversion scheme in the model domain of the reflectivity and the background velocity model. The idea is to unify the inversion of the background and the reflectivity model into a single framework instead of treating them as decoupled problems. We show that with this method, we can obtain a better estimate of the reflectivity than that obtained with conventional linearized waveform inversion. Conversely, the background model is improved by the joint inversion with the reflectivity in comparison with wave-equation migration velocity analysis. We perform tests on 2D synthetics and 3D field data that demonstrate both benefits. © 2022 Society of Exploration Geophysicists.
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