Background velocity inversion by phase along reflection wave paths

Abstract
A background velocity model containing the correct lowwavenumber information is desired for both the quality of the migration image and the success of waveform inversion. We propose to invert for the low-wavenumber part of the velocity model by minimizing the phase difference between predicted and observed reflections. The velocity update is exclusively along the reflection wavepaths and, unlike conventional FWI, not along the reflection ellipses. This allows for reconstructing the smoothly varying parts of the background velocity model. Tests with synthetic data show both the benefits and limitations of this method.

Citation
Yu*, H., Guo, B., & Schuster, G. T. (2014). Background velocity inversion by phase along reflection wave paths. SEG Technical Program Expanded Abstracts 2014. doi:10.1190/segam2014-0011.1

Publisher
Society of Exploration Geophysicists

Journal
SEG Technical Program Expanded Abstracts 2014

Conference/Event Name
SEG Technical Program Expanded Abstracts 2014

DOI
10.1190/segam2014-0011.1

Additional Links
http://library.seg.org/doi/abs/10.1190/segam2014-0011.1

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