Background velocity inversion by phase along reflection wave paths | Zendy

Han Yu | Zendy; Bowen Guo | Zendy; Gerard T. Schuster | Zendy

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Background velocity inversion by phase along reflection wave paths

Author(s) -

Han Yu,

Bowen Guo,

Gerard T. Schuster

Publication year - 2014

Publication title -

king abdullah university of science and technology repository (king abdullah university of science and technology)

Language(s) - English

Resource type - Conference proceedings

DOI - 10.1190/segam2014-0011.1

Subject(s) - inversion (geology) , ellipse , reflection (computer programming) , computer science , geology , algorithm , computer graphics (images) , seismology , mathematics , geometry , tectonics , programming language

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

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