DETECTING AND ESTIMATING ANISOTROPY ERRORS USING FULL WAVEFORM INVERSION AND RAY BASED TOMOGRAPHY
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Jun 30, 2016
app pub date -
Jan 13, 2015
filing date -
Jan 14, 2014
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Abstract
Anisotropy errors in seismic velocity data for a geophysical structure are detecting by obtaining seismic data for the geophysical structure, using conventional ray-based tomography to generate an initial model of the geophysical structure, the initial model containing initial values for Thomsen parameters velocity along an axis of symmetry, epsilon and delta, using a first inversion process preferably transmission-based full waveform inversion of the seismic data to obtain updated values for epsilon and using a second inversion process preferably ray-based reflection tomography of the seismic data to obtain updated values for velocity along the axis of symmetry.
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