| 摘要 |
Anisotropy errors in seismic velocity data for a geophysical structure (165) are detecting by obtaining seismic data for the geophysical structure (167), 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 (166), using a first inversion process preferably transmission-based full waveform inversion of the seismic data to obtain updated values for epsilon (168) 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 (174). |
