EAGE E-Lecture: Recent Advances in Ray Based Tomography by Gilles Lambaré

In the field of velocity model building there has been a strong focus over the last years on full waveform inversion methods, and much less on ray-based tomographic approaches. Tomographic approaches however remain the standard model building tool for seismic depth imaging, and have made very significant progress in recent years. They have improved in accuracy, flexibility, and turnaround with the development of industrial non-linear multi-layer approaches based on slope tomography. Good progress has also been made in joint inversion and the use of a priori information and constraints, mitigating the problem of lack of structural consistency and resolution of ray-based tomography. With tomography results currently giving an apparent frequency in the velocity model of up to 6 Hz and broadband acquisitions of down to 2 Hz, we have moved from a mid-frequency gap to an overlap of the resolution we can expect from ray-based tomography and imaging.

This video is part of EAGE Online Education Programme.