1887

Abstract

Summary

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. Moreover, they have made significant progress in recent years, reinforcing their position. They have improved in accuracy, flexibility, and turnaround with the development of industrial non-linear approaches based on slope tomography. Based on these approaches, tomographic approaches have been used to solve in an elegant and efficient way the challenges of global updates for multi-layer velocity models. 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. Taking advantage of both in a combined approach could be one of the next challenges of seismic imaging.

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/content/papers/10.3997/2214-4609.20141151
2014-06-16
2024-04-20
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