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Including Internal Multiples in Imaging and Velocity Updating: Potential and Limitations
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 82nd EAGE Annual Conference & Exhibition - Workshop Programme, Oct 2021, Volume 2021, p.1 - 3
Abstract
In many areas around the world the impact of internal multiples on seismic data can be strong, due to large subsurface contrasts. There is a choice of removing these multiples in advance and apply primaries-only imaging. Such a method often requires densely sampled data, especially for Marchenko-based approaches. If data sampling is coarser, an image-driven approach can be adequate, where the Earth model is used as a constraint in the inversion. Such an approach is followed by full wavefield migration (FWM) and joint migration inversion (JMI), where the subsurface is parametrized by reflectivity and a velocity model. In this way, internal multiples, together with transmission effects, can be handled and an imprint-free image is ideally obtained. In this paper, the potential and limitations of this approach will be analyzed.