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Turning high Resolution FWI Model into Reflectivity: a Case Study Using Sparse OBN
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Asia Petroleum Geoscience Conference and Exhibition (APGCE), Nov 2022, Volume 2022, p.1 - 5
Abstract
Full-waveform inversion (FWI) has been a very valuable tool for deriving accurate and detailed velocity models in various geological settings, especially for sub-salt imaging. By increasing the inversion frequency in FWI, more details and lithology related features start to show up in the inverted velocity model. It contains richer information, other than just providing a velocity model for migration. Migration image is usually considered as normal reflectivity of the sub-surface. A pseudo-reflectivity can be directly derived from the FWI velocity model without going through the migration route. The derived pseudo-reflectivity inherited the full benefits of FWI in terms of illumination compensation and noise reduction, and provides a supplementary volume to the migration image.