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Hybrid Tomography and Full Waveform Inversion Velocity Model Updating for Shallow Velocity Anomalies
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Second EAGE/PESGB Workshop on Velocities, Apr 2019, Volume 2019, p.1 - 3
Abstract
Summary
Geologically reasonable, data-driven velocity model building is a critical process for seismic imaging, particularly when the velocity is strongly heterogeneous within a layer or structure. When such features are prominent in the shallow, disruption of the signal may propagate through a significant portion of the image. A hybrid tomography-FWI workflow incorporating image-guided tomography and phase-only reflection full-waveform inversion is proposed as a method for generating robust and detailed model updates in these situations. Application to a narrow azimuth streamer survey demonstrates the effectiveness of the method in yielding detailed model updates and simplified geological structures in the final image.
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