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Application of FWI to Resolve Gas Cloud Velocity Anomaly in Deep Water Gulf of Mexico
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 74th EAGE Conference and Exhibition incorporating EUROPEC 2012, Jun 2012, cp-293-00719
- ISBN: 978-90-73834-27-9
Abstract
Typically, we resort to ray-based tomography on CIGs to obtain velocities for prestack depth imaging. However, this workflow does not produce high resolution velocity models in the presence of complex geology because of the inherent limitations of ray-based tomography. In this paper, we have applied 3D anisotropic full waveform inversion to deep water GOM narrow-azimuth towed-streamer survey to resolve a complex gas pocket surrounded by radial faults. The FWI velocity updates are conformal to the structures, especially, the faults and the gas cloud. Furthermore, we observe improved focusing of the migrated image and the residual curvature of the common image gathers thereby validating the FWI velocity update.