Resolving Celtic Sea imaging anomalies through a multistage FWI and tomography workflow
- Guy Hilburn (TGS) | Matt Hart (TGS) | Jian Mao (TGS)
- Document ID
- Society of Exploration Geophysicists
- SEG International Exposition and Annual Meeting, 15-20 September, San Antonio, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Exploration Geophysicists
- Velocity analysis, Case history, Tomography, Full-waveform inversion, 3D
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- 8 since 2007
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The Crean survey in the Celtic Sea demonstrates a variety of interesting geological and kinematic features which necessitate a novel and adaptive processing flow, particularly in regard to velocity model building. Prominent shallow anomalies related to gas pockets and channels distort the deeper sediments which are of primary interest for exploration. Imaging challenges are addressed first through appropriate preparation of data with deblending, regularization, and multiple attenuation. A subsequent iterative model-building workflow uses interwoven passes of increasingly high resolution full-waveform inversion and image-guided tomography to generate a geologically reasonable, datadriven velocity model. The final imaging results resolve the shallow anomalies and yield great uplift in their underlying sediments, allowing for more reliable interpretation and production planning
Presentation Date: Monday, September 16, 2019
Session Start Time: 1:50 PM
Presentation Time: 4:45 PM
Presentation Type: Oral
|File Size||4 MB||Number of Pages||5|
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