Download - Wavefield seismic imaging
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Wavefield seismic imaging
Paul Sava
Center for Wave PhenomenaColorado School of Mines
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Wide-azimuth imaging
Elastic wavefield imaging
Interferometric imaging
Stereographic imaging
Stream computing
![Page 3: Wavefield seismic imaging](https://reader031.vdocuments.us/reader031/viewer/2022012020/61688d6dd394e9041f708420/html5/thumbnails/3.jpg)
Wide-azimuth imagingsynopsis
I Wide-azimuth acquisition
I Narrow-azimuth processing
I We need to develop methods forI illumination compensationI multiples suppressionI model building (velocity, anisotropy)
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Wide-azimuth imagingCWP research
Migration by wavefield extrapolation
I Wide-azimuth wavefield extrapolation
I Extended (cross-correlation) imaging condition
I 3D angle decomposition
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Wide-azimuth imaging
Elastic wavefield imaging
Interferometric imaging
Stereographic imaging
Stream computing
![Page 6: Wavefield seismic imaging](https://reader031.vdocuments.us/reader031/viewer/2022012020/61688d6dd394e9041f708420/html5/thumbnails/6.jpg)
Elastic wavefield imagingsynopsis
I Multi-component (vector) acquisition
I Single-component (scalar) processing
I We need to develop methods forI anisotropic elastic imagingI amplitude reconstructionI model building (anisotropy)
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Elastic wavefield imagingCWP research
Multi-component reverse-time migration
I Vector wavefield extrapolation
I Wavefield decomposition in pure wave modes
I Conventional/extended imaging condition
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Wide-azimuth imaging
Elastic wavefield imaging
Interferometric imaging
Stereographic imaging
Stream computing
![Page 12: Wavefield seismic imaging](https://reader031.vdocuments.us/reader031/viewer/2022012020/61688d6dd394e9041f708420/html5/thumbnails/12.jpg)
Interferometric imagingsynopsis
I Depth migration assumes exact velocity
I Velocity analysis produces approximate velocity
I We need to develop methods forI imaging heterogeneous and irregular saltI imaging complex stratigraphyI imaging basalt, carbonates, etc.
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Interferometric imagingCWP research
Interferometric imaging condition
I Wavefield extrapolation in background model
I Image-space interferometric imaging
I Local averaging for statistical stability
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Wide-azimuth imaging
Elastic wavefield imaging
Interferometric imaging
Stereographic imaging
Stream computing
![Page 21: Wavefield seismic imaging](https://reader031.vdocuments.us/reader031/viewer/2022012020/61688d6dd394e9041f708420/html5/thumbnails/21.jpg)
Stereographic imagingsynopsis
I Data interpretation exploits wavefield structure
I Imaging condition ignores wavefield structure
I We need to develop methods toI eliminate cross-talk due to multiple sourcesI eliminate cross-talk due to multi-pathingI eliminate cross-talk due to multiple reflectionsI eliminate cross-talk due to multiple wave-modes
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Stereographic imagingCWP research
Stereographic imaging condition
I Wavefield decomposition prior to imagingI propagation timeI local slope
I Sparse wavefield representation
I Imaging condition in decomposition domain
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Wide-azimuth imaging
Elastic wavefield imaging
Interferometric imaging
Stereographic imaging
Stream computing
![Page 31: Wavefield seismic imaging](https://reader031.vdocuments.us/reader031/viewer/2022012020/61688d6dd394e9041f708420/html5/thumbnails/31.jpg)
Stream computingsynopsis
I Process seismic data on distributed systems
I Moore’s Law is dead! Long live Amdahl’s Law!
I We need to develop methods toI use new computer architectureI use new computing models (streams)
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Stream computingCWP research
Stream processing of seismic data
I Multi-core processing
I Stream processing on GPUs
I Benchmark: finite-difference modeling