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Waveform tomography and inversion
- Full Waveform Inversion (FWI)
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Waveform tomography and inversion - Full Waveform Inversion (FWI) - - PowerPoint PPT Presentation
Waveform tomography and inversion - Full Waveform Inversion (FWI) - - PowerPoint PPT Presentation
Waveform tomography and inversion - Full Waveform Inversion (FWI) Unit 12 Slide #1 Slide #2 biondo@stanford.edu Slide #3 biondo@stanford.edu Slide #4 biondo@stanford.edu Slide #20 biondo@stanford.edu Slide #21 biondo@stanford.edu Slide #22
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FWI from long-offset (~50 Km) OBS
Kamei and Pratt, EAGE 2010
Recorded data Modeled data
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FWI from long-offset (~50 Km) OBS
Kamei and Pratt, EAGE 2010
Initial velocity from ray-tomography of refracted arrivals Final velocity from FWI of 1-9 Hz data
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FWI from long-offset (~50 Km) OBS
Kamei and Pratt, EAGE 2010
Normalized velocity update
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Initial velocity from ray-tomography
FWI from refractions & reflections
Sirgue et al., First Break 2010
Final velocity from FWI of 3.5-7 Hz data
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Intermediary velocity from FWI of 3.5 Hz data
FWI from refractions & reflections
Sirgue et al., First Break 2010
Final velocity from FWI of 3.5-7 Hz data Velocity depth slices at z=1,050 m Initial velocity from ray-tomography
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FWI from refractions & reflections
Sirgue et al., First Break 2010
WEM image with Ray Tomography velocity WEM image with FWI velocity
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FWI from refractions & reflections
Sirgue et al., First Break 2010
Migrated Image Depth slices at z=175 m FWI “Image”
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Ray Tomography velocity Depth slice (18,000 ft)
FWI for subsalt imaging - Velocity
Vingh et al., SEG 2010
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FWI for subsalt imaging - Velocity
Vingh et al., SEG 2010
biondo@stanford.edu
FWI velocity from 2.5-6 Hz data Depth slice (18,000 ft)
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FWI for subsalt imaging - RTM
Vingh et al., SEG 2010
RTM image with Ray Tomography velocity
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FWI for subsalt imaging - RTM
Vingh et al., SEG 2010
RTM image with FWI velocity
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Quiz #23
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