Waveform tomography and inversion - Full Waveform Inversion (FWI) - PowerPoint PPT Presentation

Waveform tomography and inversion - Full Waveform Inversion (FWI) Unit 12 Slide #1

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FWI from long-offset (~50 Km) OBS Kamei and Pratt, EAGE 2010 Recorded data Modeled data Slide #36 biondo@stanford.edu

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 Slide #37 biondo@stanford.edu

FWI from long-offset (~50 Km) OBS Kamei and Pratt, EAGE 2010 Normalized velocity update Slide #38 biondo@stanford.edu

FWI from refractions & reflections Sirgue et al., First Break 2010 Initial velocity from ray-tomography Final velocity from FWI of 3.5-7 Hz data Slide #39 biondo@stanford.edu

FWI from refractions & reflections Sirgue et al., First Break 2010 Initial velocity Velocity from depth slices ray-tomography at z=1,050 m Intermediary velocity from FWI of 3.5 Hz data Final velocity from FWI of 3.5-7 Hz data Slide #40 biondo@stanford.edu

FWI from refractions & reflections Sirgue et al., First Break 2010 WEM image with WEM image with Ray Tomography velocity FWI velocity Slide #41 biondo@stanford.edu

FWI from refractions & reflections Sirgue et al., First Break 2010 Depth slices Migrated Image at z=175 m FWI “Image” Slide #42 biondo@stanford.edu

FWI for subsalt imaging - Velocity Vingh et al., SEG 2010 Ray Tomography velocity Depth slice (18,000 ft) Slide #43 biondo@stanford.edu

FWI for subsalt imaging - Velocity Vingh et al., SEG 2010 FWI velocity from 2.5-6 Hz data Depth slice (18,000 ft) Slide #44 biondo@stanford.edu

FWI for subsalt imaging - RTM Vingh et al., SEG 2010 RTM image with Ray Tomography velocity Slide #45 biondo@stanford.edu

FWI for subsalt imaging - RTM Vingh et al., SEG 2010 RTM image with FWI velocity Slide #46 biondo@stanford.edu

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Quiz #23 Slide #48

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