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Subwavelength Imaging using Seismic Scanning Tunneling Macroscope Field Data Example

Subwavelength Imaging using Seismic Scanning Tunneling Macroscope Field Data Example. G. Dutta , A . AlTheyab , S. Hanafy , G. Schuster. King Abdullah University of Science and Technology, Saudi Arabia. September 19, 2012. Outline. Motivation Background Theory Kaust Field Experiment

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Subwavelength Imaging using Seismic Scanning Tunneling Macroscope Field Data Example

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  1. Subwavelength Imaging using Seismic Scanning Tunneling Macroscope Field Data Example G. Dutta, A. AlTheyab, S. Hanafy, G. Schuster King Abdullah University of Science and Technology, Saudi Arabia September 19, 2012

  2. Outline • Motivation • Background • Theory • Kaust Field Experiment • Qademah Field Experiment • Conclusions

  3. Outline • Motivation • Background • Theory • Kaust Field Experiment • Qademah Field Experiment • Conclusions

  4. Why is Resolution Important ? 0 km 3 km ? 0 km7 km 0 km7 km KM image Least Squares KM image

  5. Outline • Motivation • Background • Theory • KAUST Field Experiment • Qademah Field Experiment • Conclusions

  6. Background • Rayleigh Resolution • Abbe Resolution Z Depth • De Fornel (2001) and Jia et al. (2010) got super-resolution in optical imaging.with evanescent waves. Δx Can we achieve ??? • Schuster et al. (2012) used SSTM to get super-resolution with numerical experiments.

  7. Outline • Motivation • Background • Theory • Kaust Field Experiment • Qademah Field Experiment • Conclusions

  8. Seismic Scanning Tunneling Macroscope Sources r Scatterer Receivers Post-stack migration image (Schuster et al. 2012):

  9. Seismic Scanning Tunneling Macroscope Post-stack migration image: r 0.2 0.7 0.2 0.7 S’ 0.2 0.7` Near field resolution Far field resolution

  10. Outline • Motivation • Background • Theory • KAUST Field Experiment • Qademah Field Experiment • Conclusions

  11. Layout of the Field Experiment Scatterer near shot 12 Line 1 Line 5 Line 4 Line 3 Line 2 Sources

  12. Layout of the Field Experiment

  13. Common Shot Gathers a) CSGs before putting any scatterer b) CSGs after burying a scatterer

  14. Migration Images R R Without Scatterers With Scatterers

  15. Resolution at full bandwidth of the data 0.6 m 1.2 m

  16. Resolution at half bandwidth of the data 0.6 m

  17. Outline • Motivation • Background • Theory • KAUST Field Experiment • Qademah Field Experiment • Conclusions

  18. Qademah Field Experiment with no scatterer

  19. Qademah Field Experiment with one scatterer

  20. Qademah Field Experiment with two scatterers

  21. Migration Images R R With scatterers Without scatterers Actual Source Location 15 m Trial Source Location

  22. Migration Images R R With scatterers Without scatterers Actual Source Location Trial Source Location

  23. Migration Image for the weaker scatterer With scatterers Without scatterers R Actual Source Location R Trial Source Location

  24. Outline • Motivation • Background • Theory • KAUST Field Experiment • Qademah Field Experiment • Conclusions

  25. Conclusions • Scatterers can be imaged with subwavelength resolution with SSTM. • Field data results show a super-resolution signature of . • Direct arrivals, surface waves and ground roll need to removed during preprocessing.

  26. Acknowledgements • We would like to thank • King Abdullah University of Science and Technology • Society of Exploration Geophysicists • Chamber of Geophysical Engineers of Turkey

  27. THANK YOU !!!

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