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Seismic interferometry-by-deconvolution for controlled-source and passive data

Seismic interferometry-by-deconvolution for controlled-source and passive data Kees Wapenaar, Joost van der Neut, Elmer Ruigrok, Deyan Draganov, Juerg Hunzicker, Evert Slob, Jan Thorbecke 70 th annual EAGE meeting June 11, 2008 Rome. Contents.

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Seismic interferometry-by-deconvolution for controlled-source and passive data

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  1. Seismic interferometry-by-deconvolution for controlled-source and passive data Kees Wapenaar, Joost van der Neut, Elmer Ruigrok, Deyan Draganov, Juerg Hunzicker, Evert Slob, Jan Thorbecke 70th annual EAGE meeting June 11, 2008 Rome

  2. Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions

  3. Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions

  4. Seismic interferometry by cross-correlation

  5. Seismic interferometry by cross-correlation

  6. Seismic interferometry by cross-correlation Uncorrelated noise sources

  7. Seismic interferometry by cross-correlation Cross-correlation virtual source target

  8. The correlation function is in a specific way related to the Green’s function e.g. Seismic interferometry by cross-correlation Summary:

  9. Seismic interferometry by cross-correlation • Properties: • Requires no knowledge about sources and medium • Trace-by-trace process • Sources on closed surface (except on free surface) • Sensitive to irregular source distribution • Medium is assumed lossless

  10. Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions

  11. Correlation approach:

  12. Correlation approach: Deconvolution approach:

  13. Correlation approach: data data Deconvolution approach: data data

  14. Correlation function Deconvolution function Correlation approach: data data Deconvolution approach: data data

  15. Seismic interferometry by deconvolution Downgoing wavefield P+ Upgoing wavefield P- Reflection response R+ target (reservoir) Wapenaar and Verschuur, 1996, Delphi Amundsen, 1999, SEG, Wapenaar et al., 2000, SEG Holvik and Amundsen, 2005, Geophysics Schuster et al., 2006, Geophysics

  16. Seismic interferometry by deconvolution OBC example (1996)

  17. Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions

  18. Deconvolution approach: Correlation approach:

  19. Correlation approach: Deconvolution approach:

  20. Correlation approach: Deconvolution approach:

  21. Correlation approach: Deconvolution approach:

  22. Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions

  23. van der Neut et al., Thursday 14:55 P272

  24. Cross-Correlation PP reflection black = directly modeled red = retrieved

  25. Deconvolution PP reflection black = directly modeled red = retrieved

  26. Cross-Correlation PP reflection directly modeled black = directly modeled red = retrieved retrieved

  27. Deconvolution PP reflection directly modeled black = directly modeled red = retrieved retrieved

  28. Cross-Correlation PS reflection black = directly modeled red = retrieved

  29. Deconvolution PS reflection black = directly modeled red = retrieved

  30. Cross-Correlation PS reflection directly modeled black = directly modeled red = retrieved retrieved

  31. Deconvolution PS reflection directly modeled black = directly modeled red = retrieved retrieved

  32. Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions

  33. USArray

  34. Cross-correlation

  35. Deconvolution

  36. Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions

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  44. t (s) Cross-correlation (a) Correlation

  45. t (s) Deconvolution (b) Deconvolution

  46. Ground Truth: Cross-correlation:

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