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Passive Seismic Imaging: Advancing Seismic Exploration

Explore the fascinating world of passive seismic imaging with Brad Artman. Learn about ambient noise analysis, shot-profile migration, datuming techniques, and more. Discover innovative ways to extract valuable subsurface information and optimize your business strategies.

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Passive Seismic Imaging: Advancing Seismic Exploration

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  1. Passive seismic imaging Brad Artman 650 723 6007 brad@sep.stanford.edu brad@sep.stanford.edu

  2. The conjecture • Reminds me of imaging • Proof of the matter • Synthetics • Real data • Extra Modes • Business case • The road ahead brad@sep.stanford.edu

  3. Ambient Noise r1 r2 r1 r1 r1 r2 t lag brad@sep.stanford.edu

  4. brad@sep.stanford.edu

  5. The conjecture • Reminds me of imaging • Proof of the matter • Synthetics • Real data • Extra Modes • Business case • The road ahead brad@sep.stanford.edu

  6. I (x)=ΣU(w,x,s) D(w,x,s) z z z ω Shot-Profile Migration Realization: If D = U , correlation requirement of the passive seismic conjecture is fulfilled in the migration. Let the wave equation handle the unknown source. brad@sep.stanford.edu

  7. The conjecture • Reminds me of imaging • Proof of the matter • Synthetics • Real data • Business case • The road ahead brad@sep.stanford.edu

  8. R j R j+1 Flow model D T T U j j j j D T T U j+1 j+1 j+1 j+1 brad@sep.stanford.edu

  9. R = U D R = R e R = U D e R = U D e = U e (D e ) * 0 0 0 +i Kz Dz 1 0 +i Kz Dz * 1 0 0 +i Kz(U) Dz + i Kz(D) Dz * 1 0 0 +i Kz(U) Dz -i Kz(D) Dz * 0 0 Shot-profile datuming analogy brad@sep.stanford.edu

  10. Delft datuming brad@sep.stanford.edu

  11. The conjecture • Reminds me of imaging • Proof of the matter • Synthetics • Real data • Extra Modes • Business case • The road ahead brad@sep.stanford.edu

  12. brad@sep.stanford.edu

  13. brad@sep.stanford.edu

  14. brad@sep.stanford.edu

  15. brad@sep.stanford.edu

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  17. brad@sep.stanford.edu

  18. The conjecture • Reminds me of imaging • Proof of the matter • Synthetics • Real data • Extra Modes • Business case • The road ahead brad@sep.stanford.edu

  19. Artman GeoServices brad@sep.stanford.edu

  20. Spectrogram brad@sep.stanford.edu

  21. Active data brad@sep.stanford.edu

  22. Enlarged data set brad@sep.stanford.edu

  23. 5min Night brad@sep.stanford.edu

  24. 5min Night brad@sep.stanford.edu

  25. 10min Day brad@sep.stanford.edu

  26. Crustal scale progress brad@sep.stanford.edu

  27. The conjecture • Reminds me of imaging • Proof of the matter • Synthetics • Real data • Extra Modes • Business case • The road ahead brad@sep.stanford.edu

  28. Forward Scattering brad@sep.stanford.edu

  29. Converted transmission imaging V (x, z) and V (x, z) p s * Forward-scattered P to S mode conversion brad@sep.stanford.edu

  30. Possibilities brad@sep.stanford.edu

  31. Business Case • It’s free and convenient • Provide information to trigger active survey • Low frequency images • including deep crustal information brad@sep.stanford.edu

  32. Novel Aspects of LoFS • Hydrophone w/ absolute pressure • Tide and wave-height monitoring at rig • Drill/operations noise (SWD) • 3-component geophones • vector imaging condition anyone? brad@sep.stanford.edu

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