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Passive seismic imaging

Passive seismic imaging. Brad Artman 650 723 6007 brad@sep.stanford.edu. The conjecture Reminds me of imaging Proof of the matter Synthetics Real data Extra Modes Business case The road ahead. Ambient Noise. r1. r2. r1 r1 r1 r2. t. lag. The conjecture Reminds me of imaging

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Passive seismic imaging

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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

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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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