Stanford Exploration Project Passive Seismic Imaging Passive seismic

Stanford Exploration Project Passive Seismic Imaging Passive seismic imaging Brad Artman 650 723 6007 brad@sep. stanford. edu 1

Stanford Exploration Project • • Passive Seismic Imaging The conjecture Reminds me of imaging Look for energy Beg for data brad@sep. stanford. edu 2

Stanford Exploration Project Passive Seismic Imaging Ambient Noise r 1 r 2 t r 1 r 1 r 2 lag brad@sep. stanford. edu 3

Stanford Exploration Project Passive Seismic Imaging brad@sep. stanford. edu 4

Stanford Exploration Project Passive Seismic Imaging Virtual multiples r 1 r 2 t a r 1*r 1 r 1*r 2 lag b brad@sep. stanford. edu c 5

Stanford Exploration Project • • Passive Seismic Imaging The conjecture Reminds me of imaging Look for energy Beg for data brad@sep. stanford. edu 6

Stanford Exploration Project Passive Seismic Imaging Shot-Profile Migration I z (x)=ΣωUz(w, x, s) Dz (w, x, s) 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

Stanford Exploration Project Passive Seismic Imaging brad@sep. stanford. edu 8

Stanford Exploration Project Passive Seismic Imaging brad@sep. stanford. edu 9

Stanford Exploration Project Passive Seismic Imaging brad@sep. stanford. edu 10

Stanford Exploration Project Passive Seismic Imaging brad@sep. stanford. edu 11

Stanford Exploration Project Passive Seismic Imaging brad@sep. stanford. edu 12

Stanford Exploration Project • • Passive Seismic Imaging The conjecture Reminds me of imaging Look for energy Beg for data brad@sep. stanford. edu 13

Stanford Exploration Project Passive Seismic Imaging Artman Geo. Services brad@sep. stanford. edu 14

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 15

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 16

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 17

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 18

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 19

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 20

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 21

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 22

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 23

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 24

Stanford Exploration Project Passive Seismic Imaging Spectrogram brad@sep. stanford. edu 25

Stanford Exploration Project Passive Seismic Imaging Active data brad@sep. stanford. edu 26

Stanford Exploration Project Passive Seismic Imaging Enlarged data set brad@sep. stanford. edu 27

Stanford Exploration Project Passive Seismic Imaging 5 min Night brad@sep. stanford. edu 28

Stanford Exploration Project Passive Seismic Imaging 5 min Night brad@sep. stanford. edu 29

Stanford Exploration Project Passive Seismic Imaging 10 min Day brad@sep. stanford. edu 30

Stanford Exploration Project Passive Seismic Imaging Random noise brad@sep. stanford. edu 31

Stanford Exploration Project Passive Seismic Imaging Conclusions • • • Need better deconvolution/imaging condition Bad equipment = bad data Electricity is bad Velocity is tough Shorter time series? I think it works! brad@sep. stanford. edu 32

Stanford Exploration Project Passive Seismic Imaging Data • I can collect data anywhere you already are. • Noise tests? Extra time at beg/end of survey? • Time breaks in traces OK. • A velocity model sure would be nice. brad@sep. stanford. edu 33