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4CScapeSM
multicomponent data calibration |
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4CScapeSM multicomponent data
calibration
VSP technology must, and will, move into the arena of
analyzing the basic physics
and geological importance of multicomponent seismic
imaging.
Bob Hardage, June 2003
As surface-seismic data applications are extended to the
multicomponent arena, a
major problem is in relating the seismic images for P- and
S-wave sections to each
other. Borehole seismic data are typically recorded as a
3- or 4-component dataset.
As such, it is possible to use the multicomponent borehole
seismic data to calibrate the P- and S-wave depth images
in an accurate manner. Most VSPs recorded in the past 20
years have been recorded with 3C data, and as such,
represent a valuable data archive that can be utilized
today for the calibration of multicomponent surface data,
both onshore and offshore.
- P-wave and S-wave
reflectivities are not the same for a given horizon.
- VSP records the full
elastic wavefield.
- P- and S-wave depth-time
relationship is critical for relating P- and S-wave
images.
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Credit: Bob Hardage, Bureau of Economic Geology |
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P-wave
depositional features:
coherency time slice 792 ms
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S-wave depositional
features:
coherency time slice 1968 ms |
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