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SeiScapeSM simultaneous surface and borehole acquisition |
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Using a fleet of
specialized borehole seismic tools supplied by Baker
Atlas, simultaneous surface and borehole seismic studies
can now be designed to fit-for-purpose and performed in an
efficient manner.
Multilevel borehole seismic arrays can be installed,
either on a permanent or temporary basis. |
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Each time a surface shot
is triggered, both the surface receiver array and the
borehole array will record the shot. The borehole
receiver is generally 3C multicomponent and can also be
configured for 4C acquisition. Acquisition Design
Borehole data acquisition allows the surface data to be
monitored for acquisition efficiency. For example, a
major surface-seismic survey in the Middle East was
shown to suffer from design flaws that limited data
quality and acquisition speed. The downhole information
allowed a redesign of the survey parameters that
improved speed of operation by 300%.Repeatability
Downhole monitors can be placed in the same location
with very little variation in coupling or noise issues,
thus ensuring excellent data repeatability over time.
This is a key requirement for time-lapse studies.Once a
downhole trace is recorded for every surface trace, a
number of advanced linked processing techniques become
available, including: |
- Surface-consistent
deconvolution
- Source static determination
- Velocity model refinement
- Processing flow parameterization – zero phasing,
demultiple, Q compensation
- Shear-wave depth-time calibration
- 4D Studies
- AVO, P, P-S and azimuthal analysis
- AVO variation studies
- Anisotropy estimation
- Fracture determination
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