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Service: Zero Offset VSP
The unique geometry of a
zero-offset VSP allows for multiples, recorded above the
depth of the deepest receiver, to be identified and
removed. The end result is a zero-phase, primaries-only
dataset. This dataset can be used to identify residual
multiple reflections on the surface seismic data, as well
as to phase and frequency match the surface seismic data
to the zero-phase VSP.
Benefits and Applications
- Improved time-depth
relationship
- True wavelet corridor
stack
- Multiple free corridor
stack
- Identify surface
seismic events as primary reflection or multiple
reflections
- Identify depth at
which seismic event intersects wellbore
- Depth prediction of
seismic events ahead of the drill bit
- Improved vertical
resolution compared to surface seismic data
- Wavelet extraction and
wavelet shaping
- Phase determination
and matching of surface seismic data
- Complex structure and
wellbore deviation to allow for offset imaging with
improved lateral resolution
- Attenuation studies (Q
estimation)
- Extraction of
parameters for enhanced surface seismic processing
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