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3C - 3D Vector Migration
results from two-line walkaway and offset-VSP data.
Courtesy of Anadarko
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3D VSP
Processing, Interpretation and Integration |
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Model Update and Validation
After the 3D VSP is acquired, additional information is
available to either corroborate the model or to suggest
changes. First arrival times, as well as reflection
arrival times, contain valuable information that can be
used to provide better velocity and structural resolution
than was previously available before the survey was
acquired.The VS3SM system uses the GeoTomo LLC VELMAP™
program to perform 3D non-linear travel time tomography
and refine the original pre-survey velocity model. |
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Since all of the VS3
modeling software is integrated, this becomes an
efficient process. While the 3D VSP data is being
processed, the travel time data can be read into VELMAP
and 3D travel time tomography used to update the
velocity field around the well. The resulting
high-resolution velocity model will be used for imaging
the 3D VSP data. |
3D VSP Migration
The heart of any 3D VSP processing system is the 3D
migration imaging application. VSFusion offers two
state-of-the-art solutions for 3D VSP migration.
Wave equation migration
has become the industry standard for accurate depth
migration. Its ability to preserve the
shorter-wavelength, higher-resolution seismic
characteristic of 3D VSP data, together with the
potential to resolve very complex structures, make this
technique far superior to standard single-component
Kirchhoff migration. Wave equation migration is very
efficient for 3D VSP geometries where there are
typically few receivers and many sources. VSFusion is
proud to offer the VSP industry the CGGVeritas WaveVista™
anisotropic wave equation migration for 3D VSP imaging. |
Travel-time tomographic
model construction - 2D and 3D |
CGGVeritas Geocluster –
Flexible and Powerful Seismic Processing System
- Rapid turnaround of
large datasets using optimized batch processing flows
- Full suite of analytical tools for
data QC and information extraction
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