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AnisoScapeSM anisotropy parameter selection |
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Today, the most difficult
part of a typical anisotropic imaging task is the
determination of the processing parameters. Most service
companies, and many oil companies, have software to do the
forward problem (imaging); it is the inverse problem
(determining the parameters) that is difficult.
Leon Thomsen, 2002
The use of anisotropy in surface-seismic depth imaging is
increasing. Anisotropy
parameters are, however, difficult to obtain from surface
data due to limitations
in angular aperture. This limitation can lead to
mispositioning of structural
features and to poor focusing of seismic anomaly
features or faulting.
Borehole seismic data, with a greater angular
aperture, can be used to provide measured and
interval anisotropy parameters at depth. These
parameters and controls can be fed back to the
surface-seismic depth model, and thereby, used
to improve the overall depth image.
- Improved structural imaging
- Better fault focusing
- More accurate pre-drill geopressure estimation
- Improved AVO results
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Without
anisotropy correction |
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With
anisotropy correction |
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