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GCAcquisition Footprint Removal for Better Fault and Curvature Attributes*
Satinder Chopra1, Kurt J. Marfurt2, and Somanath Misra1
Search and Discovery Article #40719 (2011)
Posted March 18, 2011
*Adapted from the Geophysical Corner column, prepared by the authors, in AAPG Explorer, March, 2011. Editor of Geophysical Corner is Bob A. Hardage ([email protected]). Managing Editor of AAPG Explorer is Vern Stefanic; Larry Nation is Communications Director.
1Arcis Corp., Calgary, Canada ([email protected])
2University of Oklahoma, Norman, Oklahoma
Seismic
attributes are particularly effective for extracting subtle geologic features from relatively noise-free
seismic
data
. However,
seismic
data
are usually contaminated by both random and coherent noise, even when the
data
have been migrated reasonably well and are multiple-free. As you can see here, certain types of noise can be minimized during
interpretation
through careful structure-oriented filtering and post-migration suppression of
data
-acquisition footprints.
Another problem sometimes encountered by interpreters is the relatively low frequency bandwidth of seismic
data
. Although significant efforts are made during
data
processing to enhance frequency content of reflection signals, such efforts often fall short of the objective. Thus suitable ways need to be adopted to achieve improved frequency content of reflection
data
during
data
interpretation
. We discuss both of these problems here – the suppression of acquisition footprints from
seismic
data
, and frequency enhancement of
data
before final
interpretation
is done.
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Suppression of Random Noise Mean filters and median filters are commonly used during Dip-steered mean filters work well on prestack Suppression of Acquisition Footprint An acquisition footprint is defined as any amplitude or phase anomaly observed in One of the simplest methods for suppressing Thin-bed spectral inversion is a process that removes time-variant wavelets from In addition to viewing spectrally broadened Depending on the quality of To illustrate the importance of Notice these coherence slices show increased resolution in this a-b-c-d order of We emphasize that computation of attributes is not a process that involves pressing some buttons on a workstation, but requires careful examination of input In our studies, we find that:
Some of these We wish to thank Arcis Corporation for permission to present these results. |
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