Print this page"Super 2D," Innovative 
Seismic
Reprocessing: A Case History
Dennis Conne, Keith Matthews, Addison G. Bolander, Richard Jon MacDonald, David M. Strelioff
The "Super 2D" processing sequence involves taking a randomly oriented grid
of multivintage two-dimensional seismic data and reprocessing to tie the date
where required, then interpolating the data set to a regular grid suitable for
three-dimensional processing and interpretation. A data set from Alberta,
provided by a Canadian oil company, comprises 15 two-dimensional seismic lines
collected and processed over a period of 6 years by various contractors. Field
conditions, advances in technology, and changing objectives combined to result
in a data set that densely sampled a small area, but did not tie in well enough
to be interpreted as a whole. The data mistied in time, phase, and frequency, as
well as having a problem with multiples in the zone of interest that had been
partly attenuated in varying degrees. Therefore, the first objective of
reprocessing was to resolve these problems. Our current land data processing
sequence, which includes frequency balancing followed by source wavelet
designature, F/K multiple attenuation, trim statics, and F-X filtering, as well
as close attention to statics and velocity control, resolved all the mistie
issues and produced a standardized data volume. This data volume was now
suitable for the second stage of this sequence (i.e., interpolating to a regular
grid and subsequent three-dimensional processing). The volume was
three-dimensionally migrated (finite difference), filtered, and scaled. The full
range of three-dimensional display and interpretational options, including
loading on an interactive system, are now possible. This, along with
standardizing the data
set and improving the spatial location of events via
three-dimensional migration are the key results of the "Super 2D" sequence.
AAPG Search and Discovery Article #91030©1988 AAPG Annual Convention, Houston, Texas, 20-23 March 1988.