Method for deriving 3D output volumes using filters derived from flat spot direction vectors
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United States of America Patent
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Dec 9, 2008
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N/A
app pub date -
Jul 5, 2006
filing date -
Nov 25, 2003
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Abstract
A method of determining the existence of and location of hydrocarbon and water fluid contacts by analyzing spatial changes in 3D seismic data. The method begins by obtaining seismic attribute data as a 3D data volume. Then the method derives 3D dip and azimuth as a 3D volume and deriving corresponding 3D reliability volumes or derives responding 3D censor volumes which are representative of portions of the volume within which a reliable dip and azimuth can be determined. A focused subvolume of interest within the 3D data volume is then selected. The method concludes by storing filtered 3D seismic attribute data within the filter half length in each 3D direction along with null values for all non-reliability locations outside the filter half length but within the focused subvolume of interest forming a 3D output volume.
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