Device and method for determining seismic offset in marine acquisition
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United States of America Patent
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Feb 24, 2015
Grant Date -
May 16, 2013
app pub date -
Jun 11, 2012
filing date -
Nov 10, 2011
priority date (Note) -
In Force
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Abstract
Computing device and method for generating an image of a subsurface. The method calculates an offset shift of measured offsets between a seismic source and plural receivers of a streamer. The method includes receiving seismic data recorded underwater by the plural receivers; selecting two pairs of traces from the plural traces and for each pair, calculating a quantity Y that depends on measured offsets of receivers for which the traces were selected, and a quantity X that depends on travel-times and the measured offsets of the receivers for which the traces were selected; calculating a linear relation Y=aX+b, where “a” is a constant and “b” is related to the offset shift; estimating the offset shift from “b”; correcting the measured offsets of the receivers based on the offset shift; and calculating the image of the subsurface based on the corrected offsets.
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