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G01V 1/38 (2006.01) G01V 1/04 (2006.01) G01V 1/20 (2006.01)
Patent
CA 1232349
36 A B S T R A C T IMPROVEMENTS RELATING TO SEISMIC SURVEYING A 3-dimensional seismic survey of subsurface strata produces reflection samples relating to common source- detector midpoints on a rectangular grid in which the lines of the grid in at least one direction are in groups in which the lines are more closely spaced than the nearest lines in adjacent group. The bunching of lines into groups has no effect on the accuracy of the crossline interpolation but enables a group of lines to be surveyed at the same time by a vessel using more than one separate seismic source and/or more than one streamer value of seismic receivers. It is of particular value when the survey has widely spaced lines so that the surveying of two lines of an evenly spaced grid at once would involve an impractically wide separation of the sources or streamer cables.
467529
Kirby Eades Gale Baker
Texas Instruments Incorporated
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