Method of seismic surveying, a marine vibrator arrangement, and a method of calculating the depths of seismic sources
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United States of America Patent
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Aug 14, 2007
Grant Date -
N/A
app pub date -
Aug 22, 2000
filing date -
Sep 2, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of seismic surveying comprises emitting seismic energy at two or more different depths during a sweep. In one embodiment, the depth of a seismic source is varied during a sweep, by raising or lower the source while it is emitting seismic energy. In another embodiment, an array of two or more marine vibrators is used as the source of seismic energy, with the vibrators in the array being disposed at different depths. The invention allows notch frequencies in the amplitude spectrum to be eliminated, and allows improvements in both the spectral flatness and the amplitude at low frequencies.
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