Method of attenuating sea ice flexure noise during seismic...

Details Method of attenuating sea ice flexure noise during seismic... Method of attenuating sea ice flexure noise during seismic...

G - Physics

10

K

181/11

G10K 11/00 (2006.01) G01V 1/00 (2006.01)

Patent

CA 1221313

ABSTRACT OF THE DISCLOSURE METHOD OF ATTENUATING SEA ICE FLEXURE NOISE DURING SEISMIC SURVEYS OF PERMAFROST REGIONS The present invention indicates that in exploration of permafrost regions of the world for oil and gas accumulations, flexure noise can be attenuated by careful placement of the vibratory source vis-a-vis the receiver array during collection of the Vibroseis ? -type data. It has been surprisingly found that if the explorationist adopts a survey strategy in which the vibratory source is separated from the receiver array by a pressure ridge or its equivalent over the ice formation of the region under survey, then the seismic reflection signals can be easily collected and displayed. Result: continuity of events from onshore reflectors can be easily followed offshore through the transition zone into deeper sea ice regions.

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