Method of attenuating sea ice flexure noise during seismic surve

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

1983-10-31

1986-11-04

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

367 15, 367 37, 367 56, G01V 138, G01V 120

Patent

active

046213473

ABSTRACT:
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.RTM.-type data. 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 - surprisingly - 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. He is aided in formulating his exploration strategy by the use of aerial and/or radar photographs or LANDSAT unmanned satellite data for mapping the pressure ridges of the area under survey.

REFERENCES:
patent: 3923121 (1975-12-01), Kruppenbach
patent: 3934220 (1976-01-01), Davis
patent: 4363113 (1982-12-01), Taner et al.
patent: 4461178 (1984-07-01), Chamuel
4th Ann. Nat. Canadian Soc. of Exp. Geophys. Conf., Oilweek, vol. 27, #15, pp.11-13, 5/24/76.
Yu, "A Royleigh Wave Dispersion Technique for Geoexploration", 4/75, pp. 4951-B, Diss. Abst. Int., Sec. B, v. 35, No. 10.

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