Method for conducting seismic surveys in waters covered with ice

Details Method for conducting seismic surveys in waters covered with ice Method for conducting seismic surveys in waters covered with ice

1991-02-15

1992-05-12

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

367 16, G01V 138

Patent

active

051133768

ABSTRACT:
In seismic surveys in waters covered with ice, where seismic impulses are actuated under water and reflected signals are detected by a streamer cable (2) towed behind a vessel (1), in order to avoid the source of noise located outside the seismic system due to the icebreaking operation of the vessel (1) the vessel (1) is stopped during active survey and the streamer cable (3) is hauled in with a speed corresponding to the desired propulsion speed of the cable during detection. After detection the vessel again resumes ordinary operational speed and the streamer is paid out with a speed which maintains the desired advancing speed of the system.

REFERENCES:
patent: 3281767 (1966-10-01), Cryer
patent: 3286225 (1966-11-01), Huckabay et al.
patent: 4314363 (1982-02-01), Thigpen et al.

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