Acoustic emission system for seismic surveying at sea

Details Acoustic emission system for seismic surveying at sea Acoustic emission system for seismic surveying at sea

1992-10-16

1994-06-07

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

367 19, 367144, 181120, G01V 138

Patent

active

053196090

ABSTRACT:
An acoustic emission system for seismic surveying at sea, for the purpose of emitting a soundwave in a given direction, the system comprising firstly a plurality of immersed sources mechanically connected to at least one float means and secondly a control circuit for controlling said sources and comprising a plurality of delay means suitable for applying respective phase delays to each of the sources, said delays being defined by a nominal phase law associated with said given emission direction. According to the invention, the system also includes at least two attitude sensors providing signals representative of the absolute position of at least two of said sources to correction means of said control circuit, said correction means providing each of said delay means with a signal for correcting the nominal phase law and representative of variations in the relative positions of the sources. This system has application to geological prospecting by seismic surveying at sea.

REFERENCES:
patent: 4146870 (1979-03-01), Ruehle
patent: 4908801 (1990-03-01), Bell et al.

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