Geophysical data acquisition system

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting

Reexamination Certificate

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Details

C367S141000, C181S111000

Reexamination Certificate

active

07453763

ABSTRACT:
The invention includes a geographical sensor apparatus for use under water in the sea, including a plurality of seismic sensors (1) for sensing seismic waves associated with underground formations, and a plurality of EM-sensors constituted preferably by electrodes (4) for sensing electromagnetic waves associated with the underground formations. In a preferred receiver cable configuration embodiment of the invention, the geophysical sensor apparatus includes a seismic receiver cable with a linear array of a plurality of seismic sensors (1) and EM-sensors arranged inside a flexible outer skin (25), with the EM-sensors having electrodes on the outside of the outer skin. The cable is operated on the seafloor by a surface vessel, the vessel towing an electromagnetic transmitter antenna in addition to the seismic source.

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