Sercel Inc.

Isabelle Sellin

Mike Maples

John S Hepp

Gaetan Mellier

Simon Leboeuf

Sylvie Menezo

Gaëtan Mellier

John Hepp

It is proposed a method for monitoring an electrical power supply line comprised in a seismic cable and extending along the seismic cable. The seismic cable includes: a plurality of seismic sensors arranged along the seismic cable, a plurality of controllers arranged along the seismic cable, and an optical transmission line extending along the seismic cable for carrying data signals from or towards the controllers. The electrical power supply line supplies at least one pair of master and slave controllers. The master controller of a given pair of master and slave controllers performs a step of monitoring a portion of the electrical power supply line between the master and slave controllers, by using an optical loop established on a portion of the optical transmission line between the master and slave controllers, and starting from the master controller and passing through the slave controller.

Method for monitoring an electrical power supply line comprised in a seismic cable, corresponding system, computer program product and non-transitory computer-readable carrier medium

A streamer for seismic prospection comprising directional sensors (), such as geophones or accelerometers, distributed along the streamer, characterized in that said streamer comprises at least two tilt sensors () located in remote positions and in locations distant from the directional sensors () and means which determined the effective orientation of each directional sensor () by interpolating along the streamer the tilt detected by the two tilt sensors ().

Streamer for seismic prospection comprising tilt compensation of directional sensors

An apparatus and a method for multiplexing and demultiplexing Fiber Optic Interferometric Sensors (FOISs), including means for forming an optical source, at least one sensing cable, at least one wavelength demultiplexing system, and a calibration system.

Fiber optic interferometric sensor array with increased multiplexing density

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Vigneux-de-Bretagne, France

Isabelle Sellin