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Sdr Provide Subsea Visualisation At Frigg

Created on 16 December 2008 by host

SRD, part of the Westhill based Tritech Group, has successfully completed an acoustic subsea visualisation programme in support of decommissioning work on the Frigg field, located on the boundary between the British and Norwegian sectors of the North Sea.

In August this year SRD were contracted by Saipem UK's Sonsub Division on behalf of Total Exploration & Production to provide acoustic subsea visualisation support.

Bathymetry survey of the whole field area, along with debris location.

The operation involved the removal and disposal of pipelines within a 500 metre radius of the platforms and was conducted from the vessel Normand Cutter. There was also a requirement to smooth the original protective rock berms to remove hazards for subsequent trawling activities. SRD's Subsea Visualisation System (SVS) provided real time monitoring of the smoothing operation and was used for rapid assessment of the dispersal of material.

A pair of 240kHz SVS sonar heads was used along with integrated heading, motion and depth sensors. Seabed data was acquired in water depths of 100m using both conventional multibeam and electronic transmit beam-steering techniques.