Sonardyne’s Fusion 6G tech for Moho Nord (Congo)

Sonardyne International Ltd. has been awarded a multi-million pound contract by UTEC, an Acteon company, to supply Fusion 6G acoustic positioning technology for the Moho Nord subsea project situated 75 kilometres off the coast of Congo.

The equipment will be used to support the installation of 230 kilometres of rigid pipeline, 23 kilometres of flexible pipes, 50 kilometres of umbilicals and numerous manifolds, plus over 50 subsea structures and rigid jumpers.

The project’s construction phase will run for the next two years with Technip’s rigid pipe S-lay and heavy-lift construction vessel, G1200, and multi-purpose deepwater vessel, Deep Pioneer, being utilised as the primary installation vessels. According to Sonardyne, first oil is expected during 2015, rising to an estimated 140,000 barrels of oil per day by 2017.

Fusion 6G is the industry standard tool for subsea construction and survey, specified for its versatility, ease of use and low risk, Sonardyne said. The LBL equipment being supplied to UTEC includes high specification Compatt 6 seabed transponders, ROV-mounted transceivers, associated topside hardware and software.

The Compatt 6s will be employed to create a wide area subsea positioning network within which multiple vessels and ROVs, often working simultaneously in the field, will be tracked. Tasks will include pipeline touch down monitoring, mattress installation and jumper metrology in water depths ranging from 650 metres to 1,100 metres.

Oilfield construction requires accurate and precise positioning, a requirement that, Sonardyne says, is met by the digital Wideband 2 signal architecture found exclusively within 6G products. The technology is proven to offer robust acoustic performance in challenging conditions, fast baseline measurements, improved multipath rejection around structures and real-time range diagnostics for quality control. With the availability of over 500 unique operating channels, the risk of interference from adjacent acoustic positioning operations is minimised.

Crawford Tennant, UTEC Regional Manager, EMEA said, “Sonardyne and UTEC have partnered together on a number of successful projects and we value this relationship.”

Announcing the order, Sonardyne’s Vice President of Europe and Africa, Barry Cairns said, “Moho Nord joins a premier list of deep water field developments that are benefiting from the technical and commercial advantages offered by 6G. UTEC and their project partners have chosen to invest in the best available subsea positioning technology, technology that will add significant value during the entire life of the Moho Nord project.”

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