The Jansz-Io gas field is part of the wider Chevron-operated Gorgon development, which has been operational since 2016 and delivers natural gas to customers across Asia and Australia. The Gorgon Project is a joint venture between the Australian subsidiaries of Chevron (47.333%), ExxonMobil (25%), Shell (25%), Osaka Gas (1.25%), Tokyo Gas (1%) and JERA (0.417%).
The J-IC project will use subsea compression technology to maintain long-term natural gas supplies to the Gorgon LNG and domestic gas facilities on Barrow Island. As part of this, Nexans will deploy a power and communication transmission system from the shore to the offshore compression facilities, which will sit at a water depth of 1400 m. A 145 kV deepwater dynamic cable will provide power from shore to an offshore floating facility that will subsequently power and control the subsea compression.
Nexans will use its new cable-laying vessel, the Aurora, to install the cables for J-IC. The new vessel is state of the art and its high load, carousel capabilities are specifically designed for laying cables in complex, deepwater deployments like the Jansz-Io field. The 135 km long high voltage subsea power cable will also be manufactured, tested and installed in one continuous length.
“While innovative on its own terms, the high voltage dynamic subsea cables for J-IC will be a major strategic reference and enabler for future projects in floating offshore wind and the electrification of floating offshore facilities,” said Ragnhild Katteland, Nexans’ Executive Vice President Subsea and Land Systems Business Group.
Image courtesy of Nexans.
Read the latest issue of Oilfield Technology in full for free: Issue 3 2021
Oilfield Technology’s third issue of 2021 starts with a report from Wood Mackenzie focusing on the upstream industry’s fortunes in Asia-Pacific. The rest of the issue is dedicated to features covering offshore engineering, coiled tubing, frac technology, completion technologies, water management, well placement and much more.
Exclusive contributions come from Wild Well Control, Cudd Pressure Control, TMK, NOV, Archer, Tendeka, TETRA Technologies and more.
Read the article online at: https://www.oilfieldtechnology.com/offshore-and-subsea/06102021/nexans-to-provide-deepwater-high-voltage-dynamic-cable-for-jansz-io-compression-project/