Chevron to proceed with $ 4 billion Jansz-Io subsea compression project

Chevron ad that its wholly owned subsidiary Chevron Australia Pty Ltd. (Chevron Australia) as operator and the participants in the Gorgon joint venture will carry out the Jansz-Io Compression (J-IC) project of approximately $ 4 billion (AU $ 6 billion).

Jansz-Io will be the first gas field outside Norway where subsea compression technology will be used. It is located approximately 200 kilometers off the northwest coast of Australia at a water depth of approximately 1,350 meters (4,429 feet).

The goal of Project J-IC is to unlock low pressure reserves from the Jansz-Io Reservoir and maintain plateau production rates at the Gorgon Project facilities on Barrow Island (BWI).

A modification of the existing development of Gorgon, J-IC will involve the construction and installation of a 27,000 tonne normally unattended floating Field Control Station (FCS), approximately 6500 tonnes of compression infrastructure under -marine and a 135 km submarine electric cable connected to Barrow Island.


Construction and installation activities are expected to last approximately five years.

Nigel Hearne, president of Chevron Eurasia Pacific Exploration and Production, said J-IC represents Chevron’s largest capital investment in Australia since the Gorgon Stage 2 project was sanctioned in 2018.

Using advanced subsea compression technology, J-IC is positioned to maintain gas supply from the Jansz-Io field to the three existing LNG trains and to the domestic gas plant on Barrow Island. This will maintain an important source of clean-burning natural gas for customers, enabling energy transitions in countries in the Asia-Pacific region.

—Nigel Hearne

J-IC is following the Gorgon Stage 2 project, whose installation phase is almost complete, to supply gas to the Gorgon plant from four new Jansz-Io wells and seven new Gorgon wells.

The Chevron-operated 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%).

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