JANSZ-IO Compression Project

Type of project: Mining Infrastructure (Cables)

Client: Chevron
Location: Barrow Island, Western Australia, Australia
Completed in: 2025

The JANSZ-IO Project is a life extension activity, providing compression to the JANSZ-IO gas field to maximise recovery from the reservoir and maintain plateau supply to the Gorgon LNG plant. The JANSZ-IO field is located approximately 130 km north-west of Barrow Island in Western Australia in water depths of approximately 1350 m.

Spiecapag has been contracted to install, by way of Horizontal Directional Drilling, two 540m shore approaches consisting of DN630 HDPE to house umbilical cables, including two onshore trenches to facilitate umbilical pull-in and cut-over to existing infrastructure.

The project scope also includes civil works on the North-West of Barrow Island to construct the HDD pad, lay-down area, seawall, anchorage and seawater supply for drilling; onshore trenching and excavation, installation of pre-cast concrete and assisting with umbilical pull-in; as well as rehabilitation works/reinstatement.