Chevron Australia and its joint venture partners received regulatory approval for Stage 2 development of Gorgon and Jansz-Io gas-condensate fields offshore northwest Western Australia. Work is expected to begin immediately.
Plans include expansion of the subsea gathering network within the existing field infrastructure. Work includes installation of infield flowlines, pipelines, and umbilicals, as well as installation of subsea structures, jumpers, tie-in spools, and flying leads. This will be followed by leak testing, pre-commissioning, inspection, as well as any required maintenance and repair. Some infill drilling is included.
Stage 2 work is being done to ensure continuation of gas delivery to the three-train, 15.6 million tpy LNG plant and 300 terajoules/day domestic gas plant on Barrow Island. (OGJ Online, Mar. 14, 2019).
Jansz-Io fields lies within production licences WA-36-L, WA-39-L, and WA-40-L about 200 km off the coast in water depths of about 1,350 m.
Gorgon field lies within production licences WA-37-L and WA-38-L about 130 km off the coast in 200 m of water.
Subsea infrastructure for Stage 2 lies in pipeline licences WA-19-PL and WA-20-PL.
