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Jansz-Io Compression (Gorgon gas supply)
A subsea-compression scheme keeping one of the world's largest LNG plants (Gorgon) supplied as its field ages — a rare, technically complex subsea-compression build with its own multi-year commissioning tail.
Subsea gas · Australia (Asia-Pacific) · every fact below is as reported by the linked sources, checked by hand on 2026-10-08.
- Size
- Maintains feed-gas supply to Gorgon LNG's three 15.6 MTPA trains via a 27,000-tonne floating field control station and ~6,500 tonnes of subsea compression infrastructure
- Operator / developer
- Chevron Australia (Gorgon joint venture)
- Phase, as reported
- installation / commissioning (Chevron's December 2024 indicative schedule runs installation from late-2024 to mid-2027; commissioning and start-up to commence from 2026/2027)
- Checked on
- 2026-10-08
Phase track steps named in the reported phase are marked
- FID
- Engineering
- Fabrication
- Construction
- Installation
- Commissioning
Who builds it as stated by the sources
- Chevron — operator
- Saipem — contractor, ~$4bn order for the compression project scope
Reported risk as reported, as of 2026-10-08
Schedule has moved: Chevron's December 2024 update extended the installation window from mid-2024–mid-2026 to late-2024–mid-2027, with the compression station installed in two campaigns; no public start-up announcement found as of October 2026.
Key dates as stated by the sources
- Sanctioned
- 2021 (project proceeded)
- Startup target
- Commissioning, start-up and operation expected to commence from 2026/2027 (Chevron operations environment plan, accepted by NOPSEMA 26 March 2026)
Disciplines likely needed our inference
- subsea engineering
- commissioning
- controls/instrumentation
- offshore installation supervision
- HSE
Our inference from project kind and phase — not stated by the sources below.
On the Radar news about this project, each linked to its source
Sources checked on 2026-10-08
- Chevron's Jansz-Io compression project on trackOffshore Magazine · published 2024 · retrieved 2026-09-19
- Saipem wins contract for Chevron's Jansz-Io compression projectLNG Prime · published 2021-2022 · retrieved 2026-09-19
- Gorgon and Jansz Feed Gas Pipeline and Wells Operations (environment plan summary)NOPSEMA (Australian offshore regulator) · published 2024-12 · retrieved 2026-09-22
- Jansz-Io Compression Installation (information sheet, Dec 2024)Chevron Australia · published 2024-12 · retrieved 2026-10-08
Position on our globe: 20.75°S 115.40°E. Location approximate: Jansz-Io gas field / Barrow Island, offshore Western Australia.