Project · Subsea gas · Australia

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.

Checked by hand against the sources below (2026-10-20).

  1. Engineering (done)
  2. Fabrication (done)
  3. Transport & installation (now)
  4. Hook-up
  5. Commissioning (now)
  6. Operation (next)

Now Transport & installation · Commissioning (reported: installation / commissioning (Chevron's December 2024 indicative schedule runs installation from late-2024 to mid-2027; commissioning and…)

Next Operation · commissioning, start-up and operation expected to commence from 2026/2027, as reported

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Who works on it as the sources name them

  • SaipemTransport & installationOffshore transportation and installation contractor for Jansz-Io Compression; individual Jansz-Io contract value not disclosed in Saipem’s release.
Kind
Subsea gas
Country
Australia
Size
Maintains feed-gas supply to Gorgon LNG: three trains with a combined design capacity of 15.6 million tonnes per year.
Operator
Chevron
Position
20.75°S 115.40°E, approximate

Sources

  1. Chevron's Jansz-Io compression project on trackOffshore Magazine · published 2024 · read 2026-09-19
  2. Saipem wins contract for Chevron's Jansz-Io compression projectLNG Prime · published 2021-2022 · read 2026-09-19
  3. Gorgon and Jansz Feed Gas Pipeline and Wells Operations (environment plan summary)NOPSEMA (Australian offshore regulator) · read 2026-10-20
  4. Jansz-Io Compression Installation (information sheet, Dec 2024)Chevron Australia · published 2024-12 · read 2026-10-08
  5. Chevron Corporation 2023 Form 10-K (filed 26 February 2024)Chevron · published 2024-02-26 · read 2026-10-20
  6. Saipem: two new offshore transportation and installation contracts awarded for a total amount of over 600 million USDSaipem · published 2021-11-15 · read 2026-10-20