Green light for wellhead removal ops at Australian oil field
What happened
NOPSEMA approved Jadestone’s environmental plan to remove three Montara wellheads and specified ROV surveys and preparatory work. The plan anticipates short on‑site durations per well but allows extended mobilisation windows to account for marine and logistical constraints. Expect vessel selection, port reception and disposal arrangements to surface as the next procurement constraints
Buyer takeaway
This is an actionable decommissioning scope; lock vessel slots, port reception and disposal terms now because these are primary cost and schedule drivers
Cost / money
Concentrated vessel hire and disposal logistics make mobilisation and waste‑management pass‑throughs the biggest near‑term cost drivers for this project
Supplier / commercial
Suppliers can ask for mobilisation deposits, minimum hire days, and explicit disposal pass‑through clauses once dates firm; include these in bid evaluations
Safety / operations
ROV surveys, marine growth removal and seabed prep add HSE interfaces; define joint HSE procedures between operator and contractor before mobilisation
What to watch
Watch for slot conflicts at regional ports and waste facilities; competing projects could force longer vessel hire and higher pass‑throughs
Key facts
- Wellhead work scoped with approx. 2 days activity per well and a 14‑day mobilisation allowance
- One vessel required to recover subsea infrastructure to deck
- Dismantling and disposal to be completed within 12 months of port arrival
Source excerpts
The EP underlines that the wellhead removal will be subject to the availability of a suitable vessel, and whenever feasible, will be a vessel of opportunity mobilizing to the Montara field for other activities
One vessel is required to complete this activity with the capacity to recover the subsea infrastructure to the deck. The dismantling and disposal of the wellheads is anticipated to be completed within 12 months of arrival at the receiving port and waste management facility
The accepted EP, which provides for the removal of Montara-1, 2, and 3 wellheads, includes remote operated vehicle (ROV) activities such as ‘as found’ and ‘as left’ surveys, marine growth removal, and wellhead area preparation
