Wheatstone Project - Start-Up and Operations
|Activity type||Operation of a facility|
|Activity subtypes||Operation of a petroleum pipeline|
|Submitted by||Chevron Australia Pty Ltd|
|Submission date||17 August, 2021|
|Status||Under assessment (with NOPSEMA)|
|Link to previously accepted EP|
Phone: +61 8 9216 4000
The Wheatstone Liquefied Natural Gas (LNG) Project (the Project) produces hydrocarbon fluids from offshore fields, transports these fluids through flowlines to the Wheatstone platform (the platform) for initial processing, and then transports gas and condensate through the trunkline to the onshore gas plant for further processing. Resultant LNG and condensate are exported by vessels to the international market, and gas is available to the domestic market via a tie-in with the existing Dampier to Bunbury Natural Gas Pipeline.
The activities detailed in this EP will be conducted in Commonwealth Waters, Western Australia (WA) State Waters, and on the WA mainland, thus spanning more than one regulatory jurisdiction. Only those activities that fall within a given jurisdiction are submitted to the respective regulator to meet relevant regulations, as follows:
• the National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA) for acceptance under the Commonwealth Offshore Petroleum and Greenhouse Gas Storage (Environment) Regulations 2009 (OPGGS(E)R)
• the WA Department of Mines, Industry Regulation and Safety (DMIRS) for approval under the Petroleum (Submerged Lands) (Environment) Regulations (PSLER) 2012 (WA), and the Petroleum Pipelines (Environment) Regulations (PPER) 2012 (WA).
Fluid production will be from wells located in the Wheatstone (WA-46-L, WA-47-L, and WA-48-L) and Iago (WA-46-L and WA-48-L) fields located off the Pilbara coast of WA. Additionally, the platform (WA-3-IL) will receive fluids from the Julimar Development Project (JDP) WA-49-L, located south west of WA-48-L, described in the Woodside Energy Julimar Pty Ltd (Woodside) EP.
The offshore section of the trunkline includes a Commonwealth Waters section from the platform to the State Waters boundary (WA-25-PL), and a State Waters section (TPL/25) to the shore crossing through a microtunnel. The trunkline exits the microtunnel and remains buried onshore for approximately 1 km before emerging above ground just before the onshore endpoint located upstream of the gas plant. The trunkline crosses the shore at Ashburton North, which is approximately 12 km south-west of Onslow on the Pilbara Coast, within the Shire of Ashburton, W.A.
This EP addresses Project Start-up and Operations activities associated with the Wheatstone and Iago hydrocarbon system and platform, which comprises the Wheatstone and Iago field wells and associated subsea infrastructure, the platform, and the trunkline from platform to the onshore end point.