Echo Yodel Subsea Decommissioning
|Activity type||Decommissioning, dismantling or removing a pipeline|
|Activity subtypes||Any other petroleum-related activity|
|Submitted by||Woodside Energy Ltd|
|Submission date||17 April, 2020|
|Decision date||24 March, 2022|
|Link to previously accepted EP|
Phone: 08 9348 4000
Woodside Energy Ltd. proposes to remove the Echo Yodel subsea infrastructure within Permit Area WA-9-PL. The ‘Echo Yodel subsea infrastructure’ is defined as:
• a pipeline with pig launcher connected
• an electrohydraulic umbilical (EHU)
• two umbilical termination assemblies (UTAs)
• an infield umbilical termination basket (IUTB)
• infield control jumpers.
The infrastructure is located in Commonwealth waters in the NWS Province, about 140 km north west of Dampier on the coast of Western Australia. The closest landfall is the Montebello Islands, which are approximately 68 km to the south of the Operational Area. The Operational Area is defined as a radius of 1500 m on either side of the pipeline and EHU.
The infrastructure will be removed between 2022 and 2026 by a number of vessels during one or multiple campaigns. The cumulative duration of the activity is two to eight months and is dependent on further engineering assessment, vessel availability and unforeseen circumstances and weather. Once underway, activities will be 24 hours per day, seven days per week.
The pipeline will be recovered via reverse reel lay, reverse S-lay, cut and recover, or a combination of these three methods. The EHU is planned to be recovered onto reels using a heave compensated crane and associated equipment. Deburial and marine growth removal (e.g. water jetting) may be required to enable safe recovery of the infrastructure.