Echo Yodel and Capella Plugging for Abandonment
|Submitted by||Woodside Energy Ltd|
|Submission date||24 December, 2020|
|Status||Under assessment (with NOPSEMA)|
|Link to previously accepted EP|
Phone: 08 9348 4000
Woodside Energy Ltd proposes to perform the following activities within Permit Areas WA-1-L and WA-23-L:
• Permanently plug for abandonment the Yodel-3 and Yodel-4 production wells, and the Capella-1 exploration well. Permanent plugging will involve removing temporary plugs and installing permanent abandonment barriers in the wells using a Mobile Offshore Drilling Unit (MODU). Well infrastructure will then be temporarily left in-situ until a permanent decommissioning Environment Plan (EP) has been accepted by NOPSEMA.
The plugging activity in this EP was originally submitted to NOPSEMA as part of the Echo Yodel and Capella Plugging and Echo Yodel Decommissioning (RMS ID: 5222). Woodside subsequently decided to remove the plugging from RMS 5222 and transfer it to this new EP.
The proposed Petroleum Activities Program is scheduled to occur between the first quarter of 2021 and fourth quarter of 2023. Permanent plugging activities for the three wells is expected to take about 20 to 60 days per well to complete. If performed as a single campaign, the cumulative duration could be up to 180 days (including mobilisation and demobilisation).
The Operational Area is located in Commonwealth waters within the NWS Province, as defined under the Integrated Marine and Coastal Regionalisation of Australia (IMCRA v4.0), in water depths of about 134 m to 136 m. The Petroleum Activities Program does not overlap with any established or proposed marine protected areas. The closest nearshore sensitive habitats to the Petroleum Activities Program is the Commonwealth boundary of the Montebello Australian Marine Park approximately 24 km to the south. Other sensitive habitats in proximity to the Petroleum Activities Program include Rankin Bank (12 km away from the defined Operational Area) and the Ancient Coastline at 125 m depth contour Key Ecological Feature which overlaps the Operational Area.