Activity details

Organisation	Woodside Energy Ltd
Project	North West Shelf
Activity types	Other survey
In-force EP	7675
Submission date	15 December, 2023
Outcome	Accepted
Acceptance date	30 May, 2024
Locations	North West
Start date	04 December, 2024
Stop date	20 December, 2024
Lifecycle Classification	Development

Please note: activity start and stop dates are based on notifications provided by the titleholder.

Titleholder contact

Activity Description

Woodside Energy Ltd proposes to conduct a series of geotechnical and geophysical surveys which will collectively form the Petroleum and Greenhouse Gas Activities Program (PGGAP). The PGGAP is proposed to be undertaken to support future activities within multiple title areas, including the Goodwyn A (GWA) infill development, plug and abandonment (P&A) activities at various wells and future exploration activities for greenhouse gas activities and petroleum activities. Woodside plans to collect high resolution geotechnical and geophysical data to inform the design of flowlines and umbilical routes, design of subsea structure foundation locations and planning for mobile offshore drilling unit (MODU) anchoring or jack-up location associated with the GWA infill development, P&A activities and future exploration activities. The PGGAP is located on the Northwest shelf adjacent to Woodside's GWA platform and North Rankin complex, approximately 32 km from the nearest shoreline (Montebello Islands) and approximately 123 km to Dampier on mainland WA. The PGGAP will occur within three Operational Areas (OA) defined as A, B, and C. The area and water depth of each OA ranges between 171 km2 – 1340 km2 and approx. 20 – 190 m, respectively. At least two project vessels will be required to complete the activities associated with the PGGAP. One that is capable of conducting geophysical surveys (such as a multi-purpose project survey vessel) and one to undertake geotechnical surveys (such as a geotechnical drilling vessel). There may also be times where a smaller geotechnical survey vessel is required to undertake surveys along proposed pipeline routes. Geophysical and geotechnical survey(s) within the OA may use the following survey equipment: • Multibeam Echo Sounder • Side Scan Sonar • Magnetometer • Sub Bottom Profiler (SBP) (Boomer/Sparker and/or Chirp) • Box cores/grab sample • Piston/Gravity/Vibro cores • Drilling core holes • Cone Penetrometer Test The PGGAP is anticipated to commence in Q1 2025 and is forecast a total of approximately 18 weeks to complete with vessels operating 24 hours a day. It is possible that the PGGAP will not be undertaken in a single campaign and the approximately 18-week activity may be split over the five-year period of this EP. Timing and duration may be subject to change due to project vessel availability, unforeseen circumstances and weather.

Location map (click to enlarge)

Accepted EP Documents

EP Document	A1081548 (44.6 MB)

Related EP assessments

7675 (Click to view)

7674 (Click to view)

7658 (Click to view)