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Activity - Sasanof-1 Exploration Drilling

Activity details
Organisation Western Gas (519 P) Pty Ltd
Activity types Drilling
In-force EP 5644
Submission date 01 July, 2021
Outcome Accepted
Acceptance date 16 December, 2021
Locations North West
Start date 17 May, 2022
Stop date 12 June, 2022
Lifecycle Classification Exploration
Please note: activity start and stop dates are based on notifications provided by the titleholder.

Titleholder contact
Richard Barker
Phone: 0863232311

Activity Description
Western Gas (519 P) Pty Ltd plans to drill the Sasanof-1 exploration well in Exploration Permit WA-519-P, located in Commonwealth waters in the Carnarvon Basin offshore from Western Australia. The target hydrocarbon prospect is a light Group I condensate.

Drilling is planned to commence at the earliest in Q1 2022 and could occur any time between Q1 2022 and Q4 2023, subject to approvals, vessel availability and weather constraints. Drilling activity are expected to take approximately 25 days. The Sasanof-1 location is about 156 km north of North West Cape (Exmouth area) and 207 km northwest of Onslow. Approximate water depth at the drilling location is 1,070 m.

The Sasanof-1 well will be drilled using a semi-submersible mobile offshore drilling unit (MODU), which will be anchored to the seabed or, depending on rig availability, a dynamically positioned MODU may be used as an alternative. Activity support vessels will include general supply/support vessels and anchor handling vessel(s). The activity will also be supported by helicopter operations, primarily for passenger transfers/crew changes and minor supplies, but may also be used in the event of an emergency evacuation. Remotely operated vehicles will also be used.

For the duration of drilling activities a 500 m temporary Petroleum Safety Zone will be in place around the MODU and a 5 km radius temporary Operational Area (Cautionary Area) will be in place around the well location. Drilling activities will be undertaken 24 hours per day, 7 days per week.
Location map (click to enlarge)
Location map - Activity: Sasanof-1 Exploration Drilling (refer to description)

Accepted EP Documents

EP Document A815268 (21.3 MB)
OPEP Document A815271 (2.32 MB)
OSMP Document A815267 (1.8 MB)
NOPSEMA Report A800121 (161 KB)

Related EP assessments

5644 (Click to view)