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Santos Tern-1 Wellhead Abandonment

Activity type Decommissioning, dismantling or removing a facility
Activity subtypes
Submitted by Santos Limited
Submission date 06 July, 2020
Subtype New
Decision date 30 September, 2021
RMS ID 5305
Status Finalised
Outcome Accepted
Link to previously accepted EP
Joe Ariyaratnam
Phone: (08) 9363 9024
Location map (click to enlarge)
Location map - Activity: Santos Tern-1 Wellhead Abandonment (refer to description)

Santos Ltd (Santos) and Bonaparte Gas and Oil Pty Ltd are joint titleholders of petroleum retention lease WA-27-R, in the Bonaparte Basin, approximately 300 km west-southwest of Darwin and approximately 100 km offshore from the Western Australian coast.

The Tern-1 well was drilled in WA-27-R in 1971 targeting potentially commercial gas resources. The well was plugged and abandoned in the same year and now Santos proposes to leave the wellhead permanently in-situ.

The defined petroleum activity for this EP comprises of leaving the wellhead in-situ in perpetuity. No further operations or works are required. No future wellhead surveys or monitoring is planned.

The petroleum activity ends upon acceptance of the EP by National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA), and on submission and acceptance of the notifications as required under Regulation 29 (end of activity) and Regulation 25A (end of EP) of the Offshore Petroleum and Greenhouse Gas Storage (Environment) Regulations 2009 (OPGGS(E)R 2009).

At process end, Santos will have made arrangements satisfactory to NOPSEMA for leaving the wellhead (property) in-situ in perpetuity compliant to Section 270(3)(ii) of the Offshore Petroleum and Greenhouse Gas Storage Act 2006.

Other Details
Locations North West
Commonwealth waters adjacent to Western Australia
Titles (or other instruments) WA-27-R
Current Documents (Finalised)
EP Document

Location map


Previous EP Documents (Under assessment)
EP Document

Location map