Banner image

Activity - Santos Tern-1 Wellhead Abandonment

Activity details
Organisation Santos Limited
Activity types Decommissioning, dismantling or removing a facility
In-force EP 5305
Submission date 06 July, 2020
Outcome Accepted
Acceptance date 30 September, 2021
Locations North West
Start date Pending titleholder notification
Stop date Pending titleholder notification
Please note: activity start and stop dates are based on notifications provided by the titleholder.

Titleholder contact
Joe Ariyaratnam
Phone: (08) 9363 9024

Activity 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.
Location map (click to enlarge)
Location map - Activity: Santos Tern-1 Wellhead Abandonment (refer to description)

Accepted EP Documents

EP Document A800346 (7.3 MB)
NOPSEMA Report A803803 (203 KB)

Related EP assessments

5305 (Click to view)