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Vesta 1 and 2 Well Head Abandonment

Activity type Any other petroleum-related activity
Activity subtypes
Submitted by Eni Australia Limited
Submission date 05 April, 2017
Subtype New
Decision date 30 May, 2017
RMS ID 3977
Status Finalised
Outcome Accepted
Link to previously accepted EP

Mr Tom Coolican
Deputy Operations Manager and Production Manager
Eni Australia Limited
Eni House
226 Adelaide Terrace
Telephone: +61 8 9320 2639

Location map (click to enlarge)
Location map - Activity: Vesta 1 and 2 Well Head Abandonment (refer to description)

Vesta-1 and Vesta-2 wells (Vesta-1 & 2) were drilled by Eni Australia Limited (Eni) as part of exploration activity in Permit Area AC/P 21 in 2005 and 2007 respectively.  The AC/P 21 Permit Area is in Commonwealth waters off the north western Australian coast, about 151 km to the east of Ashmore Reef and Cartier Island and approximately 687 km west-northwest of Darwin.  Following drilling and associated testing, the two wells were plugged and abandoned with the well heads left in place. The two Vesta wells are located in slightly over 100 metres (m) of water depth, with the well heads originally extending approximately 3-4m above the surrounding seabed. The wells have remained undisturbed since the original drilling campaigns and it is anticipated the well heads will now be covered by marine growth.The abandonment measures that were put in place for the wells have been reviewed and assessed by the National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA) as meeting the requirements for permanent abandonment, consistent with regulation 5.17(c) of the Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011. An End of Well Abandonment Report (EOWAR) and Well Operations Management Plan (WOMP) describing the abandonment of the wells were submitted to NOPSEMA, and on 28 September 2016 NOPSEMA advised Eni they were reasonably satisfied that the process of abandoning the wells had been undertaken in accordance with the WOMP.The Activity involves permanent (in perpetuity) abandonment of the Vesta-1 & 2 wells.  As the ongoing integrity of the wells has been assured by the previous WOMP activities, no further operations are proposed in relation to the Vesta-1 & 2 wells, including well heads, which will be abandoned in situ.

Other Details
Locations Ashmore Cartier, Northern Territory
Commonwealth waters adjacent to ACI , Northern Territory
Titles (or other instruments) AC/P21
Current Documents (Finalised)
EP Document

Decision notifications

Location map