Offshore Appraisal Well

The CarbonNet Project successfully completed drilling an Offshore Appraisal Well (OAW) on 24 January 2020 at the Pelican site in Bass Strait.

The aim of the drilling program was to confirm that identified rock structures deep under the seabed can permanently store carbon dioxide (CO2), thereby validating our previously collected data.

An extensive dataset was successfully acquired during the operation, including:

  • geological formation rock
  • fluid samples
  • high-quality wireline formation logs.

During 2020 the rock samples will be analysed in laboratories to confirm their detailed composition, physical properties including porosity, permeability and their strength and chemical resistance to CO2. Along with the data acquired from the 2018 marine seismic survey, the well data will be used to model and assess the suitability of the site for long-term storage of CO2.

OAW Environment Plan

The Environment Plan for this activity was approved by the regulator, National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA), in April 2019.

View the Environment Plan Summary on the NOPSEMA website.

Drilling operations

The CarbonNet project reached an important milestone in November 2019 with our drilling rig, the Noble Tom Prosser, arriving in Melbourne's Port Phillip Bay onboard the OHT Osprey (heavy lift vessel).

You can view our video which shows the drilling rig being 'floated off' from the Osprey, prior to being towed out of the Bay towards its final destination - CarbonNet's Pelican site in Bass Strait, arriving on 1 December 2019.

The CarbonNet project has reached an important milestone with our drilling rig, the Noble Tom Prosser, having arrived in Melbourne's Port Phillip Bay on 27 November onboard the OHT Osprey (heavy lift vessel).

Our video shows the drilling rig being 'floated off' from the Osprey, prior to being  towed out of the Bay towards its final destination - CarbonNet's Pelican site in Bass Strait (arrived 1 December).

Once onsite, the rig was positioned approximately 8km offshore from the Ninety Mile Beach in Bass Strait from December 2019 to January 2020. The rig drilled to a depth of about 1.5km below the seabed in order to extract approximately 90m of core sample for analysis purposes.

Diagram of a typical offshore jack-up drilling rig. The total depth of the appraisal well is 1,500 metres.


A 500m radius safety exclusion zone was in place around the drilling rig for the duration of operations.

The activity was managed by AGR (Australia) Pty Ltd as the Drilling Management Contractor for CarbonNet.

Our video shows the drilling activity onboard the Noble Tom Prosser.

[Insert drilling time-lapse video]

Location

The OAW location was the Pelican site, approximately 8km offshore from the Ninety Mile Beach in Bass Strait, as shown on the map below.

CarbonNet's Offshore Appraisal Well near Golden Beach and Paradise Beach, approximately 8 km offshore in Commonwealth waters

Timeframe

Drilling operations took approximately 55 days to complete over December 2019 and January 2020.

More information

Page last updated: 26 Nov 2020