Sequoia 3D Seismic Survey

ConocoPhillips Australia will undertake a three-dimensional (3D) marine seismic survey (the Sequoia seismic survey) to enable assessment of the natural gas reservoirs in the eastern
offshore Otway Basin ~26 August to 31 October 2021.  24 hours a day.

Vessels Geo Coral (IMO 9492579), Mariska G (IMO 9690250), Northern Star (MMSI 503732800).
Exploration Permit T/49P west of King Island (see the attachment for a detailed map at figure 1 on page 3).

Safe Marine Operations Protocols
ConocoPhillips Australia will undertake a three-dimensional (3D) marine seismic survey (the Sequoia seismic survey) to enable assessment of the natural gas reservoirs in the eastern
offshore Otway Basin.  In line with the accepted environmental plan, the following Safe Marine Operations Protocols will be implemented to ensure the safety of all marine users during the survey.
Summary of activity
Survey Location
Exploration Permit T/49P is approximately 23.5 km west of King Island at its closest point. The survey operational area is approximately 4090 km2. This area allows for vessel turning and operations throughout the seismic acquisition. The survey acquisition area is approximately 2450km2 and is the area over which seismic will be acquired. For a detailed map see
figure 2 on page 3.
Pre-survey deployment
It is anticipated the seismic vessel (Geo Coral) will be in the region from 18 August 2021 to ensure equipment needed for the survey is operational. The seismic vessel (Geo Coral) will undertake pre deployment activities where the seismic array (streamers and acoustic source) will be placed in the water (see figure 1). During this time the acoustic source will not be activated. To ensure the safety of the personnel deploying the equipment this pre deployment may occur to the east of King Island depending on sea state. Once the seismic array is in the water an exclusion zone around the vessel is in place.
Safe Operations Protocols
The seismic survey vessel (Geo Coral) contracted by ConocoPhillips Australia for the Sequoia 3D marine seismic survey will operate in accordance with Australia Maritime Standards, regulated by the Australian Maritime Safety Authority (AMSA).
Communication with other vessels and marine users will occur using standard maritime protocols.
Notifications
• Notifications to AMSA will be issued by the vessel contractor 14 days prior to survey commencement or on EP approval and at survey completion.
• Notice to mariners will be issued by the Australian Hydrographic Office.
• Any potentially impacted marine users will be provided with a daily, 48 hour operational look ahead that includes specific locations and timings. This information will be sent via email from the vessel contractor on behalf of ConocoPhillips Australia. If you would like to receive this daily email, simply phone or email ConocoPhillips Australia.

2021-sequoia-exclusion-zone
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