Bureau of Resources and Energy Economics

Petrel Sub-basin

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Release Area – W14-1

Work program bids close 2 April 2015


  • Proximal to the Blacktip, Petrel, Tern, Frigate and Prometheus/Rubicon gas accumulations
  • Proximal to the Blacktip pipeline and the nearly completed Ichthys pipeline
  • Shallow water depths, ~50 m
  • Proven plays in anticlines, tilted fault blocks and structural/stratigraphic traps
  • Multiple potential oil- and gas-prone source rocks and active petroleum systems in the region
  • Special Notices apply, refer to Guidance Notes

Release Area W14-1 is located in the Joseph Bonaparte Gulf, less than 20 km offshore, and approximately 400 km from Darwin. Area W14-1 is in the vicinity of the Petrel, Tern, Frigate, Blacktip and Prometheus/Rubicon gas accumulations. The Blacktip field commenced production via the Blacktip pipeline in 2009.

Release Area W14-1 straddles the western Petrel Sub-basin and the eastern Londonderry High in the southern Bonaparte Basin. The Torrens 1 well, with both oil and gas shows, is within the Release Area. Proven Permian petroleum systems in the region have charged numerous gas accumulations. There is also a known oil- and gas-prone lower Carboniferous petroleum system in the southern Petrel Sub-basin, with Bonaparte Formation (Langfield Group equivalent) and Tanmurra Formation (Weaber Group) source rocks. Sufficient deep drilling has not been undertaken in the western Petrel Sub-basin to fully evaluate the western extent of this older petroleum system, although Marina 1 and Lesueur 1 both had gas and oil shows in the Carboniferous–lower Permian succession close to the Release Area. The Release Area offers a range of play types including horst blocks and rotated fault blocks, as well as inversion-related anticlines. Stratigraphic traps are represented by pinch-outs and truncations across unconformities. Infrastructure in the region is expanding and will facilitate development of any new discovery.

Related documents
Document Title PDF Other Format
Release Area Map – Petrel Sub-basin PDF JPG
Geology – Petrel Sub-basin PDF DOC
Data Listing – Petrel Sub-basin   XLS
Block Listing and Block Diagram – Petrel Sub-basin PDF DOC
Regional Geology – Bonaparte Basin PDF DOC
Bidding for an exploration permit   DOC
2014 Special Notices   DOC

Note: Due to the complexity of these figures no alternative descriptions have been provided.
Please email Geoscience Australia at feedback@ga.gov.au for alternate descriptions.