Offshore Petroleum Exploration Acreage Release 2013

Barcoo Sub-basin

Location of the 2013 Release Areas W13-4 and W13-5 in the Barcoo Sub-basin of the Browse basin.

Release Areas – W13-4 and W13-5

Bids close – 22 May 2014


  • Under-explored areas of untested Permo-Triassic tilted fault blocks and Cretaceous onlap plays
  • Thick Lower–Middle Jurassic section with source potential
  • Widespread minor oil and gas shows, small gas accumulation on Leveque Shelf at Psepotus 1, and inferred gas column at Arquebus 1ST1
  • Good seismic coverage, including multiple regional seismic grids and 3D seismic survey
  • Shallow to deep water depths, 60–1000 m
  • Special Notices apply, refer to Guidance Notes

Release Areas W13-4 and W13-5 are located within the Barcoo Sub-basin, the southernmost depocentre of the Browse Basin, and extend onto the Leveque Shelf. W13-5 also overlies the Oobagooma Sub-basin of the offshore Canning Basin in the south and Rowley Sub-basin of the Roebuck Basin in the southwest. These under-explored areas span the continental shelf, with water depths ranging from 60 m to over 1000 m. Release Areas W13-4 and W13-5 are located partly within a marine reserve Multiple Use Zone (IUCN VI) and are in proximity to a Marine National Park Zone (IUCN II); for further information refer to Special Notices.

The Barcoo Sub-basin is approximately 200 km long (northeast–southwest) by 130 km wide (northwest–southeast) and contains up to 12 km of Paleozoic to Cenozoic sedimentary strata. The most likely source of the hydrocarbons in this sub-basin is the Lower to Middle Jurassic Plover Formation. Hydrocarbons could also be sourced from Permo-Carboniferous and Upper Triassic units in the Oobagooma and Rowley sub-basins, respectively. Miocene fault-reactivation inversion anticlines along the margin of the Barcoo Sub-basin and Leveque Shelf provide structural traps, with an inferred hydrocarbon column at Arquebus 1 ST1. A gas accumulation was intersected in the lower Cretaceous drape over erosional basement highs on the Leveque Shelf at Psepotus 1, east of the 2013 Release Areas.

Related documents
Document TitlePDFOther Format
Release Area Map – Barcoo Sub-basin PDF JPG
Geology – Barcoo Sub-basin PDF DOC
Data Listing – Barcoo Sub-basin PDF XLS
Block Listing – Barcoo Sub-basin PDF DOC
Block Diagram –  Barcoo Sub-basin PDF JPG
Regional Geology – Browse Basin PDF DOC
Further information on bidding and assessment PDF DOC
2013 Acreage Release Special Notices PDF DOC

Note: Due to the complexity of these figures no alternative descriptions have been provided.
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