Bureau of Resources and Energy Economics

Northern Bonaparte

Location of release area

Release Areas – NT14-1, NT14-2 and NT14-3

Work program bids close 2 October 2014


  • Adjacent to Barossa, Caldita, Greater Sunrise, Evans Shoal and Evans Shoal South gas accumulations
  • Shallow to deep water depths, 50–600 m
  • Plays include faulted anticlines, horst structures, drape and unconformity traps
  • Multiple potential oil- and gas-prone source rocks within the region
  • Special Notices apply, refer to Guidance Notes

Release Areas NT14-1, NT14-2 and NT14-3 are located in the Calder Graben, Troubadour Terrace and Sahul Platform regions of the northern Bonaparte Basin respectively. Recent drilling in the area includes Blackwood 2 (2013), Evans Shoal North 1 (2013) and Heron South 1 (2012). The three Release Areas lie approximately 350 km offshore from Darwin.

The Sahul Platform is an area of relatively shallow basement with an overlying Permo–Triassic succession that was uplifted during Jurassic extension of the adjacent Malita and Calder graben. The southern boundary of the Sahul Platform is marked by northeast-striking Mesozoic normal faults showing displacement down into the Malita and Calder graben, creating a series of prominent blocks and terraces. The Malita Graben and Calder Graben form a major northeast-trending rift system that lies between the Petrel Sub-basin and the Sahul Platform.

The Jurassic Plover Formation is the primary source and reservoir for the Sahul Platform, Troubadour Terrace, Malita Graben and Calder Graben gas accumulations. Gas shows have also been found in fractured carbonates of the Lower Cretaceous Darwin Formation. Condensate sourced from the Cretaceous Echuca Shoals Formation (e.g. Blackwood 1ST1) indicates there could also be an under-explored liquid play in the region.

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

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