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2009 Petroleum Offshore Exploration Acreage Release

2009 Special Petroleum Offshore Acreage Release

Geology

Highlights

Release Areas NT09-Special and W09-Special, Petrel Sub-basin, Bonaparte Basin.

Regional Geology (.pdf 1.3 MB) is available as a downloadable file.

Release Areas (.pdf 1.2 MB) is available as a downloadable file.

Bids close - 3 December 2009

Overview

  • Under-explored, shallow water areas (< 50 m) in a proven Paleozoic oil and gas province.
  • Release Area NT09-Special contains the Barnett oil accumulation. Release Area W09-Special contains the Turtle oil accumulation. Both Release Areas are within close proximity to the Petrel, Tern and Blacktip gas fields and the Blacktip pipeline.
  • Play types include, horst-blocks, rotated fault-blocks, faulted anticlines, salt associated structures, stratigraphic traps, pinchouts and unconformity truncations.
  • Proven oil and gas-prone Carboniferous Langfield Group source rocks, potential gas-prone Carboniferous–Permian source rocks.
  • Most prospective reservoirs occur in the Carboniferous Weaber and Wadeye groups, and the Carboniferous–Permian Kulshill Group. The Early Triassic Ascalon Formation is the shallowest reservoir in the Blacktip gas field.
  • Good quality Permian Treachery Formation and Fossil Head Formation regional seals.
  • Special Notices apply, refer to Guidance Notes.

Petrel Sub-basin Petroleum Play elements

Source
Oil and gas sourced from the Early Mississippian Langfield Group.
Potential gas-prone Carboniferous-Permian source rocks.
Reservoir
Reservoirs include: Mississippian Weaber Group (Kingfisher Shale, Tanmurra Formation and Milligans Formation), Mississippian-Pennsylvanian Wadeye Group (Arco and Aquitaine formations), Pennsylvanian-Cisuralian Kulshill Group (Kuriyippi Formation, Treachery Formation and Keyling Formation).
The Early Triassic Ascalon Formation is the shallowest reservoir in the Blacktip gas field.
The Permian Hyland Bay Subgroup (Torrens, Cape Hay and Tern formations) are good quality reservoirs in the Petrel, Tern and Penguin gas accumulations.
Seal
Good quality Cisuralian Treachery Formation and Fossil Head Formation regional seals.
Intra-formational seals within the Mississippian Weaber Group.
Traps
Play types include, horst-blocks, rotated fault-blocks, faulted anticlines, salt associated structures, stratigraphic traps, pinchouts and unconformity truncations.
Infrastructure and Markets
The Release Areas are close to the Petrel, Tern and Blacktip gas fields. Gas from Blacktip will be piped to Darwin via the onshore gas plant near Wadeye and the Bonaparte trans-territory pipeline. This pipeline connects to the existing pipeline transporting gas from the Amadeus Basin to Darwin.

Release Area NT09-Special, Petrel Sub-basin, Bonaparte Basin, Northern Territory

Graticular Block Listing

Map Sheet SD 52 (Darwin)
1834 (part) 1835 1836 1837 1838 1839
1840 1841 (part) 1842 (part) 1906 (part) 1907 (part) 1908
1909 1910 1911 1912 1913 (part) 1979 (part)
1980 1981 1982 1983 1984 (part) 1985 (part)
2051 (part) 2052 (part) 2053 2054 2055 2056 (part)
2124 (part) 2125 2126 2127 (part) 2128 (part) 2196 (part)
2197 (part) 2198 2199 (part) 2269 (part) 2270 (part) 2271 (part)
2341 (part) 2342 (part)

Assessed to contain 44 blocks (includes 21 full blocks and 23 part blocks)

Graticular Block Map

For convenience, geographical coordinates shown on this map are expressed in terms of the Geocentric Datum or Australia 1994 (GDA94). Permit areas are defined by the 5 minute graticular block system set out under Section 16 of the Offshore Petroleum and Greenhouse Gas Storage Act 2006; under Sections 20, 21 and 21A of the Act, the position of those blocks is determined by reference to the Australian Geodetic Datum (AGD66).

Release Area W09-Special, Petrel Sub-basin, Bonaparte Basin, Western Australia

Graticular Block Listing

Map Sheet SD 52 (Darwin)
1907 (part) 1978 1979 (part) 2049 2050 2051 (part)
2052 (part) 2122 2123 2124 (part) 2195 2196 (part)
2197 (part) 2269 (part) 2341 (part)

Assessed to contain 21 blocks (includes 10 full blocks and 11 part blocks)

Graticular Block Map

For convenience, geographical coordinates shown on this map are expressed in terms of the Geocentric Datum or Australia 1994 (GDA94). Permit areas are defined by the 5 minute graticular block system set out under Section 16 of the Offshore Petroleum and Greenhouse Gas Storage Act 2006; under Sections 20, 21 and 21A of the Act, the position of those blocks is determined by reference to the Australian Geodetic Datum (AGD66).