australia 2013 – offshore petroleum exploration...
TRANSCRIPT
AUSTRALIA 2013Offshore Petroleum Exploration Acreage Release
RELEASE AREAS V13-1, EASTERN OTWAY BASIN, VICTORIA
Figure 1 Location of the 2013 Release Area in the Otway Basin
HIGHLIGHTS
BIDS CLOSE – 21 November 2013• Located within a gas producing region
• Access to existing infrastructure and growing energy market
• Shallow to deep water depths, 70–1030 m
• Plays include faulted anticlines and tilted fault blocks with cross-fault seal
• Multiple potential oil- and gas-prone source rocks and active petroleum systems within the region
• Special Notices apply, refer to Guidance Notes
Release Area V13-1 is located partly within the highly prospective Shipwreck Trough and extends onto the Prawn Platform in the eastern Otway Basin. The Release Area contains two exploration wells, Loch Ard 1 and Eric the Red 1.
The Otway Basin is a northwest-trending passive margin rift basin that was formed during Gondwanan break-up and the Antarctic-Australian separation. Rift-related faulting resulted in the development of large, deep depocentres, including the Voluta and Shipwreck troughs in the offshore part of the basin. The Shipwreck Trough is a structural depression between the Mussel and Prawn platforms. Deposition throughout the Late Cretaceous was dominated by deltaic sedimentation of the Sherbrook Group, which is >5000 m thick in the trough and contains most of the offshore gas discoveries. Two potential petroleum systems occur in the depocentre to the west of the Release Area; the proven Lower Cretaceous Austral 2 Petroleum System that is the source of the produced gas in the region, and the Upper Cretaceous Austral 3 Petroleum System with a potential Turonian oil-prone source rock.
AUSTRALIA 2013 Offshore Petroleum Exploration Acreage Release 1
WESTERNAUSTRALIA
NORTHERNTERRITORY
SOUTHAUSTRALIA
QUEENSLAND
NEWSOUTHWALES
VICTORIA
TASMANIA
Area V13-1Otway Basin
12-6829-1
AUSTRALIA 2013 Offshore Petroleum Exploration Acreage Release 2
Figure 2 Structural elements of the Otway Basin showing petroleum fields and discoveries, the location of regional cross-sections and the 2013 Release Area
INNER OTWAY BASIN
HunterSub-basin
TorquaySub-basin
Loch Ard 1
Eric The Red 1
Nerita 1
Wild Dog 1
VICTORIA
KingIsland
Cape Otway -
King Island HighVoluta 1
Figure 5
Triton 1Conan 1Mussel 1
Champion 1
Prawn A1
VICTORIA
TASMANIA
VICTO
RIA
Callister 1Discovery Bay 1
BridgewaterBay 1
Normanby 1
Breaksea Reef 1
Hill 1
Amrit 1
Pecten 1A
Shipw
reck Trough
Figure 4
PrawnPlatform
HunterSub-basin
NelsonSub-basin
OtwayRanges
V13-1
Henry
Thylacine
Casino
Martha
La BellaGeographe
Minerva
ButtressLangley
0 75 km
WA
NT
SA
QLD
NSWVIC
TAS
12-6829-2
Well symbol information is sourced either from "open file" data from titleholders where this is publicly available as at 1 December 2012 or from other public sources. Field outlines are provided by EncomGPinfo, a Pitney Bowes Software (PBS) Pty Ltd product. Whilst all care is taken in the compilation of the field outlines by PBS, no warranty is provided re the accuracy or completeness of the information, andit is the responsibility of the Customer to ensure, by independent means, that those parts of the information used by it are correct before any reliance is placed on them.
38°
40°
144°142°
Petroleum exploration well - Not classifiedPetroleum exploration well - Dry holePetroleum exploration well - Oil and gas showPetroleum exploration well - Gas showPetroleum exploration well - Gas discovery
Minor faultMajor fault
Buried Paleozoic basement high
2013 Offshore PetroleumAcreage Release Area
Gas field
Eumeralla Formation outcrop Basin outlineSub-basin outlineSeismic section figure location
Scheduled area boundary(OPGGSA 2006)
Gas pipelineGas pipeline (proposed)
Oil pipeline
AUSTRALIA 2013 Offshore Petroleum Exploration Acreage Release 3
Figure 3 Stratigraphy and hydrocarbon discoveries of the Otway Basin based on the Otway Basin Biozonation and Stratigraphy Chart 34 (Mantle et al, 2009). Geologic Time Scale after Gradstein et al (2012)
10
20
30
40
50
60
70
80
90
100
110
120
130
Berriasian
Valanginian
Hauterivian
Barremian
Aptian
Cre
tace
ous
Albian
Early
Cenomanian
Turonian
Coniacian
Santonian
Campanian
Late
Maastrichtian
Danian
Selandian
Thanetian
Ypresian
Lutetian
Bartonian
Priabonian
Eocene
Paleocene
Pale
ogen
e
Rupelian
Chattian
Oligocene
Aquitanian
Burdigalian
Langhian
Serravallian
Tortonian
MessinianZanclean
PiacenzianGelasianCalabrian
IonianTarantianHolocene
Pleistocene
Pliocene
MioceneNeo
gene
Quaternary
T4
T3
T2
T1
LC2
LC1.1
LC1
EC2
Otway Basinhorizons
(Krassay et.al, 2004)
Heytesbury
Nirranda
Wangerrip
Sherbrook
Shipwreck
Eumeralla
Crayfish
WhalersBluff
12-6829-3
GellibrandMarl
Lindon 1
Windermere 2
Port Fairy 1
Geographe 1
Flaxmans 1Vaughan 1
Port Campbell 4Windermere 1
Port Fairy 1Geographe North 1
Westgate 1A
Argonaut 1A
Boggy Creek 1Buttress 1Caroline 1
Casino 1Casino 2Casino 3Dunbar 1
Grumby 1Halladale 1 DW1
Henry 1 ST1Iona 1-2
La Bella 1Langley 1McIntee 1Martha 1
North PaarattePecten 1A
Penryn 1Port Campbell 1
Seamer 1Skull Creek 1
Thylacine South 1Vaughan 1
Wallaby Creek 1
Breaksea Reef 1 ST1Callista 1
Howmains 1Minerva 1-4Normanby 1Thylacine 1
Triton 1 ST1
Breaksea Reef 1 ST3
Major 1
Garvoc 1Wallaby 2
Port Campbell 4
Breaksea Reef 1Port Fairy 1
Mylor 1
Geographe 1, Thylacine 1
Casino 2, Halladale 1 DW1
Casino 1, Minerva 1-4
Flaxmans 1, Langley 1Skull Creek
Period Epoch StageAge(Ma)
Otway Basinphases
Port Campbell Embayment(including Shipwreck Trough)
FlaxmanFormation (B)
FlaxmanFormation (A)
WaarreFormation (Cb)
WaarreFormation (Ca)
WaarreFormation (B)
WaarreFormation (A)
EumerallaFormation
Otw
ay G
roup
Pretty HillFormation
CastertonFormation
Hey
tesb
ury
Gro
up
Port CampbellLimestone
Hanson Plain Sand
Newer Volcanics
CliftonFormation
NarrawaturkMarl (Upper)Wangoom
SandNarrawaturk
Marl(Lower)
MepungaFormation
Nirr
anda
Gro
up
DilwynFormation
PemberMudstone
Wan
gerri
p G
roup
Pebble PointFormation
(Upper)Pebble Point
Formation(Lower)
MassacreShale
Wiridjil Gravel
TimboonSandstone
SkullCreek
MudstoneSh
erbr
ook
Gro
up
Belfast Mudstone (C)
Belfast Mudstone (B)
BanoonMember
Hydrocarbon Shows
NullawarreGreensand
Belfast Mudstone (A)Flaxman
Formation (C)
Paar
atte
Form
ation
AUSTRALIA 2013 Offshore Petroleum Exploration Acreage Release 4
Figure 4 AGSO seismic line 137/05 across the easternmost Shipwreck Trough and Prawn Platform, Otway Basin. Location of the line is shown in Figure 2. Modified after O’Brien et al, 2006
V13-1
Top Basement
Top Mirranda Group
Top WangeripGroup
Cretaceous
Top
Top Otway Group
Top Warree Formation
Top Flaxman Formatio
nTop Belfast Mudstone
Prawn PlatformShipwreckTrough
Minerva 1 Loch Ard 1NW SE
12-6829-4
0D
epth
(km
)
5
4
3
2
1
Line AGSO 137/05
AUSTRALIA 2013 Offshore Petroleum Exploration Acreage Release 5
Figure 5 Regional cross section across the Otway Basin showing position of the present-day peak hydrocarbon generation zone. Location of the line is shown in Figure 2. Modified after O’Brien et al, 2009
Basement
V13-1OTWAY BASIN Cape Otway -
King Island High
Current peakgeneration zone
Heytesbury Group
Nirranda Group
Wangerrip Group
Sherbrook Group
Belfast Mudstone
Turonian sections
Otway Group
Pecten 1A Minerva 1 Loch Ard 1EW
12-6829-5
0
2
Dep
th (k
m)
4
6
8
10
12
14
AUSTRALIA 2013 Offshore Petroleum Exploration Acreage Release 6
PETROLEUM SYSTEMS ELEMENTS
Eastern Otway Basin
Sources • Aptian–Albian lower coastal plain and peat swamp Eumeralla Formation shale and coal (Austral 2)
• Upper Cretaceous–lowest Paleogene fluvio-deltaic Sherbrook Group (Turonian Waarre Formation and Coniacian–Santonian Belfast Mudstone) and marginal marine basal Wangerrip Group (Austral 3 unproven offshore)
Reservoirs • Upper Cretaceous lower delta plain and marginal marine Waarre and Flaxman formations
• Upper Cretaceous marine Thylacine Member, Belfast Mudstone
• Upper Cretaceous deltaic Paaratte Formation
• Paleocene shallow marine Pebble Point FormationChallis Formation and deltaic Nome Formation
Seals Regional seal• Upper Cretaceous Belfast Mudstone
Intraformational seals• Uppermost Cretaceous/Paleocene Massacre Shale
• Paleocene–Eocene Pember Mudstone and Dilwyn Formation
• Eocene Mepunga Formation
Traps • Faulted anticlines, tilted fault blocks with cross-fault seal
INFRASTRUCTURE AND MARKETSThe 2013 Release Area is proximal to the Geographe, Thylacine and La Bella gas fields. The eastern Otway Basin is an established gas producing province that services the southeastern Australian energy market. The greater Melbourne region currently represents Australia’s largest domestic gas market and is supported by major petroleum refineries. The City of Portland is the nearest centre along the western Victorian coast and is known for the deep water port that was established for aluminium smelting operations
CRITICAL RISKSThe key risk is migration distance and access to hydrocarbon charge from effective source kitchens within the Shipwreck Trough. Fault-seal integrity is an issue on the Prawn Platform, particularly as local structuring occurred during the Turonian. The presence of sufficiently thick intraformational and regional sealing lithologies over good quality reservoirs is also uncertain.
DATA SETSFor the Wells Data Listing go to http://www.petroleum-acreage.gov.au/2013/support/geo.html
For the Seismic Surveys Listing go to http://www.ga.gov.au/energy/projects/acreage-release-and-promotion/2013.html#data-packages
AUSTRALIA 2013 Offshore Petroleum Exploration Acreage Release 7
GEOSCIENCE AUSTRALIA PRODUCTS
Regional Geology and Seismic• Geology and hydrocarbon prospectivity of the deepwater Otway and Sorell basins, offshore southeastern Australia.
Geoscience Australia Record 2013/02. GEOCAT 74603.
• Time-Depth Functions for the Otway Basin. Geoscience Australia Record 2004/02. GEOCAT 49566
• An Audit of Selected Offshore Petroleum Exploration Wells in the Otway Basin, Southeastern Australia. Geoscience Australia Record 2003/21. GEOCAT 47377
• Deep Structure of the Otway Basin, Southeastern Australia, Survey 137 (Phases 1 and 2): Post-cruise report. Australian Geological Survey Organisation Record 1995/18. GEOCAT 14810
• NGMA/PESA Otway Basin Symposium, Melbourne, 20 April 1994: Extended Abstracts. Australian Geological Survey Organisation Record 1994/14. GEOCAT 14724
• Otway Basin Cross-section, SA, Australian Geological Survey Organisation Record 1992/07. GEOCAT 14518
• Otway Basin Seismic Data, 1992. GEOCAT 20759
• Offshore Otway Basin Study, 1988. GEOCAT 20829
• Extended abstracts: Otway Basin Workshop, Canberra, 17 March 1987, Bureau of Mineral Resources Record 1987/09. GEOCAT 14137
Stratigraphy• Otway Basin Biozonation and Stratigraphy Chart 9 – Otway Basin. GEOCAT 23350
• Otway Basin Biozonation and Stratigraphy Chart 34 – Otway Basin. GEOCAT 70371
• New and Revised Palynological Data for the Otway Basin, Geoscience Australia Record 2004/22. GEOCAT 61366
• Otway Basin - Biostratigraphic Dataset, 2001. GEOCAT 37688
Petroleum Systems and Accumulations• The Oils of Eastern Australia, 2002. GEOCAT 68754
• South-eastern Australia Surface Geochemistry II: Light Hydrocarbon Geochemistry in Bottom-waters of the Gippsland Basin, Eastern Otway Basin, Torquay Sub-basin and the Durroon Sub-basin. Vols 1 and 2, Australian Geological Survey Organisation Record 1992/54. GEOCAT 14562
• Australian Petroleum Accumulations Report. Otway Basin, South Australia, Victoria and Tasmania, 1990. GEOCAT 37053
• Preliminary Post-cruise Report: Hydrocarbon Gas Geochemistry in sediments of the offshore Otway and Gippsland Basins: Project 9131.20
Contact Geoscience Australia’s Sales Centre for more information or to order these reports or products, phone 61 (0)2 6249 9966, email [email protected]
AUSTRALIA 2013 Offshore Petroleum Exploration Acreage Release 8
KEY REFERENCESBOREHAM, C.J., HOPE, J.M., JACKSON, P., DAVENPORT, R., EARL, K.L., EDWARDS, D.S., LOGAN, G.A. AND KRASSAY, A.A., 2004—Gas–oil–source correlations in the Otway Basin, southern Australia. In: Boult, P.J., Johns, D.R. and Lang, S.C. (eds), Eastern Australasian Basins Symposium II, Petroleum Exploration Society of Australia, Special Publication, 603–627.
CLIFF, D.C.B., TYE, S.C. AND TAYLOR, R., 2004—The Thylacine and Geographe gas discoveries, offshore eastern Otway Basin. The APPEA Journal 44(1), 441–462.
GEOLOGICAL SURVEY OF VICTORIA, 1995—The stratigraphy, structure, geophysics and hydrocarbon potential of the Eastern Otway Basin. Geological Survey of Victoria, Report 103, 241 pp.
GIBSON, G.M., MORSE, M.P., IRELAND, T.R. AND NAYAK, G.K., 2011—Arc-continent collision and orogenesis in western Tasmanides: Insights from reactivated basement structures and formation of an ocean-continent transform boundary off western Tasmania. Gondwana Research, 19, 608–627.
GRADSTEIN, F.M., OGG, J.G. SCHMITZ, M.D. AND OGG, G.M. (eds), 2012—The Geologic Time Scale 2012: Volumes 1 and 2. Elsevier BV, 1144 pp.
HALL, M. and KEATLEY, J. 2009—Otway Basin, stratigraphic and tectonic framework. GeoScience Victoria 3D Victoria Report 2, Department of Primary Industries.
KRASSAY, A.A., CATHRO, D.L. AND RYAN, D.J., 2004—A regional tectonostratigraphic framework for the Otway Basin. In: Boult, P.J., Johns, D.R. and Lang, S.C. (eds), Eastern Australasian Basins Symposium II, Petroleum Exploration Society of Australia, Special Publication, 97–116.
LUXTON, C.W., HORAN, S.T., PICKAVANCE, D.L. AND DURHAM, M.S., 1995—The La Bella and Minerva gas discoveries, offshore Otway Basin. The APEA Journal, 35, 405–417.
MANTLE, D.J., BERNECKER, T., KELMAN, A.P. AND PARTRIDGE, A.D., 2009—Otway Basin, Biozonation and Stratigraphy, 2009, Chart 34. Geoscience Australia.
O’BRIEN, G.W., BERNECKER, T., THOMAS, J.H., DRISCOLL, J.P. AND RIKUS, L., 2006—An assessment of the hydrocarbon prospectivity of Areas VIC/O-06(1), VIC/O-06(2), VIC/O-06(3) and V06-1, eastern onshore and offshore Otway Basin, Victoria, Australia. Victorian Initiative for Minerals and Petroleum Report 90, Department of Primary Industries.
O’BRIEN, G.W., BOREHAM, C.J., THOMAS, H.J. AND TINGATE, P.R., 2009—Understanding the critical success factors determining prospectivity—Otway Basin, Victoria. The APPEA Journal, 49(1), 129–170.
PARTRIDGE, A.D., 2001—Revised stratigraphy of the Sherbrook Group, Otway Basin. In: Hill, K.C. and Bernecker, T. (eds), Eastern Australian Basins Symposium, A Refocused Energy Perspective for the Future, Petroleum Exploration Society of Australia, Special Publication, 455–464.