EXPLORE AUSTRALIA

BIDS CLOSE 9 APRIL 2009

BEDOUT SUB-BASIN, ROEBUCK BASIN WESTERN AUSTRALIA Release areas W08-11, W08-12, W08-13, W08-14 and W08-15

FOR MORE INFORMATION CONTACT:

Mr Bob PeglerGeneral ManagerOffshore Resources BranchResources DivisionDepartment of Resources, Energy and TourismGPO Box 1564, CANBERRA ACT 2601AUSTRALIATelephone: +61 2 6213 7928Facsimile: +61 2 6213 7955E-mail: petroleum.exploration@ret.gov.auInternet: www.ret.gov.au/petexp

FOR GEOSCIENTIFIC ENQUIRIES CONTACT:

Dr Clinton FosterChief of DivisionPetroleum & Marine DivisionGeoscience AustraliaGPO Box 378, CANBERRA ACT 2601AUSTRALIATelephone: +61 2 6249 9447Facsimile: +61 2 6249 9933E-mail: Clinton.Foster@ga.gov.auInternet: www.ga.gov.au

IDEAS 8007-1

WESTERN

AUSTRALIA

NORTHERN

TERRITORY

SOUTH

AUSTRALIA

QUEENSLAND

NEW SOUTH WALES

VICTORIA

TASMANIA

Hobart

Melbourne

Sydney

Brisbane

Darwin

Perth

30°

10°

120° 140°

0 1000 km

NT08-1 to 3

W08-1 to 3W08-4 to 6

AC08-5 & 6W08-7 to 10

W08-11 to 15W08-21

& 22

W08-18 to 20W08-16 & 17

W08-23 & 24

AC08-7 & 8AC08-1 to 4

2008 Offshore Acreage Release Area

2008 Designated Frontier Area

2007 Offshore Acreage Release AreaBids close April 2008

Existing petroleum explorationor development titleGas pipelineOil pipeline

Offshore Acreage Release AreaBids closed/under consideration

2008 Release of Offshore Petroleum Exploration AreasThe 2008 Offshore Petroleum Exploration Acreage release comprises 35 Release areas, located across five basins. The Release areas range from frontier to mature status and offer opportunities for exploration companies of all sizes.

Comprehensive acreage release information packs can be obtained (free of charge) by emailing contact details to: petroleum.exploration@ret.gov.au

1. Location of Release areas W08-11 to 15, Bedout Sub-basin showing existing petroleum title areas and significant wells.

2. Petroleum systems of the Roebuck Basin (modified after Smith, 1999 and Smith et al, 1999). Seismic line 120-04 is shown in Figure 3.

3. Seismic line 120-04 through Minilya 1 and Lagrange 1 (location of line shown in Figure 2).

4. Stratigraphy of the Bedout Sub-basin (after Smith, 1999; Smith et al, 1999).

BEDOUT SUB-BASIN PETROLEUM PLAY ELEMENTS

Source Early Triassic Locker Shale. Potential Permian (Noonkanbah Formation) and Early to Middle Jurassic (Bedout and Depuch formations) marine shales.

Reservoir Middle Triassic Lower Keraudren Formation, Late Triassic Upper Keraudren Formation, Middle Jurassic Depuch Formation.

Seal Cossigny Member of the Middle Triassic Keraudren Formation (regional seal), Late Triassic to Early Jurassic Bedout Formation (regional seal), Cretaceous and Tertiary marine sediments.

Traps Faulted antliclines at the Middle Triassic and top Triassic levels. Stratigraphic pinchout against the Lambert Shelf, Broome Platform and Bedout High.

Infrastructure and Markets

Designated Frontier Area Tax Concession applies to Release areas W08-13 and W08-15.

Current Exploration Opportunities in the Bedout Sub-basin, Roebuck Basin, Western Australia Offshore Australia. Open for bids until 9 April 2009

W07-14

W07-13

W07-20Nebo 1

Halo 1

Cimba 1

Bruce 1

Bedout 1

.Phoenix 1

Minilya 1

Huntsman 1

Lagrange 1

Whitetail 1

Keraudren 1

Poissonnier 1

North Turtle 1

East Mermaid 1

Depuch 1

Lacepede 1

Darwin 1

200

1000

W08-15

W08-13W08-12W08-11

W08-14

WA-297-P

WA-291-P

Port Hedland

WA

NT

SA

QLD

NSW

VIC

TAS

0 100 km

07-2405-27

Well symbols supplied by Geoscience Australia (basic data open file) and Encom Petroleum Information Pty Ltd (basic data confidential).These were generated from open file data as at 31 Jan 2008.

Huascaran 1

Picard 1

2007 release area

2008 release area

2008 designated frontier release area

Bathymetry contour (depth in metres)500

Gas pipeline

Petroleum exploration well - dry hole

Petroleum exploration well - gas show

Petroleum exploration well - oil discovery

Existing petroleum title

WESTERN AUSTRALIA

120°118°

18°

20°

East Mermaid 1Huntsman 1

Whitetail 1

Manaslu 1

Keraudren 1

Lacepede 1

Wamac 1

Bruce 1

Halo 1Cimba 1

Picard 1

W08-11W08-12

W08-13

W08-14

W08-15

Sheherazade 1

Arquebus 1

ODP 765A

Depuch 1

Lagrange 1

Barcoo 1Lombardina 1

Argo Abyssal Plain

BROWSEBASIN

NORTHERNCARNARVON

BASIN

BeagleSub-basin

OFFSHORECANNING

BASIN

Willara Sub-basin

OobagoomaSub-basin

LevequeShelf

Barcoo Sub-basin

Scott Plateau

BedoutHigh

Bedout Sub-basin

Lambert Shelf

Broome Platform

Rowley Sub-basin ROEBUCK BASIN

Thouin Graben

Nor

th

OobagoomaHigh

1000

07-2410-7Figure 4

Figure 3

0 100 km

Phoenix 2Phoenix 1

5000

Well symbols supplied by Geoscience Australia (basic data open file) and Encom Petroleum Information Pty Ltd (basic data confidential).These were generated from open file data as at 31 Jan 2008.Field outlines supplied by Encom Petroleum Information Pty Ltd. Field outlines in GPinfo are sourced from the operators of the fields only.Outlines are updated at irregular intervals but with at least one major update per year.

Minilya 1Bedout 1

Darwin 1Nebo 1

WA

NT

SA

QLD

NSW

VIC

TAS

North Turtle 1Huascaran 1

Hin

geZo

neTu

rtle

Poissonnier 1

121°120°119°118°

16°

17°

18°

19°

Petroleum exploration well - dry hole

Petroleum exploration well - gas show

Petroleum exploration well - oil discoveryFault

Anticline

Bathymetry contour (depth in metres)500

2008 release area

200

0

1

2

3

4

5

6

7

8

9

10

Two-

way

tim

e (s

)

W E

Permian

and older

Tertiary

Triassic

Basement

W08-11 W08-12 W08-13

Bedout Sub-basin Bedout Sub-basin Broome PlatformBedout HighRowley Sub-basin

Bedout 1Lagrange 1Minilya 1

0 50 km

Line 120-04

North TurtleHinge Zone

C a r b o n i f e rou s

Cretaceous

Jurassic

Beagle Sub-basin

07-2410-3

31

2

Sys

tem

Upper Grant Gp

Poole Sst

Noonkanbah Fm

Liveringa Group

Bedout Volcanics

Locker Shale

Keraudren Fm

Bedout Fm

Depuch Fm

Baleine Fm

Egret Fm

Broome Sst

Mermaid Fm

Nelson Rocks Fm

Toolonga Calcilutite

Miria Marl

Tectonic Events

NW

S R

ifts

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

RowleySub-basin

BedoutHigh

BedoutSub-basin

Meg

a S

eq.

Sei

s M

ark.

UnnamedUnits

UnnamedUnits

UnnamedUnits

UnnamedUnits

KeraudrenFm

RowleyVolcs

Cz2

P 3

Cz1

PA

SS

2M

z6P

AS

S 1

Mz5

SA

G 4

Mz4

SA

G 3

Mz3

SA

G 2

Mz2

EX

T 3

Mz1

SA

G 1

Pz3

TR

AN

S 1

2

3

4

5

Australia Northern Margin-Eurasia plate collision. NE-SWleft-lateral oblique-slipreactivation of older structure

Initiation of northward platedrift of Australia. N-S?compressive event. Upliftfollowed by minor faultreactivation

Australia Southern Margin-Antarctic plate separation

Australia Western Margin-India plate separation. WNW-ESE extension. Minor upliftand fault reactivation

Australia NWS-Argo Landplate separation. NNW-SSEextension. Uplift and erosion.Rift shoulder development onouter margin

Fitzroy Movement III. AustraliaNWS-Unknown plateseparation. NNW-SSEextension. Uplift and erosion.Rift shoulder development onouter marginFitzroy Movement II. NW-SEtranspressional anticlinedevelopment in the FitzroyTroughFitzroy Movement I. NW-SEoblique-slip fault reactivationof existing structures alongthe North Turtle Hinge Zone

Bedout Movement. Basinwideuplift and erosion. Depositionof volcanics. Change instructural style from faultcontrolled subsidence tothermal subsidence

Transition from NE-SWintracratonic extension toNNW-SSE extension. NW-SEfault reactivation, ENE-SSWfault developoment.Separation of Australia NWS-SIBUMASU terrane

Meda Transpressional eventin Canning Basin

Pleist

CR

ET

AC

EO

US

JUR

AS

SIC

TR

IAS

SIC

PE

RM

IAN

V

V V

Major M0 spreading ridge-jump in the India Ocean.NW-SE? oblique-slipreactivation and inversionin the OobagoomaSub-basin

Cossigny Member

Age(Ma) E

po

ch

TE

RT

IAR

Y

07-2410-4

Pal

.E

arly

Late

Late

Late

Late

Late

Ear

lyE

arly

Early

Mid

dle

Mid

dle

Mio

cene

Eoc

ene

Olig

.

Plio.

Lithostratigraphy

CARB

4

Release areas W08-11, W08-12, W08-13, W08-14 and W08-15

to areas W08-13 and W08-15

Carnarvon Basin hydrocarbon province

active petroleum system in the area

Geoscience Australia Reports/Products New Reports/Products

Post Survey Report: Natural hydrocarbon seepage survey on the central North West Shelf. (2007) GA Record 2007/21.

Other Reports/Products

geochemistry and correlation of crude oils and condensates from Western Australia and Papua New Guinea. (2005) Geoscience Australia and GeoMark Research

offshore northwest Australia —1:3,000,000 scale. (2004) GeoCat # 61179

profiles. Offshore northern and northwestern Australia. (2003) GeoCat # 35234, 35245 and 35247

Australian basins: Carnarvon Basin module. AGSO and Geotechnical Services Non-exclusive Study. (2000)1997/057

AGSO Record 1997/038.Contact Geoscience Australia’s Sales Centre for more information or to order these reports or products, phone 61 (0)2 6249 9966, e-mail sales@ga.gov.au Relevant Industry Data

www.nwsda.com