EXPLORE AUSTRALIA

BIDS CLOSE 9 OCTOBER 2008

BARROW SUB-BASIN, CARNARVON BASINWESTERN AUSTRALIA Release areas W08-16 and W08-17

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

Sea level

Sea floor

Tertiary

Upper Cretaceous

Muderong Shale - regional seal

Barrow Group

Lower & Middle Jurassic

3

5

1

2

4 4

NOT TO SCALE

Flin

ders

Fau

lt

Mungaroo Formation

NW SE

Rankin Platform Tryal Rocks Tce Barrow Island Trend

Barrow Sub-basin

1 2 3 4 5Base Tertiary structural/stratigraphic play

Birdrong Sandstone/MardieGreensand structural/stratigraphic play

Top Barrow Group structural/stratigraphic play

Mungaroo Formationhorst play

Intra-Dingo Claystonestructural/stratigraphic play

W08-16 & 17

07-2459-3

Mungaroo Formation

Dingo Claystone -

main oil source rocks

500

200

1000

W08-19

W08-20

W08-16

W08-17

WA

Iago Wilcox

West Tryal Rocks

Spar

Woollybutt

South Pepper

North Herald

Chervil

Chervil South

SaladinCrest

Maenad

115

20

21

WA-268-P

WA-269-P

WA-18-R

WA-26-R

WA-192-P R3

WA-290-P

WA-329-P

WA-360-P

Jansz/Io

114

Leatherback

Eskdale

Strickle

Macedon

Corowa

Blencathra

Pluto

Wheatstone

Cowle

Yammaderry

SkateRoller

Geryon

Urania

Dionysus

Chrysaor

Gorgon

John Brookes

Maitland

WA-214-PR2

East Spar

Wonnich

Griffin Chinook/Scindian

Scafell

EnfieldVincent

WA-255-P R1

WA-357-P

WA-322-P

WA-335-P

WA-12-RR1WA-271-P R1

WA-264-P R1

WA-374-P

WA-356-P

WA-373-P

WA-372-PWA-358-P

WA-354-P

WA-370-P

WA-351-P

WA-253-PR1

07-2459-4

0 50 km

Barrow Island

Barrow Island

Pyrenees

Laverda/Skiddaw

Ravensworth

CrosbyHarrison

Novara/Coniston

Orthrus

Stybarrow

Outlines are updated at irregular intervals but with at least one major update per year.Field outlines supplied by Encom Petroleum Information Pty Ltd. Field outlines in GPinfo are sourced from the operators of the fields only.

WA

NT

SA

QLD

NSW

VIC

TAS

500

Barremian (Windalia Sandstone)

Paleocene

Tithonian, Oxfordian and Middle Jurassic

Upper Triassic (Brigadier and MungarooFormations)

Period (Formation)

Valanginian & Berriasian (Barrow Group)& Birdrong Sst

Gas pipeline

Oil pipeline

2008 release area

Existing petroleum permit

Bathymetry contour (depth in metres)

Oil accumulation Gas accumulation

Perentie

HarrietBambra

Rosette

AgincourtTanami

WA-392-P

WA-374-P

WA-390-P

WA-268-P

WA-269-P

WA-205-P

WA-356-P

WA-354-P WA-395-P

WA-335-PWA-358-P

WA-290-P

WA-322-P

WA-391-P

WA-370-P

WA-255-P

WA-350-P

WA-372-P

WA-334-P

WA-350-P

WA-22-L

WA-355-P

WA-400-P

WA-369-P

WA-7-L

Io/Jansz

Eurytion

Gorgon

Pluto

Spar

Maenad

Wheatstone

Geryon

Iago

John Brookes

Orthrus

Chrysaor West Tryal Rock

MaitlandEast Spar

Dionysus

Urania

Montgomery

Barrow Island

Woollybutt

Wonnich

Saturn 1

Venture 1

Bluebell 1

Pasco 1-4

Antiope 1Kurrajong 1

W08-16W08-17

W08-19

200

1000

WA

NT

SA

QLD

NSW

VIC

TAS

07-2405-28

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.

Petroleum exploration well - dry hole

Petroleum exploration well - gas show

Petroleum exploration well - oil show

Petroleum exploration well - gas discovery

Petroleum exploration well - oil discovery

Petroleum exploration well - oil and gas discovery

2008 release area

Gas field

Oil field

Bathymetry contour (depth in metres)500

Gas pipeline

Existing petroleum title

Julimar 1

0 50 km

115°114°

20°

21°

Clio 1

Petroleum exploration well - unclassified

Release areas W08-16 and W08-17

infrastructure

acreage

Notes.

Geoscience Australia Reports/ProductsNew Reports/Products

continental margins. (2006) GA Record 2006/004.

Other Reports/Products

Plateau, synthesis report. (2006) Geoscience Australia Repository destructive analysis report 1297 unpublished

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

Record 2004/13

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

Current Exploration Opportunities in the Barrow Sub-basin, Carnarvon Basin, Western AustraliaOffshore Australia. Open for bids until 9 October 2008

NORTHERN EXMOUTH PLATEAU PETROLEUM PLAY ELEMENTS

Source Thick Triassic sections on the Exmouth Plateau, in particular the deltaic sediments of the Mungaroo Formation which are considered the source of the major gas fi elds. Migration from the proven Jurassic oil kitchen of the Barrow Sub-basin.

Reservoir Proven sandstone reservoirs in the Late Triassic (Mungaroo Formation), Early Cretaceous (Barrow Group and Birdrong Sandstone) and Paleocene (Maitland Sandstone) and potential reservoirs within the Late Jurassic on the Tryal Rocks Terrace.

Seal Regional seal of the Cretaceous Muderong Shale. Intra-formational seals within the Late Triassic and Early Cretaceous deltaic sequences. Argillaceous facies of the Paleocene Dockrell Formation provide the seal for the Maitland gas fi eld.

Traps Triassic fault blocks and associated drape, structural/stratigraphic traps in the Late Jurassic, Early Cretaceous and Cenozoic sections.

Infrastructure and Markets

Current oil and gas production from the surrounding fi elds. Gas is piped from the nearby John Brookes and East Spar fi elds to supply the domestic market and there are plans for export LNG from Gorgon and associated fi elds.

Lithology

Primary Secondaryor local

Formation

Primary Secondaryor local

Seismicmarker

CardabiaCalcarenite Dockrell Fm

Lambert Fm

Miria Marl

KorojonCalcarenite

Withnell Fm

Toolonga Calcilutite

GearleSiltstone

HaycockMarl

Windalia Radiolarite

Windalia Sst

Mardie GreensandBirdrong Sst

Malouet FmFlacourt Fm

Angel FmDupuy Fm

DingoClaystone

Calypso Fm

Legendre Fm

Athol Fm

Murat Siltstone

North RankinFm

Brigadier Fm

Mungaroo Fm

Locker Shale

TE

RT

IAR

YC

RE

TA

CE

OU

SJU

RA

SS

ICT

RIA

SS

ICP

ER

MIA

N

Ear

lyLa

teLa

teE

arly

Mid

dle

Late

Mid

dle

Ear

ly

Dep

osi

tio

nal

En

viro

nm

ent

Mar

ine

Mar

ine

Mar

ine

Mar

ine

Del

taic

Mar

ine

& d

elta

icM

arin

e &

flu

vial

Flu

vial

to

mar

ine

So

urc

e

Res

ervo

ir

Sea

l

Significant discovery

Pas

sive

mar

gin

Lat

esy

n-r

ift

Mai

n s

yn-r

ift

Ear

ly s

yn-r

ift

Pre

-rif

t ac

tive

mar

gin

Maastrichtian

Campanian

SantonianConiacian

Turonian

Cenomanian

Albian

Aptian

Barremian

Hauterivian

Valanginian

Berriasian

Tithonian

Kimmeridgian

Oxfordian

Callovian

Bathonian

Bajocian

Aalenian

Toarcian

Pliensbachian

Sinemurian

HettangianRhaetian

Norian

Carnian

Ladinian

Anisian

Spathian

Nammalian

Griesbachian

KV

K

JOJC

JP1

TR

P

Hia

tus

at t

he

Mai

n U

nco

nfo

rmit

y (M

U o

r IJ

U)

M. australis

Barrow Gp

Exm

ou

th S

ub

-bas

in

Exm

ou

th P

late

au

Ran

kin

Pla

tfo

rm

Bar

row

Su

b-b

asin

Dam

pie

r S

ub

-bas

in

Bea

gle

Su

b-b

asin

Po

st-r

ift

acti

ve

KS/KC

T

(Stag) Sst

KA

Meg

a-se

qu

ence

Macedon Fm

Zeepaard Fm& Flag Sst

MuderongShale

Jansz SstBiggada Sst

Linda SstLearmonth Fm

07-2459-2

Age(Ma)

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

Ep

och

Sys

tem

Potential

1. Location map of areas W08-16 and W08-17, showing existing petroleum permits, known fi elds and discoveries, and gas pipelines.

2. Major oil and gas accumulations in the western Barrow Sub-basin, offshore Exmouth Sub-basin and southern Exmouth Plateau.

3. Regional stratigraphy of the northern Carnarvon Basin.

4. Schematic cross-section across the Rankin Platform and Barrow Sub-basin, with emphasis on petroleum plays.

4

31

2