BrazilBrazil Round 9Round 9

PotiguarPotiguar BasinBasin

Geologist Geologist Gustavo BarbosaGustavo BarbosaANPANP Bid Area DepartmentBid Area Department

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Infrastructure– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Exploratory Informations– Final Remarks

Location, Area and Geological Boundaries

NW geologicalboundary: Fortaleza High(offshore) and Aracati Platform (onshore)

NW geologicalboundary: Fortaleza High(offshore) and Aracati Platform (onshore)

SE geologicalboundary: Touros High (offshore) and Touros or East Platform (onshore)

SE geologicalboundary: Touros High (offshore) and Touros or East Platform (onshore)

•Area: 94.043 km2

Onshore: 31,354 km2;

Offshore: 62,690 km2

•Area: 94.043 km2

Onshore: 31,354 km2;

Offshore: 62,690 km2

Sector location and principal cities

Faz.BelémField

Fortaleza cityFortaleza city

Natal cityNatal city

Sector location

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Infrastructure– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Exploratory Informations– Final Remarks

Exploration Review

• Beginning of Exploration

(onshore): 1956

(offshore): 1972

1st offshore discovery – Ubarana Field: 1973

1st onshore discovery – Mossoró Field: 1979

Discovery of Canto do Amaro Field: 1985 (OOIP: 1.263 Mbbl)

Potiguar Basin Wildcats

Wildcats - Potiguar Basin - Onshore

0

10

20

30

40

50

60

70

80

9019

56

1976

1978

1981

1983

1985

1987

1989

1991

1993

1995

1997

1999

2001

2003

2005

Years

Num

ber

of w

ells

.

Exploration peak: 80´sExploration peak: 80´s

Exploration Review:General Data

•Volume in place (dec/2006):Oil: 5.330 Billion barrelsGas: 273.70 Bcf

•Volume in place (dec/2006):Oil: 5.330 Billion barrelsGas: 273.70 Bcf

•Accumulated Production(dec/2006):

Oil: 657.89 Million barrelsGas: 722 Bcf

•Accumulated Production(dec/2006):

Oil: 657.89 Million barrelsGas: 722 Bcf

•Total of oil and gas fields: 55

•Total of oil and gas fields: 55

•Reserves (dec/2006):Oil: 331.70 Million barrelsGas: 580 Bcf

•Reserves (dec/2006):Oil: 331.70 Million barrelsGas: 580 Bcf

Exploration Review: Operators and

Concessionaires

QUANTRA

PHOENIX

• 12 companies withConcession Contracts withANP. There are also operators of Marginal Fields

• 12 companies withConcession Contracts withANP. There are also operators of Marginal Fields

Onshore Exploration

• Seismic Lines: 2D: 36,815 km (up to June 05th, 2007)3D: 2,670 km2 (up to July, 2007)

• Wells:

Total of wells: 6,271 (up to June 5th, 2007)Wildcats: 835Explotation wells: 5,436

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Infrastructure– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Exploratory Informations– Final Remarks

InfrastructureInfrastructure

The offered areaThe offered area isis served by good highway networkserved by good highway network. .

The The Fazenda Belém Fazenda Belém FieldField is is about about 130 km 130 km from the from the Petrobras Petrobras lubricant plantlubricant plant at Fortalezaat Fortaleza and aroundand around 135 km 135 km from the Guamaréfrom the Guamaré“UPGN” (Natural “UPGN” (Natural GasGas PlantPlant), ), locatedlocated in in thethe Rio Grande do Norte Rio Grande do Norte StateState..

Infrastructure: Plants and pipelines

Lubricant Plant/ Fortaleza cityLubricant Plant/ Fortaleza city

GuamaréGas Plant

GuamaréGas Plant

pipelinespipelines

Guamaré Plant – Rio Grande do Norte State

Infrastructure:Roads and ports

Pecém Port/ Fortaleza cityPecém Port/ Fortaleza city

Natal PortNatal Port

Areia Branca and Guamaré Ports

Areia Branca and Guamaré Ports

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Infrastructure– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Exploratory Informations– Final Remarks

Origin of the Basin:

The Potiguar basin was formed after fracturing of the super-continent Gondwana, which resulted in a neocomain rift NE-SW,covered by neocretaceous and tertiary sediments.

Diacronism among:- Onshore Potiguar Basin- Tucano Jatobá Basin- Sergipe Alagoas Basin

Tectonic Evolution

Pre-drift reconstruction

Geological Map of the Northeastern region

Structural Framework

ARACATIPLATFORM

CARAÚNA

PESCADAARABAIANA

UBARANAAGULHA

ARATUM

AREIA BRANCA HIN

GE

CEAR

ÁR.

G. D

O N

ORT

E

EASTPLATFORM

RAL

RM

FC

PJ

FMQ

SOUTH BOA VISTA GRABENCANUDOS HIGH

QUIXABA HIGH

APODI GRABEN

BAIXA GRANDE FAULTCAC

VR

UPNJD

ET/RP

CARNAUS F

BAIAULT

GUAMARÉ GRABEN

NORTH BOA VISTA G

RABEN

FCN

CAM

MO

BVS

PMLRE/REP

MOSSORÓ HIGH

SERRA DO CARMO HIGH

PENDÊNCIA GRABEN

NMR

SE

TR

SMN

UMBUZEIRO GRABEN ARGMAG

FP

PL

GMR

SCR

MACAU HIGH

25 Km0

FZB

BOA VISTA HIGHBOA VISTA HIGH

GROSSOS LOW

FSJ

BAL

PX

LPXLOR

ALC

Stratigraphy

RIFT: clastics andvolcanics

TRANSITIONAL

DRIFT

carbonates

clastic

*volcanics

Araripe & Feijó, 1994

Source and Reservoir:

Pendência Formation

Source and Reservoir:

Alagamar Formation

Principal Reservoir:

Açú Formation

Structural Map andprincipal fields

A-A` Onshore Geological Section

A A`NW SE

Residual Bouguer Anomaly Map of Potiguar Basin

Mapa da Anomalia Bouguer ResidualResidual obtido por subtração do grid de Bouguernormal com o grid de continuação a 500m mais filtragem na banda de 1 a 8km de comprimento

Superintendência de Gestão e Obtenção de Dados Técnicos - SDT

POTIGUAR BASIN

Setor e Blocos da 9a. Rodada

Faz.BelémField

Blocks ofRound 9

SetorSPOT-T-1B

CERN

Sedimentary basin

Shore line

N

SECTOR

SPOT-T-1B

N

RN

CE

Sedimentary basin

Blocks ofRound 9

Magnetic Anomaly Map(Total Field) of Potiguar Basin

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Infrastructure– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Exploratory Informations– Final Remarks

Petroleum System

Source and Reservoir:

Pendência Formation

Source and Reservoir:

Alagamar Formation

Principal Reservoir:

Açú Formation

Petroleum System

• Source Shales of Pendência (neocomian) and Alagamar (aptian) Formations

• ReservoirsFluvio-deltaic sandstones of Açu (albian/ cenomanian) and Alagamar Formations and turbidites of Pendência Formation

• SealsOverlapped or interbeded shales or calcilutites

• TrapsStratigraphic, structural or mixed

• MigrationFault plans or direct contact between source and reservoir

Petroleum System

Chart of Events

• Principal Systems:

Pendência (!) +

Alagamar - Açu (!)

Modified from DPC & Assoc., 2000

Petroleum System

• Quality of reservoir rocks

Rift Sequence (Pendência Formation): Ø = 18-24%Mean K = 75mD

Transitional Sequence (Alagamar Formation): Ø = 12%Mean K = 50mD

Drift Sequence (Açu Formation): Ø = 19-30%K = 200-5.000mD

Relative Distribution of Oil

• Drift Sequence (Açu Formation) - 85%

• Rift Sequence (Pendência Formation) - 10%

• Transitional Sequence (Alagamar Formation) - 5%

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Infrastructure– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Exploratory Infomations– Final Remarks

Oil and Gas Fields

Limite de migraçãodo óleo Alagamar

Fazenda BelémPescada e Arabaiana

Ubarana

Canto do Amaro

Alto do Rodrigues

Estreito

Fazenda Pocinho

Fonte: Petrobras

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Infrastructure– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Exploratory Informations– Final Remarks

Models of plays –Pendência Formation

Transverse section to the Rift withlocation of the principal fields on the

Pendência Formation

Example: Serraria Field

Rift System

Modified from Bertani et al., 1989

Play Model: Transitional and Drift System

Examples: Canto do Amaro and Ponta do Mel FieldsModified from Bertani et al., 1989

Fazenda Belém Field:Map of top of principal reservoir

Source:Petrobras

Geological Section of Fazenda Belém Field

Source: Petrobras

Fazenda Belém Field: General data and reserves

• Fazenda Belém - Volume in place:Oil: 536.20 MM barrels

Gas: 15.54 Bcf

• Fazenda Belém -- Volume in place:Oil: 536.20 MM barrels

Gas: 15.54 Bcf • Fazenda Belém – Reserves:

Oil: 5.30 MM barrels

• Fazenda Belém – Reserves:Oil: 5.30 MM barrels

• Fazenda Belém – General data:Contract Area: 336 Km2

Accumulation Area: about 90 Km2

API: 14o

Permeability: 5,000 mDPorosity: 25%

• Fazenda Belém – General data:Contract Area: 336 Km2

Accumulation Area: about 90 Km2

API: 14o

Permeability: 5,000 mDPorosity: 25%

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Exploratory Informations– Final Remarks

Offered sector

• SETOR SPOT-T-1B20 exploration

blocksAverage area

of blocks: 29 km2

Total Area: 573.42 km2

• SETOR SPOT-T-1B20 exploration

blocksAverage area

of blocks: 29 km2

Total Area: 573.42 km2

Data package:Seismic 2D - 731 Km

Data package:30 wells

Data package:2D Seismic and wells

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Infrastructure– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Exploratory Informations– Final Remarks

Exploratory Informations

R$ 17,000 to R$ 46,000Minimum Bonnus

Açu Formation (Albian-Cenomanian)Minimum Target

C

2+1 years

3 years

573.42 km²

20

Mature Basin

SPOT-T1B

Operator Qualification

Exploratory Period

Exploration Phase

Total Bid Area

Number of Blocks

Exploratory Class

Sector Name

Presentation

– Location, Area and Geological Boundaries– Exploration Review– Infrastructure– Geology– Petroleum System– Oil and Gas Fields– Types of Plays and Fields– Offered Sector– Minimum Exploration Program (PEM)– Final Remarks

Final Remarks

• The twenty offered exploratory blocks are very interesting due to its proximity from the Fazenda Belém Field.

• The Fazenda Belém Field has been producing since june of 1980, and yields presently about 1,905 barrels of oil per day (14º API) in shallow wells from 300 to 500 meters depth.

• ANP estimates that the twenty offered blocks could have a potential reserves around 15 MM barrels of oil similar to theFazenda Belém accumulation.

ThanksThanks !!