brazil 9 round pará-maranhão basin -...

Brazil 9th Round

Pará-Maranhão Basin

Kátia da Silva Duarte, DSc. - GeologistANP Bid Areas Department


LocationGeological AspectsPetroleum SystemsExploration Efforts and Results9th Round SectorsAvailable DataFinal Remarks

LocationPará-Maranhão Basin

Operator Companies Pará-Maranhão Basin

Stratigraphic ColumnPará-Maranhão Basin

Canárias Gr.

Caju Gr.

Travosas Fm.

Ilha deSantana Fm.

Areinhas Fm.

Regional Seismic SectionPará-Maranhão Basin

Canárias Gr. APT-ALB

Caju Gr. ALB-CEN

Travosas Fm. CEN-QUAT

Ilha de Santana Fm. CAMP-QUAT

Regional Geologic SectionPará-Maranhão Basin

Source: PETROBRAS

Geologic SectionPará-Maranhão Basin

Structural MapPará-Maranhão Basin

Ilha de SantanaPlatform

E-W Faults

NW-SE Faults

Magnetic MapPará-Maranhão Basin

Bouguer MapPará-Maranhão Basin

Source RocksPará-Maranhão Basin

Caju Gr.

Travosas Fm.

Canárias Gr.

Travosas Fm. Shale Transgressive SequenceTOC - 0,5 a 1,7%

Caju Gr. Black shaleTransitional SequenceTOC - 1 a 2% (until 5 %)

Canárias Gr. Rift shale TOC - 1 a 4 %

MigrationPará-Maranhão Basin

Listric faults in the Transitional sequence and passive margin

Planar faults in the rift sequence

Direct contact between source and reservoir

ReservoirsPará-Maranhão Basin

Travosas Fm.

Canárias Gr.

Ilha de Santana Fm.

Travosas Fm.Tertiary turbiditic sands(distal portions) and Late Cretaceous (proximalportions)

Ilha de Santana Fm. Fractured carbonates,banks, reefs, talus depositsand Tertiary calci-turbidites

Canárias Gr. Fluvio-deltaic sands of the Rift phase

Cap RocksPará-Maranhão Basin

Calcilutite

Shale

Marl

• Calcilutite• Shale• Marl

StructuresPará-Maranhão Basin

TrapsPará-Maranhão Basin

• Structural• Stratigraphic • Mixed• Paleogeomorphic

Petroleum SystemsPará-Maranhão Basin

Proven Petroleum Systems

• Travosas Fm. - Ilha de Santana Fm.

• 1-PAS-11 - oil 40 - 44º API - fractured limestone

• Travosas Fm. - Travosas Fm.

• 1-MAS-16 - API not measured - sandstones

Speculative Petroleum Systems

• Caju Gr. - Travosas Fm.

• Canárias Gr. - Canárias Gr.

PlaysPará-Maranhão Basin

• Banks, reefs developed above tectonic or depositional paleo-elevations of Ilha de Santana Fm.

• Fractured limestone in the Ilha de Santana Fm.

• Gravitational deposits and turbidites from Ilha de Santana Fm.

• Rollover structures related to listric faults, disturbing deposits in the Ilha de Santana Fm.

PlaysPará-Maranhão Basin

Prospectstested in growth faults

Prospects related to growth faults: 1 PAS 9 - (1979 / WD 70m) - 38° API oil discovery 1PAS 11 - (1981 / WD 67m) - 40 - 44° API oil field discovery1MAS 16 - (1982 / WD 70m) - Not measured API oil discovery1MAS 19 - (1982 / WD 59m) - Gas discovery

WD = water depth

Regional Geologic Section

Source: PETROBRAS

Tested ProspectsPará-Maranhão Basin

Folds:1-PAS-21 - (1984 / WD 70m) - Oil and gas discovery (calcarenite and marl)1-MAS-5 - (1978 / WD 51m) - 34° API oil and gas discovery

Turbidite sands:1-MAS-17 - (1983 / WD 56m) - 37° API oil and gas discovery1-MAS-11 - (1979 / WD 65m) - 27- 41,5° API oil and gas discovery

WD = water depth

Drilled wells by yearPará-Maranhão Basin

0

1

2

3

4

5

6

7

8

amou

nt o

f wel

ls

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

Adjacent wildcat

Extension

Wildcat

2 wildcats1-MAS-51-MAS-8

1-PAS-11

1-PAS-9

29 Wells (27 wildcat, 1 extension, 1 adjacent wildcat)

1-PAS-23

1-MAS-161-MAS-171-MAS-19

Most important resultPará-Maranhão Basin

1981 - 1-PAS-11First oil and gas production

Seismic Line in the 1-PAS-11 area

1-PAS-11Pará-Maranhão Basin

This line is included in the data package of the 9th Round(222-644)

1-PAS-11Pará-Maranhão Basin

This line is included in the data package of the 9th Round

1-PAS-11 Conclusive Tests

Production Test-02 (4289-4298m)

40°API Oil Producer Interval

Non common high pressure

Qo= 820 bbl/day (ABT=20/64”)

GOR=2600 scf/bbl

Regular Permeability

High Damage

Possibly without depletion

at 3400m: gas 2000 UGT / 1300 UGP

Gas detector

Formation Test -2A (4273-4303m)

Qo= 830 bbl/day (ABT=20/64”)

GOR=4800 scf/bbl

Good Permeability

Very high damage

Non common high pressure

42°API Oil Producer Interval

GOR= Gas Oil Ratio

Guimarães, P. T. et. al., 1989* Duarte, K.

1-PAS-11 General data

• Discovery: 10/28/81 Bathymetry: 67 m • Reservoir Rocks: Fractured Eocene calcarenites• Depth: 4,280-4,320 m • Fluid Oil/Condensate: 40º - 44º API• HC in place volume: 2.5 MM bbl of oil

7.2 Bcf of gas• Cumulative production (until Sep/84):

420 Mbbl of oil/condensate1.8 Bcf of gas

Offered AreasSPAMA-AR1


Sector SPAMA-AR1Classification New FrontierNumber of Blocks 40Offered Area (km²) 7692.9Exploration Period (year) 6 (5+1)Operator Technical Qualification BBlock Area (km²) 170Minimum depth Travosas Fm. (Ks)



Sector SPAMA-AR2Classification New FrontierNumber of Blocks 10Offered Area (km²) 1923.29Exploration Period (year) 6 (5+1)Operator Technical Qualification BBlock Area (km²) 170Minimum depth Travosas Fm. (Ks)

Data PackageSeismic

Available Data BDEP

Data PackageWells

Reserves Estimation

A simplified evaluation using few seismic lines of the area allows us:

• to identify 14 leads with areas changing from 10 and 170 km².

• considering geological and petrophysical aspects from wells drilled in the area, it was estimated minimum potential reserves of 203 millions bbl of oil and 16 billion m³ of gas in those leads.

Final Remarks


• The sectors are near the state capital cities, Belém and São Luís, both with important harbors.

• The petroleum systems are already proven in the shallow water sectors.

• This basin (95,875 km2 until water depth of 3,000 m) is relatively unexplored (1 well per 3,306 km2).

• There was commercial production in this basin. The well 1-PAS-11 has produced light oil and gas near the boundary of PAMA-M-188 and PAMA-M-222 blocks.

Thank you

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