Monte Alegre Formation

Brazil Round 10
Amazonas Basin
Geologists Andrei Dignart and Juliana Ribeiro Vieira
Bid Areas Department
Purus Arch
Location
Manaus
Modified from Gonzaga et al., 2000
Basin area: 606,234 km2
Paleozoic Intracratonic basin
Covered by Meso-Cenozoic strata
Sedimentary
Infill
Modified from Gonzaga et al., 2000
Infrastructure
Infrastructure
Mauá Thermoeletric Plant
Location: Manaus
Power: 136 MW
Manaus
Infrastructure
Investments
http://www.dnit.gov.br/noticias/pacnorte
Federal Government of Brazil will invest
around US$
US$ 3.2 billion in the
transportation sector (2007 - 2010
2010))
Exploration
History
Exploration History
Petroleum exploration in the Amazonas Basin started in 1917
1917. It was carried out by the
Brazilian Geological and Mineralogical Service (SGMB) - in this time the focus was coal
exploration.
In 1925
1925, the first oil and gas shows occurred near the Itaituba city.
In 1953
1953,, Petrobras was created.
The exploratoy efforts in Amazonas Basin can be divided into three phases:
Phase 1
1953 - 1967
Phase 2
1971 - 1990
Phase 3
Since 1999
53 stratigraphic wells and 58 wildcat wells were drilled.
Results: sub-commercial discoveries in the Nova Olinda reservoirs
(1-NO-1, 1-NO-3 e 1-NO-4-AM) and some wells with oil/gas shows.
Petrobras improved seismic method and 36 wells were drilled.
Results: two discoveries: 1-LT-1-AM (Lago Tucunaré) and 1-ICA-1-AM
(Igarapé Cuia).
After the creation of the ANP, in 1999, Petrobras discovered gas in
the well 1-RUT-1-AM which resulted in the fields nowadays under
development, Azulão and Japiim.
Exploratory
Activities
Exploratory Activities
post-stack 2D Seismic
postpre--stack 2D Seismic
pre
212 wells:
wells:
107 wildcats and
61 stratigraphics
36 specials
37,958 km of 2D
seismic 2D and
210 km² of 3D
seismic
934,537 km² of grav/
grav/mag
Bouguer
Gravimetric Map
mGal
24.4
17.6
12.5
9.0
4.2
- 0.5
- 5.4
- 10.5
- 15.3
- 24.4
Magnetic Anomaly Map
nT
23.8
13.2
4.3
- 4.4
-13.7
- 32.6
Aerogeophysical Project
ANP/2007--2008
ANP/2007
Covered area
area:: 591
591,,957.
957.7 km²
Flight height
height:: 1,400 - 1,800 m
Flight spacing line : 6 km (E
(E--W)
Concluded
Ongoing
Seismic Reprocessing
ANP/2005
Lot 3
Location: Northern
Basin Sector
reprocessed 2D 2D
2D seismic :
6,414 km
217,581 registers
Seismic Reprocessing
ANP/2005
1-RUT-1-AM
Before
After
Seismic Reprocessing
ANP/2005
Before
After
TectonoTectonoStratigraphic
Evolution
Tectono--Stratigraphic
Tectono
Evolution
Cretaceous--Tertiary Magasequence
Cretaceous
Alter do Chão, Solimões and Uçá formations
Sedimentation: continental (fluvial and lacustrine)
Juruá tectonic event
Magmatic event
Gondwanide Orogeny (260 Ma)
Carboniferous--Permian Megasequence
Carboniferous
Tapajós Group –Monte Alegre, Itaituba, Nova Olinda and
Andirá Formations
Sedimentation : continental and restrict marine
Devonian--Carboniferous
Devonian
EohercynianMegasequence
Orogeny (330 Ma)
Urapadi and Curuá Groups–
Groups–Maecuru,
Maecuru, Ererê,
Ererê, Curiri,
Curiri, Oriximiná
and Faro Formations
Sedimentation : fluvialfluvial-deltaic,
deltaic, neritic and glacial marine
Caledonian Orogeny (400 Ma)
Ordovician--Devonian Megasequence
Ordovician
Trombetas Group – AutásAutás-Mirim,
Mirim, Nhamundá.
Nhamundá. Pitinga and
Manacapuru Formations
Sedimentation : marine clastics
PROTEROZOIC
Purus Group – Prosperança and Acari Formation
Petroleum System
Petroleum System
Source Rock
DEVONIAN
DEVONIAN
(Frasnian
Frasnian))
radioactive black shales
(Barreirinha Formation)
TOC: 2 to 5%
(S2) ~ 15mgHC/gRock
Organic Matter type II
(anoxic marine environment)
SILURIAN
SILURIAN
(Landoverian
Landoverian--Wenlockian)
Wenlockian)
radioactive black shales
(Pitinga Formation)
TOC < 2%
(S2) ~ 4 mgHC/gRock
Organic Matter type II
Schematic Stratigraphic Chart, P.R.C Cunha et al., 1993
(marine environment)
Petroleum System
Source Rock
Isopach map of Barrerinha Formation
Thickness in meters
Contour Interval = 20 m
Modified from Gonzaga et al., 2000
Source Rock:
TOC
Legenda
COT(%)
0,4
1,8
3,0
4,2
0,6
2,0
3,2
4,4
0,8
2,2
3,4
4,6
1,0
2,4
3,6
4,8
1,2
2,6
3,8
5,0
1,4
2,8
4,0
5,2
1,6
Blocos Ofertados - Rodada 10
Campos em Desenvolvimento
Source: Gomes, 2008
Source Rock:
Hydrogen index
Legend
Hydrogen Index mgHC/gCOT
20
140
240
40
160
260
60
180
280
80
200
300
100
220
320
120
Blocos Ofertados - Rodada 10
Campos em Desenvolvimento
Source: Gomes, 2008
Source Rock:
Source Potencial
Legend
Source Potencial kg HC/t rocha
1
8
14
2
9
15
3
10
16
4
11
17
5
12
18
6
13
19
7
Blocos Ofertados - Rodada 10
Campos em Desenvolvimento
Source: Gomes, 2008
Thermal Maturity
Modified from Gonzaga et al., 2000
Maturity
%Ro < 0.6
0.6 < %Ro
%Ro < 1.35
%Ro < 1.35
%Ro > 1.35
The Ro data show that thermal evolution is mainly controlled by the burial
history in the trough area
Thermal effect of igneous intrusions played an important role only where
dykes and sills are hosted on source rock
The intrusions effect is dominant in the eastern Amazonas Basin
Petroleum System
CARBONIFEROUS
Reservoirs
CARBONIFEROUS RESERVOIRS
(Nova Olinda Formation)
Island bars/
bars/eolian
Nova Olinda Formation
Monte Alegre Formation
CARBONIFEROUS
RESERVOIRS
(Monte Alegre Formation)
DEVONIAN
Eolian
Curiri Formation
DEVONIAN RESERVOIRS
(Curiri Formation)
Glacial/Marine
Schematic Stratigraphic Chart, P.R.C Cunha et al., 1993
Nova Olinda
Reservoirs
1-RUTRUT-00010001-AM
Curiri and Monte Alegre
Reservoirs
CarboniferousEo
lian
Sandstones
Devonian
glacial/marine
sandstones
Modified from Gonzaga et al., 2000
Petroleum System
DEVONIAN
Seals
Seals for Nova Olinda reservoirs
= Nova Olinda Evaporites
Nova Olinda Formation
CARBONIFEROUS
Itaituba Formation
Curiri Formation
Schematic Stratigraphic Chart, P.R.C Cunha et al., 1993
Seals for Monte Alegre reservoir =
Carbonatos Fm. Itaituba
Seals for Curiri reservoir =
shales and diamictites
Petroleum System
Traps
Structural Traps
Asymmetric Anticlines
Horst Structure
Anticlines Related to Reverse Faults
Shear Tectonic Reactivation
Stratigraphic Traps
Pinch-out
Paleogeomorphic
Source: www.bcartifacts.50megs.com
Events Chart
Tertiary
Tectonics
Cretaceous
Uplift
Magmatism
Modified from Gonzaga et al., 2000
Fields under
Development
Location map
JAPIIM
AZULÃO
Azulão Field
(1999)
Area: 21 km²
1-BRSABRSA-126
126--AM
VGIP = 5 BCM
Reservoirs: Nova Olinda
sandstones (Carboniferous)
Fluid: gas + condensate
1-RUTRUT-00010001-AM
Depth: - 1,560 m
Ø = 20 - 22%
K = 300 mD
Azulão Field
1-RUT-1-AM
Top Paleozoic
Sill
Top Reservoir
Top Monte Alegre Formation
Top Barreirinha Formation
(1999)
Azulão Field:
Nova Olinda Reservoirs
Top Nova Olinda Reservoirs: time structural map
Japiim Field (2001)
1-BRSABRSA-9898-AM
VGIP = 661 MMCM
3-BRSA
BRSA--170
170--AM
Area: 12.2 km²
Reservoirs: Nova Olinda
sandstones (Carboniferous)
Fluid: non
non--associated gas
Depth: - 1,470 m
Ø = 19 - 22%
K = 50 - 60 mD
Japiim Field
1-BRSA
BRSA--9898-AM
1-BRSABRSA-9898-AM
Top Paleozoic
Top Sill
Base Sill
Top Nova Olinda Reservoir
Top Barreirinha Formation
Linha 02540254-RL
RL--155
Offered Sector
Offered Blocks
JAPIIM
AZULÃO
7 blocks
Total offered area:
13,338 km²
Data Package
Wells: 20
Seismic:: 3,973 km 2D public postSeismic
post-stack
210 km² 3D public postpost-stack
Exploratory Opportunity
AM
AM--T-63
Top Nova Olinda Reservoir
Line 0105
0105--115
Exploratory Opportunity
AM
AM--T-85
Top Nova Olinda Reservoir
Top Nova Olinda Reservoirs: time structural map
Top Nova Olinda Reservoirs: time structural map
Volume Estimation
Variables for Volume Estimation:
Estimation:
Sw = 25%
Ø = 20%
Bg = 0.005
Lead
Block AMAM-T-63
VGIP = 1,5 BCM
Lead
Block AMAM-T-62
VGIP = 17,1 BCM
Lead
Block AMAM-T-82
VGIP = 6,9 BCM
Lead
Block AMAM-T-83 e 84
VGIP = 35,4 BCM
Lead
Block AMAM-T-85
VGIP = 20,9 BCM
Minimum Exploratory
Program
Sector
SAM--O
SAM
Exploratory class
New Frontier
Number of blocks
7
Total bidding area
13,338 km²
Exploration phase
6 years
Exploratory periods
Operator qualification
4 + 2 years
B
Minimum bonus
R$ 83,750.00 to R$ 185,000.00
Minimum depth
Monte Alegre Formation
(Carboniferous)
Final Remarks
Final Remarks
The gas pipeline Urucu
Urucu--Coari
Coari--Manaus is expected to
start operation in September, 2009
2009..
The Manaus (capital of the Amazon State) electricity
demand grows about 8% a year, mainly because of
the industrial sector, which is responsible for 43
43%
% of
this necessity
necessity..
In 2006
2006,, a treaty was signed between Eletrobrás,
Eletronorte, Manaus Energy and Cigás to support
new thermoelectric power plants and change the
energy matrix from oil to natural gas.
gas.
Final Remarks
62% of the wells already drilled in the basin show
62%
evidences of oil and/or gas
gas..
The offered blocks are near Japiim and Azulão
gas fields
fields..
The main petroleum system Barreirinha - Nova
Olinda is similar to Solimões Basin (Urucu
Complex)..
Complex)
There are 11 possible exploratory opportunities
already mapped in the Nova Olinda play.
play.
Final Remarks
Considering the 11 opportunities
already mapped, ANP estimates
around 72 BCM of gas in the
offered area
Andrei Dignart
adignart@anp.gov.br
Juliana Vieira
jrvieira@anp.gov.br
www.brasil--rounds.gov.br
www.brasil