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» Fifth level Play Fairway Analysis Seminar - summary
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Synthetics/Data Conditioning/ base maps/reports and
wells
Play Fairway Analysis - Workflow
Bible Line Reprocessing
Sedimentology
PFA Project - BEICIP External Contractors Halifax academic/GSC
Source Rock identification and type
Thermal Evolution of basin
Oil typing from seeps and shows
Vitrinite Reflectance
Fluid Inclusions
Rock Eval
AFTA
Geochemistry Project
Bio Stratigraphy
Plate Tectonics Project
Seismic Reprocessing Refraction Line SISMAR Reprocess
Beaumont forward Model
GSC/Sibuet Reconstruction
Grav Mag Reprocessing
Plate Tectonics – 3D Basin Evolution Model
Louden Integ Interpretation
Seismic interpretation
Strat Model
GDE maps
CRS mapping
Petroleum systems
Volumes & Risks
Build database
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Database
• ~70000 km 2D • ~30000 sq km 3D • 20 key wells – Std Log suite • + ~90 other wells • Biostratigraphy data • Synthetic seismograms • Variable spatial distribution
11-11-22 4
Jurassic carbonate bank
Cretaceous
delta
Jurassic
delta
Deep offshore area Albatross-B13
Shelburne_G-29 Bonnet P-23
Shubenacadie_H-100
Glooscap_C-63
Cohasset_L-97
Alma_F-67 Glenelg_J-48
Chebucto_K-90
Evangeline_H-98
Newburn_H-23 Weymouth_A-45
Annapolis_G-24 Crimson_F-81
Tantallon_M-41
Dauntless_D-35 West Esperanto_B-78 Hesper_P-52
South_Griffin_J-13
Balvenie_B-79
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Summary
• Rifting History • Reservoir prediction • Geochemistry • 3D petroleum systems • Play maps & Yet To Find • Key messages • Risks (comments)
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Central Atlantic between FZ Pico-Gloria and 15°20’-Guinea. In red, ECMA and WACMA (Labails, 2007, thesis). In green, Mezozoic magnetic anomalies.
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Rifting model - KEY CONCLUSIONS
• Nova Scotia / Morocco are conjugate volcanic passive margins
• Sub-aerial spreading initiated by CAMP event in the Earliest Jurassic
• Salt basins confined to continental crust stretched in Late(?) Triassic
• Early post rift water depths < 200m (anoxic conditions - ? a new petroleum system)
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Reservoir de-risking
• Several major sediment entry points – Sable system – Mohican graben (clastic or calsi-turbidites) – Mohawk graben (clastic or calsi-turbidites) – Shelburne delta (newly identified)
• Reservoir presence & distribution can be de-risked – Understanding paleo slope morphology is key – 3D imaging – Shelf to slope attribute analysis
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Source rocks
S
S S
S
S
5 source rock intervals 2 major source rocks Tithonian mixed terrestrial/marine Pliensbachian restricted marine
Potential for rich petroleum systems
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Source Rocks Modeling – Transformation Ratio
TITHONIAN SR APTIAN SR
VALANGINIAN SR TITHONIAN SR CALLOVIAN SR
PLIENBACHIAN SR
% TRANSFORMATION
RATIO
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Pliensbachian Transformation ratio
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Barremian sands play (1)
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Albian sands play (1)
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Resource estimate Subzones defined on the basis of geological concept, and on exploration concerns. There is no wells drilled in Basin Zones (in blue). The limit with Platform Zones (in yellow-brown) is close to the isobath 2000 m.
Most of the discoveries are in the Zone 3
à ~ 120 TCF Gas à ~ 8 Bnbbls oil à Unrisked à In place
à ~ 3-5% of expelled HC
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0
5
10
15
20
25
30
35
ZONE 1 ZONE 3 ZONE 5 ZONE 6 ZONE 4 ZONE 2
14
35
27 26
16
4.2
GAS v
olum
e in Tcf (surfa
ce co
ndition
)
ZONE RANKING by GAS volume IN PLACEGRAND TOTAL (unrisked)
All Plays (in Tcf)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
ZONE 1 ZONE 3 ZONE 5 ZONE 6 ZONE 4 ZONE 2
0.5
1.4
1.8
1.10.9
0.1
GAS v
olum
e in Tcf / km
2(surface co
ndition
)
ZONE RANKING by GAS volume IN PLACEPER AREA (unrisked)All Plays (in Gcf / km2)
0
20
40
60
80
100
120
ZONE 1 ZONE 3 ZONE 5 ZONE 6 ZONE 4 ZONE 2
92
46
112
4554
25
GAS v
olum
e in 10
3bb
l / km
2(surface co
ndition
)
ZONE RANKING by OIL volume IN PLACEPER AREA (unrisked)
All Plays (in 103 bbl / km2)
0
500
1000
1500
2000
2500
ZONE 1 ZONE 3 ZONE 5 ZONE 6 ZONE 4 ZONE 2
2470
1130
1650
1090 990820
GAS v
olum
e in Mbb
l (surfa
ce co
ndition
)
ZONE RANKING by OIL volume IN PLACEGRAND TOTAL (unrisked)
All Plays (in Mbbl)
0
50
100
150
200
250
300
350
400
ZONE 1 ZONE 3 ZONE 5 ZONE 6 ZONE 4 ZONE 2
160
250
370
210180
40
GAS v
olum
e in 10
3bb
l / km
2(surface co
ndition
)
ZONE RANKING by OIL EQUIVALENT volume IN PLACE
PER AREA (unrisked)All Plays (in 103 bbl / km2)
0
1000
2000
3000
4000
5000
6000
7000
ZONE 1 ZONE 3 ZONE 5 ZONE 6 ZONE 4 ZONE 2
4400
63005500
5000
3300
1400
GAS v
olum
e in Mbb
l (surfa
ce co
ndition
)
ZONE RANKING by OIL EQUIVALENT volume IN PLACE
GRAND TOTAL (unrisked) All Plays (in Mbbl)
Ranking of the different zones
Zone 3 - 1/3 discovered mmbbls)
Oil
volu
me
in m
mbb
ls (s
urfa
ce c
ondi
tions
)
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Resource estimate – unrisked/in place
HC expelled from a deeper source rock
TRAP 2
TRAP 1
DRAINAGE AREA OF TRAP 1
DRAIN and PETPOT Concept
à 3D TEMIS petroleum systems approach
à Only simple closed structure (4 ways traps > 2 sq km)
à More complex traps not considered
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Tantallon
Hauterivian MFS depth map
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Shelburne
Albatross
Mohican Shuben Hauterivian MFS depth map
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Example lead volume
Key Assumptions
• Closed structure exists • P50 area = 40 km2
• P50 oil pay = 70 m
Unrisked OOIP
• Mean = 1.6 Billion Bbls
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Key messages
• Multiple proven petroleum systems – Several source rocks (terrestrial/marine) – & regional marine EJ
• Multiple reservoir possibilities – Major proven delta (Sable) – north – Clastic input along margin and south west – Carbonate bank
• Substantial resource (~120 TCF + 8 bnbbls) – ~3-5% of expelled hydrocarbons
• Potential for rich petroleum system • Multiple plays
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Risks
• Charge – Proven in East – Model risk in West (extent of EJ source)
• Reservoir – Extensive regional evidence for presence – Distribution - detailed seismic stratigraphy & attribute
analysis • Traps
– Multiple possibilities in shallow & deep water – Detailed structural mapping
• De-risking - 3D seismic
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