Play Fairway Analysis and

Petroleum System Modeling

Bernard CollettaExploration Project Director

Objectives• Promote further exploration of the

Nova Scotia margin– Better understanding of the geology of

the offshore domain– New evaluation of the petroleum

potential– Improve data quality

DeliverablesMAPS

Interpreted seismic sections

Well log interpretation

“Lithology” interpreted sections

Salt

Sand

Shale

3D depositional environment

1D +2D +3D Petroleum system modeling

CRS Maps

• Atlas (paper and digital format) of the Nova Scotia margin including: – Stratigraphic models– Structural maps– Gross Depositional Environment maps– Petroleum System Modeling results

• Common Risk Segment Map• Yet to find

Progress of the PFA project

PFA

Seismic reprocessing GXT

Seismic reprocessing TGS

Seismic data

Salt structuration

Geochemistry

Biostratigraphy

Sedimentology

Plate tectonics

Progress of the PFA project

PFA

Seismic reprocessing GXT

Seismic reprocessing TGS

Seismic data

Salt structuration

Geochemistry

Biostratigraphy

Sedimentology

Plate tectonics

Finished

Preliminary results

Main Tasks of the PFA project

Phase 1 : interpretation

Phase 2 : modeling

Petroleum system elements and processes

2480

120° F120° F

350° F350° FGenerationGeneration

MigrationMigration

Seal RockSeal Rock

ReservoirRockReservoirRock

OilOil

WaterWater

Gas CapGas Cap

EntrapmentEntrapment

AAPG document

50°C

180°C

Source RockSource Rock

PaleotemperatureBurial history

Source rocks

Reservoirs

Seals

Traps

Petroleum system event chart

1 2

400 300 200 100

Paleozoic Mesozoic Cenozoic

D M P P TR J K P N

Geologic Time-Scale

Petroleum System Events

Source RockReservoir RockSeal RockOverburdenTrap FormationGeneration, Migration,and Accumulation

PreservationCritical Moment1. Western North Slope

2. East-central North Slope

Bird, 1994Bird, 1994

North Slope, AlaskaNorth Slope, Alaska

Relative timing

Petroleum system workflowStratigraphic modeling

DIONISOS

TEMPERATURE

VITRINITE

Thermal/maturitycalibrationTEMIS 1D Source rock evaluation

TEMIS 3D

Drainage areasTEMIS 3D

HC migration efficiencyTEMIS 2D

Pressure calibration/predictionTEMIS 2D/3D

PRESSURE

0

200

400

600

800

1000

1200

1400

1600

1800

KX2-WL-CVX1 &2

KX2-F1B-S3 KX1 South channel West F1B West NK4/NK5

Expe

lled

Oil

(mill

ion

tons

)

Play ranking& uncertainties

TEMIS 3D, QUBS

Geological modelTEMIS 1D/2D/3D, CERES

Structural restoration

Seismic interpretation

Expelled HC

Risk maps

Stratigraphic model

CNSOPB

BiostratBiostratprojectproject

Ages of sequence boundaries ?

Ages of sequence boundaries ?Facies / deposition environment ?

Facies / deposition environment ?

Changes in stratigraphic chart ?

Changes in stratigraphic chart ?

Seismic interpretationSalt Salt tectonictectonic

ssprojectproject

Salt welds & feeders ?

Salt welds & feeders ?Initial salt thickness & pinch out ?

Initial salt thickness & pinch out ?

Early salt structures ?Early salt structures ?

Evolution through time of the NS MarginPlate Plate tectonictectonic

ssprojectproject

From Stampfli & Borel (2002).

Magnetic anomaly map

Crustal scale sectionFunck et al. 2004

History of the Atlantic opening ?

History of the Atlantic opening ?Significance of the ECMA ?

Significance of the ECMA ?

Crustal architecture?

Crustal architecture?

Reservoir and source rocks distributionSedimento.

project

Subsidence

Supply

DionisosSource(s) of sediments ?

Source(s) of sediments ?

Sedimentary facies in wells ?

Sedimentary facies in wells ?

Evolution through time?

Evolution through time?

Temperature and burial historyTEMPERATURE

VITRINITE

Apatite Apatite fission fission track track

projectproject Erosional or thermal events

Erosional or thermal events

2D burial evolution

Burial historyBurial history

Main questions to be answered

• What is the age of the different units recognized in the wells and on seismic lines?

• What is the role of the Jurassic salt in the structures and traps development?

• What is the evolution of the margin at crustal / lithospheric scale?

• Where are the reservoirs and sources rocks?

• What is the tectonic and thermal evolution of the Nova Scotia margin?

• ….

Integration of top world class academic research

into an industry exploration project

Academic Panel on Special Projects

Andrew MacRaeSaint Mary’s University

Steven IngsDalhousie University

Prof. Marcos ZentilliPGeo-NS