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R i M d li f W b AReservoir Modeling for Wabamun Area CO2 Sequestration Project (WASP)
Davood NowrooziDon LawtonDon Lawton
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Effect of production/injection on G h i lGeophysical parameters
• Production or injection makes change in fluidProduction or injection makes change in fluid parameters as saturation and pressure and they cause changes in wave velocities and y gamplitude
• Geomechanical changes in a reservoir can make new fractures or physical movement inmake new fractures or physical movement in reservoir formations (collapse/swell is detectable if within seismic resolution).)
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Research stepsResearch steps
• Reservoir simulation• Reservoir simulation• Prediction of plume fate and dynamic
parameters in a real reservoirparameters in a real reservoir• Seismic modeling for each separate part
(cell) of reservoir considering changes in(cell) of reservoir considering changes indynamic parameters
• Predicting geophysical behavior of whole• Predicting geophysical behavior of wholereservoir considering injection orproductionproduction
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Work FlowchartWork Flowchart
• Gathering geological, petrophysical andg g g , p p yreservoir data
• Create geo model files for simulation• Schedule for production or injection• Choosing suitable simulator (Black oil or
C iti l)Compositional)• Simulation
D l d i t f i i• Develop dynamic parameters for seismicmodeling and interpretation
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Reservoir simulationReservoir simulation
• A numerical modeling method thatA numerical modeling method thatinterprets physical phenomena for discretecells in reservoir extending in:cells in reservoir, extending in:
(a) time(b)(b) space
• The equation is solved for each cell andeach time step (combination of thematerial balance and Darcy’s law)
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Simulators Function ofSimulators
Black-oil Simulators
Function of Pressure ,
Isothermal, Fast, Inexpensive
•Three-phases (oil, gas, and water)•Three components (oil, gas, and water)•All fluid properties are functions of pressureSuitable for cases with recovery mechanics not sensitive to composition changes in the reservoir fluids such as primary recovery, solution gas drive, gravity , drainage, gas cap expansion, water drive, water injection and gas injection without mass transfer M l i hM l i hinjection without mass transfer
Compositional simulatorMulti component and multi phase reservoir simulators based on EOS modeling
Multi phase, Complicated,
Expensive
Multi-component and multi-phase reservoir simulators based on EOS modeling.Suitable for cases sensitive to compositional change in reservoir fluids such as primary depletion of volatile oil, gas condensate reservoirs and pressure maintenance in such reservoirs. In addition multiple contact miscible gas a te a ce suc ese o s add t o u t p e co tact sc b e gasinjection, CO2 and N2 injection
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Reservoir SimulationReservoir Simulation
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Requirements for effective storageRequirements for effective storage
• Capacity or Porosity of reservoirCapacity or Porosity of reservoir, • Injectivity or Permeability of reservoir
l d l d• A secure volume or good cap-seal condition
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WASP Project areaWASP Project area
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Wabamun projectWabamun project
• Area ~ 5030 Km2Area 5030 Km2
• Aquifer : Nisku formation – Dolomite• Cap: Calmar – Dolomitic shaleCap: Calmar Dolomitic shale• Data sources for creating geomodel: 79 well logs, 13
core data, 199 2D seismic line, 22 Drill stem testcore data, 199 2D seismic line, 22 Drill stem test(DST) and mineralogy data (C.L. Eisinger et al., 2009)
• No of Cells: 193*122*30 (over 706380 cells)( )• Cell size :500*500*(2-6)m
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Injection planInjection plan
• Injection schedule :No of injectors (Wells) : 10Injection schedule :No of injectors (Wells) : 10• Bottom hole pressure: 40 MPa (constant)
j i d i 0• Injection duration: 50 years
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Stratigraphy around the Nisku aquiferStratigraphy around the Nisku aquifer
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Injection l
Simulation lgoal
• 20Mt/year storage
goal
• Capacity for CO2 on the20Mt/year storage capacity for all the wells
• Capacity for CO2 on the present schedule
• Distribution of pressureTotal one Gt for 50 years
Distribution of pressure and Gas Saturation in reservoir
• Distribution of reservoir parameters after discontinuing injection
• Create usable output for 4D and AVO models
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Relative permeabilityRelative permeability
0 9
1
0 6
0.7
0.8
0.9
eabi
lity
0.4
0.5
0.6
tive
Perm
e
KrgKrw
0.1
0.2
0.3
Rela
t
00 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Gas Saturation
G W t l ti bilit di f Ni kGas-Water relative permeability diagram for Niskuacquifer (WASP area) (Bennion and Bachu, 2005 )
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Total gas injection volume and portion of free gas phase and solution gas
ubic
met
erSt
anda
rd C
uVo
lum
e –
SV
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Year
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Porosity map in different horizonsPorosity map in different horizons1 5 10 15 20
25 30
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Pore Volume at reference conditionsPore Volume at reference conditions1 5 10 15 20
25 30
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Permeability mapPermeability map
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Z permeability in 30 horizonsZ permeability in 30 horizons
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Gas saturation map, 50 years after injectioninjection
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and 100 years after injectionand 100 years after injection
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Gas saturation in well8 (XZ section) in d50 and 100 years
50 years 100 years
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Gas Saturation change for 100 ( i i )years(Animation)
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Pressure change during injectionPressure change during injection
2 years 10 years2 years 10 years
25 years 50 years
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Pressure change after injection in wellsPressure change after injection in wellsur
e M
PaPr
essu
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Calendar Years
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Pressure change in reservoir during i j ti (A i ti )injection (Animation)
Pressure Mpa
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CO2 CapacityCO2 Capacity
WellCumulative injection
(Billion sm^3)Cumulative injection
(Million Ton)Portion of each well
Total Field 132 244 100.0
W1 17 32 13.2
W2 12 23 9.5
W3 6 12 4.9
W4 11 20 8 0W4 11 20 8.0
W5 15 27 11.1
W6 8 15 6.3
W7 11 20 8.2
W8 22 41 16.9
W9 12 23 9.4
W10 16 30 12.4Reservoir modeling - WASP area 27
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ConclusionsConclusions
• Current schedule can inject 25% of CO2 thatCurrent schedule can inject 25% of CO2 that power plants produce
• Pressure transmission is faster than gas phase• Pressure transmission is faster than gas phase and affected the whole reservoir
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Next stepsNext steps
• Check other injection scenariosj• Integrating reservoir data for create
geophysical model for each cell and make ageophysical model for each cell , and make a synthetic model for whole reservoir
• Reservoir geomechanical study and numerical• Reservoir geomechanical study and numerical time lapse geophysical monitoring
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AcknowledgmentsAcknowledgments
• Dr. D.C. Lawtond h• Dr. H. Hassanzadeh
• Dr. S.A. Ghaderi• CREWES Team and sponsors• Schlumberger for software (Petrel andSchlumberger for software (Petrel and
ECLIPSE)
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