Bjørn-Ove Heimsund Erlend Øian Geir Terje...
Transcript of Bjørn-Ove Heimsund Erlend Øian Geir Terje...
CIPR in-house reservoir simulation activities
Bjørn-Ove Heimsund Erlend Øian Geir Terje Eigestad
H. Dahle M. Espedal G. Fladmark H. Hægland I. Aavatsmark . . .
Centre for Integrated Petroleum Research / Department of Mathematics
University of Bergen
November 1, 2005
CO2 relevance in NorwayPast simulation activities
Current simulation activities
Declaration of the newly elected Norwegian governmentOctober 19, 2005
Norway shall become a world leader in environmentallyfriendly use of natural gas . . .
. . . we will provide the necessary means for cleaning andtransporting of CO2 . . .
The government will make sure that a full-scale cleaning sitefor CO2 removal is established at Kårstø, and we willcontribute economically to this . . .
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
"Environmental lighthouse of Norway"1
Unconfirmed governmental intentions:
A governmental company will be founded which is to be incharge of creating a chain of value for transport and injectionof CO2.
I Aims to combine environmental effort and enhanced oil recovery.
I Large scale implementation from 2009?
1Ukeavisen 14.10.05Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
LGRBlack-oil simulationCO2 applications
Past activities
I Local grid refinement:I Fast saturation solver using characteristicsI High resolution saturation resultsI Parallelization
I Black-oil simulationI Implicit discretisationsI Unstructured grids
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
LGRBlack-oil simulationCO2 applications
Local grid refinement
I Modified method of characteristics:I Uses corrected operator splitting
on the Buckley-Leverett equationI Allows long time steps
I Adaptive local grid refinements wereused to capture the front
I Two phase incompressible flows
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
LGRBlack-oil simulationCO2 applications
Black-oil simulation
I Secondary oil migration (SOM)black-oil simulator:
I Developed at Norsk HydroI Transfered to UiB (ATHENA)I Sequential IMPEM formulation
I Extensions made at UiB:I Implicit mass treatmentI MPFA discretisationI Static local grid refinementsI Parallelization
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
LGRBlack-oil simulationCO2 applications
CO2 applications
I The ATHENA reservoir simulator hasbeen coupled with the ACCRETE
geochemical simulatorI ACCRETE:
I Calculates the mineralizationprocess by equilibriumthermodynamics
I Reduces the porosity
I ATHENA calculates pressure andadvects particles
I Applied on the Utsira formation
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
Discretisation on unstructured gridsDomain decompositionTarget applications
Current activities
I Combine previous codes/knowledge into a single simulator with aflexible core:
I Different grids and discretisationsI Different fluid systemsI Parallel and sequential
I Discretisation on unstructured grids:I Control volume methods (MPFA)I Streamline generation
I Domain decomposition
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
Discretisation on unstructured gridsDomain decompositionTarget applications
Control volume discretisation on unstructured grids
I The grid structure is alwaysconforming:
I TPFA based on connectionsI MPFA based on corners
I Import filter convert faulted cornerpoint grids to the conforming format
I This yields cells with co-planar“corner-points”
t
HH
H
tt
t
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
Discretisation on unstructured gridsDomain decompositionTarget applications
Example of grid handling
I Two phase flow on a highly skewed and anisotropic grid
I The simulator handles general grids with minimized gridorientation effects
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
Discretisation on unstructured gridsDomain decompositionTarget applications
Unstructured grid with sealing fractures
I Quarter of a five spot
I Low-permeablefractures
I Grid andtransmissibilities fromMohammadKarimi-Fard
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
Discretisation on unstructured gridsDomain decompositionTarget applications
Streamlines
I Fully realistic fieldsimulation grid
I Handling of arbitrarygeometries
I Improved velocityinterpolation
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
Discretisation on unstructured gridsDomain decompositionTarget applications
Domain decomposition
Ω1 Ω2
Ω3 Ω4
Ω1 Ω2
Ω3 Ω4
I The global domain Ω is split into disjoint subdomains Ωi
I Pressure is solved on the overlapping subdomains Ωi
I Masses are solved on the non-overlapping subdomains Ωi
I Pressure solver can be accelerated by a coarse mesh
I Can be an efficient parallelization of IMPES black-oil simulators
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities
CO2 relevance in NorwayPast simulation activities
Current simulation activities
Discretisation on unstructured gridsDomain decompositionTarget applications
Target applications
I Validation of Fault Facies models:I Requires faulted gridsI Upscaling and fracturesI Multi-point fluxes necessary
I Study flow of compressible fluids inlarge fields:
I Use of streamlinesI Domain decompositionI Multiscale simulation
I Coupled geochemistry /geomechanical / flow simulation
Bjørn-Ove Heimsund, Erlend Øian, Geir Terje Eigestad CIPR in-house reservoir simulation activities