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Fundamental Concepts and Potential Applications of the Windowing Technique in Reservoir Simulation
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1995
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EngineeringDirect Numerical SimulationFluid MechanicsSimulation ModellingComputer ArchitectureSimulationFundamental ConceptsDiscrete-event SimulationReservoir EngineeringWindowing TechniqueNumerical SimulationBlock ModelSystems EngineeringModeling And SimulationParallel ComputingSimulation RunLarge-scale SimulationComputer ScienceReservoir SimulationGrid ApplicationReservoir ModelingCivil EngineeringSimulation InfrastructureParallel ProgrammingReservoir ManagementComputer ModelingMultiscale Modeling
Abstract The term "windowing technique" means time-dependent replacement of grids and parameters during a simulation run. The window is a confined area within the block model and it contains an other grid than the surrounding basic grid. The basic grid is Cartesian, while the grids inside windows can be Cartesian but with a different spacing, or 2D or 3D irregular grids. A window may also contain a different parameterization of the same basic grid. The basic Cartesian block model and the windows are independent entities. A well-defined relation between windows and basic grid permits the exchange of the grids during the run. Dual timestepping allows the use of large global timesteps outside windows and other (usually smaller) timesteps inside windows. Effective parallel processing of the windows is also possible. Potential applications of windows are well test simulation models embedded in coarse grids, modeling of arbitrary-direction horizontal wells, different realizations of stochastic modeling, effective parameter updating during the life of a model, etc.