Øystein Strengehagen Klemetsdal
Forsker
Øystein Strengehagen Klemetsdal
Forsker
Publikasjoner og ansvarsområder
How to use recent developments of the MATLAB Reservoir Simulation Toolbox for fast prototyping of complex fluid models
A Comparison of Consistent Discretizations for Elliptic Problems on Polyhedral Grids
In this work, we review a set of consistent discretizations for second-order elliptic equations, and compare and contrast them with respect to accuracy, monotonicity, and factors affecting their computational cost (degrees of freedom, sparsity, and condition numbers). Our comparisons include the...
Evaluating thermal losses and storage capacity in high-temperature aquifer thermal energy storage (HT-ATES) systems with well operating limits: insights from a study-case in the Greater Geneva Basin, Switzerland
Dynamic Coarsening and Local Reordered Nonlinear Solvers for Simulating Transport in Porous Media
We present a robust and flexible sequential solution approach in which the flow equation is solved on the original grid, whereas the transport equations are solved with a new dynamic coarsening method that adapts the grid resolution locally to reduce the number of cells as much as possible. The...
Additive Schwarz Preconditioned Exact Newton Method as a Nonlinear Preconditioner for Multiphase Porous Media Flow
Reduced-Physics Multilevel Monte Carlo Methods for Uncertainty Quantification in Complex Reservoirs
The Monte Carlo (MC) method is an appealing candidate for uncertainty quantification in reservoir simulation for three reasons: (i) It is the preferred approach for systematic reduction in variance for cases with high-dimensional uncertainty with a strongly nonlinear effect (robustness); (ii) it is...
Geothermal Simulation Using MRST
Thermal energy from medium to high-enthalpy aquifers is an appealing energy resource: it is renewable, always on, and, at least in principle, available anywhere on the planet. Moreover, and perhaps equally important, aquifers are excellent candidates for flexible large-scale energy storage. This is...
A Comparison of Consistent Discretizations for Elliptic Problems on Polyhedral Grids
Efficient reordered nonlinear Gauss–Seidel solvers with higher order for black-oil models
The fully implicit method is the most commonly used approach to solve black-oil problems in reservoir simulation. The method requires repeated linearization of large nonlinear systems and produces ill-conditioned linear systems. We present a strategy to reduce computational time that relies on two...