Browsing Institutt for matematiske fag by Journals "Computational Geosciences"
Now showing items 1-7 of 7
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A fully implicit WENO scheme on stratigraphic and unstructured polyhedral grids
(Journal article; Peer reviewed, 2019)Many authors have used higher-order spatial discretizations to reduce numerical diffusion, which can be particularly pronounced when simulating EOR processes involving active chemical substances that are transported by ... -
Accelerating multiscale simulation of complex geomodels by use of dynamically adapted basis functions
(Journal article; Peer reviewed, 2019)A number of different multiscale methods have been developed as a robust alternative to upscaling and as a means for accelerated reservoir simulation of high-resolution geomodels. In their basic setup, multiscale methods ... -
Batch seismic inversion using the iterative ensemble Kalman smoother
(Peer reviewed; Journal article, 2021)An ensemble-based method for seismic inversion to estimate elastic attributes is considered, namely the iterative ensemble Kalman smoother. The main focus of this work is the challenge associated with ensemble-based inversion ... -
Efficient reordered nonlinear Gauss–Seidel solvers with higher order for black-oil models
(Journal article; Peer reviewed, 2019)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 ... -
Nonlinear domain decomposition scheme for sequential fully implicit formulation of compositional multiphase flow
(Journal article; Peer reviewed, 2019)New sequential fully implicit (SFI) methods for compositional flow simulation have been recently investigated. These SFI schemes decouple the fully coupled problem into separate pressure and transport problems and have ... -
Unstructured Voronoi grids conforming to lower-dimensional objects
(Journal article; Peer reviewed, 2018)We present a novel mixed-dimensional method for generating unstructured polyhedral grids that conform to prescribed geometric objects in arbitrary dimensions. Two types of conformity are introduced: (i) control-point ... -
Value of information of time-lapse seismic data by simulation-regression: comparison with double-loop Monte Carlo
(Peer reviewed; Journal article, 2019)Simulation-regression is a computationally efficient methodology to estimate the value of information (VOI), as it involves directly estimating the value outcomes corresponding to different data realizations by building a ...