Blar i SINTEF Open på tidsskrift "Computational Geosciences"
Viser treff 1-20 av 27
-
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 ... -
A simulation workflow for large-scale CO2 storage in the Norwegian North Sea
(Journal article; Peer reviewed, 2015)Large-scale CO2 injection problems have revived the interest in simple models, like percolation and vertically-averaged models, for simulating fluid flow in reservoirs and aquifers. A series of such models have been collected ... -
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 ... -
Combining the modified discrete element method with the virtual element method for fracturing of porous media
(Journal article; Peer reviewed, 2017)Simulation of fracturing processes in porous rocks can be divided into two main branches: (i) modeling the rock as a continuum enhanced with special features to account for fractures or (ii) modeling the rock by a discrete ... -
Comparison between cell-centered and nodal-based discretization schemes for linear elasticity
(Journal article; Peer reviewed, 2017)In this paper, we study newly developed methods for linear elasticity on polyhedral meshes. Our emphasis is on applications of the methods to geological models. Models of subsurface, and in particular sedimentary rocks, ... -
Data-driven modelling with coarse-grid network models
(Peer reviewed; Journal article, 2023)We propose to use a conventional simulator, formulated on the topology of a coarse volumetric 3D grid, as a data-driven network model that seeks to reproduce observed and predict future well responses. The conceptual ... -
Derivative-free trust region optimization for robust well control under geological uncertainty
(Peer reviewed; Journal article, 2022)A Derivative-Free Trust-Region (DFTR) algorithm is proposed to solve the robust well control optimization problem under geological uncertainty. Derivative-Free (DF) methods are often a practical alternative when gradients ... -
Efficient adjoint-based well-placement optimization using flow diagnostics proxies
(Peer reviewed; Journal article, 2021)Model-based optimization of placement and trajectories of wells in petroleum reservoirs by the means of reservoir simulation forecasts is computationally demanding due to the high number of simulations typically required ... -
Efficient flow diagnostics proxies for polymer flooding
(Journal article; Peer reviewed, 2017)Flow diagnostics refers to a family of numerical methods that within a few seconds can compute visually intuitive quantities illuminating flow patterns and well connections for full 3D reservoir models. The starting point ... -
Efficient reordered nonlinear Gauss–Seidel solvers with higher order for black-oil models
(Peer reviewed; Journal article, 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 ... -
Efficient reordered nonlinear Gauss–Seidel solvers with higher order for black-oil models
(Peer reviewed; Journal article, 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 ... -
Efficient well placement optimization under uncertainty using a virtual drilling procedure
(Peer reviewed; Journal article, 2021)An Automatic Well Planner (AWP) is used to efficiently adjust pre-determined well paths to honor near-well properties and increase overall production. AWP replicates modern geosteering decision-making where adjustments to ... -
Fully implicit higher-order schemes applied to polymer flooding
(Journal article; Peer reviewed, 2017)In water-based EOR methods, active chemical or biological substances are added to modify the physical properties of the fluids or/and the porous media at the interface between oil and water. The resulting displacement ... -
Fully implicit simulation of polymer flooding with MRST
(Journal article; Peer reviewed, 2017)The present work describes a fully implicit simulator for polymer injection implemented in the free, open-source MATLAB Reservoir Simulation Toolbox (MRST). Polymer injection is one of the widely used enhanced oil recovery ... -
Fully-implicit simulation of vertical-equilibrium models with hysteresis and capillary fringe
(Journal article, 2015)Geological carbon storage represents a new and substantial challenge for the subsurface geosciences. To increase understanding and make good engineering decisions, containment processes and large-scale storage operations ... -
Modeling geomechanical impact of fluid storage in poroelastic media using precomputed response functions
(Journal article; Peer reviewed, 2017)When injecting CO2 or other fluids into a geological formation, pressure plays an important role both as a driver of flow and as a risk factor for mechanical integrity. The full effect of geomechanics on aquifer flow can ... -
Multiresolution Coupled Vertical Equilibrium Model for Fast Flexible Simulation of CO2 Storage.
(Journal article; Peer reviewed, 2018)CO2 capture and storage is an important technology for mitigating climate change. Design of efficient strategies for safe, long-term storage requires the capability to efficiently simulate processes taking place on very ... -
Nonlinear domain decomposition scheme for sequential fully implicit formulation of compositional multiphase flow
(Peer reviewed; Journal article, 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 ... -
Nonlinear Solver for Three-Phase Transport Problems Based on Approximate Trust Regions
(Journal article; Peer reviewed, 2017)Implicit transport solvers used in reservoir simulation can take longer time steps than explicit solvers, but for long time steps, the commonly used Newton-Raphson’s method will often fail to converge. The convergence ... -
Numerical modeling of non-Newtonian fluid flow in fractures and porous media
(Journal article; Peer reviewed, 2017)Non-Newtonian fluids having Bingham or power-law rheology are common in many applications within drilling and reservoir engineering. Examples of such fluids are drilling muds, foams, heavy oil, hydraulic-fracturing and ...