Browsing Bergen Open Research Archive by Author "Keilegavlen, Eirik"
Now showing items 21-40 of 42
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Implementation of mixed-dimensional models for flow in fractured porous media
Keilegavlen, Eirik; Fumagalli, Alessio; Berge, Runar Lie; Stefansson, Ivar (Peer reviewed; Journal article, 2019)Models that involve coupled dynamics in a mixed-dimensional geometry are of increasing interest in several applications. Here, we describe the development of a simulation model for flow in fractured porous media, where the ... -
Inexact linear solvers for control volume discretizations in porous media
Keilegavlen, Eirik; Nordbotten, Jan Martin (Peer reviewed; Journal article, 2014-12-03)We discuss the construction ofmulti-level inexact linear solvers for control volume discretizations for porous media. The methodology forms a contrast to standard iterative solvers by utilizing an algebraic hierarchy of ... -
An isenthalpic formulation for simulating geothermal systems with phase changes
Duran Triana, Omar Yesid; Lipovac, Veljko; Keilegavlen, Eirik; Radu, Adrian Florin; Berre, Inga (Conference object; Peer reviewed, 2023)We propose a unified isenthalpic formulation for the equilibrium problem of compositional multiphase mixtures. To solve the equilibrium problem numerically, we used an interior point method with line search and present an ... -
Mass Conservative Domain Decomposition for Porous Media Flow
Nordbotten, Jan Martin; Keilegavlen, Eirik; Sandvin, Andreas (Chapter, 2012-03-28) -
Modeling and discretization of flow in porous media with thin, full-tensor permeability inclusions
Starnoni, Michele; Berre, Inga; Keilegavlen, Eirik; Nordbotten, Jan Martin (Journal article; Peer reviewed, 2021)When modeling fluid flow in fractured reservoirs, it is common to represent the fractures as lower-dimensional inclusions embedded in the host medium. Existing discretizations of flow in porous media with thin inclusions ... -
Modelling of the Shear Dilation Based Hydraulic Stimulation in Enhanced Geothermal Systems Considering Fractures in Different Scales
Ucar, Eren; Berre, Inga; Keilegavlen, Eirik (Conference lecture, 2016-09)A numerical approach for modelling of shear dilation of existing fractures in hydraulic stimulation of geothermal reservoirs at low elevated pressures is presented. The fractured rock in the reservoir is modelled as a ... -
Modelling the non-Hydrostatic Pressure in σ-coordinate Ocean Models
Keilegavlen, Eirik (Master thesis, 2006-09-22) -
Numerical modeling of wing crack propagation accounting for fracture contact mechanics
Dang, Hau Trung; Keilegavlen, Eirik; Berre, Inga (Journal article; Peer reviewed, 2020)As a consequence of shearing, wing cracks can emerge from pre-existing fractures. The process involves the interaction of sliding of the existing fracture surfaces and the tensile material failure that creates wing cracks. ... -
Numerical Modelling of Convection‑Driven Cooling, Deformation and Fracturing of Thermo‑Poroelastic Media
Stefansson, Ivar; Keilegavlen, Eirik; Halldorsdottir, Sæunn; Berre, Inga (Journal article; Peer reviewed, 2021)Convection-driven cooling in porous media influences thermo-poro-mechanical stresses, thereby causing deformation. These processes are strongly influenced by the presence of fractures, which dominate flow and heat transfer. ... -
Numerical Treatment of State-Dependent Permeability in Multiphysics Problems
Stefansson, Ivar; Keilegavlen, Eirik (Journal article; Peer reviewed, 2023)Constitutive laws relating fluid potentials and fluxes in a nonlinear manner are common in several porous media applications, including biological and reactive flows, poromechanics, and fracture deformation. Compared to ... -
PorePy: an open-source software for simulation of multiphysics processes in fractured porous media
Keilegavlen, Eirik; Berge, Runar Lie; Fumagalli, Alessio; Starnoni, Michele; Stefansson, Ivar; Varela, Jhabriel; Berre, Inga (Journal article; Peer reviewed, 2021)Development of models and dedicated numerical methods for dynamics in fractured rocks is an active research field, with research moving towards increasingly advanced process couplings and complex fracture networks. The ... -
PoroTwin: A Digital Twin for a FluidFlower Rig
Keilegavlen, Eirik; Fonn, Eivind; Johannessen, Kjetil Andre; Eikehaug, Kristoffer; Both, Jakub Wiktor; Fernø, Martin; Kvamsdal, Trond; Rasheed, Adil; Nordbotten, Jan Martin (Journal article; Peer reviewed, 2023)We present a framework for integrated experiments and simulations of tracer transport in heterogeneous porous media using digital twin technology. The physical asset in our setup is a meter-scale FluidFlower rig. The digital ... -
A posteriori error estimates for hierarchical mixed-dimensional elliptic equations
Varela, Jhabriel; Ahmed, Elyes; Keilegavlen, Eirik; Nordbotten, Jan Martin; Radu, Adrian Florin (Journal article; Peer reviewed, 2022)Mixed-dimensional elliptic equations exhibiting a hierarchical structure are commonly used to model problems with high aspect ratio inclusions, such as flow in fractured porous media. We derive general abstract estimates ... -
Postinjection Normal Closure of Fractures as a Mechanism for Induced Seismicity
Ucar, Eren; Berre, Inga; Keilegavlen, Eirik (Peer reviewed; Journal article, 2017-10-04)Understanding the controlling mechanisms underlying injection-induced seismicity is important for optimizing reservoir productivity and addressing seismicity-related concerns related to hydraulic stimulation in Enhanced ... -
Reactivation of fractures in subsurface reservoirs - A numerical approach using a static-dynamic friction model
Berge, Runar Lie; Berre, Inga; Keilegavlen, Eirik (Chapter; Peer reviewed; Journal article, 2019)Fluid-induced slip of fractures is characterized by strong multiphysics couplings. Three physical processes are considered: Flow, rock deformation and fracture deformation. The fractures are represented as lower-dimensional ... -
Robust Control Volume Methods for Reservoir Simulation on Challenging Grids
Keilegavlen, Eirik (Doctoral thesis, 2010-02-19) -
Robust Linear Domain Decomposition Schemes for Reduced Nonlinear Fracture Flow Models
Ahmed, Elyes; Fumagalli, Alessio; Budisa, Ana; Keilegavlen, Eirik; Nordbotten, Jan Martin; Radu, Adrian Florin (Journal article; Peer reviewed, 2021)In this work, we consider compressible single-phase flow problems in a porous medium containing a fracture. In the fracture, a nonlinear pressure-velocity relation is prescribed. Using a non-overlapping domain decomposition ... -
Simulation of Reactive Transport in Fractured Porous Media
Banshoya, Shin Irgens; Berre, Inga; Keilegavlen, Eirik (Journal article; Peer reviewed, 2023)Numerical simulations of reactive transport in fractured porous media require the solution of coupled physical and chemical processes that depend on the fractures. Such coupled processes are described by a system of nonlinear ... -
Transport of polymer particles in oil–water flow in porous media: Enhancing oil recovery
Endo Kokubun, Max Akira; Radu, Florin Adrian; Keilegavlen, Eirik; Kumar, Kundan; Spildo, Kristine (Peer reviewed; Journal article, 2019)We study a heuristic, core-scale model for the transport of polymer particles in a two-phase (oil and water) porous medium. We are motivated by recent experimental observations which report increased oil recovery when ... -
Two-level simulation of injection-induced fracture slip and wing-crack propagation in poroelastic media
Dang, Hau Trung; Berre, Inga; Keilegavlen, Eirik (Journal article; Peer reviewed, 2022)In fractured poroelastic media under high differential stress, the shearing of pre-existing fractures and faults and propagation of wing cracks can be induced by fluid injection. This paper presents a two-dimensional ...