Browsing Bergen Open Research Archive by Author "Nilsen, Halvor Møll"
Now showing items 1-11 of 11
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Field-case simulation of CO2-plume migration using vertical-equilibrium models
Nilsen, Halvor Møll; Herrera, Paulo; Ashraf, Seyed Meisam; Ligaard, Ingeborg S.; Iding, Martin; Hermanrud, Christian; Lie, Knut-Andreas; Nordbotten, Jan Martin; Dahle, Helge K.; Keilegavlen, Eirik (Peer reviewed; Journal article, 2011)When injected in deep saline aquifers, CO2 moves radially away from the injection well and progressively higher in the formation because of buoyancy forces. Analyzes have shown that after the injection period, CO2 will ... -
Fully-implicit simulation of vertical-equilibrium models with hysteresis and capillary fringe
Nilsen, Halvor Møll; Lie, Knut-Andreas; Andersen, Odd (Peer reviewed; Journal article, 2016-02)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 ... -
Modelling Geomechanical Impact of CO2 Injection Using Precomputed Response Functions
Andersen, Odd; Nilsen, Halvor Møll; Gasda, Sarah (Conference object; Peer reviewed, 2016)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 ... -
Open-source MATLAB implementation of consistent discretisations on complex grids
Lie, Knut-Andreas; Krogstad, Stein; Ligaarden, Ingeborg Skjelkvåle; Natvig, Jostein Roald; Nilsen, Halvor Møll; Skaflestad, Bård (Peer reviewed; Journal article, 2011-08-02)Accurate geological modelling of features such as faults, fractures or erosion requires grids that are flexible with respect to geometry. Such grids generally contain polyhedral cells and complex grid-cell connectivities. ... -
An Open-Source Toolchain for Simulation and Optimization of Aquifer-Wide CO2 Storage
Andersen, Odd; Lie, Knut-Andreas; Nilsen, Halvor Møll (Peer reviewed; Journal article, 2016-02-04)Planning and execution of large-scale, aquifer-wide CO2 storage operations will require extensive use of computer modelling and simulations. The required computational tools will vary depending on the physical characteristics ... -
Reexamining CO2 Storage Capacity and Utilization of the Utsira Formation
Andersen, Odd; Nilsen, Halvor Møll; Lie, Knut-Andreas (Conference object, 2014)In this work we provide estimates of CO2 storage capacity of the Utsira Formation using the recently provided datasets from the Norwegian Petroleum Directorate, taking CO2 density variation into account. We also investigate ... -
Robust simulation of sharp-interface models for fast estimation of CO2 trapping capacity in large-scale aquifer systems
Nilsen, Halvor Møll; Lie, Knut-Andreas; Andersen, Odd (Peer reviewed; Journal article, 2016-02)Modeling 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 ... -
A simulation workflow for large-scale CO2 storage in the Norwegian North Sea
Lie, Knut-Andreas; Nilsen, Halvor Møll; Andersen, Odd; Møyner, Olav (Journal article, 2016-06)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 ... -
Using sensitivities and vertical-equilibrium models for parameter estimation of CO2 injection models with application to Sleipner data
Nilsen, Halvor Møll; Krogstad, Stein; Andersen, Odd; Allen, Rebecca; Lie, Knut-Andreas (Peer reviewed; Journal article, 2017-07)A key part of planning CO2 storage sites is to devise a monitoring strategy with proper modelling support. Herein, we show how a simulation framework that incorporates adjoint-based sensitivities can be combined with ... -
Vertical Equilibrium Flow Models with Fully Coupled Geomechanics for CO2 Storage Modeling, Using Precomputed Mechanical Response Functions
Andersen, Odd; Nilsen, Halvor Møll; Gasda, Sarah Eileen (Peer reviewed; Journal article, 2017)Vertical equilibrium (VE) models have proved to be attractive for simulation of \co storage scenarios. Their primary advantage is a substantial reduction in computational requirements compared to standard 3D simulation ... -
Vertically averaged equations with variable density for CO2 flow in porous media
Andersen, Odd; Gasda, Sarah Eileen; Nilsen, Halvor Møll (Peer reviewed; Journal article, 2015-03)Carbon capture and storage has been proposed as a viable option to reduce CO 2 emissions. Geological storage of CO 2 where the gas is injected into geological formations for practically indefinite storage, is an integral ...