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Knut-Andreas Lie

Chief Scientist

Knut-Andreas Lie

Chief Scientist

Knut-Andreas Lie
Phone: +47 930 58 721
Mobile: +47 930 58 721
Department: Mathematics and Cybernetics
Office: Oslo

publications and responsibilities

Publications

Publication

A Feature-Enriched Multiscale Method for Simulating Complex Geomodels

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1455740

Multiscale methods have been shown to offer an order-of-magnitude increase in the speed of reservoir simulators. This may enable users to model complex fluid flow and geology with greater speed and flexibility than is available with the current computational technologies. Contemporary multiscale met...

Year 2017
Type Conference paper/Book chapter
Publication

Unstructured Gridding and Consistent Discretizations for Reservoirs with Faults and Complex Wells

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1455741

This work consists of two parts. In the first part, we present new methods for generating unstructured polyhedral grids that align to prescribed geometric objects. Control-point alignment of cell centroids is introduced to accurately represent horizontal and multilateral wells, but can also be used ...

Authors Klemetsdal Øystein Berge Runar Lie Lie Knut-Andreas Nilsen Halvor Møll Møyner Olav
Year 2017
Type Conference paper/Book chapter
Publication

A General Non-Uniform Coarsening and Upscaling Framework for Reduced-Order Modeling

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1455742

This paper presents a general framework for constructing effective reduced-order models from an existing high-fidelity reservoir model, irrespective of grid topology. We employ a flexible hierarchical grid coarsening strategy that is designed to preserve geologic features and structures in the under...

Authors Lie Knut-Andreas Kedia Kushal Skaflestad Bård Wang Xioachen Yang Yahan Wu Xiao-Hui Hoda Nazish
Year 2017
Type Conference paper/Book chapter
Publication

On obtaining optimal well rates and placement for CO2 storage

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1455745

Large-scale storage of CO2 in saline aquifers is considered an essential technology to mitigate CO2 emissions. Storage potential has mainly been estimated based on volumetrics or detailed simulations for specific injection scenarios. In practice, achievable storage capacity will depend on engineerin...

Publication

Successful application of multiscale methods in a real reservoir simulator environment

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1455746

For the past 10 years or so, a number of so-called multiscale methods have been developed as an alternative approach to upscaling and to accelerate reservoir simulation. The key idea of all these methods is to construct a set of prolongation operators that map between unknowns associated with cells ...

Authors Lie Knut-Andreas Møyner Olav #Natvig #Jostein Roald Kozlova Antonina Bratvedt Kyrre Watanabe Shingo Li Zhuoyi
Year 2017
Type Journal article
Publication

Fully implicit simulation of polymer flooding with MRST

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1455747

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 (EOR) techniques and complicated physical process is involved, which makes ac...

Year 2017
Type Journal article
Publication

Introduction to reservoir simulation as practiced in industry

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1460453

For more than 50 years, computer simulations have been used to understand and forecast fluid flow in petroleum reservoirs. Somewhat simplified, a simulation model consists of three parts: (i) a volumetric grid with cell/face properties that describes the given porous rock formation; (ii) a flow mode...

Year 2017
Type Presentation
Publication

Use of multiple multiscale operators to accelerate simulation of complex geomodels

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1483936

Multiscale methods have been developed as a robust alternative to upscaling and to accelerate reservoir simulation. In their basic setup, multiscale methods use a restriction operator to construct a reduced system of flow equations that can be solved on a coarser grid, and a prolongation operator to ...

Year 2017
Type Journal article
Publication

Fully implicit higher-order schemes applied to polymer flooding

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1483940

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 processes are governed by complex interplays between the transport of chemical sub...

Authors Mykkeltvedt Trine Solberg Raynaud Xavier Lie Knut-Andreas
Year 2017
Type Journal article
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