Helmer André Friis
Førsteamanuensis
Kontakt
E-post: helmer.a.friis@uis.no
Organisasjonsenhet
Det teknisk-naturvitenskapelige fakultet
Institutt for energi- og petroleumsteknologi
Publikasjoner
Vitenskapelige publikasjoner
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2024)
Ostwald ripening of gas bubbles in porous media: Impact of pore geometry and spatial bubble distribution.Advances in Water Resources.
ISSN 0309-1708.
Volum 187.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2024)
Ripening of Capillary-Trapped CO2 Ganglia Surrounded by Oil and Water at the Pore Scale: Impact of Reservoir Pressure and Wettability.Energy & Fuels.
ISSN 0887-0624.
Volum 38.
Hefte 10.
s.8853-8874.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2023)
Pore-scale Ostwald ripening of gas bubbles in the presence of oil and water in porous media.Journal of Colloid and Interface Science.
ISSN 0021-9797.
Volum 647.
s.331-343.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2023)
Adaptive mesh refinement in locally conservative level set methods for multiphase fluid displacements in porous media.Computational Geosciences.
ISSN 1420-0597.
Helland, Johan Olav; Friis, Helmer André; Assadi, Mohsen; Klimkowski, Lukasz; Nagy, Stanislaw
(2023)
Prediction of Optimal Production Time during Underground CH4 Storage with Cushion CO2 Using Reservoir Simulations and Artificial Neural Networks.Energy & Fuels.
ISSN 0887-0624.
Volum 37.
Hefte 23.
s.19022-19038.
Helland, Johan Olav; Friis, Helmer André; Assadi, Mohsen; Nagy, Stanislaw
(2023)
Machine learning for underground gas storage with cushion CO2 using data from reservoir simulation.IOP Conference Series: Materials Science and Engineering.
ISSN 1757-8981.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2022)
A level set approach to Ostwald ripening of trapped gas bubbles in porous media.Transport in Porous Media.
ISSN 0169-3913.
Volum 145.
Hefte 2.
s.441-474.
Jettestuen, Espen; Friis, Helmer Andre`; Helland, Johan Olav
(2021)
A locally conservative multiphase level set method for capillary-controlled displacements in porous media.Journal of Computational Physics.
ISSN 0021-9991.
Volum 428.
Helland, Johan Olav; Jettestuen, Espen; Friis, Helmer Andre`
(2021)
A Discrete-Domain Approach to Three-Phase Hysteresis in Porous Media.Water Resources Research.
ISSN 0043-1397.
Volum 57.
Hefte 6.
DOI: 10.1029/2021WR029560
Friis, Helmer Andre`; Pedersen, Janne; Jettestuen, Espen; Helland, Johan Olav; Prodanovic, Masa
(2019)
Pore-Scale Level Set Simulations of Capillary-Controlled Displacement with Adaptive Mesh Refinement.Transport in Porous Media.
ISSN 0169-3913.
Volum 128.
Hefte 1.
s.123-151.
Helland, Johan Olav; Pedersen, Janne; Friis, Helmer Andre`; Jettestuen, Espen
(2019)
A multiphase level set approach to motion of disconnected fluid ganglia during capillary-dominated three-phase flow in porous media: Numerical validation and applications.Chemical Engineering Science (CES).
ISSN 0009-2509.
Volum 203.
s.138-162.
Suter, Erich Christian; Kårstad, Terje Per; Escalona Varela, Alejandro; Friis, Helmer Andre`; Vefring, Erlend
(2019)
Principles for a hierarchical earth model representation aiming towards fit-for-purpose grid resolution. I: 81th EAGE Annual Conference & Exhibition 2019.European Association of Geoscientists and Engineers (EAGE).
ISBN 9781510888036.
Rasouli, Seyedeh Shahrzad; Jolma, Ingunn Westvik; Friis, Helmer André
(2019)
Impact of spatially varying hydraulic conductivities on tumor interstitial fluid pressure distribution.Informatics in Medicine Unlocked (IMU).
Volum 16.
s.1-15.
Burrows, Eva; Friis, Helmer Andre`; Haveraaen, Magne
(2018)
An array API for finite difference methods. I: Proceedings of the 5th ACM SIGPLAN International Workshop on Libraries, Languages, and Compilers for Array Programming.Association for Computing Machinery (ACM).
ISBN 978-1-4503-5852-1.
s.59-66.
Suter, Erich Christian; Kårstad, Terje Per; Escalona Varela, Alejandro; Friis, Helmer Andre`; Vefring, Erlend; Alyaev, Sergey
(2018)
A Methodology for Effective Earth Model Management while Geosteering. I: Second EAGE/SPE Geosteering and Well Placement Workshop.ISBN 978-94-6282-275-7.
Helland, Johan Olav; Friis, Helmer Andre`; Pedersen, Janne; Jettestuen, Espen
(2017)
Pore-scale simulation of three-phase capillary pressure and trapping on 3D rock images. I: 19th European Symposium on Improved Oil Recovery/IOR Norway 2017.
European Association of Geoscientists and Engineers (EAGE).
ISBN 978-94-6282-209-2.
Helland, Johan Olav; Friis, Helmer Andre`; Jettestuen, Espen; Skjæveland, Svein Magne
(2017)
Footprints of spontaneous fluid redistribution on capillary pressure in porous rock.Geophysical Research Letters.
ISSN 0094-8276.
Volum 44.
Hefte 10.
s.4933-4943.
DOI: 10.1002/2017GL073442
Suter, Erich Christian; Friis, Helmer Andre`; Vefring, Erlend; Kårstad, Terje Per; Escalona Varela, Alejandro
(2017)
A novel method for multi-resolution earth model gridding. I: SPE Reservoir Simulation Conference, 20-22 February, Montgomery, Texas, USA.Society of Petroleum Engineers.
ISBN 978-1-61399-483-2.
DOI: 10.2118/182687-MS
Suter, Erich Christian; Cayeux, Eric; Friis, Helmer Andre`; Kårstad, Terje Per; Escalona Varela, Alejandro; Vefring, Erlend
(2017)
A Novel Method for Locally Updating an Earth Model While Geosteering.International journal of geosciences.
ISSN 2156-8359.
Volum 8.
Hefte 2.
s.237-264.
Burrows, Eva; Friis, Helmer Andre`; Haveraaen, Magne
(2016)
An Array API for FDM. I: Proceedings of the Third International Workshop on Sustainable Ultrascale Computing Systems (NESUS 2016).ISBN 978-84-617-7450-0.
s.59-68.
Omekeh, Aruoture Voke; Friis, Helmer Andre`; Evje, Steinar; Fjelde, Ingebret
(2015)
A MODEL FOR LOW SALINITY FLOODING EXPERIMENTS: DISSOLUTION AND ION EXCHANGE.Journal of Porous Media.
ISSN 1091-028X.
Volum 18.
Hefte 3.
s.189-213.
Friis, Helmer Andre`; Evje, Steinar
(2014)
Well-posedness of a compressible gas-liquid model for deepwater oil well operations.Acta Mathematica Scientia.
ISSN 0252-9602.
Volum 34.
Hefte 1.
s.107-124.
Friis, Helmer Andre`; Evje, Steinar
(2013)
Asymptotic behavior of a compressible two-phase model with well-formation interaction.Journal of Differential Equations.
ISSN 0022-0396.
Volum 254.
Hefte 9.
s.3957-3993.
Omekeh, Aruoture Voke; Evje, Steinar; Friis, Helmer Andre`
(2013)
Modeling of low salinity effects in sandstone oil rocks.
International Journal of Numerical Analysis and Modeling.
ISSN 1923-2942.
Volum 4.
Hefte 2.
Omekeh, Aruoture Voke; Friis, Helmer Andre`; Fjelde, Ingebret; Evje, Steinar
(2012)
Modeling of Ion-Exchange and Solubility in Low Salinity Water Flooding. I: SPE Improved Oil Recovery Symposium, 14-18 April 2012, Tulsa, Oklahoma, USA.Society of Petroleum Engineers.
ISBN 978-1-61399-197-8.
DOI: 10.2118/154144-m
Friis, Helmer Andre`; Evje, Steinar
(2012)
Numerical treatment of two-phase flow in capillary heterogeneous porous media by finite-volume approximations.
International Journal of Numerical Analysis & Modeling.
ISSN 1705-5105.
Volum 9.
Hefte 3.
s.505-528.
Friis, Helmer Andre`; Edwards, Michael G.
(2011)
A family of MPFA finite-volume schemes with full pressure support for the general tensor pressure equation on cell-centered triangular grids.Journal of Computational Physics.
ISSN 0021-9991.
Volum 230.
Hefte 1.
s.205-231.
Friis, Helmer Andre`; Evje, Steinar
(2011)
Global weak solutions for a gas-liquid model with external forces and general pressure law.SIAM Journal on Applied Mathematics.
ISSN 0036-1399.
Volum 71.
Hefte 2.
s.409-442.
DOI: 10.1137/100813336
Friis, Helmer Andre`; Evje, Steinar
(2011)
Well-posedness of a compressible gas-liquid model with a friction term important for well control operations.SIAM Journal on Applied Mathematics.
ISSN 0036-1399.
Volum 71.
Hefte 6.
s.2014-2047.
DOI: 10.1137/110835499
Friis, Helmer Andre`; Evje, Steinar; Flåtten, Tore
(2009)
A Numerical Study of Characteristic Slow-Transient Behavior of a Compressible 2D Gas-Liquid Two-Fluid Model.
Advances in Applied Mathematics and Mechanics.
ISSN 2070-0733.
Volum 1.
Hefte 2.
s.166-200.
Formidling
Helland, Johan Olav; Singh, Deepak; Friis, Helmer André; Jettestuen, Espen
(2024)
Ostwald ripening of trapped gas in the presence of oil and water in subsurface storage – A level set pore-scale modelling approach .
Shell Pore Scale Physics Seminar;
2024-06-06.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2023)
Pore-scale Ostwald ripening of residually trapped CO2 in the presence of oil and water at immiscible and near-miscible conditions.
Interpore 2023;
2023-05-22 - 2023-05-25.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2023)
Ostwald ripening: Bubble distribution evolution in porous media.
SIAM 2023 - Conference on Mathematical & Computational issues in the Geosciences;
2023-06-19 - 2023-06-22.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2023)
Ostwald ripening of trapped gas in the presence of oil and water in subsurface storage.
The CSSR conference;
2023-09-12 - 2023-09-13.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2023)
Ostwald ripening of trapped gas in the presence of oil and water in subsurface storage.
InterPore Norway 2023;
2023-11-09.
Jettestuen, Espen; Singh, Deepak; Friis, Helmer André; Helland, Johan Olav
(2023)
Ostwald ripening of trapped gas in the presence of oil and water in subsurface storage.
InterPore Norway 2023;
2023-11-09.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2022)
A pore-scale level-set approach to Ostwald ripening of gas bubbles in porous media in the presence of residual oil and water.
Interpore 2022;
2022-05-30 - 2022-06-02.
Singh, Deepak; Friis, Helmer André; Jettestuen, Espen; Helland, Johan Olav
(2022)
A level set approach to Ostwald ripening of real gases in porous media.
CSSR Kick-Off Science Day;
2022-09-08.
Singh, Deepak; Friis, Helmer Andre`; Jettestuen, Espen; Helland, Johan Olav
(2021)
A level set approach to Ostwald ripening of real gases in porous media.
InterPore2021 - 13th International Conference on Porous Media;
2021-05-31 - 2021-06-04.
Helland, Johan Olav; Jettestuen, Espen; Friis, Helmer Andre`
(2019)
Simulation of Capillary Trapping in Three-phase Displacement using a Level Set Approach with Local Volume Preservation .
SIAM Conference on Mathematical & Computational Issues in the Geosciences (GS19);
2019-03-11 - 2019-03-14.
Helland, Johan Olav; Jettestuen, Espen; Friis, Helmer Andre`
(2019)
Simulation of Capillary Trapping in Three-Phase Displacement Using a Locally Conservative Level Set Approach.
Workshop i anledning IOR Norway 2019 ;
2019-03-18.
Suter, Erich Christian; Friis, Helmer Andre`; Kårstad, Terje Per; Escalona, Alejandro; Vefring, Erlend
(2019)
Novel Principles for Effective Earth Model Grid Management While Geosteering.
SIAM Conference on Mathermatical & Computational Issures in the Geosciences (GS19);
2019-03-11 - 2019-03-14.
Helland, Johan Olav; Friis, Helmer Andre`; Jettestuen, Espen; Paustian, Rebecca Lynn; Wildenschild, Dorthe
(2019)
Simulation of capillary-dominated three-phase flow experiments on 3-D bead packs.
Interpore 2019;
2019-05-06 - 2019-05-10.
Suter, Erich Christian; Kårstad, Terje Per; Escalona, Alejandro; Friis, Helmer Andre`; Vefring, Erlend
(2019)
Principles for a hierarchical earth model representation aiming towards fit-for-purpose grid resolution.
81st EAGE Conference and Exhibition 2019;
2019-06-03 - 2019-06-06.
Helland, Johan Olav; Friis, Helmer Andre`; Jettestuen, Espen
(2019)
CO2 storage in the presence of residual oil.
Bergen CCUS Seminar;
2019-12-03 - 2019-12-04.
Suter, Erich Christian; Kårstad, Terje Per; Escalona Varela, Alejandro; Friis, Helmer Andre`; Vefring, Erlend; Alyaev, Sergey
(2018)
A Methodology for Effective Earth Model Management while Geosteering.
Second EAGE/SPE Geosteering and Well Placement Workshop;
2018-11-05 - 2018-11-08.
Helland, Johan Olav; Friis, Helmer Andre`; Pedersen, Janne; Jettestuen, Espen
(2017)
Pore-scale simulation of three-phase gas and water invasion processes on 3D rock images.
9th International Conference on Porous Media & Annual Meeting 2017 (Interpore 9);
2017-05-08 - 2017-05-12.
Helland, Johan Olav; Friis, Helmer Andre`; Pedersen, Janne; Jettestuen, Espen
(2017)
Pore-scale simulation of three-phase capillary pressure and trapping on 3D rock images.
IOR NORWAY 2017 - 19th European Symposium on Improved Oil Recovery;
2017-04-24 - 2017-04-27.
Suter, Erich Christian; Friis, Helmer Andre`; Kårstad, Terje Per; Escalona, Alejandro; Vefring, Erlend
(2017)
A Novel Method for Multi-Resolution Earth Model Gridding.
SPE Reservoir Simulation Conference;
2017-02-20 - 2017-02-22.
Pedersen, Janne; Friis, Helmer Andre`; Jettestuen, Espen; Helland, Johan Olav
(2016)
Level-set simulation of capillary-controlled displacement on the pore scale with mixed wettability.
8th International Conference on Porous Media and Annual Meeting (Interpore 8);
2016-05-09 - 2016-05-12.
Omekeh, Aruoture Voke; Evje, Steinar; Fjelde, Ingebret; Friis, Helmer Andre`
(2011)
Experimental and modeling investigation of ion exchange during low salinity water flooding. SCA2011-038.
International Symp. Society of Core Analysts;
2011-09-18 - 2011-09-21.