Helmer André Friis | University of Stavanger

Contact

Email: helmer.a.friis@uis.no

Department

Faculty of Science and Technology

Department of Energy and Petroleum Engineering

Publications

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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.
  
  DOI: 10.1016/j.advwatres.2024.104688
- 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.
  
  DOI: 10.1021/acs.energyfuels.3c05163
- 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.
  
  DOI: 10.1016/j.jcis.2023.05.070
- 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.
  
  DOI: 10.1007/s10596-023-10219-0
- 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.
  
  DOI: 10.1021/acs.energyfuels.3c03382
- 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.
  
  DOI: 10.1088/1757-899X/1294/1/012058
- 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.
  
  DOI: 10.1007/s11242-022-01859-4
- 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.
  
  DOI: 10.1016/j.jcp.2020.109965
- 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.
  
  DOI: 10.1007/s11242-019-01238-6
- 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.
  
  DOI: 10.1016/j.ces.2019.03.060
- 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.
  
  DOI: 10.3997/2214-4609.201900709
- 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.
  
  DOI: 10.1016/j.imu.2019.100175
- 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.
  
  DOI: 10.1145/3219753.3219761
- 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.
  
  DOI: 10.3997/2214-4609.201803215
- 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.
  
  DOI: 10.4236/ijg.2017.82010
- 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.
  
  DOI: 10.1145/3219753.3219761
- 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.
  
  DOI: 10.1615/JPorMedia.v18.i3.20
- 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.
  
  DOI: 10.1016/S0252-9602(13)60130-7
- 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.
  
  DOI: 10.1016/j.jde.2013.02.001
- 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.
  
  DOI: 10.1016/j.jcp.2010.09.012
- 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.
Bøker og kapitler
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.
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