Blar i NORCE vitenarkiv på forfatter "Helland, Johan Olav"
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A Discrete-Domain Approach to Three-Phase Hysteresis in Porous Media
Helland, Johan Olav; Jettestuen, Espen; Friis, Helmer Andre` (Peer reviewed; Journal article, 2021)We present a discrete-domain approach to three-phase displacements and hysteresis in porous media. In this method, constrained energy minimization leads to evolution equations for local saturations that describe a wide ... -
A locally conservative multiphase level set method for capillary-controlled displacements in porous media
Jettestuen, Espen; Friis, Helmer Andre`; Helland, Johan Olav (Peer reviewed; Journal article, 2021)We present a multiphase level set method with local volume conservation for capillary-controlled displacement in porous structures. Standard numerical formulations of the level set method for capillary-controlled (or, ... -
Pore-scale modelling of three-phase capillary pressure curves directly in uniformly wet rock images
Zhou, Yingfang; Hatzignatiou, Dimitrios Georgios; Helland, Johan Olav; Yulong, Zhao; Cai, Jianchao (Journal article; Peer reviewed, 2021)In this work, we developed a semianalytical model to compute three-phase capillary pressure curves and associated fluid configurations for gas invasion in uniformly wet rock images. The fluid configurations and favorable ...