caa a22 4500 463163079 CHVBK 20180406164753.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s11242-006-0026-8 doi (NATIONALLICENCE)springer-10.1007/s11242-006-0026-8 Effect of network topology on two-phase imbibition relative permeability [Elektronische Daten] [Walid Mahmud, Ji Arns, Adrian Sheppard, Mark Knackstedt, W. Pinczewski] In a previous study Arns et al. (2004, Transport Porous Media 55, 21-46) we considered the role of topology on drainage relative permeability curves computed using network models derived from a suite of tomographic images of Fontainebleau sandstone. The present study extends the analysis to more complex imbibition displacements where the non-wetting fluid can be disconnected by snap-off as a result of swelling of wetting films in the corners of pores and throats. In contrast to the findings for drainage displacements which showed that relative permeabilities are significantly affected by network topology, the present study shows that the effect of topology on imbibition relative permeabilities depends on the level of snap-off. For strongly wetting conditions where snap-off dominates the displacement the effect of network topology is significantly smaller than for weakly wet conditions where snap-off is suppressed. For contact angles sufficiently large to completely suppress snap-off, the effect of topology on imbibition relative permeabilities is similar to that for drainage displacements. The findings are valid for random networks and for networks displaying short-range pore-throat and longer range spatial correlations. Springer Science+Business Media B.V., 2007 Two-phase flow nationallicence Imbibition nationallicence Relative permeability nationallicence Network models nationallicence Topology nationallicence Mahmud Walid School of Petroleum Engineering, The University of New South Wales, Sydney, NSW, Australia aut Arns Ji School of Petroleum Engineering, The University of New South Wales, Sydney, NSW, Australia aut Sheppard Adrian Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT, Australia aut Knackstedt Mark Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT, Australia aut Pinczewski W. School of Petroleum Engineering, The University of New South Wales, Sydney, NSW, Australia aut Transport in Porous Media Kluwer Academic Publishers 66/3(2007-02-01), 481-493 0169-3913 66:3<481 2007 66 11242 https://doi.org/10.1007/s11242-006-0026-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11242-006-0026-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mahmud Walid School of Petroleum Engineering, The University of New South Wales, Sydney, NSW, Australia aut NATIONALLICENCE 700 1- Arns Ji School of Petroleum Engineering, The University of New South Wales, Sydney, NSW, Australia aut NATIONALLICENCE 700 1- Sheppard Adrian Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT, Australia aut NATIONALLICENCE 700 1- Knackstedt Mark Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT, Australia aut NATIONALLICENCE 700 1- Pinczewski W. School of Petroleum Engineering, The University of New South Wales, Sydney, NSW, Australia aut NATIONALLICENCE 773 0- Transport in Porous Media Kluwer Academic Publishers 66/3(2007-02-01), 481-493 0169-3913 66:3<481 2007 66 11242 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer