caa a22 4500 463162528 CHVBK 20180406164751.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s11242-006-9088-x doi (NATIONALLICENCE)springer-10.1007/s11242-006-9088-x Fluid flow properties for different classes of intermediate wettability as studied by network modelling [Elektronische Daten] [Linda Høiland, Kristine Spildo, Arne Skauge] Most clastic reservoirs display an intermediate type of wettability. Intermediate wettability covers several local wetting configurations like fractional wet and mixed-wet where the oil-wet sites could either be in the large or smaller pores. Clastic reservoirs show a large variation in fluid flow properties. A classical invasion-percolation network simulator is used to investigate properties of different intermediate wet situations. Variation in wetting properties like contact angles, process dependent contact angles, contact angle distribution, and fraction of oil wet sites are investigated. The fluid flow properties analysed in particular are residual oil saturation and normalized endpoint relative permeability. Results from network modelling have been compared to reservoir core analysis data. The network models applied are at the capillary limit, while the core flood results are clearly viscous influenced. Even though network modelling does not cover all the physics involved in fluid displacement processes, results show that data from simulations are sufficient to present trends in fluid flow properties which are comparable to experimental data. Springer Science+Business Media, Inc., 2007 Intermediate wettability nationallicence Amott-Harvey nationallicence USBM nationallicence Oil-Wet fraction nationallicence Contact angle hysteresis nationallicence Residual oil saturation nationallicence Sor : Residual oil saturation nationallicence Swi : Irreducible water saturation nationallicence Krw(Sor) : End-point relative permeability nationallicence MWL : Mixed wet large nationallicence FW : Fractional wet nationallicence MWS : Mixed wet small nationallicence I o : Oil wettability index nationallicence I w : Water wettability index nationallicence I AH : Amott Harvey wettability index (I w-I o) nationallicence I USBM : USBM wettability index nationallicence α : Oil-wet fraction nationallicence α num : Oil-wet fraction by number nationallicence α vol : Oil-wet fraction by volume nationallicence α crit : Critical oil-wet fraction nationallicence α num,crit : Critical oil-wet fraction by number nationallicence αvol,crit : Critical oil-wet fraction by number nationallicence θ : Contact angle nationallicence θ ww : Contact angle in the water-wet pores nationallicence θ ow : Contact angle in the oil-wet pores nationallicence θ a : Advancing contact angle nationallicence θ cw : Critical water-wet contact angle nationallicence θ co : Critical oil-wet contact angle nationallicence r : Radius nationallicence σ ow : Interfacial tension between oil and water nationallicence β : Angle of pore corner nationallicence P c : Capillary pressure nationallicence P o : Pressure oil phase nationallicence P w : Pressure water phase nationallicence A i : Arbitrary numbers nationallicence x i : Random number between 0 and 1 nationallicence Δ S ws : Change in water saturation during spontaneous water imbibition nationallicence Δ S wf : Change in water saturation during forced water imbibition nationallicence Δ S os : Change in oil saturation during spontaneous oil imbibition nationallicence Δ S of : Change in oil saturation during forced water imbibition nationallicence A : Area under curve nationallicence D : Network dimension nationallicence z : Co-ordination number nationallicence Høiland Linda Center for Integrated Petroleum Research, Allègaten 41, 5007, Bergen, Norway aut Spildo Kristine Center for Integrated Petroleum Research, Allègaten 41, 5007, Bergen, Norway aut Skauge Arne Center for Integrated Petroleum Research, Allègaten 41, 5007, Bergen, Norway aut Transport in Porous Media Springer Netherlands 70/1(2007-10-01), 127-146 0169-3913 70:1<127 2007 70 11242 https://doi.org/10.1007/s11242-006-9088-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11242-006-9088-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Høiland Linda Center for Integrated Petroleum Research, Allègaten 41, 5007, Bergen, Norway aut NATIONALLICENCE 700 1- Spildo Kristine Center for Integrated Petroleum Research, Allègaten 41, 5007, Bergen, Norway aut NATIONALLICENCE 700 1- Skauge Arne Center for Integrated Petroleum Research, Allègaten 41, 5007, Bergen, Norway aut NATIONALLICENCE 773 0- Transport in Porous Media Springer Netherlands 70/1(2007-10-01), 127-146 0169-3913 70:1<127 2007 70 11242 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer