MODELING OF LOW SALINITY EFFECTS IN SANDSTONE OIL ...

32 REFERENCESIons FW IW[mol/l] [mol/l]Na + 1.3262 1.0610Cl − 1.6569 1.3255Ca 2+ 0.1479 0.1183Mg 2+ 0.0175 0.0140SO 2−4 0.0000 0.0000Ion Strength I 0 1.8224 1.4578Table 4. Composition of the formation water and the different brines used forExample 3.APPENDIX B: DATA FOR WATER-OIL FLOW FUNCTIONSHigh salinity conditions. The following set of values for oil-wet conditions is used:(97)k ∗,ow = 0.3, k ∗,owo= 0.75, s owwr = 0.15, s owor = 0.3, Nk ow = 3, Nk owo = 2.Applying these values in (14) the following two relative permeability curves are obtainedk ow (s; s owwr, s owor ),koow (s; s owwr, s owor ),for s owwr ≤ s ≤ 1 − s owor .Low salinity conditions. The following set of values for water-wet conditions is used:(98)k ∗,ww = 0.4, k ∗,wwo=0.9, s wwwr= 0.15, s wworThese choices give corresponding relative permeability curvesk ww (s; s wwwr , s wwor ),koww (s; s wwwr , s wwor ),= 0.15, Nk ww = 3, Nk wwo = 2.for s wwwr≤ s ≤ 1 − s wwor .International Research Institute of Stavanger, P.O.Box 8046, 4068 Stavanger, Norway.E-mail: Aruoture.Voke.Omekeh@iris.noUniversity of Stavanger (UiS), 4036 Stavanger, Norway.E-mail: Steinar.Evje@uis.noInternational Research Institute of Stavanger, P.O.Box 8046, 4068 Stavanger, Norway.E-mail: HelmerAndre.Friis@iris.no