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C027 Experimental & Numerical Investigation of Cap. Press. Hyst on Iranian Carbonate Rock S.M. Hashemi* (National Iranian Oil Co.-RIPI) H. Karimaie (Norwegia Tech Trondheim (NTNU)) M.R. Esfahani (National Iranian Oil Co.-RIP (National Iranian Oil Co.-RIPI) SUMMARY In this study several experiments were performed on an Iranian carb rock. The bounding imbibition and drainage capillary pressure and sc were determined using a novel experimental setup at high temperat highly accurate measurements of capillary pressure hysteresis on a w show that there is significant hysteresis in capillary pressure bet imbibition curves. Killough and Tan models representing capillary pre based on saturation history