(Solved): 4. (40 points) The capillary pressure curve of a formation at reservoir conditions is given in Fig ...

4. (40 points) The capillary pressure curve of a formation at reservoir conditions is given in Fig 2. The reservoir is in capillary equilibrium when discovered and the rock is determined to be water wet. The oil-water contact is located at 5000 ft. The thickness of the formation above the oil-water contact is 300 ft. At reservoir conditions water density is 62 lbm/ft³ and oil density is 44 lbm/ft³. . (5 points) Would you use imbibition or drainage curve to plot water saturation as a function of elevation above the water-oil contact? Why? . (5 points) What is the threshold pressure? . (5 points) Estimate the depth of Free Water Level. . (15 points) Estimate the depth below which water saturation is higher than 60 percent. 25 20 Capillary Pressure, psi 15 10 5 0 Drainage Imbibition 20 0 40 60 80 Water Saturation, % Figure 2: Capillary Pressure curve at reservoir conditions. 100