(a) Caleulate the gas deviation factor for the gas-condensate fluid, the composition of which is given in Table 1.3 (from Carft and Hawkins) below at 5820 psia and 265F. Use the critical values of C8 for the C7+ fraction. (b) If half the butanes and all the pentanes and heavier gases are recovered as liquids, calculate the gas-oil ratio of the initial production. Compare with the measured gas-oil ratio. Table 1.3 Mole Composition and Other Properties of Typical Single-Phase Reservoir Fluids Component Black oil Volatile oil Dry gas Wet gas Gas condensate 48.83 64.36 87.07 95.85 86.67 2.75 7.52 4.39 2.67 7.77 C, 1.93 4.74 2.29 0.34 2.95 C. 1.60 4.12 1.74 0.52 1.73 1.15 2.97 0.83 0.08 0.88 C. 1.59 1.38 0.60 0.12 42.15 14.91 3.80 0.42 Total 100.00 100.00 100.00 100.00 100.00 Mol. wt. C; 225 181 112 157 GOR, SCF/ 625 2000 18,200 105,000 Infinite STB Tank gravity, 34.3 54.7 50.1 60.8 API Liquid color Greenish Medium orange Light straw Water white black