Table 2. contains the cumulative oil production Np. and cumulative gas oil raio, Rp. as function of the average reservoir pressure over the first 10 years of production for a gas cap reservoir. Odeh approach to solve for the initial oil and gas (both free and solution) in place Use the Havlena- Table 2. Pressure psia Bo, bbl/STB Rso, SCF/STB Bg, bbl/SCF Np, MM STB Rp, SCF/STB 3330 1.2511 510 0.00087- 3150 1.2353 477 0.00092 3.295 1050 3000 1.2222 450 0.00096 5.903 1060 2850 1.2122 425 0.00101 8.852 1160 2700 1.2022 401 0.00107 11.503 1235 2550 1.1922 375 0.00113 14.513 1265 2400 1.1822 352 0.00120 17.730 1300