4. A dry gas field is producing at an average pressure of 1,500 psia and 185F. The daily gas production is 50 MMSCF/day, this field is also producing water at a rate of 1,000 STB/day. The molecular weight of water is 18 Ib/Ibmol and its density at standard conditions is 62.4 lb/ft? The following experimental data was taken from a mixture of this gas with pure water at the reservoir pressure and temperature. MWw= 18 lb/Ibmol 5.6145, 0.17811 (bbl 1 ft) Vng(Ts Ps) = 380 SCF/1bmol Component Mole % Gas Phase Mole % Aqueous Phase Additional Properties at P=1,500 psia and T-185F Ar+60.5549 lb/ft? 0.710 99.843 H2O Z=0.9260 1.957 0.032 CO C 94.353 2.981 0.122 0.003 63 Estimate: a) Amount of water in pounds per day that needs to be removed from the gas produced (6 points) b) Additional amount of methane in SCF/day that can be recovered from the produced water. 16 points) c) If the reservoir brine has a salinity of 5% TDS the amount of gas dissolved in the brine will be (3 points) Q. Lower b. Higher c. The same 4. A dry gas field is producing at an average pressure of 1,500 psia and 185F. The daily gas production is 50 MMSCF/day, this field is also producing water at a rate of 1,000 STB/day. The molecular weight of water is 18 Ib/Ibmol and its density at standard conditions is 62.4 lb/ft? The following experimental data was taken from a mixture of this gas with pure water at the reservoir pressure and temperature. MWw= 18 lb/Ibmol 5.6145, 0.17811 (bbl 1 ft) Vng(Ts Ps) = 380 SCF/1bmol Component Mole % Gas Phase Mole % Aqueous Phase Additional Properties at P=1,500 psia and T-185F Ar+60.5549 lb/ft? 0.710 99.843 H2O Z=0.9260 1.957 0.032 CO C 94.353 2.981 0.122 0.003 63 Estimate: a) Amount of water in pounds per day that needs to be removed from the gas produced (6 points) b) Additional amount of methane in SCF/day that can be recovered from the produced water. 16 points) c) If the reservoir brine has a salinity of 5% TDS the amount of gas dissolved in the brine will be (3 points) Q. Lower b. Higher c. The same