A wet gas is produced through a two-stage separator system. Separator conditions are 580 psia and 95°F. The stock tank is at 80°F. Gas-oil ratios for separator and stock tank are 98835 sef/STB and 408 scf/STB. The stock-tank liquid has a gravity of 59.3°API. The compositions of the surface production are given in the table below. (a) Calculate the composition of the reservoir gas. (b) Calculate wet gas formation volume factor at reservoir conditions of 2250 psig and 200 °F. (c) Calculate wet gas isothermal compressibility factor at reservoir conditions of 2250 psig and 200 °F. Component Composition Composition Composition

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A wet gas is produced through a two-stage separator system. Separator conditions are 580 psia
and 95°F. The stock tank is at 80°F. Gas-oil ratios for separator and stock tank are 98835
scf/STB and 408 scf/STB. The stock-tank liquid has a gravity of 59.3°API. The compositions
of the surface production are given in the table below.
(a) Calculate the composition of the reservoir gas.
(b) Calculate wet gas formation volume factor at reservoir conditions of 2250 psig and 200 °F.
(c) Calculate wet gas isothermal compressibility factor at reservoir conditions of 2250 psig and
200 °F.
Composition,
Separator Gas,
Mole fraction
Composition,
Stock-tank Liquid,
Component
Composition,
Stock-tank Gas,
Mole fraction
Mole fraction
0.8814
0.4795
0.0026
C2
0.0730
0.1769
0.0054
0.1755
0.0194
C3
i-C4
n-C4
0.0297
0.0054
0.0490
0.0148
0.0045
0.0023
0.0466
0.0193
i-Cs
n-Cs
0.0293
0.0312
0.0017
0.0222
0.0293
C6
0.0016
0.0190
0.0902
C7+
0.0004
0.0020
0.7878
Properties of heptanes plus of the stock-tank liquid:
Specific gravity
Molecular Weight
0.798
111 lb/lb mole
All steps of the calculations should be shown.
Transcribed Image Text:A wet gas is produced through a two-stage separator system. Separator conditions are 580 psia and 95°F. The stock tank is at 80°F. Gas-oil ratios for separator and stock tank are 98835 scf/STB and 408 scf/STB. The stock-tank liquid has a gravity of 59.3°API. The compositions of the surface production are given in the table below. (a) Calculate the composition of the reservoir gas. (b) Calculate wet gas formation volume factor at reservoir conditions of 2250 psig and 200 °F. (c) Calculate wet gas isothermal compressibility factor at reservoir conditions of 2250 psig and 200 °F. Composition, Separator Gas, Mole fraction Composition, Stock-tank Liquid, Component Composition, Stock-tank Gas, Mole fraction Mole fraction 0.8814 0.4795 0.0026 C2 0.0730 0.1769 0.0054 0.1755 0.0194 C3 i-C4 n-C4 0.0297 0.0054 0.0490 0.0148 0.0045 0.0023 0.0466 0.0193 i-Cs n-Cs 0.0293 0.0312 0.0017 0.0222 0.0293 C6 0.0016 0.0190 0.0902 C7+ 0.0004 0.0020 0.7878 Properties of heptanes plus of the stock-tank liquid: Specific gravity Molecular Weight 0.798 111 lb/lb mole All steps of the calculations should be shown.
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