HW_9_solution

# HW_9_solution - PGE 312 – Physical and Chemical Behavior...

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Unformatted text preview: PGE 312 – Physical and Chemical Behavior of Petroleum Fluids I Homework 9, Fall 2007 Problem 9-1 The given data is plotted and then a line of best fit is drawn through the pressure and GOR data. This is shown in the figure below: From the figure, Bubble Point Pressure = 2,000psia GOR = 520 scf/STB From Fig. 9-3, the correction for stock tank vent gas is 80scf/STB Therefore, R sb = 520 + 80 = 600 scf/STB Therefore, calculating the errors in P b and R s , % 692 . 3 100 623 623 600 % 734 . 3 100 2000 2000 1928 s b R in Error P in Error Problem 11-1 Using the given information, From Fig. 11-1, P b = 3,400 psia Problem 11-3 The following table is generated from Figure 11-1 by using the provided data. Reservoir Pressure (psia) Gas Oil Ratio (scf) 3,150 880 2,650 720 2,150 550 1,650 410 1,150 275 650 135 150 - Problem 11-6 ft cu lbs water e hep / 196 . 53 4 . 62 8525 . tan Component Mole Fraction Molecular Weight Mass (lb) Liquid Density at Standard Conditions (lb/ft 3 ) Liquid Volume, (ft 3 ) x j M j x j M j ρ oj x j M j /ρ oj n-Pentane 0.225 72.2 16.2 39.360 0.4127 Hexanes 0.425 86.2 36.6 41.400 0.8849 Heptanes + 0.350 219.0 76.7 53.196 1.4409 1.000 129.5 2.7385 ft cu lbs Volume mass liquid liquid / 3 . 47 7385 . 2 5 . 129 Problem 11-9 ft cu lbs water e hep / 04 . 53 4 . 62 85 . tan Component Mole Fraction Molecular Weight Mass (lb) Liquid Density at Standard Conditions (lb/ft 3 ) Liquid Volume, (ft 3 ) x j M j x j M j ρ oj x j M j/ ρ oj Hydrogen Sulfide 0.000 34.080 0.00 Carbon dioxide 0.027 44.010 1.19 Nitorgen 0.001 28.013 0.03 Methane 0.211 16.043 3.39 Ethane 0.076 30.070 2.29 Propane 0.158 44.097 6.98 31.62 0.2206 i-Butane 0.015 58.123 0.85 35.11 0.0243 n-Butane 0.043 58.123 2.49 36.42 0.0683 i-Pentane 0.017 72.150 1.23 38.96 0.0317 n-Pentane 0.024 72.150 1.71 39.36 0.0434 Hexanes 0.025 86.177 2.14 41.40 0.0516 Heptanes + 0.403 215.000 86.71 53.04 1.6348 109.00 2.0748 3 / 2 . 49 843 . 2 13 . 126 3 ft lbs c % 49 . 2 100 136 39 . 3 1 % 76 . 1 100 ) 19 . 1 39 . 3 136 ( ) 03 . 29 . 2 ( 2 1 2 1 2 2...
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HW_9_solution - PGE 312 – Physical and Chemical Behavior...

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