Spring08Final - PGE 312 - SPRING 2008 Physical and Chemical...

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PGE 312 - SPRING 2008 Physical and Chemical Behavior of Petroleum Fluids I Final Examination, 3 Hours It will be in your best interest to attempt all the questions. Please budget your time accordingly. Problem 1 (10 points) Determine the density of the following hydrocarbon liquid at standard temperature and pressure. The liquid specific gravities of the components at 60 ° F and 14.7 psia are given in Table 1 along with other pertinent information. Table 1 Component Liquid Composition (mole fraction) Molecular Weight (lbmass/lb mole) Component Specific Gravity n-Pentane 0.10 72 0.6311 n-Hexane 0.25 86 0.6638 Heptane + 0.65 218 0.8515 1.00 1
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Problem 2 (10 points) Flash vaporization tests have been performed on two oil samples at the same temperature. Sample A is from a black oil reservoir and Sample B is from a volatile oil reservoir. Both samples have the same bubble point pressure of 4000 psig at the reservoir temperature. The same volume of each sample was charged into the PVT cell and the pressure was adjusted to the bubble point pressure of 4000 psia. The volume of each oil sample at bubble point pressure is V b . Each sample was then expanded below the bubble point pressure in steps of –200 psi down to 3000 psig. At each step, the volume of oil in the PVT cell (V o ) was measured. Sketch graphs to show how you expect the % oil volume (V o /V b expressed as a percentage) to vary with pressure for each sample as it is expanded from 4000 psig to 3000 psig. Sketch your graphs on Figure 1, clearly identifying which graph belongs to the black oil sample (Sample A) and which belongs to the volatile oil sample (Sample B). 0 10 20 30 40 50 60 70 80 90 100 3000 3200 3400 3600 3800 4000 Pressure (psig) Volume % of Oil Figure 1 Problem 3 (20 points) 2
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The ABC Oil Company of Houston has discovered a retrograde condensate gas reservoir. As one of its bright summer interns, you have been selected to advise management on the
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This note was uploaded on 04/21/2010 for the course PGE 312 taught by Professor Peters during the Spring '08 term at University of Texas at Austin.

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Spring08Final - PGE 312 - SPRING 2008 Physical and Chemical...

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