Test2Fall08 - 1 PGE 312 - FALL 2008 Physical and Chemical...

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1 PGE 312 - FALL 2008 Physical and Chemical Behavior of Petroleum Fluids I Test #2, 50 Minutes Closed Book Note: It will be in your best interest to attempt all the questions. Please budget your time accordingly. Problem 1 (30 points) Figure 1 shows an idealized saturated oil reservoir with a gas cap (free gas). Because the oil and the free gas in the gas cap are in phase equilibrium, the oil is at its bubble point and the gas cap gas is at its dew point. Therefore, the initial reservoir pressure of 4000 psia is the bubble point pressure of the oil and the dew point pressure of the gas cap gas at the reservoir temperature of 200 ˚F. Oil Zone Gas Cap Figure 1. Idealized saturated oil reservoir. A sample of the gas cap gas and a sample of the reservoir oil were sent to a PVT Lab for measurements. The results were as follows: Stock tank oil API gravity = 35º API Oil formation volume factor at initial conditions = 1.25 reservoir barrels/STB
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2 Table 1 shows the fluid compositions returned by the PVT Lab. Unfortunately, the PVT
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This note was uploaded on 12/14/2011 for the course PGE 312 taught by Professor Peters during the Spring '08 term at University of Texas at Austin.

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Test2Fall08 - 1 PGE 312 - FALL 2008 Physical and Chemical...

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