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Spr05Test1_key

Spr05Test1_key - e e g n y n = = = 2 3 Problem 2 25 points...

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1 PGE 312 - SPRING 2005 Physical and Chemical Behavior of Petroleum Fluids I Test 1 Solution Key Problem 1 ( 25 points ) A binary mixture of 84 moles of ethane and 36 moles of n-heptane is confined in a vessel at P = 300psia and T = 260 F. Determine ˚ a. The moles of gas in the vessel if any. At the given pressure and temperature, there are two phases present. Using the properties of Ethane, 0.20 0.70 0.7576 0.20 0.86 g i i g i i n x z n n x y - - = = = = - - * (0.7576)(120) 90.91 moles of gas g g n n n = = = Alternatively, using the properties of n-Heptane, 0.80 0.30 0.7576 0.80 0.14 g i i g i i n x z n n x y - - = = = = - - * (0.7576)(120) 90.91 moles of gas g g n n n = = = b. The composition of the gas expressed in mole fractions. The gas composition is read at the intersection of the tie line with the dew point curve and is given by 0.86 0.14 e h y y y = = c. The moles of ethane in the gas. For ethane, e e g n y n = * (0.86)(90.91) 78.18 moles of ethane in the gas.

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Unformatted text preview: e e g n y n = = = 2 3 Problem 2 ( 25 points ) a. Name the five types of reservoir fluids in petroleum accumulations: 1. Black oil 2. Volatile oil 3. Retrograde condensate gas 4. Wet gas 5. Dry gas b. Table 1 shows the fluid compositions from three petroleum accumulations. Match each fluid with the type of reservoir fluid you identified in part a. Write your answer in the table below: Fluid Reservoir Fluid Classification Fluid 1 Volatile oil Fluid 2 Black oil Fluid 3 Dry gas Table 1. Compositions of Three Petroleum Reservoir Fluids (Mole%) Component Fluid 1 Fluid 2 Fluid 3 C 1 64.36 48.83 95.85 C 2 7.52 2.75 2.67 C 3 4.74 1.93 0.76 C 4 4.12 1.60 0.52 C 5 2.97 1.15 0.20 C 6 1.38 1.59 C 7+ 14.91 42.15 Total 100.00 100.00 100.00 4 5...
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Spr05Test1_key - e e g n y n = = = 2 3 Problem 2 25 points...

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