PGE_312_spring09_Solution_Key_HW3

PGE_312_spring09_Solution_Key_HW3 - PGE 312 Physical and...

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PGE 312 – Physical and Chemical Behavior of Petroleum Fluids I Homework 3 Problem 5-1 The initial and final condition of reservoir in addition to separator condition is plotted on the above figure. a) Since no liquid will be formed either in the reservoir or on the surface, the reservoir fluid would be classified as dry gas . b) The reservoir fluid exists as gas in the reservoir condition, however at the separator conditions liquid forms. Thus, it would be classified as wet gas . c) As the pressure reduces liquid form at the reservoir temperature. Thus, the reservoir fluid would be classified as retrograde gas . 1 2 Separator
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d) The reservoir condition is close to the critical point of the reservoir fluid. Thus, would be classified as volatile oil. e) The reservoir condition is far from the critical point of the reservoir fluid and it is liquid because the reservoir temperature is less than critical temperature of the fluid. Thus, would be classified as black oil. Other information such as API gravity and Color would help to verify the estimates. Problem 5-2 For Brazos County Buda field Gas Oil Ratio, STB SCF STB SCF GOR 5000 10 50000 = = Since the GOR is over 3300 SCF/STB, the reservoir is classified as retrograde gas . For Giddings field
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PGE_312_spring09_Solution_Key_HW3 - PGE 312 Physical and...

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