# Ch. 8 c - 1/4 PGE 312 Physical and Chemical Behavior of...

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1/4 PGE 312 Physical and Chemical Behavior of Petroleum Fluids I Homework #7 Solution Key 8-2: API API API o o o o 21 . 30 5 . 131 875 . 0 5 . 141 5 . 131 5 . 141 = - = - = γ 8-4: 7913 . 0 5 . 131 3 . 47 5 . 141 5 . 131 5 . 141 5 . 131 5 . 141 = + = + = - = API API API o o o o o 8-7: B o = V o V sto = 227.0 cc 167.4 cc = 1.36 res bbl STB The solution gas ratio is given by: 0.596 566.1 167.4 6.2898 ( 6) / s scf scf R ST cc E bbl cc STB = = - 8-9: Oil formation volume factor is given by: B o = V o V sto = 86.3 res bbl 57.9 STB = 1.49 res bbl STB Solution gas-oil ratio: (43150 7240) 870.3 57.9 Vg scf scf Rs Vsto STB STB + = = =

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2/4 At bubble point, only Rs is valid since Rs is constant after bubble point pressure. 8-10: Oil Formation Volume Factor vs. Pressure 1.00 1.2 1.25 1.3 1.35 1.4 1.45 1.5 1.55 1.6 0 1000 2000 3000 4000 5000 6000 Pressure (psig) Both the graphs are similar to Figures 8-1 and 8-2. The pressure is decreased from 5000 psig. The Oil Formation Volume Factor graph is increases to a maximum value at the
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Ch. 8 c - 1/4 PGE 312 Physical and Chemical Behavior of...

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