PE 453 EXAM-2 Fall2009 - AL-FATAH UNIVERSIY Faculty Of...

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AL-FATAH UNIVERSIY Faculty Of Engineering Department Of Petroleum Engineering Applied Reservoir Eng. (PE-453) Mid-Term Exam. #2 ( Fall 2009) Q-1 An undersaturated oil reservoir has the following data: Pi = 2800 psi Boi = 1.375 bbl/stb Rsoi = 240 scf/stb, Pb = 1200 psi, Current Res. Press: 2000 psi, Bo= 1.3877 bbl/stb, Cw = 3.6x10 -6 cf = 8.6x10 -6 , Swi =0.25 Np = 9.58 MMSTB, We = 0, Wp = 0 Calculate: a- Ni and RF at 2000 psi : 1- considering effect of compressibility. 2- Ignoring compressibility Which result is more correct b- Bo at Pb, assuming constant oil expansion Q-2 The following data is given for an undersaturated oil reservoir: Pi = 3100 psi, Rsoi = 625 scf/stb, Boi = 1.340 bbl/stb @ 1550 psi : 22% of IOIP was produced, WE = 0 , WP = 0. Bo = 1.2 bbl/stb, Rs = 125 scf/stb, Bg = 0.00718 cf/scf, Res. Temp = 200F 0 CALCULATE: (a) - The cumulative produced gas oil ratio (RP). (b) – The Initial Gas In Place (IGIP) if cumulative gas production was 90 x10 9 Scf. (c) – If the reservoir pressure dropped to atmospheric, calculate the Bo using Temp. Coefficient of oil expansion 0.0006 Q-3
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