PE 453 EXAM-2 spring2008 - 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 ( Spring 2008) General Form of MBE : BwWp Bg Rsoi Rp Bt Np We p Swi cf cwSwi NBti m Bgi Bg Bgi NmBti Bti Bt N ] ) ( [ ) ( 1 1 ) ( Q-1 Given the following data for undersaturated volumetric reservoir: Pi = 3100 psi Boi = 1.3628 bbl/stb Rsoi = 110 scf/stb Pb = 780 psi, Current Press: 2400 psi, Bo= 1.3875 bbl/stb, Cw = 3.6x10 -6 cf = 8.6x10 -6 Swi = 0.25 Oil prod (Np) = 17.2 MMSTB Calculate: a- Initial oil (Ni) and Recovery factor at current pressure considering effect of compressibility. b- Initial oil (Ni) at current pressure ignoring effect of compressibility. c- Which result ( a or b ) is more accurate and why ? Q-2 The following data is given for an undersaturated oil reservoir: Pi = 2800 psi, m = 0 Rsoi = 625 scf/stb, Boi = 1.340 bbl/stb @ 1650 psi : 18% of IOIP has been produced, WE = 0 , WP = 0. Bo = 1.2 bbl/stb, Rs = 125 scf/stb , Bg = 0.00718 cf/scf, Res. Temp = 180 CALCULATE: (a) - The cumulative produced gas oil ratio RP.
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