PE 453 EXAM-2 spring2009 - 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 2009) _____________________________________________________________________ _____ 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 = 3000 psi Boi = 1.4245 bbl/stb, Rsoi = 330 scf/stb Pb = 1725 psi, Bo @ Pb = 1.4509 bbl/stb Cw = 3.6x10 -6 cf = 8.6x10 -6 Swi = 0.25 Oil prod (Np) = 6.5 MMSTB Calculate: a- Ni & RF at Pb pressure considering effect of compressibility b- the produced gas (RF) when pressure drops to 1725 psi c- Initial oil (Ni) , at Pb by neglecting effect of compressibility., Which result ( a or c ) is more reliable and why ? Q-2 Saturated oil reservoir has a volume of bulk oil zone of 700 x10 6 bbl and volume bulk gas zone of 1.18 x10 9 cf, initial free gas of 202x 10 9 scf, IOIP of 620 x 10 6 stb, Bgi = 0.00569 cf/scf, Rsoi = 375 scf/stb , CALCULATE: (a) - The (m) ratio, (b) – Initial oil formation volume factor Boi , (c) –
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