PE 453 EXAM-2 fall2007 - AL-FATAH UNIVERSITY Faculty Of...

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AL-FATAH UNIVERSITY Faculty Of Engineering Department Of Petroleum Engineering Applied Reservoir Eng. (PE-453) Mid-Term Exam. #2 ( Fall 2007) _____________________________________________________________________ _____ 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 = 210 scf/stb @ Pb = 1200 psi, Bo @ Pb = 1.4509 bbl/stb Cw = 3.6x10 -6 cf = 8.6x10 -6 Swi = 0.25 Oil prod (Np) = 10.2 MMSTB Calculate: a- Initial oil (Ni) & Recovery factor (RF) at Pb pressure with considering effect of rock and water compressibility. b- Initial oil (Ni) & Recovery factor (RF) , with neglecting effect of compressibility. c- Which result ( a or b ) is more reliable and why ? d- What would be the gas production GP, when pressure drops to 1200 psi. Q-2 For an oil reservoir with gas cap. If the total IGIP was 270x10 9 scf and IOIP was 310x10 6 stb., using (Bgi) = 0.00578 cf/csf, (Boi) = 1.38 bbl/stb, Rsoi = 520 scf/stb.
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