AL-FATAH UNIVERSIY Faculty Of Engineering Department 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 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 Pb = 1725 psi, Bo @ Pb = 1.4509 bbl/stb Cw = 3.6x10 -6 cf = 8.6x10 -6 Swi = 0.25 Oil prod (Np) = 7.3 MMSTB Calculate: a- Recovery factor to Pb pressure and Initial oil (Ni) considering effect of compressibility b- Recovery factor to Pb pressure and Initial oil (Ni) , Neglecting effect of rock and water compressibility. c- Which result ( a or b ) is more reliable and why ? d- What is the produced gas (RF) when pressure drops to 1725 psi for point ( a )? Q-2 The following set of data is given for saturated combined drives reservoir: Pi = 3470 psi, Bgi = 0.00637 cf/scf, Rsoi = 600 scf/stb, Boi = 1.3126 bbl/stb, m = 0.224 After 3 years of production, this date was obtained: P Bg Bt NP RP WE WP Bw (psi) (cf/scf) (bbl/stb) (MM stb) scf/stb (MMcf)
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