PE 453 EXAM-2 spring2010 - 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 2010) _____________________________________________________________________ _____ 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 = 3.5x10 -6 cf = 7.5x10 -6 Swi = 0.2 Oil prod (Np) = 17.2 MMSTB Calculate: a- Initial oil (Ni) and Recovery factor at current pressure considering effect of compressibility. b- Percentage % of remaining gas in reservoir at pressure 2400 psi c- Bo at Pb pressure(780 psi) assuming constant oil compressibility above pb. Q-2 The following set of data is given for a saturated oil reservoir: Pi = 3500 psi, Bgi = 0.00637 cf/scf, Rsoi = 600 scf/stb, Boi = 1.3126 bbl/stb, IOIP = 328x10 6 stb , IGIP (free & dissolved)= 319x10 9 scf After 3 years of production, this date was obtained: P Bg Bt NP RSO RP WE WP Bw (psi) (cf/scf) (bbl/stb) (MM stb) scf/stb scf/stb
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