PE 453 EXAM2a - AL-FATAH UNIVERSIY Faculty Of Engineering...

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AL-FATAH UNIVERSIY Faculty Of Engineering Department Of Petroleum Engineering Applied Reservoir Eng. (PE-453) Mid-Term Exam. #2 ( Fall 2005) 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 Assume you have an oil reservoir with gas cap. If the total IGIP (free & dissolved) was 345x10 9 scf and IOIP was 420x10 6 stb with initial dissolved gas of 130x10 9 scf , using (Bgi) = 0.00578 cf/csf, (Boi) = 1.38 bbl/stb Calculate the ratio of reservoir gas volume to reservoir oil volume ( m ). Q-2 The following data are given for saturated combined drives reservoir: Pi = 3000 psi, Bgi = 0.00637 cf/scf, Rsoi = 600 scf/stb, Boi = 1.3126 bbl/stb m = 0.224 After one year of production, this date was obtained: P Bg Bt NP RP WE-WP (psi) (cf/scf) (bbl/stb) (MM stb) scf/stb (MMCF) 2100 0.0069 1.3375 32 1070 178 (a) - Calculate: 1. Initial oil in place (Ni): 2. The drive mechanisms DDI & WDI (b) - Is the gas segregation drive (SDI) considered the most effective drive for this reservoir? Q-3 (a ) If the initial hydrocarbon (oil) pore volume
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