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2003 Course Reservoir Engineering - I

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Total No. of Questions : 8] P1339 [Total No. of Pages :7 [3864] - 341 B.E. (Petroleum Engineering) RESERVOIR ENGINEERING - I (2003 Course) (412381) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the two sections should be written in separate answer books. 2) Questions No.1 (One) and 8 (eight) are compulsory. 3) Figures to the right indicate full marks. 4) Neat diagrams must be drawn wherever necessary. 5) Use of a non-programmable calculator, log-log semi-log paper is allowed. 6) Assume suitable data, if necessary. 7) If you attempt question 7, detach Figure 1 & 2 and attach inside the answer booklet. 8) If you attempt question 8, detach Figure 1 and attach inside the answer booklet. SECTION - I Q1) a) What are the activities of a reservoir engineer? [6] b) Explain in detail classification of reserves and how are they are calculated?[6] c) Which drive index has the highest value, explain with the help of an equation? [6] Q2) a) Derive the material balance equation for an undersaturated reservoir considering rock and fluid expansion. [7] b) An undersaturated reservoir producing above the buble point had an initial pressure of 5000 psia, at which pressure Bo was 1.510 bbl/STB. When the pressure dropped to 4600 psia, owing to the production of 100,000 STB of oil, the Bo was 1.52. The connate water saturation was 25%, water compressibility 3.2E 6/psi and porosity was 16%, rock compressibility was 4.0E-6. Average compressibility of oil between 5000 and 4600 psia relative to volume at 5000 is 17E-6. i) Assuming a volumetric reservoir, calculate IOIP ii) It was desired to inventory the initial stock tank barrels in place at the second production interval. When the pressure had dropped to 4200 psia, Bo was 1.531, 205 M STB had been produced. If average compressibility was 17.65E-6, what was IOIP. P.T.O.

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