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2003 Course Petroleum Formation Evaluation

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Total No. of Questions : 6] P1377 [Total No. of Pages : 2 [3664]-310 B.E. (Petroleum Engineering) PETROLEUM FORMATION EVALUATION (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates : 1) Answers to the questions of both the sections should be written in separate answer books. 2) All questions are compulsory. 3) Draw neat diagrams wherever necessary. SECTION - I Q1) Answer the following in Brief: a) List five petrophysical data sources. [2] b) Distinguish between static and dynamic model of a reservoir. [2] c) What is mud logging? [2] d) What are the data sources in mud logging? [2] e) List the information obtained from conventional core analysis for the benefit of (i) petrophysicist (ii) geologist (iii) reservoir engineer (iv) production engineer. [4] f) Distinguish between wireline logging and LWD. [2] g) List four important applications of cased hole logging. [2] h) List the methods to study changes in Petrophysical parameters over time, used for reservoir monitoring. [2] Q2) Describe borehole environment. What is invasion profile? Explain empirical relationship between different zones and fluids. Which logs are influenced most by the nature of invasion profile. [16] OR Explain important electrical logging methods with the help of neat sketches. Q3) Write notes on any two of the following: a) Logs used for evaluation of cementation, b) MWD, c) Radioactivity logs, d) Sonic log. [16] P.T.O. SECTION - II Q4) Outline the Quick Look Method for determination of oil saturation. [18] OR What are clays? Distinguish between clays and clay minerals? Give important properties of clay minerals. How do clay minerals occur in sedimentary rocks? In what way clay minerals influence rock properties? Which logs are affected by clays? How? Q5) Write short notes on any four of the following: a) Downhole production sampler, b) Perforation, c) Cross plots, d) Recognition of fractured reservoirs, e) Geosteering, f) [16] Caliper logs. Q6) Answer any two of the following: [16] a) Explain the importance and procedure of cuttings analysis . b) What is the origin of overpressure in the formation? Explain the methods to detect overpressure. c) With the help of neat sketches explain how log patterns could be used to detect different depositional environments and fluid contents in reservoirs. Y [3664] - 310 2

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