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2003 Course Petroleum Exploration

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Total No. of Questions : 6] P1442 [Total No. of Pages : 2 [3764]-372 B.E. (Petroleum Engineering) PETROLEUM EXPLORATION (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) 2) 3) 4) Answers to the two sections should be written in separate answer books. Neat diagrams should be drawn wherever necessary. Attempt any three questions from Section - I and Section - II. Figures to the right indicate full marks. SECTION - I Q1) a) Describe the principle, construction and working of Lacoste Romberg Gravimeter with the help of a neat figure. [8] b) How are magnetic anomaly maps prepared taking into consideration shapes and sizes of different subsurface bodies. [8] OR Write notes on any two of the following : [16] a) Earth s Magnetism. b) Proton precession magnetometer. c) Free Air and Bouger Correction. d) Drift correction in gravity survey. Q2) a) What is vertical electrical sounding ? Explain the Schlumberger method of vertical electrical sounding. What are the limitations? [12] b) What are the applications of electrical resistivity survey? [4] OR a) What is the principle of radioactive survey? Explain with suitable diagram the working principle of Geiger Muller Counter used in radioactivity survey. [8] b) How are different isotopes used in geochemical survey for petroleum?[8] P.T.O. Q3) a) What are the different modes of transport of microseepages of petroleum from reservoir to surface. [10] b) Why geochemical correlation of crude oil is necessary? What are the different geochemical correlation methods? [8] OR a) Describe in brief the field procedure adopted for petroleum geochemical survey. [12] b) What are the possible weathering processes of petroleum seepages? [6] SECTION - II Q4) a) Give important characteristics of seismic waveforms: velocity, amplitude, resolution and display. [8] b) What is CDP method of shooting? [8] OR a) What is a synthetic seismogram? How is it prepared? [8] b) Explain the navigation systems used for marine survey seismic survey.[8] Q5) Write short notes on any two of the following : [16] a) Direct detection methods of seismic survey. b) 4-D Seismic survey. c) Seismic stratigraphy. d) AVO technique. Q6) Discuss in details volumetric and material balance methods of reserves estimation giving advantages of each. [18] OR a) How do explorationists ascertain Geological Risk in petroleum exploration ventures? [9] b) List and explain unconventional hydrocarbon resources. How is their profitability assessed? [9] [3764]-372 2

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