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2003 Course Petroleum Exploration

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Total No. of Questions : 6] P1376 [Total No. of Pages : 3 [3664]-309 B.E. (Petroleum Engineering) PETROLEUM EXPLORATION (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates : 1) Answers to the two sections should be written in separate books. 2) Neat diagrams should be drawn wherever necessary. 3) Figures to the right indicate full marks. SECTION - I Q1) Answer any two questions of the following: a) b) What is a gravimeter? What are the types of gravimeter? Explain the construction of Lactose Romberg Gravimeter. [8] Calculate the Bouger Anomaly for following data collected during the gravity survey along a line in an area (1 is a base station). [8] Given : Tidal Correction : 0.01 mgal, Terrain Correction : 0.031 mgal = 2.75 gm/cc constant in a region. The Latitude of a line is 23 39 40 Station Time in hrs g obs mgal Elevation in meter 1 9.01 98136891 0 2 3 98136903 98136925 150 175 4 5 1 c) d) 9.10 9.21 9.40 9.50 10.07 98136950 98136930 98136899 125 100 0 Explain the construction and working of flux gate magnetometer. [8] Draw and discuss the effects produced by following conditions in gravity and magnetic survey i) ii) A buried sphere of uniform radius r at a depth z with density higher than surrounding. A faulted horizontal sheet with thickness t , occurring at a depth Z1 and Z2, (where Z1 > Z2), with density higher than surrounding and angle of faulting = 45 and also = 90 . [8] P.T.O.

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