JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year PETROLEUM EXPLORATION METHODS Previous Question Paper (November/December - 2017 - R15)
Part A is compulsory (25 Marks). Answer all questions. Part B consists of 5 Units. Answer any one full question from each unit (10 Marks each).
PART - A
What do you mean by Sedimentological and Biostratigraphic approaches?
Answer
Sedimentological approach involves the study of sedimentary rocks, their composition, texture, and depositional environments to identify potential source, reservoir, and seal rocks. The Biostratigraphic approach uses fossil assemblages within rock strata to determine the relative age of geological formations and correlate them across different geographic locations.
Distinguish geological and geochemical methods.
Answer
Geological methods rely on the direct observation and mapping of surface rock outcrops, structural features, and stratigraphic relationships to infer subsurface conditions. Geochemical methods involve the systematic sampling and chemical analysis of soils, gases, or fluids to detect trace concentrations of hydrocarbons or pathfinder elements that indicate the presence of buried mineral or petroleum deposits.
Write any two Magnetic survey-instruments.
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What is the main difference between diurnal correction and geomagnetic correction?
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Define Newton’s Gravitational Law? Write units of gravity.
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Distinguish free air and Bouguer anomalies.
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Explain the two layer case with horizontal interface.
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What are seismic refraction methods? Explain.
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Define seismogram.
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Explain the importance of seismic reflection survey over seismic refraction survey technique.
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PART - B
Discuss the current Petroleum refining scenario in India.
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Discuss briefly the geochemical exploration methods.
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What do you mean by Trapping mechanisms? Explain the sedimentological stratigraphic factors associated with hydrocarbon exploration techniques.
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Discuss the overview of petroleum exploration and potential significance of these methods.
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Write short notes on:
Diurnal correction and geomagnetic correction.
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Magnetic anomalies.
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What is the response of magnetic method for different type of bodies and geological structure? Discuss briefly.
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Discuss briefly about field method of magnetic surveys.
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What is Gravity anomalies? How it differs from free air and Bouguer anomalies.
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Explain briefly the application of seismic refraction method.
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Write short notes on:
Gravity survey
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Gravity response of simple shapes.
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Explain the following briefly:
Seismic refraction surveys
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Methodology of refraction profiling.
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What do you mean by Geometry of refracted path? Discuss briefly.
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What do you mean by reflection seismograph and seismogram (Seismic traces)? Explain briefly.
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Write short notes on 3D data acquisition and interpretation.
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How “Well seismic shooting” is used for velocity determination? Explain briefly.
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What is Vertical Seismic Profiling (VSP)? Explain Zero-offset VSPs briefly.
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