Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech II PETROLEUM EXPLORATION METHODS Previous Question Paper (May - 2019 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Write the names of petroleum exploration companies in India.
Answer
The primary petroleum exploration companies in India are Oil and Natural Gas Corporation (ONGC) and Oil India Limited (OIL).
Deduce term Gravity anomaly.
Answer
Gravity anomaly is the difference between the observed value of gravity at a specific location and the theoretical value of gravity calculated for that location based on a reference ellipsoid (like the International Gravity Formula). It is expressed as:
These anomalies indicate lateral variations in subsurface density, which are critical for identifying geological structures like salt domes or basement highs.
Enumerate the term Polar flattening.
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Define S-wave and L-wave.
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Write the gravity measurement equipment.
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Enumerate magnetic anomaly.
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What is seismic tomography?
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Write surface indication methods.
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Write the use of seismograph.
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What is seismogram?
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Part B
What strategies are to be adopted for exploration in stratigraphic traps?
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Illustrate geological methods used in petroleum exploration.
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What parameters are required for identification of hydrocarbon reserves?
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Describe the surface geophysical methods used in petroleum exploration.
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Discuss the operational principles of proton precession magnetometer.
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Describe the basic principle of flux gate magnetometer.
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Explain the importance of Magnetic survey in petroleum exploration. Also suggest the significance Curie temperature on the magnetization of basement rocks.
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What is a gravity anomaly? Describe positive and negative gravity anomaly.
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Define free air anomaly and Bouguer anomaly.
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What is the difference between an absolute gravity measurement and a relative?
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Gravimeters can be divided into three main groups. What are these three groups?
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Explain the basic principles behind the seismic refraction method.
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What is a so called bright spot in the seismic reflection profile?
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What are the recording instruments used in seismic survey? Explain one of them.
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Why corrections are needed to applied in refraction data interpretation of refraction data?
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Differentiate between 3D Pre-stack Depth Migration techniques with 2D Post-stack Time Migration technique.
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Write the field procedure and principle for 4D seismic surveys.
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Elaborate Common depth point (CDP) profiling and stacking.
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Write the importance of seismic reflection survey over seismic refraction survey technique.
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