JNTU
JNTU B.Tech II Year PETROLEUM EXPLORATION METHODS Previous Question Paper (April - 2018 - 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. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
Define geophone.
Answer
A geophone is a transducer used in seismic exploration to convert ground motion (seismic vibrations) into electrical voltage signals for recording and analysis.
Write the geophysical methods.
Answer
The primary geophysical methods include:
- Seismic method
- Gravity method
- Magnetic method
- Electrical and Electromagnetic methods
- Radiometric method
- Well logging
What is a Geoid?
Answer
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What are magnetic storms?
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Deduce term Elevation.
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Define latitude.
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Write the use of seismograms.
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Why P and S waves are used?
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Deduce ray path.
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Define CDP.
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PART - B
Write the global petroleum exploration scenario with Indian context.
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What are the geological and geochemical methods are used in hydrocarbon exploration?
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What are the different geochemical parameters used to study the crude oil?
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How isotope surveys are useful in geochemical exploration of petroleum?
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Describe the working principle of flux gate magnetometer.
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Write the advantages and disadvantages of flux gate magnetometer.
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Describe the most important source of magnetism in terrestrial rocks, and why?
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Write the application of magnetic surveys both overland and from Air.
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What are the different types of corrections applied in Gravity survey?
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Why the corrections are needed to be applied? Explain any one of the corrections which is done for elevation?
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What is the difference between the gravitational acceleration (g) and the gravitational potential (U)?
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Describe the working principle of Lacoste Romberg gravimeter.
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Describe the geometry of seismic wave path on a horizontal reflector.
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What is the most critical parameters determining the horizontal resolution in a seismic reflection profile?
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Seismic waves can be characterized into two groups. Mention these and why this division is made.
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Describe the principal differences between a single channel seismic reflection systems from a multi-channel.
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Describe the advantages of 3D seismic over 2D seismic.
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Explain the reflection seismograph and seismogram.
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Explain the most suitable seismic refraction survey technique for hydrocarbon.
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Write the field procedure & principle for 3D seismic surveys.
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