JNTU
JNTU B.Tech III WELL LOGGING AND FORMATION EVALUATION Previous Question Paper (May/June - 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. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
What is well logging?
Answer
Well logging is the process of recording physical, chemical, or electrical properties of the subsurface formations encountered in a borehole as a function of depth. It provides essential data for identifying lithology, estimating porosity, determining fluid saturation, and evaluating reservoir potential.
Write a short note about log quality control.
Answer
Log quality control (QC) is the systematic process of verifying the accuracy and reliability of logging data during and after acquisition. It involves checking tool calibration, monitoring signal-to-noise ratios, ensuring consistent depth tracking, and identifying environmental effects. Proper QC ensures that the data is representative of the formation and suitable for petrophysical interpretation.
What are the factors influence SP logs?
Answer
Sign in to view the complete answer paper.
Which tool would you prefer to use across a high resistive oil bearing zone?
Answer
Sign in to view the complete answer paper.
How to determine the primary porosity by sonic logging tool?
Answer
Sign in to view the complete answer paper.
Write a short note about photoelectric flux.
Answer
Sign in to view the complete answer paper.
What are the most common combinations of well logs to run after reaching total depth?
Answer
Sign in to view the complete answer paper.
Write a short note on Fluid density log.
Answer
Sign in to view the complete answer paper.
What is the working principle of Spinner flow meter?
Answer
Sign in to view the complete answer paper.
What is dip meter log?
Answer
Sign in to view the complete answer paper.
Part B
What are accepted best practices in SP interpretation? And how does the SP log work with other logs?
Answer
Sign in to view the complete answer paper.
What are the different physical properties of clays that are relevant to log interpretation?
Answer
Sign in to view the complete answer paper.
Explain the empirical relationship between water resistivity, porosity and water saturation.
Answer
Sign in to view the complete answer paper.
Explain the principle and applications of micro resistivity log.
Answer
Sign in to view the complete answer paper.
Why do we need different types of resistivity tools? Describe the principle and commonly used tools in electrical resistivity logging.
Answer
Sign in to view the complete answer paper.
Discuss the principle of neutral spectral gamma ray logging and its applications.
Answer
Sign in to view the complete answer paper.
Discuss the principle of Density logging and its limitations.
Answer
Sign in to view the complete answer paper.
What is the difference between natural and spectral Gamma Ray logs? Explain the qualitative and quantitative application of each of them.
Answer
Sign in to view the complete answer paper.
What is the working principle and applications of Cement bond log and Casing collar log? Describe the each of them.
Answer
Sign in to view the complete answer paper.
Explain the ‘quick-look’ log interpretation method details.
Answer
Sign in to view the complete answer paper.
Determination of Resistivity of water (Rw) by using porosity-resistivity plot (Hingle plot).
Answer
Sign in to view the complete answer paper.