Borehole Geophysics & Petrophysics

25 Questions | Total Attempts: 1620

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Borehole Geophysics & Petrophysics

This Quiz is dedicated to Well Logging & petrophysics concepts. . . Carry On Guys. . . . Have Fun. . Best Wishes ,, Kapil Tyagi


Questions and Answers
  • 1. 
    Number of Sedimentary Basins of India are  :
    • A. 

      24

    • B. 

      25

    • C. 

      26

    • D. 

      27

  • 2. 
    What is Exploration ???
    • A. 

      Discovering new commercial units of Hydrocarbon

    • B. 

      Discovering Hydrocarbon

    • C. 

      Discovering possible Reservoir Facies

    • D. 

      None of the above

  • 3. 
    For accurate identification of a basin you need :
    • A. 

      Age

    • B. 

      Location

    • C. 

      Sediment Type

    • D. 

      Age & Location

  • 4. 
    Presence of source rock ensures Hydrocarbon in a Basin.
    • A. 

      True

    • B. 

      False

  • 5. 
    High Resistivity is always indicator of Hydrocarbons .
    • A. 

      True

    • B. 

      False

  • 6. 
    Source rocks of petroleum are :
    • A. 

      Highly Porous and Permeable Rocks

    • B. 

      Fine Grained Sediments

    • C. 

      Granitic rocks

    • D. 

      None of these

  • 7. 
    Gamma Ray detected in density log is :
    • A. 

      Natural Gamma present in the formation

    • B. 

      Gamma Ray from Epithermal Neutron source

    • C. 

      Gamma Ray scattered from the formation

    • D. 

      Gamma ray produced due to neutron absorption

  • 8. 
    If the saturation exponent in Archie's Equation is 2 (n=2) , Then By what factor the bulk resistivity of 50 % water saturated formation increases in comparision to fully water saturated formation  ???
    • A. 

      4

    • B. 

      8

    • C. 

      16

    • D. 

      32

  • 9. 
    A combination of Radioactive Logging to detect chlorine in a formation is ::
    • A. 

      Neutron-Thermal Neutron Log & Gamma Gamma Log

    • B. 

      Neutron-Epithermal Neutron Log and Neutron-Gamma Log

    • C. 

      Neutron Gamma Log and Gamma Gamma Log

    • D. 

      Neutron-Epithermal Neutron Log and Gamma Gamma Log

  • 10. 
    Spine and Ribs plots are used for :
    • A. 

      Mineral Identification

    • B. 

      Porosity Determination

    • C. 

      Mud Compensation

    • D. 

      None of above

  • 11. 
    Which logging tool has largest depth of investigation ??
    • A. 

      Induction tools

    • B. 

      Porosity tools

    • C. 

      MSFL Tools

    • D. 

      Laterolog

  • 12. 
    Which Resistivity logging tool is able to identify the thin beds sharply ??
    • A. 

      Laterolog

    • B. 

      Induction Log

    • C. 

      Micro Spherically Focused Log (MSFL)

    • D. 

      All of the above

  • 13. 
    In electrical logging the measured resistivity of flushed zone is 19.2 ohm-m , the resistivity of mud filtrate is 1.33 ohm-m and computed value of residual oil saturation in flushed zone is 20 % . What is the value of Formation Resistivity Factor ???
    • A. 

      9.24

    • B. 

      8.50

    • C. 

      9.11

    • D. 

      8.85

  • 14. 
    No current source is used for SP Log recording .
    • A. 

      True

    • B. 

      False

  • 15. 
    Induction Resistivity Tool is preferred over Latero-Type tools in non conductive muds .
    • A. 

      True

    • B. 

      False

  • 16. 
    Depth of Investigation of Focussed Current resistivity tools is less than unfocussed tools .
    • A. 

      True

    • B. 

      False

  • 17. 
    It is possible to record certain logs simultaneously .
    • A. 

      True

    • B. 

      False

  • 18. 
    Free fluid index (FFI) of a formation is estimated from ::
    • A. 

      Neutron Log

    • B. 

      Resistivity Log

    • C. 

      SP Log

    • D. 

      NMR Log

  • 19. 
    Litho-density Log works on the principle of :
    • A. 

      Compton Scattering

    • B. 

      Photoelectric absorption

    • C. 

      Pair production

    • D. 

      All of the above

  • 20. 
    In a shale formation , which clay mineral are most radioactive ?
    • A. 

      Illite

    • B. 

      Kaolinite

    • C. 

      Chlorite

    • D. 

      Montmorillonite

  • 21. 
    A log that helps in finding the fractured porosity is: :
    • A. 

      Neutron

    • B. 

      Density

    • C. 

      Sonic

    • D. 

      NMR

  • 22. 
    Positive SP is developed against reservoir section when salinity of formation water is more than the salinity of mud filtrate .
    • A. 

      True

    • B. 

      False

  • 23. 
    How depth of invasion of mud filtrate is related to porosity ??
    • A. 

      Directly proportional

    • B. 

      Inversely proportional

    • C. 

      Independent

    • D. 

      Exponentially related

  • 24. 
    Temperature range for oil window is :
    • A. 

      0 -100 degree celsius

    • B. 

      60-175 degree celsius

    • C. 

      100-325 degree celsius

    • D. 

      None of the above

  • 25. 
    Which of the following log is used for depth matching and well to well correlation while running with other logs ??
    • A. 

      Natural Gamma Log

    • B. 

      Gamma Gamma log

    • C. 

      Neutron log

    • D. 

      None of these

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