Acoustic Porosity

11 Questions | Total Attempts: 39

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Acoustic Porosity

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Questions and Answers
  • 1. 
    The BCDT compensates for the effects of tool tilt and washouts.
    • A. 

      True

    • B. 

      False

  • 2. 
    Which of the following is NOT considered a body wave?
    • A. 

      Compressional Wave

    • B. 

      Tidal Wave

    • C. 

      Shear Wave

    • D. 

      Stoneley Wave

  • 3. 
    What does Delta-T represent?
    • A. 

      The time required for sound to travel through a one foot interval of formation.

    • B. 

      The time required for sound to travel from the transmitter to a receiver

    • C. 

      The distance traveled by a direct wave from the transmitter through the formation and detected at the receiver.

  • 4. 
    Acoustic porosity services are NOT capable of recording acoustic waves in _________.
    • A. 

      Oil-based mud

    • B. 

      Saltwater-based mud

    • C. 

      Air-drilled holes

    • D. 

      Freshwater-based mud

  • 5. 
    Compressional Delta-T is proportional to the reciprocal of P wave velocity.
    • A. 

      True

    • B. 

      False

  • 6. 
    What effect do slots cut into the tool housing have on tool mode waves?
    • A. 

      Increased velocity

    • B. 

      Increased travel times

    • C. 

      Decreased travel times

    • D. 

      Decreased velocity

  • 7. 
    The distance between transmitter and receiver is known as:
    • A. 

      Span

    • B. 

      Spacing

    • C. 

      Offset

    • D. 

      Arrival

  • 8. 
    Depth-derived borehole compensation used by the Long Space Sonic compensates for both tool tilts and washouts.
    • A. 

      True

    • B. 

      False

  • 9. 
    Select all of the following that are considered body waves.
    • A. 

      Mud Waves

    • B. 

      Shear Waves

    • C. 

      Compressional Waves

    • D. 

      Leaky Mode

    • E. 

      Stoneley Waves

  • 10. 
    Compressional Wave velocity is a function of the elastic properties and bulk density of the medium through which it travels.
    • A. 

      True

    • B. 

      False

  • 11. 
    Compressional Delta T ________ as porosity increases.
    • A. 

      Increases

    • B. 

      Decreases