Week 2 Halliburton Ttp

103 Questions | Total Attempts: 347

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Week 2 Halliburton Ttp

This quiz will deal with a few different components in the study of sound, with specific reference to wave velocity, acoustic porosity, transmitters, Delta-T, P-wave, voltage, vertical resolution and electrode devices. See how much you know about it!


Questions and Answers
  • 1. 
    What type of wave travels fastest through a formation?
    • A. 

      Shear

    • B. 

      Mud

    • C. 

      Surface

    • D. 

      Compressional

  • 2. 
    Acoustic porosity services are NOTcapable of recording acoustic waves in
    • A. 

      Air-drilled holes

    • B. 

      Oil-based mud

    • C. 

      Freshwater-based mud

    • D. 

      Saltwater-based mud

  • 3. 
    Which of the following is not considered a body wave?
    • A. 

      Shear wave

    • B. 

      Compressional wave

    • C. 

      Stoneley wave

  • 4. 
    What does Delta-T represent?
    • A. 

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

    • B. 

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

    • C. 

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

  • 5. 
    Which of the following is not a practical advantage of increasing offset between transmitter and receiver?
    • A. 

      Potential for deeper depth of investigation beyond the altered zone

    • B. 

      Enables accurate data acquisition in large diameter boreholes

    • C. 

      Enables faster logging speeds

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

      Increased velocity

    • B. 

      Decreased travel times

    • C. 

      Increased travel times

    • D. 

      Decreased velocity

  • 7. 
    Compressional detla-T (Δtc) _____________ as formation porosity increases.
    • A. 

      Remains constant

    • B. 

      Decreases

    • C. 

      Increases

  • 8. 
    Select all of the following that are considered body waves..
    • A. 

      Mud Waves

    • B. 

      Compressional Waves

    • C. 

      Stoneley Waves

    • D. 

      Leaky Mode

    • E. 

      Shear Waves

  • 9. 
    Compressional detla-T (Δtc) is proportional to the reciprocal of P-wave velocity.
    • A. 

      True

    • B. 

      False

  • 10. 
    Depth-derived borehole compensation used by the Long Spaced Sonic compensates for both tools tilt and washouts.
    • A. 

      True

    • B. 

      False

  • 11. 
    Compressional wave velocity is a function of the elastic properties and bulk density of the medium through which it travels.
    • A. 

      True

    • B. 

      False

  • 12. 
    The BCDT compensates for the effects of tool tilt and washouts.
    • A. 

      True

    • B. 

      False

  • 13. 
    The distance between transmitter and receiver is known as:
    • A. 

      Offset

    • B. 

      Spacing

    • C. 

      Arrival

  • 14. 
    Acoustic porosity provides a measure of the effective porosity of the formation.
    • A. 

      True

    • B. 

      False

  • 15. 
    A cycle skip is when P-wave first arrivals at two receivers are selected on different cycles of the waveform.
    • A. 

      True

    • B. 

      False

  • 16. 
    Which of the following is the DFL's depth of investigation?.
    • A. 

      24 inches

    • B. 

      17 inches

    • C. 

      12 inches

    • D. 

      10 inches

  • 17. 
    Select all the potential applications of the DFL measurement when combined with the HRID measurement.
    • A. 

      Measure formation porosity

    • B. 

      Qualitative estimation of permeability

    • C. 

      Measure resistivity of the drilling fluid

    • D. 

      Determination of flushed zone water saturation

    • E. 

      Estimation of diameter of invasion

  • 18. 
    The physical law which states that resistivity is directly proportional to voltage and inversely proportional to current is:
    • A. 

      Ampere’s law

    • B. 

      Ohm’s law

    • C. 

      Faraday’s law

    • D. 

      Mitchell’s law

  • 19. 
    On the DFL, bucking current (BC) is:
    • A. 

      Emitted from the Ao electrode and returns to the upper and lower A1 electrodes.

    • B. 

      Emitted from the Ao electrode and returns to the current return electrode.

    • C. 

      Emitted from the current return electrode and returns to the Ao electrode.

    • D. 

      Emitted from the upper and lower A1 electrodes and returns to the Ao electrode.

  • 20. 
    On the DFL, measure current (MC) is:
    • A. 

      Emitted from the A0 electrode and returns to the upper and lower A1 electrodes.

    • B. 

      Emitted from the current return electrode and returns to the A0 electrode.

    • C. 

      Emitted from the A0 electrode and returns to the current return electrode.

    • D. 

      Emitted from the upper and lower A1 electrodes and returns to the A0 electrode.

  • 21. 
    Measure voltage (VE) and bucking voltage (VB) are measured between:
    • A. 

      The Ao electrode and the current return electrode

    • B. 

      Monitor electrodes positioned along the HRID sonde assembly

    • C. 

      The Ao electrode and the upper and lower A1 electrodes

    • D. 

      Receiver coils within the HRID sonde assembly

  • 22. 
    What is the vertical resolution of the DFL?
    • A. 

      < 17 inches

    • B. 

      < 10 inches

    • C. 

      < 12 inches

    • D. 

      < 5 inches

  • 23. 
    An electrode device such as the DFL operates by:
    • A. 

      Injecting a voltage into the formation and measuring a current between two electrodes.

    • B. 

      Inducing a current into the formation and measuring a voltage between two receiver coils.

    • C. 

      Injecting a current into the formation and measuring a voltage drop between two electrodes.

    • D. 

      Inducing a voltage into the formation and measuring a current between two receiver coils.

  • 24. 
    A primary objective of logging the Digitally Focused Laterolog (DFL) is to determine:
    • A. 

      Formation water resistivity (Rw)

    • B. 

      True resistivity of the uninvaded formation (Rt)

    • C. 

      Mud filtrate resistivity (Rmf)

    • D. 

      Flushed zone resistivity (Rxo)

  • 25. 
    Which of the following is a true statement?
    • A. 

      The DSNT is used to help estimate the volume of shale in a formation when combined with density porosity or sonic porosity.

    • B. 

      The DSNT is used to determine a value for true resitivity of a formation.

    • C. 

      The DSNT is often used as a quantitative estimate of permeability.