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!
- 1.
What type of wave travels fastest through a formation?
- A.
Shear
- B.
Mud
- C.
Surface
- D.
Compressional
Correct Answer
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
Correct Answer
A. Air-drilled holes -
- 3.
Which of the following is not considered a body wave?
- A.
Shear wave
- B.
Compressional wave
- C.
Stoneley wave
Correct Answer
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.
Correct Answer
B. The time required for sound to travel through a one foot interval of formation. -
- 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
Correct Answer
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
Correct Answer
C. Increased travel times -
- 7.
Compressional detla-T (Δtc) _____________ as formation porosity increases.
- A.
Remains constant
- B.
Decreases
- C.
Increases
Correct Answer
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
Correct Answer(s)
B. Compressional Waves
E. Shear Waves -
- 9.
Compressional detla-T (Δtc) is proportional to the reciprocal of P-wave velocity.
- A.
True
- B.
False
Correct Answer
A. True -
- 10.
Depth-derived borehole compensation used by the Long Spaced Sonic compensates for both tools tilt and washouts.
- A.
True
- B.
False
Correct Answer
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
Correct Answer
A. True -
- 12.
The BCDT compensates for the effects of tool tilt and washouts.
- A.
True
- B.
False
Correct Answer
A. True -
- 13.
The distance between transmitter and receiver is known as:
- A.
Offset
- B.
Spacing
- C.
Arrival
Correct Answer
A. Offset -
- 14.
Acoustic porosity provides a measure of the effective porosity of the formation.
- A.
True
- B.
False
Correct Answer
A. True -
- 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
Correct Answer
A. True -
- 16.
Which of the following is the DFL's depth of investigation?.
- A.
24 inches
- B.
17 inches
- C.
12 inches
- D.
10 inches
Correct Answer
B. 17 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
Correct Answer(s)
B. Qualitative estimation of permeability
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
Correct Answer
B. Ohm’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.
Correct Answer
A. Emitted from the Ao electrode and returns to the upper and lower A1 electrodes. -
- 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.
Correct Answer
C. Emitted from the A0 electrode and returns to the current return 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
Correct Answer
B. Monitor electrodes positioned along 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
Correct Answer
A. < 17 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.
Correct Answer
C. Injecting a current into the formation and measuring a voltage drop between two electrodes. -
- 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)
Correct Answer
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.
Correct Answer
A. The DSNT is used to help estimate the volume of shale in a formation when combined with density porosity or sonic porosity. -
- 26.
The DFL simultaneously emits survey current and bucking current. Voltage is measured between sets of monitor electrodes positioned along the HRID sonde assembly. With these measures of current and voltage, software determines resistivity using Ohm’s law.
- A.
True
- B.
False
Correct Answer
B. False -
- 27.
Which of the following statements is true?
- A.
Hydrogen concentration does not influence count rate.
- B.
Low concentration of hydrogen results in lower count rates.
- C.
High concentration of hydrogen results in lower count rates.
Correct Answer
C. High concentration of hydrogen results in lower count rates. -
- 28.
Stand-off is defined as:
- A.
Any physical separation between a detector and formation
- B.
The centralization of the detector in the borehole
- C.
The distance between the tool and the borehole wall
Correct Answer
A. Any physical separation between a detector and formation -
- 29.
Neutrons lose more energy in which type of collision?
- A.
Glancing
- B.
Direct
- C.
Static
Correct Answer
B. Direct -
- 30.
What effect does substituting chlorine and sodium for hydrogen have on the thermal neutron count rate?
- A.
Decreases the count rate
- B.
Increases the count rate
- C.
Does not change the count rate
Correct Answer
B. Increases the count rate -
- 31.
Which of the following is the most efficient element at slowing neutrons?
- A.
Oxygen
- B.
Hydrogen
- C.
Helium
Correct Answer
B. Hydrogen -
- 32.
Hydrogen causes an energy loss of about __________ in each direct collision with a neutron.
- A.
10%
- B.
50%
- C.
35%
- D.
40%
Correct Answer
B. 50% -
- 33.
Select all of the potential applications of logging the DSNT tool.
- A.
Measure formation porosity
- B.
Measure formation permeability
- C.
Identification of gas bearing formations
- D.
Determine formation lithology
- E.
Determine formation resitivity
Correct Answer(s)
A. Measure formation porosity
C. Identification of gas bearing formations
D. Determine formation lithology -
- 34.
Which of the following statements about the DSNT is true?
- A.
The larger the hole size, the higher the count rate detected
- B.
The larger the hole size, the lower the count rate detected
- C.
Large hole size has no effect on the count rate detected
Correct Answer
B. The larger the hole size, the lower the count rate detected -
- 35.
Which of the following zero porosity formations has the highest SS/LS ratio?
- A.
Sandstone
- B.
Dolomite
- C.
Limestone
Correct Answer
B. Dolomite -
- 36.
Which level can the DSNT detect neutrons?
- A.
10 eV– 0.1 eV
- B.
1 MeV – 10 eV
- C.
- D.
10 MeV – 1 MeV
Correct Answer
C. -
- 37.
Count rate for the DSNT thermal neutron detector is defined as:
- A.
Number of thermal neutron multiplied by 100
- B.
Number of epithermal neutrons multiplied by 100
- C.
Number of thermal neutrons detected in one second
- D.
Number of epithermal neutrons detected in one second
Correct Answer
C. Number of thermal neutrons detected in one second -
- 38.
Which statement about the DSNT is true?
- A.
The SS/LS ratio is inversely proportional to formation pososity.
- B.
Different formation lithologies do not affect the formation porosity.
- C.
Formation lithology must be known to determine accurate formation porosity.
Correct Answer
C. Formation lithology must be known to determine accurate formation porosity. -
- 39.
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
Correct Answer
B. Increased travel times -
- 40.
Select the true statements regarding calibrating neutron tools at Halliburton.
- A.
All tools are calibrated at the API test pit in Houston.
- B.
A snow block is used to verify neutron tools at the well site..
- C.
A horizontal water tank is used to calibrate neutron tools at the well site.
- D.
The standard tool is calibrated at the API test pit in Houston.
Correct Answer(s)
B. A snow block is used to verify neutron tools at the well site..
D. The standard tool is calibrated at the API test pit in Houston. -
- 41.
Compressional wave velocity is a function of the elastic properties and bulk density of the medium through which it travels.
- A.
True
- B.
False
Correct Answer
A. True -
- 42.
_______________ waves are surface waves created by the flexing of the interface between the borehole fluid and formation fluid.
- A.
Shear
- B.
Leaky mode
- C.
Compound
- D.
Stoneley
Correct Answer
D. Stoneley -
- 43.
Which wave is the first to be detected at the receiver?
- A.
Leaky mode
- B.
Stoneley
- C.
Compressional
- D.
Shear
Correct Answer
C. Compressional -
- 44.
Which type of wave is the first to arrive at the receiver?
- A.
Shear
- B.
Mud
- C.
Stoneley
- D.
Compressional
Correct Answer
D. Compressional -
- 45.
How many waveforms are recorded for each FWS transmitter pulse?
- A.
8
- B.
16
- C.
4
- D.
2
Correct Answer
C. 4 -
- 46.
Which of the following is an example of a direct wave?
- A.
Mud wave
- B.
Stoneley wave
- C.
Shear wave
- D.
Compressional wave
Correct Answer
A. Mud wave -
- 47.
Leaky mode and normal mode waves are used to determine formation properties.
- A.
True
- B.
False
Correct Answer
B. False -
- 48.
In formations where shear velocity is slower than the velocity of the fluid pressure wave through the borehole, the FWS monopole transmitter will generate critically refracted shear waves.
- A.
True
- B.
False
Correct Answer
A. True -
- 49.
Stoneley wave velocities are not important for the purpose of formation evaluation.
- A.
True
- B.
False
Correct Answer
A. True -
- 50.
The minimum travel time from the transmitter to a receiver represents a:
- A.
Reflected wave
- B.
Totall refracted wave
- C.
Critically refracted wave
Correct Answer
C. Critically refracted wave -
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 15, 2022Quiz Edited by
ProProfs Editorial Team -
Jul 23, 2011Quiz Created by
Supercopjason
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