Acoustic Porosity
11 Questions
| Total Attempts: 39
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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
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