Rock Physics Trivia: MCQ Quiz!
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- 1.Calculate the Acoustic Impedance of sand interval with velocity 2500 m/s and density 2.0 g/cc.
- A.
2500 m/s gr/cc
- B.
5000 m/s kg/m3
- C.
5 x 10^6 m/s kg/m3
- D.
2500 m/s kg/m3
- 2.What is the preference wavelet phase for Seismic Interpretation?
- A.
Maximum Phase
- B.
American convension
- C.
Zero Phase
- D.
Minimum Phase
- 3.Rock Physics is a branch of science for:
- A.
Understanding the seismic survey
- B.
Understanding the relationship between geophysical measurement and rock properties
- C.
Understanding the relationship between geophysical measurement and the location
- D.
Maximizing the risk in hydrocarbon exploration
- 4.What is the main difference between Petrophysics and Rock Physics?
- A.
Petrophysics more emphasis on stress, faulting, fracture processes
- B.
Petrophysics more emphasis on interpreting seismic, sonic and ultrasonic data
- C.
Petrophysics more emphasis on well logs, and often ignoring sonic logs and seismic
- D.
Petrophysics more emphasis on seismic survey
- 5.Petrophysical / Geological Model can be used to differentiate.
- A.
DHI
- B.
AVO Classes
- C.
Depth Trends
- D.
All are correct
- 6.Which of the following giving negative amplitude response (SEG polarity, Period: Tertiary)?
- A.
Shale overlying Reservoir Gas Sand
- B.
Shale overlying soft shale
- C.
Shale overlying coal
- D.
All are correct
- 7.The velocity responses to rocks based on, EXCEPT:
- A.
Porosity and pore geometry
- B.
Fluid type and saturation
- C.
Type of acquisition
- D.
Mineral composition and distribution
- 8.In terms of effective porosity, choose the correct explanation about cementation:
- A.
Loose become stable
- B.
Compaction
- C.
Overburden
- D.
Deposition of dissolved material
- 9.Reservoir porosity can be classified to several classes, choose the porosity value for very good reservoir.
- A.
0-5 %
- B.
Below 15%
- C.
Above 20%
- D.
Between 5 to 10%
- 10.Choose the correct answer for the production from unconventional reservoir.
- A.
The hydrocarbon produced from low porosity formation through secondary porosity
- B.
The hydrocarbon produced from low porosity formation through primary porosity
- C.
Brittleness index is not important
- D.
None of the above
- 11.Choose the correct answer for density definition.
- A.
Ratio between shear and bulk modulus
- B.
Ratio between bulk modulus and poisson ratio
- C.
Ratio between porosity and volume
- D.
Ratio between mass and volume
- 12.Choose the correct statement about density.
- A.
Density of quartz mineral (zero porosity ) is 2.65 gr/cc
- B.
Density of calcite (zero porosity) is 2.71 gr/cc
- C.
Density is the ratio between mass and volume
- D.
All of the above
- 13.Choose the correct statement on Bulk Modulus.
- A.
Bulk modulus of water is zero
- B.
Bulk Modulus of gas is higher than oil
- C.
Bulk Modulus of gas is higher than water
- D.
Bulk Modulus of water is higher than gas
- 14.Poisson Ratio is
- A.
The ratio of extensional stress to extensional strain in a uniaxial stress state
- B.
The ratio of the lateral strain to axial strain in a uniaxial stress state
- C.
The ratio of the pressure applied to the amount of volume change in the cube
- D.
The ratio of shear wave velocity
- 15.Choose the correct statement about Vp/Vs.
- A.
Can be used to separate different rock type and fluids
- B.
The response can differentiate between coal and gas sand
- C.
The response can be created from slowness logs: shear and primary
- D.
All of the above
- 16.Young Modulus is
- A.
The ratio of extensional stress to extensional strain in a uniaxial stress state
- B.
The ratio of the lateral strain to axial strain in a uniaxial stress state
- C.
The ratio of the pressure applied to the amount of volume change in the cube
- D.
The ratio of shear wave velocity
- 17.The Quartz minerals have:
- A.
High Poisson’s Ratio
- B.
Low Poisson’s Ratio
- C.
Higher Poisson’s Ratio than clay minerals
- D.
High Poisson’s Ratio compare to Calcite
- 18.In shallow high porosity sand region:
- A.
The AI of gas sand lower than shale formation
- B.
The AI of gas sand lower than brine sand
- C.
The Vp/Vs of gas sand lower than brine sand
- D.
All of the above
- 19.In low porosity sand region:
- A.
The AI of brine sand lower than shale formation
- B.
The AI of gas sand lower than brine sand
- C.
The Vp/Vs of gas sand higher than brine sand
- D.
All of the above
- 20.Empirical models used in Rock Physics, EXCEPT:
- A.
Castagna’s equation
- B.
Wyllie’s equation
- C.
Han’s equation
- D.
Voigt and Reuss
- 21.Castagna’s empirical relations:
- A.
Predict the shear velocity from compressional velocity
- B.
Predict porosity from compressional velocity
- C.
Predict clay content from compressional velocity
- D.
Predict Vp from compressional velocity
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