Reservoir Characterization Quiz
1. Which techniques are involved in reservoir characterization according to the concept?
Core Analysis
Well Logging
Seismic Reflection
Well Testing
2. What is the main advantage of direct measurements (Core Analysis)?
They provide 'ground truth' measurements from cores
They cover the entire reservoir
They provide detailed measurement of rock properties
They are cheap and non-destructive
3. Which of the following are components of Routine Core Analysis (RCAL)?
Porosity measurement via Boyle's law using helium
Permeability measurement using a gas permeameter
Capillary pressure measurement
Fluid saturation measurement using methods like Dean-Stark extraction
4. Which parameters are typically measured in Special Core Analysis (SCAL)?
Cementation exponent (m)
Sonic travel time measurement
Capillary pressure measurement
Wettability determination (e.g., using the Amott test)
5. Which logs are used to determine porosity in wells?
Density Log
Neutron Log
Resistivity Log
Sonic Log
6. Which logs are typically part of well logging measurements for porosity and lithology evaluation?
Gamma Ray Log
Density Log
Neutron Log
Microseismic Log
7. What property does the Resistivity Log help determine?
Fluid saturation (via Archie's law)
Porosity measurement
Lithology determination
Water saturation estimation
8. Which of the following correctly describes Well Testing?
Measures pressure response during production changes
Provides average permeability over a large drainage area
Uses core samples for detailed lab analysis
Estimates well skin effects
9. What is the main disadvantage of direct core analysis?
Limited spatial coverage
High cost
Provides data over large regions
Potential for drilling damage affecting measurements
10. What is the role of integrating different reservoir characterization techniques?
Calibrates well log interpretation using core data
Validates reservoir models with dynamic testing data
Eliminates the need for any measurements
Combines multiple scales of measurement
11. Which measurements are typically performed in SCAL for understanding rock-fluid interactions?
Relative permeability measurement
Electrical properties measurement (cementation exponent, etc.)
Sonic travel time measurement
Capillary pressure measurement
12. Which of the following statements about Well Logging is true?
Provides continuous data along the well
Offers high-resolution description of rock properties
Replaces the need for core analysis completely
Requires calibration with core data
Is more expensive than core analysis
13. Which of the following are disadvantages associated with well logging?
Limited analysis volume around the borehole
Indirect measurements with many assumptions
Intrusive method that damages the formation
Can be less accurate without proper calibration
14. What does the term "skin" refer to in well testing?
Indicates damage or improvement around the borehole
Average permeability measurement in the drainage area
A negative skin value indicates well stimulation
Is derived from pressure buildup analysis
15. How do well testing results contribute to reservoir modeling?
Provide dynamic validation of reservoir models
Are used for history matching
Offer high-resolution data similar to well logging
Provide estimates of average permeability
Provide detailed lab-based core measurements
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