WorksheetsFormation Evaluation Quiz
Total questions: 30
Worksheet time: 10mins
Which of the following is NOT a typical reason to perform formation evaluation?
To estimate recoverable oil
To determine mud weight
To locate fluid contacts
To identify rock types
Which data are essential for formation evaluation?
Rock and fluid properties only
Only flow potential
Only water saturation
Rock properties, fluid properties, and flow potential
Which method allows for evaluation before casing is set?
Cased-hole logging
Cuttings analysis
Open-hole well logging
Production logging
Which of the following can provide oil and gas shows during drilling?
DST
Cased-hole logging
Mud logs
Wireline logs
A limitation of cuttings data is that it:
Provides continuous core
Can show porosity distribution
May be re-drilled and disintegrated
Is always accurate
Which of the following is a limitation of drill cuttings?
Provides dip measurements
Good for structural analysis
Poor vertical resolution
Complete rock sample
Which of the following is NOT a type of core analysis?
Plug analysis
Sonic logging
Whole core analysis
Sidewall analysis
How long is a typical full-diameter conventional core?
3 ft
10 ft
30 ft
100 ft
Which core analysis method allows for both vertical and horizontal permeability measurement?
Wireline logging
Whole core analysis
Open-hole logging
Sidewall logging
Which coring method uses slim tools lowered by wireline?
Diamond coring
Percussion sidewall coring
Wireline coring
Mud coring
Which of the following is most likely to damage a soft formation during coring?
Wireline sampling
Rotary coring
Percussion sidewall coring
Sonic logging
Which type of coring uses directionally marked tools?
Special coring
Sidewall coring
Oriented coring
Diamond coring
Sleeved cores are used to:
Increase recovery speed
Decrease drilling time
Preserve core integrity and fluid properties
Increase porosity
Which type of core is best for determining sedimentary structures?
Sidewall core
Drill cuttings
Conventional core
Mud samples
Sidewall cores are generally how large?
5 inches long
2 inches long, 0.5 inch diameter
6 feet long
1 meter in length
Which parameter is NOT directly measured from core samples?
Porosity
Permeability
Water salinity
Lithology
Which test provides information about reservoir boundaries and pressure behavior?
Sonic log
Mud log
DST
Plug analysis
What does RFT stand for?
Reservoir Fluid Tester
Rotary Formation Tester
Repeat Formation Tester
Rock Fluid Tool
What allows MDT tools to measure vertical and horizontal permeability?
Multiple sidewall cores
Dual probe design
Wireline cable length
Drill stem pressure
Why are production tests important despite being costly?
They verify reserves and flow potential
They are easy to perform
They replace the need for coring
They are faster than logging
The primary limitation of wireline logging is that it provides:
Real-time drilling data
No lithologic information
Indirect formation information
Direct fluid content
Which of the following can immediately suggest presence of hydrocarbons?
DST
Mud logging gas shows
Wireline resistivity
Cuttings porosity
Which method uses a core bit with diamond coating?
Percussion sidewall coring
Conventional coring
Oriented coring
Wireline logging
Which coring method is commonly used in horizontal wells?
Wireline coring
Oriented coring
Sidewall coring
Diamond coring
Which tool allows real-time data acquisition during drilling?
LWD
DST
RFT
Mud log
In RFT/MDT tests, fluid contamination is avoided by:
Using drill bit filters
Isolating borehole fluid using sealing pad
Replacing all mud
Delaying the test
Which method is used to monitor gas and oil shows during drilling?
RFT
Mud logging
DST
LWD
Which of the following measures reservoir permeability from formation pressure data?
Sonic log
RFT/MDT
Core plug analysis
Cuttings log
Cubic packing of spheres leads to a porosity of approximately:
14%
27%
48%
33%
Which packing arrangement provides the lowest porosity?
Cubic
Rhombic
Mixed size
Random loose
