SLB Petrophysics FINAL EXAM QUESTIONS AND
CORRECT ANSWERS
Name 5 petrophysical data and sources - CORRECT ANSWERS Mudlog
Cores
Open hole logs
Cased hole logs
Borehole seismic
The first direct evaluation methods available during the drilling of an exploration well? -
CORRECT ANSWERS Mud logging
What information that is provided by mud logging? - CORRECT ANSWERS Lithology
Texture
Presence of HC
Conventional coring is obtained by which device? - CORRECT ANSWERS Drill string
Name 2 methods of coring? - CORRECT ANSWERS Drill string coring
Wireline coring
2 methods for coring using wireline? - CORRECT ANSWERS Percussion coring (most
common but samples are small and damaged -> can't be used for petrophysical analysis)
Wireline rotary coring (can be used for petrophysical analysia, works well in hard formationa but
is ineffective in unconsolidated formations and in wash-outs)
, 2 types of open hole logging? - CORRECT ANSWERS Wireline logging (after the well has
been drilled)
Logging while drilling (while the well is being drilled)
Which physics of measurement does the petrophysicist use to evaluate rock properties? -
CORRECT ANSWERS Resistivity
Nuclear
Acoustic
Nuclear magnetic resonance
Applications of cased hole logging? - CORRECT ANSWERS Cement evaluation
Peforating
Reservoir monitoring
Production logging
Corrosion evaluation
Which log is used for cement evaluation? - CORRECT ANSWERS Cement bond log
How does the waveform of CBL change when there is good cement and poor cement? -
CORRECT ANSWERS Good cement: decreases
Poor cement: increases
What is the most commonly applied petrophysical logging tools for reservoir monitoring? -
CORRECT ANSWERS Pulsed neutron tools
CORRECT ANSWERS
Name 5 petrophysical data and sources - CORRECT ANSWERS Mudlog
Cores
Open hole logs
Cased hole logs
Borehole seismic
The first direct evaluation methods available during the drilling of an exploration well? -
CORRECT ANSWERS Mud logging
What information that is provided by mud logging? - CORRECT ANSWERS Lithology
Texture
Presence of HC
Conventional coring is obtained by which device? - CORRECT ANSWERS Drill string
Name 2 methods of coring? - CORRECT ANSWERS Drill string coring
Wireline coring
2 methods for coring using wireline? - CORRECT ANSWERS Percussion coring (most
common but samples are small and damaged -> can't be used for petrophysical analysis)
Wireline rotary coring (can be used for petrophysical analysia, works well in hard formationa but
is ineffective in unconsolidated formations and in wash-outs)
, 2 types of open hole logging? - CORRECT ANSWERS Wireline logging (after the well has
been drilled)
Logging while drilling (while the well is being drilled)
Which physics of measurement does the petrophysicist use to evaluate rock properties? -
CORRECT ANSWERS Resistivity
Nuclear
Acoustic
Nuclear magnetic resonance
Applications of cased hole logging? - CORRECT ANSWERS Cement evaluation
Peforating
Reservoir monitoring
Production logging
Corrosion evaluation
Which log is used for cement evaluation? - CORRECT ANSWERS Cement bond log
How does the waveform of CBL change when there is good cement and poor cement? -
CORRECT ANSWERS Good cement: decreases
Poor cement: increases
What is the most commonly applied petrophysical logging tools for reservoir monitoring? -
CORRECT ANSWERS Pulsed neutron tools
