The rate of penetration (ROP) decreases drastically when:

A. Mud weight is reduced
B. Differential pressure increases
C. Rotary RPM increases
D. Bit teeth are sharp


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Gas coning is more common in wells:

A. With low permeability
B. With high vertical permeability
C. Operating at low drawdown
D. With high water saturation

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ESPs are avoided in:

A. High GOR wells
B. High salinity wells
C. Low temperature wells
D. Shallow wells

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The most accurate formation permeability is measured by:

A. Log-derived permeability
B. Core analysis
C. MWD tools
D. Drill stem test

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The main reason for stuck pipe due to differential sticking is:

A. High annular velocity
B. High mud filtrate loss
C. Fast ROP
D. Smaller drill collars

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Waterflood breakthrough occurs when:

A. Mobility ratio is <1
B. Reservoir pressure becomes zero
C. Water front reaches the producer
D. Injection rate is too low


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In gas lift, lowering the injection depth generally:

A. Reduces lift efficiency
B. Increases lift efficiency
C. Stops gas injection
D. Increases backpressure

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NMR logs are primarily used to estimate:

A. Formation temperature
B. Free vs. bound fluid volumes
C. Sandstone lithology
D. Cement thickness

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Multilateral wells are drilled mainly to:

A. Increase casing strength
B. Access multiple reservoir layers
C. Avoid sidetracks
D. Reduce mud losses

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A mud with high gel strength may cause:

A. Better hole cleaning
B. Lost circulation
C. Surge and swab issues
D. Higher ROP


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A key controlling factor in miscible gas injection EOR is:

A. API gravity
B. Minimum miscibility pressure
C. Water saturation
D. Capillary pressure only


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The best indicator of well deliverability during testing is:

A. Static temperature
B. Flow-after-flow test results
C. Casing shoe integrity
D. Coring data


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The primary function of a packer in completion is:

A. Cement production
B. Provide zonal isolation
C. Increase porosity
D. Reduce GOR


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The drill string component that provides weight on bit is:

A. HWDP
B. Drill collars
C. Stabilizers
D. Kelly


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Gas hydrate formation in flowlines is promoted by:

A. High temperature
B. Low pressure + low temperature
C. High salinity
D. Presence of condensate


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