The process of injecting acid into a reservoir to increase permeability is called:
a) Acidizing
b) Stimulation
c) Fracturing
d) Perforating
Answer: a) Acidizing
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In wireline logging, SP log primarily measures:
a) Porosity
b) Permeability
c) Formation water salinity
d) Oil viscosity
Answer: c) Formation water salinity
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Which of the following is an artificial lift method?
a) Water flooding
b) Gas lift
c) Polymer injection
d) Steam injection
Answer: b) Gas lift
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The term “skin factor” in well testing indicates:
a) Wellbore storage
b) Formation damage or stimulation
c) Permeability
d) Porosity
Answer: b) Formation damage or stimulation
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Which logging method is best for determining lithology?
a) Gamma-ray log
b) Sonic log
c) Resistivity log
d) Neutron log
Answer: a) Gamma-ray log
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Enhanced oil recovery (EOR) methods include:
a) Thermal recovery
b) Gas injection
c) Chemical flooding
d) All of the above
Answer: d) All of the above
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Which of these is NOT a drilling fluid additive?
a) Bentonite
b) Barite
c) Diesel
d) Cement
Answer: d) Cement
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The term “spudding” refers to:
a) Starting drilling operations
b) Running casing
c) Cementing
d) Completing the well
Answer: a) Starting drilling operations
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Which law forms the basis for describing single-phase fluid flow through porous media?
A) Darcy’s Law
B) Fick’s Law
C) Henry’s Law
D) Pascal’s Law

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The primary purpose of drilling mud is:
A) Cooling and lubricating the bit
B) Carrying cuttings to the surface
C) Controlling formation pressure
D) All of the above

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Gas lift method of artificial lift works on the principle of:
A) Increasing bottom hole pressure
B) Reducing fluid density in tubing
C) Increasing tubing friction
D) Hydraulic pumping

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Which logging tool is primarily used to determine porosity in a formation?
A) Caliper log
B) Density log
C) Gamma ray log
D) Resistivity log

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In water flooding, the main recovery mechanism is:
A) Gravity drainage
B) Displacement of oil by injected water
C) Solution gas drive
D) Rock compaction drive

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Skin factor in well testing indicates:
A) Permeability of formation
B) Damage or stimulation near wellbore
C) Reservoir porosity
D) Flowing bottom hole pressure

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Net Present Value (NPV) of an oilfield project will increase if:
A) Oil price decreases
B) Operating costs increase
C) Discount rate increases
D) Production volume increases

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Blowout Preventers (BOPs) are installed:
A) On surface casing only
B) On production tubing only
C) On wellhead to control unexpected pressure surges
D) On mud pumps

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Which process is used in refineries to improve the octane number of gasoline?
A) Distillation
B) Cracking
C) Reforming
D) Polymerization

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Barite (BaSO₄) is added to drilling mud mainly for:
A) Increasing viscosity
B) Preventing corrosion
C) Increasing mud weight
D) Lubricating the bit

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