A well flows naturally, yet the operator adds gas lift. The most likely reason is:
A) To increase reservoir pressure
B) To raise oil viscosity
C) To lighten the fluid column and increase drawdown and rate
D) To reduce GOR

Pr = 3000 psi, Pb = 2500 psi, J = 2 stb/d/psi, Pwf = 1500 psi. Total rate using the Vogel combined IPR is closest to:
A) 1000 stb/d
B) 1644 stb/d
C) 2644 stb/d
D) 3500 stb/d

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Which well is more sensitive to tubing size?
A) Dry gas well
B) High-GOR oil well, because tubing size affects both friction and hydrostatic gradient
C) Both equally
D) Neither

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Below bubble point, a well's PI falls though absolute permeability is unchanged. Why?
A) Rock compaction
B) Increased oil viscosity at surface
C) Gas saturation rises, reducing oil relative permeability
D) Tubing friction increases

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