Gas Lift Troubleshooting

Diagnose gas lift problems from surface pressure readings and operating conditions.

Operating Data

Casing Pressure (psi)

Tubing Pressure (psi)

Design Injection Depth (ft)

Injection Gas Rate (Mscf/d)

Oil Rate (STB/d)

Gas-Liquid Ratio (scf/STB)

Observed Symptoms

Casing pressure higher than design Casing pressure lower than design Tubing pressure higher than expected Slugging / intermittent flow Production rate below expected Gas blowing through (high GLR, low oil)

Diagnostic Results

Pressure Analysis

Csg-Tbg Differential

Injection GLR

Gas Usage Efficiency

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