Which term refers to the gas that has separated from produced water in a production stream?

• A. Associated gas
• B. Blue gas
• C. Dry gas
• D. Wet gas

Answer: (B)

When oil is produced, gas is present with the oil in the reservoir. The gas that separates from the produced stream alongside the oil is called associated gas. It comes from oil-bearing reservoirs and is distinct from gas that comes from a dedicated gas reservoir (non-associated gas). After processing, the terms wet gas and dry gas describe the gas’s composition (whether it still contains condensable liquids or is mainly methane), not its association with oil. Blue gas isn’t a standard term used in this context.