Gas Processing Handbook Exclusive Jun 2026

: Initial separation at the wellhead.

| Component | Volume % (varies by field) | |-----------|----------------------------| | Methane (C1) | 70–95 | | Ethane (C2) | 1–10 | | Propane (C3) | 0.5–5 | | Butanes+ (C4+) | 0.2–2 | | Carbon dioxide (CO₂) | 0–20 | | Hydrogen sulfide (H₂S) | 0–5 | | Nitrogen (N₂) | 0–5 | | Helium (He) | 0–0.1 | | Water vapor | Saturated | gas processing handbook exclusive