Page 62 - Oil and Gas Production Handbook An Introduction to Oil and Gas Production

5.1 Gas processing

Raw natural gas must be processed to meet the trading specifications of
pipeline and gas distribution companies. As part of the purification other
components such as NGL is produced, and pollutants extracted.
The diagram shows an overview of a typical gas plant. Marketable products
are listed in blue and the production process is shown in grey as it is not
considered part of the gas plant.
WELL

Production Process Condensate
- Separation
- Water treatment Water
Raw gas to pipeline Tail Gas Tail Gas
Cleanup Unit Disposal
Acid Gas Removal Sulfur Unit - Hydrotreatment -Stack
- Absorbtion - Claus Process - Solvents - Thermal
- Adsorbtion Oxidizer
- Cryogenic
- Membranes Elemental
Sulfur
Dehydration
- Absorbtion Water
- Pressure Swing

Mercury Removal Mercury
- Membranes waste
- Adsorbtion

Nitrogen Rejection Rich
- Absorbtion Nitrogen
- Adsorbtion gas
- Cryogenic

NGLs
NGL Recovery Fractionation Sweetening Ethane
- Absorbtion - Distillation - Catalytic Propane
- Cryogenic - Membrane Butane
other

Sales gas

Typical gas plant

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