How natural gas is produced
Natural gas is about 95% methane, and it has to be stripped of water and other gases before anyone can burn it.
- stations
- 4
- things downstream
- 528
The short version
Natural gas forms when buried marine microorganisms are cooked for millions of years without oxygen. Wells tap the gas in rock, and it flows up the pipe under its own pressure. Plants then strip out water, hydrogen sulfide, carbon dioxide and heavier hydrocarbons, leaving methane for pipelines or for liquefying into LNG.
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Drill into the gas pocket
A well is bored into rock that traps gas, or into an oil field where gas is dissolved in the oil. Gas from oil wells is called associated gas.
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Let pressure carry it up
Reservoir pressure pushes the gas to the surface. In some formations, pressurized liquid is pumped in to open up the rock, so that the gas flows more easily.
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Strip out the impurities
Raw gas almost always has to be processed before it is burned. Water, carbon dioxide, hydrogen sulfide and sometimes helium and nitrogen are removed, and heavier hydrocarbons such as ethane, propane and butane are separated and sold separately.
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Send it down the pipe
Cleaned gas goes into pipelines. For shipping across oceans, it can be cooled into liquefied natural gas, which takes far less space.
Worth repeating
- The hydrogen sulfide removed from natural gas may be converted into pure sulfur.
- The world's largest gas field is South Pars/North Dome, offshore and shared between Iran and Qatar.
Where it goes next
Natural gas feeds 15 lines directly and reaches 528 things in total.
Further down the line
Keep walking
Sources
Cite this page: "How natural gas is produced." Assembly Line, 2026-11-03. https://assemblyline.org/make/natural-gas