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Ask your parents where natural gas comes from, and they’ll probably say the gas company. That’s because a simple phone call to your local natural gas utility is usually all it takes to set up service.
Want to know where natural gas really comes from? Well, you’ll have to use your imagination and get really small. Pretend you’re a tiny natural gas molecule, hanging out in a gas trap with other natural gas molecules several miles beneath the earth’s surface.
Start Underground
It’s dark in there. Luckily, you don’t need to breathe because there isn’t any air to speak of, just a lot of methane plus some carbon dioxide, butane, ethane, propane, pentane, nitrogen, hexane, heptanes, and water vapor. You and the other gas molecules have been in this one spot for a very long time—millions of years, in fact.
Whoosh!
You’re cozy and content in your little home... 
Then
one day, out of the blue, you hear a loud roar and whoosh!—you’re
sucked up through a well and
into a huge pipeline. You and your little gas buddies are pumped through
this pipeline to a processing
plant. There, you say
goodbye to the water vapor, carbon dioxide, and other molecules considered
impurities. These are removed in a treatment process called “sweetening” the
gas.
Next, you are pumped into a network of steel transmission pipes that range in size from 20 to 42 inches in diameter. If you could make a sound, you would probably be able to hear it echo inside these big pipes.
Under Pressure
About every 50 to 60 miles you pass through a compressor station. Compressor stations compress (squeeze) you to push you to the next station along the line.
The compressor station works kind of like a hand around a tube of toothpaste. Squeezing the bottom of the tube causes the toothpaste to flow out the top. And the harder it’s squeezed, the faster it flows. Likewise, the harder the compressor stations pressurize you, the faster you flow.
You and the other gas molecules are tightly packed together now, and you feel as if you are being pushed quickly through the pipes from behind. Compressing a gas reduces its volume, so many more of you now fit into a smaller space. Not much elbow room left, so it’s lucky you don’t have elbows!
A Fork in the Road
You continue traveling through the pipeline until you reach a fork—a
place where the pipe splits off in different directions. Some of your friends
are sent down one fork of the pipeline to distribution companies, where
they are put into storage
tanks for future use. The rest of you move on
to a natural gas utility—a company that delivers natural gas to homes
and businesses.
Once you reach the gas utility, your pressure is reduced and a chemical
called mercaptan is added to you. You had no odor before, but now you can
barely stand your own smell. Mercaptan contains sulfur and makes you smell
like rotten eggs. It’s added so people will be able to tell if natural
gas is leaking from their natural gas pipes or appliances.
Under the Street
From the gas utility, you travel through small pipes called distribution mains. These pipes are between 2 and 24 inches in diameter and run below the streets. You zip along under the street, hearing the rumble of traffic overhead.
All of a sudden, the pipeline you were in gets smaller, and smaller again.
Now you are in a service
line that leads from the distribution main to
a house. You are about to go through a gas
meter! You’re about to
be used in someone’s home! 
The gas meter measures the amount of gas
used in the home, just as an electric meter measures electricity usage.
The gas company uses this information to figure out how much to charge
on people’s gas bills.
Journey’s End
Before entering the meter, you go through a gas pressure regulator where
your pressurization is reduced. Then you whiz through the meter and into
gas lines—pipes that are an inch wide or less. You can relax a
little now, because you’re not under as much pressure.
But you
continue to bounce around with excitement, eager to find out which appliance you’ll serve. Will it be the gas range in the kitchen? The gas
clothes dryer? The water heater? The furnace? Whichever it is, you hope
you’ll be put to good use.
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