a well from which natural gas is obtained.
a well for obtaining natural gas
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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At fracking the locals around the gas well have to suffer various pollutions with the current technology.
Each natural gas well produces millions of gallons of wastewater that can be contaminated with salt, chemicals and crude oil.
The only thing breaking through that layer is the gas well itself.