Shale
Natural gas stored in extremely small pore spaces or bonded to organic material within rock composed mostly of consolidated clay, carbonate and siltstone.
Tight
Natural gas stored in small pore spaces in very low permeability underground formations, such as sandstone, siltstone or limestone.
Deep
Natural gas that's located deep within geological formations.
Coalbed methane
A sweet methane gas generated and stored in naturally occurring coal seams.
Natural gas liquids (NGL)
A combination of natural gas fluids associated with dry gas production, including ethane, propane, butanes, and condensate, which are light hydrocarbons that condense out of the fluid flow at the surface when the pressure and temperature fall from those in the reservoir.
Sweet gas
Raw natural gas with a relatively low concentration of sulfur compounds, such as hydrogen sulfide.
Sour gas
Raw natural gas with a relatively high concentration of sulfur compounds, such as hydrogen sulfide. All natural gas containing more than one percent hydrogen sulfide is considered sour.
Shale
Natural gas stored in extremely small pore spaces or bonded to organic material within rock composed mostly of consolidated clay, carbonate and siltstone.
Tight
Natural gas stored in small pore spaces in very low permeability underground formations, such as sandstone, siltstone or limestone.
Deep
Natural gas that's located deep within geological formations.
Coalbed methane
A sweet methane gas generated and stored in naturally occurring coal seams.
Natural gas liquids (NGL)
A combination of natural gas fluids associated with dry gas production, including ethane, propane, butanes, and condensate, which are light hydrocarbons that condense out of the fluid flow at the surface when the pressure and temperature fall from those in the reservoir.
Sweet gas
Raw natural gas with a relatively low concentration of sulfur compounds, such as hydrogen sulfide.
Sour gas
Raw natural gas with a relatively high concentration of sulfur compounds, such as hydrogen sulfide. All natural gas containing more than one percent hydrogen sulfide is considered sour.
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