|Aquifer Storage Field
||A sub-surface facility for storing natural gas, consisting of water-bearing sands
topped by an impermeable cap rock.
|Depleted Reservoir Storage Field
||A sub-surface natural geological reservoir, usually a depleted gas or oil field,
used for storing natural gas.
||A gaseous mixture of hydrocarbon compounds, the primary one being methane.
|Salt Dome Storage Field (Salt Cavern)
||A storage facility that is a cavern hollowed out in either a salt "bed" or "dome" formation.
||The present developed maximum operating capacity.
|Working Gas Capacity
||The volume of total natural gas storage capacity that contains natural gas available for withdrawal.