|Base (cushion) gas
||The volume of gas needed as a permanent inventory to maintain adequate reservoir
pressures and deliverability rates throughout the withdrawal season. All native gas is
included in the base gas volume.
|Gas in storage
||The sum of base gas plus working gas.
||The volume of gas injected into storage reservoirs.
||A gaseous mixture of hydrocarbon compounds, the primary one being methane.
||The amount by which storage withdrawals exceed storage injections.
|Salt Cavern Storage Field
||A storage facility that is a cavern hollowed out in either a salt "bed" or "dome" formation.
||The volume of gas withdrawn from storage reservoirs.
|Working (top storage) gas
||The volume of total natural gas storage capacity that contains natural gas available for withdrawal.