Industries Natural Gas Storage
Gas in an underground storage facility is divided into two categories, working gas (top gas) and cushion gas (base gas).
Working gas (top gas) - the volume of gas in the reservoir above the designed level of cushion gas. If the Conditions allow it, a percentage or all of the working gas capacity could be injected and withdrawn more than once during any season.
Cushion gas (base gas) - the volume of gas, including native gas, needed as a permanent inventory in a storage reservoir to maintain adequate reservoir pressure and deliverability rates throughout the withdrawal season.
For more detailed information about natural gas storage, visit the following websites:
- » EIA: Basics of Underground Natural Gas Storage
- » NaturalGas.org: Storage of Natural Gas
- » The Energy Information Administration (EIA) - lists weekly reports on the state of natural gas storage.
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