The technical content includes the implementation of a forced cushion gas
replacement (sale and purchase) related to the operation of the zsana gas storage facility.
Russia's Gazprom have also been involved in the project, supplying cushion gas
that is needed to pressurise the reservoir.
In exchange for storage capacity, Gazprom supplied the 'cushion gas
' following a tender organised in cooperation with the Netherlands' Authority for Consumers and Markets.
Escal UGS had started injecting so-called cushion gas
into the reservoir when the earthquakes prompted the government to temporarily halt operations, on September 26.
National Grid data showed Rough had just 10 million cubic metres (mcm) of normal supply, yet has since 'nominated' or contracted to pump 21 mcm into Britain's gas network, which traders said indicated it was eating into its cushion gas
. Britain uses around 300 mcm of gas per day at this time of year, taking supply from North Sea pipelines, interconnectors from Belgium and the Netherlands, storage and imported liquefied natural gas (LNG).
Russia's Gazprom has agreed to provide 4 billion cubic metres of "cushion gas
", which remains permanently in storage to maintain pressure, in return for 1.9 billion cubic metres of gas in storage.
Aquifers also have another expensive drawback: 50-75% of the gas injected in them will become cushion gas
that might never be retrieved.
However, work to inject cushion gas
- required to maintain pressure levels in the facility - will continue.
Summary: The Bergermeer Gas Storage project consortium, consisting of EBN, Dyas B.V., Petro-Canada and operator TAQA Energy B.V., a subsidiary of The Abu Dhabi National Energy Company PJSC (TAQA), today signed an agreement with Gazprom export for provision of gas storage services in exchange for the delivery of cushion gas
for the Bergermeer Gas Storage project.
Gazprom will provide cushion gas
for the project, which is necessary to ensure the reservoir has optimal pressure to start storage activities, in exchange for working capacity and a participating interest in the operator of the facility.
The collaboration is aimed at Gazprom Export providing cushion gas
to the Bergermeer gas storage project, in which Taqa is a partner, in exchange for working capacity and a participating interest in the facility.
At all times during the operation of the reservoir, a constant volume of gas called "cushion gas
" had to be injected into and remain in the reservoirs in order to provide the necessary pressure to withdraw "working gas" for sale to customers.