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Bonn, Germany

Schweinsberg H.J.,IVG Caverns GmbH
International Gas Research Conference Proceedings | Year: 2014

With the realization of the "energy turnaround" policy in 2011, the German energy industry, scientists, and the society in Germany is facing new challenges. The concept "power to gas" enables the combination of the electrical power grid with the gas infrastructure and opens the option of storing renewable energies in the large quantities in underground storages. A discussion covers the primary energy supply of Germany; stockpiling of energy fuel;, types of underground storages; function of cavern storages; the Etzel cavern storage facility, which demonstrates how the energy hub in the northwest of Germany will play an important role in current and future energy supply; development of the storage capacity in Germany; and function of underground storages with regard to renewable power production. This is an abstract of a paper presented at the International Gas Union Research Conference (Copenhagen, Denmark 9/17-19/2014). Source


Bernhardt H.,IVG Caverns GmbH | Boor S.,IVG Caverns GmbH | Reekers C.,IVG Caverns GmbH
DGMK/OGEW Spring Meeting (Celle, Germany, 4/11-12/2011) Proceedings [DGMK Meeting Report No.2011-1] | Year: 2011

The further development of the Etzel cavern field involves converting crude oil caverns to natural gas storage caverns. The large heights of the oil caverns meant that the brine-filled caverns could not be completely filled with natural gas in the conventional way i.e., injecting natural gas to displace the brine. The challenge of the complete displacement of brine in such caverns can be solved by using the gas lift method. This involves the injection of nitrogen into the brine stream. The first part of the paper gives a brief cost-benefit description as well as insight into the practical experience with the gas lift method, and describes the main factors influencing the brine displacement rate and nitrogen consumption. This involved conducting practical and theoretical analysis to help determine aspects such as the optimal coiled tubing installation depth and the optimal nitrogen rate. The second part of the paper looks at the deliberate design of taller caverns than usual which would also have to be filled using the gas lift method in the first fill phase. Source


The further development of the Etzel cavern field by IVG Caverns GmbH involves converting crude oil caverns to natural gas storage caverns. The planning and technical supervision of the conversion project is managed by KBB Underground Technologies GmbH. The nitrogen gas lift method was used for the first time in caverns towards the end of the gas first fill of caverns being converted in the Etzel cavern field. The successful implementation of the gas lift method meant that another ≈ 1/3 of the total cavern volume, i.e., 2,500,000 cu m in total, could be emptied of brine and filled with gas. A discussion covers the cost-benefit description of gas lift method; the practical experience with the gas lift method; the main factors influencing the brine displacement rate and nitrogen consumption; the deliberate design of taller caverns; and the potential gains in height, geometrical volume, and working gas volume. Source

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