 |
|
Gas tightness test of a cavern |
 |
|
Drilling into the depth |
 |
|
Cavern construction by combined leaching process |
 |
|
Caverns in salt: Drilling and leaching |
 |
|
Cavern storage Etzel: Safe storage for oil and gas |
 |
|
Salt caverns: First fill and storage operation |
 |
|
Salt domes in Northern Germany: Total volume of salt sediments |
