Reuters: German shale gas reserves up to 22 trln cbm - study

Unconventional gas reserves in Germany amount to trillions of cubic metres (cbm) and can be safely exploited if the right rules are in place, federal authorities said on Monday with the release of the first findings of an ongoing long-term study.

The Federal Institute for Geosciences and Natural Resources (BGR) said between 0.7 trillion and 2.3 trillion cbm of the gas could be technically extracted. 

This is calculated as a 10 percent extraction rate they believe is achievable from the 6.8 trillion-22.6 trillion cbm of shale gas they have located in the country. MORE