Grippen Gas announced drilling results from its Ekeby permit, onshore Sweden. Four shallow vertical wells test the prospectivity of biogenic gas from the organic-rich Cambro-Ordovician Alum shale over an area covering about 150km.

The prospective Alum shale was encountered at depths of 75-85 meters, and the wells had gas during the drilling. One well cored the Alum shale section. All wells were drill stem tested.

The laboratory measured methane content of a gas sample collected at GH-2 is 97.5%.

Grippen plans to drill two appraisal wells in 2Q 2012.