GeoDesign

Lower Silurian shales: are organic rich shales with TOC up to 17 %, which makes it the main source rock for the Ordovician reservoirs in Saharien platform, during the drilling operation it gives positive gas show, because shale creates certain porosity between its layers, there where the hydrocarbon is adsorbed.
As a result : Silurien shales become a favorite as an unconventional reservoir using the hydraulic fracturation method for exploitation.