Maturity Modelling and Hydrocarbon Charge In South-Western Berkine Basin, Eastern Algeria

The South-western Berkine basin is a depression bordered by two structural trends (Rhoure- Nouss and Gassi- Touil- Nezla) associated to important gas and oil fields whose Triassic and upper Silurian reservoirs are sourced from Silurian hot shale. These radioactive shales, at the base of the Silurian formation, are dated Llandovery. They are 10-60m thick in the structural zones and up to 80m in the Marfeg trough. The organic matter is marine type II. The organic richness is fair to good, the TOC values range from 2 to 8%. The maturity level decreased from the Marfeg trough (dry gas window) to the flanks (Rhourde-Nouss- Hassi-Touareg) (oil window).