Estimate of upper cretaceous Source rock G1- NC 98 southeastern of sirte basin north-central part of Libya.

الملخص

The main source kitchens for the petroleum accumulations of the Eastern Embayment are composed of organic-rich shales present in the Rachmat and Sirt Shale formations of the Upper Cretaceous (Coniacian to Campanian) which have been buried sufficiently for oil generation on a very large scale. the geochemical analyses of the key Well G1 – NC 98, represents the upper part of Lower Sirt basin Succession have high value of Hydrogen Index with low Oxygen Index indicate that the significant hydrocarbon potentiality which indicates Kerogen Type II Oil prone with respect maturity. In Contrast the Lower Part of the Lower Sirt basin Succession characterized by medium values of Hydrogen Index with high (OI) values indicate Kerogen Type III Gas prone.