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Abstract
The present work is devoted to evaluate the source rock, hydrocarbon maturation and generation of some Miocene rocks include Kareem and Rudeis formations for GS 197-1, GS 197-2, GS 207-1, GS 216-1, WFA-1, WFB-1, GG 85-1 and HH 84-1 wells except GG 85-2 well because it doesn’t reach to Kareem or Rudeis Formation, scattered in west Feiran area in central part of the Gulf of Suez between longitudes 33° 00 and 33° 18’ E and latitudes 28° 40’ and 28° 50’ N.
This study is based on geochemical data includes Rock-Eval pyrolysis, Vitrinite reflectance (Ro%) and Thermal alteration index (TAI) and geophysical data includes Calculated vitrinite reflectance (Roc%) and Time temperature index (TTI).
Organic carbon richness of Kareem and Rudeis formations on the bases of TOC values, is ranged from fair to good source rock in most of studied wells and sometimes they have poor source intervals. Rock-Eval pyrolysis data as S1 and S2 reflect that the mentioned formations are considered mainly poor to fair source rocks, this is mainly related to the nature of organic matter which is mainly of mixed type II/III in which type III is the main component.
The organic matter present in Kareem and Rudeis formations at WFA-1, GS 197-2 and WFB-1 wells are of two main types; type II and mixed type II/III kerogen, but Rudeis Formation at WFB-1 has different types of organic matter of type I, II, mixed type II/III, III and IV kerogen.
Finally, the sedimentary organic matter present in both Kareem and Rudeis formations is present in immature to marginal maturation stage at HH 84-1, GS 197-2, WFA-1 and WFB-1 wells and reach to maturation stage at GG 85-1 well. So Kareem and Rudeis formations are not the main source rocks and the produced hydrocarbons in the study area may be product of the lower rock units as Esna and Duwi (Brown limestone).