Hydrocarbon source potential of the Upper Jurassic Naokelekan Formation, Northwestern Zagros Basin, Northern Iraq: An organic geochemical approach

This work depends on a detailed organic geochemical study of collected samples from the Upper Jurassic Naokelekan formation, from Ajil and Balad Oilfield. This study has manifested the advantages pyrolysis geochemical methods for source rock evaluation of the studied formations, thirty four core and cutting rock samples. Rock-Eval pyrolysis data indicate a wide variation of source richness and quality, the Naokelekan samples indicates good to excellent source rock richness , the kerogen Type-II/III( oil and gas prone) and type II kerogen (oil prone), in immature to mature stage (early oil window), reflect the marine environment with terrigenous influx.