Zakeen and Faraghoun Formation as New Source Rocks of Palaeozoic Era in Persian Gulf and Coastal Fars South Iran

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Abstract

Summary One of the most important and prevalent methods is been addressed Rock-Eval pyrolysis. In this study we have investigated and evaluated source rocks (Sarchahan, Zakeen, Faraghoun) with the method of non-identical temperature by the means of Rock-Eval 6 apparatus in the Persian Gulf and the Coastal Fars. In this study, Rock-Eval pyrolysis has been accomplished with heating rate of 25 °C/min, furthermore for reaching kinetic parameter, this analysis is done with 3 different heating rates of 5 15, 25 °C/min with Optkin software. Analysis shows that kerogen types for different formations as below, Sarchahan: kerogen type II, II/III and HI of 93 mg/g, Zakeen: kerogen type III, II/III and HI 49 mg/g and Faraghoun: kerogen type III and HI 150 mg/g. In Former studies of this area, the only known source rock is said to be as Sarchahan Formation. But with investigation of paleo logs, Rock-Eval analysis and kinetic parameters we can state that the presence of this shale layer (coal layer) in studied formation, we state that not only Sarchahan is a source rock, but also Zakeen and Faraghoun formations can play a good role as prolific source rocks.

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