Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Geochemical evaluation of potential source rocks based on Rock-Eval pyrolysis and vitrinite reflectance analyses in Foroozan oil field

Document Type : Original Research Paper

Authors
1 Research Institute of Applied Science, Academic Center for Education, Culture and Research, Tehran, Iran
2 School of Geology, College of Science, University of Tehran, Tehran, Iran
Abstract
Geochemical evaluation of potential source rocks in Foroozan Field is carried out based on Rock-Eval pyrolysis and vitrinite reflectance analyses. For getting the results, 101 samples for Rock-Eval pyrolysis and 11 samples for vitrinite reflectance analysis were selected from Gurpi, Sarvak, Kazhdumi, Dariyan, Gadvan, Upper Fahliyan, and Neyriz Formations cuttings. The results were used to determine the quantity, quality, and maturity of organic matter and show that the average content of organic matter in the studied Formations range from poor to very good. According to the interpretations, the type of organic matter in the Gurpi, Sarvak, Upper Fahliyan, and Neyriz Formations are mostly type III kerogen, and they have not reached to appropriate maturity. However, the Kazhdumi, Dariyan, and Gadvan Formations mostly show type II kerogen which is not mature enough and have not yet entered the oil window. This group of formations can be considered suitable source rocks in the Foroozan field. Despite these formations are at the onset of the oil window, they have not produced hydrocarbon yet. Therefore, these formations or their equivalents in the deeper parts of the basin could be considered as active source rocks.
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