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Abstract
The Kazerun transverse fault truncate divides the Zagros fold-thrust belt into the Fars and Lorestan–Khuzestan zones of the Zagros Mountain, Iran. Tectonic activity of the Kazerun fault zone causes uplifting and further flexuring of the Gisakan anticline in the Zagros Mountain and consequently brings outcropping of potential hydrocarbon sources and reservoir rocks (older than middle Cretaceous to Miocene). The presence of oil seepage (i.e. oil spring) in the southwestern flank of the dry anticline in the study area appears to originate from nearby oil fields. In this research an attempt has been made to emphasize the role of the Kazerun fault. Using geoinformation technology (GiT) such as remote sensing and several field investigations the presence of the Kazerun fault zone (KFZ) can be emphasized. This integrates with subsurface structures to increase the accuracy of opportunity for oil exploration. GIS techniques are used to analyse the role of the Kazerun fault for oil seepage. The results showed that KFZ cuts through the Nargesi oil field in the Zagros Mountain. It probably generates oil drainage from the Nargesi oil field to the southwestern flank of the Gisakan dry anticline.
Acknowledgements
This research was supported by the National Iranian South Oil Company (NISOC). The authors wish to thank Dr. H. Amiri Bakhtiar, Head of Geology Department, NISOC and Dr. H. Ghalavand for valuable support. Special thanks go to Mr M. Seraj for his cooperation during the field checks.