Univrsity of Tehran Press Geopersia 2228-7817 8 2 2018 07 01 Benthic foraminiferal and calcareous algal biostratigraphy of the Fahliyan Formation in oil well no. X1, Dorood Oilfield, Persian Gulf - 319 329 67245 10.22059/geope.2018.256557.648385 EN Leila Rostami Department of Geology, Faculty of Basic Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran Seyed Hamid Vaziri Department of Geology, Faculty of Basic Sciences, Islamic Azad University, North Tehran Branch, Tehran, Iran Davood Jahani Department Geology, Faculty of Basic Sciences, Islamic Azad University, North Tehran Branch Ali Solgi Department of Geology, Faculty of Basic Sciences, Islamic Azad University, Science and Research Branch,Tehran, Iran Morteza Taherpour Khalil Abad Department of Geology, Faculty of Science, Islamic Azad University, Mashhad Branch, Mashhad, Iran Ivana Carević Faculty of Geography, University of Belgrade, Belgrade, Serbia Ahmad Yahyaei Iranian Offshore Oil Company (IOOC), Tehran, Iran Journal Article 2018 04 26 The Dorood oilfield is located offshore in the northern part of the Persian Gulf. It partly underlies the Kharg Island. The Neocomian Fahliyan Formation represents the high-quality reservoir in the oilfield. It includes five carbonate members: The Manifa, Middle and Upper Yamama, Khami and Lower Ratawi. The Fahliyan Formation in the studied well attains a thickness of 378.1 m and mainly consists of thin-bedded limestones. It unconformably overlies the evaporate Hith Formation and conformably underlies the Gadvan Formation. An integrated biostratigraphic (benthic foraminifera and algae) and lithostratigraphic study is presented. Paleontological studies led to the identification of 19 genera and 29 species of benthic foraminifera and 10 genera and 9 species of calcareous algae. Two biozones of Berriasian through Valanginian age have been recognized. These are Lithocodium aggregatum-Salpingoporella muehlbergii assemblage zone (Valanginian) and Pseudocyclammina lituus- Coscinoconus assemblage zone (Berriasian-Valanginian). https://geopersia.ut.ac.ir/article_67245_3fcd45ef25bbcf85f0888a1010dfb5bd.pdf