Biostratigraphy and Microfacies of the Sarvak Formation in well X-01 Bahregansar oil field, Persian Gulf

Bahregansar oil field, oil fields, located on the southern slopes of the Dezful Embayment and the North West is located in the Persian Gulf. Biostratigraphic studies in the field of 56 thin sections of limestones Sarvak has been studied.Formation of the 11 species of 17 genera were identified based on their fossil, three zones can be biozons zones of the things introduced by Wynd (1965) fits presented. I-Nezzazata - Alveolinids Assemblage Zone # 25 II-Rudist debris # 24 III-"Oligostegina"facies # 26 These biozones indicated a Cenomanian age for the Sarvak Formation in the studied section which is composed of pelagic and neretic facies. In the studied section, the Sarvak Formation has a transitional contact with the Kazhdumi Formation and i covered by the Ilam Formation di conformable. Microfiche ’ tudy indicated that the Sarvak Formation was deposited in open marine, barrier and lagoonal environments. These studies suggested a carbonate platform of ramp for the formation.