Biostratigraphy and Microfacies o f th e Sarvak Formation in well X-01 Bahregansar oil field, Persian Gulf

Subject Areas :

Kiana Kiarostami ¹ , Seyed Hamid Vaziri ² , Masoomeh Sohrabi Molayosefi ³ , Bijan Noori ⁴

1 - دانشجوی دکترای چینه شناسی و فسیل شناسی دانشگاه آزاد اسلامی واحد علوم و تحقیقات
2 - استاد گروه زمین شناسی دانشگاه آزاد اسلامی واحد تهران شمال
3 - استادیار گروه زمین شناسی دانشگاه آزاد اسلامی واحد اسلامشهر
4 - دانشجوی دکترای رسوب شناسی شرکت نفت فلات قاره ایران

Received: 2016-09-05 Accepted : 2016-09-05 Published : 2013-09-23

Keywords: sedimentary model, Ramp, Sarvak Formation, Biozone, Cenomanian,

Abstract :

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