Microfacies and sedimentary environment of the Asmari Formation in Rag-e-safid oil field, south west Khouzestan

Subject Areas :

Nabi Allah Bidarvand ¹ , Nader Kohansal ghadimvand ² , Davood Jahani ³

1 - کارشناس ارشد رسوب شناسی و سنگ شناسی رسوبی دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران
2 - استادیار دانشگاه آزاد اسلامی واحد تهران شمال
3 - استادیار دانشگاه ازاد اسلامی واحد تهران شمال

Received: 2016-09-07 Accepted : 2016-09-07 Published : 2011-03-21

Keywords: microfacies, carbonate ramp, depositional facies, facies belts, Depositional environment,

Abstract :

Asmari Formation (oligo-Miocene) is the most important reservoir unit in south west of Iran oil Fields. The Rage-Safid oil field is one of them. This field is located in Dezful Embayment. In several studies, there are still someuncertainty about microfacieses and depositional environment of the Asmari formation in Rag-e-safid oil field.There for according to petrographical study of thin sections supplied of cores and cutting samples (2138 thinsections with 7 wells) and comparison of associated constituent facieses with standard microfacies types ofcarbonate ramps of Flugel (Flugel, 2004) and facies belts of Buxton and Pedley (Buxton and Pedley, 1989), 13carbonate microfacieses and 2 non carbonate microfacieses is investigated. The microfacieses are in five groupfacieses (depositional sub environment) that consist of open marine (group O), shoal or bar (group B), lagoon(group L), intertidal (group I) and supratidal (group S). The sub environment ascribed to a carbonate platformramp.