مقاله


کد مقاله : 13951111185514812

عنوان مقاله : Biostratigraphy, microfacies and sequence stratigraphy of the Asmari Formation (based on Cyclolog) in the Qaleh Nar Oli field, Zagros Basin

نشریه شماره : 12 Autumn-Winter 2016

مشاهده شده : 267

فایل های مقاله :


نویسندگان

  نام و نام خانوادگی پست الکترونیک مرتبه علمی مدرک تحصیلی مسئول
1 abbas Ghaderi aghaderi@um.ac.ir Associate Professor PhD
2 adel neisi adel.neisi.n@gmail.com Post Graduate Student M.E
3 ali Ghobeishav aghobishavi2@gmail.com Graduate PhD
4 mohmmad Allahkarampour-Dill mohammada42@gmail.com Post Graduate Student M.A

چکیده مقاله

In this research, biostratigraphy, microfacies, sedimentary environments and sequence stratigraphy (using by Cyclolog software) of the Asmari Formation are carried out. These studies are done on the basis of 580 samples (core and cutting) from 430 meters thickness of the formation from the well #2 of the Qaleh-Nar oilfield. Paleontological studies are led to identification of 23 genera and 28 species of the benthic and planktonic foraminifera. According to these microfossils, four assemblage zones have been recognized which confirm the age of Oligocene (Rupelian – Chattian) and Early Miocene (Aquitanian – Burdigalian) for the whole formation. Paleoenvironmental studies demonstrate 9 different microfacies that were deposited in the outer ramp (open marine) in the lower Asmari part, middle ramp (open marine to shoal) in the middle Asmari part and the inner ramp environment (tidal flat to lagoon) in the upper Asmari part. The sequence stratigraphy on the well #2 and the auxiliary well numbers 1, 3, 5, 6 and 7 of the Qaleh-Nar oilfield using by Cyclolog software reveals 7 positive breaks and 9 negative break levels alternatively. Some of the positive breaks define sequence boundaries and some of the negative breaks present the maximum flooding surfaces. In addition, a number of positive levels specify the major chronozone (stage boundaries). Comparison of the quintuple reservoir zones of the Asmari Formation in the Qaleh-Nar oilfield with the mentioned break levels suggests a fine correlation with these levels; however this correlation is invalid for other levels.