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Carbonates and Evaporites

, Volume 34, Issue 4, pp 1583–1593 | Cite as

Microfacies and depositional environment of Asmari formation in the Zeloi oil field, Zagros basin, south-west Iran

  • Yasin Abyat
  • Ahmad AbyatEmail author
  • Abdolkhalegh Abyat
Original Article
  • 45 Downloads

Abstract

The Oligocene–Miocene Asmari Formation is well known as a major hydrocarbon reservoir in southwestern Iran. To study the microfacies and sedimentary environment of Asmari Formation in the Zagros basin (south-west Iran), No. 6 well and No. 11 well sections in Zeloi oil field were selected. 500 thin sections were studied for petrographic and facies analysis. Based on petrographic and sedimentology analysis of the Asmari Formation in these sections, 13 carbonate microfacies and 1 petrofacies can be identified into three main depositional environments consisting of: outer ramp, middle ramp and inner ramp. The outer ramp environment is characterized by the presence of abundant planktonic foraminifera and echinoid fragments. The middle ramp environment is represented by the presence of echinoids and planktonic foraminifera, red algae and perforate foraminifers. In the inner ramp, the most allochems are ostracoda, imperforate and perforate benthic foraminifera, algae ball, peloid and oncoid.

Keywords

Asmari Iran Zagros Zeloi Ramp 

Notes

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of GeologyIslamic Azad UniversityTehranIran
  2. 2.Young Researchers and Elite ClubIslamic Azad UniversityOmidiehIran
  3. 3.Department of Petroleum EngineeringIslamic Azad UniversityOmidiehIran

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