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Stratigraphic correlation and paleoenvironmental analysis of the hydrocarbon-bearing Early Miocene Euphrates and Jeribe formations in the Zagros folded-thrust belt

  • D. HusseinEmail author
  • R. Collier
  • J. A. Lawrence
  • F. Rashid
  • P. W. J. Glover
  • P. Lorinczi
  • D. H. Baban
Original Paper

Abstract

The Lower Miocene Euphrates and Jeribe formations are considered as the main targets of the Tertiary petroleum system in the western part of the Zagros Basin. The formations consist of carbonates with some evaporate intercalations of the Dhiban Formation. This study utilized data from a field investigation including newly described outcrop sections and newly discovered productive oil fields within the Kirkuk embayment zone of the Zagros fold and thrust belt such as Sarqala and Kurdamir wells. This work is the first to show a stratigraphic correlation and paleoenvironmental interpretation by investigating both well data and new outcrop data. Three depositional environments were identified, (1) an inner and outer ramp belts environment, (2) shoal environment, and (3) restricted lagoon environment. Within these 3 environments, 12 microfacies were identified, based on the distribution of fauna mainly benthonic foraminifera, rock textures, and sedimentary structures. The inferred shallow water depths and variable salinities in both the Euphrates Formation and Jeribe Formation carbonates are consistent with deposition on the inner ramp (restricted lagoon and shoal) environments. Those found in the Euphrates Formation constrained the depositional environment to the restricted lagoon and shoal environment, while the microfacies in the Jeribe Formation provided evidence for an inner ramp and middle to outer ramp belt environments. This study represents the first detailed research that focuses on the stratigraphic correlation and changes in carbonate facies with the main aim to provide a wider understanding of stratigraphy of these carbonate reservoirs throughout the northern part of Iraq.

Keywords

Carbonate ramp Paleoenvironments Early Miocene carbonates Zagros 

Notes

Acknowledgements

We express our gratitude to the Ministry of Natural Resources of Kurdistan region for providing two licensed block data and the Ministry of Oil of the Iraqi government for providing well data.

Funding information

This study was funded by the Ministry of Higher Education of the Iraqi Kurdistan region government as a part of the Human Capacity Development Programme (HCDP) that is greatly appreciated.

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Copyright information

© Saudi Society for Geosciences 2017

Authors and Affiliations

  • D. Hussein
    • 1
    Email author
  • R. Collier
    • 2
  • J. A. Lawrence
    • 3
  • F. Rashid
    • 4
  • P. W. J. Glover
    • 4
  • P. Lorinczi
    • 2
  • D. H. Baban
    • 1
  1. 1.Geology DepartmentUniversity of SuliamaniKurdistan RegionIraq
  2. 2.School of Earth and EnvironmentUniversity of LeedsLeedsUK
  3. 3.Department of Civil and Environmental Engineering, Faculty of EngineeringImperial CollegeLondonUK
  4. 4.Oil, Gas and Energy Management DepartmentCharmo UniversityKurdistan RegionIraq

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