The Biostratigraphy of the Mishrif Formation at Selected Wells in Eridu Oilfield, Southern Iraq

Zain Alabdeen Tamkeen; Luay S.  Shakier

Article Details

The Biostratigraphy of the Mishrif Formation at Selected Wells in Eridu Oilfield, Southern Iraq

Authors:

Zain Alabdeen Tamkeen | Luay S. Shakier

Publisher:

Iraqi Geologists Union (Union of Iraqi Geologists)

Journal:

The Iraqi Geological Journal Vol.58 Issue 2D, pp.185-196

Document Type:

Article

Publication Date:

10/2025

Document Language:

English

Document ID (Org No.):

2001836907

pISSN:

2663-8754

Keywords:

Abstract:

 The major Cenomanian-Early Turonian carbonate reservoir represented by the Mishrif Formation is widely distributed across central and southern Iraq and the Arabian Gulf. This study investigates the Mishrif Formation within the Eridu Oilfield, situated between the Thi-Qar and Muthanna provinces in southwestern Iraq. Four wells—Eu-2, Eu-3, Eu-4, and Eu-7—were selected based on data availability and differences in reservoir thickness and depth. Core and cutting samples were collected at approximately 5 m intervals. Examination of 400 thin sections led to the identification of three concurrent biozones: Nezzazata simplex–Nezzazata conica, Pseudorhapydionina laurinensis–Praealveolina cretacea, and Pseudolituonella reicheli–Chrysalidina gradata. These results refine the biostratigraphic framework of the Mishrif Formation and contribute to a better understanding of paleoenvironmental variations and reservoir characteristics in the study area.

Article Details

The Biostratigraphy of the Mishrif Formation at Selected Wells in Eridu Oilfield, Southern Iraq

Authors:

Zain Alabdeen Tamkeen | Luay S. Shakier

Publisher:

Iraqi Geologists Union (Union of Iraqi Geologists)

Journal:

The Iraqi Geological Journal Vol.58 Issue 2D, pp.185-196

Document Type:

Article

Publication Date:

10/2025

Document Language:

English

Document ID (Org No.):

2001836907

pISSN:

2663-8754

Mishrif Formation

Biostratigraphy

Biozones

Eridu oilfield

Issues

Article Details

The Biostratigraphy of the Mishrif Formation at Selected Wells in Eridu Oilfield, Southern Iraq

Authors: Zain Alabdeen Tamkeen | Luay S. Shakier

Publisher: Iraqi Geologists Union (Union of Iraqi Geologists)

Journal: The Iraqi Geological Journal Vol.58 Issue 2D, pp.185-196

Document Type: Article

Publication Date: 10/2025

Document Language: English

Document ID (Org No.): 2001836907

pISSN: 2663-8754

Mishrif Formation

Biostratigraphy

Biozones

Eridu oilfield

Issues

Authors:

Zain Alabdeen Tamkeen | Luay S. Shakier

Publisher:

Iraqi Geologists Union (Union of Iraqi Geologists)

Journal:

The Iraqi Geological Journal Vol.58 Issue 2D, pp.185-196

Document Type:

Article

Publication Date:

10/2025

Document Language:

English

Document ID (Org No.):

2001836907

pISSN:

2663-8754