Microfacies : depositional environments and diagenetic processes of the Mishrif and Yamama formations at Faiha and Sindibad oilfields, south Iraq
Other Title(s)
السحنات المجهرية : البيئات الترسيبية و العمليات التحويرية لتكويني المشرف و اليمامة في حقلي الفيحاء و السندباد، جنوب العراق
Joint Authors
Jufayt, Husayn Ulaywi
Hanzal, Aminah Mal Allah
Dahham, Nawfal Adnan
Source
Iraqi Bulletin of Geology and Mining
Issue
Vol. 16, Issue 2 (31 Dec. 2020), pp.51-74, 24 p.
Publisher
Ministry of Industry and Minerals Iraqi Geological Survey
Publication Date
2020-12-31
Country of Publication
Iraq
No. of Pages
24
Main Subjects
Earth Sciences, Water and Environment
Topics
Abstract EN
The Faiha and Sindibad oilfields are located in the northeastern part of the Basrah Governorate, south Iraq.
More than 50 thin sections of limestone samples, collected from wells penetrating the Mishrif and Yamama formations in these oilfields, are examined in this work.
Several microfacies are identified in the formations studied; four main facies and seven subfacies are found in the Yamama Formation and three main Formation.
The main microfacies include lime mudstone, wackestone, packstone and grainstone.
They were deposited in various marine sedimentary systems of open marine, foreslope, reef and lagoonal environments.
Benthonic foraminifera, Mollusk shells, echinoids, and algae, are the fossils identified in the Mishrif and Yamama formations.
Dolomite and calcite are the main minerals in the studied samples.
Petrographic examinations revealed that diagenesis varied in intensity from microfacies to another.
Dissolution and neomorphism (recrystallization) have created and controlled the development of porosity.
The dominant pore types are vuggy, interparticles, intraparticles, channel and moldic.
Whereas, cementation, micritization, and compaction processes have had destructive effects, by reducing porosity and permeability that led to reducing reservoir quality.
Other processes, such as dolomitization and authigenic minerals (pyrite) do not have strong effects on the reservoir quality.
The depositional basin model shows that the Yamama Formation was deposited in the ramp carbonate environment, whereas, the Mishrif Formation was deposited in the rimmed carbonate shelf environment-
American Psychological Association (APA)
Hanzal, Aminah Mal Allah& Jufayt, Husayn Ulaywi& Dahham, Nawfal Adnan. 2020. Microfacies : depositional environments and diagenetic processes of the Mishrif and Yamama formations at Faiha and Sindibad oilfields, south Iraq. Iraqi Bulletin of Geology and Mining،Vol. 16, no. 2, pp.51-74.
https://search.emarefa.net/detail/BIM-1024092
Modern Language Association (MLA)
Hanzal, Aminah Mal Allah…[et al.]. Microfacies : depositional environments and diagenetic processes of the Mishrif and Yamama formations at Faiha and Sindibad oilfields, south Iraq. Iraqi Bulletin of Geology and Mining Vol. 16, no. 2 (2020), pp.51-74.
https://search.emarefa.net/detail/BIM-1024092
American Medical Association (AMA)
Hanzal, Aminah Mal Allah& Jufayt, Husayn Ulaywi& Dahham, Nawfal Adnan. Microfacies : depositional environments and diagenetic processes of the Mishrif and Yamama formations at Faiha and Sindibad oilfields, south Iraq. Iraqi Bulletin of Geology and Mining. 2020. Vol. 16, no. 2, pp.51-74.
https://search.emarefa.net/detail/BIM-1024092
Data Type
Journal Articles
Language
English
Notes
Record ID
BIM-1024092