Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt
Global sea-level rise during the Early Turonian-Late Cenomanian Bonarelli event resulted in oceanic anoxia and deposition of organic-rich source rocks across Northern Africa, such as the Late Cretaceous Abu Roash-F carbonates. Here, using thin sections, SEM, XRF, standard core analysis, and Rock-Eva...
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ftsouthampton:oai:eprints.soton.ac.uk:490136 2024-06-23T07:56:17+00:00 Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt Farouk, Sherif Sen, Souvik Ahmed, Fayez Qteishat, Abdelrahman Al-Kahtany, Khaled Moreno, Hector Marin Mitra, Sourav Arafat, Mohamed 2024-07 text https://eprints.soton.ac.uk/490136/ https://eprints.soton.ac.uk/490136/1/ms_clean_copy_AR-F_28April2024.docx en English eng https://eprints.soton.ac.uk/490136/1/ms_clean_copy_AR-F_28April2024.docx Farouk, Sherif, Sen, Souvik, Ahmed, Fayez, Qteishat, Abdelrahman, Al-Kahtany, Khaled, Moreno, Hector Marin, Mitra, Sourav and Arafat, Mohamed (2024) Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt. Journal of African Earth Sciences, 215, [105272]. (doi:10.1016/j.jafrearsci.2024.105272 <http://dx.doi.org/10.1016/j.jafrearsci.2024.105272>). cc_by_nc_nd_4 Article PeerReviewed 2024 ftsouthampton https://doi.org/10.1016/j.jafrearsci.2024.105272 2024-06-12T00:24:02Z Global sea-level rise during the Early Turonian-Late Cenomanian Bonarelli event resulted in oceanic anoxia and deposition of organic-rich source rocks across Northern Africa, such as the Late Cretaceous Abu Roash-F carbonates. Here, using thin sections, SEM, XRF, standard core analysis, and Rock-Eval pyrolysis data, we examine the petrographic and geochemical properties of the Abu Roash-F (AR-F) carbonate source rocks. These deep marine carbonates consist of dominantly planktonic foraminifera and calcispheres and are classified as wackestone. Extensive micritization, calcite cementation, and ferroan dolomite cement replacement (filling the bioclastic tests and chambers) are identified as the principal diagenetic factors. Core measurements indicate that these carbonates have very low porosity below 3% and horizontal permeability of 0.003 mD (3x10-18 m2), which is also supported by the observed isolated nanopores in SEM. The elemental concentration from the XRF data confirms a highly reducing depositional environment that facilitated the organic richness during the Early Turonian Oceanic Anoxia Event 2 (OAE2). The studied carbonate interval consists of Type-II kerogen in the oil window with a Tmax of about 440 °C and up to 4.2 wt.% TOC indicating ‘fair’ to ‘excellent’ organic richness and a very high probability of active oil generation and expulsion. Following the wireline logs and core data, the self-sourcing unconventional reservoir potential of the AR-F carbonates has been emphasized. Article in Journal/Newspaper Planktonic foraminifera University of Southampton: e-Prints Soton Journal of African Earth Sciences 215 105272 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
Global sea-level rise during the Early Turonian-Late Cenomanian Bonarelli event resulted in oceanic anoxia and deposition of organic-rich source rocks across Northern Africa, such as the Late Cretaceous Abu Roash-F carbonates. Here, using thin sections, SEM, XRF, standard core analysis, and Rock-Eval pyrolysis data, we examine the petrographic and geochemical properties of the Abu Roash-F (AR-F) carbonate source rocks. These deep marine carbonates consist of dominantly planktonic foraminifera and calcispheres and are classified as wackestone. Extensive micritization, calcite cementation, and ferroan dolomite cement replacement (filling the bioclastic tests and chambers) are identified as the principal diagenetic factors. Core measurements indicate that these carbonates have very low porosity below 3% and horizontal permeability of 0.003 mD (3x10-18 m2), which is also supported by the observed isolated nanopores in SEM. The elemental concentration from the XRF data confirms a highly reducing depositional environment that facilitated the organic richness during the Early Turonian Oceanic Anoxia Event 2 (OAE2). The studied carbonate interval consists of Type-II kerogen in the oil window with a Tmax of about 440 °C and up to 4.2 wt.% TOC indicating ‘fair’ to ‘excellent’ organic richness and a very high probability of active oil generation and expulsion. Following the wireline logs and core data, the self-sourcing unconventional reservoir potential of the AR-F carbonates has been emphasized. |
format |
Article in Journal/Newspaper |
author |
Farouk, Sherif Sen, Souvik Ahmed, Fayez Qteishat, Abdelrahman Al-Kahtany, Khaled Moreno, Hector Marin Mitra, Sourav Arafat, Mohamed |
spellingShingle |
Farouk, Sherif Sen, Souvik Ahmed, Fayez Qteishat, Abdelrahman Al-Kahtany, Khaled Moreno, Hector Marin Mitra, Sourav Arafat, Mohamed Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt |
author_facet |
Farouk, Sherif Sen, Souvik Ahmed, Fayez Qteishat, Abdelrahman Al-Kahtany, Khaled Moreno, Hector Marin Mitra, Sourav Arafat, Mohamed |
author_sort |
Farouk, Sherif |
title |
Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt |
title_short |
Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt |
title_full |
Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt |
title_fullStr |
Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt |
title_full_unstemmed |
Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt |
title_sort |
assessment of the upper cretaceous abu roash carbonate source rocks from the beni suef field, western desert, egypt |
publishDate |
2024 |
url |
https://eprints.soton.ac.uk/490136/ https://eprints.soton.ac.uk/490136/1/ms_clean_copy_AR-F_28April2024.docx |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://eprints.soton.ac.uk/490136/1/ms_clean_copy_AR-F_28April2024.docx Farouk, Sherif, Sen, Souvik, Ahmed, Fayez, Qteishat, Abdelrahman, Al-Kahtany, Khaled, Moreno, Hector Marin, Mitra, Sourav and Arafat, Mohamed (2024) Assessment of the Upper Cretaceous Abu Roash carbonate source rocks from the Beni Suef field, Western Desert, Egypt. Journal of African Earth Sciences, 215, [105272]. (doi:10.1016/j.jafrearsci.2024.105272 <http://dx.doi.org/10.1016/j.jafrearsci.2024.105272>). |
op_rights |
cc_by_nc_nd_4 |
op_doi |
https://doi.org/10.1016/j.jafrearsci.2024.105272 |
container_title |
Journal of African Earth Sciences |
container_volume |
215 |
container_start_page |
105272 |
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1802649276818391040 |