Depositional Trends and Sedimentary Environments of the Cenomanian-Turonian Sediments along G. Nezzazat-G. Ekma, South-West Sinai, Egypt

Fawal, Farouk M. El; Hassan, Hatem F.; Shehata, Amer A.

doi:10.9790/0990-02222738

Cited by 3 publications

(1 citation statement)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Cenomanian Raha Formation and its equivalents all over Egypt have been deposited in a shallow marine environment during the major Cenomanian transgression (Kerdany and Cherif, 1990;Schütz, 1994;Anan et al, 2013;El Fawal et al, 2014). The qualitative and quantitative analyses of POM constituents encountered within the Raha Formation indicate three depositional palaeoenvironmental settings.…”

Section: Palynofacies and Palaeoenvironmentalmentioning

confidence: 99%

Palynology of the Cenomanian Raha Formation, Gulf of Suez, Egypt: Biostratigraphical, palaeoenvironmental and palaeobiogeographical implications

Mohamed

Mansour

Tahoun

et al. 2018

Austrian Journal of Earth Sciences

View full text Add to dashboard Cite

The current study presents a fully qualitative palynological investigation carried out on the Raha Formation encountered from three wells in the Bakr Oil Field of the Gulf of Suez, Egypt. Around 30 species of pteridophytic spores, 26 species of angiosperm pollen, 24 species of gymnosperm pollen and 27 species of dinoflagellate cysts have been recorded. However, achritarchs, microforaminiferal test linings and freshwater algae are impoverished and sparsely documented throughout the Raha Formation. Two palynozones have been identified based on some stratigraphically significant pollen and spores, arranged from youngest to oldest: (1) Palynozone I (Classopollis brasiliensis–Tricolpites sagax Assemblage Zone) of late Cenomanian age; (2) Palynozone II (Afropollis jardinus–Crybelosporites pannuceus Assemblage Zone) of early-middle Cenomanian age. The distribution and ecological affiliation of specific palynomorph species, as well as various palynofacies parameters, are interpreted. A shallow marine environment from supratidal to distal inner neritic under proximal suboxic–anoxic to dysoxic–anoxic shelf conditions is reconstructed. Palaeobiogeographically, the absence of elaters from the recovered taxa is interpreted in terms of minor floral variation. This may be attributed to climatic and/or an environment-controlled niche establishment, which possibly was shaped by the existence of a physical barrier hindering the distribution of such type of elaterate parent plants.

show abstract

Section: Palynofacies and Palaeoenvironmentalmentioning

confidence: 99%

Palynology of the Cenomanian Raha Formation, Gulf of Suez, Egypt: Biostratigraphical, palaeoenvironmental and palaeobiogeographical implications

Mohamed

Mansour

Tahoun

et al. 2018

Austrian Journal of Earth Sciences

View full text Add to dashboard Cite

show abstract

Facies analysis and sequence-stratigraphic control on reservoir architecture: Example from mixed carbonate/siliciclastic sediments of Raha Formation, Gulf of Suez, Egypt

Shehata

Kassem

Brooks

et al. 2021

Marine and Petroleum Geology

View full text Add to dashboard Cite

Depositional and diagenetic controllers on the sandstone reservoir quality of the late cretaceous sediments, Gulf of Suez Basin

Kassem

2023

Interpretation

View full text Add to dashboard Cite

The complex of depositional, burial, and diagenetic histories of the Late Cretaceous Nezzazat Group sandstones in Northeastern Africa present the main challenges with regard to reservoir quality. The quality of commercial reservoirs is maintained despite deep burial and the associated high temperature and pressure. The study presents optimum integration of different dataset to address the reservoir quality and reservoir performance controllers. The dataset includes measured porosity and permeability, petrographic point counting data, grain size analysis, X-ray diffraction data, scanning electron microscopy and compaction porosity loss by. The depositional controls on the reservoir quality are the facies, where the higher quality found in the channel and the upper shoreface settings. The coarse-grained sandstone associated with better reservoir quality. The large intergranular porosity is the main porosity control to the fluid to flow. The massive and laminated sandstones are the best quality facies. The labile grains (feldspars and mica) control the permeability distribution. While the secondary diagenetic controllers are the carbonate cementation that inhibited the effects of compaction. The siderite cementation has resulted in a micropore dominated and highly tortuous pore system. Total porosity has largely been preserved in the siderite-cemented sample but virtually eliminated in the dolomite cemented. Low volume of illite associated with better reservoir quality. While the better reservoir quality associated with abundant quartz cementation that protected the primary porosity from compaction. Compaction act as a significant porosity loss factor during diagenesis. Authigenic kaolinite does not significantly affect the reservoir quality. The reservoir sensitivity to formation damage come from the potential for fines (kaolinite, illitic clays, siderite and pyrite) migration within the pore system that are readily to mobilize by fluid flow.

show abstract

Depositional Trends and Sedimentary Environments of the Cenomanian-Turonian Sediments along G. Nezzazat-G. Ekma, South-West Sinai, Egypt

Abstract: Abstract:The Upper Cretaceous sedimentary succession at G. Nezzazat-G. Ekma, west-central

Cited by 3 publications

References 24 publications

Palynology of the Cenomanian Raha Formation, Gulf of Suez, Egypt: Biostratigraphical, palaeoenvironmental and palaeobiogeographical implications

Palynology of the Cenomanian Raha Formation, Gulf of Suez, Egypt: Biostratigraphical, palaeoenvironmental and palaeobiogeographical implications

Facies analysis and sequence-stratigraphic control on reservoir architecture: Example from mixed carbonate/siliciclastic sediments of Raha Formation, Gulf of Suez, Egypt

Depositional and diagenetic controllers on the sandstone reservoir quality of the late cretaceous sediments, Gulf of Suez Basin

Contact Info

Product

Resources

About