Sequence stratigraphy and reservoir quality of the Gulf of Suez syn-rift deposits of the Nukhul formation: Implications of rift initiation and the impact of eustacy and tectonic on deposition

Ayyad, Haitham M.; Hewaidy, Abdel Galil A.; Omar, Mustafa; Fathy, Mohamed

doi:10.1016/j.marpetgeo.2023.106459

Cited by 2 publications

(1 citation statement)

References 73 publications

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“…The Miocene formations correspond to the sediments that were formed during the initial stage of the syn-rift period in the Gulf of Suez rift. Due to its diverse lithofacies distribution and excellent structural trap closure, it serves as the main hydrocarbon reservoir for numerous oil fields in the region [54,55].…”

Section: Tectonic and Stratigraphic Settingsmentioning

confidence: 99%

Hydrocarbon Reservoir Characterization in the Challenging Structural Setting of Southern Gulf of Suez: Synergistic Approach of Well Log Analyses and 2D Seismic Data Interpretation

Reda,

Mostafa,

Raef

et al. 2024

Preprint

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The Gulf of Suez is a sedimentary rift-basin with thick evaporites and complex structural settings that presents challenges to achieving quality imaging based on seismic reflection data. Such subsurface settings and the lack of 3D seismic data poses challenges in building reservoir models to guide hydrocarbon exploration and development, especially in southern parts the Gulf of Suez. This study attempts to overcome the challenges of both 2D seismic interpretation and building a static reservoir model of two Miocene reservoir formations, Ras Ghara Field, Southern Gulf of Suez. Integration of well log data analysis of nine wells and regional-tectonics cognizant 2D seismic interpretation of nineteen 2D seismic lines enabled a reliable 3D static reservoir model. The Miocene reservoir characterization reveals heterogeneity in lithofacies distribution, with thick evaporite sequences causing seismic reflection distortions. Significant hydrocarbon accumulations are associated with horst fault blocks. The Miocene reservoirs demonstrate effective porosity of 14-33%, water saturation of 16-65%, and hydrocarbon saturation of 35-84%. Two new prospects are identified based on structure, facies distribution, and petrophysical results, with estimated original oil in place (OOIP) of 2,002,404 stock tank barrels (STB) and 1,175,580 STB for the Kareem Formation, and 6,302,916 STB and 2,841,894 STB for the Rudeis Formation.

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Section: Tectonic and Stratigraphic Settingsmentioning

confidence: 99%

Hydrocarbon Reservoir Characterization in the Challenging Structural Setting of Southern Gulf of Suez: Synergistic Approach of Well Log Analyses and 2D Seismic Data Interpretation

Reda,

Mostafa,

Raef

et al. 2024

Preprint

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Reservoir Rock Discrimination Based on Integrated Image Logs and Petrographic Analysis: A Case Study from the Early Miocene Nukhul Carbonate, Southern Gulf of Suez, Egypt

Kassem,

Abdel Fattah,

Hassan

et al. 2024

Arab J Sci Eng

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The discrimination of rock types within the limestones and dolostones of the Nukhul Formation in the West Younis Field (Gulf of Suez Basin, Egypt) presents significant challenges due to their multi-scale compositional and diagenetic heterogeneity, diverse pore types, complex microstructures, and limited core data. This study aims to characterize the carbonate reservoir of the Early Miocene sediments and establish distinct reservoir rock types by employing textural analysis, geological interpretations (i.e., structural interpretation, fracture analysis, reservoir characteristics) using advanced imaging tools, and petrophysical measurements to model porosity/permeability profiles across the reservoir. A new dataset was obtained from the latest exploratory well in the West Younis Field, incorporating microresistivity and acoustic image logs, well logs, nuclear magnetic resonance (NMR) tools, and drill cutting petrographic analysis. The integration of these datasets provided a comprehensive understanding of the properties of the Early Miocene carbonate reservoir. Based on image logs, the carbonate facies were divided into four reservoir units. Petrographic evaluation further classified two facies (A and B) based on diagenetic factors controlling reservoir quality. The results revealed the occurrence of multiple phases of dolomitization, which influenced the reservoir quality. Early-stage dolomitization enhanced reservoir quality, while late-stage idiotopic dolomite crystal growth diminished it. The study also provided comprehensive information on the original rock fabric/texture, diagenetic processes, porosity types and origins, as well as the spatial distribution of pores (permeability index) within this complex carbonate reservoir. By employing an integrated technique, this study successfully differentiated the carbonate reservoir into distinct rock types, leading to improved reservoir characterization and field development. Additionally, the findings contribute valuable insights for the development and exploration of the Early Miocene carbonate section in the southern Gulf of Suez.

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Sequence stratigraphy and reservoir quality of the Gulf of Suez syn-rift deposits of the Nukhul formation: Implications of rift initiation and the impact of eustacy and tectonic on deposition

Cited by 2 publications

References 73 publications

Hydrocarbon Reservoir Characterization in the Challenging Structural Setting of Southern Gulf of Suez: Synergistic Approach of Well Log Analyses and 2D Seismic Data Interpretation

Hydrocarbon Reservoir Characterization in the Challenging Structural Setting of Southern Gulf of Suez: Synergistic Approach of Well Log Analyses and 2D Seismic Data Interpretation

Reservoir Rock Discrimination Based on Integrated Image Logs and Petrographic Analysis: A Case Study from the Early Miocene Nukhul Carbonate, Southern Gulf of Suez, Egypt

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