Organic Geochemical Characteristics of Pre and Syn-rift source rocks in the Geisum concession, south Gulf of Suez, Egypt
Lotfy, N., Farouk, S., ElBehery, A. (2025). Organic Geochemical Characteristics of Pre and Syn-rift source rocks in the Geisum concession, south Gulf of Suez, Egypt. EKB Journal Management System, 68(5), 431-443. doi: 10.21608/ejchem.2024.320225.10411
Naira Magdy Lotfy; Sherif Farouk; Ahmed k. ElBehery. "Organic Geochemical Characteristics of Pre and Syn-rift source rocks in the Geisum concession, south Gulf of Suez, Egypt". EKB Journal Management System, 68, 5, 2025, 431-443. doi: 10.21608/ejchem.2024.320225.10411
Lotfy, N., Farouk, S., ElBehery, A. (2025). 'Organic Geochemical Characteristics of Pre and Syn-rift source rocks in the Geisum concession, south Gulf of Suez, Egypt', EKB Journal Management System, 68(5), pp. 431-443. doi: 10.21608/ejchem.2024.320225.10411
Lotfy, N., Farouk, S., ElBehery, A. Organic Geochemical Characteristics of Pre and Syn-rift source rocks in the Geisum concession, south Gulf of Suez, Egypt. EKB Journal Management System, 2025; 68(5): 431-443. doi: 10.21608/ejchem.2024.320225.10411

Organic Geochemical Characteristics of Pre and Syn-rift source rocks in the Geisum concession, south Gulf of Suez, Egypt

Egyptian Journal of Chemistry
Volume 68, Issue 5, May 2025, Page 431-443  XML PDF (3.26 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2024.320225.10411
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Authors
Naira Magdy Lotfy email orcid 1; Sherif Farouk1; Ahmed k. ElBehery2
1Exploration Department, Egyptian Petroleum Research Institute, Nasr City 11727, Egypt
2South Valley Egyptian Petroleum Holding Company- Nasser city - Cairo
Abstract
This study provides a comprehensive geochemical analysis of pre-rift and syn-rift source rocks from the Geisum Concession, Gulf of Suez, utilizing biomarker distributions, Rock-Eval pyrolysis, and vitrinite reflectance data to evaluate hydrocarbon generation potential. Total Organic Carbon (TOC) values range from 1.0 to 7.27 wt%, with pre-rift formations showing higher organic content compared to syn-rift formations. The kerogen types identified span Type I, II, and III, with pre-rift formations predominantly containing Type II kerogen, suggesting a higher potential for oil generation. Biomarker analysis reveals a strong marine influence, evidenced by the dominance of C30 hopanes and the presence of C27 steranes, with minimal terrigenous input. The C32 homohopane ratios (22S/22R) indicate that the source rocks are in the early oil window, corroborated by Tmax, PI, and vitrinite reflectance (Ro%) data. Pre-rift formations show stratified, anoxic depositional conditions, while syn-rift formations exhibit less reducing environments. These findings suggest that pre-rift formations in deeper stratigraphic sections may offer higher hydrocarbon potential, particularly in the oil generation window. The results highlight the significance of these source rocks in regional petroleum exploration.
Keywords
Geisum Concession; Biomarkers; source rocks; thermal maturity
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