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DOI	10.1016/j.coal.2019.05.014
	Palynological and organic geochemical studies of the Upper Jurassic-Lower Cretaceous successions, Western Desert, Egypt: Implications for paleoenvironment and hydrocarbon source rock potential
	El Atfy, Haytham 1; Ghassal, Bandar I.2; Maher, Ahmed 3; Hosny, Atef 3; Mostafa, Alaa 3; Littke, Ralf 4
通讯作者	El Atfy, Haytham
来源期刊	INTERNATIONAL JOURNAL OF COAL GEOLOGY
ISSN	0166-5162
EISSN	1872-7840
出版年	2019
卷号	211
英文摘要	The Upper Jurassic-Lower Cretaceous successions in the north Western Desert of Egypt are one of the most prolific hydrocarbon plays in North Africa. However, the source rock characteristics and depositional environments are still poorly understood. The current work assesses these sedimentary sections utilizing an integrated palynofacies and organic geochemical approach for a comprehensive source rock characterization. The investigation was carried out on 70 samples from the OBA. 3-1/1A (interval: 2540 to 3650 m) and OBA. S-C (interval: 2705 to 3782 m) wells. The results obtained are sufficient to categorically establish two types of organofacies linked to depositional environments and kerogen types, namely palynofacies PF I and PF II. The first facies (PF I) is characterized by kerogen type II and III and occurs in the Alamein and Alam El Bueib members of the Lower Cretaceous Burg El Arab Formation. This is further confirmed by pyrolysis results that revealed fair organic richness and gas generation potential in the Alamein Member with TOC ranges from 1.0 to 2.5 wt% and HI from 64 to 112 mg HC/gTOC). The Alam El Bueib Member illustrated better organic richness and quality with TOC ranges from 1.6 to 3.1 wt% and HI from 121 to 318 mg HC/gTOC. The thermal maturity assessment indicates that the Alamein Member is immature and the Alam El Bueib Member is early to oil-mature. PF II occurs in the Jurassic Masajid Formation, which is a transitional mature to overmature, fair to good source rock with mixed kerogen type II and III (TOC 1.3 to 2.4 wt% and HI 148 to 238 mg HC/gTOC). The paleoenvironmental conditions were deduced mainly from the APP ternary plot. The Alamein and Alam El Bueib members were deposited in a suboxic to anoxic basin, whereas the Masajid Formation was deposited under distal, dysoxic to anoxic basinal or proximal, suboxic to anoxic shelf conditions. In summary, it is concluded that the Late Jurassic and Early Cretaceous witnessed deposition of gas-prone source rocks similar to those found in the southern onshore Nile Delta Basin. The results have significant implications for the understanding of the source rock types in the northern onshore and offshore Egyptian basins and the future of the gas exploration.
英文关键词	Palynology Palynofacies Organic geochemistry Cretaceous Jurassic Egypt
类型	Article
语种	英语
国家	Egypt ; Saudi Arabia ; Germany
收录类别	SCI-E
WOS记录号	WOS:000478711100012
WOS关键词	PALYNOFACIES ; PALYNOSTRATIGRAPHY ; BIOSTRATIGRAPHY ; SEDIMENTS ; WELL ; CLASSIFICATION ; PYROLYSIS ; POLLEN ; SPORES ; BASIN
WOS类目	Energy & Fuels ; Geosciences, Multidisciplinary
WOS研究方向	Energy & Fuels ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216395
作者单位	1.Mansoura Univ, Fac Sci, Dept Geol, Mansoura 35516, Egypt; 2.Saudi Aramco, Dhahran, Saudi Arabia; 3.Al Azhar Univ, Fac Sci, Dept Geol, Assiut 71524, Egypt; 4.Rhein Westfal TH Aachen, Inst Geol & Geochem Petr & Coal, Energy & Mineral Resources Grp EMR, D-52056 Aachen, Germany
推荐引用方式 GB/T 7714	El Atfy, Haytham,Ghassal, Bandar I.,Maher, Ahmed,et al. Palynological and organic geochemical studies of the Upper Jurassic-Lower Cretaceous successions, Western Desert, Egypt: Implications for paleoenvironment and hydrocarbon source rock potential[J],2019,211.
APA	El Atfy, Haytham,Ghassal, Bandar I.,Maher, Ahmed,Hosny, Atef,Mostafa, Alaa,&Littke, Ralf.(2019).Palynological and organic geochemical studies of the Upper Jurassic-Lower Cretaceous successions, Western Desert, Egypt: Implications for paleoenvironment and hydrocarbon source rock potential.INTERNATIONAL JOURNAL OF COAL GEOLOGY,211.
MLA	El Atfy, Haytham,et al."Palynological and organic geochemical studies of the Upper Jurassic-Lower Cretaceous successions, Western Desert, Egypt: Implications for paleoenvironment and hydrocarbon source rock potential".INTERNATIONAL JOURNAL OF COAL GEOLOGY 211(2019).