干旱区生态环境知识资源中心(Arid): Petrographic and diagenetic study of siliciclastic Jurassic sediments from the northeastern margin of Africa: Implication for reservoir quality

Arid

DOI	10.1016/j.petrol.2020.108340
	Petrographic and diagenetic study of siliciclastic Jurassic sediments from the northeastern margin of Africa: Implication for reservoir quality
	Kassem, Ahmed A.; Hussein, Walid S.; Radwan, Ahmed E.; Anani, Nasr; Abioui, Mohamed; Jain, Sreepat; Shehata, Amer A.
通讯作者	Kassem, AA (corresponding author), Gulf Suez Petr Co, Explorat Dept, Cairo, Egypt.
来源期刊	JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
ISSN	0920-4105
EISSN	1873-4715
出版年	2021
卷号	200
英文摘要	Northeastern Egypt is one of the most important exposures in the Middle East and North Africa to study Jurassic facies. The present study analyzes 130 thin sections from a subsurface well (Well X) in the northern Gulf of Suez, and from two surface sections at Gebel Maghara (north Sinai) and Khashm Elgalala (North Eastern Desert), Egypt for petrographic and lithofacies analyses. In the present study, detailed petrographic analysis is used as a tool to better understand the diagenetic history of the Early to Late Jurassic siliciclastic sediments; the identified diagenetic elements are inferred concerning the reservoir quality. For this, sidewall cores, scanning electron microscopy and thin sections are used to detail detrital and authigenic mineralogy; these are then used to infer the depositional framework, factors controlling reservoir characteristics, and the operating diagenetic processes. The inferred depositional paleoenvironment is a prograding and retrograding linear siliciclastic shoreline within a shallow marine carbonate platform with coal swamps and occasional cross-cutting rivers. Diagenesis, petrographical characteristics and depositional conditions are the main factors controlling continental and marine reservoir architecture. The diagenetic processes affecting siliciclastic sedimentation are near the surface, shallow to intermediate burial, and deep burial cycles with different pore fluid filling at each stage. The siliciclastic sediments have been categorized into seven depositional lithofacies - calcareous claystone (S1a), carbonaceous claystone (S1b), siltstone (S2), planar and trough cross-bedded sandstone (S3), coarse, well rounded, large scale trough cross-bedded sandstone (S4), ooid sandstone (S5) and coal (C). Grain compaction, various phases of syntaxial quartz overgrowth, carbonate cementation and replacement, creation of dissolution porosity, and clay authigenesis are the most important diagenetic processes that have affected the siliciclastic continental and marine sediments. Many different diagenetic events, both destructive and constructive, have modified porosity. The destructive events include compaction and cementation (of silica, kaolinite, ferroan dolomite, Illite, and anhydride). The constructive events include silica cementation, feldspar dissolution, and ferroan dolomite dissolution. Additionally, present data also suggest that the continental sandstones have excellent reservoir quality whereas the marine sandstones have good to very good reservoir potential. Despite the excellent reservoir quality of the continental sandstone lithofacies, the effective stratigraphic seal is leaking. The interbedded calcareous and carbonaceous claystone lithofacies may provide an excellent stratigraphic seal for these siliciclastic reservoirs. Based on these analyses, a model is proposed that can be used as a template for subsurface Jurassic reservoir characterization and reservoir discrimination.
英文关键词	Northeastern Egypt Lithofacies Petrography Reservoir quality Diagenesis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000628819200037
WOS类目	Energy & Fuels ; Engineering, Petroleum
WOS研究方向	Energy & Fuels ; Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350962
作者单位	[Kassem, Ahmed A.; Hussein, Walid S.; Radwan, Ahmed E.; Anani, Nasr] Gulf Suez Petr Co, Explorat Dept, Cairo, Egypt; [Radwan, Ahmed E.] Jagiellonian Univ, Fac Geog & Geol, Inst Geol Sci, Gronostajowa 3a, PL-30387 Krakow, Poland; [Abioui, Mohamed] Ibn Zohr Univ, Fac Sci, Dept Earth Sci, Agadir, Morocco; [Jain, Sreepat] Adama Sci & Technol Univ, Sch Appl Nat Sci, Dept Geol, Adama, Ethiopia; [Shehata, Amer A.] Port Said Univ, Fac Sci, Geol Dept, Port Said, Egypt
推荐引用方式 GB/T 7714	Kassem, Ahmed A.,Hussein, Walid S.,Radwan, Ahmed E.,et al. Petrographic and diagenetic study of siliciclastic Jurassic sediments from the northeastern margin of Africa: Implication for reservoir quality[J],2021,200.
APA	Kassem, Ahmed A..,Hussein, Walid S..,Radwan, Ahmed E..,Anani, Nasr.,Abioui, Mohamed.,...&Shehata, Amer A..(2021).Petrographic and diagenetic study of siliciclastic Jurassic sediments from the northeastern margin of Africa: Implication for reservoir quality.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,200.
MLA	Kassem, Ahmed A.,et al."Petrographic and diagenetic study of siliciclastic Jurassic sediments from the northeastern margin of Africa: Implication for reservoir quality".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 200(2021).