干旱区生态环境知识资源中心(Arid): Organic facies and hydrocarbon potential of the early-middle Albian Kharita Formation in the Abu Gharadig Basin, Egypt, as demonstrated by palynology, organic petrology, and geochemistry

Arid

DOI	10.1016/j.coal.2019.05.002
	Organic facies and hydrocarbon potential of the early-middle Albian Kharita Formation in the Abu Gharadig Basin, Egypt, as demonstrated by palynology, organic petrology, and geochemistry
	Gentzis, Thomas 1; Carvajal-Ortiz, Humberto 1; Tahoun, Sameh S.2; Deaf, Amr 3; Ocubalidet, Seare 1
通讯作者	Gentzis, Thomas
来源期刊	INTERNATIONAL JOURNAL OF COAL GEOLOGY
ISSN	0166-5162
EISSN	1872-7840
出版年	2019
卷号	209 页码:27-39
英文摘要	During the past decades, exploration activities carried out in the Western Desert of Egypt by several oil companies revealed the oversimplified approach to the study of sedimentary basins in this region. The current study evaluates and discusses the palynology and palynofacies of the elastic succession of the Kharita Formation (Albian) in one of the most petroliferous, deep seated, fault controlled basins in the Western Desert of Egypt, the Abu Gharadig Basin. Although the focus is on the palynofacies association, the hydrocarbon potential of the Kharita Formation will also be addressed by means of organic petrology and Rock-Eval pyrolysis. Marine Cretaceous source rocks have generated substantial quantities of oil and gas in the Abu Gharadig rift Basin. Moreover, Abu Gharadig Basin is characterized by containing not only oil/gas generating source rocks but also reservoir rocks with appreciable porosities and permeabilities. Palynological, TOC/Rock-Eval pyrolysis, and vitrinite reflectance (VRo%) data from 26 cuttings samples recovered from the Kharita Formation in the BED 2-1 x well, are presented. The palynological age dating (AL-2 Palynozone) confirmed early to middle Albian age based on the first downhole appearance of the marker Concavisimisporites punctatus. The optical and visual characterization of the palynofacies associations showed two distinct palynofacies associations that alternated with each other. Kerogen type III to III/II was recorded based on the dominance of phytoclasts and opaque organics. Some intervals showed a slight dominance of amorphous organic matter (AOM). Thermal Alteration Index (TAI) values of 2 + /3-measured on the psilate trilete spores, in combination with vitrinite reflectance (VRo) values in the range from 0.51 to 0.62%, and the yellow to dull-yellow colors of the liptinite macerals exhibited under UV light excitation indicate immature to the early stage of the oil window. Tmax values from Rock-Eval pyrolysis range from 426 to 438 degrees C also confirm the low maturity of the organic matter. Thin coal stringers were recorded within the Kharita Formation having slightly higher VRo,ran values (0.64 to 0.76%), which is possibly the result of differences in mineral matrix variations within the Kharita Formation. Based on the low TOC (avg. 0.71 wt%), S-2 (avg. 0.97 mg HC/g rock), and HI (avg. 149 mg HC/g TOC) values from pyrolysis, the hydrocarbon potential of the Kharita Formation in the studied well is considered to be low.
英文关键词	Palynofacies Organic petrology Rock-Eval pyrolysis Hydrocarbon evaluation Kharita Formation Abu Gharadig Basin Egypt
类型	Article ; Proceedings Paper
语种	英语
国家	USA ; Egypt
收录类别	SCI-E
WOS记录号	WOS:000470944700003
WOS关键词	NORTH-WESTERN DESERT ; SEA-LEVEL CHANGES ; OIL-FIELD ; PALYNOFACIES ; WELL ; SUCCESSION ; STRATIGRAPHY ; POLLEN ; SPORES
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/2XILL650/216394
作者单位	1.Core Labs Inc, 6316 Windfern Rd, Houston, TX 77040 USA; 2.Cairo Univ, Fac Sci, Dept Geol, Giza 12613, Egypt; 3.Assiut Univ, Fac Sci, Dept Geol, Assiut 71516, Egypt
推荐引用方式 GB/T 7714	Gentzis, Thomas,Carvajal-Ortiz, Humberto,Tahoun, Sameh S.,et al. Organic facies and hydrocarbon potential of the early-middle Albian Kharita Formation in the Abu Gharadig Basin, Egypt, as demonstrated by palynology, organic petrology, and geochemistry[J],2019,209:27-39.
APA	Gentzis, Thomas,Carvajal-Ortiz, Humberto,Tahoun, Sameh S.,Deaf, Amr,&Ocubalidet, Seare.(2019).Organic facies and hydrocarbon potential of the early-middle Albian Kharita Formation in the Abu Gharadig Basin, Egypt, as demonstrated by palynology, organic petrology, and geochemistry.INTERNATIONAL JOURNAL OF COAL GEOLOGY,209,27-39.
MLA	Gentzis, Thomas,et al."Organic facies and hydrocarbon potential of the early-middle Albian Kharita Formation in the Abu Gharadig Basin, Egypt, as demonstrated by palynology, organic petrology, and geochemistry".INTERNATIONAL JOURNAL OF COAL GEOLOGY 209(2019):27-39.