干旱区生态环境知识资源中心(Arid): Organic geochemical, palynofacies, and petrographic analyses examining the hydrocarbon potential of the Kharita Formation (Albian) in the Matruh Basin, northwestern Egypt

Arid

DOI	10.1016/j.marpetgeo.2019.104087
	Organic geochemical, palynofacies, and petrographic analyses examining the hydrocarbon potential of the Kharita Formation (Albian) in the Matruh Basin, northwestern Egypt
	Deaf, Amr S.1,4; Tahoun, Sameh S.2; Gentzis, Thomas 3; Carvajal-Ortiz, Humberto 3; Harding, Ian C.4; Marshall, John E. A.4; Ocubalidet, Seare 3
通讯作者	Deaf, Amr S.
来源期刊	MARINE AND PETROLEUM GEOLOGY
ISSN	0264-8172
EISSN	1873-4073
出版年	2020
卷号	112
英文摘要	A recent study of selected samples from the Cretaceous (Albian) Kharita Formation of Egypt revealed very good to excellent source rock (SR) potential for six intraformational, organic-rich intervals. This work investigates the SR potential of the entire Kharita Formation across the Matruh Basin, using samples from two wells: the Abu Tunis 1X well from the central part of the basin, and the Siqeifa 1X well drilled on the eastern margin of the basin. More strongly reducing conditions were developed in the centre of the basin, and resulted in the deposition of more organic-rich shales by comparison to the less reducing conditions that prevailed on the eastern basin margin, where the shales contain less organic matter. Deltaic intraformational shales and carbonates in the Kharita Formation of Abu Tunis 1X constitute a significant 120 m net of the potential SR. The lower Kharita Formation contains 34 m net shale SR of good to very good/excellent organic richness, yielding values of 1.14-11.59 wt % total organic carbon (TOC). The organic matter has low Hydrogen Index (HI) values (184-389 mg HC/g TOC) and amorphous organic matter (AOM) and relatively high non-opaque phytoclast frequencies indicating mainly gas/oil-prone organofacies (kerogen Types III/II). The upper Kharita is rather important, containing 86 m net shale/carbonate SR that has fair to good organic richness (0.8-1.8 wt % TOC), and lower HI (126-250 mg HC/g TOC), a dominance of non-opaque phytoclasts, and subordinate AOM frequencies, which together indicate gas/oil-prone organofacies (kerogen III/II. In the Siqeifa 1X well, Kharita deltaic intraformational shales and shaley dolostones comprise 80 m net SR, which has mainly fair to good to less very good organic richness (0.8-2.1 wt % TOC), whilst low HI (93-220 mg HC/g TOC), dominance of nonopaque phytoclasts and subordinate AOM indicate gas-prone organofacies (kerogen Type III). A relative upward increase in deposition of lignite and coaly carbonaceous material supports a gas-prone organofacies. Whilst thermal maturity indices only point to immature to early mature (pre- to early oil-window) SRs in both the Abu Tunis 1X and Siqeifa 1X wells, hydrocarbon exploration focussing on this potential source rock may be justified in areas to the southeast of the Matruh Basin, where modelling indicates this unit may have reached the late mature oil- to main gas-generation windows.
英文关键词	Palynofacies Organic petrology Rock-Eval pyrolysis Organofacies Hydrocarbon potential Kharita Formation Matruh Basin Egypt
类型	Article
语种	英语
国家	Egypt ; USA ; England
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000509622600039
WOS关键词	NORTH-WESTERN DESERT ; SOURCE-ROCK ; SHUSHAN BASIN ; PALYNOLOGY ; GENERATION ; MATTER ; SEQUENCE ; SYSTEM ; WELL ; RECONSTRUCTION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
EI主题词	2020-02-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312751
作者单位	1.Assiut Univ, Fac Sci, Geol Dept, Assiut 71516, Egypt; 2.Cairo Univ, Geol Dept, Fac Sci, Giza 12613, Egypt; 3.Core Labs Inc, 6316 Windfern Rd, Houston, TX 77040 USA; 4.Univ Southampton, Natl Oceanog Ctr, Sch Ocean & Earth Sci, European Way, Southampton SO14 3ZH, Hants, England
推荐引用方式 GB/T 7714	Deaf, Amr S.,Tahoun, Sameh S.,Gentzis, Thomas,et al. Organic geochemical, palynofacies, and petrographic analyses examining the hydrocarbon potential of the Kharita Formation (Albian) in the Matruh Basin, northwestern Egypt[J],2020,112.
APA	Deaf, Amr S..,Tahoun, Sameh S..,Gentzis, Thomas.,Carvajal-Ortiz, Humberto.,Harding, Ian C..,...&Ocubalidet, Seare.(2020).Organic geochemical, palynofacies, and petrographic analyses examining the hydrocarbon potential of the Kharita Formation (Albian) in the Matruh Basin, northwestern Egypt.MARINE AND PETROLEUM GEOLOGY,112.
MLA	Deaf, Amr S.,et al."Organic geochemical, palynofacies, and petrographic analyses examining the hydrocarbon potential of the Kharita Formation (Albian) in the Matruh Basin, northwestern Egypt".MARINE AND PETROLEUM GEOLOGY 112(2020).