| DOI: | 10.1306/04181211178
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| Scopus记录号: | 2-s2.0-84869400977
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| 论文题名: | Organic geochemical characteristics and interpreted depositional environment of the Khatatba Formation, northern Western Desert, Egypt |
| 作者: | Shalaby M.R.; Hakimi M.H.; Abdullah W.H.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1725
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| EISSN: | 1558-9455
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| 出版年: | 2012
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| 发表日期: | 2012
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| 卷: | 96, 期:11 | | 起始页码: | 2019
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| 结束页码: | 2036
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| 语种: | 英语
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| Scopus关键词: | Biomarker distributions
; Depositional environment
; Geochemical characteristic
; Hydrogen indices
; Middle Jurassic
; Mixed type
; Organic carbon contents
; Organic-rich sediment
; Pristane
; Rock-Eval pyrolysis
; Source rocks
; Spectrometry technique
; Steranes
; Terpanes
; Thermal maturity
; Total Organic Carbon
; Vitrinite reflectance
; Western Desert
; Western Desert , Egypt
; Biomarkers
; Gas chromatography
; Gas condensates
; Geochemistry
; Hydrogen
; Mass spectrometry
; Organic carbon
; Paraffins
; Petroleum industry
; Shale
; biomarker
; depositional environment
; gas chromatography
; marine environment
; mass spectrometry
; organic matter
; petrology
; reflectance
; shale
; source rock
; suboxic conditions
; thermal maturity
; Egypt
; Western Desert
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | The Middle Jurassic Khatatba Formation in the northern Western Desert of Egypt was evaluated in terms of organic matter abundance, type and thermal maturity, as well as for some organic pétrographie characteristics. Depositional environments were interpreted based on organic geochemical (Rock-Eval pyrolysis, extract analysis, and biomarker distributions) and organic petrological methods. Organic carbon contents range between 1.0 and 32.5 wt. %. The Khatatba shale and coaly shale samples have hydrogen index values in the range of 63 to 261 mg hydrocarbon (HC)/g total organic carbon, with mixed types 2-3 and 3 kerogens. Mean vitrinite reflectance (Ro) between 0.77 and 1.07% is in reasonably good agreement with pyrolysis Tmax (temperature at maximum of S2 peak) data (438-459°C). Organic-rich sediments of the Middle Jurassic Khatatba Formation have very good source rock generative potential and have obtained thermal maturity levels equivalent to the oil window. The main generation products are gas with very limited liquid HCs (oil or condensate). Seven shale and coaly shale samples from Khatatba Formation were characterized using gas chromatography (GC) and GC-mass spectrometry techniques. The Khatatba samples are characterized by the predominance of C14C24 alkanes a pristane/phytane ratio of less than 2 abundant C27 regular steranes and the presence of tricyclic terpanes. These are consistent with the suboxic marine-environment conditions for the Khatatba source rock. Biomarker parameters for these samples generally indicate a mixture of land- as well as marine-derived organic-matter input. The maturity indicators based on C32 22S/ (22S + 22R) homohopane and C29 20S/(20S + 20R) and β/β + α) sterane ratios reveal that the Khatatba samples are thermally mature and have reached the peak oil-window maturity supporting the RO data. Copyright ©2012. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84869400977&doi=10.1306%2f04181211178&partnerID=40&md5=28f15c8c60764c968bbf2abba88812db
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/13295
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| Recommended Citation: | |
Shalaby M.R.,Hakimi M.H.,Abdullah W.H.. Organic geochemical characteristics and interpreted depositional environment of the Khatatba Formation, northern Western Desert, Egypt[J]. AAPG Bulletin,2012-01-01,96(11)
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