干旱区生态环境知识资源中心(Arid): Differential enrichment mechanism of organic matters in the marine-continental transitional shale in northeastern Ordos Basin, China: Control of sedimentary environments

Arid

DOI	10.1016/j.jngse.2020.103625
	Differential enrichment mechanism of organic matters in the marine-continental transitional shale in northeastern Ordos Basin, China: Control of sedimentary environments
	Chen, Yuhang; Wang, Yingbin; Guo, Mingqiang; Wu, Heyuan; Li, Jun; Wu, Weitao; Zhao, Jingzhou
通讯作者	Chen, YH ; Zhao, JZ
来源期刊	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
ISSN	1875-5100
EISSN	2212-3865
出版年	2020
卷号	83
英文摘要	The organic-rich shales deposited in marine-continental transitional environments are well developed in China. Previous studies mainly focused on the petrology and geochemical characteristics of the transitional shale. However, the factor controlling organic matter (OM) enrichment in the shale has not been studied adequately, limiting the optimal reservoir selection in shale gas exploration. Based on laboratory analyses and field investigations, this paper documents the geochemical features of the transitional shales in Upper Paleozoic (the Benxi, Taiyuan and Shanxi Formations) of the northeastern Ordos Basin, China. The sedimentary environment evolution and the relevant influence on OM enrichment are discussed to reveal the factor controlling the interlayer difference of the OM enrichment in the shale. The results show that the shale in the Taiyuan Formation hosts the highest OM content in the Upper Paleozoic. The sedimentary setting of the study area transited from barrier-flats to fluvial deltas, accompanied by gradually arid climates, decreasing degree of reduction and salinity of waters, and increasing clastic influx. During the middle stage of the marine-continental transition (the depositional stage of the Taiyuan Formation), the warm and humid climate was beneficial to the OM production, and the anoxic condition was conducive to the OM preservation. In addition, the increasing clastic influx ensured the OM input, and the moderate depositional rate favored the OM preservation. All the factors above commonly established an excellent environment for the OM enrichment. Our results reveal the OM enrichment mechanism in transitional shales, which is helpful to the optimal reservoir selection in the shale gas exploration in the Ordos Basin as well as the similar basins.
英文关键词	Transitional shales Organic matter enrichment Paleoenvironments clastic influx Ordos Basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000581887900087
WOS关键词	SOUTHERN SICHUAN BASIN ; RARE-EARTH-ELEMENTS ; TECTONIC SETTING DISCRIMINATION ; CARBONIFEROUS-PERMIAN STRATA ; SILURIAN LONGMAXI FORMATION ; TRIASSIC YANCHANG FORMATION ; CHANG 7 MEMBER ; GEOCHEMICAL CHARACTERISTICS ; BLACK SHALES ; LINXING AREA
WOS类目	Energy & Fuels ; Engineering, Chemical
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/2XILL650/327095
作者单位	[Chen, Yuhang; Wu, Heyuan; Li, Jun; Wu, Weitao; Zhao, Jingzhou] Xian Shiyou Univ, Sch Earth Sci & Engn, Xian 710065, Shaanxi, Peoples R China; [Chen, Yuhang] Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China; [Chen, Yuhang] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China; [Chen, Yuhang; Zhao, Jingzhou] Xian Shiyou Univ, Shaanxi Key Lab Petr Accumulat Geol, Xian 710065, Peoples R China; [Wang, Yingbin; Guo, Mingqiang] CNOOC Ltd, Unconvent Oil & Gas Branch, Beijing 100011, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yuhang,Wang, Yingbin,Guo, Mingqiang,et al. Differential enrichment mechanism of organic matters in the marine-continental transitional shale in northeastern Ordos Basin, China: Control of sedimentary environments[J],2020,83.
APA	Chen, Yuhang.,Wang, Yingbin.,Guo, Mingqiang.,Wu, Heyuan.,Li, Jun.,...&Zhao, Jingzhou.(2020).Differential enrichment mechanism of organic matters in the marine-continental transitional shale in northeastern Ordos Basin, China: Control of sedimentary environments.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,83.
MLA	Chen, Yuhang,et al."Differential enrichment mechanism of organic matters in the marine-continental transitional shale in northeastern Ordos Basin, China: Control of sedimentary environments".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 83(2020).