Densification and hydrocarbon accumulation of Triassic Yanchang Formation Chang 8 Member, Ordos Basin, NW China: Evidence from geochemistry and fluid inclusions

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	Densification and hydrocarbon accumulation of Triassic Yanchang Formation Chang 8 Member, Ordos Basin, NW China: Evidence from geochemistry and fluid inclusions
	Fu Jinhua 1,2; Deng Xiuqin 1,2; Wang Qi 3; Li Jihong 1,2; Qiu Junli 3; Hao Lewei 3; Zhao Yande 1,2
刊名	PETROLEUM EXPLORATION AND DEVELOPMENT
	2017-02-01
卷号	44 期号:1 页码:48-57
关键词	Ordos Basin Triassic Yanchang Formation Hydrocarbon Occurrence Charge Period Major Reservoir Forming Phase Tight Reservoir
ISSN号	1000-0747
文献子类	Article
英文摘要	Crushing, acid treatment and step wise separation and oil extraction were employed to obtain the different occurrence state hydrocarbons. All these fractions have been analyzed by Gas Chromatography-Mass Spectrometer (GC-MS). The fractions relationship and related oil charging process can be mirrored through the analysis of fractions weight content and geochemical characteristics, in combination with the research of inclusions homogenization temperature and fluorescence spectrum parameters. Experimental results reveal that there are four state hydrocarbons, i. e. free hydrocarbon, sealed hydrocarbon, hydrocarbon in carbonate cement, and hydrocarbon within inclusions caught by quartz grains and feldspar grains in the oil-rich sandstones of Chang8 Member, Triassic Yanchang Formation in the Ordos Basin. Among them, the overwhelming fraction is the free hydrocarbon, averaged 93.4%. Fluorescence spectrum parameters of lambda(max), QF(535) and Q(650/500) show that the crude oil maturity of the inclusions imprisoned in feldspar, quartz, and carbonate cement increase in turn, and the parameter values of the inclusions in feldspar and quartz are similar and much different from those of carbonate cement. Through analysis of C-29 beta beta/(alpha alpha+ beta beta) and C(29)20S/(20S+ 20R), together with methylphenanthrene ratio, it is revealed that thermal- evolutionary degree of the hydrocarbon within inclusions, hydrocarbon in carbonate cement, sealed hydrocarbon, free hydrocarbon reflects an upward trend, and the data of the last two type are similar. Integrated study of diagenetic sequence and thermal evolutionary degree suggest that the Chang 8 sandstones had been compacted before reservoir formation and the reservoirs have experienced three phase of charge events in which the third one played the most important role for reservoir formation.
WOS关键词	FLUORESCENCE ; MIGRATION ; PETROLEUM ; OIL
WOS研究方向	Energy & Fuels ; Engineering ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000397006900006
资助机构	China National Science and Technology Major Project(2016ZX05050 ; 2011ZX05001-004) ; China National Science and Technology Major Project(2016ZX05050 ; 2011ZX05001-004) ; China National Science and Technology Major Project(2016ZX05050 ; 2011ZX05001-004) ; China National Science and Technology Major Project(2016ZX05050 ; 2011ZX05001-004)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53050]
专题	地质与地球物理研究所_兰州油气中心
通讯作者	Fu Jinhua
作者单位	1.Natl Engn Lab Explorat & Dev Low Permeabil Oil &, Xian 710018, Peoples R China 2.PetroChina Changqing Oil Field Co, Xian 710018, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Fu Jinhua,Deng Xiuqin,Wang Qi,et al. Densification and hydrocarbon accumulation of Triassic Yanchang Formation Chang 8 Member, Ordos Basin, NW China: Evidence from geochemistry and fluid inclusions[J]. PETROLEUM EXPLORATION AND DEVELOPMENT,2017,44(1):48-57.
APA	Fu Jinhua.,Deng Xiuqin.,Wang Qi.,Li Jihong.,Qiu Junli.,...&Zhao Yande.(2017).Densification and hydrocarbon accumulation of Triassic Yanchang Formation Chang 8 Member, Ordos Basin, NW China: Evidence from geochemistry and fluid inclusions.PETROLEUM EXPLORATION AND DEVELOPMENT,44(1),48-57.
MLA	Fu Jinhua,et al."Densification and hydrocarbon accumulation of Triassic Yanchang Formation Chang 8 Member, Ordos Basin, NW China: Evidence from geochemistry and fluid inclusions".PETROLEUM EXPLORATION AND DEVELOPMENT 44.1(2017):48-57.