气候变化领域集成服务门户(CCPortal): Mechanism of hydrocarbon accumulation and enrichment of tuffaceous tight oil with separate reservoir and source rock: A case study of tuff reservoir from the Permian Tiaohu Formation in the Santanghu Basin, northwest China

CCPortal

DOI	10.1306/07031817108
	Mechanism of hydrocarbon accumulation and enrichment of tuffaceous tight oil with separate reservoir and source rock: A case study of tuff reservoir from the Permian Tiaohu Formation in the Santanghu Basin, northwest China
	Ma J.; Huang Z.; Li T.
发表日期	2019
ISSN	0149-1423
卷号	103 期号:2
英文摘要	Different from most tight oil reservoirs, the tuffaceous tight oil of the Tiaohu Formation is not in situ oil, and no close contact exists between the source rock and reservoir in the Malang sag (Santanghu Basin, China). This study determined the mechanism of hydrocarbon accumulation of this tuffaceous tight oil reservoir through an integrated analysis of oil-source rock correlation, reservoir characteristics, and rock wettability combined with a comprehensive analysis of geological conditions. An oil-source rock correlation using biomarkers and stable carbon isotopes shows that the crude oil originated from underlying source rocks in the Lucaogou Formation. The oil in the tuffaceous tight reservoir is not indigenous but hasmigrated over a long distance to accumulate in these reservoirs. Faults and fractures that developed at the end of the Cretaceous are the oil migration pathways. Vitric and crystal-vitric tuffs constitute the main rock types of the tuffaceous tight reservoir. Matrix-related pores in the tuffs mainly comprise interparticle pores between minerals and dissolution intraparticle pores formed by devitrification. The adsorption of polar components of the oil generated from original organic matter in the tuff leads to wettabilityof lipophilicity, which is the main reason for hydrocarbon charging and accumulation. To our knowledge, this is the first comprehensive study reporting this finding. © 2019. The American Association of Petroleum Geologists.
语种	英语
scopus关键词	Crude oil; Hydrocarbons; Petroleum reservoirs; Rocks; Source separation; Comprehensive analysis; Geological conditions; Hydrocarbon accumulation; Integrated analysis; Oil migration pathways; Oil-source rock correlation; Reservoir characteristic; Stable carbon isotopes; Petroleum reservoir engineering; adsorption; Cretaceous; crude oil; dissolution; hydrocarbon; hydrocarbon reservoir; organic matter; Permian; source rock; tuff; wettability; China; Santanghu Basin; Xinjiang Uygur
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/125036
作者单位	State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, China
推荐引用方式 GB/T 7714	Ma J.,Huang Z.,Li T.. Mechanism of hydrocarbon accumulation and enrichment of tuffaceous tight oil with separate reservoir and source rock: A case study of tuff reservoir from the Permian Tiaohu Formation in the Santanghu Basin, northwest China[J],2019,103(2).
APA	Ma J.,Huang Z.,&Li T..(2019).Mechanism of hydrocarbon accumulation and enrichment of tuffaceous tight oil with separate reservoir and source rock: A case study of tuff reservoir from the Permian Tiaohu Formation in the Santanghu Basin, northwest China.AAPG Bulletin,103(2).
MLA	Ma J.,et al."Mechanism of hydrocarbon accumulation and enrichment of tuffaceous tight oil with separate reservoir and source rock: A case study of tuff reservoir from the Permian Tiaohu Formation in the Santanghu Basin, northwest China".AAPG Bulletin 103.2(2019).