气候变化领域集成服务门户(CCPortal): Hydrocarbon migration in the multiple-sourced petroleum system in the northwestern Junggar Basin (northwestern China): Constraint from geochemical and phase fractionation analysis

CCPortal

DOI	10.1306/01211916512
	Hydrocarbon migration in the multiple-sourced petroleum system in the northwestern Junggar Basin (northwestern China): Constraint from geochemical and phase fractionation analysis
	Wang A.; Wang Z.; Li L.; Fan C.; Zhang K.; Xiang B.; Zhou N.; Wang Y.
发表日期	2019
ISSN	0149-1423
卷号	103 期号:9
英文摘要	Oil mixing and absence of source-rock samples make it difficult to identify the hydrocarbon migration routes in a petroleum system. We provide a case study in the northwestern Junggar Basin to show that combined geochemical and phase fractionation analyses are robust tools to unravel the complex hydrocarbon migration processes. The study rebuilds a migration history that multiple-sourced hydrocarbons migrated, mixed, accumulated, and fractionated along the evolution of regional tectonics. In detail, the Shawan and Mahu sags expelled the early-stage hydrocarbons during the Late Triassic and Late Jurassic, respectively, because of their variable subsidence. These hydrocarbons charged the entire area based on the evidence from bitumen and oil inclusions. During the Early Cretaceous, both sags subsided rapidly and expelled their late-stage hydrocarbons. These hydrocarbons first mixed along unconformities in the sags, which generated mixed-source oils and induced gas washing. Subsequently, they further mixed with or displaced the encountered early-stage oils during migration along the basal unconformity of the upper Permian into the area, causing a horizontal distribution of oil maturity zones. In addition, gases flowing through the early-stage oils induced gas washing again, creating heavy oils, condensate oils, and mixed gases. After the late-stage oils finally accumulated in fractured volcanics, migration fractionation caused the remigration of light-end compositions. This study also shows the strong control of structures on hydrocarbon migration: the unconformity network provided opportunities for long-distance migration and widespread mixing of multiple-sourced hydrocarbons, whereas the paleoridge line of the Zhongguai high defined the boundary of regional migration. Copyright © 2019. The American Association of Petroleum Geologists. All rights reserved.
语种	英语
scopus关键词	Analytical geochemistry; Crude oil; Gas oils; Gasoline; Heavy oil production; Landforms; Mixing; Petroleum analysis; Petroleum geology; Washing; Control of structure; Fractionation analysis; Horizontal distribution; Hydrocarbon migration; Migration history; Northwestern China; Petroleum systems; Regional tectonics; Hydrocarbons; bitumen; displacement; fractionation; geochemistry; hydrocarbon migration; hydrocarbon reservoir; inclusion; petroleum; source rock; subsidence; unconformity; China; Junggar 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/125048
作者单位	State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an, Shaanxi, China; Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada; Department of Geology, Northwest University, Xi’an, Shaanxi, China; Research Institute of Experiment and Testing, Xinjiang Oilfield Company, Karamay, Xinjiang, China
推荐引用方式 GB/T 7714	Wang A.,Wang Z.,Li L.,et al. Hydrocarbon migration in the multiple-sourced petroleum system in the northwestern Junggar Basin (northwestern China): Constraint from geochemical and phase fractionation analysis[J],2019,103(9).
APA	Wang A..,Wang Z..,Li L..,Fan C..,Zhang K..,...&Wang Y..(2019).Hydrocarbon migration in the multiple-sourced petroleum system in the northwestern Junggar Basin (northwestern China): Constraint from geochemical and phase fractionation analysis.AAPG Bulletin,103(9).
MLA	Wang A.,et al."Hydrocarbon migration in the multiple-sourced petroleum system in the northwestern Junggar Basin (northwestern China): Constraint from geochemical and phase fractionation analysis".AAPG Bulletin 103.9(2019).