气候变化领域集成服务门户(CCPortal): Natural fractures in tight gas volcanic reservoirs and their influences on production in the Xujiaweizi depression; Songliao Basin; China

CCPortal

DOI	10.1306/05122017169
	Natural fractures in tight gas volcanic reservoirs and their influences on production in the Xujiaweizi depression; Songliao Basin; China
	Liu G.; Zeng L.; Sun G.; Zu K.; Qin L.; Mao Z.; Ostadhassan M.
发表日期	2020
ISSN	0149-1423
起始页码	2099
结束页码	2123
卷号	104 期号:10
英文摘要	Lower Cretaceous volcanic rocks that contain major natural fractures are the main natural gas reservoirs in the deep Xujiaweizi depression of the northern Songliao Basin in China. Natural fractures are mainly tectonic fractures, in addition to some shrinkage, dissolution, and cryptoexplosive fractures. Analyzing various sources of data revealed that fractures are generally better developed in the rhyolites and trachytes of the crater and near-crater group. Also, tectonic fractures are developed to a higher degree in the hanging wall of faults, with the degree of development decreasing with increasing distance from the fault planes. More than 85% of these fractures are found to be unfilled and, when connected by pores, provide the main effective storage volume for these volcanic reservoirs (up to ~75%). Natural gas production is closely related to the linear density (P10) of unfilled tectonic fractures and the angle between the orientation of unfilled tectonic fracture and the corresponding direction of the maximum horizontal stress component. The results show that natural gas production is elevated when the average P10 exceeds 2 m-1, and the average included angle is less than 30°. Finally, it was concluded that within the study area, unfilled tectonic fractures of near east-west strikes, which have smaller included angles (<30°) with respect to the maximum horizontal stress direction, are under minimal compressive stresses and make the best fluid-flow pathways in the reservoir. Copyright © 2020. The American Association of Petroleum Geologists. All rights reserved.
英文关键词	Digital storage; Faulting; Flow of fluids; Gas industry; Natural gas; Natural gas well production; Petroleum reservoirs; Tight gas; Volcanic rocks; Volcanoes; Fluid-flow pathways; Horizontal stress; Lower Cretaceous; Natural fracture; Natural gas reservoir; Natural-gas production; Tectonic fractures; Volcanic reservoirs; Fracture; crater; Cretaceous; fluid flow; fracture; gas production; hanging wall; hydrocarbon reservoir; natural gas; volcanic rock; China; Heilongjiang; Songliao Basin; Xujiaweizi; Trachytes
语种	英语
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/168691
作者单位	State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing, China; Daqing Oilfield of China National Petroleum Corporation, Daqing, China; Research Institute of Petroleum Exploration and Development, Zhongyuan Oilfield Company, Sinopec, Puyang, China; Department of Petroleum Engineering, College of Engineering and Mines, University of North Dakota, Grand Forks, ND, United States
推荐引用方式 GB/T 7714	Liu G.,Zeng L.,Sun G.,et al. Natural fractures in tight gas volcanic reservoirs and their influences on production in the Xujiaweizi depression; Songliao Basin; China[J],2020,104(10).
APA	Liu G..,Zeng L..,Sun G..,Zu K..,Qin L..,...&Ostadhassan M..(2020).Natural fractures in tight gas volcanic reservoirs and their influences on production in the Xujiaweizi depression; Songliao Basin; China.AAPG Bulletin,104(10).
MLA	Liu G.,et al."Natural fractures in tight gas volcanic reservoirs and their influences on production in the Xujiaweizi depression; Songliao Basin; China".AAPG Bulletin 104.10(2020).