Identification and distribution of fractures in the Zhangjiatan shale of the Mesozoic Yanchang Formation in Ordos Basin

doi:10.1190/INT-2016-0123.1

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院油气资源研究重点实验室

	Identification and distribution of fractures in the Zhangjiatan shale of the Mesozoic Yanchang Formation in Ordos Basin
	Shi, Hui 1; Luo, Xiaorong 1; Xu, Hui 1; Wang, Xiangzeng 2; Zhang, Lixia 2; Wang, Qingchen 1; Lei, Yuhong 1; Jiang, Chengfu 2; Cheng, Ming 1; Ma, Shan 1
刊名	INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION
	2017-05-01
卷号	5 期号:2 页码:SF167-SF176
ISSN号	2324-8858
DOI	10.1190/INT-2016-0123.1
文献子类	Article
英文摘要	The natural fractures in mud or shale directly affect the quality and efficiency of shale gas reservoirs, and fracture identification and prediction play an important role in drilling shale gas wells and making plans for reservoir stimulation. We adopted ant tracking technology for 3D poststack reflective seismic waves to identify the size and distribution of high-angle structural fractures in the Zhangjiatan shale of the Yanchang Formation in the Ordos Basin, which is a typical continental shale. The parameters for ant tracking fractures are extracted from the investigation on outcrop, cores, and image logs. The prestack seismic diffractive wave imaging technique for the super-resolution identification of mid-and small-scale breakpoints can be used as the constraint conditions for ant tracking. The identified result of high-angle fractures was validated by the image logging and drilling gas logging results. The geologic and logging data indicate that the Zhangjiatan shale is mainly characterized by high-angle fractures and a smaller number of low-angle fractures. The fractures mainly trend in the near east-west direction, followed by the near north-south direction, and a small amount of fractures in the north-northeast and northwest-west directions. The average density of structural fractures is relatively low, but the cemented rate is only 15.7%, and most structural fractures maintain an open state. The identified and predicted structural fractures are mainly distributed in the southeast of well LP180 and south of well LP179. The higher gas shows from actual well drilling in shale directly correspond to the density and intensity of high-angle fractures rather than the matrix gas abundance in shale, which indicates that the sweet spot of gas production in shale is clearly controlled by structural fractures.
WOS关键词	GULF-OF-MEXICO ; SANDSTONE RESERVOIRS ; CHINA IMPLICATIONS ; LOW-PERMEABILITY ; GAS ; STRATIGRAPHY ; MUDSTONES ; STRATA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SOC EXPLORATION GEOPHYSICISTS
WOS记录号	WOS:000404347700024
资助机构	Chinese National Natural Science Foundation(41372151 ; Yanchang Petroleum (Group) Co., Ltd.(2012KTZB03-03-01-01) ; 41102078) ; Chinese National Natural Science Foundation(41372151 ; Yanchang Petroleum (Group) Co., Ltd.(2012KTZB03-03-01-01) ; 41102078) ; Chinese National Natural Science Foundation(41372151 ; Yanchang Petroleum (Group) Co., Ltd.(2012KTZB03-03-01-01) ; 41102078) ; Chinese National Natural Science Foundation(41372151 ; Yanchang Petroleum (Group) Co., Ltd.(2012KTZB03-03-01-01) ; 41102078)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/49852]
专题	地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者	Shi, Hui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing, Peoples R China 2.Yanchang Petr Grp Co LTD, Xian, Peoples R China
推荐引用方式 GB/T 7714	Shi, Hui,Luo, Xiaorong,Xu, Hui,et al. Identification and distribution of fractures in the Zhangjiatan shale of the Mesozoic Yanchang Formation in Ordos Basin[J]. INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION,2017,5(2):SF167-SF176.
APA	Shi, Hui.,Luo, Xiaorong.,Xu, Hui.,Wang, Xiangzeng.,Zhang, Lixia.,...&Ma, Shan.(2017).Identification and distribution of fractures in the Zhangjiatan shale of the Mesozoic Yanchang Formation in Ordos Basin.INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION,5(2),SF167-SF176.
MLA	Shi, Hui,et al."Identification and distribution of fractures in the Zhangjiatan shale of the Mesozoic Yanchang Formation in Ordos Basin".INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION 5.2(2017):SF167-SF176.