气候变化领域集成服务门户(CCPortal): Open shear fractures at depth in anticlines: insights from the Kuqa foreland thrust belt; Tarim Basin

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DOI	10.1007/s00531-019-01758-y
	Open shear fractures at depth in anticlines: insights from the Kuqa foreland thrust belt; Tarim Basin
	Wang Z.; Lv X.; Li Y.; Qian W.; Hu S.; Zhou X.; Quan H.
发表日期	2019
ISSN	14373254
起始页码	2233
结束页码	2245
卷号	108 期号:7
英文摘要	Shear fractures that close under compressive stress regime were described by previous workers. Here, we show the existence of hinge-parallel shear-opening mode fractures at a certain depth within an anticline structure, through core observations, Formation Micro Imager (FMI) log interpretations and production data. Studied reservoir is a tight sandstone body of Cretaceous age, which is emplaced in KS2 Anticline, with depth ranging between 6000 and 8100 m. We explore the mechanism of hinge-parallel shear fractures by stereographic technique and backtilting, as well as show field evidences for opening displacements. These shear fractures mainly consist of vertical tension set, moderate-dipping shear set, steeply dipping shear set and sub-horizontal shear set. Crosscutting relationships and surface textures suggest that although the moderate-dipping shear set is older and maybe sealed by cements, it may have been opened by local stress due to outer-arc extension through folding. Calcite bridges with rhombohedral structures may support fracture walls helping them to remain open in case of compressive stress. Our work documents shear fracture openings in the anticline at depth, and fluid flow in subsurface reservoirs. © 2019, Geologische Vereinigung e.V. (GV).
英文关键词	Fractured reservoir; Open fractures; Tarim Basin; Thrust belt; Ultra-deep formation
语种	英语
scopus关键词	anticline; basin evolution; belt; Cretaceous; displacement; fracture; hydrocarbon reservoir; image analysis; sandstone; China; Tarim Basin; Xinjiang Uygur
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147787
作者单位	State Key Laboratory of Petroleum Resource and Prospecting, College of Geoscience, China University of Petroleum, Beijing, China; Beijing Key Lab of Data Mining for Petroleum Data, China University of Petroleum, Beijing, China
推荐引用方式 GB/T 7714	Wang Z.,Lv X.,Li Y.,et al. Open shear fractures at depth in anticlines: insights from the Kuqa foreland thrust belt; Tarim Basin[J],2019,108(7).
APA	Wang Z..,Lv X..,Li Y..,Qian W..,Hu S..,...&Quan H..(2019).Open shear fractures at depth in anticlines: insights from the Kuqa foreland thrust belt; Tarim Basin.International Journal of Earth Sciences,108(7).
MLA	Wang Z.,et al."Open shear fractures at depth in anticlines: insights from the Kuqa foreland thrust belt; Tarim Basin".International Journal of Earth Sciences 108.7(2019).