国家冰川冻土沙漠科学数据中心

元数据

名称	New insights into the carbonate karstic fault system and reservoir formation in the Southern Tahe area of the Tarim Basin
科技资源标识	CSTR:11738.14.NCDC.XDA14.PP4328.2024
DOI	https://doi.org/10.1016/j.marpetgeo.2017.06.023
数据共享方式	开放下载
摘要	As worldwide hydrocarbon exploration has extended from shallowly to deeply buried strata, reservoir quality has attracted substantial and persistent interest in petroleum geology. In particular, deeply buried strata (>5500 m) in the Tarim Basin have attracted considerable attention because carbonate reservoirs that have experienced fracture or dissolution have also been shown to demonstrate considerable hy_x0002_drocarbon potential. Therefore, it is necessary to determine how these reservoirs are developed and distributed in detail from both scientific and practical standpoints. In this paper, we address this issue using a case study in the southern Tahe area, which is contained within the largest Palaeozoic marine oilfield in China. In the northern Tahe area, mega-paleokarst systems developed in the Ordovician strata; however, the reservoir quality in the southern part of the Tahe area is relatively poor because it is covered by insoluble formations during karstification. Observations of cores and analyses of images of well logging demonstrate that these reservoirs are dominated by caves, vugs and fractures that have developed near faults. We speculate that the faults penetrating insoluble formations represent the main dissolution passages that originally developed these karstic fault systems. Additionally, we analyse a series of outcrops, seismic data, and structures to characterize the spatial geometry of these major faults and their surrounding fractures in detail. Most of these are strike-slip faults, and their subsequent reservoirs can be divided into three categories based on their development, including dendritic, sandwich and slab reservoirs. Recent studies demonstrate that karstic fault reservoirs are most common traps in the study area. Although various types of carbonate karstic fault reservoirs are represented in this region, the dendritic karstic fault reservoir is the most hydrocarbonrich. Guided by these initial results, 108 wells were drilled from 2013 to 2014, producing 485 thousand tons of oil and yielding success ratios greater than 89%. The average production of dendritic reservoirs is 37.4 tons per day (t/d), while those of sandwich and slab types are 20.2 t/d and 14.0 t/d, respectively. These results represent significant references for future hydrocarbon exploration and the development of similar deeply buried karstic fault reservoirs in the Tarim Basin and elsewhere.
学科分类	170.20
关键词	Karstic fault system Fault damage zones Paleokarst reservoir Reservoir types Tarim basin
作者	Xinbian Lu,Yan Wang,Fei Tian
数据量	12.1 MiB
论文类型：	journal
论文网址：	https://linkinghub.elsevier.com/retrieve/pii/S0264817217302301
期刊名称：	Marine and Petroleum Geology
出版时间：	2017-09-01

引用和标注

数据引用

Xinbian Lu,Yan Wang,Fei Tian. New insights into the carbonate karstic fault system and reservoir formation in the Southern Tahe area of the Tarim Basin. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.14.NCDC.XDA14.PP4328.2024.

许可协议

本作品采用知识共享署名 4.0 国际许可协议进行许可。

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项目信息详情

项目名称：超深层导向钻井关键技术
项目编号：XDA14040000
项目类别：中国科学院战略性先导科技专项（A类）