Early diagenesis in high-frequency sequence framework of the Upper Ordovician carbonate platform in Tazhong, Tarim Basin and its influence on reservoir distribution

	Early diagenesis in high-frequency sequence framework of the Upper Ordovician carbonate platform in Tazhong, Tarim Basin and its influence on reservoir distribution
	Liu JiaQing1 ; Li Thong 1; Han YinXue 1; Peng ShouTao 2
刊名	ACTA PETROLOGICA SINICA
	2010-12-01
卷号	26 期号:12 页码:3629-3640
关键词	High-frequency Sedimentary Sequence Freshwater Lens Early Diagenesis Carbonate Tazhong Tarim Basin
ISSN号	1000-0569
文献子类	Article
英文摘要	The Lianglitag Formation carbonate of the Upper Ordovician is an important oil and gas reservoir in Tazhong, Tarim Basin. Based on the petrography, microfacies and logs analysis, 5 fourth-order sequences and 15 fifth-order sequences are recognized in the Lianglitag Formation carbonate, and a stratigraphic framework of high-frequency sequences has been established. The phenomenon that evidently selective dissolution, meteoric cements such as meniscus cement and pendent cement are found, and dissolved pore walls show dark cathodoluminescence, the intraparticle and interparticle cement with low Fe and Mn value, combined with the carbon and oxygen isotopic composition of sparry grainstone are close to the micrite, demonstrated that the early meteoric dissolution and early marine cement are widely developed in No. 1 fault zone, Tazhong area. Comparative analysis shows the freshwater lens developed at the top of shallowing upward high-frequency cycles, that is, the formation and distribution of early diagenesis were controlled by the framework of high-frequency sequences. The reserved porosity resulted from early diagenetic dissolution can up to 4%similar to 5% today, therefore the development of early dissolved pores provides space and conditions for fluid activity during the further late burial dissolution, leading to important constraints on the development of effective reservoir. An integrated analysis shows that TZ54-TZ826 and TZ72-TZ62-TZ24 high-steep platform margins along No. 1 faulted slope break belt in Central Tarim Basin, where early dissolved pores developed, were apt to favorable reservoirs.
WOS关键词	SEA-LEVEL CHANGES ; NE SPAIN ; EVOLUTION ; SEAWATER ; CHINA ; SR-87/SR-86 ; DELTA-C-13 ; FACIES ; OXYGEN ; VEINS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000286452000014
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73346]
专题	中国科学院地质与地球物理研究所
通讯作者	Liu JiaQing
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Sinopec Explorat & Prod Res Inst, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Liu JiaQing,Li Thong,Han YinXue,et al. Early diagenesis in high-frequency sequence framework of the Upper Ordovician carbonate platform in Tazhong, Tarim Basin and its influence on reservoir distribution[J]. ACTA PETROLOGICA SINICA,2010,26(12):3629-3640.
APA	Liu JiaQing,Li Thong,Han YinXue,&Peng ShouTao.(2010).Early diagenesis in high-frequency sequence framework of the Upper Ordovician carbonate platform in Tazhong, Tarim Basin and its influence on reservoir distribution.ACTA PETROLOGICA SINICA,26(12),3629-3640.
MLA	Liu JiaQing,et al."Early diagenesis in high-frequency sequence framework of the Upper Ordovician carbonate platform in Tazhong, Tarim Basin and its influence on reservoir distribution".ACTA PETROLOGICA SINICA 26.12(2010):3629-3640.