收稿日期: 2008-11-30
修回日期: 2009-04-02
网络出版日期: 2009-06-10
Hierarchical Structure of Barrier beds and Interbeds in Braided River Reservoirs
Received date: 2008-11-30
Revised date: 2009-04-02
Online published: 2009-06-10
王改云, 杨少春, 廖飞燕, 武群虎 . 辫状河储层中隔夹层的层次结构分析[J]. 天然气地球科学, 2009 , 20(3) : 378 -383 . DOI: 10.11764/j.issn.1672-1926.2009.03.378
With the third member of Dongying Formation of Block 3 in Shengtuo oilfield as an example, the hierarchical structure of barrier beds and interbeds in braided river reservoirs are studied. In the phase of fine reservoir description, the barrier beds and interbeds have four hierarchies, including the barrier beds between sand groups, between subzones, between single sand beds, and the interbeds in single sand beds. There are many differences in rock types, development degree, thickness and characteristic in different scales barrier beds and interbeds, which cause different distributions of remaining oil. The barrier beds between sand groups are widely distributed in all the area, and can completely shut off hydrocarbon zone. The barrier beds between single sands have poor stability, and there are many belts of sand body connection in plan, which easily cause crossflow and enhance the vertical heterogeneity. The characteristics of barrier beds between subzones are between these two barrier beds. The interbeds in single sand beds are middle in development degree, and only make complicated the relationship of oil and water in local areas.
Key words: Braided river; Barrier beds; Interbeds; Hierarchical structure.
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