鄱阳湖浅水三角洲分支河道分布特征

doi:10.3969/j.issn.1673-8926.2015.05.023

LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (5): 144-148.doi: 10.3969/j.issn.1673-8926.2015.05.023

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Distribution characteristics of branch channel of shallow delta in Poyang Lake

Sun Tingbin^1，2，3， Guo Dianbin²， Li Zhongchao²， Wang Ling^1，2，4， Yin Nanxin^1，2， Li Shengyu⁵

1. Postdoctoral Work Station ， Sinopec Zhongyuan Oilfield Company ， Puyang 45700 ， Henan ， China ； 2. Research Institute of Exploration and Development ， Sinopec Zhongyuan Oilfield Company ， Puyang 457000 ， Henan ， China ； 3. Postdoctoral Center ，China University of Petroleum ， Beijing 102249 ， China ； 4. Postdoctoral Center ， Northwest University ， Xi ’ an 710127 ， China ；5. Institute of Sedimentary Geology ， Chendu University of Technology ， Chendu 610059 ， China

Online:2015-09-26 Published:2015-09-26

Abstract

Abstract:

Contemporary delta in Poyang Lake was preferred to quantitatively characterize the sand body distribution rule of branch channel of shallow delta. The branching angle, branching frequency and bending of channel were measured by high-definition satellite pictures. The width variation of the branch channel was studied by intensive sampling on the base of a series of parallel curved profiles vertical to the provenance direction. The result shows that the channel is a dendritic shape with the branching angle being about 30°, and the branching frequency decreases with the advancing of the delta. The channel width has a decreasing tendency with the advancing of the river, and the variation is serious influenced by the branching process. The channel width decreasing rate decreases with the decreasing of the branching frequency; around the branching location, the channel width increases about 108% in average; the branch channel decreases about 49% compared to the width of pre-branching channel.

Key words: reservoir properties, cementation, dissolution, Donghetang Formation, Tarim Basin

Sun Tingbin， Guo Dianbin， Li Zhongchao， Wang Ling， Yin Nanxin， Li Shengyu. Distribution characteristics of branch channel of shallow delta in Poyang Lake[J].LITHOLOGIC RESERVOIRS, 2015, 27(5): 144-148.

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