岩性油气藏 ›› 2015, Vol. 27 ›› Issue (5): 144148.doi: 10.3969/j.issn.1673-8926.2015.05.023
孙廷彬1,2,3,国殿斌2,李中超2,王 玲1,2,4,尹楠鑫1,2,李胜玉5
Sun Tingbin1,2,3, Guo Dianbin2, Li Zhongchao2, Wang Ling1,2,4, Yin Nanxin1,2, Li Shengyu5
摘要:
为揭示浅水三角洲分支河道砂体储层平面展布规律,优选赣江中支入鄱阳湖形成的现代沉积三角洲为代表,利用高清卫星图像测量,统计了河道的分叉角度、分叉频率及河道的弯曲度,并设计了一系列垂直于物源方向的弧形剖面进行分支河道的宽度变化规律研究。结果表明,浅水三角洲分支河道的枝状分叉角度多在 30°左右,且随着三角洲的推进,河道分叉的频率下降;河道宽度整体呈减小趋势,且与河道分叉有密切关系:河道宽度减小速率随河道分叉频率的降低而减小;河道接近分叉口过程中宽度明显增大,平均增幅达 108%;分叉后的河道宽度明显小于分叉前的主干河道,平均减幅为 49%。
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