岩性油气藏 ›› 2022, Vol. 34 ›› Issue (3): 93103.doi: 10.12108/yxyqc.20220309
李晓辉, 杜晓峰, 官大勇, 王志萍, 王启明
LI Xiaohui, DU Xiaofeng, GUAN Dayong, WANG Zhiping, WANG Qiming
摘要: 辫曲过渡型河流是发育于辫状河向曲流河演化过程中的一种河流类型。综合现代沉积类比、构造演化分析、岩心分析与地震正演,对渤海湾盆地辽东湾坳陷东北部新近系馆陶组沉积体系类型及沉积演化规律进行了研究,并在层序分析的基础上,对馆陶组辫状河、曲流河与辫曲过渡型河流等3种沉积类型的宏观和微观沉积特征、成藏条件进行了对比。研究结果表明:①辽东湾坳陷东北部馆陶组沉积时期,沉积体系由辫状河向曲流河逐渐过渡,其中在馆中段沉积期发育辫曲过渡型河流沉积。②辫曲过渡型河流具有水动力较强、垂向加积与侧向加积相复合、储层发育程度与成熟度适中、砂泥岩低频互层、测井曲线呈箱形与钟形相叠加的沉积特征。③相对于辫状河与曲流河储层,辫曲过渡型河流储层横向连通性好,垂向上间隔发育规模性泥岩夹层,具备更好的储盖组合条件,更有利于油气规模性聚集成藏。
中图分类号:
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