摘要
渤海湾盆地中常见沉积体系的断陷湖盆地质结构决定了沉积体系的分布。沉积体系的分布具有环状不对称的特点。在断陷湖盆陡坡发育近岸水下扇、扇三角洲体系;中央深水区发育深水浊积扇体系及湖相暗色泥岩;缓坡发育三角洲、滩坝、碳酸盐岩隆沉积体系。渤海湾断陷湖盆的演化可以划分成早期断陷阶段、中期强烈断拗阶段和晚期衰亡阶段。在盆地演化的不同阶段,沉积体系的分布既有差异性又有一定的继承性,从而建立了盆地发育不同阶段的沉积体系分布模式。渤海湾盆地油气分布与沉积体系展布密切相关,今后的油气勘探应重点考虑地层和岩性油气藏。
The different deposi tional systems were distributed in the different parts of Bohai basin.The nearshore subaqueous fan, fan-delta and alluvial fan systems were developed in the steep slope. The turbidite fan system originated from flood and slumpings occurcd in the deep water subsided region and intercalated with deep water dark muds tone. Delta,beach-bar and carbonate built-up systems evolution of Bohai Bay basin might be divided into a early down faulted stage, middle strong subsidenee stage and late failure (infilled) stage. During the various stage, of the down faulted basin evolution, the distribution of the depositional systems not only possessed the difference, but also the succession. The difference and stage nature of a depression evolution formed a typical vertical sequence of the depositional systems in the down faulted lacustrine basin. The distribution of oil and gas in Bohai Bay basin was related to the depositional systems. Deposition; Hasin evolution; Fault; Model; Bohai Bay
出处
《石油大学学报（自然科学版）》
CSCD
1989年第5期11-17,共7页
Journal of the University of Petroleum,China(Edition of Natural Science)
