【摘要】 依据削截、上超等不整合标志将沙二段划分为两个地震层序,并选择了可靠性较高的外部几何形态、内部反射结构为主要特征参数,辅助以振幅、连续性,总结出工区内主要发育7种地震相类型。进而分层序勾绘了平面地震相图,发现两个层序地震相在纵向上具有继承性发育的特点。最终在陆相断陷湖盆地震相模式的指导下,综合岩心相、测井相的解释成果,成功实现地震相向沉积相的转化。认为工区主要发育辫状河、辫状河三角洲、扇三角洲、滩坝、浊积扇和湖相6种沉积相类型,并总结出当时沉积体系发育主要有3类模式。更多还原

【Abstract】 Based on the recognition of truncation and onlap,Es2 is divided into two seismic sequences.Then seven types of seismic facies are identified mainly according to external geometrical forms and internal reflection configuration of seismic reflection unit assisted by amplitude and continuity.The spatial distribution of seismic facies by sequence shows the hereditability in the vertical evolution.Finally based on the seismic facies model of continental faulted basin,the seismic facies is converted into sedimentary facies combined with well-log facies and core facies.Results show that six types of sedimentary facies exist in the study area,such as braided river,braided river delta,fan delta,sand bar,turbidite fan and lacustrine facies.And then three depositional models are summarized.更多还原