【摘要】 根据钻井、岩心、测井、地震等资料,将高邮凹陷缓坡带划分为3个长期旋回,8个中期旋回。MSC1-MSC3时期,研究区持续湖进,湖盆面积不断扩张,到MSC4时期趋于稳定。中期基准面旋回由一系列具有进积、加积和退积叠加样式的短期基准面旋回层序叠加而成,旋回结构以对称型(C型)为主,代表了较大幅度的湖进—湖退过程。应用高分辨率层序地层学理论对研究区目的层进行隐蔽圈闭预测研究结果表明,地层超覆油气藏发育于MSC1-MSC3沉积期内基准面上升时期的中下部,断层—岩性油气藏的形成不但与层序地层有关,而且断层也是该类圈闭形成的主控因素之一,砂岩上倾尖灭油气藏主要发育于短期基准面上升时期的低部位,而研究区透镜体圈闭主要发育于基准面下降时期或者向上变浅非对称型短期旋回内部。更多还原

【Abstract】 According to data from drilling,cores,logging,seism,and so on,the northern gentle slope in Gaoyou Sag was divided into 3 long-term sedimentary cycles,which are subdivided into 8 middle-term sedimentary cycles.From the MSC1to the MSC3 period,the lake basin enlarged continuously,and became to be stable during the MSC4 period.The middle-term base level cycle was overlaid by a series of short-term base level cyclic sequences in manners of prograding,retrograding,and aggrading.Symmetric pattern( C-pattern)is the main cycle structure,which represents the large transgressive and regressive process.Subtle traps of the target stratum in the research area were predicted in terms of the sedimentology,high-resolution sequence stratigraphy theory.Results suggest that the stratigraphic overlap reservoirs were developed in the lower-middle part of the base level rising period at the depositional stage of MSC1-MSC3.The formation of fault-lithologic reservoirs is not only related to sequence stratigraphy,but also faults are one of main controlling factors.The sandstone updip pinchout reservoirs were developed in the lower part of the short-term base level rising period.The lenticular traps were mainly formed in the base level descending period or the rising asymmetric short-terms cycle.更多还原