【摘要】 乌尔逊凹陷为海拉尔盆地的一个亚盆地,面积2350 km~2。上侏罗统大磨拐河组厚达2000 m,可划分为两个地震层序四个亚层序。根据地震反射图形的几何形态和地震相分析,建立了大磨拐河组分段砂体的平面分布,划分出近岸水下扇、远岸浊积扇、纵向搬运的浊积岩体、非扇状浊积岩体、三角洲和滩坝等沉积体。更多还原

【Abstract】 The Wuerxun Depression, a sub-basin of the Hailar Basin, covers an area of2350 km~2. The Upper Jurassic Damoguaihe Formation, which is a significant hydrocarbongenerating and reservoiring sequence and up to 2000m thick, can be divided into two seis-mic sequences and four subsequences. According to the study of seismic and sedimentaryfacies, it can be primarily classified as nearshore subaqueous fan, offshore turbidite fan,longitudinal transported turbidite body, non-fan turbidite body, delta, beach and bar. Theformation, evolution and spatial distribution of these sedimentary bodies were controlledby tectonic movement, lake-level changes and sediment supply.更多还原