二连盆地乌里雅斯太凹陷南洼断裂调节构造—坡折带特征及其对储集层分布的控制

在恢复乌里雅斯太凹陷南洼早白垩世古地貌的基础上，分析了调节构造—坡折带特征与沉积体系和储集层分布的关系。结果表明：该复合型构造组合对砂体形态和储集层分布具有控制作用。研究区发育调节构造—上坡折、调节构造—中坡折和调节构造—下坡折，平面上呈北北东向展布。调节构造—坡折带控制沉积体系的发育，形成大规模扇三角洲—湖底扇沉积体系；调节构造—坡折带也控制砂体的形态，形成了7个呈舌状分布的小型湖底扇砂体；多级坡折带提供沉积物堆积的空间，调节构造对物源和水系也具有控制作用。在调节构造—坡折带的控制作用下，南洼储集体类型主要为扇三角洲前缘和湖底扇砂体，且不同级别的复合构造的储集体类型和物性存在差异。

Characteristics of fault accommodation structure-slope break zone and its control on reservoir distribution in southern subsag of Uliastai Sag,Erlian Basin

Based on restoration of the Early Cretaceous palaeogeomorphology of southern subsag of Uliastai Sag,researches have been carried out on the relationship between characteristics of fault accommodation structure-slope break zone,depositional systems,and reservoir distribution.The analyses show that the compound structural assemblage controls the shape of sandbody and reservoir distribution.There are accommodation structure-upper slope break,middle slope break and lower slope break spreading in NNE direction i...