为查明海拉盆地克鲁伦凹陷下白垩统铀成矿潜力，综合利用岩心、测井和地震等资料，通过层序地层与沉积相分析方法研究了区内和的层序地层空间展布、沉积相类型与展布特征以及铀富集有利空间位置。结果表明：确定克鲁伦凹陷目的层段三级、四级层序地层划分标志，将目的层段划分为1个二级层序、2个三级层序以及4个四级层序，同时阐明了层序地层展布特征。区内目的层段主要发育扇三角洲-湖泊相沉积体系，沉积相平面上具有近源、相变快和分布范围小的特征。区内目的层处于高位域沉积时期的扇三角洲平原辫状水道砂体和扇三角洲前缘水下分流河道砂体具有良好的铀成矿潜力。

In order to find out the uranium metallogenic potential of the Lower Cretaceous in Kelulun Sag of Hailar Basin, the spatial distribution of sequence stratigraphy, types and distribution characteristics of sedimentary facies and favorable spatial location of uranium enrichment in the area were studied by using sequence stratigraphy and sedimentary facies analysis methods based on core, logging and seismic data. The results show that the third-order and fourth-order sequence stratigraphic division marks of the target strata in the Kelulun Sag are determined. The target strata are divided into one super sequence, two three-order sequences and four fourth-order sequences, and the distribution characteristics of sequence stratigraphy are clarified. The sedimentary system of fan deltalacustrine facies is mainly developed in the target layer in the area. The sedimentary facies plane has the characteristics of near source, fast phase change and small distribution range. The braided channel sand bodies of the fan delta plain and the underwater distributary channel sand bodies of the fan delta front have good uranium metallogenic potential.