从区域沉积背景出发，以岩心和测井资料分析为基础，对松辽盆地扶余油田泉四段的岩石类型、粒度分布、沉积构造、泥岩颜色及地球化学特征等各类沉积相标志进行分析，确定其为三角洲沉积，包含三角洲平原和前缘亚相。其中，平原亚相可识别出分支河道、决口扇、天然堤、废弃河道、湖泊沼泽微相；前缘亚相可细分为水下分支河道、河口坝、远沙坝、水下天然堤和支流间湾等微相。依据沉积微相与地层格架的成因关系，在中期基准面旋回的控制下应用取心关键井建立了沉积微相的定量识别图板，对非取心井进行沉积微相的定量识别与划分，并在此基础上绘制了沉积微相的平面及剖面图，总结了微相类型的平面和纵向展布规律及其与含油性的关系，指出分支河道砂体发育规模、连续性、储集性、含油性最好，其次为河口坝砂体，为研究区下一步的开发方案提供地质依据。

Based on the regional sedimentary background and the core and logging data, and from an analysis of its facies markers, such as rock type, granularity distribution, sedimentary structure, mudstone's colors and geochemical features, Q4 Member in Fuyu Oilfield, Songliao Basin is identified as in a deltaic deposition which includes delta plain and delta front. The delta plan is composed of branch channel, crevasse splay, natural levee, abandoned channel, and so on. The delta front is composed of underwater distributary channel, mouth bar, distal bar, underwater nature levee, and so on. The genetic type and the development model of sedimentary facies are closely related to the stratigraphic framework. Under the control of the medium-term base level cycle, the quantitatively identified graphic tablet of microfacies is established, based on the application of coring wells. The sedimentary facies of non-coring wells are quantitatively identified and finely classified under the guidance of the identified graphic tablet. According to the analysis results of the sedimentary microfacies, the planar and sectional distribution maps are obtained. The laws of microfacies distribution on the plane and in the vertical direction are analyzed. In order to reveal the relationship between sedimentary microfacies and the oil，the control effects of sediments on oil are further discussed. It is shown that the channel sand bodies have the best performance in development size, continuity, reservoir quality and oiliness, followed by the mouth bar sand bodies. These results can be used for further oilfield production adjustment and development.