The Nenjiang Formation, south of Songliao Basin, has many hydrocarbon bearing units, but currently the understanding of the distribution of viable reservoir sandstones is too limited to support a development strategy. Therefore, a detailed study on the sedimentary microfacies and reservoir properties has been completed in order to reduce uncertainty and improve subsurface predictions. Nine lithofacies and five lithofacies associations were identified supporting the development of a sedimentary model of a river-dominated delta front setting, which could be divided into four sedimentary environments: subaqueous distributary channel-fill, mouth bar, sand sheet, and interdistributary bay. The distribution sandbodies extend to the south in a tongue-like form, and they thin and pinch out. Finally, the influence of sedimentary process on properties was assessed by establishing the correlation between microfacies and reservoir physical parameters, such as porosity, permeability, pore radius, throat radius, and clay minerals. It is revealed that the correspondence between reservoir physical properties and microfacies types is strong; the physical properties of the subaqueous distributary channel and mouth bar are the best.

松辽盆地以南的嫩江组有许多含烃单元，但是目前对可行的储集层砂岩分布的认识太有限，不足以支持发展战略。因此，为了减少不确定性和改善地下预测，已经完成了对沉积微相和储层性质的详细研究。确定了9个岩相和5个岩相协会，以支持以河流为主导的三角洲前缘沉积模型的发展，该模型可分为四个沉积环境：水下分流河道填充，河口坝，砂岩和分流海湾。分布沙体以舌状的形式向南延伸，变薄并被挤压。最后，通过建立微相与储层物理参数（如孔隙度，渗透率，孔隙半径，喉道半径和粘土矿物）之间的相关性，可以评估沉积过程对物性的影响。结果表明，储层物性与微相类型之间的对应关系强。水下分配通道和口条的物理性能最好。