Through lithofacies analysis and detailed sand body anatomy of the meandering river sand bodies in the Quantou Formation of Zhaoyuan area, the sedimentary characteristics are summarized, and the sandstone architecture and profile distribution characteristics under different interface levels are compared. By selecting the best seismic attributes, each subdivision geological models are established, and different period river parameters are calculated. This provides some geological basis for later reservoir description and remaining oil potential development. The study area from Quan3?鄄2th layer to Quan4?鄄4th layer develops meandering river facies, which are subdivided into meandering channel, crevasse fan, natural dike and flood plain microfacies. There are five types of architecture interfaces in meandering channel sand bodies. The fifth?鄄level interfaces limit meandering river sand body space distribution, and 2?鄄8 fourth?鄄level interfaces were further developed. Controlled by the southern source, there are two stages of meandering channels spreading in the north?鄄south direction. Due to the frequent swing of the channel, many branches were formed in each stage. The frequency of channel bifurcation?鄄merging is the highest in the periphery of Changchunling anticlinal belt and east of Daqing placanticline.
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