Based on the thin section, grain size, sedimentary structure, vertical sequence, curvature calculation results and log response characteristics of the core in the target interval of the study area, it is shown that typical braided river deposits are developed in the VI sand formation of Y Group in the study area. According to the results of thin slice identification and core analysis, the sedimentary microfacies characteristics of the target interval of the study area are summarized. The relationship between sedimentary microfacies and well logging response is established and applied to the division of single well sedimentary facies. Refer to the recent research results about braided river, both in China and abroad, we propose a braided river sedimentary model of VI sand group of Y Group in Sudan P Oilfield, based on the distribution of braided river in the target layer both on plane and profile, which provides a reliable geological basis for the preparation of the next P oilfield development program.