Abstract: In order to more accurately predict the distribution of effective sandstone of braided channel reservoir of He?8 member of Lower Shihezi formation in Sulige gas field, and guide its efficient development, this paper studies the braided channel sedimentary microfacies distribution based on hydrodynamic energy. The identification signs and overlapping model for single channel sand bodies in braided river reservoir of He?8 member of the Lower Shihezi formation in Sulige gas field were established to make classification and correlation of these sand bodies. The logging response features of its different sedimentary micofacies were analyzed to develop the transformation model from cores to logs and single well sedimentary microfacies types in the study area. The enveloped characteristics of GR and CNL logs were used to reconstruct the hydrodynamic index curve, and finely describe the planar distribution of the sedimentary microfacies constrained by wa?ter energy thickness distribution. The result shows that the predicted results of effective sands distribution are very closed to that from real drilling application, which can provide effective guide for the gas field development and well deployment