Through core observation and description and sedimentary facies analysis,and with rich core data,logging information and logging data, the sedimentary facies types and facies patterns of the reservoir in the Chang 6 formation are studied in depth. Based on the analysis of rock type,sedimentary structure,sedimentary tectonics,paleontology and sedimentary environment,it is concluded that the sedimentary period of Chang 6 formation mainly developed the terrestrial lacustrine turbidite fan facies in deep water,and could be divided into three subfacies:inner fan,middle fan and outer fan. The turbidite fan facies model of Chang 6 reservoir in the study area was finally established through the analysis of sedimentary facies and logging equivalence to clarify the planar distribution and vertical evolution of sedimentary facies.