Abstract: Based on sequence stratigraphy method, the Triassic in Awati sag is divided into four Class-III sequences. In view of internal texture and external configuration, integrated with reflection continuity, reflection amplitude and frequency, five types of major seismic facies are distinguished from the seismic profile, such as parallel sheet seismic facies with high amplitude and high continuity, parallel- subparallel sheet facies with medium amplitude and medium continuity, subparallel facies with mid-low amplitude and low continuity, chaotic reflecting facies and progradational facies. These seismic facies assume obvious distribution in plane and differential and successive features in vertical direction, and have good correlations with Awati sag structure and tectonic evolution in Tarim basin.

Key words: Tarim basin, Awati sag, Triassic, seismic facies