Abstract: Detailed descriptions of cores from Ka-001, Ka-002, Ka-003 and Ka-6 in Ka-6 Well Block are presented in this paper. In light of these lithologic features, integrating with well log data and seismic data, six types of lithofacies of glutenite,conglom-eratic sandstone,inaquigranular lithic sandstone, pure sandstone, siltstone and mudstone are classified into, along with their verti-cal sedimentary sequence features and special depositional structure features,followed by providing sedimentary facies patterns and distribution. It is concluded that the Palaeogene Ziniquanz formation (E_1-2z), Anjihaihe formation (E_2-3a) belong to braided river-delta front sub-facies. Furthermore, lots of reservoir data from lab petrophysical analysis are studied and the reservoir characteris-tics and qualities are evaluated.

Key words: Junggar basin, lithofacies, sedimentary facies: reservoir rock, feature