Abstract: The Carboniferous volcanic rock in Xiquan area of Junggar basin is an important oil-bearing stratum, but the lithology identification of the volcanic rock is still a problem to be solved. Based on the optimization of gamma-ray and density logging curves sensitive to lithologies of the volcanic rock, the paper establishes a lithological composition identification chart for the Carboniferous volcanic rock in Xiquan area of Beisantai swell, Junggar basin, based on which the volcanic rock in the study area can be classified into 3 categories such as basic rock, intermediate rock and intermediate-acid rock; then the paper optimizes acoustic transit time and deep lateral resistivity logging curves sensitive to volcanic rock structures, and establishes a lithology identification chart for the volcanic rock in the study area, based on which the lithologies of the volcanic rock in the study area can be classified into 6 types. A 3D lithology identification chart combining gamma-ray, deep lateral resistivity and acoustic transit time logging curves can be used to effectively distinguish the overlaps of andesite and andesitic breccia lava. The 3 identification charts for the volcanic rock are used to identify the lithologies of volcanic rocks in 10 wells in the study area and the matching ratio of the identification results with the thin section analysis results can reach 75.8%, indicating that good application results of the 3 charts have been gained in the study area and the charts can provide new techniques for volcanic rock lithology evaluation with conventional logging data in the study area in the future