Abstract: Reservoir type is controlled by the Volcanic facies. In the deep volcano rock exploration of Xujiaweizi depression, lithofacies research is the key technology for volcano reservoir prediction, and the low recognition accuracy restricts the process of exploration and development. Well logging data is rich information and high precision.However, the application of well logging data in the identification of volcanic rock facies has not been formed. Guided by the geological theory, through the gamma ray, density, neutron, acoustic and resistivity logging are used to study the mechanism of the lithofacies identification, and the process and method of logging identification for the study area are established.