Abstract: Through carbonate reservoir classification and the logging response characteristics of fractures of Ordovician weathering crust in Daniudi gas field,the carbonate reservoir type of weathering crust can be divided into cracks,fracture and pore types.According to the types of reservoir and sensitive parameters of fracture identification,the technique of fracture identification and the corresponding fracture reservoir logging interpretation model has been established and the lower limit of reservoir physical property has been determined.Meantime,based on horizontal well logging characteristics,by using the comprehensive logging interpretation technology,the weathering crust reservoir logging interpretation method of horizontal wells and the logging interpretation identification standard for gas and water layers have been established,which lays a solid foundation for the horizontal well logging interpretation evaluation of the weathering crust.The method in Daniudi gas field has obtained the good application effect.