Abstract: The well logging identification of reservoir fluid property is the key to determine hydrocarbon reservoir in time.Reservoir rocks，physical property and pore texture of Feixianguan Formation，Puguang gas field in northeastern Sichuan，are very complicated，the reservoir is the one with developed fracture and vug accumulative spaces and severe heterogeneity and anisotropy，well logging response is with multiple resolution，which makes identifying reservoir fluid property with logging data even more difficult.Started from conventional logging data analysis，five kinds of fluid property identification methods are optimally figured out，on the basis of analyzing the principles and methods，all kinds of suitable methods which can be used in fracture and cave reservoir in Puguang gas field are probed，a set of simple and reasonable identification method association suitable for the types of reservoirs are presented.

Key words: Puguang gas field, carbonate rocks, fracture and cave, reservoir, fluid identification, suitability