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The authors present a new method to identify fluid property based on the water- spectrum database by NM�� logging T 2 spectra in Hailer area�� The T 2 distribution spectrum includes the information of pore structure�� water and hydrocarbon�� The water spectra come from NM�� logging T 2 spectrum of standard water layer��which equates to eliminate effects of hydrocarbon�� The basic principle is using the difference between the constructed water spectrum and the measured spectrum to identify reservoir fluid property�� It is proved that the application effect is perfect in Hailer area��