Abstract: Wells Ba 1 is a venture well for Sinpec.The technology of nuclear magnetic resonance logging is optimized into the logging series for its unique predominance.After a brief out-line of nuclear magnetic resonance logging,the application of nuclear magnetic resonance logging is expatiated from the physical property appraisal of reservoir and the interpretation of oil and gas or water layers at Well Ba 1.It is revealed that the analytical data from the nuclear magnetic resonance is highly correlative to the laboratory routine analytical data,so the data from the nuclear magnetic resonance can be used in evaluating the physical properties of reservoir.In connection with experiences at other areas,the method and the standard are established to assess the physical properties of reservoir and the characters of fluid in Well Ba 1.Interpretation and e-valuation of seven layers in Well Ba 1 shows that the testing results are the same as the evaluation.