Based on the conclusion of the metamorphic rock reservoir characteristics in Archaean, which is difficult to identify the reservoir and parameters effectively. This paper presents the lithology identification by using the method of cross plot of CNL-GR logging data and content of dark mineral, based on research of reservoir characteristics of Chengbei metamorphic rock reservoir in Jiyang depression. The reservoir fracture identification through the FMI logging and fracture indicating curve is accomplished. This paper also applies porosity spectral analysis of FMI and porosity interpretation from normal logging to confirm the porosity of metamorphic rock fracture reservoir. Through the saturation calculation method of volume distribution and NMR logging, we can determine the reservoir oil saturation and formulate the effective reservoir identification standard. Based on this method, we have obtained a good result in identification of effective reservoir and parameters at Chengbeigu 7 and Shangu 6 blocks of metamorphic rock reservoir in Shengli oil field.