Oil shale is a kind of oil and gas resources with bright prospect. Log technique is the key technique in oil shale exploration and development. In this paper, relying on log work of Yaozhuang oil shale mine, through analysis on log data of typical zk002 drilling well, relationship between the change of the log curves and organic matter content of the strata has been gained, strata lithology has been identified, and the thickness of oil shale layers has been determined. It is showed that the result is almost equal to geological core drilling result. Log technique can well identify shale layers.