Abstract: Based on the seismic attribute classification proposed by Quincy Chen and others for reservoir characteristics, this paper discusses the methods of seismic time window selection and attribute pretreatment. The criteria and procedure of seismic attribute effectiveness analysis and algorithms of seismic attribute optimization are presented. An example of reservoir prediction in Block Fangshen2 of Songfangtun Oilfield in Daqing is also presented in the paper. The author believes that extraction and effectiveness analysis of seismic attribute is the prerequisite for high-precise seismic reservoir prediction, therefore much attention should be devoted.