Abstract：Reservoir prediction based mainly on seismic informations is a general effective method. Nearly all the seismic attribute parameters (amplitude，frequency，etc.) lose their geological significance when seismic data are characterized by the low resolution，low fidelity and low SJN ratio. When there are dense drilling in an area，some characteristic data such as mean value，standard difference，divergence and steepness can be statistically derived from the same interval of various log curves.These statistical characteristic values indicate different reservoir properties respectively，and the plane distribution of one kind of characteristic values exhibits visual lateral variation of the corresponding reservoir property.The volume and reservoiring ability of a reservoir can be determined by using a comprehensive discretion criterion that is derived from various log data，drilling dato and porosity data with the use of fuzzy mathematical method. Then 3D overalldescription of a reservoir is conducted by analysing the sedimentary facies，various seismic inforr iations，Volume and reservoiring ability，so that favourable hydrocarbon area thre can be mapped out reasor abiy. It is practically shown that this method is feasible because prediction result coincides with the drilling result very well.
