Abstract:River facies reservoir is one of major targets in oil exploration in China,which is characterized by good porosity and permeability,shallow buried depth,high production and wide spread,but on the other hand,the rapid changed channels and unstable facies led to have difficulty in fine interpretation.For that reason,the paper made concentrated studies for fine interpretation and description of river facies reservoir and achieved a certain geologic effects.First,making 3-D theoretical model of river facies reservoir and studying the basic feature of the reservoir;on that basis and taking LHK practical data as an example-analyzing band distribution of river facies reservoir in the region and picking up frequency-division data volume of 20 Hz reflected the feature of frequency of targets and conducting frequency-di vision interpretation of palaeochannel;using the third generation of coherent data volume characterized by anti-noise and good resolution for interpretation of multiple channel sand bodies;exploring the possibility using composite attributes to study geologic bodies and presenting a new attribute—series attribute,i.e.on the basis of seismic attributes taken from raw data volume,the new relative seismic attribute is picked up from it that is of benefit to improve the showing effects.