Abstract：Spectrum decomposition imaging more directly reflects the physical attributes of reservoir than other seismic attributes.Using the basic principle of spectrum decomposition,the paper conducted the recognition of fault system,analysis of sedimentary environment and lateral prediction of reservoir.The concrete ideas are: firstly,based on the poststack seismic data volume,the spectrum decomposition processing of major targets in studied zone is implemented and a series of tuning data volume with discrete frequencies is obtained;then,using geologic imaging and animation interpretation technique to identify fault system,sedimentary environment and distribution of reservoirs.The application cases showed it can not only guide the interpretation of faults on the sections and their planar combination,but also finely interpret the faults when identifying the fault system;the technique can define not only the type of sedimentary facies,but also their configuration in analysis of sedimentary environment the distribution and thickness of sand body can be simultaneously defined in prediction of reservoirs.
