Abstract: There exists a set of thick conglomerate body in Xiazijie formation of Permian in Wuerhe area in Wu-Xia fault belt, and highyield oil zone was found at the top of it. However, it is not obvious differences in seismic reflection between the conglomerate and underlying strata, which allow the identification and tracing to be difficult. This paper presents in-depth research on that by frequency attribute analysis and finds out the reflected differences. By 3D seismic data process, the conglomerate feature is confirmed, and its plane distribution is outlined. The results show a coincidence with the well data.

Key words: frequency attribute, conglomerate, time-frequency analysis, frequency division section