Principle component seismic property parameter are extracted through seismic short time window, subordinated function of sandstone developing degree is set up by using the already known well by-path to determine the fuzzy mode. 本文通过从地震短时窗内提取振幅系列主分量地震特征参数,利用已知井旁道建立储层砂岩发育程度的隶属函数确定模糊模式。