Abstract: The Shahezi and Yingcheng formation gas reservoirs are lithologic hydrocarbon reservoirs in Jinshan region of Lishu fault depression,Songliao basin.The main sedimentary strata in this area were sand and mudstone;and lithology was relatively simple.In order to assess the reservoir characteristics and distribution,metoposcopic method was used to analyse the seismic facies.5 main seismic facies types were identified in the Shahezi and Yingchen formation.Combined with the core facies,sedimentary facies recognition and logging electrical characteristics,the result showed that there was remarkable correlation between the main seismic facies and sedimentary facies types.It was therefore concluded that seismic reflection could effectively predict the sedimentary characteristics and distribution of reservoir in non- well areas.