Abstract: Liuyangbao gas field is currently in the early stage of development.Under the condition of dense low permeability gas field developed by horizontal well,It has an important guiding significance in identifying the single sand body and studying its distribution for the optimization of horizontal well deployment.This article take Liuyangbao gas field T2gas reservoir as the research object,carrying out the high resolution sequence stratigraphy research,and based on this,T2 gas reservoir is divided into three short term cycles,and then,we clear about the single sand body identification such as the coal seam,limestone and mudstone interlayer.After that,the study identified the horizontal distribution characteristics and plane distribution characteristics of these recognition marks.Under the constraint of these marked beds,this paper identified two sets of reservoir sand body which formed from different depositional period,summarized three superimposed models of single sand body:superimposed models,isolated type,superimposed type.At last,we set up different horizontal well design principles corresponding to the three kinds of single sand body superimposed pattern.