Abstract: In order to better develop the gas field with low permeability,Yonghe gas field with low permeability,low pressure,low abundance has been taken as the example.Based on previous geological exploration and test analysis,the research on reservoir property characteristics,fluid properties and temperature pressure system have been carried out.The results indicate Yonghe gas field belongs to a lithologic gas reservoir of intergranular pore-groove type with boundless bottom water constant volume elastic drive.As Yonghe gas field gradually entered into the stage of development and construction,combined with the prophase research,the comprehensive research on well location deployment,well type optimization,development series and development manner has been carried out.By using numerical simulation,the optimization selection and orientation of the horizontal section length of horizontal wells,and horizontal section of the gas reservoir distribution have been analyzed.The results show Shan-2 series of Yonghe-18 well block is an enriched reservoir,by adopting a series of natural energy depletion depressure method better development results can be obtained.