Feasibility Study Of Rebuilding Underground Gas Storage In S20 Sandstone Condensate Gas Reservoir

After entering the 21st century,China’s economy has gradually changed from barbaric growth to scientific development,and environmental protection requirements have become higher and higher.The demand for natural gas,a clean energy,has also grown rapidly.Under this situation,the gas shortage has frequently occurred in recent years.So the rapid construction of a large number of underground gas storages to improve seasonal peak shaving capacity and ensure gas supply safety has become the most important problem today.At this time,sandstone condensate gas reservoir reconstruction will be carried out.Research on underground gas storage is very necessary.Based on the fine geological research of the S20 condensate gas reservoir target,this paper applies geological modeling,gas reservoir engineering,numerical simulation and other technical methods to carry out reservoir distribution law,gas reservoir dynamic analysis,injection and production capacity evaluation,and engineering plan design,to carry out the feasibility study of the S20 sandstone condensate gas reservoir reconstruction gas storage.The following conclusions are obtained through research.The S20 condensate gas reservoir has the development characteristics of a closed gas reservoir,with good trap sealing and weak water energy.The evaluation of gas injection and production capacity shows that when the horizontal section of a horizontal well is between 250-500 m in length,its single well productivity is about 3-6 times that of a vertical well.After the completion of the S20 gas storage,the working gas volume is about 0.717×10~8 m~3,the air cushion gas volume is 1.22×10~8 m~3,the total daily gas production volume is 41×10~4-86×10~4 m~3,and the total construction period is 2-3 years.