Water control strategy of bottom water in Zizhou gas field

Water breakthrough not only leads to quick decreased productivity but reduced dynamic gas reserves of well control, which makes it difficult to production management. Therefore,water control is one of the most pressing problems facing in gas reservoirs.As bottom - water occurs widely in Member 2 of Shanxi Formation in Zizhou gas field, the bottom water coning will cause the productivity of gas wells decrease dramatically.Based on the main regional geological features of gas reservoirs,the study on water- control technology in base - water driving reservoirs was carried out.By using Dupuit critical production formula and Schols. R.S model for calculation,the relationship between the gas well critical output and its rational perforating level was obtained in this paper,which provides guidance for development strategy adjustment.