Abstract:

After selecting location for underground gas storage which is rebuilt from oil reservoir, and for maximizing the singlewell production, it is necessary to analyze the reasonable singlewell injection/recovery capability. On the basis of actual conditions of a reservoir and the nodal analysis method, through numerical simulation, the conduitflow dynamicstate is calculated. According to coordinate points, critical erosion flow rate and critical liquid carrying flow rate, the reasonable recovery capability of different size tubing is calculated. According to coordinate points, critical erosion flow rate, formation pressure, formation cracking pressure and compressor normal rated power, the reasonable injection capability of different size tubing is calculated. This research provides some references for how to select tubing size and how to control wellhead pressure while injecting and recovering. The research indicates that the underground gas storage rebuilt from R oil reservoir adopts 184.2mm tubing which is widely used internationally, the gas recovery is 185×10⁴～390×10⁴m³/d, gas injection capacity is25×10⁴～295×10⁴m³/d

Key words: recovery capability, gas injection capability, erosion flow rate, liquidcarrying flow rate, nodal analysis