压降试井技术在辽河油田SL储气库中的应用

在储气库运行过程中,由于周期性注采气造成库区内压力频繁变化,导致储层注采能力及物性出现不确定性的变化,为此,持续开展了停注后压降试井工作,监测注采井压力与注采气量,总结库区内地层压力、储层物性参数(井筒储集系数、表皮因数、渗透率等)、储层边界随时间与累积注入量的变化规律,明确了注采井注气波及范围及地层连通情况,为地下储...

Application of drawdown test technology in SL underground gas storage of Liaohe Oilfield

In the operation process of gas storage, cyclic gas injection and production causes frequent pressure change in the storage area, leading to uncertain change of reservoir injection/production capacity and physical property. Drawdown test after injection stopping was carried out continuously and the pressure and gas injection/production rate of injection/production wells were monitored. In addition, the variation laws of formation pressure, reservoir physical properties (well storage coefficient, skin factor and permeability) and reservoir boundary with time and cumulative gas injection in the storage area were summarized, and the gas injection swept scope of injection/production well and the formation communication situation were clarified, so as to provide a reliable basis for the safe operation and scientific control of underground gas storage. The drawdown test technology has been applied more than 50 well times since the initial stage of gas storage construction, which ensures gas injection pressure and formation pressure to satisfy the design requirements for the safe operation of gas storage and provides reference experience for the monitoring operation of other gas storage groups in Liaohe Oilfield.