摘要
通过对凝析气井产能分析方法以及流体相态、组分变化、渗流特征的研究，结合状态方程理论及相平衡闪蒸计算方法，引入反映地层中凝析油气体系变化的两相拟压力函数，提出了考虑近井带反凝析液饱和度分布以及动态污染影响的凝析气井产能分析新方法。通过实例计算认为该产能计算方法能较好地反映近井带地层凝析油析出时造成的动态表皮伤害对产能的影响；当地层压力高于露点压力时，预测方法所得的流入动态曲线在井底压力为露点压力处有一拐点，这与实际情况符合，反映了凝析液析出对气井产能的影响。
Through the research of phase and component change of fluid, percolation characteristics;combining the state equation and the flash calculation method for phase equilibrium;introducing the two-phase pseudopressure function which reflects the system change of condensate in reservoir;considering the concentration distribution of retrograde condensed liquid and the dynamic pollution near wellbore zone,a new method for productivity analysis of condensate gas wells is proposed out.Applications of this method show that it can well reflect the influence of dynamic skin damage on productivity near wellbore zone during the precipitation of condensate.When the formation pressure is higher than the dew point pressure,there is a knee point on the inflow performance curve got by the prediction method where the bottom hole pressure is the same as dew point pressure,and this coincides with the actual situation.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1996年第5期32-36,共5页
Natural Gas Industry
关键词
凝析气井
相态
渗流
非达西流
产能
开发
Gas condensate well, phase state,Percolation,Nondarcy flow,Productivity, Analysis.
