凝析气井最低允许产量公式及其应用

凝析气井最低允许产量的计算,对优化生产管柱、判断井底是否积液等具有十分重要的意义。从流体的流动过程和其中的影响因素出发,考虑了各种参数的物理意义。严格推导了凝析气井最低允许产量计算公式,计算了不同油管直径和井底压力条件下气井的最低允许产量,并对可能产生井底积液的情况进行了分析和判断;计算了不同压力和气井产量条件下油管的直径,并对管柱进行了优化研究,得到了合理的气井最大油管直径,超过此直径,则在井底将产生积液。从而影响气井的正常生产;分析了提高气井排液能力的几种可能性。

Formulae for Minimum Allowed Production Rate of Condensate Gas Well and Application

The calculation of minimum allowed production rate of condensate gas well is of great significance in optimization of production tubing size and estimation of bottom-hole liquid loading. According to the fluid flowing and the factors affecting flowing, this paper derivates the equation of minimum allowed production rate of condensate gas well, calculates the minimum allowed production rate in different tubing sizes and bottom-hole pressures, analyzed the probability of bottom-hole liquid loading, provides the tubing sizes of different pressures, varied production rates and the reasonable value of maximum tubing diameter. If bigger than this value, the bottom-hole liquid loading will occur, resulting in abnormal production of condensate gas well. Finally, some probabilities of improving the liquid-discharged ability in condensate gas well are analyzed in this paper.