不同地层压力下凝析气井无阻流量的确定方法——以hd1断块流二Ⅳ油组为例

凝析气藏开发过程中凝析油析出导致无阻流量计算难,同时采取多井次的产能测试求取无阻流量,导致生产成本高。不同地层压力下凝析气井无阻流量的求取方法研究显得尤其重要,通过将凝析油体积换算为当量气体体积,根据当量气体体积,利用指数式和二项式公式对工区已有气井进行无阻流量计算,各井无阻流量和地层压力回归呈较好的指数关系,新井可根据回归公式计算无阻流量。并根据研究工区的实际情况,将现场产能测试结果与计算预测值对比分析,两者结果相近,证明该方法可以用于凝析气井无阻流量计算,并对其他气藏开展类似工作具有一定的借鉴意义。

The Method of Determining Open Flow Rate of Condensate Gas Wells under Different Formation Pressures-Taking LiuII Oil Group in hd1 Fault Block as an Example

It is difficult to calculate the open flow rate due to the precipitation of condensate oil during the production of condensate gas reservoirs, meanwhile, the multi-well capacity test is adopted to obtain open flow rate, resulting in high production cost.It is especially important to study the method of calculating the open flow rate of condensate gas wells under different formation pressures.By converting the volume of condensate oil into the volume of equivalent gas, according to the volume of equivalent gas, the open flow rate of existed gas wells in study area can be calculated by the exponential and binomial formula. They have a good exponential relationship with the open flow rate and formation pressure. The open flow rate of new wells can be calculated by the regression formula. According to the actual situation of the study area, they are similar when the field productivity test results are compared with the predicted values, which proves that the method can be used to calculate the open flow rate of condensate gas wells, and it has certain reference significance for other gas reservoirs to carry out similar works.