CO_2气藏废弃压力的研究

The definite method of abandonment pressure for CO_2 gas reservoir

CO2气藏的废弃压力是气藏开采状况的关键参数,它的大小直接影响到气藏采收率的高低,因此如何计算CO2气藏废弃压力显得十分重要。本文通过考虑气藏开采过程中指数式产能方程系数的变化,推导出计算气藏在地层压力不断变化情况下,任意时刻的指数式产能方程,并在井口生产条件一定的情况下,以最小井底流压下的气井最小携液速度为约束条件,确定出了CO2气藏的废弃压力。

abandonment pressure for CO2 gas reservoir is the exploitation of the key parameters,the size of its direct impact on the recovery of the high and low gas reservoir,so the calculation of CO2 waste gas reservoir pressure is very important.In this paper,to consider index-productivity equation factor changes in the the exploitation of gas in the process,Deduced Calculation gas reservoir formation pressure in the changing circumstances,and the index-productivity equation at any time.Then in the well-head produc...