压降法在凝析气藏应用中的改进

压降法是气藏工程中的重要方法。它不但可以确定定容气藏的原始地质储量和可采储量，而且还可以判断气藏的驱动类型，以及预测未来的开发动态。本文依据凝析气藏开发过程中，随着气藏地层压力下降，流体组分变化的特点，对压降法在凝析气藏中的应用进行了改进，提出了利用压降法计算凝析气藏地质储量和可采储量时，必须考虑开发过程中流体组分变化因素，特别是对高含量凝析气藏更不可忽略。通过实际应用表明，改进后的方法计算结果更符合凝析气藏实际。

The Improvenent of Pressure Decline Method in Condensate Gas Reservoir Application

Pressure decline method is important in gas reservoir volume can be determined but also the driving type of gas reservoir can be judged and the future development performance can be forecasted.According to fluid component varied characteristics along with formation pressure of gas reservoir declining in the process of development of condensate gas reservoir,the application of pressure decline method within condensate gas reservoir is improved.At the same time,fluid component variation in the process of development must be taken into consideration if pressure decline method is applied to calculate the reserves in place and recoverable reserves of condensate gas reservoir,in particularly,it can not be ignored to high condensate gas reservoir.The actual application shows that the results applying improved method is more accordant with the actual condensate gas reservoir.