气井供气范围近似估算方法

Approximate Estimation of Drainage Radius of Gas Well

气井供气半径是气藏工程计算的一个重要参数,目前没有通用的计算方法。根据物质平衡法和容积法计算动态储量的原理及气井试井的产能计算公式,利用动态储量与等价控制范围的关系,提出了两种计算气井供气半径的方法。千米桥气藏的计算结果证实,采用这两种计算方法计算气井供气半径是可行的。

Drainage radius is an important parameter in gas reservoir engineering. So far any effective method has no been proposed. Based on the integration of a material balance equation and deliverability equations, the relationship between performance reserve and control range was found, and estimation methods of drainage radius during the period of well testing and production are suggested. It is robust by actual application to Qianmiqiao gas condensate reservoir.