一种计算产能方程α值的新方法  

A new method to calculate the ＂α value＂ of productivity equation

作　　者：何磊[1,2] 兰义飞[1,2] 游良容[1,2] 谢姗[1,2] 袁继明[1,2] 田敏[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,710021 [2]低渗透油气田勘探开发国家工程实验室

出　　处：《低渗透油气田》2016年第2期90-94,共5页

摘　　要：常用的单点产能试井方法是通过统计大量的产能测试资料，得到气田或者区块平均的α值，建立相应的单点法产能方程。该方法在鄂尔多斯盆地非均质气藏应用中受到储层条件、测试资料等因素的影响，大量的试井结果显示，单一的产能方程在各井应用中，存在较大的误差。通过对二项式产能方程的推导分析，发现影响单点法α值的主要因素是地层压力，在此基础上，建立了α值求取的新方法，相比传统方法而言，大大提高了气井无阻流量的计算精度。The commonly used single-point productivity well test method is to obtain the average αvalue of the gas field or the block through the statistics of a large number of productivity test data, and establish the corresponding single-point method productivity equa- lion. Application of this method to the heterogeneous gas reservoirs in Ordos Basin is ＇affected by the reservoir conditions, test data, and other factors. A large number of well test results show that there is a big error in the application of single productivity equation to each well. Based on the derivation of the binomial productivity equation, it is found that the main factor affecting the α value of the single- point method is formation pressure. On this basis, a new method to obtain the α value is established. Compared with the traditional method, the new method greatly improves the calculation accuracy of the open flow capacity of gas wells.

关 键 词：气井 单点法 无阻流量 产能方程 试井 a值 

分 类 号：TE37[石油与天然气工程—油气田开发工程]