气体偏差因子简易计算方法

Simple and convenient calculation method of gas deviation factor

气体偏差因子计算方法多种多样,选取合理、简便的计算方法势在必行。基于气体渗流理论,联立二项式产能公式与气藏物质平衡方程,得到气体偏差因子的简易方法,利用气井生产数据对本文模型进行了验证,并与常规DAK法对比。实例论证表明,本文模型计算结果与DAK法计算结果相对误差较小,且计算较为简单,更适用于气田开发过程中的大规模计算过程中。本文研究可为气田开发实际过程中简易计算偏差因子提供新的思路。

Gas deviation factor has different calculation methods and it is imperative to select a reasonable,simple and convenient method.Based on the gas seepage theory,binomial capacity formula combined with gas reservoir material equilibrium equation is used to conclude a simple and convenient method to calculating gas deviation factor.The model of this paper is verified by gas well production data,which is also compared with conventional DAK method.Case demonstration results show that the relative error of the calculated results by this model is smaller than that of the results by DAK method,and also,the calculation is simpler and more suitable for the large-scale calculation in gas field development.This research can provide a new idea for the simple and convenient calculation of gas deviation factor in gas field development.