石油钻采工艺2017，Vol.39Issue(3)：271-274,281,5.DOI:10.13639/j.odpt.2017.03.003
崖城气田含水汽凝析气偏差因子预测方法评价
Evaluation on the prediction method of Z-factor of gas condensate with water vapor in Yacheng Gasfield
摘要
Abstract
Z-factor of natural gas is one important parameter for gas reservoir engineering calculation, and it is mostly calculated by means of empirical formula. Different calculation methods are different in application range and precision, and the effect of water vapor is usually neglected in the conventional methods used for calculating Z-factor of gas condensate, so the calculation error of Z-factor is larger. In this paper, different calculation methods were adopted respectively to deal with these difficulties. Then, Z-factor of gas con-densate with water vapor was calculated by using correction models (e.g. WA and Casey). Finally, the calculated Z-factor was compared with the measured value, and the applicability of three models (i.e., HY, DBR and DAK) to calculate Z-factor of gas condensate with water vapor was evaluated. It is indicated that when Z-factor of gas condensate with water vapor is calculated, the error of Z-factor which is corrected by the correction model is much smaller. The precision of three methods (i.e., HY, DBR and DAK) varies with the value of reduced pressure (pr). Their calculation precision is similar while 0≤pr≤3.87. The calculation precision of HY and DAK is higher while 4.84≤pr≤6.56. And the calculation precision of DAK is much higher while 3.87≤pr≤4.84 and 6.56≤pr≤7.59.关键词
含水汽凝析气/偏差因子/计算方法/崖城气田Key words
gas condensate with water vapor/Z-factor/calculation method分类
能源科技引用本文复制引用
熊钰,李佩斯,邓丹,莫军,李玮,李跃林..崖城气田含水汽凝析气偏差因子预测方法评价[J].石油钻采工艺,2017,39(3):271-274,281,5.基金项目
国家自然科学基金重点项目"致密气藏储层干化、提高气体渗流能力的基础研究"(编号:51534006). （编号:51534006）
