优化设计方法在气井冲蚀计算中的应用

在气井的各类腐蚀中,冲蚀的危害性极大。随着流速增加,冲蚀加剧,如果气流速度增加3.7倍,则腐蚀速度增加5倍。利用优化设计软件对影响冲蚀速度的4个主要参数进行了优化设计,在优化设计的基础上对设计出的18种参数组合进行了冲蚀速度计算,进一步回归出了冲蚀速度计算方程,优化设计所得到的方程平均相对误差为1.43%。还利用优化设计得到了不同井口压力和不同油管直径下的井口防冲蚀最大允许气量,可以很直观的判断是否会发生冲蚀。

Judging the gas well washout by using design of experiment

Washout is the largest damage to gas wells among various erosions.The washout increases along with the increment of gas flow velocity.If the gas flow velocity increases 3.7 times,the erosion velocity does 5 times.Four main parameters which affect washout are designed by using design of experiment in this paper,and washouts are calculated according to 18 combinations of the parameters,and the regression equation for washout is obtained by using DOE.washout curve is obtained for different parameter combination,so it is very intuitive to judge washout.