水平井数值模拟中关于生产指数的计算

On the calculation of the production index (PID) in the numerical simulation of a horizontal well

利用Abou-Kassem和Aziz所提出的解析水平井模型,找到一种水平井以任何方式穿过网格块时可以提高生产指数计算精度的方法.运用该方法在三维三相黑油模型基础上编制了水平井数值模拟软件.用该软件的实例计算结果表明:生产指数不但与水平井所穿过网格块的长度呈比例关系,而且与水平井离网格表面的距离有关.

A method for improving the calculating precision of the PID of the horizontal well crossing grid in any way is found by using the analytic horizontal well model presented by Abou-Kassem and Aziz. The numerical simulation software for horizontal wells is developed based on three-dimensional three-phase black oil model. The application result of the software to a case shows that, the value of the PID obtained using this method is not only directly proportional to the length of the grid through which the horizontal well crosses, but also related to the distance from the horizontal well to the surface of the crossed grid.