In the process of well test, the manual methods, estimating method and interpolation by chart, are usually used to deal with surface data, which are tedious and have great errors.
油气井测试过程中，处理地面数据的常用方法是估计估算、查表插值的手工法，这种方法既繁琐且误差大。
2
In this paper, a kind of rational interpolation method is given. Its error estimate and recurrence algorithm are also obtained. Numerical test shows that the convergence of this method is good.
本文研究了二元有理插值逼近，给出一种逼近方法及该方法的递推算法、误差估计和实例。
3
A precipitation interpolation experiment is taken to test the model in Guxian drainage area. Guxian drainage area lies in down stream of Yellow river basin belong to a mountain area.