试井图版的计算机制作方法

A Method for Making Well-testing Chartboard with Computer

以无限大均质油藏为例,详细地介绍了样板曲线的计算机制作方法,包括样板曲线的制作原理,零阶、一阶虚宗量第二类Bessel函数的数值计算方法、用Stehfest方法对拉氏空间解进行数值反演等,指出了Stehfest数值反演公式中的一个错误,具体讨论了反演N值的合理取值范围并制作了相应的图版曲线,最后以实例说明了该方法在试井分析中的应用。

By taking the infinite homogeneous reservoirs for example, the method for making a type-curve with computer was introduced , it included its principle, a numerical calculation method of the second kind of Bessel function of zero order and one order, the numerical inversion of Laplace space with Stehfest method. The reasonable value of N in Stehfest inversion and a mistake in the inversion formula are presented.