关于压力导数计算方法的研究

A STUDY ON THE ESTIMATION OF PRESSURE DIRIVATIVE FOR TRANSIENT PRESSURE DATA

典型曲线及压力导数分析法在现代试井分析中已广泛使用,但关于压力导数计算方法的问题却一直未能得到很好地解决,因而直接影响了试井解释的最终结果,本文从微分法的原理出发给出了N点一元线性回归求导方法,并较详细地介绍了“窗口”求导技术,对变产量试井数据也给出了相应的求导算法,较好地解决了试井分析中压力导数计算的方法问题。

Type curves and pressure dirivatives are widely used in modern well test analysis,The estimation of low noisypressure dirivative is however a difficult problem. A 'WINDOW' technique is introduced in this paper for estimatingpressure dirivatives. An algrithm for variable rate test data is also presented, low noisy dirivatives can be obtainedwith the techniques.