非均质油藏试井分析新方法

用一种基于一般压力导数解(GPDS)的反解法(ISA)，通过递归算法计算出地层渗透率分布函数，既适用于渗透率变化较大的油藏，又适用于不出现半对数直线段的压力数据。本方法借助于其它手段同样可得到两相、多层非等厚、平面非均质等情形下的渗透率分布函数；对于试井压力恢复数据，只要对其进行时间校正，也可用此方法；同时，由该方法所得到的递推公式便于实现与计算机技术的结合求解，若将之应用于数值试井，可改善数值试井的算法，提高计算效率；此外，该方法对于研究剩余油分布、确定生产指数、确定地层压力分布和平均地层压力等都具有重要意义。

A New Well Testing Analysis of Heterogeneous Oil Reservoirs

ISA (Inverse Solving Algorithm) , based on the GPDS( General Pressure Derivative Solution), can calculate the stratum permeability distribution function though recursion algorithm. It can be adapt to not only the oil reservoir with large variety permeability but also the pressure data included in the semi-log straight-line segment.The permeability distribution function in double phases, multilayer and uniform thickness and plane heterogeneous reservoir can be got by this method. It can also be used in the pressure buildup data only if the data are modified by according to the time. At the same time, the recursion formula of this method can realize the solution combining the computer technology expediendy. If it is applied in the numerical value well testing, the numerical value well testing algorithm and the efficiency can be improved. In addition , this method has important meaning to oil remaining distribution study, production index determination, stratum pressure distribution determination and the average pressure.