不稳定试井分析新图版

A new typical curve for pressure transient test analysis.

在现代试井分析中，典型曲线图版拟合是主要分析手段。图版拟合中普遍存在的较强多解性一直未很好解决，即使目前最常用的压力及其导数与时间的双对数复合图版也是如此。建立了一种新的图版，该图版有２个，一为用于分析渗透率的图版（Ｋ图版）；另一为用于分析井筒储存系数的图版（Ｃ图版）。新图版的特点是曲线形状差异较大，特征明显，且拟合时只需水平方向移动，解的唯一性强。实际数据分析表明，在拟合分析试井早期测试数据时，也可获得较准确的地层参数。

In modern well testing analysis, typical curve match is the main analysis method, but multi solution still exists which has not been solved even for pressure and derivative type curves. This article presents a new kind of curve, which has two curves, one is K curve that is used to analyze permeability, the other is C curve used to analyze wellbore storage factor. The new typical curves are characterized by great difference in curve shape, obvious feature, horizontal movement during matching and unique solution. Actual data have indicated that this method can be used to obtain accurate formation parameters from earlier data in short time test.