低渗透油层DST测试卡片解释新方法

针对低渗透油藏低速非达西渗流的特点，充分考虑实测压力的流动期历史和恢复期历史数据及关井后井筒储存效应，建立了新的物理、数学模型；利用有限差分方法求出其数值解，绘制出新型典型曲线图版，提出了解释方法，并进行了实例应用。此方法适用于均质非自喷井，尤其是处理低渗透地层受污染井的结果比较符合地层实际地质情况，其成果的应用对地层改造有一定的指导作用。

A New Method to DST Chart Interpretation in Low Permeability Layer

In this paper, pointed at the characteristics of non-Darcy flow with low velocity in low permeability, a new physical and mathematic model is put forward after flow history data and build-up history data of the observed pressure and the well bore storage effect after shut-in were taken into consideration. The numerical solution is solved used the finite difference method and new typical curve model. Based on the method mentioned above, a new interpretation method was born. This method can apply to homogeneous non-flowing well, especially when apply to tackle the polluted well in low permeability reservoir and its results consist with the practice formation consideration, moreover, it play a conductive role to formation rebuild work.