实测续流量的试井数学模型及解释方法

由于油藏低渗透或存在井网、多层等干扰，大量油井的压力恢复曲线难以出现径向流直线段，有的井甚至不存在径向流动段，这些测试资料不能用常规试井分析方法解释，用其它试井方法解释也具有多解性，通过对油井实测续流资料的研究分析，认为用续流资料进行试井解释的新方法，对实测压力数据点落在半对数直线段上方和下方的两种情况的解释效果都较理想，这种新的试井解释方法大大提前了半对数直线段出现时间，缩短了关井时间。

The mathematical well-test model for measuring after-flow rate and its interpretation method

In well test data of middle late period of oilfield development, due to the perturbative phenomena of low permeability, well pattern or multi layer reservoir, a lot of pressure build up curves are hard to show a radial flow straight line period. Even in some wells, the shut in time is very short, but they already showed the influence of boundary or cross well interference. In this case, the general method of well test can't interpret these data. If using other methods of interpretation, it is often with multi solutions. Analysis on the measured after flow data indicates that once accurate pressure and after flowrate are obtained, the short time well testing problem, which has not been solved by other well test interpretation methods for a long time, can be solved. As a result, a new method for using after flow data to interpret well test results is put forward in this paper, which can provide an ideal interpretation results for the two cases as the measured data points falling into the areas above or below the semi log straight line, and move up greatly the time of occurrence of the semi log straight line, so, shorten the well shut in time.