The effects of reservoir fluid property in high and low pressure and the starting pressure gradient on the percolation laws were taken into account in this model.
给出了极限井底流压和产量拐点的求解方法，分析了启动压力梯度、流体性质等因素对低渗透油藏油井产能的影响。
Idea of drainage area based on whole image information takes account of local information when it is applied on gradient image.
流域思想利用了整体信息，应用于梯度图像上，兼顾了细部信息。
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