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中文摘要：
由于流体在低渗透油藏中渗流存在启动压力梯度，如何考虑启动压力梯度的影响来确定低渗透油藏的有效驱动半径，是提高低渗透油藏开发效果的主要研究内容之一。考虑启动压力梯度的影响，应用一源一汇的产量公式推导出低渗透油藏的有效驱动半径计算公式，可以确定在一定的注采条件下有效驱动半径与地层物性的变化关系。实例应用结果表明：低渗透油藏的有效驱动半径与压差、油藏厚度成正比，与启动压力梯度成反比。
英文摘要：
Due to the starting pressure gradient existence in the liquid flow in low-permeability oil reservoir, how to consider the influence of the above gradient and determine the effective drive radius is the main study project in enhancing the development effects of this kind of oil reservoir. When evaluating the influence, the calculating formula of effective drive radius in the low-permeability oil reservoir is deduced by one source-one convergence production formula. It can be determined that under a certain injection and production conditions there is a certain changing relation between effective drive radius and the physical properties. The applied example shows that the effective drive radius is in direct proportions to pressure differential and reservoir thickness in low-permeability oil reservoir, and in inverse proportion to the starting pressure gradient contrarily.
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