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介绍了用油藏实际开采速度作为岩心流动实验的驱替速度时 ,获得相对渗透率曲线的方法。用有限差分方法求解渗流方程组 ,建立的相对渗透率曲线模型是一不确定模型 ,有四个待定参数。用最优化方法使得累计产油量和岩心两端的压差的计算值与实测值之间的方差和最小 ,反求相对渗透率曲线模型的待定参数 ,从而确定相对渗透率曲线。这种方法克服了JBN方法的局限 ,在求低渗岩心的相对渗透率曲线时充分显示了它的优越性。
The method of obtaining the relative permeability curve when the actual production rate of the reservoir is used as the displacement speed of the core flow experiment is introduced. The finite difference method is used to solve the seepage flow equations. The established relative permeability curve model is an uncertain model with four parameters to be determined. The optimal method is used to minimize the variance between calculated and measured values of cumulative oil production and pressure drop across the core and reverse the relative parameters of the relative permeability curve model to determine the relative permeability curve. This method overcomes the limitations of the JBN method and fully demonstrates its superiority in finding the relative permeability curve of low permeability core.