关键词: 流动系数, 梯度公式, 计算方法, 最陡下降法, 变尺度法, 目标函数, 油层, 共扼梯度法, 分布参数, 井间

Abstract: Based on the data from observations,the method for determining transmisibility at any points between wells is discussed,poinint out,at the same time,some errors appearing in current literatures dealing with discontinuous functions and Frechet's derivatives.Modifications are proposed and a new formula is derived by applying the pulse variational principle and the concept that the velocity of infiltration on any disccntinuous surface is continuous and derivable.Having taken into consideration the influence of heterogeneity of reservcirs and the different parameters of the neighbouring area,the new formula is a great theoretical improvement.An example is given for illustration.In the last part,the authour brings up a challenge to the concept of non-convexity on objective function or performance index etc.