双参数填充函数及其在测井优化解释中的应用

BIPARAMETRIC FILLING FUNCTION AND ITS APPLICATION TO OPTIMAL LOG INTERPRETATION

笔者曾对单参数填充函数及其在测井最优化解释中的应用进行过讨论,并根据试用结果指出了单参数填充函数存在着不能有效地提高寻优速度的问题。本文介绍双参数填充函数的建立及其在测井最优化解释中的应用。计算结果表明,双参数填充函数除具有单参数填充函数的基本性质与功能(求出多值目标函数的全局最优解)外,明显提高了寻优收敛速度。

Some years ago, the authors had studied the ONE PARAMETER FUNCTION AND ITS APPLICATION TO OPTIMAL LOGGING INTERPRETATION. Based on the results obtained,it has been pointed out that only with the one parameter filling function, the procedure for optimization will be time consuming. In this paper, the biparameter filling function with its application was introduced. Results show that , except for possessing the same characteristics and functions as those of the one parameter function (e. g. ,to extract the overall optimal solution from the multi-extreme objective function) ,the most favourable merit of the biparameter filling function is ,to speed the convergence in optimal-searching and thus made it time-saving.