电阻率测深的数字解释

本文主要介绍了应用积分变换的方法和采样定理将视电阻率ρs曲线作线性滤波,得出一新的电阻率转换函数T′曲线,然后,以层参数（各层的电阻率和厚度）算得的T用最优化数值方法在DJS-6型电子计算机上与其进行自动拟合,以达到解释电测深曲线的目的。 文中简述了戈什（Ghosh）提出的对ρs作线性滤波的原理,介绍了与国外不同的取样间距和滤波系数的确定以及阻尼最小二乘法和变尺度最优化法的计算框图和应用,最后附有实例和简要的讨论。

NUMERICAL INTERPRETATION OF RESISTIVITY SOUNDING CURVES

Methods of integral transforms and sampling theorem have been employed to carry out linear filtering of the apparent resistivity curves. In this way a new resisti-vity trans-form function T' and its corresponding curves are obtained. Then,by using the assumed layer parameters （layer resistivity and thickness）,caloulation of the function T with automatic fitting,by the optimum method on the DJS-6 electronic computer with the apprarent resistivity field curves for their interpretation can be car-ried out.After a brief mention of Ghosh's idea of linear filtering of the apparent resistivity curve,the difference between the methods of choosing the sampling interval and the filter coefficients used by other authors and ours has been pointed out. Besides,the computer block diagram and their applications to the optimum methods of damped least squares and variable metric are introduced. Finally,a short discussion of some actual examples of numerical interpretation of apparent resistivity curves is made.