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井-井电法测量可用于圈定导体的延伸范围,而无须考虑该导体是否被钻孔穿透。这种电法可用于优化钻孔和圈定构造。虽然在井-井装置的仪器操作中并无特殊的问题,但对结果的解释已证明是困难的。我们设计了一个程序,用于计算非均匀半空间(埋藏在层状地层中的三维体)中由直流电产生的电位。本程序可以计算大多数传统电法装置的响应,它是以扰动位的计算和Fredholm积分方程的求解为基础的。该模拟程序可用来确定钻孔附近不同形状和位置的矿体对井-井单极-单极排列下视电阻率的典型响应。为了得到综合图象,将结果画在一个平面上,这里X轴代表观测井中的深度,Y轴代表供电井中的深度。这种表示似乎对这里所检验的电极排列特别方便。对简单几何模型的详细研究得到了一些解释规则,这些规则已用于在法国SALAU矿区野外测量的定量解释中。然后,用本程序通过对相应模型的直接计算来检验和证实这种解释。
Well-well measurements can be used to delineate the extension of a conductor without regard to whether the conductor is penetrated by a borehole. This electrical method can be used to optimize drilling and delineation structures. Although there are no special problems with the operation of the well-well instrument, the explanation of the results has proven to be difficult. We have devised a program for calculating the potential generated by direct current in a non-uniform half-space (a three-dimensional body buried in a layered formation). The program can calculate the response of most of the traditional electrical method device, it is based on the calculation of the disturbance and Fredholm integral equation. This simulation program can be used to determine the typical response of apparent ore body resistivity to well-well monopole-monopolar alignment of different shapes and locations near the borehole. In order to obtain a composite image, the results are plotted on a plane where the X-axis represents the depth in the observation well and the Y-axis represents the depth in the power supply well. This representation seems to be particularly convenient for the arrangement of electrodes examined here. Detailed studies of simple geometric models provide some rules of interpretation that have been used in the quantitative interpretation of field measurements in the SALAU mining area in France. Then, use this program to verify and confirm this interpretation by direct calculation of the corresponding model.