地电阻率多极距观测中的最佳布极方式

对如何确定地电阻率多极距观测中的最佳布极方式, 包括极距个数和各极距长度的确定进行了研究。 确定最佳布极方式的主要依据是地下各层介质的响应系数随观测极距的变化规律以及采用不同观测极距对反演精度的影响。 以宝坻台为例, 讨论了在电性剖面参数已知的情况下, 如何确定多极距观测中各极距长度。 最后, 利用提出的最佳布极方式确定的装置系统对宝坻台模拟多极距观测资料进行了处理。 结果表明, 用最佳布极方式确定的多极距观测系统可精确计算出地下各层介质的真电阻率变化。

The optimal mode for arranging the electrodes for multi-spacing system in apparent resistivity observation

This paper mainly discusses how to design the optimal mode for arranging the electrodes in multi-spacing system for apparent response observation. The basic foundation in designing the optimal mode for arranging the electrodes is the theory of horizontal layered earth media and related sensitivity coefficients. The accuracy of inversion calculation associated with the choice of different separations should also be considered. Then, taking Baodi station as an example, this paper discussed how to decide the size of each separation in multi-spacing observation for a given station with known electric structure. At last, using the multi-spacing system for apparent resistivity observation decided by the newly designed optimal model for arranging the electrodes, we processed the simulation observation data of the multi-spacing system. From the results it can be seen that variation of the true resistivity of each layer of the underground media can be seen that variation of the true resistivity of each layer of the underground media can be accurately calculated using the multi-spacing system decided by the method put forward in this paper.