• 应用地球物理学Ⅱ(海洋、工程、环境、仪器等) •

### 跨孔电阻率法装置灵敏度分析及分辨率讨论

1. 成都理工大学地球物理学院,成都 610059
• 收稿日期:2017-08-11 修回日期:2018-02-13 出版日期:2018-04-20 发布日期:2018-07-18

### Analysis of sensitivity of arrays and resolution discussion of cross-hole resistivity method

Lin-cheng JIANG(),Hong-yue XIAO,Shang-jian DING,Yi JIA,Qiang WU

1. Institute of Geophysics, Chengdu University of Technology, Chengdu 610059, China
• Received:2017-08-11 Revised:2018-02-13 Online:2018-04-20 Published:2018-07-18

Abstract:

As the measurement area of cross-hole resistivity method is between the two holes, the measurement arrays, the sensitivity and the resolution are quite different from the common ground resistivity method, and the factors that affect their resolution are also more than it. Sensitivity range and resolution varies according to the arrays of cross-hole resistivity method. The sensitivity of each arrays is analyzed by the Fréchet derivative for the pole-pole array, dipole-pole array and dipole-dipole array of the cross-hole resistivity method, and the array suitable for cross-hole detection is determined. On this basis, established different models, and the numerical simulation of the dipole-dipole array was carried out as an exemplification. Combined with the sensitivity profile, the horizontal and vertical resolution and influencing factors of the array were discussed. It is confirmed that the sensitivity is related to the resolution, Sensitivity contours of the profile of the density, shape, positive and negative range of the resolution has a direct impact. In the study of the cross-hole resistivity method, the different shapes of the different abnormalities in the inversion can be classified and analyzed. This provides the theoretical and experimental basis and guidance for improving the efficiency of on-site exploration, enhancing the analysis and interpretation of the data.