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高密度电法能通过研究地下介质体的电阻率差异进行二维地电断面测量,其成像效果和工作效率受到具体的布设方法的影响。本文通过正演数值模型和实际探测资料,针对管道高阻目标体,探究了横纵向上不同排列方式的异常响应。由于高密度电法在纵向上的异常会对下方产生影响,因此高密度电法的横向分辨率一般高于纵向分辨率,而偶极排列在横向异常的分辨上又优于温纳排列。在此基础上,电极距的缩小明显提高了分辨率,故在时间资源比较匮乏的案例下,应优先进行尽可能小的电极距的偶极排列数据收集。
The high-density electrical method can study the 2D resistivity difference of the subterranean medium to measure the 2-D geoelectric section, and its imaging effect and work efficiency are affected by the specific layout method. In this paper, through the forward numerical model and the actual exploration data, the abnormal response of different arrangement in the horizontal and vertical directions is explored for the high resistance target. Because of the influence of high-density electrical method in the vertical direction, the horizontal resolution of the high-density electrical method is generally higher than that of the vertical resolution, and the dipole arrangement is better than that of the Wien-Na array in the resolution of lateral abnormalities. On this basis, the narrowing of the electrode distance obviously improves the resolution. Therefore, in case of lack of time and resources, dipole arrangement data with the smallest possible electrode distance should be prioritized.