对比图4和图5可知，当没有半空间影响的时候，两个孔中同一深度的信号强度

Comparing Figure 4 and Figure 5, it can be seen that when there is no half-space effect, the signal intensity at the same depth in the two holes is equal. However, when there is a half-space effect, when the depth of the receiving point is less than 20m, the signal in the shallow layer of the other hole is obvious. It is different from the uniform stratum. As depth increases, the half-space effect becomes weaker and weaker. In order to analyze the relationship between the half-space effect and depth, the signal envelopes in Figures 4 and 5 were extracted, and the results for 100Ω·m formation and different hole spacing were calculated, as shown in Figures 6 and 7.

Comparing Figures 4 and 5, it can be seen that when there is no half space effect, the signal intensity at the same depth in two holes is equal. However, when there is half space effect, when the depth of the receiving point is less than 20m, the signal in the shallow layer in the other hole is significantly different from that in a uniform formation. As the depth increases, the half space effect becomes weaker and weaker. In order to analyze the relationship between half space effect and depth, the signal envelope in Figures 4 and 5 was extracted, and the results of 100 Ω· m formation and different hole spacing were calculated, as shown in Figures 6 and 7.

By comparing Figure 4 and Figure 5, it can be seen that when there is no half-space influence, the signal intensity of the same depth in the two holes is equal, while when there is half-space influence, when the depth of the receiving point is less than 20m, the signal of the shallow layer in the other hole is obviously different from the uniform formation. With the increase of depth, the half-space effect becomes weaker and weaker. In order to analyze the relationship between half-space effect and depth, the signal envelopes in Figure 4 and Figure 5 are extracted, and the results of 100Ω·m stratum and different hole spacing are calculated, as shown in Figure 6 and Figure 7.