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一、层面划分以往,用视电阻率梯度法划分岩层界面时,常因曲线不规则或异常不明显而难以准确划分;但如用简单的平衡电桥电路的接地电阻梯度法,则异常明显,尤其对薄层也能较好地划分。不过此法不能确定地层名称。但如若此法与视电阻率梯度法配合使用,则效果很好,其原理线路如图1所示。在曲线尖端处各自向外侧移0.5A_1A_2即为被探测岩层的上下界面(图2)。
First, the level of division In the past, the apparent resistivity gradient method for the division of rock formation interface, often due to irregular or irregular curve is not obvious and difficult to accurately divided; but with a simple balanced bridge circuit grounding resistance gradient method, the exception is obvious, In particular, the thin layer can also be better divided. However, this method can not determine the name of the formation. However, if this method and the apparent resistivity gradient method with the use of good results, the principle of the circuit shown in Figure 1. At the tip of the curve, they are each shifted outward by 0.5A_1A_2, which is the upper and lower interface of the rock to be detected (Figure 2).