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由于接近地表,浅深度(小于30米)电位电极系测井测得的视电阻率超过均匀介质层电阻率200％长电位电测井比短电位电极测井的畸变更剧烈。本文用加利福尼亚南部填工区的三个例子说明了该畸变问题。对由两个点源电极或一个点源和一个有限长度线源电极组成的测井设备而言,畸变的模式是相似的。前一种电极排列一般被认为是后一种电极排列的
As the resistivity near the surface and shallow depth (less than 30 meters) of the potential electrode system measured more than 200% of the resistivity of the uniform medium layer, the longitude potential logging is more severe than the short potential electrode logging. This article illustrates the problem of distortion using three examples of fill-in areas in southern California. The pattern of distortion is similar for a logging tool consisting of two point source electrodes or a point source and a finite length source electrode. The former electrode arrangement is generally considered as the latter electrode arrangement