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1·Sied-hole reference for estimating the gradient anomaly of apparent resistivity is put forward on the basis of literature 3.

本文在文献3的基础上，提出了一种计算视电阻率梯度异常的旁井参照法。

2·Sied-hole reference for estimating the gradient anomaly of apparent resistivity is put forward on the basis of literature 3. It is the major part of trielectrode gradient measurernent technique.

本文在文献3的基础上，提出了一种计算视电阻率梯度异常的旁井参照法。