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将自然电位测井中的点电极改成环电极,可以有效地提高测井的分层能力。本文对环电极及环电极与纵向电位梯度的关系进行了理论分析和计算,提出了纵向电位梯度增大比与分层能力的线性关系,并用井内自然电流场的模拟实验对理论结果进行了验证,从而确立了环自然电位测井提高分层能力的理论依据,以及环电极半径的选取原则。
Changing the point electrode in natural potential logging into a ring electrode can effectively improve the logging delamination ability. In this paper, the relationship between the ring electrode and the ring electrode and the longitudinal potential gradient has been theoretically analyzed and calculated. The linear relationship between the vertical potential gradient and the stratification ability has been proposed. The theoretical results have also been validated by simulation experiments of natural current in the well , So as to establish the theoretical basis for improving the delamination ability of ring natural potential well logging and the selection principle of ring electrode radius.