关于非无穷远三极剖面法的若干新认识

New knowledge of non-infinite three-electrode profiling

本文基于文献1的研究工作，进一步论述了非无穷远三极剖面法的探边机理;分析了影响视电阻车（ps）异常幅值和异常极值点位置的因素;并在深入研究视电阻率ps异常宽度与油气藏埋藏深度之间的内在联系的基础上，提出了一种关于计算油气藏埋藏深度的经验切线法。从而指出，非无穷远三极剖面法不仅能够有效地圈定出油气藏的边界范围，而且还能实现对油气藏埋藏深度的计算。

The boundary exploration principle of non-infinite three-electrode profiling is demonstrated further on the basis of literature 1. The factors influencing both abnormal amplitude of apparent resistivity and location of abnormal extreme point are analysed in detail. Empirical tangent method for reservoir depth estimation has been put forward by studying a relation between apparent-resistivity abnomal width and oil reservoir depth. It is pointed out that non-infinite three-electrode profiling is able to map reservoir boundary and to estimate reservoir depth.