南阳方程的改进与发展

由于含泥质地层中的沁抽矿物成分在纵向上或横向上变化都比较大，即使地层水矿化度相同，在浅、中深及深层中，泥质对视电阻率的影响不同，甚至差异较大，本文给出改进的南阳方程，能较好地解决这一问题，所需参数不多，方法简便，适应性强，处理的结果可靠，在砂泥岩剖面中，在参数完全相同的情况下，与阿尔奇公式处理的结果相比较，南阳方程处理的结果更符合实际情况。

The Evolution of Nanyang Equation

Since the argillaceous mineral compositions of shaly formation are changingvertically or horizontally,the shale contents have different influence on apparent resistivities in shallow,middle-deep and deep formations even though the formationwater salinities are the same.The above problem can be resolved through the improved Nanyang equation which needs few parameters as input.It is adaptable,reliable and easy to use.It shows that the processing result with Nanyang equation isbetter coincident with the reality of the formation than that with Archie equationfor shaly sand profile under the condition that the parameters used in processing arethe same.