用自然电位曲线计算地层水矿化度的几个问题

本文是根据水文地质和水文测井工作的特点,考察了用自然电位曲线计算地层水矿化度或地层水电阻率的传统方程,提出了适合水文地质工作较高要求的测井计算方法,并认为影响扩散吸附系数Kt的主要因素是溶液的化学成分及其组合比的变化。通过数理统计,总结了不同盐分为主的混合液的α 、b、K_t值,并阐明了它们的物理意义以及如何针对实际工作环境做到合理的取值问题。

PROBLEMS CONCERNING THE CALCULATION OFMINERALIZATION INTENSITY OF STRATA WATER BYMEANS OF SELF-POTENTIAL CURVES

Taking into account the characteristics of hydrogeological and hydrologic logging work, the author has examined the commonlyused equations for calculating mineralization intensity or resistivity of strata water by means of self-potential curves, and then put forward his own calculating method and formula suitable for high-requirement hydrogeological logging work. It is considened that, of quite a few factors affecting diffusion-adsorption coefficient k_t, the variation in chemical composition and combination ratio of the solutions seems to be most important. Through statistical analysis, parameters of a, b, and k, for mixed solutions with different saline compositions are obtained, the physical implications of these parameters are clarified, and the reasonable acquisition of numerical values in practical work is discussed. Finally, the effectiveness of this me-thod is illustrated with the help of practical data and^comparison by diagrams. This also leads to an extension of its application scope.