【摘要】 煤层顶板砂岩水害威胁矿井生产安全，含水饱和度测井解释是评估砂岩富水性的关键。为此，该文依据WYLLIE时间平均方程和LEE孔隙度近似计算公式，在顶板饱水砂岩段测井曲线响应约束下，采用贝叶斯方法优选G、n关键参数，构建适配研究区地质条件的顶板砂岩含水饱和度测井解释模板，并将其应用于恒源煤矿上石盒子组顶板砂岩的含水饱和度解译中。结果表明：基于WYLLIE-LEE方程的顶板砂岩含水饱和度测井解释方法高度依赖G、n值的选取，采用合适的G、n参数解释的含水饱和度曲线与传统的西门度公式计算结果高度一致，决定系数达0.7以上。相比西门度公式，该方法只需要输入声波测井与密度测井而不需要引入各类复杂的中间参数，更加符合当前煤田测井工程现状。研究成果为煤层顶板砂岩含水层识别与富水性评价提供一种新思路。更多还原

【Abstract】 The water hazard posed by the sandstone of the coal seam roof threatens mine production safety, and well-log interpretation of water saturation is crucial for evaluating the water-bearing capacity of sandstone. To address this, this study establishes a well-log interpretation template for water saturation in roof sandstones by optimizing key parameters G and n using the Bayesian method, based on the WYLLIE time-average equation and LEE’s porosity approximation formula. The method is constrained by well-log responses from the water-saturated sandstone section of the roof. The developed template is applied to interpret the water saturation of the roof sandstone in the Shangshihezi Formation at Hengyuan Coal Mine. Results show that the interpretation method based on the WYLLIELEE equation is highly dependent on the selection of G and n. When appropriate G and n parameters are used, the interpreted water saturation curve closely aligns with the traditional Simandoux equation results, achieving a coefficient of determination greater than 0.7. Compared to the Simandoux equation, this method requires only acoustic and density logs without the need for complex intermediate parameters, making it more suitable for current coalfield logging applications. The findings provide a new approach for identifying water-bearing sandstone layers and evaluating water abundance in coal roof sandstones.更多还原