利用煤田测井参数解释煤岩层储气特征

煤田测井曲线中携带着丰富的地质信息,不同属性的测井参数与煤、岩层物理力学性质、富水储气等特征均具有一定的相关性。通过对测井曲线进行数字化和标准化处理,根据煤层含气量与天然放射性参数呈负相关关系,与视电阻率、人工放射性参数呈正相关关系,确立天然放射性、视电阻率及人工放射性测井3种参数间的复合参数,进而构建复合参数与含气量之间的关系,并对研究区1煤层进行了煤层含气量计算与评价。结果表明,利用本文的方法预测的煤层含气量分布与实际揭露情况较吻合。

Exquisite interpretation on gas storage characteristic of coal and rock stratum by logging parameters of coal field

Coalfield logging curve carries a great amount of geological information, and certain correlation exits among logging parameters, mechamical properties, the characteristics of gas storage and watery property of seam coal.Through the process of digitalization and standardization of logging curves, and based on negative correlation between coal-bed gas content and the parameters of natural radioactivity, and postive correlation between apparent resistivity and parameters of artificial resistivity, we have confirmed the combined parameters based on natural radioactivity, apparent resistivity, artificial resistivity, then built the relation between the gas content and the composite parameters, what's more we calculated and evaluated the coal-bed gas content of a seam in the study area with the defined parameters. The final result showed that the predicted distribution of coal-bed gas content better accorded with actual discovered distribution of coal-bed gas content.