Identification of roof and floor lithology of coal measures strata based on double modes inversion method： a case of
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摘要: 为了提高寺河矿区 " 号煤层顶底板岩性的划分精度"开展了基于波阻抗和自然伽马拟声 波阻抗双模式反演方法识别煤系地层顶底板岩性的研究"对 " 号煤层顶底板岩性进行了测井曲 线响应特征分析"利用分析结果定性找出划分顶底板岩性的两种参数!!!波阻抗和自然伽马# 结合寺河矿区 " 号煤层数据作波阻抗 *自然伽马交会图"定量找出波阻抗与自然伽马的取值范 围# 结果显示"相比于常规波阻抗反演方法"利用波阻抗和自然伽马拟声波阻抗双模式反演方法 能够更准确地划分煤层顶底板岩性#Abstract: In order to improve the classification accuracy of No3 coal seam roof and floor lithology in Sihe mine，the research of wave impedance and gamma ray pseudo acoustic impedance inversion method of dual mode identifications of coal bearing strata lithology of roof and floor were carried out to analysis well logging response characteristics of No3 coal seam roof and floor lithologyThe qualitative analysis results were used to find out the classifications of two kinds of parameters of roof and floor lithology，wave impedance and gamma rayCombined with the data of No3 coal seam in Sihe mining area，wave impedance natural gamma cross plot were used to find out the range of wave impedance and gamma quantitativelyFinally，the roof and floor lithology of common coal seam by wave impedance and natural gamma acoustic impedance double mode inversion method could be classified accuratelyThe results show that compared with the conventional impedance inversion method，the wave impedance and natural gamma pseudo acoustic impedance dual mode inversion method can accurately classify the top and bottom slate of coal seam
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