通过建立煤层裂隙、含气性等与其弹性参数关系，进一步理清了瓦斯富集与储层弹性参数变化量之间的内在联系——煤层瓦斯含量与煤层速度、密度呈现负相关特征。以典型的煤矿采区实测数据为基础，计算了5个煤层弹性参数随煤层中瓦斯的吸附量变化关系，结果表明：煤层中瓦斯含量与密度呈现出负相关性；与密度变化量、剪切模量变化量、拉梅常数变化量及AVO检测因子4个参数呈现正相关关系。在三维地震研究区采用与瓦斯含量呈正相关的4个弹性参数对瓦斯富集区分别进行了预测。引入综合评价因子，建立其与4种岩性反演结果相关的一次线性函数，并绘制4弹性参数综合预测瓦斯富集区成果图，达到预测煤层瓦斯富集区的目的。%Based on relationship between coal seam fissure, gas-bearing property and elastic parameters, sorted out further internal log⁃ic between gas enrichment and coal reservoir elastic parameter variation—coal seam gas content and velocity, density present negative correlation features. On the basis of typical coalmine winning district measured data, computed variation of 5 coal seam elastic parame⁃ters along with the adsorbance variation. The result has shown that coal seam gas content and density is negatively correlated;with 4 pa⁃rameters of density, shear modulus, Lame constant variations and AVO detection factors present positive correlation. In 3D seismic prospecting study area, using 4 elastic parameters positively correlated with gas content carried out gas enrichment area prediction re⁃spectively. Introduced factors of comprehensive assessment, established 4 lithologic inversion results one-off correlation function, and plotted 4 elastic parameters comprehensively predicted gas enrichment area result map, and finished with comprehensive prediction of coal seam gas enrichment area target.
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