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确定煤层顶底板的稳定性对煤层的开发具有重要的指导作用。波阻抗是重要的岩石物理参数,与含煤地层有很好的对应性,同时反映了地层单元空间展布及上、下地层差异性。可直接与钻井对比进行储层岩性解释和物性分析。对鄂尔多斯某区井田三维地震资料进行波阻抗反演,提取煤层顶底板的波阻抗信息,宏观上确定了煤层顶板不稳定区域。
Determining the stability of roof and floor of coal seam plays an important guiding role in the development of coal seam. Wave impedance is an important petrophysical parameter, which has good correspondence with coal-bearing strata and reflects the spatial distribution of stratigraphic units and the difference of upper and lower formation. Reservoir lithology interpretation and physical property analysis can be directly compared with drilling. Wave impedance inversion of 3D seismic data in a minefield in Ordos area is used to extract the wave impedance information of roof and floor of coal seam, and the unsteady area of roof of coal seam is determined macroscopically.