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渭北石炭二叠纪煤田煤层顶板横向非均质性强,依靠钻探所得煤层顶板岩性误差较大.地震资料具有较高的纵向、横向分辨率,利用地震资料可以提高煤层顶板岩性预测精度.本文采用序贯指示模拟方法进行煤层顶板岩性预测.通过分析煤层顶板岩性资料,利用数据空间变异性特征和相应的地震属性求取变差函数,将井点资料作为硬数据,地震数据作为软约束进行煤层顶板岩性预测.综合运用地质资料、地震资料,为煤层顶板岩性预测提供了一种有效的方法.
The top coal seam roof of Weibei Carboniferous Permian Coalfield has strong lateral heterogeneity and the lithology error of top coal seam is higher than that of drilling.The seismic data has high vertical and horizontal resolution.The seismic data can improve the prediction accuracy of rock roof lithology In this paper, the sequential indicator simulation method is used to predict the lithology of coal seam roof.Based on the analysis of roof lithology data, the variogram is obtained by using the spatial variability of seismic data and the corresponding seismic attributes, and the well point data are used as hard data, seismic data As a soft constraint to predict lithology of roof of coal seam.Using geological data and seismic data synthetically, it provides an effective method for lithologic prediction of coal seam roof.