波阻抗约束反演技术预测煤层厚度

Exploration logging-constrained inversion technique predicting coal-thickness

用测井资料结合三维地震数据体及其解释成果进行多井约束下的波阻抗反演(稀疏脉冲反演结合地震约束的测井曲线反演)来预测煤层厚度,是通过层位标定确定煤层所对应的波阻抗层,然后提取该波阻抗层的厚度并与钻孔见煤点处的煤层厚度进行拟合匹配,最终得到三维地震测区的煤层厚度分布规律。该法对煤层厚度预测是一种新的尝试。

logging data in combination with 3D seismic data body and its interpretation result, was applied to make impedance inversion under constraint of multi-well （ logging curve inversion in combination of sparse pulse inversion with seismic constraint）. Distribution law of the coal seam thickness for 3D seismic survey area is obtained finally by detennining the wave impedance layer corresponding to the coal seam with horizon labeling, and fitting and matching of the thickness of the wave impedance extracted with the thickness of the coal seam at the point meeting the coal for the horehole.