论文详情
品质因子Q是地下介质的重要岩性参量,是反映地层对地震波的吸收程度的重要参数。频率域属性组合法是新提出的一种地层Q值提取方法,有较严格的理论推导。采用理论模型数据验证了属性组合法(一阶式和二阶式)提取地层Q值的可靠性。通过测试不同衰减模型、震源子波及频带宽度,对比了谱比法、质心法和属性组合法反演Q值的精度，分析了可能的影响因素。对海上地震资料用二阶式提取的Q值分布进行反Q滤波处理，取得较好的实际应用效果。
The quality factor Q is the main parameter measuring the stratum absorption and attenuation characteristics.Attribute combination method in frequency domain is a new way to estimate Q value,which has a rigorous theoretical derivation.Model analysis shows the reliability of Q value inversion with attribute combination method (first-order formula and second-order formula).We contrast the precision of three methods (spectral ratio method,centroid calculation method and attribute combination method) under different conditions of different source wavelets,attenuation models and frequency bandwidths and analyze the potential impact factors.The inverse Q filtering to actual off-shore seismic data was processed by Q value distribution extracted with second-order formula,which verified the practical application effect of attribute combination method.