全局约束反演多道吸收补偿方法

基于反演的反Q滤波是目前较为常用的一种地震波吸收补偿方法，该方法通过将L₂范数正则化作为纵向约束以提高反演结果的稳定性，但噪声会降低反演的准确性和稳定性。为此，提出了一种基于反演的全局约束多道吸收补偿方法。该方法首先需要根据地震信号的可预测性计算信号预测误差算子，然后将其作为横向约束算子加入到纵向约束单道吸收补偿系统，由单道吸收补偿系统拓展为多道吸收补偿系统。基于反演的全局约束多道吸收补偿方法具有更强的抗噪性和稳定性，可有效减小补偿对于高频噪声的放大效应，提高地震资料的分辨率和信噪比，使地震同相轴横向上更连续。模型数据和实际数据实验结果证实了方法的有效性。

Multi-channel absorption compensation method based on global constrained inversion

Inverse Q filtering based on inversion is a commonly used method of seismic wave absorption compensation. This method improves the stability of inversion by using L₂ norm regularization as a vertical constraint. However，it is easily disturbed by noises, and noises would reduce the accuracy and stability of inversion. This paper proposes a global-constrained absorption compensation me-thod based on inversion. The method first calculates an error operator to predict seismic signals, and then adds it as a lateral-constrained operator to the vertical-constrained absorption compensation system. This expends the single-trace approach to a multi-trace algorithm. The inversion-based global-constrained absorption compensation method has stronger noise suppresion and stability, and it can effectively reduce the amplification effect of compensation on high-frequency noises, improve the seismic resolution and preserve the spatial conti-nuity of seismic event. Tests on model data and actual data have confirmed the effectiveness of this method.