AVO反演预处理中的检波器非径向接收能量补偿

Compensation for non-vertical received energy of geophone in preprocessing of AVO inversion

在地震勘探中,当炮检距非零时,检波器接收方向与反射波传播方向的夹角是非零的(即非径向接收),这一非零夹角必将产生能量损失,进而对AVO反演产生显著影响。为此本文根据Snell定律导出非径向损失补偿公式,以模型实例讨论了非径向接收对反射系数的影响,并提出了一种简单而有效的非径向能量损失补偿方法。对比用该方法做非径向损失补偿前后的AVO反演结果,其差异显著,说明本文方法能够明显改善AVO反演的质量。

In seismic exploration, the angles between the geophone receiving directions and reflection propagating directions are non-zero for non-zero offsets (non-vertical receiving), which should make the energy loss and further produce significant influence on AVO inversion. For that reason, the paper induced compensation formula for non-vertical loss based on Snell's law, discussed the influence of non-vertical receiving on reflection coefficients by the cases of model, and presented a simple and effective compensation method for non-vertical energy loss. The AVO inversions of pre- and post-compensation for non-vertical loss implemented by this method demonstrated significant difference between them,and showed the method presented in the paper can greatly improve the quality of AVO inversion.