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真振幅偏移(TA)法也就是克希霍夫加权差分叠加法,利用这种方法能估计复杂的角相关反射系数,这种反射系数在AVO反演中非常重要。利用叠前或叠后克希霍夫偏移及快速格林函数计算程序就可实现真振幅偏移。本文,我们用含超临界角反射(复杂反射系数)的焦散线的单炮共炮检距合成地震记录作验证。真振幅偏移数据的振幅与理论反射系数之间的比较结果表明,角相关反射系数的估计是正确的。
The True Amplitude Offset (TA) method is also known as Kirchhoff’s Weighted Differential Overlay method. This method can estimate the complex angle-dependent reflectance, which is very important in AVO inversion. True amplitude offset can be achieved using pre-stack or post-stack Kirchhoff offset and Fast Green’s function calculations. In this paper, we verify synthetic seismograms using single-shot co-firing of cavern with supercritical angle reflection (complex reflection coefficient). The comparison between the amplitude of the true amplitude offset data and the theoretical reflection coefficient shows that the estimation of the angle-dependent reflection coefficient is correct.