Although amplitude versus angle (AVA) analysis is currently performed on unmigrated prestack data, there is increasing evidence that more reliable and better resolved AVA attributes can be obtained by inversion after prestack migration, either in time (Mosher et al., 1996) or in depth (Beydoun et al., 1993)―even when considering flat structures. In principle at least, the use of prestack depth migration before inversion appears a better option because it involves a less approximate description of wave propagation and provides better results in terms of location, resolution, and accuracy of AVA targets.
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机译:尽管目前正在对未偏移的叠前数据进行幅度与角度(AVA)分析,但越来越多的证据表明,通过叠前偏移后的反演可以及时(Mosher等人,1996年)或在深度(Beydoun et al。,1993)-即使考虑平面结构。至少原则上,在反演之前使用叠前深度偏移似乎是一个更好的选择,因为它涉及的波传播描述较不近似,并且在AVA目标的位置,分辨率和精度方面提供了更好的结果。
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