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3-D测量的采集方式通常对倾角时差校正(DMO)或3-D叠前偏移的结果具有严重的影响。当输入道的空间分布不规则时,从DMO或叠前偏移中得到的结果就会受到人为假象的破坏。在许多情况下,从偏移剖面上可以看到采集方式的痕迹并可能导致错误的解释。在3-D叠前偏移或3-D DMO之后,这种现象也会对振幅随炮检距的变化(AVO)分析实施的可行性产生非常严重的影响,并且还会影响速度分析。我们提出一种提高偏移和DMO能力的简单方案,它能使采集假象减少到最小。
The acquisition of 3-D measurements often has a serious impact on the results of dip-time-difference correction (DMO) or 3-D prestack migration. When the spatial distribution of input channels is irregular, the results obtained from the DMO or prestack migration are subject to artifacts. In many cases traces of the acquisition mode can be seen from the offset profile and can lead to erroneous interpretations. After 3-D prestack migration or 3-D DMO, this phenomenon can also have a very serious impact on the feasibility of amplitude-dependent offsetting (AVO) analysis and can also affect the velocity analysis. We propose a simple solution to improve the ability of offset and DMO, which can minimize the collection artifacts.