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对二维偏移时间资料进行图偏移是一种新方法,其做法是先沿二维测线进行地震偏移,再按垂直于测线的方向进行图偏移,从而得到反映地下地质体的完整三维平面图。除了二维时间和位置修正外,这种处理方法还可以用于二维偏移资料的振幅校正,这种二维偏移资料因垂直于测线方向反射层曲率导致的聚焦、散焦而复杂化。墨西哥湾实例说明图偏移方法如何简化时间构造图以及如何解释异常振幅的变化。
It is a new method to map the data of two-dimensional migration time by performing the seismic migration along the two-dimensional line and then the image migration perpendicular to the direction of the survey line to get the reflection of the underground geological body Complete three-dimensional floor plan. In addition to two-dimensional time and position correction, this processing method can also be used for the amplitude correction of two-dimensional offset data, which is complex due to focusing, defocusing and perpendicularity to the curvature of the reflective layer in the line direction The The Gulf of Mexico example illustrates how the offset method simplifies the time-structure plot and explains how the amplitude of the anomaly changes.