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最近在美国墨西哥湾Teal South工区做的3D×4C地震勘探,对振幅/偏移距(AVO)分析进行了研究,其中一些方法在常规海洋浮缆勘探中不常见到。有些勘探与海底接收装置的稀少网格有关。因此,在着手进行AVO分析之前,很有必要论证一下勘探能否充分地取得界面AVO响应数据,以及能否断定使用最好的勘探方法来处理保存下来的响应。方位角和偏移距分布在共中心点的而元内将受到限制,井且显示其空间明显的改变。试验验证了常规AVO处理结果,并显示在叠前偏移之后也能进行较好的AVO分析。
A recent 3D × 4C seismic survey conducted at the Teal South work area in the US Gulf of Mexico studied amplitude / offset (AVO) analysis, some of which are not commonly found in conventional seafloor surveys. Some exploration is related to the sparse grid of subsea receivers. Therefore, before embarking on an AVO analysis, it is necessary to demonstrate that exploration can fully capture the interface AVO response data and whether it can be concluded that best-of-breed exploration methods are used to handle the saved responses. Azimuths and offsets are distributed at the center of the co-ordinates and will be limited within the cell and show significant spatial changes. The experiment validated the results of conventional AVO processing and showed that good AVO analysis was also possible after prestack migration.