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转换波四参数速度分析方法在k71地区的应用

机译:转换波四参数速度分析方法在k71地区的应用

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3-D converted-wave data were acquired using digital MEMS (micro-electromechanical system) three component (3C) sensors in the alternating sand and shale sequence in the overburden of the Shengli Ken-71 area. This gives rise to serious non-hyperbolic moveout effects in the converted-wave data due to both the asymmetrical ray path and anisotropic effects. Conventional velocity analysis and moveout correction based on isotropic methods do not flatten reflections events. Here, we use a four-parameter theory to evaluate these effects and process the data. These four parameters include the PS converted wave stacking velocity (VC2), the vertical velocity ratio (y0), the effective velocity ratio (yeff), and the anisotropy parameter (xeff). The method utilizes the moveout information at different offsets to estimate the different parameters and ensures that the events are properly aligned for stacking. As a result, this four-parameter theory leads to an improvement in imaging quality and correlation between the P-waves and converted-waves.
机译:使用数字MEMS(微机电系统)在胜利肯-71区域的覆盖层中使用数字MEMS(微机电系统)三个组分(3C)传感器来获取三维转换波数据。由于不对称射线路径和各向异性效应,这引起了转换波数据中的严重非双曲型效果。基于各向同性方法的传统速度分析和偏移校正不平整反射事件。在这里,我们使用四个参数理论来评估这些效果并处理数据。这四个参数包括PS转换波堆叠速度(VC2),垂直速度比(Y0),有效速度比(yeff)和各向异性参数(Xeff)。该方法利用不同偏移的MoveOut信息来估计不同的参数并确保事件正确对齐以堆叠。结果,该四个参数理论导致了对P波和转换波之间的成像质量和相关性的提高。

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