在井间地震反射处理中通过三维滤波实现波场分离

• 作 者: Peter S.Rowbotham
• 出 处: 石油物探译丛
• 发表日期: 1995年02期
• 关键词: 波场分离 井间地震 次波 地震数据处理 炮点 数据体 反射波 检波点 下行波 直达波

在井间反射地震数据处理中,一次反射波的上、下行波分离,反射波与直达波及其它波型的分离是必要的处理步骤。本文介绍了一种用一步法三维f-k-k 滤波实现波场分离的方法。理想的数据集应当是数据体,其中每一样值由炮点深度、检波点深度及时间坐标确定。滤波处理的效果很好,其原因在于上行一次波、下行一次波和直达波位于f-k-k空间的不同象限

In crosswell seismic data processing, the separation of the reflected waves from the up-and-down waves of a reflected wave and the direct waves and other wave patterns is a necessary processing step. This paper presents a method using one-step three-dimensional f-k-k filter to achieve wavefield separation. The ideal dataset should be a body of data, where each sample is determined by the depth of the shot, the depth of the detector and the time coordinates. The filtering effect is very good, because the up-going primary wave, the down-going primary wave and the direct wave are located in different quadrants of the f-k-k space