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常规地震观测系统设计方法基于地下水平层 状介质的假设,通常不能适应复杂构造情况。我们 从控制照明的思想出发,提出了一种面向目标成像 的地震观测系统设计方法,该方法需要一个由初步 地震解释得到的速度模型。利用单程傅立叶有限差 分波场传播算子将目标层的平面源延拓到地表,通 过分析从目标层延拓到地表的波场能量的分布,可 以确定目标层成像所需要的炮点或者检波点的位置。 利用SEG-EAGE盐丘模型数值试算结果表明,该方法 用于设计面向目标成像的特定地震采集系统。
Conventional seismic observation system design methods are often not adapted to complex tectonics based on the assumption of a horizontal layered media. Based on the idea of controlling lighting, we propose a seismic imaging system-oriented design method of seismic observation system, which requires a velocity model derived from preliminary seismic interpretation. By using the one-way Fourier finite difference wavefield propagation operator, the plane source of the target layer is extended to the surface. By analyzing the distribution of the wavefield energy extending from the target layer to the surface, the shot or detection point required for the target layer imaging can be determined s position. Numerical experiments with SEG-EAGE salt dome model show that this method is suitable for the design of seismic acquisition system for target-oriented imaging.