Kirchhoff modeling, inversion for reflectivity, and subsurface illumination
Kirchhoff modeling, inversion for reflectivity, and subsurface illumination
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DOI：
10.1190/1.1444812
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发表时间：
2000-07
期刊：
影响因子：
3.3
通讯作者：
B. Duquet;K. Marfurt;J. Dellinger
中科院分区：
文献类型：
--
作者：
B. Duquet;K. Marfurt;J. Dellinger
由于其计算效率高，叠前克希霍夫深度偏移是目前二维和三维地下深度成像中最流行的算法之一。然而，基尔霍夫算法在其典型实施中产生的结果不太理想，在复杂的地层中，可能发生从表面到给定图像点的多路径，以及在快速碳酸盐岩，盐或火山岩下，射线理论能量无法穿透以照亮下面的较慢速度沉积物。为了评估拟议地震采集程序的可能有效性，我们可以进行正演模拟研究，但这可能很昂贵。我们展示了如何克希霍夫建模可以被定义为克希霍夫偏移的数学转置。由此产生的基尔霍夫建模算法具有与基尔霍夫偏移相同的低计算成本，并且与昂贵的全声波或弹性波动方程方法不同，仅对基尔霍夫偏移可以成像的同相轴进行建模。Kirchhoff模型也是...
Because of its computational efficiency, prestack Kirchhoff depth migration is currently one of the most popular algorithms used in 2-D and 3-D subsurface depth imaging. Nevertheless, Kirchhoff algorithms in their typical implementation produce less than ideal results in complex terranes where multipathing from the surface to a given image point may occur, and beneath fast carbonates, salt, or volcanics through which ray‐theoretical energy cannot penetrate to illuminate underlying slower‐velocity sediments. To evaluate the likely effectiveness of a proposed seismic‐acquisition program, we could perform a forward‐modeling study, but this can be expensive. We show how Kirchhoff modeling can be defined as the mathematical transpose of Kirchhoff migration. The resulting Kirchhoff modeling algorithm has the same low computational cost as Kirchhoff migration and, unlike expensive full acoustic or elastic wave‐equation methods, only models the events that Kirchhoff migration can image. Kirchhoff modeling is also...