稳定波束法地震波场模拟技术

Modeling of seismic wave field by stable wave beam

1. 胜利油田物探研究院,山东东营257022;2. 青岛海洋大学,山东青岛266000

1. Geophysical Research Institute of Shengli Oilfield,Dongying 257022, China;2. Ocean University of Qingdao,Qingdao266000, China

稳定波束法地震波场模拟技术将波动理论与射线理论有机的结合起来,是一项新的地震波场模拟技术,该技术不仅很好的利用线性元模型解决了“两点射线追踪”的难题,而且波场合成结果包含了精确的边缘绕射波场。介绍了稳定波束法地震波场模拟技术的基本原理,并利用模型模拟实验方法对该项技术进行了验证,实验结果证明稳定波束法地震波场模拟技术与传统的射线理论方法相比绕射波模拟精度完全达到了要求,与传统的波动理论方法相比计算速度快,是一种适合于复杂地质模型的地震波场模拟技术。在实际生产中利用该项技术对处理流程与处理参数进行了验证处理,从而提高了处理流程与处理方法的可靠性。

Modeling of seismic wavefield by stable wave beam, which combines organically wave theory with ray theory, is a new technique of seismic wavefield simulation. This technique can effectively solve the problem of ray tracing between two spots with linear elementmodel. Its resulting wavefield contains precise edge diffraction wavefield. This paper presents principles of themethod.model tests show that themethod canmeet the precision requirement of diffraction simulation. Themethod is faster in computation comparing with traditional wave theory basedmethods and is suitable formodeling of seismic wavefield in complex geologic settings. The results from real data support themodel test.