地震波数值模拟技术发展现状

The review of the numerical modeling of elastic wave motion

地震波场的数值模拟技术有助于认识复杂介质中地震波传播规律,检验各种方法技术的使用范围与应用效果。本文简要讨论了同性介质、异性介质和复杂介质中的地震波传播,指出当前地震波研究的重要课题是发展高效的数值方法,并利用该方法开展复杂介质中的地震波激发和传播,以及强地面运动的研究,为精细的地震危险分析与预测奠定基础。从新方法技术、模拟效果分析和应用等3方面概括有关数值模拟技术的特点,探讨地震波场数值模拟技术的发展现状。

The numerical seismic wave propagation modeling is a powerful tool in the oil exploration, such as data collection, processing, interpretation and so on. It can not only find out the properties of the media, but also check the validity of processing methods, recognize the law of the wave propagation. In all the numerical methods, the finite difference method is more useful with its advantages, such as high precision, flexibility and low cost. In this paper,different conditions of the numerical method are discussed, such as the anisotropy media, the different grid, the boundary condition and the numerical dispersion dumbness.