【摘要】 地震数值模拟是地震勘探和地震学的基础。通过对波动方程采用任意阶有限差分近似,进行了数值模拟并合成地震记录,边界条件利用吸收边界和增加衰减带混合使用的方法。计算结果表明高阶有限差分的精度高,边界反射基本上可以达到被完全吸收的效果。对于单炮记录难于模拟复杂的模型的情况下,形成了单次叠加剖面和爆炸反射面的零炮检距剖面,地震剖面更加清晰的反映了复杂构造的信息,更好的实现了对复杂地质模型的正演模拟。更多还原

【Abstract】 The seismic modeling is the foundation of the seismic prospecting and the seismography.arbitrary-order finite difference are used to the wave equation,carried on the numerical modeling and obtained the seismograms.The boundary condition uses the hybrid method of the absorbing boundary and the nonreflecting boundary.The computed result indicated the precision of fourth-order finite difference obviously is higher than second-order difference.The boundary reflection may be absorbed completely.Difficulty with simulates the complex model regarding the single seismic record,the single stack section and the blast reflecting surface zero offset section are presented.The seismic section reflects complex structure information more clearly.The seismic modeling shows the better performance in the case of the complex model更多还原