基于Marmousi模型的CFS-NPML分数阶粘声波正演模拟  

CFS-NPML fractional order based on Marmousi model Viscoacoustic forward modeling

作　　者：廖万平 王兴建 李卿武[1] 王崇名 张俊杰 LIAO Wanping;WANG Xingjian;LI Qingwu;WANG Chongming;ZHANG Junjie(School of Geophysics,Chengdu University of Technology,Chengdu 610059,China;State Key Laboratory of oil &Gas Reservoir Geology and Exploitation,ChengduUniversity of Technology, Chengdu 610059,China)

机构地区：[1]成都理工大学地球物理学院,成都610059 [2]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059

出　　处：《物探化探计算技术》2021年第6期683-689,共7页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金(42074163)。

摘　　要：正演模拟作为连接模型和实际地震勘探资料的纽带,对认识复杂介质中地震波传播规律和油气藏开发方案的可行性研究具有十分重要的意义。实际应用中却时常存在边界条件对高角度入射波/掠射波以及瞬逝波吸收效果的不理想等问题,导致虚假反射淹没有效信息,降低模拟数据的信噪比。对此,这里实现了基于Marmousi模型的非分裂复频移完全匹配层(Unsplit complex frequency shifted perfectly matched layer,CFS-NPML)分数阶粘声波正演模拟,结果表明:与完全匹配层(PML)吸收边界条件相比,在接近真实地层情况下CFS-NPML分数阶粘性声波数值正演模拟中更具鲁棒性、可行性、并且能够有效压制虚假反射。As a link between the model and the actual seismic exploration data forward simulation is of great significance to understand the seismic wave propagation in a complex media and to investigate the feasibility of reservoir development scheme.In practical applications,however,there are often problems such as unsatisfactory absorption effect of boundary conditions on high Angle incident wave/grazing wave and transient wave,which results in false reflection flooding effective information and reducing SNR of simulated data.To this,this paper implements the Marmousi model without divide the complex frequency shift of perfectly matched layer(Unsplit complex frequency shifted perfectly matched layer,CFS-NPML)fractional stick acoustic forward modeling,the results show that with the perfectly matched layer(PML)absorbing boundary condition,compared to the real formation near the CFS-NPML fractional viscosity acoustic numerical forward modeling is more robustness,feasibility,and can effectively suppress the false reflection.

关 键 词：MARMOUSI模型 CFS-NPML 分数阶粘声波 正演模拟 虚假反射 

分 类 号：P631.4[天文地球—地质矿产勘探]