孙辉^1,2,3,,
张剑锋^1,2,3,,
1. 中国科学院地质与地球物理研究所, 北京 100029
2. 地球科学研究院, 北京 100029
3. 中国科学院大学, 北京 100049

基金项目: 国家自然科学基金（41574135和41330316）和国家科技重大专项（2017ZX05008-007）资助


详细信息

作者简介: 孙辉, 男, 1992年生, 博士, 研究方向为复杂介质地震波正演模拟.E-mail:sh39o@mail.ustc.edu.cn

通讯作者: 张剑锋, 男, 1963年生, 教授, 研究方向为地震波数值模拟, 地震偏移成像, 地震波场重建及地震资料处理等.E-mail:zhangjf@mail.iggcas.ac.cn

中图分类号: P631

收稿日期:2019-02-11
修回日期:2019-08-10
上线日期:2019-09-05

3D acoustic wave modeling based on irregular grid method with double-mesh implementation

SUN Hui^1,2,3,,
ZHANG JianFeng^1,2,3,,
1. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2. Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China
3. University of Chinese Academy of Sciences, Beijing 100049, China


More Information

Corresponding author: ZHANG JianFeng,E-mail:zhangjf@mail.iggcas.ac.cn

MSC: P631

--> Received Date: 11 February 2019
Revised Date: 10 August 2019
Available Online: 05 September 2019


摘要
摘要:三维声波方程相比二维声波方程能够更好的模拟三维空间的地震波传播，模拟标量近似下的弹性波在三维复杂介质的传播过程.基于非规则网格的正演模拟方法的格子法可以处理很好的刻画起伏地表、速度间断面等复杂构造，但是这类方法需要大量的几何描述来描述网格.本文提出了三维六面体双重网格的格子法来模拟声波方程，一方面该方法继承了格子法能够灵活处理自由表面和速度间断面的特性.另一方面，该方法通过双重网格的实现极大的减少了几何描述文件的大小，可以最大的实现GPU加速，实现粗粒度并行，在节省了几何描述空间的同时达到了很高的加速比.
关键词: 双重网格/
格子法/
三维声波方程/
正演模拟

Abstract:3D acoustic wave equation is more suitable for modelling the seismic wave when compared with the acoustic wave equation in 2D,especially for modelling 3D complex geological settings. Though the irregular grid-based grid method can modelling the topography problem and high velocity discontinuities,it still needs a geometrical file describing the grid setting,which costs a great amount of storage spaces. In this paper,we propose a 3D acoustic wave modelling method based on irregular grid method with a double-mesh implementation to solve the problem above. On the one hand,the proposed method inherits the advantages of the grid method,handling the topography and high velocity discontinuities. On the other hand,it greatly reduces the consuming of storing the geometrical files by the double-mesh implementation. As a result,the proposed method reduces the storage consuming and meanwhile achieves a GPU acceleration.
Key words:Double-mesh/
Grid method/
3D acoustic wave equation/
Seismic modelling



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