3D hybrid depth migration and four-way splitting schemes
文献类型：期刊论文
| 作者 | Zhang, Wen-sheng; Zhang, Guan-quan; Wensheng Zhang
|
| 刊名 | JOURNAL OF COMPUTATIONAL MATHEMATICS
 |
| 出版日期 | 2006-07-01 |
| 卷号 | 24期号:4页码:463-474 |
| 关键词 | 3D depth migration multiway splitting data line wavefield computation finite-difference hybrid method |
| ISSN号 | 0254-9409 |
| 英文摘要 | The alternately directional implicit (ADI) scheme is usually used in 3D depth migration. It splits the 3D square-root operator along crossline and inline directions alternately. In this paper, based on the ideal of data line, the four-way splitting schemes and their splitting errors for the finite-difference (FD) method and the hybrid method are investigated. The wavefield extrapolation of four-way splitting scheme is accomplished on a data line and is stable unconditionally. Numerical analysis of splitting errors show that the two-way FD migration have visible numerical anisotropic errors, and that four-way FD migration has much less splitting errors than two-way FD migration has. For the hybrid method, the differences of numerical anisotropic errors between two-way scheme and four-way scheme are small in the case of lower lateral velocity variations. The schemes presented in this paper can be used in 3D post-stack or prestack depth migration. Two numerical calculations of 3D depth migration are completed. One is the four-way FD and hybrid 3D post-stack depth migration for an impulse response, which shows that the anisotropic errors can be eliminated effectively in the cases of constant and variable velocity variations. The other is the 3D shot-profile prestack depth migration for SEG/EAEG benchmark model with two-way hybrid splitting scheme, which presents good imaging results. The Message Passing Interface (MPI) programme based on shot number is adopted. |
| WOS研究方向 | Mathematics |
| 语种 | 英语 |
| WOS记录号 | WOS:000239402800002 |
| 出版者 | VSP BV |
| 源URL | [http://ir.amss.ac.cn/handle/2S8OKBNM/2704]  |
| 专题 | 计算数学与科学工程计算研究所 |
| 通讯作者 | Zhang, Wen-sheng |
| 作者单位 | Chinese Acad Sci, LSEC, ICMSEC, Acad Math & Syst Sci, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Wen-sheng,Zhang, Guan-quan,Wensheng Zhang. 3D hybrid depth migration and four-way splitting schemes[J]. JOURNAL OF COMPUTATIONAL MATHEMATICS,2006,24(4):463-474. |
| APA | Zhang, Wen-sheng,Zhang, Guan-quan,&Wensheng Zhang.(2006).3D hybrid depth migration and four-way splitting schemes.JOURNAL OF COMPUTATIONAL MATHEMATICS,24(4),463-474. |
| MLA | Zhang, Wen-sheng,et al."3D hybrid depth migration and four-way splitting schemes".JOURNAL OF COMPUTATIONAL MATHEMATICS 24.4(2006):463-474. |
入库方式： OAI收割
来源：数学与系统科学研究院
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