Improving imaging quality using least-squares reverse time migration: application to data from Bohai basin
文献类型：期刊论文
| 作者 | Zhang, Hao1; Liu, Qiancheng1,3; Wu, Jizhong2 |
| 刊名 | JOURNAL OF GEOPHYSICS AND ENGINEERING
 |
| 出版日期 | 2017-10-01 |
| 卷号 | 14期号:5 |
| 关键词 | least-squares migration imaging quality reflectivity linear inversion |
| ISSN号 | 1742-2132 |
| DOI | 10.1088/1742-2140/aa7e49 |
| 文献子类 | Article |
| 英文摘要 | Least-squares reverse time migration (LSRTM) is a seismic imaging technique based on linear inversion, which usually aims to improve the quality of seismic images through removing the acquisition footprint, suppressing migration artifacts, and enhancing resolution. LSRTM has been shown to produce migration images with better quality than those computed by conventional migration. In this paper, our derivation of LSRTM approximates the near-incident reflection coefficient with the normal-incident reflection coefficient, which shows that the reflectivity term defined is related to the normal-incident reflection coefficient and the background velocity. With reflected data, LSRTM is mainly sensitive to impedance perturbations. According to an approximate relationship between them, we reformulate the perturbation related system into a reflection-coefficient related one. Then, we seek the inverted image through linearized iteration. In the proposed algorithm, we only need the migration velocity for LSRTM considering that the density changes gently when compared with migration velocity. To validate our algorithms, we first apply it to a synthetic case and then a field data set. Both applications illustrate that our imaging results are of good quality. |
| WOS关键词 | WAVE-EQUATION ; INVERSION ; VELOCITY ; REFLECTIVITY |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000411466000001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Major Project of China(2017ZX05008-007) ; China Postdoctoral Science Foundation(2017M610982) ; National Major Project of China(2017ZX05008-007) ; China Postdoctoral Science Foundation(2017M610982) ; National Major Project of China(2017ZX05008-007) ; China Postdoctoral Science Foundation(2017M610982) ; National Major Project of China(2017ZX05008-007) ; China Postdoctoral Science Foundation(2017M610982) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/61953]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Zhang, Hao |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing, Peoples R China 2.China Natl Petr Corp, Explorat & Dev Inst Jidong Oilfield, Tangshan, Peoples R China 3.UCL, Gower St, London WC1E 6BT, England |
| 推荐引用方式 GB/T 7714 | Zhang, Hao,Liu, Qiancheng,Wu, Jizhong. Improving imaging quality using least-squares reverse time migration: application to data from Bohai basin[J]. JOURNAL OF GEOPHYSICS AND ENGINEERING,2017,14(5). |
| APA | Zhang, Hao,Liu, Qiancheng,&Wu, Jizhong.(2017).Improving imaging quality using least-squares reverse time migration: application to data from Bohai basin.JOURNAL OF GEOPHYSICS AND ENGINEERING,14(5). |
| MLA | Zhang, Hao,et al."Improving imaging quality using least-squares reverse time migration: application to data from Bohai basin".JOURNAL OF GEOPHYSICS AND ENGINEERING 14.5(2017). |
入库方式： OAI收割
来源：地质与地球物理研究所
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