High-resolution imaging: a wavelet stretch correction in de-absorption prestack time migration approach
文献类型：期刊论文
| 作者 | Wang, Jin3,4; Xu, Jincheng2,4; Zhang, Jiangfeng2,4; Liu, Qiancheng1,5; Liu, Linong4 |
| 刊名 | EXPLORATION GEOPHYSICS
 |
| 出版日期 | 2020-07-03 |
| 卷号 | 51期号:4页码:446-455 |
| 关键词 | Viscoelasticity stretch correction prestack migration far offset |
| ISSN号 | 0812-3985 |
| DOI | 10.1080/08123985.2019.1706219 |
| 英文摘要 | The wavelet stretch effects in pre-stack migration, which is similar to that of NMO stretch, distort the frequency spectrums and taper the high-frequency components at far offsets. The long-offset migrated results in conventional migration methods are muted, resulting in a loss of effective information about the subsurface investigation. Only short-offset data are used to obtain a high-resolution stacked image. However, long-offsets that correspond to high-incident-angle data are critical to velocity inversion and amplitude versus offset (AVO) analysis when estimating lithology and fluid product. Furthermore, attenuation of seismic waves due to the anelasticity of the subsurface medium will cause dissipation of seismic energy and loss of high frequencies, thus broadening the propagating wavelet and degrading the resolution of imaging. Both the wavelet stretch and the absorption will taper the high-frequency components. We developed a wavelet stretch correction and absorption compensation scheme during the migration process by shrinking the wavelet when applying the imaging condition, which matches the stretch effect caused by migration. The correction factor is derived based on the incidence angle associated with many factors. Moreover, the de-absorption pre-stack time migration (QPSTM) is implemented on the effectiveQmodel that makes theQmodelling become easier. Both the application of synthetic and real data examples demonstrate that the proposed anti-stretch QPSTM can be particularly useful recovering the high-frequency components caused by anelasticity and wavelet stretch, and obtain higher-resolution images. |
| WOS关键词 | NORMAL-MOVEOUT ; DEPTH MIGRATION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000562754600004 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/97676]  |
| 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 | Wang, Jin; Xu, Jincheng |
| 作者单位 | 1.King Abdullah Univ Sci & Technol, Thuwal, Saudi Arabia 2.Southern Univ Sci & Technol, Dept Earth & SpaceSci, Shenzhen 518055, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 5.UCL, London, England |
| 推荐引用方式 GB/T 7714 | Wang, Jin,Xu, Jincheng,Zhang, Jiangfeng,et al. High-resolution imaging: a wavelet stretch correction in de-absorption prestack time migration approach[J]. EXPLORATION GEOPHYSICS,2020,51(4):446-455. |
| APA | Wang, Jin,Xu, Jincheng,Zhang, Jiangfeng,Liu, Qiancheng,&Liu, Linong.(2020).High-resolution imaging: a wavelet stretch correction in de-absorption prestack time migration approach.EXPLORATION GEOPHYSICS,51(4),446-455. |
| MLA | Wang, Jin,et al."High-resolution imaging: a wavelet stretch correction in de-absorption prestack time migration approach".EXPLORATION GEOPHYSICS 51.4(2020):446-455. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。