Seismic imaging studies of complex high and steep structures in Kuqa depression
文献类型：期刊论文
| 作者 | Fu Li-Yun1; Xiao You-Jun2; Sun Wei-Jia1; Wu Chao2; Guan Xi-Zhu1; Zhang Jing-Zhou2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2013-06-01 |
| 卷号 | 56期号:6页码:1985-2001 |
| 关键词 | Complex High And Steep Structures In Kuqa Depression Subtle Preprocessing Of Prestack Data Three-stage Migration Velocity Analyses Degenerate Fourier Migrator Prestack Time And Depth Migrations |
| DOI | 10.6038/cjg20130620 |
| 文献子类 | Article |
| 英文摘要 | Seismic imaging generally depends on data quality, velocity reliability, and migrator performance. Complex near-surface geological conditions in Kuqa depression cause extremely low signal-to-noise (S/N) ratios of seismic data. Salts penetrated into overthrust structures are widely distributed, vary in thickness and shape of complex geometries, and distort the imaging of subsalt faults, leading to complicated imaging problems. This article studies three key aspects. In the preprocessing of prestack data, some innovative techniques combined with commercial techniques are employed by three levels to improve data quality and reconstruct the reflections from depths. Three-stage migration velocity analyses, subtle DMO velocity analysis, prestack time-migration, and prestack depth-migration velocity analyses are implemented to build a topology-preservation prestack-migration velocity model. The time-depth conversion of the prestack time-migration velocity model is performed based on the Kuqa-depression modeling theory of salt-related overthrust complex structures combined with the velocity-varying mapping technique. The well-constrained seismic inversion for low-frequency velocities is conducted to handle the syncretization of the well-building and migration-building velocity fields. Finally, prestack time and depth migrations are performed by a semi-analytic degenerate Fourier migrator that improves the imaging of high-wavenumber components. Applications to the Dabei, Bozi, Quele, Xiqiu10, and Xiqiu4 structures result in well-positioned images for salt-related overthrust complex structures. |
| WOS关键词 | MIGRATION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000321415200020 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62620]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.PetroChina Co Ltd, Tarim Oilfield Co, Korla Xinjiang 841000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu Li-Yun,Xiao You-Jun,Sun Wei-Jia,et al. Seismic imaging studies of complex high and steep structures in Kuqa depression[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(6):1985-2001. |
| APA | Fu Li-Yun,Xiao You-Jun,Sun Wei-Jia,Wu Chao,Guan Xi-Zhu,&Zhang Jing-Zhou.(2013).Seismic imaging studies of complex high and steep structures in Kuqa depression.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(6),1985-2001. |
| MLA | Fu Li-Yun,et al."Seismic imaging studies of complex high and steep structures in Kuqa depression".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.6(2013):1985-2001. |
入库方式： OAI收割
来源：地质与地球物理研究所
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