| LI Canping,GOU Limin,YOU Jiachun,LIU Xuewei,OU Chuling. 2016. Further studies on the numerical simulation of bubble plumes in the cold seepage active region. Acta Oceanologica Sinica, 35(1):118－124 |
| Further studies on the numerical simulation of bubble plumes in the cold seepage active region |
| 冷泉活动区气泡羽状流数值模拟的进一步研究 |
| Received:March 19, 2015 Revised:September 08, 2015 |
| DOI：10.1007/s13131-016-0803-3 |
| Key words:plume cold seepage gas hydrate scattered wave numerical simulation |
| 中文关键词: 羽状流 冷泉 天然气水合物 散射波 数值模拟 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | LI Canping | Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction (GLOD), Guangdong Ocean University, Zhanjiang 524088, China
Laboratory of Ocean Remote Sensing and Information Technology, Guangdong Ocean University, Zhanjiang 524088, China | | | GOU Limin | School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China | goulm@163.com | | YOU Jiachun | School of Geophysics and Information Technology, China University of Geosciences (Beijing), Beijing 100083, China | | | LIU Xuewei | School of Geophysics and Information Technology, China University of Geosciences (Beijing), Beijing 100083, China | | | OU Chuling | Laboratory of Ocean Remote Sensing and Information Technology, Guangdong Ocean University, Zhanjiang 524088, China | |
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| Abstract: |
| Using the occurrence characteristics of bubble plumes in the South China Sea as a reference, this paper continues to study the seismic responses produced by bubble plumes in the cold seepage active region. To make the plume modelling scheme more reasonable, we modified the original modelling scheme and reconstructed a plume water body model based on the variation of its radius as bubbles rise in seawater. The plume seismic records of shot gathers were obtained by forward simulation. The seismic records of single shot show obvious characteristics of a scattering wave field and the periodic characteristics of the model. Seismic records of shot gathers were processed using prestack depth migration. The boundary of its imaging section has a good convergence effect. The migration sections can be imaged distinctly with higher accuracy. The aforementioned studies once again laid a foundation for the further study of the seismic responses produced by plumes. They also gradually probed a more suitable seismic data processing method for plumes and provided a theoretical guidance for the identification of plumes. |
| 中文摘要: |
| 以南海气泡羽状流赋存特征为参考,本文继续研究冷泉活动区气泡羽状流的地震响应。为使羽状流建模方案更合理,根据水中气泡在上升过程时其半径的变化情况,修改原建模方案,重新建立了羽状流水体模型。通过正演模拟得到了羽状流炮集地震记录,单炮记录上显示出明显的散射波场特征和模型的周期特点。通过叠前深度偏移处理炮集地震记录,得到边界收敛效果较好的成像剖面,且成像精度较高。以上研究又一次奠定了羽状流地震响应进一步研究的基础,也逐步探索出更适合羽状流地震资料的处理方法,为识别羽状流提供了理论指导。 |
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