| 利用地震数据反演海水温盐结构 |
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| 引用本文： | 宋洋,宋海斌,陈林,董崇志,黄兴辉.利用地震数据反演海水温盐结构[J].地球物理学报,2010,53(11):2696-2702. |
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| 作者姓名： | 宋洋 宋海斌 陈林 董崇志 黄兴辉 |
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| 作者单位： | 1. 中国科学院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,北京 100029;
2. 中国科学院研究生院,北京 100049 |
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| 基金项目： | 国家自然科学基金，国家基础研究发展规划项目，欧盟项目 |
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| 摘 要： | 利用地震剖面获取海水层温度、盐度、密度等物理参数成为地震海洋学研究的一个重要问题.本文提出了以CTD(Conductivity-Temperature-Depth)温盐深剖面仪观测资料为约束的波阻抗、温-盐结构反演方法.该方法包括两个步骤:首先把少量的CTD作为"约束井"进行地震数据的波阻抗反演;然后利用从CTD资料获得的研究海区的温-盐关系式,结合波阻抗数据反演得到温度和盐度剖面.通过合成数据的试算表明,基于少量的CTD资料控制,利用地震数据可以反演得到高分辨率的二维温度、盐度结构.基于地震数据的温-盐结构反演方法有望弥补传统物理海洋学观测方法的不足,为海洋学研究提供大量的基础数据,有广泛的应用前景.
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| 关 键 词： | 地震海洋学 CTD约束地震反演 波阻抗 温度 盐度 |
| 收稿时间： | 2009-11-11 |
Sea water thermohaline structure inversion from seismic data |
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| SONG Yang,SONG Hai-Bin,CHEN Lin,DONG Chong-Zhi,HUANG Xing-Hui.Sea water thermohaline structure inversion from seismic data[J].Chinese Journal of Geophysics,2010,53(11):2696-2702. |
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| Authors: | SONG Yang SONG Hai-Bin CHEN Lin DONG Chong-Zhi HUANG Xing-Hui |
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| Institution: | 1. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2. Graduate University of Chinese Academy of Science, Beijing 100049, China |
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| Abstract: | It is an important issue to quantitatively determine the parameters (temperature, salinity, density, etc) of sea water column from seismic data in seismic oceanography research. This paper presents a CTD(Conductivity-Temperature-Depth)-controlled sea-water wave-impedance and thermohaline structure inversion method, which includes two steps: (1) wave impedance inversion using CTD data as controlling wells, (2) temperature and salinity inversion based on temperature and salinity relationship of the research region from CTD data. Synthetic seismogram experiment shows that 2D high-resolution temperature and salinity profiles can be obtained from seismic data if some CTD data are used as controlling wells in the inversion process. Sea water thermohaline structure inversion method can make up for some disadvantages of conventional physical oceanography measurement method, and provide a large quantity of basic oceanographic data for ocean science studies. |
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| Keywords: | Seismic oceanography CTD-constrained seismic inversion Wave impedance Temperature Salinity |
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