| The study and analysis of floating datum selection for rugged terrain |
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| 作者姓名： | 何皎 刘玉柱 耿建华 |
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| 作者单位： | School of Ocean and Earth Science, Tongji University, Shanghai 100092, China |
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| 摘 要： | We analyze the characteristics of different floating datums for static corrections and discuss the methods for determining them. The effect of different floating datum corrections was studied using theoretical model experiments, resulting in the conclusion that the velocity obtained after the floating datum correction with the minimum static correction errors depends on the velocity of the layer below the low velocity layer （LVL） lower boundary and is not related to topographic relief and LVL structure. For the real data processing case, wave equation numerical model experiments were conducted which resulted in a new method for calculating objective functions based on the waveform and modifications to the calculation equation for minimum static correction errors to make the method suitable for real data static correction processing using inhomogeneous velocity models with lower velocity boundary relief. Real data processing results demonstrate the method＇s superiority.
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| 关 键 词： | 静电修正 漂浮数据 静态误差 粗糙地形 |
| 收稿时间： | 15 April 2007 |
| 修稿时间： | 2007-04-152007-05-25 |
The study and analysis of floating datum selection for rugged terrain |
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| Jiao He,Yuzhu Liu,Jianhua Geng.The study and analysis of floating datum selection for rugged terrain[J].Applied Geophysics,2007,4(2):101-110. |
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| Authors: | Jiao He Yuzhu Liu Jianhua Geng |
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| Institution: | (1) School of Ocean and Earth Science, Tongji University, Shanghai, 200092, China |
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| Abstract: | We analyze the characteristics of different floating datums for static corrections and discuss the methods for determining
them. The effect of different floating datum corrections was studied using theoretical model experiments, resulting in the
conclusion that the velocity obtained after the floating datum correction with the minimum static correction errors depends
on the velocity of the layer below the low velocity layer (LVL) lower boundary and is not related to topographic relief and
LVL structure. For the real data processing case, wave equation numerical model experiments were conducted which resulted
in a new method for calculating objective functions based on the waveform and modifications to the calculation equation for
minimum static correction errors to make the method suitable for real data static correction processing using inhomogeneous
velocity models with lower velocity boundary relief. Real data processing results demonstrate the method’s superiority.
He Jiao is a postgraduate student at Tongji University. She received a bachelor’s degree in Geophysics from Tongji University in
2006. Her research work is mainly the propagation of seismic waves and the detection and identification of marine seismic
data.
Liu Yuzhu received a bachelor’s degree in Geophysics from Tongji University in 2001, and got the master’s degree there in 2004. He
is studying for his doctorate and working as a lecturer in the School of Oceans and Earth Sciences at Tongji University. His
research work is mainly the seismic tomography and inversion.
Gen Jianhua received a PhD (1999) in Oceans Geology from Tongji University. Now he is a professor School of Ocean and Earth Science,
Tongji University. His research interests are seismic data processing and interpretation of rock physics |
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| Keywords: | static correction floating datum minimum static correction error |
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