| 基于直射线近似的一步法基准面校正方法研究 |
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| 引用本文： | 杨锴,蔡杰雄,范旭,毛海波.基于直射线近似的一步法基准面校正方法研究[J].地球物理学报,2009,52(4):1078-1088. |
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| 作者姓名： | 杨锴 蔡杰雄 范旭 毛海波 |
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| 作者单位： | 1.同济大学海洋与地球科学学院反射地震学科组，海洋地质国家重点实验室，上海 200092;2.中国石油股份公司新疆分公司勘探开发研究院地球物理研究所, 乌鲁木齐 830011 |
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| 基金项目： | 国家自然科学基金，海洋地质国家重点实验室开放基金 |
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| 摘 要： | 地形基准面校正算子（Topographic Datuming Operator，以下简称TDO）是一种基于直射线近似得到的基准面延拓算子.TDO可以视为是两步法波动方程基准面校正与常规静校正之间的一种过渡算法，该方法的最大特点在于它可以基于共炮点道集将炮点和检波点同时延拓到给定的水平基准面，因此相对于常规的两步法叠前波动方程基准面校正，TDO方法可以认为是一种更为高效的一步法基准面延拓方法.本文基于理论与实际数据论证了上述观点.
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| 关 键 词： | 地形基准面校正算子(TDO) 直射线近似 一步法基准面校正 延拓 |
| 收稿时间： | 2008-4-21 |
| 修稿时间： | 2009-3-8 |
Study on the one-step datuming method based on the straight-rays assumption |
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| YANG Kai,CAI Jie-Xiong,FAN Xu,MAO Hai-Bo.Study on the one-step datuming method based on the straight-rays assumption[J].Chinese Journal of Geophysics,2009,52(4):1078-1088. |
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| Authors: | YANG Kai CAI Jie-Xiong FAN Xu MAO Hai-Bo |
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| Institution: | 1.School of Marine & Earth Science, State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China;2.Research Department of Exploration & Development, Geophysical Research Institute of Xinjiang Oilfield Company，;
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| Abstract: | Based on the straight-rays approximation and the Snell law, a new datuming operator-Topographic Datuming Operator (TDO) is derived. The new redatuming operator derived here is based on straight-rays approximation above and below a chosen datum. It is directly applied to common-source gathers to downward continue the source and the receivers, simultaneously, from the rugged surface to the given datum level without resorting to common receiver gathers. As a result, the method is more efficient. In this paper, the theoretical foundation of the TDO is discussed in detail and the numerical tests are applied on the synthetic and real data. |
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| Keywords: | Topographic Datuming Operator (TDO) Straight-rays approximation One step datuming Extrapolation |
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