| 三维VSP非固定相移叠前深度偏移研究 |
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| 引用本文： | 姚忠瑞,王延光,乔玉雷,何惺华.三维VSP非固定相移叠前深度偏移研究[J].油气地球物理,2008(1):28-30,37. |
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| 作者姓名： | 姚忠瑞 王延光 乔玉雷 何惺华 |
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| 作者单位： | 胜利油田分公司物探研究院,山东省东营市257022 |
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| 摘 要： | 相移法适用于层状介质中局部大倾角构造的精确归位,但因不适应速度在横向上的变化,该方法的应用受到了限制。采用非固定相移算子的叠前深度偏移方法能够适应介质速度横向变化,同时克服了常规相移偏移算法中要求速度横向不变的缺点。该方法运用基于非固定滤波器理论的非固定相移算子,具有更高的精度和稳定性,叠前深度偏移算法采取分片均匀近似的策略提高了运算速度。该方法应用于三维VSP成像并在实际资料处理中取得了比较好的成像效果。
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| 关 键 词： | 3DVSP 非固定相移算子 叠前深度偏移 |
| 收稿时间： | 2007-08-27 |
| 修稿时间： | 2007-09-29 |
The research of 3D VSP variable phase-shift prestack depth migration |
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| YAO ZHong-rui.The research of 3D VSP variable phase-shift prestack depth migration[J].Petroleum Geophysics,2008(1):28-30,37. |
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| Authors: | YAO ZHong-rui |
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| Affiliation: | YAO ZHong-rui(Geophysical Research Institute of Shengli Oilfield Branch Co.,Dongying 257022,China) |
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| Abstract: | The method of phase-shift is applied in exact turning of local high dip structure in layered medium, limited by lateral variation of velocity. However, variable phase-shift prestack depth migration method with high accuracy and stability using variable phase-shift operators based on variable filter theory, improves operation speed by approximately uniformity block by block. The method is widely applied in 3D VSP imaging and has obtained good results. |
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| Keywords: | 3D VSP variable phase-shift operator and prestack depth migration |
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