| 相移加校正变范围三维叠前深度偏移 |
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| 引用本文： | 李录明,罗省贤.相移加校正变范围三维叠前深度偏移[J].成都理工大学学报(自然科学版),1999,26(4):31. |
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| 作者姓名： | 李录明 罗省贤 |
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| 作者单位： | 1. 成都理工学院信息工程与地球物理系,成都,610059
2. 成都理工学院计算机工程系 |
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| 基金项目： | 中国石油天然气总公司资助项目 |
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| 摘 要： | 理论和实践证明，三维叠前深度偏移是目前最精确的地震波场成像方法。该文在二维叠前深度偏移及偏移速度模型建立方法研究的基础上，进一步研究了变范围三维叠前深度偏移叠加方法和软件。用三维相移加校正方法在炮集上实现三维叠前深度偏移，并根据三维速度模型构造形态，自动确定偏移后成像孔径进行变范围偏移叠加，提高三维构造形态清晰度。该方法属全波动方程偏移，具有成像精度高，对模型适应性强的特点
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| 关 键 词： | 三维叠前深度偏移 变范围偏移叠加 三维速度模型 层速度 |
| 修稿时间： | 1999-03-26 |
VARIABLE RANGE 3-D PRESTACK DEPTH MIGRATION BY PHASE SHIFT PLUS CORRECTION |
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| Li Luming,Luo Shengxian.VARIABLE RANGE 3-D PRESTACK DEPTH MIGRATION BY PHASE SHIFT PLUS CORRECTION[J].Journal of Chengdu University of Technology: Sci & Technol Ed,1999,26(4):31. |
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| Authors: | Li Luming Luo Shengxian |
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| Abstract: | The theory and practice prove that prestack depth migration is the most accurate imaging method of seismic wavefield at present. Based on 2 D prestack depth migration and the creation of migration velocity model , the authors have studied and realized the method and software of variable range 3 D prestack depth migration . The migration imaging range is determined according to the structural attitude of 3 D velocity model , and the variable range 3 D prestack depth migration is done on the CSP gathers by phase shift plus correction . The migrated structural feature is more distinct. The method is a kind of full wave equation migration and is characterized by the high wavefield imaging precision and good adaptation to the models. |
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| Keywords: | D prestack depth migration variable range migration stack 3 D velocity model interval velocity |
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