| 起伏地表直接叠前时间偏移 |
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| 引用本文： | 刘国峰,刘洪,李博,刘钦,佟小龙.起伏地表直接叠前时间偏移[J].石油地球物理勘探,2010,45(2):200. |
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| 作者姓名： | 刘国峰 刘洪 李博 刘钦 佟小龙 |
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| 作者单位： | 中国科学院地质与地球物理所油气资源研究重点实验室;北京吉星吉达科技有限公司; |
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| 基金项目： | 国家重点基础研究发展(973)计划(编号2007CB209603); 国家自然科学基金重点项目(40830424)资助 |
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| 摘 要： | 针对起伏地表直接进行叠前时间偏移是目前复杂山地地震资料叠前成像处理的方向。如今研究的侧重点是通过参考面计算起伏地表条件下的地震波走时，进而进行叠前时间偏移，但是这一过程存在两个问题：其一是参考面选择不当会因高差和替换速度的不准确而带来走时计算误差；其二是地震数据经常规处理返回到采集地表面时可能破坏高频静校正效果。基于此，本文提出了以共成像孔径面为参考面且在共反射点道集上进行剩余时差校正的起伏地表叠前时间偏移的方法。文中分别应用简单模型、SEG起伏地表模型以及实际资料对该处理方法进行了测试，表明该方法是有效的。
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| 关 键 词： | 叠前时间偏移 起伏地表 地震数据处理 共成像孔径面 剩余时差校正 |
Direct pre-stack time migration on rugged topography |
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| Liu Guo-feng,Liu Hong,Li Bo,Liu Qin , Tong Xiao-long..Direct pre-stack time migration on rugged topography[J].Oil Geophysical Prospecting,2010,45(2):200. |
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| Authors: | Liu Guo-feng Liu Hong Li Bo Liu Qin Tong Xiao-long |
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| Affiliation: | Liu Guo-feng1,Liu Hong1,Li Bo1,Liu Qin2 and Tong Xiao-long2. 1. Key Lab of Oil & gas Resource Studies,Institute of Geology and Geophysics,China Academy of Sciences,Beijing City,100029,China2. Jixingjida Science & Technology Company Ltd.,China |
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| Abstract: | Directly conducting pre-stack time migration on rugged tomography is the future direction for seismic data pre-stack imaging in complex mountain areas. The current key point is to calculate the travel time from the reference plane under the rugged topography condition, and then the pre-stack time migration is conducted. However two problems exist for the calculation, at first travel time calculation error can be caused by inaccurate elevation and replacement velocity which is actually resulted from wrong se... |
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| Keywords: | pre-stack time migration rugged topography seismic data processing common imaging aperture plane residual moveout correction |
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