| 摘要: |
| 为适应复杂构造和岩性油气藏勘探开发对地震处理精度的需求,提出基于2D反褶积成像条件的保幅叠前深度偏移方法,实现基于2D反褶积成像条件的保幅分步傅里叶(SSF)叠前深度偏移(PSDM)。其主要思想为:在频率-震源波数域内,将所有炮延拓到同一成像点的上行与下行波反褶积,然后对所有频率和震源求和成像。其特点是能够克服非满覆盖次数地区成像能量弱的缺陷,并提高中深层目标区域的成像质量。模型试算结果验证了所提方法的正确性和有效性。 |
| 关键词: 2D反褶积 成像条件 保幅叠前深度偏移 |
| DOI：10.3969/j.issn.1673-5005.2011.05.009 |
| 分类号::P 631.4 |
| 文献标识码:A |
| 基金项目:国家油气重大专项课题(2008ZX05014-001-008HZ);2011中国石油大学(华东)研究生创新基金项目;中国石油大学自主创新科研计划项目(10CX04001A) |
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| Preserved amplitude prestack depth migration based on 2D deconvolution imaging condition |
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KONG Xue1, LI Zhen chun1, YE Yue ming2, HUANG Jian ping1, GUO Qian1
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(1.School of Geosciences in China University of Petroleum, Qingdao 266555, China;2.Hangzhou Research Institute of Geology, PetroChina, Hangzhou 310023, China)
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| Abstract: |
| In order to adapt for the exploration and development of complex structures and lithologic hydrocarbon reservoirs, a preserved amplitude prestack depth migration method based on 2D deconvolution imaging condition was presented, implementing preserved amplitude split step Fourier prestack depth migration based on 2D deconvolution imaging condition. First, the receiver wavefield was deconvolved by the source wavefield in shot time dimensions. Then the zero lag results were extracted to form the imaging profile commanding the consistency of time and shot position. The numerical results show that this method not only enhances the imaging energy of weak imaging areas where the folds are not full, but also improves the imaging quality of deep target layers. |
| Key words: 2D deconvolution imaging condition pre stack depth migration |
