| 叠前时间偏移成像技术及其应用 |
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| 引用本文： | 崔汝国, 覃天, 凌勋, 贾明辰, 段云卿. 叠前时间偏移成像技术及其应用[J]. 物探与化探, 2006, (6): 541-544. doi: 10.3969/j.issn.1000-8918.2006.06.017 |
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| 作者姓名： | 崔汝国 覃天 凌勋 贾明辰 段云卿 |
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| 作者单位： | 中国地质大学,地下信息探测技术与仪器重点实验室,北京,100083;; 中国地质大学,地下信息探测技术与仪器重点实验室,北京,100083;; 中国石油新疆油田分公司,勘探开发研究院,新疆,克拉玛依,834000;; 中国石油新疆油田分公司,勘探开发研究院,新疆,克拉玛依,834000;; 中国地质大学,地下信息探测技术与仪器重点实验室,北京,100083 |
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| 摘 要： | 零炮检距剖面是地震反射成像过程中的重要成果.通过弯曲反射界面模型,分析了共中心点(CMP)道集与共反射点(CRP)道集的差别,认为当反射界面倾斜时,常规处理中的CMP叠加不能得到准确的零偏移距剖面,而沿CRP道集叠加的叠前时间偏移能得到准确的零偏移距剖面,另外,还介绍了叠前时间偏移的实现方法和步骤,包括预处理、偏移速度场的建立和偏移后CRP道集的处理等,并结合实际资料进行了效果分析.
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| 关 键 词： | 零偏移距剖面 共中心点道集 共反射点道集 叠加 叠前时间偏移 |
| 文章编号： | 1000-8918（2006）06-0541-04 |
| 收稿时间： | 2005-11-01 |
| 修稿时间： | 2005-11-01 |
THE PRESTACK TIME MIGRATION TECHNOLOGY AND ITS APPLICATION |
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| CUI Ru-guo, Qin Tian, Ling Xun, Jia Ming-cheng, DUAN Yun-qing. THE PRESTACK TIME MIGRATION TECHNOLOGY AND ITS APPLICATION[J]. Geophysical and Geochemical Exploration, 2006, (6): 541-544. doi: 10.3969/j.issn.1000-8918.2006.06.017 |
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| Authors: | CUI Ru-guo Qin Tian Ling Xun Jia Ming-cheng DUAN Yun-qing |
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| Affiliation: | 1. Geo-detection Laboratary, Ministry of Education, China University of Geosciences, Beijing 100083, China; 2. Research Institute of Exploration and Development, Xinjiang Branch Company of PetroChina , Karamay 834000, China |
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| Abstract: | The zero-offset(z_0) section is an important achievement in seismic reflection imaging.The differences between the common midpoint(CMP) and the common reflection point(CRP) are discussed on the basis of the dome-like reflector model.In usual seismic data processing,we cannot get the correct z_0 sections if oblique layers are imaged.However,the prestack time migration technique using CRP stacking can help us to obtain the correct z_0 sections.This paper discusses the key steps in the application of such prestack time migration techniques as seismic data preprocessing,construction of migration-velocity field and CRP gather processing after migration.The processing effects are demonstrated with real data. |
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| Keywords: | zero offset section common midpoint(CMP) gather common reflection point(CRP) gather stacking prestack time migration |
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