| 叠前深度偏移技术在活动断层探测中的应用 |
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| 引用本文： | 尹军杰,吴子泉,李文慧.叠前深度偏移技术在活动断层探测中的应用[J].地震研究,2004,27(2):191-197. |
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| 作者姓名： | 尹军杰 吴子泉 李文慧 |
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| 作者单位： | 中国地质大学,北京,100083;中国地质大学,北京,100083;山东省地震局,济南,250014;帕拉代姆地球物理公司,北京,10004 |
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| 基金项目： | 山东省地震局资助博士生研究项目 |
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| 摘 要： | 通过叠前深度偏移与常规处理的方法原理对比及实例分析，说明叠前深度偏移技术利于求准速度的纵横向变化、利于提高复杂构造和小断层的成像清晰度和精度，该技术在精细速度分析、正确速度—深度模型建立和叠加方法上的优势，在浅层地震勘探中具有广泛的推广价值。文中叠前深度偏移技术在活动断层探测中的应用实例表明，叠前深度偏移剖面与常规处理剖面相比，具有如下特点：①归位准确、断点清楚；②分辨率和信噪比更高；③真实反映地下构造形态；④解决速度陷阱问题，直接、精确给出地质层位深度。
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| 关 键 词： | 叠前深度偏移 相干速度反演 层析成像 活动断层 浅层地震勘探 |
Application of Pre - stack - depth - migration Technique in Active - fault Exploration |
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| Yin Junjie Wu Ziquan , Li Wenhui.Application of Pre - stack - depth - migration Technique in Active - fault Exploration[J].Journal of Seismological Research,2004,27(2):191-197. |
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| Authors: | Yin Junjie Wu Ziquan Li Wenhui |
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| Institution: | Yin Junjie 1 Wu Ziquan 1,2 Li Wenhui 3 |
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| Abstract: | Based on the comparative analysis of pre-stack-depth-migration method and the conventional processing method, the pre-stack-depth-migration technique is proved to be favorable for precise velocity-analysis of velocity in the condition of strong vertical and lateral changes.It is also favorable for improving definition and precision images of complex structure and small faults.The technique has many advantages in precise velocity-analysis, velocity-depth model construction and stack method.So, it can be widely used in shallow seismic exploration.The practice of pre-stack-depth-migration technique in active-fault exploration shows that compared with conventional processing section, the pre-stack-depth-migration section has four characteristics as follows:(1) The migration is precise and the break-point is clear.(2) Resolution and signal-to-noise ratio are high.(3) The shape of subsurface structure can be accurately revealed.(4) velocity-inversion problem will be solved and the depth of geological layers can be obtained directly and exactly. |
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| Keywords: | pre-stack-depth migration velocity coherency inversion tomography active fault shallow seismic exploration |
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