反射槽波绕射偏移成像及应用 |
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引用本文: | 姬广忠.反射槽波绕射偏移成像及应用[J].煤田地质与勘探,2017,45(1):121-124. |
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作者姓名: | 姬广忠 |
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基金项目: | 国家科技重大专项课题(2011ZX05040-002) |
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摘 要: | 反射槽波能够探测煤层中的小构造,但反射槽波信噪比低,探测效果不理想。为改进成像质量,分析了适用于反射槽波的预处理技术,从理论和实际应用两方面,通过三维槽波数值模拟和实际数据处理应用,验证了反射槽波绕射波偏移方法的有效性。结果表明:应用绕射波偏移方法时,需对反射槽波做Hilbert变换,使之适应槽波的特殊情况;绕射偏移时只需要一个速度,槽波速度基本恒定,槽波绕射偏移方法相对地面地震有独特优势。
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关 键 词: | 反射槽波 绕射偏移 煤层 断层 |
收稿时间: | 2016-03-16 |
Diffraction migration imaging of reflected in-seam waves and its application |
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Abstract: | The reflected in-seam waves can detect the small structure in the coal seam. At present, the researches on the reflected in-seam waves exploration are less at home and abroad, and the signal-to-noise ratio is low. In order to improve the image quality, the diffraction migration imaging method of reflected in-seam waves was investigated. The preprocessing technologies suitable for reflected in-seam waves were analyzed. Based on three-dimensional numerical simulations and actual data processing, the feasibilities of reflected in-seam waves were demonstrated for both theoretical models and practical applications. The results showed that reflected in-seam waves should do the Hilbert transform when diffraction migration imaging was used. The in-seam wave velocity is approximately constant and the diffraction migration requires only one velocity, constituting the unique advantages of reflected in-seam waves. |
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