| 非零偏移距声地层剖面多次波的时距分析及压制示例 |
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| 引用本文： | 王鹏伟,王修田. 非零偏移距声地层剖面多次波的时距分析及压制示例[J]. 中国海洋大学学报(自然科学版), 2011, 0(Z1): 324-330,340 |
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| 作者姓名： | 王鹏伟 王修田 |
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| 作者单位： | 中国海洋大学海洋地球科学学院;中国海洋大学海底科学与探测技术教育部重点实验室; |
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| 摘 要： | 基于对符合二维观测的模型中非零偏移距全程多次波时距关系的理论分析可知:无论地下反射界面为水平的还是倾斜的,非零偏移距的全程n次多次波的旅行时总是小于相应一次波旅行时的n倍,但非零偏移距与零偏移距全程多次波的时距差异,随偏移距的增大而增大,而随探测深度的增大而减小。基于该理论分析结论,对在零偏移距假设下计算的多次波旅行时先行调整,使其与非零偏移距的多次波旅行时相对应后再进行压制处理,可获得更高质量的声地层剖面。
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| 关 键 词： | 非零偏移距声地层剖面 全程多次波 非零偏移距多次波时距特征 |
Multiple Time-Distance Analysis and Attenuation Example on Non-Zero Offset Acoustic Sub-Bottom Profile |
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| WANG Peng-Wei,,WANG Xiu-Tian. Multiple Time-Distance Analysis and Attenuation Example on Non-Zero Offset Acoustic Sub-Bottom Profile[J]. Periodical of Ocean University of China, 2011, 0(Z1): 324-330,340 |
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| Authors: | WANG Peng-Wei WANG Xiu-Tian |
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| Affiliation: | WANG Peng-Wei1,2,WANG Xiu-Tian1,2(1.College of Marine Geosciences,2.Lab of Seafloor Science & Exploration Technique,Ocean University of China,Qingdao 266100,China) |
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| Abstract: | Based upon the theory analyses of models suitable for two-dimension observation with non-zero offset,it is found that for not only a dipping but also a horizontal sub-interface,the travel time of the nth order long-path multiple is always smaller than the n times of that of the primary wave.However the time-distance difference between the long-path multiple of non-zero offset and that of zero offset becomes greater as the offset gets longer,and smaller as the detective depth gets deeper.Based upon the theor... |
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| Keywords: | non-zero offset acoustic sub-bottom profile long-path multiple time-distance characteristics of non-zero offset multiples |
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