| 频率慢度域自适应迭代反演算法压制海上倾斜缆鬼波方法及其应用 |
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| 引用本文： | 王冲,顾汉明,许自强,方中于,唐永杰,张健男,胡发动.频率慢度域自适应迭代反演算法压制海上倾斜缆鬼波方法及其应用[J].地球物理学报,2016,59(12):4677-4689. |
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| 作者姓名： | 王冲 顾汉明 许自强 方中于 唐永杰 张健男 胡发动 |
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| 作者单位： | 1. 中国地质大学地球物理与空间信息学院, 地球内部多尺度成像湖北省重点实验室, 武汉 430074;2. 中海油能源发展工程技术物探技术研究所, 广东湛江 524057 |
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| 基金项目： | 国家重大科技专项子专题“南海深水区油气勘探地球物理关键技术”（2016ZX05026-001）资助. |
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| 摘 要： | 海上倾斜缆采集技术具有多样的陷波特征,通过去鬼波处理可获得宽频数据.针对海水面波浪起伏及缆深误差引起的鬼波延迟时间估计误差以及崎岖海底和目的层深度变化使得鬼波和一次反射波的振幅差异系数随偏移距的变化而难以给定一个固定值的问题,本文推导出频率慢度域中鬼波滤波算子以及自适应迭代反演求解上行波算法,该鬼波滤波算子与不同水平慢度对应的鬼波和一次反射波的振幅差异系数以及鬼波延迟时间有关.并基于计算出的理论下行波与实际下行波之间的平方误差最小理论实现自适应反演迭代最优计算该振幅差异系数和鬼波延迟时间.合成的及某海上采集的倾斜缆数据去鬼波处理结果表明,频率慢度域自适应迭代反演算法能较好地去除海上变深度缆鬼波,能达到拓宽地震记录频带目的.
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| 关 键 词： | 倾斜缆采集 频率慢度域 自适应迭代反演 鬼波压制 宽频处理 |
| 收稿时间： | 2016-03-08 |
The application of adaptive iteration inversion algorithm to deghost for marine variable-depth streamer data in frequency-slowness domain |
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| WANG Chong,GU Han-Ming,XU Zi-Qiang,FANG Zhong-Yu,TANG Yong-Jie,ZHANG Jian-Nan,HU Fa-Dong.The application of adaptive iteration inversion algorithm to deghost for marine variable-depth streamer data in frequency-slowness domain[J].Chinese Journal of Geophysics,2016,59(12):4677-4689. |
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| Authors: | WANG Chong GU Han-Ming XU Zi-Qiang FANG Zhong-Yu TANG Yong-Jie ZHANG Jian-Nan HU Fa-Dong |
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| Institution: | 1. Hubei Subsurface Multi-scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China;2. CNOOC Energy Technology & Services-Development & Prospecting Geophysical Co., Guangdong Zhanjiang 524057, China |
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| Abstract: | The variable-depth streamer (VDS) acquisition technology in marine has receiver notch diversity. The broadband data can be obtained by special deghosting method. The choppy sea sarface and error of streamer depth will cause the error of the ghost-delay time with respect to primary reflection. The amplitude difference coefficient between ghost and primary reflection varies with offset due to rugged seabed and target depth variation, so the coefficient is difficult to be given a fixed value. The ghost filtering operator and adaptive iteration inversion algorithm to solve up-going wave in frequency-slowness domain are deduced. The ghost filtering operator is related to the ghost-delay time and the amplitude difference coefficient between ghost and primary reflection at each horizontal slowness. Then, the amplitude difference coefficient and ghost-delay time are optimally inverted by the adaptive iteration inversion algorithm through a least-squares fit of the theoretical down-going wave to actual down-going wave. The results of deghosting for synthetic and marine VDS seismic data show that the method can availably deghost for marine VDS data and achieve the purpose of broadband seismic data. |
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| Keywords: | Variable-depth streamer acquisition Frequency-slowness domain Adaptive iteration inversion Deghosting Broadband processing |
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