1. CNOOC China Ltd., Zhanjiang 524000, China.
2. State Key Laboratory of Intelligent Technology and Systems, Tsinghua National Laboratory for Information Science and Technology, Department of Automation, Tsinghua University, Beijing 100084, China.
摘要 传统的基于相位校正求和（dephase and sum）的上下缆地震数据合并技术在估计鬼波算子时假设海面是平静的。一般来说，实际的海面是起伏的，不满足平静海面假设，所以传统的相位校正求和方法在实际工作中所取得的效果不尽如人意。本文提出了一种自适应的上下缆地震数据合并技术，和传统方法相比，所提方法保留了传统方法所得到鬼波算子的相位谱，并在此基础上利用数据本身进一步自适应的估计鬼波算子的振幅谱，最后利用估计得到的鬼波算子实现上下缆数据的合并，达到压制鬼波的目的。 我们将所提方法应用到人工合成单炮数据上，实验结果证实了所提方法在起伏海面情况下的有效性。最后我们将所提方法应用到一个实际的上下三缆地震数据上，实验结果证明了所提方法能很好地压制鬼波，并拓宽有效频带。
Abstract：
The traditional “dephase and sum” algorithms for over/under data combination estimate the ghost operator by assuming a calm sea surface. However, the real sea surface is typically rough, which invalidates the calm sea surface assumption. Hence, the traditional “dephase and sum” algorithms might produce poor-quality results in rough sea conditions. We propose an adaptive over/under data combination method, which adaptively estimates the amplitude spectrum of the ghost operator from the over/under data, and then over/under data combinations are implemented using the estimated ghost operators. A synthetic single shot gather is used to verify the performance of the proposed method in rough sea surface conditions and a real triple over/under dataset demonstrates the method performance.
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2013, Vol. 10 
